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-rw-r--r--ChangeLog13
-rw-r--r--sysdeps/powerpc/powerpc32/power4/memcmp.S1064
-rw-r--r--sysdeps/powerpc/powerpc32/power7/memcmp.S1626
-rw-r--r--sysdeps/powerpc/powerpc64/power4/memcmp.S1041
-rw-r--r--sysdeps/powerpc/powerpc64/power7/memcmp.S1613
5 files changed, 3464 insertions, 1893 deletions
diff --git a/ChangeLog b/ChangeLog
index 74c6203c97..51311857a6 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,5 +1,18 @@
2013-10-04 Alan Modra <amodra@gmail.com>
+ * sysdeps/powerpc/powerpc64/power7/memcmp.S: Add little-endian support.
+ Formatting. Consistently use rXXX register defines or rN defines.
+ Use early exit labels that avoid restoring unused non-volatile regs.
+ Make cr field use more consistent with rWORDn compares. Rename
+ regs used as shift registers for unaligned loop, using rN defines
+ for short lifetime/multiple use regs.
+ * sysdeps/powerpc/powerpc64/power4/memcmp.S: Likewise.
+ * sysdeps/powerpc/powerpc32/power7/memcmp.S: Likewise. Exit with
+ addi 1,1,64 to pop stack frame. Simplify return value code.
+ * sysdeps/powerpc/powerpc32/power4/memcmp.S: Likewise.
+
+2013-10-04 Alan Modra <amodra@gmail.com>
+
* sysdeps/powerpc/powerpc64/power7/strchr.S (strchr): Add little-endian
support. Correct typos, formatting. Optimize tail. Use insrdi
rather than rlwimi.
diff --git a/sysdeps/powerpc/powerpc32/power4/memcmp.S b/sysdeps/powerpc/powerpc32/power4/memcmp.S
index 9a455a3c68..35e162667d 100644
--- a/sysdeps/powerpc/powerpc32/power4/memcmp.S
+++ b/sysdeps/powerpc/powerpc32/power4/memcmp.S
@@ -1,4 +1,4 @@
-/* Optimized strcmp implementation for PowerPC64.
+/* Optimized strcmp implementation for PowerPC32.
Copyright (C) 2003-2013 Free Software Foundation, Inc.
This file is part of the GNU C Library.
@@ -18,13 +18,14 @@
#include <sysdep.h>
-/* int [r3] memcmp (const char *s1 [r3], const char *s2 [r4], size_t size [r5]) */
+/* int [r3] memcmp (const char *s1 [r3],
+ const char *s2 [r4],
+ size_t size [r5]) */
.machine power4
EALIGN (memcmp, 4, 0)
CALL_MCOUNT
-#define rTMP r0
#define rRTN r3
#define rSTR1 r3 /* first string arg */
#define rSTR2 r4 /* second string arg */
@@ -35,33 +36,32 @@ EALIGN (memcmp, 4, 0)
#define rWORD4 r9 /* next word in s2 */
#define rWORD5 r10 /* next word in s1 */
#define rWORD6 r11 /* next word in s2 */
-#define rBITDIF r12 /* bits that differ in s1 & s2 words */
#define rWORD7 r30 /* next word in s1 */
#define rWORD8 r31 /* next word in s2 */
- xor rTMP, rSTR2, rSTR1
+ xor r0, rSTR2, rSTR1
cmplwi cr6, rN, 0
cmplwi cr1, rN, 12
- clrlwi. rTMP, rTMP, 30
- clrlwi rBITDIF, rSTR1, 30
- cmplwi cr5, rBITDIF, 0
+ clrlwi. r0, r0, 30
+ clrlwi r12, rSTR1, 30
+ cmplwi cr5, r12, 0
beq- cr6, L(zeroLength)
- dcbt 0,rSTR1
- dcbt 0,rSTR2
+ dcbt 0, rSTR1
+ dcbt 0, rSTR2
/* If less than 8 bytes or not aligned, use the unaligned
byte loop. */
blt cr1, L(bytealigned)
- stwu 1,-64(1)
+ stwu 1, -64(r1)
cfi_adjust_cfa_offset(64)
- stw r31,48(1)
- cfi_offset(31,(48-64))
- stw r30,44(1)
- cfi_offset(30,(44-64))
+ stw rWORD8, 48(r1)
+ cfi_offset(rWORD8, (48-64))
+ stw rWORD7, 44(r1)
+ cfi_offset(rWORD7, (44-64))
bne L(unaligned)
/* At this point we know both strings have the same alignment and the
- compare length is at least 8 bytes. rBITDIF contains the low order
+ compare length is at least 8 bytes. r12 contains the low order
2 bits of rSTR1 and cr5 contains the result of the logical compare
- of rBITDIF to 0. If rBITDIF == 0 then we are already word
+ of r12 to 0. If r12 == 0 then we are already word
aligned and can perform the word aligned loop.
Otherwise we know the two strings have the same alignment (but not
@@ -70,74 +70,95 @@ EALIGN (memcmp, 4, 0)
eliminate bits preceding the first byte. Since we want to join the
normal (word aligned) compare loop, starting at the second word,
we need to adjust the length (rN) and special case the loop
- versioning for the first word. This insures that the loop count is
+ versioning for the first word. This ensures that the loop count is
correct and the first word (shifted) is in the expected register pair. */
- .align 4
+ .align 4
L(samealignment):
clrrwi rSTR1, rSTR1, 2
clrrwi rSTR2, rSTR2, 2
beq cr5, L(Waligned)
- add rN, rN, rBITDIF
- slwi r11, rBITDIF, 3
- srwi rTMP, rN, 4 /* Divide by 16 */
- andi. rBITDIF, rN, 12 /* Get the word remainder */
+ add rN, rN, r12
+ slwi rWORD6, r12, 3
+ srwi r0, rN, 4 /* Divide by 16 */
+ andi. r12, rN, 12 /* Get the word remainder */
+#ifdef __LITTLE_ENDIAN__
+ lwbrx rWORD1, 0, rSTR1
+ lwbrx rWORD2, 0, rSTR2
+ addi rSTR1, rSTR1, 4
+ addi rSTR2, rSTR2, 4
+#else
lwz rWORD1, 0(rSTR1)
lwz rWORD2, 0(rSTR2)
- cmplwi cr1, rBITDIF, 8
+#endif
+ cmplwi cr1, r12, 8
cmplwi cr7, rN, 16
clrlwi rN, rN, 30
beq L(dPs4)
- mtctr rTMP /* Power4 wants mtctr 1st in dispatch group */
+ mtctr r0 /* Power4 wants mtctr 1st in dispatch group */
bgt cr1, L(dPs3)
beq cr1, L(dPs2)
/* Remainder is 4 */
- .align 3
+ .align 3
L(dsP1):
- slw rWORD5, rWORD1, r11
- slw rWORD6, rWORD2, r11
+ slw rWORD5, rWORD1, rWORD6
+ slw rWORD6, rWORD2, rWORD6
cmplw cr5, rWORD5, rWORD6
blt cr7, L(dP1x)
/* Do something useful in this cycle since we have to branch anyway. */
+#ifdef __LITTLE_ENDIAN__
+ lwbrx rWORD1, 0, rSTR1
+ lwbrx rWORD2, 0, rSTR2
+ addi rSTR1, rSTR1, 4
+ addi rSTR2, rSTR2, 4
+#else
lwz rWORD1, 4(rSTR1)
lwz rWORD2, 4(rSTR2)
- cmplw cr0, rWORD1, rWORD2
+#endif
+ cmplw cr7, rWORD1, rWORD2
b L(dP1e)
/* Remainder is 8 */
- .align 4
+ .align 4
L(dPs2):
- slw rWORD5, rWORD1, r11
- slw rWORD6, rWORD2, r11
+ slw rWORD5, rWORD1, rWORD6
+ slw rWORD6, rWORD2, rWORD6
cmplw cr6, rWORD5, rWORD6
blt cr7, L(dP2x)
/* Do something useful in this cycle since we have to branch anyway. */
+#ifdef __LITTLE_ENDIAN__
+ lwbrx rWORD7, 0, rSTR1
+ lwbrx rWORD8, 0, rSTR2
+ addi rSTR1, rSTR1, 4
+ addi rSTR2, rSTR2, 4
+#else
lwz rWORD7, 4(rSTR1)
lwz rWORD8, 4(rSTR2)
+#endif
cmplw cr5, rWORD7, rWORD8
b L(dP2e)
/* Remainder is 12 */
- .align 4
+ .align 4
L(dPs3):
- slw rWORD3, rWORD1, r11
- slw rWORD4, rWORD2, r11
+ slw rWORD3, rWORD1, rWORD6
+ slw rWORD4, rWORD2, rWORD6
cmplw cr1, rWORD3, rWORD4
b L(dP3e)
/* Count is a multiple of 16, remainder is 0 */
- .align 4
+ .align 4
L(dPs4):
- mtctr rTMP /* Power4 wants mtctr 1st in dispatch group */
- slw rWORD1, rWORD1, r11
- slw rWORD2, rWORD2, r11
- cmplw cr0, rWORD1, rWORD2
+ mtctr r0 /* Power4 wants mtctr 1st in dispatch group */
+ slw rWORD1, rWORD1, rWORD6
+ slw rWORD2, rWORD2, rWORD6
+ cmplw cr7, rWORD1, rWORD2
b L(dP4e)
/* At this point we know both strings are word aligned and the
compare length is at least 8 bytes. */
- .align 4
+ .align 4
L(Waligned):
- andi. rBITDIF, rN, 12 /* Get the word remainder */
- srwi rTMP, rN, 4 /* Divide by 16 */
- cmplwi cr1, rBITDIF, 8
+ andi. r12, rN, 12 /* Get the word remainder */
+ srwi r0, rN, 4 /* Divide by 16 */
+ cmplwi cr1, r12, 8
cmplwi cr7, rN, 16
clrlwi rN, rN, 30
beq L(dP4)
@@ -145,177 +166,352 @@ L(Waligned):
beq cr1, L(dP2)
/* Remainder is 4 */
- .align 4
+ .align 4
L(dP1):
- mtctr rTMP /* Power4 wants mtctr 1st in dispatch group */
+ mtctr r0 /* Power4 wants mtctr 1st in dispatch group */
/* Normally we'd use rWORD7/rWORD8 here, but since we might exit early
(8-15 byte compare), we want to use only volatile registers. This
means we can avoid restoring non-volatile registers since we did not
change any on the early exit path. The key here is the non-early
exit path only cares about the condition code (cr5), not about which
register pair was used. */
+#ifdef __LITTLE_ENDIAN__
+ lwbrx rWORD5, 0, rSTR1
+ lwbrx rWORD6, 0, rSTR2
+ addi rSTR1, rSTR1, 4
+ addi rSTR2, rSTR2, 4
+#else
lwz rWORD5, 0(rSTR1)
lwz rWORD6, 0(rSTR2)
+#endif
cmplw cr5, rWORD5, rWORD6
blt cr7, L(dP1x)
+#ifdef __LITTLE_ENDIAN__
+ lwbrx rWORD1, 0, rSTR1
+ lwbrx rWORD2, 0, rSTR2
+ addi rSTR1, rSTR1, 4
+ addi rSTR2, rSTR2, 4
+#else
lwz rWORD1, 4(rSTR1)
lwz rWORD2, 4(rSTR2)
- cmplw cr0, rWORD1, rWORD2
+#endif
+ cmplw cr7, rWORD1, rWORD2
L(dP1e):
+#ifdef __LITTLE_ENDIAN__
+ lwbrx rWORD3, 0, rSTR1
+ lwbrx rWORD4, 0, rSTR2
+ addi rSTR1, rSTR1, 4
+ addi rSTR2, rSTR2, 4
+#else
lwz rWORD3, 8(rSTR1)
lwz rWORD4, 8(rSTR2)
+#endif
cmplw cr1, rWORD3, rWORD4
+#ifdef __LITTLE_ENDIAN__
+ lwbrx rWORD5, 0, rSTR1
+ lwbrx rWORD6, 0, rSTR2
+ addi rSTR1, rSTR1, 4
+ addi rSTR2, rSTR2, 4
+#else
lwz rWORD5, 12(rSTR1)
lwz rWORD6, 12(rSTR2)
+#endif
cmplw cr6, rWORD5, rWORD6
- bne cr5, L(dLcr5)
- bne cr0, L(dLcr0)
+ bne cr5, L(dLcr5x)
+ bne cr7, L(dLcr7x)
+#ifdef __LITTLE_ENDIAN__
+ lwbrx rWORD7, 0, rSTR1
+ lwbrx rWORD8, 0, rSTR2
+ addi rSTR1, rSTR1, 4
+ addi rSTR2, rSTR2, 4
+#else
lwzu rWORD7, 16(rSTR1)
lwzu rWORD8, 16(rSTR2)
+#endif
bne cr1, L(dLcr1)
cmplw cr5, rWORD7, rWORD8
bdnz L(dLoop)
bne cr6, L(dLcr6)
- lwz r30,44(1)
- lwz r31,48(1)
- .align 3
+ lwz rWORD7, 44(r1)
+ lwz rWORD8, 48(r1)
+ .align 3
L(dP1x):
slwi. r12, rN, 3
- bne cr5, L(dLcr5)
+ bne cr5, L(dLcr5x)
subfic rN, r12, 32 /* Shift count is 32 - (rN * 8). */
- lwz 1,0(1)
+ addi 1, 1, 64
+ cfi_adjust_cfa_offset(-64)
bne L(d00)
li rRTN, 0
blr
/* Remainder is 8 */
- .align 4
+ .align 4
+ cfi_adjust_cfa_offset(64)
L(dP2):
- mtctr rTMP /* Power4 wants mtctr 1st in dispatch group */
+ mtctr r0 /* Power4 wants mtctr 1st in dispatch group */
+#ifdef __LITTLE_ENDIAN__
+ lwbrx rWORD5, 0, rSTR1
+ lwbrx rWORD6, 0, rSTR2
+ addi rSTR1, rSTR1, 4
+ addi rSTR2, rSTR2, 4
+#else
lwz rWORD5, 0(rSTR1)
lwz rWORD6, 0(rSTR2)
+#endif
cmplw cr6, rWORD5, rWORD6
blt cr7, L(dP2x)
+#ifdef __LITTLE_ENDIAN__
+ lwbrx rWORD7, 0, rSTR1
+ lwbrx rWORD8, 0, rSTR2
+ addi rSTR1, rSTR1, 4
+ addi rSTR2, rSTR2, 4
+#else
lwz rWORD7, 4(rSTR1)
lwz rWORD8, 4(rSTR2)
+#endif
cmplw cr5, rWORD7, rWORD8
L(dP2e):
+#ifdef __LITTLE_ENDIAN__
+ lwbrx rWORD1, 0, rSTR1
+ lwbrx rWORD2, 0, rSTR2
+ addi rSTR1, rSTR1, 4
+ addi rSTR2, rSTR2, 4
+#else
lwz rWORD1, 8(rSTR1)
lwz rWORD2, 8(rSTR2)
- cmplw cr0, rWORD1, rWORD2
+#endif
+ cmplw cr7, rWORD1, rWORD2
+#ifdef __LITTLE_ENDIAN__
+ lwbrx rWORD3, 0, rSTR1
+ lwbrx rWORD4, 0, rSTR2
+ addi rSTR1, rSTR1, 4
+ addi rSTR2, rSTR2, 4
+#else
lwz rWORD3, 12(rSTR1)
lwz rWORD4, 12(rSTR2)
+#endif
cmplw cr1, rWORD3, rWORD4
+#ifndef __LITTLE_ENDIAN__
addi rSTR1, rSTR1, 4
addi rSTR2, rSTR2, 4
+#endif
bne cr6, L(dLcr6)
bne cr5, L(dLcr5)
b L(dLoop2)
/* Again we are on a early exit path (16-23 byte compare), we want to
only use volatile registers and avoid restoring non-volatile
registers. */
- .align 4
+ .align 4
L(dP2x):
+#ifdef __LITTLE_ENDIAN__
+ lwbrx rWORD3, 0, rSTR1
+ lwbrx rWORD4, 0, rSTR2
+ addi rSTR1, rSTR1, 4
+ addi rSTR2, rSTR2, 4
+#else
lwz rWORD3, 4(rSTR1)
lwz rWORD4, 4(rSTR2)
- cmplw cr5, rWORD3, rWORD4
+#endif
+ cmplw cr1, rWORD3, rWORD4
slwi. r12, rN, 3
- bne cr6, L(dLcr6)
+ bne cr6, L(dLcr6x)
+#ifndef __LITTLE_ENDIAN__
addi rSTR1, rSTR1, 4
addi rSTR2, rSTR2, 4
- bne cr5, L(dLcr5)
+#endif
+ bne cr1, L(dLcr1x)
subfic rN, r12, 32 /* Shift count is 32 - (rN * 8). */
- lwz 1,0(1)
+ addi 1, 1, 64
+ cfi_adjust_cfa_offset(-64)
bne L(d00)
li rRTN, 0
blr
/* Remainder is 12 */
- .align 4
+ .align 4
+ cfi_adjust_cfa_offset(64)
L(dP3):
- mtctr rTMP /* Power4 wants mtctr 1st in dispatch group */
+ mtctr r0 /* Power4 wants mtctr 1st in dispatch group */
+#ifdef __LITTLE_ENDIAN__
+ lwbrx rWORD3, 0, rSTR1
+ lwbrx rWORD4, 0, rSTR2
+ addi rSTR1, rSTR1, 4
+ addi rSTR2, rSTR2, 4
+#else
lwz rWORD3, 0(rSTR1)
lwz rWORD4, 0(rSTR2)
+#endif
cmplw cr1, rWORD3, rWORD4
L(dP3e):
+#ifdef __LITTLE_ENDIAN__
+ lwbrx rWORD5, 0, rSTR1
+ lwbrx rWORD6, 0, rSTR2
+ addi rSTR1, rSTR1, 4
+ addi rSTR2, rSTR2, 4
+#else
lwz rWORD5, 4(rSTR1)
lwz rWORD6, 4(rSTR2)
+#endif
cmplw cr6, rWORD5, rWORD6
blt cr7, L(dP3x)
+#ifdef __LITTLE_ENDIAN__
+ lwbrx rWORD7, 0, rSTR1
+ lwbrx rWORD8, 0, rSTR2
+ addi rSTR1, rSTR1, 4
+ addi rSTR2, rSTR2, 4
+#else
lwz rWORD7, 8(rSTR1)
lwz rWORD8, 8(rSTR2)
+#endif
cmplw cr5, rWORD7, rWORD8
+#ifdef __LITTLE_ENDIAN__
+ lwbrx rWORD1, 0, rSTR1
+ lwbrx rWORD2, 0, rSTR2
+ addi rSTR1, rSTR1, 4
+ addi rSTR2, rSTR2, 4
+#else
lwz rWORD1, 12(rSTR1)
lwz rWORD2, 12(rSTR2)
- cmplw cr0, rWORD1, rWORD2
+#endif
+ cmplw cr7, rWORD1, rWORD2
+#ifndef __LITTLE_ENDIAN__
addi rSTR1, rSTR1, 8
addi rSTR2, rSTR2, 8
+#endif
bne cr1, L(dLcr1)
bne cr6, L(dLcr6)
b L(dLoop1)
/* Again we are on a early exit path (24-31 byte compare), we want to
only use volatile registers and avoid restoring non-volatile
registers. */
- .align 4
+ .align 4
L(dP3x):
+#ifdef __LITTLE_ENDIAN__
+ lwbrx rWORD1, 0, rSTR1
+ lwbrx rWORD2, 0, rSTR2
+ addi rSTR1, rSTR1, 4
+ addi rSTR2, rSTR2, 4
+#else
lwz rWORD1, 8(rSTR1)
lwz rWORD2, 8(rSTR2)
- cmplw cr5, rWORD1, rWORD2
+#endif
+ cmplw cr7, rWORD1, rWORD2
slwi. r12, rN, 3
- bne cr1, L(dLcr1)
+ bne cr1, L(dLcr1x)
+#ifndef __LITTLE_ENDIAN__
addi rSTR1, rSTR1, 8
addi rSTR2, rSTR2, 8
- bne cr6, L(dLcr6)
+#endif
+ bne cr6, L(dLcr6x)
subfic rN, r12, 32 /* Shift count is 32 - (rN * 8). */
- bne cr5, L(dLcr5)
- lwz 1,0(1)
+ bne cr7, L(dLcr7x)
+ addi 1, 1, 64
+ cfi_adjust_cfa_offset(-64)
bne L(d00)
li rRTN, 0
blr
/* Count is a multiple of 16, remainder is 0 */
- .align 4
+ .align 4
+ cfi_adjust_cfa_offset(64)
L(dP4):
- mtctr rTMP /* Power4 wants mtctr 1st in dispatch group */
+ mtctr r0 /* Power4 wants mtctr 1st in dispatch group */
+#ifdef __LITTLE_ENDIAN__
+ lwbrx rWORD1, 0, rSTR1
+ lwbrx rWORD2, 0, rSTR2
+ addi rSTR1, rSTR1, 4
+ addi rSTR2, rSTR2, 4
+#else
lwz rWORD1, 0(rSTR1)
lwz rWORD2, 0(rSTR2)
- cmplw cr0, rWORD1, rWORD2
+#endif
+ cmplw cr7, rWORD1, rWORD2
L(dP4e):
+#ifdef __LITTLE_ENDIAN__
+ lwbrx rWORD3, 0, rSTR1
+ lwbrx rWORD4, 0, rSTR2
+ addi rSTR1, rSTR1, 4
+ addi rSTR2, rSTR2, 4
+#else
lwz rWORD3, 4(rSTR1)
lwz rWORD4, 4(rSTR2)
+#endif
cmplw cr1, rWORD3, rWORD4
+#ifdef __LITTLE_ENDIAN__
+ lwbrx rWORD5, 0, rSTR1
+ lwbrx rWORD6, 0, rSTR2
+ addi rSTR1, rSTR1, 4
+ addi rSTR2, rSTR2, 4
+#else
lwz rWORD5, 8(rSTR1)
lwz rWORD6, 8(rSTR2)
+#endif
cmplw cr6, rWORD5, rWORD6
+#ifdef __LITTLE_ENDIAN__
+ lwbrx rWORD7, 0, rSTR1
+ lwbrx rWORD8, 0, rSTR2
+ addi rSTR1, rSTR1, 4
+ addi rSTR2, rSTR2, 4
+#else
lwzu rWORD7, 12(rSTR1)
lwzu rWORD8, 12(rSTR2)
+#endif
cmplw cr5, rWORD7, rWORD8
- bne cr0, L(dLcr0)
+ bne cr7, L(dLcr7)
bne cr1, L(dLcr1)
bdz- L(d24) /* Adjust CTR as we start with +4 */
/* This is the primary loop */
- .align 4
+ .align 4
L(dLoop):
+#ifdef __LITTLE_ENDIAN__
+ lwbrx rWORD1, 0, rSTR1
+ lwbrx rWORD2, 0, rSTR2
+ addi rSTR1, rSTR1, 4
+ addi rSTR2, rSTR2, 4
+#else
lwz rWORD1, 4(rSTR1)
lwz rWORD2, 4(rSTR2)
+#endif
cmplw cr1, rWORD3, rWORD4
bne cr6, L(dLcr6)
L(dLoop1):
+#ifdef __LITTLE_ENDIAN__
+ lwbrx rWORD3, 0, rSTR1
+ lwbrx rWORD4, 0, rSTR2
+ addi rSTR1, rSTR1, 4
+ addi rSTR2, rSTR2, 4
+#else
lwz rWORD3, 8(rSTR1)
lwz rWORD4, 8(rSTR2)
+#endif
cmplw cr6, rWORD5, rWORD6
bne cr5, L(dLcr5)
L(dLoop2):
+#ifdef __LITTLE_ENDIAN__
+ lwbrx rWORD5, 0, rSTR1
+ lwbrx rWORD6, 0, rSTR2
+ addi rSTR1, rSTR1, 4
+ addi rSTR2, rSTR2, 4
+#else
lwz rWORD5, 12(rSTR1)
lwz rWORD6, 12(rSTR2)
+#endif
cmplw cr5, rWORD7, rWORD8
- bne cr0, L(dLcr0)
+ bne cr7, L(dLcr7)
L(dLoop3):
+#ifdef __LITTLE_ENDIAN__
+ lwbrx rWORD7, 0, rSTR1
+ lwbrx rWORD8, 0, rSTR2
+ addi rSTR1, rSTR1, 4
+ addi rSTR2, rSTR2, 4
+#else
lwzu rWORD7, 16(rSTR1)
lwzu rWORD8, 16(rSTR2)
+#endif
bne- cr1, L(dLcr1)
- cmplw cr0, rWORD1, rWORD2
+ cmplw cr7, rWORD1, rWORD2
bdnz+ L(dLoop)
L(dL4):
@@ -325,7 +521,7 @@ L(dL4):
bne cr5, L(dLcr5)
cmplw cr5, rWORD7, rWORD8
L(d44):
- bne cr0, L(dLcr0)
+ bne cr7, L(dLcr7)
L(d34):
bne cr1, L(dLcr1)
L(d24):
@@ -334,69 +530,82 @@ L(d14):
slwi. r12, rN, 3
bne cr5, L(dLcr5)
L(d04):
- lwz r30,44(1)
- lwz r31,48(1)
- lwz 1,0(1)
+ lwz rWORD7, 44(r1)
+ lwz rWORD8, 48(r1)
+ addi 1, 1, 64
+ cfi_adjust_cfa_offset(-64)
subfic rN, r12, 32 /* Shift count is 32 - (rN * 8). */
beq L(zeroLength)
/* At this point we have a remainder of 1 to 3 bytes to compare. Since
we are aligned it is safe to load the whole word, and use
- shift right to eliminate bits beyond the compare length. */
+ shift right to eliminate bits beyond the compare length. */
L(d00):
+#ifdef __LITTLE_ENDIAN__
+ lwbrx rWORD1, 0, rSTR1
+ lwbrx rWORD2, 0, rSTR2
+ addi rSTR1, rSTR1, 4
+ addi rSTR2, rSTR2, 4
+#else
lwz rWORD1, 4(rSTR1)
lwz rWORD2, 4(rSTR2)
+#endif
srw rWORD1, rWORD1, rN
srw rWORD2, rWORD2, rN
- cmplw rWORD1,rWORD2
- li rRTN,0
- beqlr
- li rRTN,1
- bgtlr
- li rRTN,-1
- blr
-
- .align 4
-L(dLcr0):
- lwz r30,44(1)
- lwz r31,48(1)
+ sub rRTN, rWORD1, rWORD2
+ blr
+
+ .align 4
+ cfi_adjust_cfa_offset(64)
+L(dLcr7):
+ lwz rWORD7, 44(r1)
+ lwz rWORD8, 48(r1)
+L(dLcr7x):
li rRTN, 1
- lwz 1,0(1)
- bgtlr cr0
+ addi 1, 1, 64
+ cfi_adjust_cfa_offset(-64)
+ bgtlr cr7
li rRTN, -1
blr
- .align 4
+ .align 4
+ cfi_adjust_cfa_offset(64)
L(dLcr1):
- lwz r30,44(1)
- lwz r31,48(1)
+ lwz rWORD7, 44(r1)
+ lwz rWORD8, 48(r1)
+L(dLcr1x):
li rRTN, 1
- lwz 1,0(1)
+ addi 1, 1, 64
+ cfi_adjust_cfa_offset(-64)
bgtlr cr1
li rRTN, -1
blr
- .align 4
+ .align 4
+ cfi_adjust_cfa_offset(64)
L(dLcr6):
- lwz r30,44(1)
- lwz r31,48(1)
+ lwz rWORD7, 44(r1)
+ lwz rWORD8, 48(r1)
+L(dLcr6x):
li rRTN, 1
- lwz 1,0(1)
+ addi 1, 1, 64
+ cfi_adjust_cfa_offset(-64)
bgtlr cr6
li rRTN, -1
blr
- .align 4
+ .align 4
+ cfi_adjust_cfa_offset(64)
L(dLcr5):
- lwz r30,44(1)
- lwz r31,48(1)
+ lwz rWORD7, 44(r1)
+ lwz rWORD8, 48(r1)
L(dLcr5x):
li rRTN, 1
- lwz 1,0(1)
+ addi 1, 1, 64
+ cfi_adjust_cfa_offset(-64)
bgtlr cr5
li rRTN, -1
blr
- .align 4
+ .align 4
L(bytealigned):
- cfi_adjust_cfa_offset(-64)
- mtctr rN /* Power4 wants mtctr 1st in dispatch group */
+ mtctr rN /* Power4 wants mtctr 1st in dispatch group */
/* We need to prime this loop. This loop is swing modulo scheduled
to avoid pipe delays. The dependent instruction latencies (load to
@@ -411,7 +620,7 @@ L(bytealigned):
lbz rWORD1, 0(rSTR1)
lbz rWORD2, 0(rSTR2)
bdz- L(b11)
- cmplw cr0, rWORD1, rWORD2
+ cmplw cr7, rWORD1, rWORD2
lbz rWORD3, 1(rSTR1)
lbz rWORD4, 1(rSTR2)
bdz- L(b12)
@@ -419,11 +628,11 @@ L(bytealigned):
lbzu rWORD5, 2(rSTR1)
lbzu rWORD6, 2(rSTR2)
bdz- L(b13)
- .align 4
+ .align 4
L(bLoop):
lbzu rWORD1, 1(rSTR1)
lbzu rWORD2, 1(rSTR2)
- bne- cr0, L(bLcr0)
+ bne- cr7, L(bLcr7)
cmplw cr6, rWORD5, rWORD6
bdz- L(b3i)
@@ -432,7 +641,7 @@ L(bLoop):
lbzu rWORD4, 1(rSTR2)
bne- cr1, L(bLcr1)
- cmplw cr0, rWORD1, rWORD2
+ cmplw cr7, rWORD1, rWORD2
bdz- L(b2i)
lbzu rWORD5, 1(rSTR1)
@@ -449,23 +658,23 @@ L(bLoop):
tested. In this case we must complete the pending operations
before returning. */
L(b1i):
- bne- cr0, L(bLcr0)
+ bne- cr7, L(bLcr7)
bne- cr1, L(bLcr1)
b L(bx56)
- .align 4
+ .align 4
L(b2i):
bne- cr6, L(bLcr6)
- bne- cr0, L(bLcr0)
+ bne- cr7, L(bLcr7)
b L(bx34)
- .align 4
+ .align 4
L(b3i):
bne- cr1, L(bLcr1)
bne- cr6, L(bLcr6)
b L(bx12)
- .align 4
-L(bLcr0):
+ .align 4
+L(bLcr7):
li rRTN, 1
- bgtlr cr0
+ bgtlr cr7
li rRTN, -1
blr
L(bLcr1):
@@ -480,36 +689,31 @@ L(bLcr6):
blr
L(b13):
- bne- cr0, L(bx12)
+ bne- cr7, L(bx12)
bne- cr1, L(bx34)
L(bx56):
sub rRTN, rWORD5, rWORD6
blr
nop
L(b12):
- bne- cr0, L(bx12)
+ bne- cr7, L(bx12)
L(bx34):
sub rRTN, rWORD3, rWORD4
blr
-
L(b11):
L(bx12):
sub rRTN, rWORD1, rWORD2
blr
-
- .align 4
-L(zeroLengthReturn):
-
+ .align 4
L(zeroLength):
li rRTN, 0
blr
- cfi_adjust_cfa_offset(64)
- .align 4
+ .align 4
/* At this point we know the strings have different alignment and the
- compare length is at least 8 bytes. rBITDIF contains the low order
+ compare length is at least 8 bytes. r12 contains the low order
2 bits of rSTR1 and cr5 contains the result of the logical compare
- of rBITDIF to 0. If rBITDIF == 0 then rStr1 is word aligned and can
+ of r12 to 0. If r12 == 0 then rStr1 is word aligned and can
perform the Wunaligned loop.
Otherwise we know that rSTR1 is not already word aligned yet.
@@ -518,79 +722,88 @@ L(zeroLength):
eliminate bits preceding the first byte. Since we want to join the
normal (Wualigned) compare loop, starting at the second word,
we need to adjust the length (rN) and special case the loop
- versioning for the first W. This insures that the loop count is
+ versioning for the first W. This ensures that the loop count is
correct and the first W (shifted) is in the expected resister pair. */
#define rSHL r29 /* Unaligned shift left count. */
#define rSHR r28 /* Unaligned shift right count. */
-#define rB r27 /* Left rotation temp for rWORD2. */
-#define rD r26 /* Left rotation temp for rWORD4. */
-#define rF r25 /* Left rotation temp for rWORD6. */
-#define rH r24 /* Left rotation temp for rWORD8. */
-#define rA r0 /* Right rotation temp for rWORD2. */
-#define rC r12 /* Right rotation temp for rWORD4. */
-#define rE r0 /* Right rotation temp for rWORD6. */
-#define rG r12 /* Right rotation temp for rWORD8. */
+#define rWORD8_SHIFT r27 /* Left rotation temp for rWORD2. */
+#define rWORD2_SHIFT r26 /* Left rotation temp for rWORD4. */
+#define rWORD4_SHIFT r25 /* Left rotation temp for rWORD6. */
+#define rWORD6_SHIFT r24 /* Left rotation temp for rWORD8. */
+ cfi_adjust_cfa_offset(64)
L(unaligned):
- stw r29,40(r1)
- cfi_offset(r29,(40-64))
+ stw rSHL, 40(r1)
+ cfi_offset(rSHL, (40-64))
clrlwi rSHL, rSTR2, 30
- stw r28,36(r1)
- cfi_offset(r28,(36-64))
+ stw rSHR, 36(r1)
+ cfi_offset(rSHR, (36-64))
beq cr5, L(Wunaligned)
- stw r27,32(r1)
- cfi_offset(r27,(32-64))
+ stw rWORD8_SHIFT, 32(r1)
+ cfi_offset(rWORD8_SHIFT, (32-64))
/* Adjust the logical start of rSTR2 to compensate for the extra bits
in the 1st rSTR1 W. */
- sub r27, rSTR2, rBITDIF
+ sub rWORD8_SHIFT, rSTR2, r12
/* But do not attempt to address the W before that W that contains
the actual start of rSTR2. */
clrrwi rSTR2, rSTR2, 2
- stw r26,28(r1)
- cfi_offset(r26,(28-64))
-/* Compute the left/right shift counts for the unalign rSTR2,
+ stw rWORD2_SHIFT, 28(r1)
+ cfi_offset(rWORD2_SHIFT, (28-64))
+/* Compute the left/right shift counts for the unaligned rSTR2,
compensating for the logical (W aligned) start of rSTR1. */
- clrlwi rSHL, r27, 30
+ clrlwi rSHL, rWORD8_SHIFT, 30
clrrwi rSTR1, rSTR1, 2
- stw r25,24(r1)
- cfi_offset(r25,(24-64))
+ stw rWORD4_SHIFT, 24(r1)
+ cfi_offset(rWORD4_SHIFT, (24-64))
slwi rSHL, rSHL, 3
- cmplw cr5, r27, rSTR2
- add rN, rN, rBITDIF
- slwi r11, rBITDIF, 3
- stw r24,20(r1)
- cfi_offset(r24,(20-64))
+ cmplw cr5, rWORD8_SHIFT, rSTR2
+ add rN, rN, r12
+ slwi rWORD6, r12, 3
+ stw rWORD6_SHIFT, 20(r1)
+ cfi_offset(rWORD6_SHIFT, (20-64))
subfic rSHR, rSHL, 32
- srwi rTMP, rN, 4 /* Divide by 16 */
- andi. rBITDIF, rN, 12 /* Get the W remainder */
+ srwi r0, rN, 4 /* Divide by 16 */
+ andi. r12, rN, 12 /* Get the W remainder */
/* We normally need to load 2 Ws to start the unaligned rSTR2, but in
this special case those bits may be discarded anyway. Also we
must avoid loading a W where none of the bits are part of rSTR2 as
this may cross a page boundary and cause a page fault. */
li rWORD8, 0
blt cr5, L(dus0)
+#ifdef __LITTLE_ENDIAN__
+ lwbrx rWORD8, 0, rSTR2
+ addi rSTR2, rSTR2, 4
+#else
lwz rWORD8, 0(rSTR2)
- la rSTR2, 4(rSTR2)
+ addi rSTR2, rSTR2, 4
+#endif
slw rWORD8, rWORD8, rSHL
L(dus0):
+#ifdef __LITTLE_ENDIAN__
+ lwbrx rWORD1, 0, rSTR1
+ lwbrx rWORD2, 0, rSTR2
+ addi rSTR1, rSTR1, 4
+ addi rSTR2, rSTR2, 4
+#else
lwz rWORD1, 0(rSTR1)
lwz rWORD2, 0(rSTR2)
- cmplwi cr1, rBITDIF, 8
+#endif
+ cmplwi cr1, r12, 8
cmplwi cr7, rN, 16
- srw rG, rWORD2, rSHR
+ srw r12, rWORD2, rSHR
clrlwi rN, rN, 30
beq L(duPs4)
- mtctr rTMP /* Power4 wants mtctr 1st in dispatch group */
- or rWORD8, rG, rWORD8
+ mtctr r0 /* Power4 wants mtctr 1st in dispatch group */
+ or rWORD8, r12, rWORD8
bgt cr1, L(duPs3)
beq cr1, L(duPs2)
/* Remainder is 4 */
- .align 4
+ .align 4
L(dusP1):
- slw rB, rWORD2, rSHL
- slw rWORD7, rWORD1, r11
- slw rWORD8, rWORD8, r11
+ slw rWORD8_SHIFT, rWORD2, rSHL
+ slw rWORD7, rWORD1, rWORD6
+ slw rWORD8, rWORD8, rWORD6
bge cr7, L(duP1e)
/* At this point we exit early with the first word compare
complete and remainder of 0 to 3 bytes. See L(du14) for details on
@@ -600,95 +813,133 @@ L(dusP1):
bne cr5, L(duLcr5)
cmplw cr7, rN, rSHR
beq L(duZeroReturn)
- li rA, 0
+ li r0, 0
ble cr7, L(dutrim)
+#ifdef __LITTLE_ENDIAN__
+ lwbrx rWORD2, 0, rSTR2
+ addi rSTR2, rSTR2, 4
+#else
lwz rWORD2, 4(rSTR2)
- srw rA, rWORD2, rSHR
+#endif
+ srw r0, rWORD2, rSHR
b L(dutrim)
/* Remainder is 8 */
- .align 4
+ .align 4
L(duPs2):
- slw rH, rWORD2, rSHL
- slw rWORD5, rWORD1, r11
- slw rWORD6, rWORD8, r11
+ slw rWORD6_SHIFT, rWORD2, rSHL
+ slw rWORD5, rWORD1, rWORD6
+ slw rWORD6, rWORD8, rWORD6
b L(duP2e)
/* Remainder is 12 */
- .align 4
+ .align 4
L(duPs3):
- slw rF, rWORD2, rSHL
- slw rWORD3, rWORD1, r11
- slw rWORD4, rWORD8, r11
+ slw rWORD4_SHIFT, rWORD2, rSHL
+ slw rWORD3, rWORD1, rWORD6
+ slw rWORD4, rWORD8, rWORD6
b L(duP3e)
/* Count is a multiple of 16, remainder is 0 */
- .align 4
+ .align 4
L(duPs4):
- mtctr rTMP /* Power4 wants mtctr 1st in dispatch group */
- or rWORD8, rG, rWORD8
- slw rD, rWORD2, rSHL
- slw rWORD1, rWORD1, r11
- slw rWORD2, rWORD8, r11
+ mtctr r0 /* Power4 wants mtctr 1st in dispatch group */
+ or rWORD8, r12, rWORD8
+ slw rWORD2_SHIFT, rWORD2, rSHL
+ slw rWORD1, rWORD1, rWORD6
+ slw rWORD2, rWORD8, rWORD6
b L(duP4e)
/* At this point we know rSTR1 is word aligned and the
compare length is at least 8 bytes. */
- .align 4
+ .align 4
L(Wunaligned):
- stw r27,32(r1)
- cfi_offset(r27,(32-64))
+ stw rWORD8_SHIFT, 32(r1)
+ cfi_offset(rWORD8_SHIFT, (32-64))
clrrwi rSTR2, rSTR2, 2
- stw r26,28(r1)
- cfi_offset(r26,(28-64))
- srwi rTMP, rN, 4 /* Divide by 16 */
- stw r25,24(r1)
- cfi_offset(r25,(24-64))
- andi. rBITDIF, rN, 12 /* Get the W remainder */
- stw r24,20(r1)
- cfi_offset(r24,(20-64))
+ stw rWORD2_SHIFT, 28(r1)
+ cfi_offset(rWORD2_SHIFT, (28-64))
+ srwi r0, rN, 4 /* Divide by 16 */
+ stw rWORD4_SHIFT, 24(r1)
+ cfi_offset(rWORD4_SHIFT, (24-64))
+ andi. r12, rN, 12 /* Get the W remainder */
+ stw rWORD6_SHIFT, 20(r1)
+ cfi_offset(rWORD6_SHIFT, (20-64))
slwi rSHL, rSHL, 3
+#ifdef __LITTLE_ENDIAN__
+ lwbrx rWORD6, 0, rSTR2
+ addi rSTR2, rSTR2, 4
+ lwbrx rWORD8, 0, rSTR2
+ addi rSTR2, rSTR2, 4
+#else
lwz rWORD6, 0(rSTR2)
lwzu rWORD8, 4(rSTR2)
- cmplwi cr1, rBITDIF, 8
+#endif
+ cmplwi cr1, r12, 8
cmplwi cr7, rN, 16
clrlwi rN, rN, 30
subfic rSHR, rSHL, 32
- slw rH, rWORD6, rSHL
+ slw rWORD6_SHIFT, rWORD6, rSHL
beq L(duP4)
- mtctr rTMP /* Power4 wants mtctr 1st in dispatch group */
+ mtctr r0 /* Power4 wants mtctr 1st in dispatch group */
bgt cr1, L(duP3)
beq cr1, L(duP2)
/* Remainder is 4 */
- .align 4
+ .align 4
L(duP1):
- srw rG, rWORD8, rSHR
+ srw r12, rWORD8, rSHR
+#ifdef __LITTLE_ENDIAN__
+ lwbrx rWORD7, 0, rSTR1
+ addi rSTR1, rSTR1, 4
+#else
lwz rWORD7, 0(rSTR1)
- slw rB, rWORD8, rSHL
- or rWORD8, rG, rH
+#endif
+ slw rWORD8_SHIFT, rWORD8, rSHL
+ or rWORD8, r12, rWORD6_SHIFT
blt cr7, L(duP1x)
L(duP1e):
+#ifdef __LITTLE_ENDIAN__
+ lwbrx rWORD1, 0, rSTR1
+ lwbrx rWORD2, 0, rSTR2
+ addi rSTR1, rSTR1, 4
+ addi rSTR2, rSTR2, 4
+#else
lwz rWORD1, 4(rSTR1)
lwz rWORD2, 4(rSTR2)
+#endif
cmplw cr5, rWORD7, rWORD8
- srw rA, rWORD2, rSHR
- slw rD, rWORD2, rSHL
- or rWORD2, rA, rB
+ srw r0, rWORD2, rSHR
+ slw rWORD2_SHIFT, rWORD2, rSHL
+ or rWORD2, r0, rWORD8_SHIFT
+#ifdef __LITTLE_ENDIAN__
+ lwbrx rWORD3, 0, rSTR1
+ lwbrx rWORD4, 0, rSTR2
+ addi rSTR1, rSTR1, 4
+ addi rSTR2, rSTR2, 4
+#else
lwz rWORD3, 8(rSTR1)
lwz rWORD4, 8(rSTR2)
- cmplw cr0, rWORD1, rWORD2
- srw rC, rWORD4, rSHR
- slw rF, rWORD4, rSHL
+#endif
+ cmplw cr7, rWORD1, rWORD2
+ srw r12, rWORD4, rSHR
+ slw rWORD4_SHIFT, rWORD4, rSHL
bne cr5, L(duLcr5)
- or rWORD4, rC, rD
+ or rWORD4, r12, rWORD2_SHIFT
+#ifdef __LITTLE_ENDIAN__
+ lwbrx rWORD5, 0, rSTR1
+ lwbrx rWORD6, 0, rSTR2
+ addi rSTR1, rSTR1, 4
+ addi rSTR2, rSTR2, 4
+#else
lwz rWORD5, 12(rSTR1)
lwz rWORD6, 12(rSTR2)
+#endif
cmplw cr1, rWORD3, rWORD4
- srw rE, rWORD6, rSHR
- slw rH, rWORD6, rSHL
- bne cr0, L(duLcr0)
- or rWORD6, rE, rF
+ srw r0, rWORD6, rSHR
+ slw rWORD6_SHIFT, rWORD6, rSHL
+ bne cr7, L(duLcr7)
+ or rWORD6, r0, rWORD4_SHIFT
cmplw cr6, rWORD5, rWORD6
b L(duLoop3)
- .align 4
+ .align 4
/* At this point we exit early with the first word compare
complete and remainder of 0 to 3 bytes. See L(du14) for details on
how we handle the remaining bytes. */
@@ -698,186 +949,321 @@ L(duP1x):
bne cr5, L(duLcr5)
cmplw cr7, rN, rSHR
beq L(duZeroReturn)
- li rA, 0
+ li r0, 0
ble cr7, L(dutrim)
- ld rWORD2, 8(rSTR2)
- srw rA, rWORD2, rSHR
+#ifdef __LITTLE_ENDIAN__
+ lwbrx rWORD2, 0, rSTR2
+ addi rSTR2, rSTR2, 4
+#else
+ lwz rWORD2, 8(rSTR2)
+#endif
+ srw r0, rWORD2, rSHR
b L(dutrim)
/* Remainder is 8 */
- .align 4
+ .align 4
L(duP2):
- srw rE, rWORD8, rSHR
+ srw r0, rWORD8, rSHR
+#ifdef __LITTLE_ENDIAN__
+ lwbrx rWORD5, 0, rSTR1
+ addi rSTR1, rSTR1, 4
+#else
lwz rWORD5, 0(rSTR1)
- or rWORD6, rE, rH
- slw rH, rWORD8, rSHL
+#endif
+ or rWORD6, r0, rWORD6_SHIFT
+ slw rWORD6_SHIFT, rWORD8, rSHL
L(duP2e):
+#ifdef __LITTLE_ENDIAN__
+ lwbrx rWORD7, 0, rSTR1
+ lwbrx rWORD8, 0, rSTR2
+ addi rSTR1, rSTR1, 4
+ addi rSTR2, rSTR2, 4
+#else
lwz rWORD7, 4(rSTR1)
lwz rWORD8, 4(rSTR2)
+#endif
cmplw cr6, rWORD5, rWORD6
- srw rG, rWORD8, rSHR
- slw rB, rWORD8, rSHL
- or rWORD8, rG, rH
+ srw r12, rWORD8, rSHR
+ slw rWORD8_SHIFT, rWORD8, rSHL
+ or rWORD8, r12, rWORD6_SHIFT
blt cr7, L(duP2x)
+#ifdef __LITTLE_ENDIAN__
+ lwbrx rWORD1, 0, rSTR1
+ lwbrx rWORD2, 0, rSTR2
+ addi rSTR1, rSTR1, 4
+ addi rSTR2, rSTR2, 4
+#else
lwz rWORD1, 8(rSTR1)
lwz rWORD2, 8(rSTR2)
+#endif
cmplw cr5, rWORD7, rWORD8
bne cr6, L(duLcr6)
- srw rA, rWORD2, rSHR
- slw rD, rWORD2, rSHL
- or rWORD2, rA, rB
+ srw r0, rWORD2, rSHR
+ slw rWORD2_SHIFT, rWORD2, rSHL
+ or rWORD2, r0, rWORD8_SHIFT
+#ifdef __LITTLE_ENDIAN__
+ lwbrx rWORD3, 0, rSTR1
+ lwbrx rWORD4, 0, rSTR2
+ addi rSTR1, rSTR1, 4
+ addi rSTR2, rSTR2, 4
+#else
lwz rWORD3, 12(rSTR1)
lwz rWORD4, 12(rSTR2)
- cmplw cr0, rWORD1, rWORD2
+#endif
+ cmplw cr7, rWORD1, rWORD2
bne cr5, L(duLcr5)
- srw rC, rWORD4, rSHR
- slw rF, rWORD4, rSHL
- or rWORD4, rC, rD
+ srw r12, rWORD4, rSHR
+ slw rWORD4_SHIFT, rWORD4, rSHL
+ or rWORD4, r12, rWORD2_SHIFT
+#ifndef __LITTLE_ENDIAN__
addi rSTR1, rSTR1, 4
addi rSTR2, rSTR2, 4
+#endif
cmplw cr1, rWORD3, rWORD4
b L(duLoop2)
- .align 4
+ .align 4
L(duP2x):
cmplw cr5, rWORD7, rWORD8
+#ifndef __LITTLE_ENDIAN__
addi rSTR1, rSTR1, 4
addi rSTR2, rSTR2, 4
+#endif
bne cr6, L(duLcr6)
slwi. rN, rN, 3
bne cr5, L(duLcr5)
cmplw cr7, rN, rSHR
beq L(duZeroReturn)
- li rA, 0
+ li r0, 0
ble cr7, L(dutrim)
+#ifdef __LITTLE_ENDIAN__
+ lwbrx rWORD2, 0, rSTR2
+ addi rSTR2, rSTR2, 4
+#else
lwz rWORD2, 4(rSTR2)
- srw rA, rWORD2, rSHR
+#endif
+ srw r0, rWORD2, rSHR
b L(dutrim)
/* Remainder is 12 */
- .align 4
+ .align 4
L(duP3):
- srw rC, rWORD8, rSHR
+ srw r12, rWORD8, rSHR
+#ifdef __LITTLE_ENDIAN__
+ lwbrx rWORD3, 0, rSTR1
+ addi rSTR1, rSTR1, 4
+#else
lwz rWORD3, 0(rSTR1)
- slw rF, rWORD8, rSHL
- or rWORD4, rC, rH
+#endif
+ slw rWORD4_SHIFT, rWORD8, rSHL
+ or rWORD4, r12, rWORD6_SHIFT
L(duP3e):
+#ifdef __LITTLE_ENDIAN__
+ lwbrx rWORD5, 0, rSTR1
+ lwbrx rWORD6, 0, rSTR2
+ addi rSTR1, rSTR1, 4
+ addi rSTR2, rSTR2, 4
+#else
lwz rWORD5, 4(rSTR1)
lwz rWORD6, 4(rSTR2)
+#endif
cmplw cr1, rWORD3, rWORD4
- srw rE, rWORD6, rSHR
- slw rH, rWORD6, rSHL
- or rWORD6, rE, rF
+ srw r0, rWORD6, rSHR
+ slw rWORD6_SHIFT, rWORD6, rSHL
+ or rWORD6, r0, rWORD4_SHIFT
+#ifdef __LITTLE_ENDIAN__
+ lwbrx rWORD7, 0, rSTR1
+ lwbrx rWORD8, 0, rSTR2
+ addi rSTR1, rSTR1, 4
+ addi rSTR2, rSTR2, 4
+#else
lwz rWORD7, 8(rSTR1)
lwz rWORD8, 8(rSTR2)
+#endif
cmplw cr6, rWORD5, rWORD6
bne cr1, L(duLcr1)
- srw rG, rWORD8, rSHR
- slw rB, rWORD8, rSHL
- or rWORD8, rG, rH
+ srw r12, rWORD8, rSHR
+ slw rWORD8_SHIFT, rWORD8, rSHL
+ or rWORD8, r12, rWORD6_SHIFT
blt cr7, L(duP3x)
+#ifdef __LITTLE_ENDIAN__
+ lwbrx rWORD1, 0, rSTR1
+ lwbrx rWORD2, 0, rSTR2
+ addi rSTR1, rSTR1, 4
+ addi rSTR2, rSTR2, 4
+#else
lwz rWORD1, 12(rSTR1)
lwz rWORD2, 12(rSTR2)
+#endif
cmplw cr5, rWORD7, rWORD8
bne cr6, L(duLcr6)
- srw rA, rWORD2, rSHR
- slw rD, rWORD2, rSHL
- or rWORD2, rA, rB
+ srw r0, rWORD2, rSHR
+ slw rWORD2_SHIFT, rWORD2, rSHL
+ or rWORD2, r0, rWORD8_SHIFT
+#ifndef __LITTLE_ENDIAN__
addi rSTR1, rSTR1, 8
addi rSTR2, rSTR2, 8
- cmplw cr0, rWORD1, rWORD2
+#endif
+ cmplw cr7, rWORD1, rWORD2
b L(duLoop1)
- .align 4
+ .align 4
L(duP3x):
+#ifndef __LITTLE_ENDIAN__
addi rSTR1, rSTR1, 8
addi rSTR2, rSTR2, 8
+#endif
+#if 0
+/* Huh? We've already branched on cr1! */
bne cr1, L(duLcr1)
+#endif
cmplw cr5, rWORD7, rWORD8
bne cr6, L(duLcr6)
slwi. rN, rN, 3
bne cr5, L(duLcr5)
cmplw cr7, rN, rSHR
beq L(duZeroReturn)
- li rA, 0
+ li r0, 0
ble cr7, L(dutrim)
+#ifdef __LITTLE_ENDIAN__
+ lwbrx rWORD2, 0, rSTR2
+ addi rSTR2, rSTR2, 4
+#else
lwz rWORD2, 4(rSTR2)
- srw rA, rWORD2, rSHR
+#endif
+ srw r0, rWORD2, rSHR
b L(dutrim)
/* Count is a multiple of 16, remainder is 0 */
- .align 4
+ .align 4
L(duP4):
- mtctr rTMP /* Power4 wants mtctr 1st in dispatch group */
- srw rA, rWORD8, rSHR
+ mtctr r0 /* Power4 wants mtctr 1st in dispatch group */
+ srw r0, rWORD8, rSHR
+#ifdef __LITTLE_ENDIAN__
+ lwbrx rWORD1, 0, rSTR1
+ addi rSTR1, rSTR1, 4
+#else
lwz rWORD1, 0(rSTR1)
- slw rD, rWORD8, rSHL
- or rWORD2, rA, rH
+#endif
+ slw rWORD2_SHIFT, rWORD8, rSHL
+ or rWORD2, r0, rWORD6_SHIFT
L(duP4e):
+#ifdef __LITTLE_ENDIAN__
+ lwbrx rWORD3, 0, rSTR1
+ lwbrx rWORD4, 0, rSTR2
+ addi rSTR1, rSTR1, 4
+ addi rSTR2, rSTR2, 4
+#else
lwz rWORD3, 4(rSTR1)
lwz rWORD4, 4(rSTR2)
- cmplw cr0, rWORD1, rWORD2
- srw rC, rWORD4, rSHR
- slw rF, rWORD4, rSHL
- or rWORD4, rC, rD
+#endif
+ cmplw cr7, rWORD1, rWORD2
+ srw r12, rWORD4, rSHR
+ slw rWORD4_SHIFT, rWORD4, rSHL
+ or rWORD4, r12, rWORD2_SHIFT
+#ifdef __LITTLE_ENDIAN__
+ lwbrx rWORD5, 0, rSTR1
+ lwbrx rWORD6, 0, rSTR2
+ addi rSTR1, rSTR1, 4
+ addi rSTR2, rSTR2, 4
+#else
lwz rWORD5, 8(rSTR1)
lwz rWORD6, 8(rSTR2)
+#endif
cmplw cr1, rWORD3, rWORD4
- bne cr0, L(duLcr0)
- srw rE, rWORD6, rSHR
- slw rH, rWORD6, rSHL
- or rWORD6, rE, rF
+ bne cr7, L(duLcr7)
+ srw r0, rWORD6, rSHR
+ slw rWORD6_SHIFT, rWORD6, rSHL
+ or rWORD6, r0, rWORD4_SHIFT
+#ifdef __LITTLE_ENDIAN__
+ lwbrx rWORD7, 0, rSTR1
+ lwbrx rWORD8, 0, rSTR2
+ addi rSTR1, rSTR1, 4
+ addi rSTR2, rSTR2, 4
+#else
lwzu rWORD7, 12(rSTR1)
lwzu rWORD8, 12(rSTR2)
+#endif
cmplw cr6, rWORD5, rWORD6
bne cr1, L(duLcr1)
- srw rG, rWORD8, rSHR
- slw rB, rWORD8, rSHL
- or rWORD8, rG, rH
+ srw r12, rWORD8, rSHR
+ slw rWORD8_SHIFT, rWORD8, rSHL
+ or rWORD8, r12, rWORD6_SHIFT
cmplw cr5, rWORD7, rWORD8
bdz- L(du24) /* Adjust CTR as we start with +4 */
/* This is the primary loop */
- .align 4
+ .align 4
L(duLoop):
+#ifdef __LITTLE_ENDIAN__
+ lwbrx rWORD1, 0, rSTR1
+ lwbrx rWORD2, 0, rSTR2
+ addi rSTR1, rSTR1, 4
+ addi rSTR2, rSTR2, 4
+#else
lwz rWORD1, 4(rSTR1)
lwz rWORD2, 4(rSTR2)
+#endif
cmplw cr1, rWORD3, rWORD4
bne cr6, L(duLcr6)
- srw rA, rWORD2, rSHR
- slw rD, rWORD2, rSHL
- or rWORD2, rA, rB
+ srw r0, rWORD2, rSHR
+ slw rWORD2_SHIFT, rWORD2, rSHL
+ or rWORD2, r0, rWORD8_SHIFT
L(duLoop1):
+#ifdef __LITTLE_ENDIAN__
+ lwbrx rWORD3, 0, rSTR1
+ lwbrx rWORD4, 0, rSTR2
+ addi rSTR1, rSTR1, 4
+ addi rSTR2, rSTR2, 4
+#else
lwz rWORD3, 8(rSTR1)
lwz rWORD4, 8(rSTR2)
+#endif
cmplw cr6, rWORD5, rWORD6
bne cr5, L(duLcr5)
- srw rC, rWORD4, rSHR
- slw rF, rWORD4, rSHL
- or rWORD4, rC, rD
+ srw r12, rWORD4, rSHR
+ slw rWORD4_SHIFT, rWORD4, rSHL
+ or rWORD4, r12, rWORD2_SHIFT
L(duLoop2):
+#ifdef __LITTLE_ENDIAN__
+ lwbrx rWORD5, 0, rSTR1
+ lwbrx rWORD6, 0, rSTR2
+ addi rSTR1, rSTR1, 4
+ addi rSTR2, rSTR2, 4
+#else
lwz rWORD5, 12(rSTR1)
lwz rWORD6, 12(rSTR2)
+#endif
cmplw cr5, rWORD7, rWORD8
- bne cr0, L(duLcr0)
- srw rE, rWORD6, rSHR
- slw rH, rWORD6, rSHL
- or rWORD6, rE, rF
+ bne cr7, L(duLcr7)
+ srw r0, rWORD6, rSHR
+ slw rWORD6_SHIFT, rWORD6, rSHL
+ or rWORD6, r0, rWORD4_SHIFT
L(duLoop3):
+#ifdef __LITTLE_ENDIAN__
+ lwbrx rWORD7, 0, rSTR1
+ lwbrx rWORD8, 0, rSTR2
+ addi rSTR1, rSTR1, 4
+ addi rSTR2, rSTR2, 4
+#else
lwzu rWORD7, 16(rSTR1)
lwzu rWORD8, 16(rSTR2)
- cmplw cr0, rWORD1, rWORD2
+#endif
+ cmplw cr7, rWORD1, rWORD2
bne- cr1, L(duLcr1)
- srw rG, rWORD8, rSHR
- slw rB, rWORD8, rSHL
- or rWORD8, rG, rH
+ srw r12, rWORD8, rSHR
+ slw rWORD8_SHIFT, rWORD8, rSHL
+ or rWORD8, r12, rWORD6_SHIFT
bdnz+ L(duLoop)
L(duL4):
+#if 0
+/* Huh? We've already branched on cr1! */
bne cr1, L(duLcr1)
+#endif
cmplw cr1, rWORD3, rWORD4
bne cr6, L(duLcr6)
cmplw cr6, rWORD5, rWORD6
bne cr5, L(duLcr5)
cmplw cr5, rWORD7, rWORD8
L(du44):
- bne cr0, L(duLcr0)
+ bne cr7, L(duLcr7)
L(du34):
bne cr1, L(duLcr1)
L(du24):
@@ -887,95 +1273,101 @@ L(du14):
bne cr5, L(duLcr5)
/* At this point we have a remainder of 1 to 3 bytes to compare. We use
shift right to eliminate bits beyond the compare length.
+ This allows the use of word subtract to compute the final result.
However it may not be safe to load rWORD2 which may be beyond the
string length. So we compare the bit length of the remainder to
the right shift count (rSHR). If the bit count is less than or equal
we do not need to load rWORD2 (all significant bits are already in
- rB). */
+ rWORD8_SHIFT). */
cmplw cr7, rN, rSHR
beq L(duZeroReturn)
- li rA, 0
+ li r0, 0
ble cr7, L(dutrim)
+#ifdef __LITTLE_ENDIAN__
+ lwbrx rWORD2, 0, rSTR2
+ addi rSTR2, rSTR2, 4
+#else
lwz rWORD2, 4(rSTR2)
- srw rA, rWORD2, rSHR
- .align 4
+#endif
+ srw r0, rWORD2, rSHR
+ .align 4
L(dutrim):
+#ifdef __LITTLE_ENDIAN__
+ lwbrx rWORD1, 0, rSTR1
+#else
lwz rWORD1, 4(rSTR1)
- lwz r31,48(1)
+#endif
+ lwz rWORD8, 48(r1)
subfic rN, rN, 32 /* Shift count is 32 - (rN * 8). */
- or rWORD2, rA, rB
- lwz r30,44(1)
- lwz r29,40(r1)
+ or rWORD2, r0, rWORD8_SHIFT
+ lwz rWORD7, 44(r1)
+ lwz rSHL, 40(r1)
srw rWORD1, rWORD1, rN
srw rWORD2, rWORD2, rN
- lwz r28,36(r1)
- lwz r27,32(r1)
- cmplw rWORD1,rWORD2
- li rRTN,0
- beq L(dureturn26)
- li rRTN,1
- bgt L(dureturn26)
- li rRTN,-1
- b L(dureturn26)
- .align 4
-L(duLcr0):
- lwz r31,48(1)
- lwz r30,44(1)
+ lwz rSHR, 36(r1)
+ lwz rWORD8_SHIFT, 32(r1)
+ sub rRTN, rWORD1, rWORD2
+ b L(dureturn26)
+ .align 4
+L(duLcr7):
+ lwz rWORD8, 48(r1)
+ lwz rWORD7, 44(r1)
li rRTN, 1
- bgt cr0, L(dureturn29)
- lwz r29,40(r1)
- lwz r28,36(r1)
+ bgt cr7, L(dureturn29)
+ lwz rSHL, 40(r1)
+ lwz rSHR, 36(r1)
li rRTN, -1
b L(dureturn27)
- .align 4
+ .align 4
L(duLcr1):
- lwz r31,48(1)
- lwz r30,44(1)
+ lwz rWORD8, 48(r1)
+ lwz rWORD7, 44(r1)
li rRTN, 1
bgt cr1, L(dureturn29)
- lwz r29,40(r1)
- lwz r28,36(r1)
+ lwz rSHL, 40(r1)
+ lwz rSHR, 36(r1)
li rRTN, -1
b L(dureturn27)
- .align 4
+ .align 4
L(duLcr6):
- lwz r31,48(1)
- lwz r30,44(1)
+ lwz rWORD8, 48(r1)
+ lwz rWORD7, 44(r1)
li rRTN, 1
bgt cr6, L(dureturn29)
- lwz r29,40(r1)
- lwz r28,36(r1)
+ lwz rSHL, 40(r1)
+ lwz rSHR, 36(r1)
li rRTN, -1
b L(dureturn27)
- .align 4
+ .align 4
L(duLcr5):
- lwz r31,48(1)
- lwz r30,44(1)
+ lwz rWORD8, 48(r1)
+ lwz rWORD7, 44(r1)
li rRTN, 1
bgt cr5, L(dureturn29)
- lwz r29,40(r1)
- lwz r28,36(r1)
+ lwz rSHL, 40(r1)
+ lwz rSHR, 36(r1)
li rRTN, -1
b L(dureturn27)
.align 3
L(duZeroReturn):
- li rRTN,0
+ li rRTN, 0
.align 4
L(dureturn):
- lwz r31,48(1)
- lwz r30,44(1)
+ lwz rWORD8, 48(r1)
+ lwz rWORD7, 44(r1)
L(dureturn29):
- lwz r29,40(r1)
- lwz r28,36(r1)
+ lwz rSHL, 40(r1)
+ lwz rSHR, 36(r1)
L(dureturn27):
- lwz r27,32(r1)
+ lwz rWORD8_SHIFT, 32(r1)
L(dureturn26):
- lwz r26,28(r1)
+ lwz rWORD2_SHIFT, 28(r1)
L(dureturn25):
- lwz r25,24(r1)
- lwz r24,20(r1)
- lwz 1,0(1)
+ lwz rWORD4_SHIFT, 24(r1)
+ lwz rWORD6_SHIFT, 20(r1)
+ addi 1, 1, 64
+ cfi_adjust_cfa_offset(-64)
blr
END (memcmp)
diff --git a/sysdeps/powerpc/powerpc32/power7/memcmp.S b/sysdeps/powerpc/powerpc32/power7/memcmp.S
index 075e19f141..f160ddebf6 100644
--- a/sysdeps/powerpc/powerpc32/power7/memcmp.S
+++ b/sysdeps/powerpc/powerpc32/power7/memcmp.S
@@ -23,10 +23,9 @@
size_t size [r5]) */
.machine power7
-EALIGN (memcmp,4,0)
+EALIGN (memcmp, 4, 0)
CALL_MCOUNT
-#define rTMP r0
#define rRTN r3
#define rSTR1 r3 /* first string arg */
#define rSTR2 r4 /* second string arg */
@@ -37,35 +36,32 @@ EALIGN (memcmp,4,0)
#define rWORD4 r9 /* next word in s2 */
#define rWORD5 r10 /* next word in s1 */
#define rWORD6 r11 /* next word in s2 */
-#define rBITDIF r12 /* bits that differ in s1 & s2 words */
#define rWORD7 r30 /* next word in s1 */
#define rWORD8 r31 /* next word in s2 */
- xor rTMP,rSTR2,rSTR1
- cmplwi cr6,rN,0
- cmplwi cr1,rN,12
- clrlwi. rTMP,rTMP,30
- clrlwi rBITDIF,rSTR1,30
- cmplwi cr5,rBITDIF,0
- beq- cr6,L(zeroLength)
- dcbt 0,rSTR1
- dcbt 0,rSTR2
-
- /* If less than 8 bytes or not aligned, use the unaligned
- byte loop. */
-
- blt cr1,L(bytealigned)
- stwu 1,-64(1)
+ xor r0, rSTR2, rSTR1
+ cmplwi cr6, rN, 0
+ cmplwi cr1, rN, 12
+ clrlwi. r0, r0, 30
+ clrlwi r12, rSTR1, 30
+ cmplwi cr5, r12, 0
+ beq- cr6, L(zeroLength)
+ dcbt 0, rSTR1
+ dcbt 0, rSTR2
+/* If less than 8 bytes or not aligned, use the unaligned
+ byte loop. */
+ blt cr1, L(bytealigned)
+ stwu 1, -64(r1)
cfi_adjust_cfa_offset(64)
- stw r31,48(1)
- cfi_offset(31,(48-64))
- stw r30,44(1)
- cfi_offset(30,(44-64))
+ stw rWORD8, 48(r1)
+ cfi_offset(rWORD8, (48-64))
+ stw rWORD7, 44(r1)
+ cfi_offset(rWORD7, (44-64))
bne L(unaligned)
/* At this point we know both strings have the same alignment and the
- compare length is at least 8 bytes. rBITDIF contains the low order
+ compare length is at least 8 bytes. r12 contains the low order
2 bits of rSTR1 and cr5 contains the result of the logical compare
- of rBITDIF to 0. If rBITDIF == 0 then we are already word
+ of r12 to 0. If r12 == 0 then we are already word
aligned and can perform the word aligned loop.
Otherwise we know the two strings have the same alignment (but not
@@ -74,332 +70,541 @@ EALIGN (memcmp,4,0)
eliminate bits preceding the first byte. Since we want to join the
normal (word aligned) compare loop, starting at the second word,
we need to adjust the length (rN) and special case the loop
- versioning for the first word. This insures that the loop count is
+ versioning for the first word. This ensures that the loop count is
correct and the first word (shifted) is in the expected register pair. */
.align 4
L(samealignment):
- clrrwi rSTR1,rSTR1,2
- clrrwi rSTR2,rSTR2,2
- beq cr5,L(Waligned)
- add rN,rN,rBITDIF
- slwi r11,rBITDIF,3
- srwi rTMP,rN,4 /* Divide by 16 */
- andi. rBITDIF,rN,12 /* Get the word remainder */
- lwz rWORD1,0(rSTR1)
- lwz rWORD2,0(rSTR2)
- cmplwi cr1,rBITDIF,8
- cmplwi cr7,rN,16
- clrlwi rN,rN,30
+ clrrwi rSTR1, rSTR1, 2
+ clrrwi rSTR2, rSTR2, 2
+ beq cr5, L(Waligned)
+ add rN, rN, r12
+ slwi rWORD6, r12, 3
+ srwi r0, rN, 4 /* Divide by 16 */
+ andi. r12, rN, 12 /* Get the word remainder */
+#ifdef __LITTLE_ENDIAN__
+ lwbrx rWORD1, 0, rSTR1
+ lwbrx rWORD2, 0, rSTR2
+ addi rSTR1, rSTR1, 4
+ addi rSTR2, rSTR2, 4
+#else
+ lwz rWORD1, 0(rSTR1)
+ lwz rWORD2, 0(rSTR2)
+#endif
+ cmplwi cr1, r12, 8
+ cmplwi cr7, rN, 16
+ clrlwi rN, rN, 30
beq L(dPs4)
- mtctr rTMP
- bgt cr1,L(dPs3)
- beq cr1,L(dPs2)
+ mtctr r0
+ bgt cr1, L(dPs3)
+ beq cr1, L(dPs2)
/* Remainder is 4 */
.align 3
L(dsP1):
- slw rWORD5,rWORD1,r11
- slw rWORD6,rWORD2,r11
- cmplw cr5,rWORD5,rWORD6
- blt cr7,L(dP1x)
+ slw rWORD5, rWORD1, rWORD6
+ slw rWORD6, rWORD2, rWORD6
+ cmplw cr5, rWORD5, rWORD6
+ blt cr7, L(dP1x)
/* Do something useful in this cycle since we have to branch anyway. */
- lwz rWORD1,4(rSTR1)
- lwz rWORD2,4(rSTR2)
- cmplw cr0,rWORD1,rWORD2
+#ifdef __LITTLE_ENDIAN__
+ lwbrx rWORD1, 0, rSTR1
+ lwbrx rWORD2, 0, rSTR2
+ addi rSTR1, rSTR1, 4
+ addi rSTR2, rSTR2, 4
+#else
+ lwz rWORD1, 4(rSTR1)
+ lwz rWORD2, 4(rSTR2)
+#endif
+ cmplw cr7, rWORD1, rWORD2
b L(dP1e)
/* Remainder is 8 */
.align 4
L(dPs2):
- slw rWORD5,rWORD1,r11
- slw rWORD6,rWORD2,r11
- cmplw cr6,rWORD5,rWORD6
- blt cr7,L(dP2x)
+ slw rWORD5, rWORD1, rWORD6
+ slw rWORD6, rWORD2, rWORD6
+ cmplw cr6, rWORD5, rWORD6
+ blt cr7, L(dP2x)
/* Do something useful in this cycle since we have to branch anyway. */
- lwz rWORD7,4(rSTR1)
- lwz rWORD8,4(rSTR2)
- cmplw cr5,rWORD7,rWORD8
+#ifdef __LITTLE_ENDIAN__
+ lwbrx rWORD7, 0, rSTR1
+ lwbrx rWORD8, 0, rSTR2
+ addi rSTR1, rSTR1, 4
+ addi rSTR2, rSTR2, 4
+#else
+ lwz rWORD7, 4(rSTR1)
+ lwz rWORD8, 4(rSTR2)
+#endif
+ cmplw cr5, rWORD7, rWORD8
b L(dP2e)
/* Remainder is 12 */
.align 4
L(dPs3):
- slw rWORD3,rWORD1,r11
- slw rWORD4,rWORD2,r11
- cmplw cr1,rWORD3,rWORD4
+ slw rWORD3, rWORD1, rWORD6
+ slw rWORD4, rWORD2, rWORD6
+ cmplw cr1, rWORD3, rWORD4
b L(dP3e)
/* Count is a multiple of 16, remainder is 0 */
.align 4
L(dPs4):
- mtctr rTMP
- slw rWORD1,rWORD1,r11
- slw rWORD2,rWORD2,r11
- cmplw cr0,rWORD1,rWORD2
+ mtctr r0
+ slw rWORD1, rWORD1, rWORD6
+ slw rWORD2, rWORD2, rWORD6
+ cmplw cr7, rWORD1, rWORD2
b L(dP4e)
/* At this point we know both strings are word aligned and the
compare length is at least 8 bytes. */
.align 4
L(Waligned):
- andi. rBITDIF,rN,12 /* Get the word remainder */
- srwi rTMP,rN,4 /* Divide by 16 */
- cmplwi cr1,rBITDIF,8
- cmplwi cr7,rN,16
- clrlwi rN,rN,30
+ andi. r12, rN, 12 /* Get the word remainder */
+ srwi r0, rN, 4 /* Divide by 16 */
+ cmplwi cr1, r12, 8
+ cmplwi cr7, rN, 16
+ clrlwi rN, rN, 30
beq L(dP4)
- bgt cr1,L(dP3)
- beq cr1,L(dP2)
+ bgt cr1, L(dP3)
+ beq cr1, L(dP2)
/* Remainder is 4 */
.align 4
L(dP1):
- mtctr rTMP
+ mtctr r0
/* Normally we'd use rWORD7/rWORD8 here, but since we might exit early
(8-15 byte compare), we want to use only volatile registers. This
means we can avoid restoring non-volatile registers since we did not
change any on the early exit path. The key here is the non-early
exit path only cares about the condition code (cr5), not about which
register pair was used. */
- lwz rWORD5,0(rSTR1)
- lwz rWORD6,0(rSTR2)
- cmplw cr5,rWORD5,rWORD6
- blt cr7,L(dP1x)
- lwz rWORD1,4(rSTR1)
- lwz rWORD2,4(rSTR2)
- cmplw cr0,rWORD1,rWORD2
+#ifdef __LITTLE_ENDIAN__
+ lwbrx rWORD5, 0, rSTR1
+ lwbrx rWORD6, 0, rSTR2
+ addi rSTR1, rSTR1, 4
+ addi rSTR2, rSTR2, 4
+#else
+ lwz rWORD5, 0(rSTR1)
+ lwz rWORD6, 0(rSTR2)
+#endif
+ cmplw cr5, rWORD5, rWORD6
+ blt cr7, L(dP1x)
+#ifdef __LITTLE_ENDIAN__
+ lwbrx rWORD1, 0, rSTR1
+ lwbrx rWORD2, 0, rSTR2
+ addi rSTR1, rSTR1, 4
+ addi rSTR2, rSTR2, 4
+#else
+ lwz rWORD1, 4(rSTR1)
+ lwz rWORD2, 4(rSTR2)
+#endif
+ cmplw cr7, rWORD1, rWORD2
L(dP1e):
- lwz rWORD3,8(rSTR1)
- lwz rWORD4,8(rSTR2)
- cmplw cr1,rWORD3,rWORD4
- lwz rWORD5,12(rSTR1)
- lwz rWORD6,12(rSTR2)
- cmplw cr6,rWORD5,rWORD6
- bne cr5,L(dLcr5)
- bne cr0,L(dLcr0)
-
- lwzu rWORD7,16(rSTR1)
- lwzu rWORD8,16(rSTR2)
- bne cr1,L(dLcr1)
- cmplw cr5,rWORD7,rWORD8
+#ifdef __LITTLE_ENDIAN__
+ lwbrx rWORD3, 0, rSTR1
+ lwbrx rWORD4, 0, rSTR2
+ addi rSTR1, rSTR1, 4
+ addi rSTR2, rSTR2, 4
+#else
+ lwz rWORD3, 8(rSTR1)
+ lwz rWORD4, 8(rSTR2)
+#endif
+ cmplw cr1, rWORD3, rWORD4
+#ifdef __LITTLE_ENDIAN__
+ lwbrx rWORD5, 0, rSTR1
+ lwbrx rWORD6, 0, rSTR2
+ addi rSTR1, rSTR1, 4
+ addi rSTR2, rSTR2, 4
+#else
+ lwz rWORD5, 12(rSTR1)
+ lwz rWORD6, 12(rSTR2)
+#endif
+ cmplw cr6, rWORD5, rWORD6
+ bne cr5, L(dLcr5x)
+ bne cr7, L(dLcr7x)
+
+#ifdef __LITTLE_ENDIAN__
+ lwbrx rWORD7, 0, rSTR1
+ lwbrx rWORD8, 0, rSTR2
+ addi rSTR1, rSTR1, 4
+ addi rSTR2, rSTR2, 4
+#else
+ lwzu rWORD7, 16(rSTR1)
+ lwzu rWORD8, 16(rSTR2)
+#endif
+ bne cr1, L(dLcr1)
+ cmplw cr5, rWORD7, rWORD8
bdnz L(dLoop)
- bne cr6,L(dLcr6)
- lwz r30,44(1)
- lwz r31,48(1)
+ bne cr6, L(dLcr6)
+ lwz rWORD7, 44(r1)
+ lwz rWORD8, 48(r1)
.align 3
L(dP1x):
- slwi. r12,rN,3
- bne cr5,L(dLcr5)
- subfic rN,r12,32 /* Shift count is 32 - (rN * 8). */
- lwz 1,0(1)
+ slwi. r12, rN, 3
+ bne cr5, L(dLcr5x)
+ subfic rN, r12, 32 /* Shift count is 32 - (rN * 8). */
+ addi r1, r1, 64
+ cfi_adjust_cfa_offset(-64)
bne L(d00)
- li rRTN,0
+ li rRTN, 0
blr
/* Remainder is 8 */
.align 4
+ cfi_adjust_cfa_offset(64)
L(dP2):
- mtctr rTMP
- lwz rWORD5,0(rSTR1)
- lwz rWORD6,0(rSTR2)
- cmplw cr6,rWORD5,rWORD6
- blt cr7,L(dP2x)
- lwz rWORD7,4(rSTR1)
- lwz rWORD8,4(rSTR2)
- cmplw cr5,rWORD7,rWORD8
+ mtctr r0
+#ifdef __LITTLE_ENDIAN__
+ lwbrx rWORD5, 0, rSTR1
+ lwbrx rWORD6, 0, rSTR2
+ addi rSTR1, rSTR1, 4
+ addi rSTR2, rSTR2, 4
+#else
+ lwz rWORD5, 0(rSTR1)
+ lwz rWORD6, 0(rSTR2)
+#endif
+ cmplw cr6, rWORD5, rWORD6
+ blt cr7, L(dP2x)
+#ifdef __LITTLE_ENDIAN__
+ lwbrx rWORD7, 0, rSTR1
+ lwbrx rWORD8, 0, rSTR2
+ addi rSTR1, rSTR1, 4
+ addi rSTR2, rSTR2, 4
+#else
+ lwz rWORD7, 4(rSTR1)
+ lwz rWORD8, 4(rSTR2)
+#endif
+ cmplw cr5, rWORD7, rWORD8
L(dP2e):
- lwz rWORD1,8(rSTR1)
- lwz rWORD2,8(rSTR2)
- cmplw cr0,rWORD1,rWORD2
- lwz rWORD3,12(rSTR1)
- lwz rWORD4,12(rSTR2)
- cmplw cr1,rWORD3,rWORD4
- addi rSTR1,rSTR1,4
- addi rSTR2,rSTR2,4
- bne cr6,L(dLcr6)
- bne cr5,L(dLcr5)
+#ifdef __LITTLE_ENDIAN__
+ lwbrx rWORD1, 0, rSTR1
+ lwbrx rWORD2, 0, rSTR2
+ addi rSTR1, rSTR1, 4
+ addi rSTR2, rSTR2, 4
+#else
+ lwz rWORD1, 8(rSTR1)
+ lwz rWORD2, 8(rSTR2)
+#endif
+ cmplw cr7, rWORD1, rWORD2
+#ifdef __LITTLE_ENDIAN__
+ lwbrx rWORD3, 0, rSTR1
+ lwbrx rWORD4, 0, rSTR2
+ addi rSTR1, rSTR1, 4
+ addi rSTR2, rSTR2, 4
+#else
+ lwz rWORD3, 12(rSTR1)
+ lwz rWORD4, 12(rSTR2)
+#endif
+ cmplw cr1, rWORD3, rWORD4
+#ifndef __LITTLE_ENDIAN__
+ addi rSTR1, rSTR1, 4
+ addi rSTR2, rSTR2, 4
+#endif
+ bne cr6, L(dLcr6)
+ bne cr5, L(dLcr5)
b L(dLoop2)
/* Again we are on a early exit path (16-23 byte compare), we want to
only use volatile registers and avoid restoring non-volatile
registers. */
.align 4
L(dP2x):
- lwz rWORD3,4(rSTR1)
- lwz rWORD4,4(rSTR2)
- cmplw cr5,rWORD3,rWORD4
- slwi. r12,rN,3
- bne cr6,L(dLcr6)
- addi rSTR1,rSTR1,4
- addi rSTR2,rSTR2,4
- bne cr5,L(dLcr5)
- subfic rN,r12,32 /* Shift count is 32 - (rN * 8). */
- lwz 1,0(1)
+#ifdef __LITTLE_ENDIAN__
+ lwbrx rWORD3, 0, rSTR1
+ lwbrx rWORD4, 0, rSTR2
+ addi rSTR1, rSTR1, 4
+ addi rSTR2, rSTR2, 4
+#else
+ lwz rWORD3, 4(rSTR1)
+ lwz rWORD4, 4(rSTR2)
+#endif
+ cmplw cr1, rWORD3, rWORD4
+ slwi. r12, rN, 3
+ bne cr6, L(dLcr6x)
+#ifndef __LITTLE_ENDIAN__
+ addi rSTR1, rSTR1, 4
+ addi rSTR2, rSTR2, 4
+#endif
+ bne cr1, L(dLcr1x)
+ subfic rN, r12, 32 /* Shift count is 32 - (rN * 8). */
+ addi r1, r1, 64
+ cfi_adjust_cfa_offset(-64)
bne L(d00)
- li rRTN,0
+ li rRTN, 0
blr
/* Remainder is 12 */
.align 4
+ cfi_adjust_cfa_offset(64)
L(dP3):
- mtctr rTMP
- lwz rWORD3,0(rSTR1)
- lwz rWORD4,0(rSTR2)
- cmplw cr1,rWORD3,rWORD4
+ mtctr r0
+#ifdef __LITTLE_ENDIAN__
+ lwbrx rWORD3, 0, rSTR1
+ lwbrx rWORD4, 0, rSTR2
+ addi rSTR1, rSTR1, 4
+ addi rSTR2, rSTR2, 4
+#else
+ lwz rWORD3, 0(rSTR1)
+ lwz rWORD4, 0(rSTR2)
+#endif
+ cmplw cr1, rWORD3, rWORD4
L(dP3e):
- lwz rWORD5,4(rSTR1)
- lwz rWORD6,4(rSTR2)
- cmplw cr6,rWORD5,rWORD6
- blt cr7,L(dP3x)
- lwz rWORD7,8(rSTR1)
- lwz rWORD8,8(rSTR2)
- cmplw cr5,rWORD7,rWORD8
- lwz rWORD1,12(rSTR1)
- lwz rWORD2,12(rSTR2)
- cmplw cr0,rWORD1,rWORD2
- addi rSTR1,rSTR1,8
- addi rSTR2,rSTR2,8
- bne cr1,L(dLcr1)
- bne cr6,L(dLcr6)
+#ifdef __LITTLE_ENDIAN__
+ lwbrx rWORD5, 0, rSTR1
+ lwbrx rWORD6, 0, rSTR2
+ addi rSTR1, rSTR1, 4
+ addi rSTR2, rSTR2, 4
+#else
+ lwz rWORD5, 4(rSTR1)
+ lwz rWORD6, 4(rSTR2)
+#endif
+ cmplw cr6, rWORD5, rWORD6
+ blt cr7, L(dP3x)
+#ifdef __LITTLE_ENDIAN__
+ lwbrx rWORD7, 0, rSTR1
+ lwbrx rWORD8, 0, rSTR2
+ addi rSTR1, rSTR1, 4
+ addi rSTR2, rSTR2, 4
+#else
+ lwz rWORD7, 8(rSTR1)
+ lwz rWORD8, 8(rSTR2)
+#endif
+ cmplw cr5, rWORD7, rWORD8
+#ifdef __LITTLE_ENDIAN__
+ lwbrx rWORD1, 0, rSTR1
+ lwbrx rWORD2, 0, rSTR2
+ addi rSTR1, rSTR1, 4
+ addi rSTR2, rSTR2, 4
+#else
+ lwz rWORD1, 12(rSTR1)
+ lwz rWORD2, 12(rSTR2)
+#endif
+ cmplw cr7, rWORD1, rWORD2
+#ifndef __LITTLE_ENDIAN__
+ addi rSTR1, rSTR1, 8
+ addi rSTR2, rSTR2, 8
+#endif
+ bne cr1, L(dLcr1)
+ bne cr6, L(dLcr6)
b L(dLoop1)
/* Again we are on a early exit path (24-31 byte compare), we want to
only use volatile registers and avoid restoring non-volatile
registers. */
.align 4
L(dP3x):
- lwz rWORD1,8(rSTR1)
- lwz rWORD2,8(rSTR2)
- cmplw cr5,rWORD1,rWORD2
- slwi. r12,rN,3
- bne cr1,L(dLcr1)
- addi rSTR1,rSTR1,8
- addi rSTR2,rSTR2,8
- bne cr6,L(dLcr6)
- subfic rN,r12,32 /* Shift count is 32 - (rN * 8). */
- bne cr5,L(dLcr5)
- lwz 1,0(1)
+#ifdef __LITTLE_ENDIAN__
+ lwbrx rWORD1, 0, rSTR1
+ lwbrx rWORD2, 0, rSTR2
+ addi rSTR1, rSTR1, 4
+ addi rSTR2, rSTR2, 4
+#else
+ lwz rWORD1, 8(rSTR1)
+ lwz rWORD2, 8(rSTR2)
+#endif
+ cmplw cr7, rWORD1, rWORD2
+ slwi. r12, rN, 3
+ bne cr1, L(dLcr1x)
+#ifndef __LITTLE_ENDIAN__
+ addi rSTR1, rSTR1, 8
+ addi rSTR2, rSTR2, 8
+#endif
+ bne cr6, L(dLcr6x)
+ subfic rN, r12, 32 /* Shift count is 32 - (rN * 8). */
+ bne cr7, L(dLcr7x)
+ addi r1, r1, 64
+ cfi_adjust_cfa_offset(-64)
bne L(d00)
- li rRTN,0
+ li rRTN, 0
blr
/* Count is a multiple of 16, remainder is 0 */
.align 4
+ cfi_adjust_cfa_offset(64)
L(dP4):
- mtctr rTMP
- lwz rWORD1,0(rSTR1)
- lwz rWORD2,0(rSTR2)
- cmplw cr0,rWORD1,rWORD2
+ mtctr r0
+#ifdef __LITTLE_ENDIAN__
+ lwbrx rWORD1, 0, rSTR1
+ lwbrx rWORD2, 0, rSTR2
+ addi rSTR1, rSTR1, 4
+ addi rSTR2, rSTR2, 4
+#else
+ lwz rWORD1, 0(rSTR1)
+ lwz rWORD2, 0(rSTR2)
+#endif
+ cmplw cr7, rWORD1, rWORD2
L(dP4e):
- lwz rWORD3,4(rSTR1)
- lwz rWORD4,4(rSTR2)
- cmplw cr1,rWORD3,rWORD4
- lwz rWORD5,8(rSTR1)
- lwz rWORD6,8(rSTR2)
- cmplw cr6,rWORD5,rWORD6
- lwzu rWORD7,12(rSTR1)
- lwzu rWORD8,12(rSTR2)
- cmplw cr5,rWORD7,rWORD8
- bne cr0,L(dLcr0)
- bne cr1,L(dLcr1)
+#ifdef __LITTLE_ENDIAN__
+ lwbrx rWORD3, 0, rSTR1
+ lwbrx rWORD4, 0, rSTR2
+ addi rSTR1, rSTR1, 4
+ addi rSTR2, rSTR2, 4
+#else
+ lwz rWORD3, 4(rSTR1)
+ lwz rWORD4, 4(rSTR2)
+#endif
+ cmplw cr1, rWORD3, rWORD4
+#ifdef __LITTLE_ENDIAN__
+ lwbrx rWORD5, 0, rSTR1
+ lwbrx rWORD6, 0, rSTR2
+ addi rSTR1, rSTR1, 4
+ addi rSTR2, rSTR2, 4
+#else
+ lwz rWORD5, 8(rSTR1)
+ lwz rWORD6, 8(rSTR2)
+#endif
+ cmplw cr6, rWORD5, rWORD6
+#ifdef __LITTLE_ENDIAN__
+ lwbrx rWORD7, 0, rSTR1
+ lwbrx rWORD8, 0, rSTR2
+ addi rSTR1, rSTR1, 4
+ addi rSTR2, rSTR2, 4
+#else
+ lwzu rWORD7, 12(rSTR1)
+ lwzu rWORD8, 12(rSTR2)
+#endif
+ cmplw cr5, rWORD7, rWORD8
+ bne cr7, L(dLcr7)
+ bne cr1, L(dLcr1)
bdz- L(d24) /* Adjust CTR as we start with +4 */
/* This is the primary loop */
.align 4
L(dLoop):
- lwz rWORD1,4(rSTR1)
- lwz rWORD2,4(rSTR2)
- cmplw cr1,rWORD3,rWORD4
- bne cr6,L(dLcr6)
+#ifdef __LITTLE_ENDIAN__
+ lwbrx rWORD1, 0, rSTR1
+ lwbrx rWORD2, 0, rSTR2
+ addi rSTR1, rSTR1, 4
+ addi rSTR2, rSTR2, 4
+#else
+ lwz rWORD1, 4(rSTR1)
+ lwz rWORD2, 4(rSTR2)
+#endif
+ cmplw cr1, rWORD3, rWORD4
+ bne cr6, L(dLcr6)
L(dLoop1):
- lwz rWORD3,8(rSTR1)
- lwz rWORD4,8(rSTR2)
- cmplw cr6,rWORD5,rWORD6
- bne cr5,L(dLcr5)
+#ifdef __LITTLE_ENDIAN__
+ lwbrx rWORD3, 0, rSTR1
+ lwbrx rWORD4, 0, rSTR2
+ addi rSTR1, rSTR1, 4
+ addi rSTR2, rSTR2, 4
+#else
+ lwz rWORD3, 8(rSTR1)
+ lwz rWORD4, 8(rSTR2)
+#endif
+ cmplw cr6, rWORD5, rWORD6
+ bne cr5, L(dLcr5)
L(dLoop2):
- lwz rWORD5,12(rSTR1)
- lwz rWORD6,12(rSTR2)
- cmplw cr5,rWORD7,rWORD8
- bne cr0,L(dLcr0)
+#ifdef __LITTLE_ENDIAN__
+ lwbrx rWORD5, 0, rSTR1
+ lwbrx rWORD6, 0, rSTR2
+ addi rSTR1, rSTR1, 4
+ addi rSTR2, rSTR2, 4
+#else
+ lwz rWORD5, 12(rSTR1)
+ lwz rWORD6, 12(rSTR2)
+#endif
+ cmplw cr5, rWORD7, rWORD8
+ bne cr7, L(dLcr7)
L(dLoop3):
- lwzu rWORD7,16(rSTR1)
- lwzu rWORD8,16(rSTR2)
- bne cr1,L(dLcr1)
- cmplw cr0,rWORD1,rWORD2
+#ifdef __LITTLE_ENDIAN__
+ lwbrx rWORD7, 0, rSTR1
+ lwbrx rWORD8, 0, rSTR2
+ addi rSTR1, rSTR1, 4
+ addi rSTR2, rSTR2, 4
+#else
+ lwzu rWORD7, 16(rSTR1)
+ lwzu rWORD8, 16(rSTR2)
+#endif
+ bne cr1, L(dLcr1)
+ cmplw cr7, rWORD1, rWORD2
bdnz L(dLoop)
L(dL4):
- cmplw cr1,rWORD3,rWORD4
- bne cr6,L(dLcr6)
- cmplw cr6,rWORD5,rWORD6
- bne cr5,L(dLcr5)
- cmplw cr5,rWORD7,rWORD8
+ cmplw cr1, rWORD3, rWORD4
+ bne cr6, L(dLcr6)
+ cmplw cr6, rWORD5, rWORD6
+ bne cr5, L(dLcr5)
+ cmplw cr5, rWORD7, rWORD8
L(d44):
- bne cr0,L(dLcr0)
+ bne cr7, L(dLcr7)
L(d34):
- bne cr1,L(dLcr1)
+ bne cr1, L(dLcr1)
L(d24):
- bne cr6,L(dLcr6)
+ bne cr6, L(dLcr6)
L(d14):
- slwi. r12,rN,3
- bne cr5,L(dLcr5)
+ slwi. r12, rN, 3
+ bne cr5, L(dLcr5)
L(d04):
- lwz r30,44(1)
- lwz r31,48(1)
- lwz 1,0(1)
- subfic rN,r12,32 /* Shift count is 32 - (rN * 8). */
+ lwz rWORD7, 44(r1)
+ lwz rWORD8, 48(r1)
+ addi r1, r1, 64
+ cfi_adjust_cfa_offset(-64)
+ subfic rN, r12, 32 /* Shift count is 32 - (rN * 8). */
beq L(zeroLength)
/* At this point we have a remainder of 1 to 3 bytes to compare. Since
we are aligned it is safe to load the whole word, and use
- shift right to eliminate bits beyond the compare length. */
+ shift right to eliminate bits beyond the compare length. */
L(d00):
- lwz rWORD1,4(rSTR1)
- lwz rWORD2,4(rSTR2)
- srw rWORD1,rWORD1,rN
- srw rWORD2,rWORD2,rN
- cmplw rWORD1,rWORD2
- li rRTN,0
- beqlr
- li rRTN,1
- bgtlr
- li rRTN,-1
+#ifdef __LITTLE_ENDIAN__
+ lwbrx rWORD1, 0, rSTR1
+ lwbrx rWORD2, 0, rSTR2
+ addi rSTR1, rSTR1, 4
+ addi rSTR2, rSTR2, 4
+#else
+ lwz rWORD1, 4(rSTR1)
+ lwz rWORD2, 4(rSTR2)
+#endif
+ srw rWORD1, rWORD1, rN
+ srw rWORD2, rWORD2, rN
+ sub rRTN, rWORD1, rWORD2
blr
.align 4
-L(dLcr0):
- lwz r30,44(1)
- lwz r31,48(1)
- li rRTN,1
- lwz 1,0(1)
- bgtlr cr0
- li rRTN,-1
+ cfi_adjust_cfa_offset(64)
+L(dLcr7):
+ lwz rWORD7, 44(r1)
+ lwz rWORD8, 48(r1)
+L(dLcr7x):
+ li rRTN, 1
+ addi r1, r1, 64
+ cfi_adjust_cfa_offset(-64)
+ bgtlr cr7
+ li rRTN, -1
blr
.align 4
+ cfi_adjust_cfa_offset(64)
L(dLcr1):
- lwz r30,44(1)
- lwz r31,48(1)
- li rRTN,1
- lwz 1,0(1)
+ lwz rWORD7, 44(r1)
+ lwz rWORD8, 48(r1)
+L(dLcr1x):
+ li rRTN, 1
+ addi r1, r1, 64
+ cfi_adjust_cfa_offset(-64)
bgtlr cr1
- li rRTN,-1
+ li rRTN, -1
blr
.align 4
+ cfi_adjust_cfa_offset(64)
L(dLcr6):
- lwz r30,44(1)
- lwz r31,48(1)
- li rRTN,1
- lwz 1,0(1)
+ lwz rWORD7, 44(r1)
+ lwz rWORD8, 48(r1)
+L(dLcr6x):
+ li rRTN, 1
+ addi r1, r1, 64
+ cfi_adjust_cfa_offset(-64)
bgtlr cr6
- li rRTN,-1
+ li rRTN, -1
blr
.align 4
+ cfi_adjust_cfa_offset(64)
L(dLcr5):
- lwz r30,44(1)
- lwz r31,48(1)
+ lwz rWORD7, 44(r1)
+ lwz rWORD8, 48(r1)
L(dLcr5x):
- li rRTN,1
- lwz 1,0(1)
+ li rRTN, 1
+ addi r1, r1, 64
+ cfi_adjust_cfa_offset(-64)
bgtlr cr5
- li rRTN,-1
+ li rRTN, -1
blr
.align 4
L(bytealigned):
- cfi_adjust_cfa_offset(-64)
mtctr rN
/* We need to prime this loop. This loop is swing modulo scheduled
@@ -411,38 +616,39 @@ L(bytealigned):
So we must precondition some registers and condition codes so that
we don't exit the loop early on the first iteration. */
- lbz rWORD1,0(rSTR1)
- lbz rWORD2,0(rSTR2)
+
+ lbz rWORD1, 0(rSTR1)
+ lbz rWORD2, 0(rSTR2)
bdz L(b11)
- cmplw cr0,rWORD1,rWORD2
- lbz rWORD3,1(rSTR1)
- lbz rWORD4,1(rSTR2)
+ cmplw cr7, rWORD1, rWORD2
+ lbz rWORD3, 1(rSTR1)
+ lbz rWORD4, 1(rSTR2)
bdz L(b12)
- cmplw cr1,rWORD3,rWORD4
- lbzu rWORD5,2(rSTR1)
- lbzu rWORD6,2(rSTR2)
+ cmplw cr1, rWORD3, rWORD4
+ lbzu rWORD5, 2(rSTR1)
+ lbzu rWORD6, 2(rSTR2)
bdz L(b13)
.align 4
L(bLoop):
- lbzu rWORD1,1(rSTR1)
- lbzu rWORD2,1(rSTR2)
- bne cr0,L(bLcr0)
+ lbzu rWORD1, 1(rSTR1)
+ lbzu rWORD2, 1(rSTR2)
+ bne cr7, L(bLcr7)
- cmplw cr6,rWORD5,rWORD6
+ cmplw cr6, rWORD5, rWORD6
bdz L(b3i)
- lbzu rWORD3,1(rSTR1)
- lbzu rWORD4,1(rSTR2)
- bne cr1,L(bLcr1)
+ lbzu rWORD3, 1(rSTR1)
+ lbzu rWORD4, 1(rSTR2)
+ bne cr1, L(bLcr1)
- cmplw cr0,rWORD1,rWORD2
+ cmplw cr7, rWORD1, rWORD2
bdz L(b2i)
- lbzu rWORD5,1(rSTR1)
- lbzu rWORD6,1(rSTR2)
- bne cr6,L(bLcr6)
+ lbzu rWORD5, 1(rSTR1)
+ lbzu rWORD6, 1(rSTR2)
+ bne cr6, L(bLcr6)
- cmplw cr1,rWORD3,rWORD4
+ cmplw cr1, rWORD3, rWORD4
bdnz L(bLoop)
/* We speculatively loading bytes before we have tested the previous
@@ -452,67 +658,62 @@ L(bLoop):
tested. In this case we must complete the pending operations
before returning. */
L(b1i):
- bne cr0,L(bLcr0)
- bne cr1,L(bLcr1)
+ bne cr7, L(bLcr7)
+ bne cr1, L(bLcr1)
b L(bx56)
.align 4
L(b2i):
- bne cr6,L(bLcr6)
- bne cr0,L(bLcr0)
+ bne cr6, L(bLcr6)
+ bne cr7, L(bLcr7)
b L(bx34)
.align 4
L(b3i):
- bne cr1,L(bLcr1)
- bne cr6,L(bLcr6)
+ bne cr1, L(bLcr1)
+ bne cr6, L(bLcr6)
b L(bx12)
.align 4
-L(bLcr0):
- li rRTN,1
- bgtlr cr0
- li rRTN,-1
+L(bLcr7):
+ li rRTN, 1
+ bgtlr cr7
+ li rRTN, -1
blr
L(bLcr1):
- li rRTN,1
+ li rRTN, 1
bgtlr cr1
- li rRTN,-1
+ li rRTN, -1
blr
L(bLcr6):
- li rRTN,1
+ li rRTN, 1
bgtlr cr6
- li rRTN,-1
+ li rRTN, -1
blr
L(b13):
- bne cr0,L(bx12)
- bne cr1,L(bx34)
+ bne cr7, L(bx12)
+ bne cr1, L(bx34)
L(bx56):
- sub rRTN,rWORD5,rWORD6
+ sub rRTN, rWORD5, rWORD6
blr
nop
L(b12):
- bne cr0,L(bx12)
+ bne cr7, L(bx12)
L(bx34):
- sub rRTN,rWORD3,rWORD4
+ sub rRTN, rWORD3, rWORD4
blr
-
L(b11):
L(bx12):
- sub rRTN,rWORD1,rWORD2
+ sub rRTN, rWORD1, rWORD2
blr
-
.align 4
-L(zeroLengthReturn):
-
L(zeroLength):
- li rRTN,0
+ li rRTN, 0
blr
- cfi_adjust_cfa_offset(64)
.align 4
/* At this point we know the strings have different alignment and the
- compare length is at least 8 bytes. rBITDIF contains the low order
+ compare length is at least 8 bytes. r12 contains the low order
2 bits of rSTR1 and cr5 contains the result of the logical compare
- of rBITDIF to 0. If rBITDIF == 0 then rStr1 is word aligned and can
+ of r12 to 0. If r12 == 0 then rStr1 is word aligned and can
perform the Wunaligned loop.
Otherwise we know that rSTR1 is not already word aligned yet.
@@ -521,465 +722,654 @@ L(zeroLength):
eliminate bits preceding the first byte. Since we want to join the
normal (Wualigned) compare loop, starting at the second word,
we need to adjust the length (rN) and special case the loop
- versioning for the first W. This insures that the loop count is
+ versioning for the first W. This ensures that the loop count is
correct and the first W (shifted) is in the expected resister pair. */
#define rSHL r29 /* Unaligned shift left count. */
#define rSHR r28 /* Unaligned shift right count. */
-#define rB r27 /* Left rotation temp for rWORD2. */
-#define rD r26 /* Left rotation temp for rWORD4. */
-#define rF r25 /* Left rotation temp for rWORD6. */
-#define rH r24 /* Left rotation temp for rWORD8. */
-#define rA r0 /* Right rotation temp for rWORD2. */
-#define rC r12 /* Right rotation temp for rWORD4. */
-#define rE r0 /* Right rotation temp for rWORD6. */
-#define rG r12 /* Right rotation temp for rWORD8. */
+#define rWORD8_SHIFT r27 /* Left rotation temp for rWORD2. */
+#define rWORD2_SHIFT r26 /* Left rotation temp for rWORD4. */
+#define rWORD4_SHIFT r25 /* Left rotation temp for rWORD6. */
+#define rWORD6_SHIFT r24 /* Left rotation temp for rWORD8. */
+ cfi_adjust_cfa_offset(64)
L(unaligned):
- stw r29,40(r1)
- cfi_offset(r29,(40-64))
- clrlwi rSHL,rSTR2,30
- stw r28,36(r1)
- cfi_offset(r28,(36-64))
- beq cr5,L(Wunaligned)
- stw r27,32(r1)
- cfi_offset(r27,(32-64))
+ stw rSHL, 40(r1)
+ cfi_offset(rSHL, (40-64))
+ clrlwi rSHL, rSTR2, 30
+ stw rSHR, 36(r1)
+ cfi_offset(rSHR, (36-64))
+ beq cr5, L(Wunaligned)
+ stw rWORD8_SHIFT, 32(r1)
+ cfi_offset(rWORD8_SHIFT, (32-64))
/* Adjust the logical start of rSTR2 to compensate for the extra bits
in the 1st rSTR1 W. */
- sub r27,rSTR2,rBITDIF
+ sub rWORD8_SHIFT, rSTR2, r12
/* But do not attempt to address the W before that W that contains
the actual start of rSTR2. */
- clrrwi rSTR2,rSTR2,2
- stw r26,28(r1)
- cfi_offset(r26,(28-64))
-/* Compute the left/right shift counts for the unalign rSTR2,
+ clrrwi rSTR2, rSTR2, 2
+ stw rWORD2_SHIFT, 28(r1)
+ cfi_offset(rWORD2_SHIFT, (28-64))
+/* Compute the left/right shift counts for the unaligned rSTR2,
compensating for the logical (W aligned) start of rSTR1. */
- clrlwi rSHL,r27,30
- clrrwi rSTR1,rSTR1,2
- stw r25,24(r1)
- cfi_offset(r25,(24-64))
- slwi rSHL,rSHL,3
- cmplw cr5,r27,rSTR2
- add rN,rN,rBITDIF
- slwi r11,rBITDIF,3
- stw r24,20(r1)
- cfi_offset(r24,(20-64))
- subfic rSHR,rSHL,32
- srwi rTMP,rN,4 /* Divide by 16 */
- andi. rBITDIF,rN,12 /* Get the W remainder */
+ clrlwi rSHL, rWORD8_SHIFT, 30
+ clrrwi rSTR1, rSTR1, 2
+ stw rWORD4_SHIFT, 24(r1)
+ cfi_offset(rWORD4_SHIFT, (24-64))
+ slwi rSHL, rSHL, 3
+ cmplw cr5, rWORD8_SHIFT, rSTR2
+ add rN, rN, r12
+ slwi rWORD6, r12, 3
+ stw rWORD6_SHIFT, 20(r1)
+ cfi_offset(rWORD6_SHIFT, (20-64))
+ subfic rSHR, rSHL, 32
+ srwi r0, rN, 4 /* Divide by 16 */
+ andi. r12, rN, 12 /* Get the W remainder */
/* We normally need to load 2 Ws to start the unaligned rSTR2, but in
this special case those bits may be discarded anyway. Also we
must avoid loading a W where none of the bits are part of rSTR2 as
this may cross a page boundary and cause a page fault. */
- li rWORD8,0
- blt cr5,L(dus0)
- lwz rWORD8,0(rSTR2)
- la rSTR2,4(rSTR2)
- slw rWORD8,rWORD8,rSHL
+ li rWORD8, 0
+ blt cr5, L(dus0)
+#ifdef __LITTLE_ENDIAN__
+ lwbrx rWORD8, 0, rSTR2
+ addi rSTR2, rSTR2, 4
+#else
+ lwz rWORD8, 0(rSTR2)
+ addi rSTR2, rSTR2, 4
+#endif
+ slw rWORD8, rWORD8, rSHL
L(dus0):
- lwz rWORD1,0(rSTR1)
- lwz rWORD2,0(rSTR2)
- cmplwi cr1,rBITDIF,8
- cmplwi cr7,rN,16
- srw rG,rWORD2,rSHR
- clrlwi rN,rN,30
+#ifdef __LITTLE_ENDIAN__
+ lwbrx rWORD1, 0, rSTR1
+ lwbrx rWORD2, 0, rSTR2
+ addi rSTR1, rSTR1, 4
+ addi rSTR2, rSTR2, 4
+#else
+ lwz rWORD1, 0(rSTR1)
+ lwz rWORD2, 0(rSTR2)
+#endif
+ cmplwi cr1, r12, 8
+ cmplwi cr7, rN, 16
+ srw r12, rWORD2, rSHR
+ clrlwi rN, rN, 30
beq L(duPs4)
- mtctr rTMP
- or rWORD8,rG,rWORD8
- bgt cr1,L(duPs3)
- beq cr1,L(duPs2)
+ mtctr r0
+ or rWORD8, r12, rWORD8
+ bgt cr1, L(duPs3)
+ beq cr1, L(duPs2)
/* Remainder is 4 */
.align 4
L(dusP1):
- slw rB,rWORD2,rSHL
- slw rWORD7,rWORD1,r11
- slw rWORD8,rWORD8,r11
- bge cr7,L(duP1e)
+ slw rWORD8_SHIFT, rWORD2, rSHL
+ slw rWORD7, rWORD1, rWORD6
+ slw rWORD8, rWORD8, rWORD6
+ bge cr7, L(duP1e)
/* At this point we exit early with the first word compare
complete and remainder of 0 to 3 bytes. See L(du14) for details on
how we handle the remaining bytes. */
- cmplw cr5,rWORD7,rWORD8
- slwi. rN,rN,3
- bne cr5,L(duLcr5)
- cmplw cr7,rN,rSHR
+ cmplw cr5, rWORD7, rWORD8
+ slwi. rN, rN, 3
+ bne cr5, L(duLcr5)
+ cmplw cr7, rN, rSHR
beq L(duZeroReturn)
- li rA,0
- ble cr7,L(dutrim)
- lwz rWORD2,4(rSTR2)
- srw rA,rWORD2,rSHR
+ li r0, 0
+ ble cr7, L(dutrim)
+#ifdef __LITTLE_ENDIAN__
+ lwbrx rWORD2, 0, rSTR2
+ addi rSTR2, rSTR2, 4
+#else
+ lwz rWORD2, 4(rSTR2)
+#endif
+ srw r0, rWORD2, rSHR
b L(dutrim)
/* Remainder is 8 */
.align 4
L(duPs2):
- slw rH,rWORD2,rSHL
- slw rWORD5,rWORD1,r11
- slw rWORD6,rWORD8,r11
+ slw rWORD6_SHIFT, rWORD2, rSHL
+ slw rWORD5, rWORD1, rWORD6
+ slw rWORD6, rWORD8, rWORD6
b L(duP2e)
/* Remainder is 12 */
.align 4
L(duPs3):
- slw rF,rWORD2,rSHL
- slw rWORD3,rWORD1,r11
- slw rWORD4,rWORD8,r11
+ slw rWORD4_SHIFT, rWORD2, rSHL
+ slw rWORD3, rWORD1, rWORD6
+ slw rWORD4, rWORD8, rWORD6
b L(duP3e)
/* Count is a multiple of 16, remainder is 0 */
.align 4
L(duPs4):
- mtctr rTMP
- or rWORD8,rG,rWORD8
- slw rD,rWORD2,rSHL
- slw rWORD1,rWORD1,r11
- slw rWORD2,rWORD8,r11
+ mtctr r0
+ or rWORD8, r12, rWORD8
+ slw rWORD2_SHIFT, rWORD2, rSHL
+ slw rWORD1, rWORD1, rWORD6
+ slw rWORD2, rWORD8, rWORD6
b L(duP4e)
/* At this point we know rSTR1 is word aligned and the
compare length is at least 8 bytes. */
.align 4
L(Wunaligned):
- stw r27,32(r1)
- cfi_offset(r27,(32-64))
- clrrwi rSTR2,rSTR2,2
- stw r26,28(r1)
- cfi_offset(r26,(28-64))
- srwi rTMP,rN,4 /* Divide by 16 */
- stw r25,24(r1)
- cfi_offset(r25,(24-64))
- andi. rBITDIF,rN,12 /* Get the W remainder */
- stw r24,20(r1)
- cfi_offset(r24,(24-64))
- slwi rSHL,rSHL,3
- lwz rWORD6,0(rSTR2)
- lwzu rWORD8,4(rSTR2)
- cmplwi cr1,rBITDIF,8
- cmplwi cr7,rN,16
- clrlwi rN,rN,30
- subfic rSHR,rSHL,32
- slw rH,rWORD6,rSHL
+ stw rWORD8_SHIFT, 32(r1)
+ cfi_offset(rWORD8_SHIFT, (32-64))
+ clrrwi rSTR2, rSTR2, 2
+ stw rWORD2_SHIFT, 28(r1)
+ cfi_offset(rWORD2_SHIFT, (28-64))
+ srwi r0, rN, 4 /* Divide by 16 */
+ stw rWORD4_SHIFT, 24(r1)
+ cfi_offset(rWORD4_SHIFT, (24-64))
+ andi. r12, rN, 12 /* Get the W remainder */
+ stw rWORD6_SHIFT, 20(r1)
+ cfi_offset(rWORD6_SHIFT, (20-64))
+ slwi rSHL, rSHL, 3
+#ifdef __LITTLE_ENDIAN__
+ lwbrx rWORD6, 0, rSTR2
+ addi rSTR2, rSTR2, 4
+ lwbrx rWORD8, 0, rSTR2
+ addi rSTR2, rSTR2, 4
+#else
+ lwz rWORD6, 0(rSTR2)
+ lwzu rWORD8, 4(rSTR2)
+#endif
+ cmplwi cr1, r12, 8
+ cmplwi cr7, rN, 16
+ clrlwi rN, rN, 30
+ subfic rSHR, rSHL, 32
+ slw rWORD6_SHIFT, rWORD6, rSHL
beq L(duP4)
- mtctr rTMP
- bgt cr1,L(duP3)
- beq cr1,L(duP2)
+ mtctr r0
+ bgt cr1, L(duP3)
+ beq cr1, L(duP2)
/* Remainder is 4 */
.align 4
L(duP1):
- srw rG,rWORD8,rSHR
- lwz rWORD7,0(rSTR1)
- slw rB,rWORD8,rSHL
- or rWORD8,rG,rH
- blt cr7,L(duP1x)
+ srw r12, rWORD8, rSHR
+#ifdef __LITTLE_ENDIAN__
+ lwbrx rWORD7, 0, rSTR1
+ addi rSTR1, rSTR1, 4
+#else
+ lwz rWORD7, 0(rSTR1)
+#endif
+ slw rWORD8_SHIFT, rWORD8, rSHL
+ or rWORD8, r12, rWORD6_SHIFT
+ blt cr7, L(duP1x)
L(duP1e):
- lwz rWORD1,4(rSTR1)
- lwz rWORD2,4(rSTR2)
- cmplw cr5,rWORD7,rWORD8
- srw rA,rWORD2,rSHR
- slw rD,rWORD2,rSHL
- or rWORD2,rA,rB
- lwz rWORD3,8(rSTR1)
- lwz rWORD4,8(rSTR2)
- cmplw cr0,rWORD1,rWORD2
- srw rC,rWORD4,rSHR
- slw rF,rWORD4,rSHL
- bne cr5,L(duLcr5)
- or rWORD4,rC,rD
- lwz rWORD5,12(rSTR1)
- lwz rWORD6,12(rSTR2)
- cmplw cr1,rWORD3,rWORD4
- srw rE,rWORD6,rSHR
- slw rH,rWORD6,rSHL
- bne cr0,L(duLcr0)
- or rWORD6,rE,rF
- cmplw cr6,rWORD5,rWORD6
+#ifdef __LITTLE_ENDIAN__
+ lwbrx rWORD1, 0, rSTR1
+ lwbrx rWORD2, 0, rSTR2
+ addi rSTR1, rSTR1, 4
+ addi rSTR2, rSTR2, 4
+#else
+ lwz rWORD1, 4(rSTR1)
+ lwz rWORD2, 4(rSTR2)
+#endif
+ cmplw cr5, rWORD7, rWORD8
+ srw r0, rWORD2, rSHR
+ slw rWORD2_SHIFT, rWORD2, rSHL
+ or rWORD2, r0, rWORD8_SHIFT
+#ifdef __LITTLE_ENDIAN__
+ lwbrx rWORD3, 0, rSTR1
+ lwbrx rWORD4, 0, rSTR2
+ addi rSTR1, rSTR1, 4
+ addi rSTR2, rSTR2, 4
+#else
+ lwz rWORD3, 8(rSTR1)
+ lwz rWORD4, 8(rSTR2)
+#endif
+ cmplw cr7, rWORD1, rWORD2
+ srw r12, rWORD4, rSHR
+ slw rWORD4_SHIFT, rWORD4, rSHL
+ bne cr5, L(duLcr5)
+ or rWORD4, r12, rWORD2_SHIFT
+#ifdef __LITTLE_ENDIAN__
+ lwbrx rWORD5, 0, rSTR1
+ lwbrx rWORD6, 0, rSTR2
+ addi rSTR1, rSTR1, 4
+ addi rSTR2, rSTR2, 4
+#else
+ lwz rWORD5, 12(rSTR1)
+ lwz rWORD6, 12(rSTR2)
+#endif
+ cmplw cr1, rWORD3, rWORD4
+ srw r0, rWORD6, rSHR
+ slw rWORD6_SHIFT, rWORD6, rSHL
+ bne cr7, L(duLcr7)
+ or rWORD6, r0, rWORD4_SHIFT
+ cmplw cr6, rWORD5, rWORD6
b L(duLoop3)
.align 4
/* At this point we exit early with the first word compare
complete and remainder of 0 to 3 bytes. See L(du14) for details on
how we handle the remaining bytes. */
L(duP1x):
- cmplw cr5,rWORD7,rWORD8
- slwi. rN,rN,3
- bne cr5,L(duLcr5)
- cmplw cr7,rN,rSHR
+ cmplw cr5, rWORD7, rWORD8
+ slwi. rN, rN, 3
+ bne cr5, L(duLcr5)
+ cmplw cr7, rN, rSHR
beq L(duZeroReturn)
- li rA,0
- ble cr7,L(dutrim)
- ld rWORD2,8(rSTR2)
- srw rA,rWORD2,rSHR
+ li r0, 0
+ ble cr7, L(dutrim)
+#ifdef __LITTLE_ENDIAN__
+ lwbrx rWORD2, 0, rSTR2
+ addi rSTR2, rSTR2, 4
+#else
+ lwz rWORD2, 8(rSTR2)
+#endif
+ srw r0, rWORD2, rSHR
b L(dutrim)
/* Remainder is 8 */
.align 4
L(duP2):
- srw rE,rWORD8,rSHR
- lwz rWORD5,0(rSTR1)
- or rWORD6,rE,rH
- slw rH,rWORD8,rSHL
+ srw r0, rWORD8, rSHR
+#ifdef __LITTLE_ENDIAN__
+ lwbrx rWORD5, 0, rSTR1
+ addi rSTR1, rSTR1, 4
+#else
+ lwz rWORD5, 0(rSTR1)
+#endif
+ or rWORD6, r0, rWORD6_SHIFT
+ slw rWORD6_SHIFT, rWORD8, rSHL
L(duP2e):
- lwz rWORD7,4(rSTR1)
- lwz rWORD8,4(rSTR2)
- cmplw cr6,rWORD5,rWORD6
- srw rG,rWORD8,rSHR
- slw rB,rWORD8,rSHL
- or rWORD8,rG,rH
- blt cr7,L(duP2x)
- lwz rWORD1,8(rSTR1)
- lwz rWORD2,8(rSTR2)
- cmplw cr5,rWORD7,rWORD8
- bne cr6,L(duLcr6)
- srw rA,rWORD2,rSHR
- slw rD,rWORD2,rSHL
- or rWORD2,rA,rB
- lwz rWORD3,12(rSTR1)
- lwz rWORD4,12(rSTR2)
- cmplw cr0,rWORD1,rWORD2
- bne cr5,L(duLcr5)
- srw rC,rWORD4,rSHR
- slw rF,rWORD4,rSHL
- or rWORD4,rC,rD
- addi rSTR1,rSTR1,4
- addi rSTR2,rSTR2,4
- cmplw cr1,rWORD3,rWORD4
+#ifdef __LITTLE_ENDIAN__
+ lwbrx rWORD7, 0, rSTR1
+ lwbrx rWORD8, 0, rSTR2
+ addi rSTR1, rSTR1, 4
+ addi rSTR2, rSTR2, 4
+#else
+ lwz rWORD7, 4(rSTR1)
+ lwz rWORD8, 4(rSTR2)
+#endif
+ cmplw cr6, rWORD5, rWORD6
+ srw r12, rWORD8, rSHR
+ slw rWORD8_SHIFT, rWORD8, rSHL
+ or rWORD8, r12, rWORD6_SHIFT
+ blt cr7, L(duP2x)
+#ifdef __LITTLE_ENDIAN__
+ lwbrx rWORD1, 0, rSTR1
+ lwbrx rWORD2, 0, rSTR2
+ addi rSTR1, rSTR1, 4
+ addi rSTR2, rSTR2, 4
+#else
+ lwz rWORD1, 8(rSTR1)
+ lwz rWORD2, 8(rSTR2)
+#endif
+ cmplw cr5, rWORD7, rWORD8
+ bne cr6, L(duLcr6)
+ srw r0, rWORD2, rSHR
+ slw rWORD2_SHIFT, rWORD2, rSHL
+ or rWORD2, r0, rWORD8_SHIFT
+#ifdef __LITTLE_ENDIAN__
+ lwbrx rWORD3, 0, rSTR1
+ lwbrx rWORD4, 0, rSTR2
+ addi rSTR1, rSTR1, 4
+ addi rSTR2, rSTR2, 4
+#else
+ lwz rWORD3, 12(rSTR1)
+ lwz rWORD4, 12(rSTR2)
+#endif
+ cmplw cr7, rWORD1, rWORD2
+ bne cr5, L(duLcr5)
+ srw r12, rWORD4, rSHR
+ slw rWORD4_SHIFT, rWORD4, rSHL
+ or rWORD4, r12, rWORD2_SHIFT
+#ifndef __LITTLE_ENDIAN__
+ addi rSTR1, rSTR1, 4
+ addi rSTR2, rSTR2, 4
+#endif
+ cmplw cr1, rWORD3, rWORD4
b L(duLoop2)
.align 4
L(duP2x):
- cmplw cr5,rWORD7,rWORD8
- addi rSTR1,rSTR1,4
- addi rSTR2,rSTR2,4
- bne cr6,L(duLcr6)
- slwi. rN,rN,3
- bne cr5,L(duLcr5)
- cmplw cr7,rN,rSHR
+ cmplw cr5, rWORD7, rWORD8
+#ifndef __LITTLE_ENDIAN__
+ addi rSTR1, rSTR1, 4
+ addi rSTR2, rSTR2, 4
+#endif
+ bne cr6, L(duLcr6)
+ slwi. rN, rN, 3
+ bne cr5, L(duLcr5)
+ cmplw cr7, rN, rSHR
beq L(duZeroReturn)
- li rA,0
- ble cr7,L(dutrim)
- lwz rWORD2,4(rSTR2)
- srw rA,rWORD2,rSHR
+ li r0, 0
+ ble cr7, L(dutrim)
+#ifdef __LITTLE_ENDIAN__
+ lwbrx rWORD2, 0, rSTR2
+ addi rSTR2, rSTR2, 4
+#else
+ lwz rWORD2, 4(rSTR2)
+#endif
+ srw r0, rWORD2, rSHR
b L(dutrim)
/* Remainder is 12 */
.align 4
L(duP3):
- srw rC,rWORD8,rSHR
- lwz rWORD3,0(rSTR1)
- slw rF,rWORD8,rSHL
- or rWORD4,rC,rH
+ srw r12, rWORD8, rSHR
+#ifdef __LITTLE_ENDIAN__
+ lwbrx rWORD3, 0, rSTR1
+ addi rSTR1, rSTR1, 4
+#else
+ lwz rWORD3, 0(rSTR1)
+#endif
+ slw rWORD4_SHIFT, rWORD8, rSHL
+ or rWORD4, r12, rWORD6_SHIFT
L(duP3e):
- lwz rWORD5,4(rSTR1)
- lwz rWORD6,4(rSTR2)
- cmplw cr1,rWORD3,rWORD4
- srw rE,rWORD6,rSHR
- slw rH,rWORD6,rSHL
- or rWORD6,rE,rF
- lwz rWORD7,8(rSTR1)
- lwz rWORD8,8(rSTR2)
- cmplw cr6,rWORD5,rWORD6
- bne cr1,L(duLcr1)
- srw rG,rWORD8,rSHR
- slw rB,rWORD8,rSHL
- or rWORD8,rG,rH
- blt cr7,L(duP3x)
- lwz rWORD1,12(rSTR1)
- lwz rWORD2,12(rSTR2)
- cmplw cr5,rWORD7,rWORD8
- bne cr6,L(duLcr6)
- srw rA,rWORD2,rSHR
- slw rD,rWORD2,rSHL
- or rWORD2,rA,rB
- addi rSTR1,rSTR1,8
- addi rSTR2,rSTR2,8
- cmplw cr0,rWORD1,rWORD2
+#ifdef __LITTLE_ENDIAN__
+ lwbrx rWORD5, 0, rSTR1
+ lwbrx rWORD6, 0, rSTR2
+ addi rSTR1, rSTR1, 4
+ addi rSTR2, rSTR2, 4
+#else
+ lwz rWORD5, 4(rSTR1)
+ lwz rWORD6, 4(rSTR2)
+#endif
+ cmplw cr1, rWORD3, rWORD4
+ srw r0, rWORD6, rSHR
+ slw rWORD6_SHIFT, rWORD6, rSHL
+ or rWORD6, r0, rWORD4_SHIFT
+#ifdef __LITTLE_ENDIAN__
+ lwbrx rWORD7, 0, rSTR1
+ lwbrx rWORD8, 0, rSTR2
+ addi rSTR1, rSTR1, 4
+ addi rSTR2, rSTR2, 4
+#else
+ lwz rWORD7, 8(rSTR1)
+ lwz rWORD8, 8(rSTR2)
+#endif
+ cmplw cr6, rWORD5, rWORD6
+ bne cr1, L(duLcr1)
+ srw r12, rWORD8, rSHR
+ slw rWORD8_SHIFT, rWORD8, rSHL
+ or rWORD8, r12, rWORD6_SHIFT
+ blt cr7, L(duP3x)
+#ifdef __LITTLE_ENDIAN__
+ lwbrx rWORD1, 0, rSTR1
+ lwbrx rWORD2, 0, rSTR2
+ addi rSTR1, rSTR1, 4
+ addi rSTR2, rSTR2, 4
+#else
+ lwz rWORD1, 12(rSTR1)
+ lwz rWORD2, 12(rSTR2)
+#endif
+ cmplw cr5, rWORD7, rWORD8
+ bne cr6, L(duLcr6)
+ srw r0, rWORD2, rSHR
+ slw rWORD2_SHIFT, rWORD2, rSHL
+ or rWORD2, r0, rWORD8_SHIFT
+#ifndef __LITTLE_ENDIAN__
+ addi rSTR1, rSTR1, 8
+ addi rSTR2, rSTR2, 8
+#endif
+ cmplw cr7, rWORD1, rWORD2
b L(duLoop1)
.align 4
L(duP3x):
- addi rSTR1,rSTR1,8
- addi rSTR2,rSTR2,8
- bne cr1,L(duLcr1)
- cmplw cr5,rWORD7,rWORD8
- bne cr6,L(duLcr6)
- slwi. rN,rN,3
- bne cr5,L(duLcr5)
- cmplw cr7,rN,rSHR
+#ifndef __LITTLE_ENDIAN__
+ addi rSTR1, rSTR1, 8
+ addi rSTR2, rSTR2, 8
+#endif
+#if 0
+/* Huh? We've already branched on cr1! */
+ bne cr1, L(duLcr1)
+#endif
+ cmplw cr5, rWORD7, rWORD8
+ bne cr6, L(duLcr6)
+ slwi. rN, rN, 3
+ bne cr5, L(duLcr5)
+ cmplw cr7, rN, rSHR
beq L(duZeroReturn)
- li rA,0
- ble cr7,L(dutrim)
- lwz rWORD2,4(rSTR2)
- srw rA,rWORD2,rSHR
+ li r0, 0
+ ble cr7, L(dutrim)
+#ifdef __LITTLE_ENDIAN__
+ lwbrx rWORD2, 0, rSTR2
+ addi rSTR2, rSTR2, 4
+#else
+ lwz rWORD2, 4(rSTR2)
+#endif
+ srw r0, rWORD2, rSHR
b L(dutrim)
/* Count is a multiple of 16, remainder is 0 */
.align 4
L(duP4):
- mtctr rTMP
- srw rA,rWORD8,rSHR
- lwz rWORD1,0(rSTR1)
- slw rD,rWORD8,rSHL
- or rWORD2,rA,rH
+ mtctr r0
+ srw r0, rWORD8, rSHR
+#ifdef __LITTLE_ENDIAN__
+ lwbrx rWORD1, 0, rSTR1
+ addi rSTR1, rSTR1, 4
+#else
+ lwz rWORD1, 0(rSTR1)
+#endif
+ slw rWORD2_SHIFT, rWORD8, rSHL
+ or rWORD2, r0, rWORD6_SHIFT
L(duP4e):
- lwz rWORD3,4(rSTR1)
- lwz rWORD4,4(rSTR2)
- cmplw cr0,rWORD1,rWORD2
- srw rC,rWORD4,rSHR
- slw rF,rWORD4,rSHL
- or rWORD4,rC,rD
- lwz rWORD5,8(rSTR1)
- lwz rWORD6,8(rSTR2)
- cmplw cr1,rWORD3,rWORD4
- bne cr0,L(duLcr0)
- srw rE,rWORD6,rSHR
- slw rH,rWORD6,rSHL
- or rWORD6,rE,rF
- lwzu rWORD7,12(rSTR1)
- lwzu rWORD8,12(rSTR2)
- cmplw cr6,rWORD5,rWORD6
- bne cr1,L(duLcr1)
- srw rG,rWORD8,rSHR
- slw rB,rWORD8,rSHL
- or rWORD8,rG,rH
- cmplw cr5,rWORD7,rWORD8
+#ifdef __LITTLE_ENDIAN__
+ lwbrx rWORD3, 0, rSTR1
+ lwbrx rWORD4, 0, rSTR2
+ addi rSTR1, rSTR1, 4
+ addi rSTR2, rSTR2, 4
+#else
+ lwz rWORD3, 4(rSTR1)
+ lwz rWORD4, 4(rSTR2)
+#endif
+ cmplw cr7, rWORD1, rWORD2
+ srw r12, rWORD4, rSHR
+ slw rWORD4_SHIFT, rWORD4, rSHL
+ or rWORD4, r12, rWORD2_SHIFT
+#ifdef __LITTLE_ENDIAN__
+ lwbrx rWORD5, 0, rSTR1
+ lwbrx rWORD6, 0, rSTR2
+ addi rSTR1, rSTR1, 4
+ addi rSTR2, rSTR2, 4
+#else
+ lwz rWORD5, 8(rSTR1)
+ lwz rWORD6, 8(rSTR2)
+#endif
+ cmplw cr1, rWORD3, rWORD4
+ bne cr7, L(duLcr7)
+ srw r0, rWORD6, rSHR
+ slw rWORD6_SHIFT, rWORD6, rSHL
+ or rWORD6, r0, rWORD4_SHIFT
+#ifdef __LITTLE_ENDIAN__
+ lwbrx rWORD7, 0, rSTR1
+ lwbrx rWORD8, 0, rSTR2
+ addi rSTR1, rSTR1, 4
+ addi rSTR2, rSTR2, 4
+#else
+ lwzu rWORD7, 12(rSTR1)
+ lwzu rWORD8, 12(rSTR2)
+#endif
+ cmplw cr6, rWORD5, rWORD6
+ bne cr1, L(duLcr1)
+ srw r12, rWORD8, rSHR
+ slw rWORD8_SHIFT, rWORD8, rSHL
+ or rWORD8, r12, rWORD6_SHIFT
+ cmplw cr5, rWORD7, rWORD8
bdz L(du24) /* Adjust CTR as we start with +4 */
/* This is the primary loop */
.align 4
L(duLoop):
- lwz rWORD1,4(rSTR1)
- lwz rWORD2,4(rSTR2)
- cmplw cr1,rWORD3,rWORD4
- bne cr6,L(duLcr6)
- srw rA,rWORD2,rSHR
- slw rD,rWORD2,rSHL
- or rWORD2,rA,rB
+#ifdef __LITTLE_ENDIAN__
+ lwbrx rWORD1, 0, rSTR1
+ lwbrx rWORD2, 0, rSTR2
+ addi rSTR1, rSTR1, 4
+ addi rSTR2, rSTR2, 4
+#else
+ lwz rWORD1, 4(rSTR1)
+ lwz rWORD2, 4(rSTR2)
+#endif
+ cmplw cr1, rWORD3, rWORD4
+ bne cr6, L(duLcr6)
+ srw r0, rWORD2, rSHR
+ slw rWORD2_SHIFT, rWORD2, rSHL
+ or rWORD2, r0, rWORD8_SHIFT
L(duLoop1):
- lwz rWORD3,8(rSTR1)
- lwz rWORD4,8(rSTR2)
- cmplw cr6,rWORD5,rWORD6
- bne cr5,L(duLcr5)
- srw rC,rWORD4,rSHR
- slw rF,rWORD4,rSHL
- or rWORD4,rC,rD
+#ifdef __LITTLE_ENDIAN__
+ lwbrx rWORD3, 0, rSTR1
+ lwbrx rWORD4, 0, rSTR2
+ addi rSTR1, rSTR1, 4
+ addi rSTR2, rSTR2, 4
+#else
+ lwz rWORD3, 8(rSTR1)
+ lwz rWORD4, 8(rSTR2)
+#endif
+ cmplw cr6, rWORD5, rWORD6
+ bne cr5, L(duLcr5)
+ srw r12, rWORD4, rSHR
+ slw rWORD4_SHIFT, rWORD4, rSHL
+ or rWORD4, r12, rWORD2_SHIFT
L(duLoop2):
- lwz rWORD5,12(rSTR1)
- lwz rWORD6,12(rSTR2)
- cmplw cr5,rWORD7,rWORD8
- bne cr0,L(duLcr0)
- srw rE,rWORD6,rSHR
- slw rH,rWORD6,rSHL
- or rWORD6,rE,rF
+#ifdef __LITTLE_ENDIAN__
+ lwbrx rWORD5, 0, rSTR1
+ lwbrx rWORD6, 0, rSTR2
+ addi rSTR1, rSTR1, 4
+ addi rSTR2, rSTR2, 4
+#else
+ lwz rWORD5, 12(rSTR1)
+ lwz rWORD6, 12(rSTR2)
+#endif
+ cmplw cr5, rWORD7, rWORD8
+ bne cr7, L(duLcr7)
+ srw r0, rWORD6, rSHR
+ slw rWORD6_SHIFT, rWORD6, rSHL
+ or rWORD6, r0, rWORD4_SHIFT
L(duLoop3):
- lwzu rWORD7,16(rSTR1)
- lwzu rWORD8,16(rSTR2)
- cmplw cr0,rWORD1,rWORD2
- bne cr1,L(duLcr1)
- srw rG,rWORD8,rSHR
- slw rB,rWORD8,rSHL
- or rWORD8,rG,rH
+#ifdef __LITTLE_ENDIAN__
+ lwbrx rWORD7, 0, rSTR1
+ lwbrx rWORD8, 0, rSTR2
+ addi rSTR1, rSTR1, 4
+ addi rSTR2, rSTR2, 4
+#else
+ lwzu rWORD7, 16(rSTR1)
+ lwzu rWORD8, 16(rSTR2)
+#endif
+ cmplw cr7, rWORD1, rWORD2
+ bne cr1, L(duLcr1)
+ srw r12, rWORD8, rSHR
+ slw rWORD8_SHIFT, rWORD8, rSHL
+ or rWORD8, r12, rWORD6_SHIFT
bdnz L(duLoop)
L(duL4):
- bne cr1,L(duLcr1)
- cmplw cr1,rWORD3,rWORD4
- bne cr6,L(duLcr6)
- cmplw cr6,rWORD5,rWORD6
- bne cr5,L(duLcr5)
- cmplw cr5,rWORD7,rWORD8
+#if 0
+/* Huh? We've already branched on cr1! */
+ bne cr1, L(duLcr1)
+#endif
+ cmplw cr1, rWORD3, rWORD4
+ bne cr6, L(duLcr6)
+ cmplw cr6, rWORD5, rWORD6
+ bne cr5, L(duLcr5)
+ cmplw cr5, rWORD7, rWORD8
L(du44):
- bne cr0,L(duLcr0)
+ bne cr7, L(duLcr7)
L(du34):
- bne cr1,L(duLcr1)
+ bne cr1, L(duLcr1)
L(du24):
- bne cr6,L(duLcr6)
+ bne cr6, L(duLcr6)
L(du14):
- slwi. rN,rN,3
- bne cr5,L(duLcr5)
+ slwi. rN, rN, 3
+ bne cr5, L(duLcr5)
/* At this point we have a remainder of 1 to 3 bytes to compare. We use
shift right to eliminate bits beyond the compare length.
+ This allows the use of word subtract to compute the final result.
However it may not be safe to load rWORD2 which may be beyond the
string length. So we compare the bit length of the remainder to
the right shift count (rSHR). If the bit count is less than or equal
we do not need to load rWORD2 (all significant bits are already in
- rB). */
- cmplw cr7,rN,rSHR
+ rWORD8_SHIFT). */
+ cmplw cr7, rN, rSHR
beq L(duZeroReturn)
- li rA,0
- ble cr7,L(dutrim)
- lwz rWORD2,4(rSTR2)
- srw rA,rWORD2,rSHR
+ li r0, 0
+ ble cr7, L(dutrim)
+#ifdef __LITTLE_ENDIAN__
+ lwbrx rWORD2, 0, rSTR2
+ addi rSTR2, rSTR2, 4
+#else
+ lwz rWORD2, 4(rSTR2)
+#endif
+ srw r0, rWORD2, rSHR
.align 4
L(dutrim):
- lwz rWORD1,4(rSTR1)
- lwz r31,48(1)
- subfic rN,rN,32 /* Shift count is 32 - (rN * 8). */
- or rWORD2,rA,rB
- lwz r30,44(1)
- lwz r29,40(r1)
- srw rWORD1,rWORD1,rN
- srw rWORD2,rWORD2,rN
- lwz r28,36(r1)
- lwz r27,32(r1)
- cmplw rWORD1,rWORD2
- li rRTN,0
- beq L(dureturn26)
- li rRTN,1
- bgt L(dureturn26)
- li rRTN,-1
+#ifdef __LITTLE_ENDIAN__
+ lwbrx rWORD1, 0, rSTR1
+#else
+ lwz rWORD1, 4(rSTR1)
+#endif
+ lwz rWORD8, 48(r1)
+ subfic rN, rN, 32 /* Shift count is 32 - (rN * 8). */
+ or rWORD2, r0, rWORD8_SHIFT
+ lwz rWORD7, 44(r1)
+ lwz rSHL, 40(r1)
+ srw rWORD1, rWORD1, rN
+ srw rWORD2, rWORD2, rN
+ lwz rSHR, 36(r1)
+ lwz rWORD8_SHIFT, 32(r1)
+ sub rRTN, rWORD1, rWORD2
b L(dureturn26)
.align 4
-L(duLcr0):
- lwz r31,48(1)
- lwz r30,44(1)
- li rRTN,1
- bgt cr0,L(dureturn29)
- lwz r29,40(r1)
- lwz r28,36(r1)
- li rRTN,-1
+L(duLcr7):
+ lwz rWORD8, 48(r1)
+ lwz rWORD7, 44(r1)
+ li rRTN, 1
+ bgt cr7, L(dureturn29)
+ lwz rSHL, 40(r1)
+ lwz rSHR, 36(r1)
+ li rRTN, -1
b L(dureturn27)
.align 4
L(duLcr1):
- lwz r31,48(1)
- lwz r30,44(1)
- li rRTN,1
- bgt cr1,L(dureturn29)
- lwz r29,40(r1)
- lwz r28,36(r1)
- li rRTN,-1
+ lwz rWORD8, 48(r1)
+ lwz rWORD7, 44(r1)
+ li rRTN, 1
+ bgt cr1, L(dureturn29)
+ lwz rSHL, 40(r1)
+ lwz rSHR, 36(r1)
+ li rRTN, -1
b L(dureturn27)
.align 4
L(duLcr6):
- lwz r31,48(1)
- lwz r30,44(1)
- li rRTN,1
- bgt cr6,L(dureturn29)
- lwz r29,40(r1)
- lwz r28,36(r1)
- li rRTN,-1
+ lwz rWORD8, 48(r1)
+ lwz rWORD7, 44(r1)
+ li rRTN, 1
+ bgt cr6, L(dureturn29)
+ lwz rSHL, 40(r1)
+ lwz rSHR, 36(r1)
+ li rRTN, -1
b L(dureturn27)
.align 4
L(duLcr5):
- lwz r31,48(1)
- lwz r30,44(1)
- li rRTN,1
- bgt cr5,L(dureturn29)
- lwz r29,40(r1)
- lwz r28,36(r1)
- li rRTN,-1
+ lwz rWORD8, 48(r1)
+ lwz rWORD7, 44(r1)
+ li rRTN, 1
+ bgt cr5, L(dureturn29)
+ lwz rSHL, 40(r1)
+ lwz rSHR, 36(r1)
+ li rRTN, -1
b L(dureturn27)
.align 3
L(duZeroReturn):
- li rRTN,0
+ li rRTN, 0
.align 4
L(dureturn):
- lwz r31,48(1)
- lwz r30,44(1)
+ lwz rWORD8, 48(r1)
+ lwz rWORD7, 44(r1)
L(dureturn29):
- lwz r29,40(r1)
- lwz r28,36(r1)
+ lwz rSHL, 40(r1)
+ lwz rSHR, 36(r1)
L(dureturn27):
- lwz r27,32(r1)
+ lwz rWORD8_SHIFT, 32(r1)
L(dureturn26):
- lwz r26,28(r1)
+ lwz rWORD2_SHIFT, 28(r1)
L(dureturn25):
- lwz r25,24(r1)
- lwz r24,20(r1)
- lwz 1,0(1)
+ lwz rWORD4_SHIFT, 24(r1)
+ lwz rWORD6_SHIFT, 20(r1)
+ addi r1, r1, 64
+ cfi_adjust_cfa_offset(-64)
blr
END (memcmp)
+
libc_hidden_builtin_def (memcmp)
-weak_alias (memcmp,bcmp)
+weak_alias (memcmp, bcmp)
diff --git a/sysdeps/powerpc/powerpc64/power4/memcmp.S b/sysdeps/powerpc/powerpc64/power4/memcmp.S
index 69caedc9ff..80d67c9aaa 100644
--- a/sysdeps/powerpc/powerpc64/power4/memcmp.S
+++ b/sysdeps/powerpc/powerpc64/power4/memcmp.S
@@ -1,4 +1,4 @@
-/* Optimized strcmp implementation for PowerPC64.
+/* Optimized memcmp implementation for PowerPC64.
Copyright (C) 2003-2013 Free Software Foundation, Inc.
This file is part of the GNU C Library.
@@ -18,13 +18,14 @@
#include <sysdep.h>
-/* int [r3] memcmp (const char *s1 [r3], const char *s2 [r4], size_t size [r5]) */
+/* int [r3] memcmp (const char *s1 [r3],
+ const char *s2 [r4],
+ size_t size [r5]) */
.machine power4
EALIGN (memcmp, 4, 0)
CALL_MCOUNT 3
-#define rTMP r0
#define rRTN r3
#define rSTR1 r3 /* first string arg */
#define rSTR2 r4 /* second string arg */
@@ -35,107 +36,127 @@ EALIGN (memcmp, 4, 0)
#define rWORD4 r9 /* next word in s2 */
#define rWORD5 r10 /* next word in s1 */
#define rWORD6 r11 /* next word in s2 */
-#define rBITDIF r12 /* bits that differ in s1 & s2 words */
#define rWORD7 r30 /* next word in s1 */
#define rWORD8 r31 /* next word in s2 */
- xor rTMP, rSTR2, rSTR1
+ xor r0, rSTR2, rSTR1
cmpldi cr6, rN, 0
cmpldi cr1, rN, 12
- clrldi. rTMP, rTMP, 61
- clrldi rBITDIF, rSTR1, 61
- cmpldi cr5, rBITDIF, 0
+ clrldi. r0, r0, 61
+ clrldi r12, rSTR1, 61
+ cmpldi cr5, r12, 0
beq- cr6, L(zeroLength)
- dcbt 0,rSTR1
- dcbt 0,rSTR2
+ dcbt 0, rSTR1
+ dcbt 0, rSTR2
/* If less than 8 bytes or not aligned, use the unaligned
byte loop. */
blt cr1, L(bytealigned)
- std rWORD8,-8(r1)
- cfi_offset(rWORD8,-8)
- std rWORD7,-16(r1)
- cfi_offset(rWORD7,-16)
+ std rWORD8, -8(r1)
+ cfi_offset(rWORD8, -8)
+ std rWORD7, -16(r1)
+ cfi_offset(rWORD7, -16)
bne L(unaligned)
/* At this point we know both strings have the same alignment and the
- compare length is at least 8 bytes. rBITDIF contains the low order
+ compare length is at least 8 bytes. r12 contains the low order
3 bits of rSTR1 and cr5 contains the result of the logical compare
- of rBITDIF to 0. If rBITDIF == 0 then we are already double word
- aligned and can perform the DWaligned loop.
+ of r12 to 0. If r12 == 0 then we are already double word
+ aligned and can perform the DW aligned loop.
Otherwise we know the two strings have the same alignment (but not
- yet DW). So we can force the string addresses to the next lower DW
- boundary and special case this first DW word using shift left to
+ yet DW). So we force the string addresses to the next lower DW
+ boundary and special case this first DW using shift left to
eliminate bits preceding the first byte. Since we want to join the
- normal (DWaligned) compare loop, starting at the second double word,
+ normal (DW aligned) compare loop, starting at the second double word,
we need to adjust the length (rN) and special case the loop
- versioning for the first DW. This insures that the loop count is
- correct and the first DW (shifted) is in the expected resister pair. */
- .align 4
+ versioning for the first DW. This ensures that the loop count is
+ correct and the first DW (shifted) is in the expected register pair. */
+ .align 4
L(samealignment):
clrrdi rSTR1, rSTR1, 3
clrrdi rSTR2, rSTR2, 3
beq cr5, L(DWaligned)
- add rN, rN, rBITDIF
- sldi r11, rBITDIF, 3
- srdi rTMP, rN, 5 /* Divide by 32 */
- andi. rBITDIF, rN, 24 /* Get the DW remainder */
+ add rN, rN, r12
+ sldi rWORD6, r12, 3
+ srdi r0, rN, 5 /* Divide by 32 */
+ andi. r12, rN, 24 /* Get the DW remainder */
+#ifdef __LITTLE_ENDIAN__
+ ldbrx rWORD1, 0, rSTR1
+ ldbrx rWORD2, 0, rSTR2
+ addi rSTR1, rSTR1, 8
+ addi rSTR2, rSTR2, 8
+#else
ld rWORD1, 0(rSTR1)
ld rWORD2, 0(rSTR2)
- cmpldi cr1, rBITDIF, 16
+#endif
+ cmpldi cr1, r12, 16
cmpldi cr7, rN, 32
clrldi rN, rN, 61
beq L(dPs4)
- mtctr rTMP /* Power4 wants mtctr 1st in dispatch group */
+ mtctr r0 /* Power4 wants mtctr 1st in dispatch group */
bgt cr1, L(dPs3)
beq cr1, L(dPs2)
/* Remainder is 8 */
- .align 3
+ .align 3
L(dsP1):
- sld rWORD5, rWORD1, r11
- sld rWORD6, rWORD2, r11
+ sld rWORD5, rWORD1, rWORD6
+ sld rWORD6, rWORD2, rWORD6
cmpld cr5, rWORD5, rWORD6
blt cr7, L(dP1x)
/* Do something useful in this cycle since we have to branch anyway. */
+#ifdef __LITTLE_ENDIAN__
+ ldbrx rWORD1, 0, rSTR1
+ ldbrx rWORD2, 0, rSTR2
+ addi rSTR1, rSTR1, 8
+ addi rSTR2, rSTR2, 8
+#else
ld rWORD1, 8(rSTR1)
ld rWORD2, 8(rSTR2)
- cmpld cr0, rWORD1, rWORD2
+#endif
+ cmpld cr7, rWORD1, rWORD2
b L(dP1e)
/* Remainder is 16 */
- .align 4
+ .align 4
L(dPs2):
- sld rWORD5, rWORD1, r11
- sld rWORD6, rWORD2, r11
+ sld rWORD5, rWORD1, rWORD6
+ sld rWORD6, rWORD2, rWORD6
cmpld cr6, rWORD5, rWORD6
blt cr7, L(dP2x)
/* Do something useful in this cycle since we have to branch anyway. */
+#ifdef __LITTLE_ENDIAN__
+ ldbrx rWORD7, 0, rSTR1
+ ldbrx rWORD8, 0, rSTR2
+ addi rSTR1, rSTR1, 8
+ addi rSTR2, rSTR2, 8
+#else
ld rWORD7, 8(rSTR1)
ld rWORD8, 8(rSTR2)
+#endif
cmpld cr5, rWORD7, rWORD8
b L(dP2e)
/* Remainder is 24 */
- .align 4
+ .align 4
L(dPs3):
- sld rWORD3, rWORD1, r11
- sld rWORD4, rWORD2, r11
+ sld rWORD3, rWORD1, rWORD6
+ sld rWORD4, rWORD2, rWORD6
cmpld cr1, rWORD3, rWORD4
b L(dP3e)
/* Count is a multiple of 32, remainder is 0 */
- .align 4
+ .align 4
L(dPs4):
- mtctr rTMP /* Power4 wants mtctr 1st in dispatch group */
- sld rWORD1, rWORD1, r11
- sld rWORD2, rWORD2, r11
- cmpld cr0, rWORD1, rWORD2
+ mtctr r0 /* Power4 wants mtctr 1st in dispatch group */
+ sld rWORD1, rWORD1, rWORD6
+ sld rWORD2, rWORD2, rWORD6
+ cmpld cr7, rWORD1, rWORD2
b L(dP4e)
/* At this point we know both strings are double word aligned and the
compare length is at least 8 bytes. */
- .align 4
+ .align 4
L(DWaligned):
- andi. rBITDIF, rN, 24 /* Get the DW remainder */
- srdi rTMP, rN, 5 /* Divide by 32 */
- cmpldi cr1, rBITDIF, 16
+ andi. r12, rN, 24 /* Get the DW remainder */
+ srdi r0, rN, 5 /* Divide by 32 */
+ cmpldi cr1, r12, 16
cmpldi cr7, rN, 32
clrldi rN, rN, 61
beq L(dP4)
@@ -143,174 +164,343 @@ L(DWaligned):
beq cr1, L(dP2)
/* Remainder is 8 */
- .align 4
+ .align 4
L(dP1):
- mtctr rTMP /* Power4 wants mtctr 1st in dispatch group */
+ mtctr r0 /* Power4 wants mtctr 1st in dispatch group */
/* Normally we'd use rWORD7/rWORD8 here, but since we might exit early
(8-15 byte compare), we want to use only volatile registers. This
means we can avoid restoring non-volatile registers since we did not
change any on the early exit path. The key here is the non-early
exit path only cares about the condition code (cr5), not about which
register pair was used. */
+#ifdef __LITTLE_ENDIAN__
+ ldbrx rWORD5, 0, rSTR1
+ ldbrx rWORD6, 0, rSTR2
+ addi rSTR1, rSTR1, 8
+ addi rSTR2, rSTR2, 8
+#else
ld rWORD5, 0(rSTR1)
ld rWORD6, 0(rSTR2)
+#endif
cmpld cr5, rWORD5, rWORD6
blt cr7, L(dP1x)
+#ifdef __LITTLE_ENDIAN__
+ ldbrx rWORD1, 0, rSTR1
+ ldbrx rWORD2, 0, rSTR2
+ addi rSTR1, rSTR1, 8
+ addi rSTR2, rSTR2, 8
+#else
ld rWORD1, 8(rSTR1)
ld rWORD2, 8(rSTR2)
- cmpld cr0, rWORD1, rWORD2
+#endif
+ cmpld cr7, rWORD1, rWORD2
L(dP1e):
+#ifdef __LITTLE_ENDIAN__
+ ldbrx rWORD3, 0, rSTR1
+ ldbrx rWORD4, 0, rSTR2
+ addi rSTR1, rSTR1, 8
+ addi rSTR2, rSTR2, 8
+#else
ld rWORD3, 16(rSTR1)
ld rWORD4, 16(rSTR2)
+#endif
cmpld cr1, rWORD3, rWORD4
+#ifdef __LITTLE_ENDIAN__
+ ldbrx rWORD5, 0, rSTR1
+ ldbrx rWORD6, 0, rSTR2
+ addi rSTR1, rSTR1, 8
+ addi rSTR2, rSTR2, 8
+#else
ld rWORD5, 24(rSTR1)
ld rWORD6, 24(rSTR2)
+#endif
cmpld cr6, rWORD5, rWORD6
- bne cr5, L(dLcr5)
- bne cr0, L(dLcr0)
+ bne cr5, L(dLcr5x)
+ bne cr7, L(dLcr7x)
+#ifdef __LITTLE_ENDIAN__
+ ldbrx rWORD7, 0, rSTR1
+ ldbrx rWORD8, 0, rSTR2
+ addi rSTR1, rSTR1, 8
+ addi rSTR2, rSTR2, 8
+#else
ldu rWORD7, 32(rSTR1)
ldu rWORD8, 32(rSTR2)
+#endif
bne cr1, L(dLcr1)
cmpld cr5, rWORD7, rWORD8
bdnz L(dLoop)
bne cr6, L(dLcr6)
- ld rWORD8,-8(r1)
- ld rWORD7,-16(r1)
- .align 3
+ ld rWORD8, -8(r1)
+ ld rWORD7, -16(r1)
+ .align 3
L(dP1x):
sldi. r12, rN, 3
- bne cr5, L(dLcr5)
+ bne cr5, L(dLcr5x)
subfic rN, r12, 64 /* Shift count is 64 - (rN * 8). */
bne L(d00)
li rRTN, 0
blr
/* Remainder is 16 */
- .align 4
+ .align 4
L(dP2):
- mtctr rTMP /* Power4 wants mtctr 1st in dispatch group */
+ mtctr r0 /* Power4 wants mtctr 1st in dispatch group */
+#ifdef __LITTLE_ENDIAN__
+ ldbrx rWORD5, 0, rSTR1
+ ldbrx rWORD6, 0, rSTR2
+ addi rSTR1, rSTR1, 8
+ addi rSTR2, rSTR2, 8
+#else
ld rWORD5, 0(rSTR1)
ld rWORD6, 0(rSTR2)
+#endif
cmpld cr6, rWORD5, rWORD6
blt cr7, L(dP2x)
+#ifdef __LITTLE_ENDIAN__
+ ldbrx rWORD7, 0, rSTR1
+ ldbrx rWORD8, 0, rSTR2
+ addi rSTR1, rSTR1, 8
+ addi rSTR2, rSTR2, 8
+#else
ld rWORD7, 8(rSTR1)
ld rWORD8, 8(rSTR2)
+#endif
cmpld cr5, rWORD7, rWORD8
L(dP2e):
+#ifdef __LITTLE_ENDIAN__
+ ldbrx rWORD1, 0, rSTR1
+ ldbrx rWORD2, 0, rSTR2
+ addi rSTR1, rSTR1, 8
+ addi rSTR2, rSTR2, 8
+#else
ld rWORD1, 16(rSTR1)
ld rWORD2, 16(rSTR2)
- cmpld cr0, rWORD1, rWORD2
+#endif
+ cmpld cr7, rWORD1, rWORD2
+#ifdef __LITTLE_ENDIAN__
+ ldbrx rWORD3, 0, rSTR1
+ ldbrx rWORD4, 0, rSTR2
+ addi rSTR1, rSTR1, 8
+ addi rSTR2, rSTR2, 8
+#else
ld rWORD3, 24(rSTR1)
ld rWORD4, 24(rSTR2)
+#endif
cmpld cr1, rWORD3, rWORD4
+#ifndef __LITTLE_ENDIAN__
addi rSTR1, rSTR1, 8
addi rSTR2, rSTR2, 8
+#endif
bne cr6, L(dLcr6)
bne cr5, L(dLcr5)
b L(dLoop2)
/* Again we are on a early exit path (16-23 byte compare), we want to
only use volatile registers and avoid restoring non-volatile
registers. */
- .align 4
+ .align 4
L(dP2x):
+#ifdef __LITTLE_ENDIAN__
+ ldbrx rWORD3, 0, rSTR1
+ ldbrx rWORD4, 0, rSTR2
+ addi rSTR1, rSTR1, 8
+ addi rSTR2, rSTR2, 8
+#else
ld rWORD3, 8(rSTR1)
ld rWORD4, 8(rSTR2)
- cmpld cr5, rWORD3, rWORD4
+#endif
+ cmpld cr1, rWORD3, rWORD4
sldi. r12, rN, 3
- bne cr6, L(dLcr6)
+ bne cr6, L(dLcr6x)
+#ifndef __LITTLE_ENDIAN__
addi rSTR1, rSTR1, 8
addi rSTR2, rSTR2, 8
- bne cr5, L(dLcr5)
+#endif
+ bne cr1, L(dLcr1x)
subfic rN, r12, 64 /* Shift count is 64 - (rN * 8). */
bne L(d00)
li rRTN, 0
blr
/* Remainder is 24 */
- .align 4
+ .align 4
L(dP3):
- mtctr rTMP /* Power4 wants mtctr 1st in dispatch group */
+ mtctr r0 /* Power4 wants mtctr 1st in dispatch group */
+#ifdef __LITTLE_ENDIAN__
+ ldbrx rWORD3, 0, rSTR1
+ ldbrx rWORD4, 0, rSTR2
+ addi rSTR1, rSTR1, 8
+ addi rSTR2, rSTR2, 8
+#else
ld rWORD3, 0(rSTR1)
ld rWORD4, 0(rSTR2)
+#endif
cmpld cr1, rWORD3, rWORD4
L(dP3e):
+#ifdef __LITTLE_ENDIAN__
+ ldbrx rWORD5, 0, rSTR1
+ ldbrx rWORD6, 0, rSTR2
+ addi rSTR1, rSTR1, 8
+ addi rSTR2, rSTR2, 8
+#else
ld rWORD5, 8(rSTR1)
ld rWORD6, 8(rSTR2)
+#endif
cmpld cr6, rWORD5, rWORD6
blt cr7, L(dP3x)
+#ifdef __LITTLE_ENDIAN__
+ ldbrx rWORD7, 0, rSTR1
+ ldbrx rWORD8, 0, rSTR2
+ addi rSTR1, rSTR1, 8
+ addi rSTR2, rSTR2, 8
+#else
ld rWORD7, 16(rSTR1)
ld rWORD8, 16(rSTR2)
+#endif
cmpld cr5, rWORD7, rWORD8
+#ifdef __LITTLE_ENDIAN__
+ ldbrx rWORD1, 0, rSTR1
+ ldbrx rWORD2, 0, rSTR2
+ addi rSTR1, rSTR1, 8
+ addi rSTR2, rSTR2, 8
+#else
ld rWORD1, 24(rSTR1)
ld rWORD2, 24(rSTR2)
- cmpld cr0, rWORD1, rWORD2
+#endif
+ cmpld cr7, rWORD1, rWORD2
+#ifndef __LITTLE_ENDIAN__
addi rSTR1, rSTR1, 16
addi rSTR2, rSTR2, 16
+#endif
bne cr1, L(dLcr1)
bne cr6, L(dLcr6)
b L(dLoop1)
/* Again we are on a early exit path (24-31 byte compare), we want to
only use volatile registers and avoid restoring non-volatile
registers. */
- .align 4
+ .align 4
L(dP3x):
+#ifdef __LITTLE_ENDIAN__
+ ldbrx rWORD1, 0, rSTR1
+ ldbrx rWORD2, 0, rSTR2
+ addi rSTR1, rSTR1, 8
+ addi rSTR2, rSTR2, 8
+#else
ld rWORD1, 16(rSTR1)
ld rWORD2, 16(rSTR2)
- cmpld cr5, rWORD1, rWORD2
+#endif
+ cmpld cr7, rWORD1, rWORD2
sldi. r12, rN, 3
- bne cr1, L(dLcr1)
+ bne cr1, L(dLcr1x)
+#ifndef __LITTLE_ENDIAN__
addi rSTR1, rSTR1, 16
addi rSTR2, rSTR2, 16
- bne cr6, L(dLcr6)
+#endif
+ bne cr6, L(dLcr6x)
subfic rN, r12, 64 /* Shift count is 64 - (rN * 8). */
- bne cr5, L(dLcr5)
+ bne cr7, L(dLcr7x)
bne L(d00)
li rRTN, 0
blr
/* Count is a multiple of 32, remainder is 0 */
- .align 4
+ .align 4
L(dP4):
- mtctr rTMP /* Power4 wants mtctr 1st in dispatch group */
+ mtctr r0 /* Power4 wants mtctr 1st in dispatch group */
+#ifdef __LITTLE_ENDIAN__
+ ldbrx rWORD1, 0, rSTR1
+ ldbrx rWORD2, 0, rSTR2
+ addi rSTR1, rSTR1, 8
+ addi rSTR2, rSTR2, 8
+#else
ld rWORD1, 0(rSTR1)
ld rWORD2, 0(rSTR2)
- cmpld cr0, rWORD1, rWORD2
+#endif
+ cmpld cr7, rWORD1, rWORD2
L(dP4e):
+#ifdef __LITTLE_ENDIAN__
+ ldbrx rWORD3, 0, rSTR1
+ ldbrx rWORD4, 0, rSTR2
+ addi rSTR1, rSTR1, 8
+ addi rSTR2, rSTR2, 8
+#else
ld rWORD3, 8(rSTR1)
ld rWORD4, 8(rSTR2)
+#endif
cmpld cr1, rWORD3, rWORD4
+#ifdef __LITTLE_ENDIAN__
+ ldbrx rWORD5, 0, rSTR1
+ ldbrx rWORD6, 0, rSTR2
+ addi rSTR1, rSTR1, 8
+ addi rSTR2, rSTR2, 8
+#else
ld rWORD5, 16(rSTR1)
ld rWORD6, 16(rSTR2)
+#endif
cmpld cr6, rWORD5, rWORD6
+#ifdef __LITTLE_ENDIAN__
+ ldbrx rWORD7, 0, rSTR1
+ ldbrx rWORD8, 0, rSTR2
+ addi rSTR1, rSTR1, 8
+ addi rSTR2, rSTR2, 8
+#else
ldu rWORD7, 24(rSTR1)
ldu rWORD8, 24(rSTR2)
+#endif
cmpld cr5, rWORD7, rWORD8
- bne cr0, L(dLcr0)
+ bne cr7, L(dLcr7)
bne cr1, L(dLcr1)
bdz- L(d24) /* Adjust CTR as we start with +4 */
/* This is the primary loop */
- .align 4
+ .align 4
L(dLoop):
+#ifdef __LITTLE_ENDIAN__
+ ldbrx rWORD1, 0, rSTR1
+ ldbrx rWORD2, 0, rSTR2
+ addi rSTR1, rSTR1, 8
+ addi rSTR2, rSTR2, 8
+#else
ld rWORD1, 8(rSTR1)
ld rWORD2, 8(rSTR2)
+#endif
cmpld cr1, rWORD3, rWORD4
bne cr6, L(dLcr6)
L(dLoop1):
+#ifdef __LITTLE_ENDIAN__
+ ldbrx rWORD3, 0, rSTR1
+ ldbrx rWORD4, 0, rSTR2
+ addi rSTR1, rSTR1, 8
+ addi rSTR2, rSTR2, 8
+#else
ld rWORD3, 16(rSTR1)
ld rWORD4, 16(rSTR2)
+#endif
cmpld cr6, rWORD5, rWORD6
bne cr5, L(dLcr5)
L(dLoop2):
+#ifdef __LITTLE_ENDIAN__
+ ldbrx rWORD5, 0, rSTR1
+ ldbrx rWORD6, 0, rSTR2
+ addi rSTR1, rSTR1, 8
+ addi rSTR2, rSTR2, 8
+#else
ld rWORD5, 24(rSTR1)
ld rWORD6, 24(rSTR2)
+#endif
cmpld cr5, rWORD7, rWORD8
- bne cr0, L(dLcr0)
+ bne cr7, L(dLcr7)
L(dLoop3):
+#ifdef __LITTLE_ENDIAN__
+ ldbrx rWORD7, 0, rSTR1
+ ldbrx rWORD8, 0, rSTR2
+ addi rSTR1, rSTR1, 8
+ addi rSTR2, rSTR2, 8
+#else
ldu rWORD7, 32(rSTR1)
ldu rWORD8, 32(rSTR2)
+#endif
bne- cr1, L(dLcr1)
- cmpld cr0, rWORD1, rWORD2
+ cmpld cr7, rWORD1, rWORD2
bdnz+ L(dLoop)
L(dL4):
@@ -320,7 +510,7 @@ L(dL4):
bne cr5, L(dLcr5)
cmpld cr5, rWORD7, rWORD8
L(d44):
- bne cr0, L(dLcr0)
+ bne cr7, L(dLcr7)
L(d34):
bne cr1, L(dLcr1)
L(d24):
@@ -329,60 +519,74 @@ L(d14):
sldi. r12, rN, 3
bne cr5, L(dLcr5)
L(d04):
- ld rWORD8,-8(r1)
- ld rWORD7,-16(r1)
+ ld rWORD8, -8(r1)
+ ld rWORD7, -16(r1)
subfic rN, r12, 64 /* Shift count is 64 - (rN * 8). */
beq L(zeroLength)
/* At this point we have a remainder of 1 to 7 bytes to compare. Since
we are aligned it is safe to load the whole double word, and use
shift right double to eliminate bits beyond the compare length. */
L(d00):
+#ifdef __LITTLE_ENDIAN__
+ ldbrx rWORD1, 0, rSTR1
+ ldbrx rWORD2, 0, rSTR2
+ addi rSTR1, rSTR1, 8
+ addi rSTR2, rSTR2, 8
+#else
ld rWORD1, 8(rSTR1)
ld rWORD2, 8(rSTR2)
+#endif
srd rWORD1, rWORD1, rN
srd rWORD2, rWORD2, rN
- cmpld cr5, rWORD1, rWORD2
- bne cr5, L(dLcr5x)
+ cmpld cr7, rWORD1, rWORD2
+ bne cr7, L(dLcr7x)
li rRTN, 0
blr
- .align 4
-L(dLcr0):
- ld rWORD8,-8(r1)
- ld rWORD7,-16(r1)
+
+ .align 4
+L(dLcr7):
+ ld rWORD8, -8(r1)
+ ld rWORD7, -16(r1)
+L(dLcr7x):
li rRTN, 1
- bgtlr cr0
+ bgtlr cr7
li rRTN, -1
blr
- .align 4
+ .align 4
L(dLcr1):
- ld rWORD8,-8(r1)
- ld rWORD7,-16(r1)
+ ld rWORD8, -8(r1)
+ ld rWORD7, -16(r1)
+L(dLcr1x):
li rRTN, 1
bgtlr cr1
li rRTN, -1
blr
- .align 4
+ .align 4
L(dLcr6):
- ld rWORD8,-8(r1)
- ld rWORD7,-16(r1)
+ ld rWORD8, -8(r1)
+ ld rWORD7, -16(r1)
+L(dLcr6x):
li rRTN, 1
bgtlr cr6
li rRTN, -1
blr
- .align 4
+ .align 4
L(dLcr5):
- ld rWORD8,-8(r1)
- ld rWORD7,-16(r1)
+ ld rWORD8, -8(r1)
+ ld rWORD7, -16(r1)
L(dLcr5x):
li rRTN, 1
bgtlr cr5
li rRTN, -1
blr
- .align 4
+ .align 4
L(bytealigned):
- mtctr rN /* Power4 wants mtctr 1st in dispatch group */
+ mtctr rN /* Power4 wants mtctr 1st in dispatch group */
+#if 0
+/* Huh? We've already branched on cr6! */
beq- cr6, L(zeroLength)
+#endif
/* We need to prime this loop. This loop is swing modulo scheduled
to avoid pipe delays. The dependent instruction latencies (load to
@@ -397,7 +601,7 @@ L(bytealigned):
lbz rWORD1, 0(rSTR1)
lbz rWORD2, 0(rSTR2)
bdz- L(b11)
- cmpld cr0, rWORD1, rWORD2
+ cmpld cr7, rWORD1, rWORD2
lbz rWORD3, 1(rSTR1)
lbz rWORD4, 1(rSTR2)
bdz- L(b12)
@@ -405,11 +609,11 @@ L(bytealigned):
lbzu rWORD5, 2(rSTR1)
lbzu rWORD6, 2(rSTR2)
bdz- L(b13)
- .align 4
+ .align 4
L(bLoop):
lbzu rWORD1, 1(rSTR1)
lbzu rWORD2, 1(rSTR2)
- bne- cr0, L(bLcr0)
+ bne- cr7, L(bLcr7)
cmpld cr6, rWORD5, rWORD6
bdz- L(b3i)
@@ -418,7 +622,7 @@ L(bLoop):
lbzu rWORD4, 1(rSTR2)
bne- cr1, L(bLcr1)
- cmpld cr0, rWORD1, rWORD2
+ cmpld cr7, rWORD1, rWORD2
bdz- L(b2i)
lbzu rWORD5, 1(rSTR1)
@@ -435,23 +639,23 @@ L(bLoop):
tested. In this case we must complete the pending operations
before returning. */
L(b1i):
- bne- cr0, L(bLcr0)
+ bne- cr7, L(bLcr7)
bne- cr1, L(bLcr1)
b L(bx56)
- .align 4
+ .align 4
L(b2i):
bne- cr6, L(bLcr6)
- bne- cr0, L(bLcr0)
+ bne- cr7, L(bLcr7)
b L(bx34)
- .align 4
+ .align 4
L(b3i):
bne- cr1, L(bLcr1)
bne- cr6, L(bLcr6)
b L(bx12)
- .align 4
-L(bLcr0):
+ .align 4
+L(bLcr7):
li rRTN, 1
- bgtlr cr0
+ bgtlr cr7
li rRTN, -1
blr
L(bLcr1):
@@ -466,14 +670,14 @@ L(bLcr6):
blr
L(b13):
- bne- cr0, L(bx12)
+ bne- cr7, L(bx12)
bne- cr1, L(bx34)
L(bx56):
sub rRTN, rWORD5, rWORD6
blr
nop
L(b12):
- bne- cr0, L(bx12)
+ bne- cr7, L(bx12)
L(bx34):
sub rRTN, rWORD3, rWORD4
blr
@@ -481,101 +685,106 @@ L(b11):
L(bx12):
sub rRTN, rWORD1, rWORD2
blr
- .align 4
-L(zeroLengthReturn):
- ld rWORD8,-8(r1)
- ld rWORD7,-16(r1)
+ .align 4
L(zeroLength):
li rRTN, 0
blr
- .align 4
+ .align 4
/* At this point we know the strings have different alignment and the
- compare length is at least 8 bytes. rBITDIF contains the low order
+ compare length is at least 8 bytes. r12 contains the low order
3 bits of rSTR1 and cr5 contains the result of the logical compare
- of rBITDIF to 0. If rBITDIF == 0 then rStr1 is double word
+ of r12 to 0. If r12 == 0 then rStr1 is double word
aligned and can perform the DWunaligned loop.
Otherwise we know that rSTR1 is not already DW aligned yet.
So we can force the string addresses to the next lower DW
- boundary and special case this first DW word using shift left to
+ boundary and special case this first DW using shift left to
eliminate bits preceding the first byte. Since we want to join the
normal (DWaligned) compare loop, starting at the second double word,
we need to adjust the length (rN) and special case the loop
- versioning for the first DW. This insures that the loop count is
+ versioning for the first DW. This ensures that the loop count is
correct and the first DW (shifted) is in the expected resister pair. */
-#define rSHL r29 /* Unaligned shift left count. */
-#define rSHR r28 /* Unaligned shift right count. */
-#define rB r27 /* Left rotation temp for rWORD2. */
-#define rD r26 /* Left rotation temp for rWORD4. */
-#define rF r25 /* Left rotation temp for rWORD6. */
-#define rH r24 /* Left rotation temp for rWORD8. */
-#define rA r0 /* Right rotation temp for rWORD2. */
-#define rC r12 /* Right rotation temp for rWORD4. */
-#define rE r0 /* Right rotation temp for rWORD6. */
-#define rG r12 /* Right rotation temp for rWORD8. */
+#define rSHL r29 /* Unaligned shift left count. */
+#define rSHR r28 /* Unaligned shift right count. */
+#define rWORD8_SHIFT r27 /* Left rotation temp for rWORD2. */
+#define rWORD2_SHIFT r26 /* Left rotation temp for rWORD4. */
+#define rWORD4_SHIFT r25 /* Left rotation temp for rWORD6. */
+#define rWORD6_SHIFT r24 /* Left rotation temp for rWORD8. */
L(unaligned):
- std r29,-24(r1)
- cfi_offset(r29,-24)
+ std rSHL, -24(r1)
+ cfi_offset(rSHL, -24)
clrldi rSHL, rSTR2, 61
beq- cr6, L(duzeroLength)
- std r28,-32(r1)
- cfi_offset(r28,-32)
+ std rSHR, -32(r1)
+ cfi_offset(rSHR, -32)
beq cr5, L(DWunaligned)
- std r27,-40(r1)
- cfi_offset(r27,-40)
-/* Adjust the logical start of rSTR2 ro compensate for the extra bits
+ std rWORD8_SHIFT, -40(r1)
+ cfi_offset(rWORD8_SHIFT, -40)
+/* Adjust the logical start of rSTR2 to compensate for the extra bits
in the 1st rSTR1 DW. */
- sub r27, rSTR2, rBITDIF
+ sub rWORD8_SHIFT, rSTR2, r12
/* But do not attempt to address the DW before that DW that contains
the actual start of rSTR2. */
clrrdi rSTR2, rSTR2, 3
- std r26,-48(r1)
- cfi_offset(r26,-48)
-/* Compute the left/right shift counts for the unalign rSTR2,
+ std rWORD2_SHIFT, -48(r1)
+ cfi_offset(rWORD2_SHIFT, -48)
+/* Compute the left/right shift counts for the unaligned rSTR2,
compensating for the logical (DW aligned) start of rSTR1. */
- clrldi rSHL, r27, 61
+ clrldi rSHL, rWORD8_SHIFT, 61
clrrdi rSTR1, rSTR1, 3
- std r25,-56(r1)
- cfi_offset(r25,-56)
+ std rWORD4_SHIFT, -56(r1)
+ cfi_offset(rWORD4_SHIFT, -56)
sldi rSHL, rSHL, 3
- cmpld cr5, r27, rSTR2
- add rN, rN, rBITDIF
- sldi r11, rBITDIF, 3
- std r24,-64(r1)
- cfi_offset(r24,-64)
+ cmpld cr5, rWORD8_SHIFT, rSTR2
+ add rN, rN, r12
+ sldi rWORD6, r12, 3
+ std rWORD6_SHIFT, -64(r1)
+ cfi_offset(rWORD6_SHIFT, -64)
subfic rSHR, rSHL, 64
- srdi rTMP, rN, 5 /* Divide by 32 */
- andi. rBITDIF, rN, 24 /* Get the DW remainder */
+ srdi r0, rN, 5 /* Divide by 32 */
+ andi. r12, rN, 24 /* Get the DW remainder */
/* We normally need to load 2 DWs to start the unaligned rSTR2, but in
this special case those bits may be discarded anyway. Also we
must avoid loading a DW where none of the bits are part of rSTR2 as
this may cross a page boundary and cause a page fault. */
li rWORD8, 0
blt cr5, L(dus0)
+#ifdef __LITTLE_ENDIAN__
+ ldbrx rWORD8, 0, rSTR2
+ addi rSTR2, rSTR2, 8
+#else
ld rWORD8, 0(rSTR2)
- la rSTR2, 8(rSTR2)
+ addi rSTR2, rSTR2, 8
+#endif
sld rWORD8, rWORD8, rSHL
L(dus0):
+#ifdef __LITTLE_ENDIAN__
+ ldbrx rWORD1, 0, rSTR1
+ ldbrx rWORD2, 0, rSTR2
+ addi rSTR1, rSTR1, 8
+ addi rSTR2, rSTR2, 8
+#else
ld rWORD1, 0(rSTR1)
ld rWORD2, 0(rSTR2)
- cmpldi cr1, rBITDIF, 16
+#endif
+ cmpldi cr1, r12, 16
cmpldi cr7, rN, 32
- srd rG, rWORD2, rSHR
+ srd r12, rWORD2, rSHR
clrldi rN, rN, 61
beq L(duPs4)
- mtctr rTMP /* Power4 wants mtctr 1st in dispatch group */
- or rWORD8, rG, rWORD8
+ mtctr r0 /* Power4 wants mtctr 1st in dispatch group */
+ or rWORD8, r12, rWORD8
bgt cr1, L(duPs3)
beq cr1, L(duPs2)
/* Remainder is 8 */
- .align 4
+ .align 4
L(dusP1):
- sld rB, rWORD2, rSHL
- sld rWORD7, rWORD1, r11
- sld rWORD8, rWORD8, r11
+ sld rWORD8_SHIFT, rWORD2, rSHL
+ sld rWORD7, rWORD1, rWORD6
+ sld rWORD8, rWORD8, rWORD6
bge cr7, L(duP1e)
/* At this point we exit early with the first double word compare
complete and remainder of 0 to 7 bytes. See L(du14) for details on
@@ -585,95 +794,133 @@ L(dusP1):
bne cr5, L(duLcr5)
cmpld cr7, rN, rSHR
beq L(duZeroReturn)
- li rA, 0
+ li r0, 0
ble cr7, L(dutrim)
+#ifdef __LITTLE_ENDIAN__
+ ldbrx rWORD2, 0, rSTR2
+ addi rSTR2, rSTR2, 8
+#else
ld rWORD2, 8(rSTR2)
- srd rA, rWORD2, rSHR
+#endif
+ srd r0, rWORD2, rSHR
b L(dutrim)
/* Remainder is 16 */
- .align 4
+ .align 4
L(duPs2):
- sld rH, rWORD2, rSHL
- sld rWORD5, rWORD1, r11
- sld rWORD6, rWORD8, r11
+ sld rWORD6_SHIFT, rWORD2, rSHL
+ sld rWORD5, rWORD1, rWORD6
+ sld rWORD6, rWORD8, rWORD6
b L(duP2e)
/* Remainder is 24 */
- .align 4
+ .align 4
L(duPs3):
- sld rF, rWORD2, rSHL
- sld rWORD3, rWORD1, r11
- sld rWORD4, rWORD8, r11
+ sld rWORD4_SHIFT, rWORD2, rSHL
+ sld rWORD3, rWORD1, rWORD6
+ sld rWORD4, rWORD8, rWORD6
b L(duP3e)
/* Count is a multiple of 32, remainder is 0 */
- .align 4
+ .align 4
L(duPs4):
- mtctr rTMP /* Power4 wants mtctr 1st in dispatch group */
- or rWORD8, rG, rWORD8
- sld rD, rWORD2, rSHL
- sld rWORD1, rWORD1, r11
- sld rWORD2, rWORD8, r11
+ mtctr r0 /* Power4 wants mtctr 1st in dispatch group */
+ or rWORD8, r12, rWORD8
+ sld rWORD2_SHIFT, rWORD2, rSHL
+ sld rWORD1, rWORD1, rWORD6
+ sld rWORD2, rWORD8, rWORD6
b L(duP4e)
/* At this point we know rSTR1 is double word aligned and the
compare length is at least 8 bytes. */
- .align 4
+ .align 4
L(DWunaligned):
- std r27,-40(r1)
- cfi_offset(r27,-40)
+ std rWORD8_SHIFT, -40(r1)
+ cfi_offset(rWORD8_SHIFT, -40)
clrrdi rSTR2, rSTR2, 3
- std r26,-48(r1)
- cfi_offset(r26,-48)
- srdi rTMP, rN, 5 /* Divide by 32 */
- std r25,-56(r1)
- cfi_offset(r25,-56)
- andi. rBITDIF, rN, 24 /* Get the DW remainder */
- std r24,-64(r1)
- cfi_offset(r24,-64)
+ std rWORD2_SHIFT, -48(r1)
+ cfi_offset(rWORD2_SHIFT, -48)
+ srdi r0, rN, 5 /* Divide by 32 */
+ std rWORD4_SHIFT, -56(r1)
+ cfi_offset(rWORD4_SHIFT, -56)
+ andi. r12, rN, 24 /* Get the DW remainder */
+ std rWORD6_SHIFT, -64(r1)
+ cfi_offset(rWORD6_SHIFT, -64)
sldi rSHL, rSHL, 3
+#ifdef __LITTLE_ENDIAN__
+ ldbrx rWORD6, 0, rSTR2
+ addi rSTR2, rSTR2, 8
+ ldbrx rWORD8, 0, rSTR2
+ addi rSTR2, rSTR2, 8
+#else
ld rWORD6, 0(rSTR2)
ldu rWORD8, 8(rSTR2)
- cmpldi cr1, rBITDIF, 16
+#endif
+ cmpldi cr1, r12, 16
cmpldi cr7, rN, 32
clrldi rN, rN, 61
subfic rSHR, rSHL, 64
- sld rH, rWORD6, rSHL
+ sld rWORD6_SHIFT, rWORD6, rSHL
beq L(duP4)
- mtctr rTMP /* Power4 wants mtctr 1st in dispatch group */
+ mtctr r0 /* Power4 wants mtctr 1st in dispatch group */
bgt cr1, L(duP3)
beq cr1, L(duP2)
/* Remainder is 8 */
- .align 4
+ .align 4
L(duP1):
- srd rG, rWORD8, rSHR
+ srd r12, rWORD8, rSHR
+#ifdef __LITTLE_ENDIAN__
+ ldbrx rWORD7, 0, rSTR1
+ addi rSTR1, rSTR1, 8
+#else
ld rWORD7, 0(rSTR1)
- sld rB, rWORD8, rSHL
- or rWORD8, rG, rH
+#endif
+ sld rWORD8_SHIFT, rWORD8, rSHL
+ or rWORD8, r12, rWORD6_SHIFT
blt cr7, L(duP1x)
L(duP1e):
+#ifdef __LITTLE_ENDIAN__
+ ldbrx rWORD1, 0, rSTR1
+ ldbrx rWORD2, 0, rSTR2
+ addi rSTR1, rSTR1, 8
+ addi rSTR2, rSTR2, 8
+#else
ld rWORD1, 8(rSTR1)
ld rWORD2, 8(rSTR2)
+#endif
cmpld cr5, rWORD7, rWORD8
- srd rA, rWORD2, rSHR
- sld rD, rWORD2, rSHL
- or rWORD2, rA, rB
+ srd r0, rWORD2, rSHR
+ sld rWORD2_SHIFT, rWORD2, rSHL
+ or rWORD2, r0, rWORD8_SHIFT
+#ifdef __LITTLE_ENDIAN__
+ ldbrx rWORD3, 0, rSTR1
+ ldbrx rWORD4, 0, rSTR2
+ addi rSTR1, rSTR1, 8
+ addi rSTR2, rSTR2, 8
+#else
ld rWORD3, 16(rSTR1)
ld rWORD4, 16(rSTR2)
- cmpld cr0, rWORD1, rWORD2
- srd rC, rWORD4, rSHR
- sld rF, rWORD4, rSHL
+#endif
+ cmpld cr7, rWORD1, rWORD2
+ srd r12, rWORD4, rSHR
+ sld rWORD4_SHIFT, rWORD4, rSHL
bne cr5, L(duLcr5)
- or rWORD4, rC, rD
+ or rWORD4, r12, rWORD2_SHIFT
+#ifdef __LITTLE_ENDIAN__
+ ldbrx rWORD5, 0, rSTR1
+ ldbrx rWORD6, 0, rSTR2
+ addi rSTR1, rSTR1, 8
+ addi rSTR2, rSTR2, 8
+#else
ld rWORD5, 24(rSTR1)
ld rWORD6, 24(rSTR2)
+#endif
cmpld cr1, rWORD3, rWORD4
- srd rE, rWORD6, rSHR
- sld rH, rWORD6, rSHL
- bne cr0, L(duLcr0)
- or rWORD6, rE, rF
+ srd r0, rWORD6, rSHR
+ sld rWORD6_SHIFT, rWORD6, rSHL
+ bne cr7, L(duLcr7)
+ or rWORD6, r0, rWORD4_SHIFT
cmpld cr6, rWORD5, rWORD6
b L(duLoop3)
- .align 4
+ .align 4
/* At this point we exit early with the first double word compare
complete and remainder of 0 to 7 bytes. See L(du14) for details on
how we handle the remaining bytes. */
@@ -683,186 +930,321 @@ L(duP1x):
bne cr5, L(duLcr5)
cmpld cr7, rN, rSHR
beq L(duZeroReturn)
- li rA, 0
+ li r0, 0
ble cr7, L(dutrim)
+#ifdef __LITTLE_ENDIAN__
+ ldbrx rWORD2, 0, rSTR2
+ addi rSTR2, rSTR2, 8
+#else
ld rWORD2, 8(rSTR2)
- srd rA, rWORD2, rSHR
+#endif
+ srd r0, rWORD2, rSHR
b L(dutrim)
/* Remainder is 16 */
- .align 4
+ .align 4
L(duP2):
- srd rE, rWORD8, rSHR
+ srd r0, rWORD8, rSHR
+#ifdef __LITTLE_ENDIAN__
+ ldbrx rWORD5, 0, rSTR1
+ addi rSTR1, rSTR1, 8
+#else
ld rWORD5, 0(rSTR1)
- or rWORD6, rE, rH
- sld rH, rWORD8, rSHL
+#endif
+ or rWORD6, r0, rWORD6_SHIFT
+ sld rWORD6_SHIFT, rWORD8, rSHL
L(duP2e):
+#ifdef __LITTLE_ENDIAN__
+ ldbrx rWORD7, 0, rSTR1
+ ldbrx rWORD8, 0, rSTR2
+ addi rSTR1, rSTR1, 8
+ addi rSTR2, rSTR2, 8
+#else
ld rWORD7, 8(rSTR1)
ld rWORD8, 8(rSTR2)
+#endif
cmpld cr6, rWORD5, rWORD6
- srd rG, rWORD8, rSHR
- sld rB, rWORD8, rSHL
- or rWORD8, rG, rH
+ srd r12, rWORD8, rSHR
+ sld rWORD8_SHIFT, rWORD8, rSHL
+ or rWORD8, r12, rWORD6_SHIFT
blt cr7, L(duP2x)
+#ifdef __LITTLE_ENDIAN__
+ ldbrx rWORD1, 0, rSTR1
+ ldbrx rWORD2, 0, rSTR2
+ addi rSTR1, rSTR1, 8
+ addi rSTR2, rSTR2, 8
+#else
ld rWORD1, 16(rSTR1)
ld rWORD2, 16(rSTR2)
+#endif
cmpld cr5, rWORD7, rWORD8
bne cr6, L(duLcr6)
- srd rA, rWORD2, rSHR
- sld rD, rWORD2, rSHL
- or rWORD2, rA, rB
+ srd r0, rWORD2, rSHR
+ sld rWORD2_SHIFT, rWORD2, rSHL
+ or rWORD2, r0, rWORD8_SHIFT
+#ifdef __LITTLE_ENDIAN__
+ ldbrx rWORD3, 0, rSTR1
+ ldbrx rWORD4, 0, rSTR2
+ addi rSTR1, rSTR1, 8
+ addi rSTR2, rSTR2, 8
+#else
ld rWORD3, 24(rSTR1)
ld rWORD4, 24(rSTR2)
- cmpld cr0, rWORD1, rWORD2
+#endif
+ cmpld cr7, rWORD1, rWORD2
bne cr5, L(duLcr5)
- srd rC, rWORD4, rSHR
- sld rF, rWORD4, rSHL
- or rWORD4, rC, rD
+ srd r12, rWORD4, rSHR
+ sld rWORD4_SHIFT, rWORD4, rSHL
+ or rWORD4, r12, rWORD2_SHIFT
+#ifndef __LITTLE_ENDIAN__
addi rSTR1, rSTR1, 8
addi rSTR2, rSTR2, 8
+#endif
cmpld cr1, rWORD3, rWORD4
b L(duLoop2)
- .align 4
+ .align 4
L(duP2x):
cmpld cr5, rWORD7, rWORD8
+#ifndef __LITTLE_ENDIAN__
addi rSTR1, rSTR1, 8
addi rSTR2, rSTR2, 8
+#endif
bne cr6, L(duLcr6)
sldi. rN, rN, 3
bne cr5, L(duLcr5)
cmpld cr7, rN, rSHR
beq L(duZeroReturn)
- li rA, 0
+ li r0, 0
ble cr7, L(dutrim)
+#ifdef __LITTLE_ENDIAN__
+ ldbrx rWORD2, 0, rSTR2
+ addi rSTR2, rSTR2, 8
+#else
ld rWORD2, 8(rSTR2)
- srd rA, rWORD2, rSHR
+#endif
+ srd r0, rWORD2, rSHR
b L(dutrim)
/* Remainder is 24 */
- .align 4
+ .align 4
L(duP3):
- srd rC, rWORD8, rSHR
+ srd r12, rWORD8, rSHR
+#ifdef __LITTLE_ENDIAN__
+ ldbrx rWORD3, 0, rSTR1
+ addi rSTR1, rSTR1, 8
+#else
ld rWORD3, 0(rSTR1)
- sld rF, rWORD8, rSHL
- or rWORD4, rC, rH
+#endif
+ sld rWORD4_SHIFT, rWORD8, rSHL
+ or rWORD4, r12, rWORD6_SHIFT
L(duP3e):
+#ifdef __LITTLE_ENDIAN__
+ ldbrx rWORD5, 0, rSTR1
+ ldbrx rWORD6, 0, rSTR2
+ addi rSTR1, rSTR1, 8
+ addi rSTR2, rSTR2, 8
+#else
ld rWORD5, 8(rSTR1)
ld rWORD6, 8(rSTR2)
+#endif
cmpld cr1, rWORD3, rWORD4
- srd rE, rWORD6, rSHR
- sld rH, rWORD6, rSHL
- or rWORD6, rE, rF
+ srd r0, rWORD6, rSHR
+ sld rWORD6_SHIFT, rWORD6, rSHL
+ or rWORD6, r0, rWORD4_SHIFT
+#ifdef __LITTLE_ENDIAN__
+ ldbrx rWORD7, 0, rSTR1
+ ldbrx rWORD8, 0, rSTR2
+ addi rSTR1, rSTR1, 8
+ addi rSTR2, rSTR2, 8
+#else
ld rWORD7, 16(rSTR1)
ld rWORD8, 16(rSTR2)
+#endif
cmpld cr6, rWORD5, rWORD6
bne cr1, L(duLcr1)
- srd rG, rWORD8, rSHR
- sld rB, rWORD8, rSHL
- or rWORD8, rG, rH
+ srd r12, rWORD8, rSHR
+ sld rWORD8_SHIFT, rWORD8, rSHL
+ or rWORD8, r12, rWORD6_SHIFT
blt cr7, L(duP3x)
+#ifdef __LITTLE_ENDIAN__
+ ldbrx rWORD1, 0, rSTR1
+ ldbrx rWORD2, 0, rSTR2
+ addi rSTR1, rSTR1, 8
+ addi rSTR2, rSTR2, 8
+#else
ld rWORD1, 24(rSTR1)
ld rWORD2, 24(rSTR2)
+#endif
cmpld cr5, rWORD7, rWORD8
bne cr6, L(duLcr6)
- srd rA, rWORD2, rSHR
- sld rD, rWORD2, rSHL
- or rWORD2, rA, rB
+ srd r0, rWORD2, rSHR
+ sld rWORD2_SHIFT, rWORD2, rSHL
+ or rWORD2, r0, rWORD8_SHIFT
+#ifndef __LITTLE_ENDIAN__
addi rSTR1, rSTR1, 16
addi rSTR2, rSTR2, 16
- cmpld cr0, rWORD1, rWORD2
+#endif
+ cmpld cr7, rWORD1, rWORD2
b L(duLoop1)
- .align 4
+ .align 4
L(duP3x):
+#ifndef __LITTLE_ENDIAN__
addi rSTR1, rSTR1, 16
addi rSTR2, rSTR2, 16
+#endif
+#if 0
+/* Huh? We've already branched on cr1! */
bne cr1, L(duLcr1)
+#endif
cmpld cr5, rWORD7, rWORD8
bne cr6, L(duLcr6)
sldi. rN, rN, 3
bne cr5, L(duLcr5)
cmpld cr7, rN, rSHR
beq L(duZeroReturn)
- li rA, 0
+ li r0, 0
ble cr7, L(dutrim)
+#ifdef __LITTLE_ENDIAN__
+ ldbrx rWORD2, 0, rSTR2
+ addi rSTR2, rSTR2, 8
+#else
ld rWORD2, 8(rSTR2)
- srd rA, rWORD2, rSHR
+#endif
+ srd r0, rWORD2, rSHR
b L(dutrim)
/* Count is a multiple of 32, remainder is 0 */
- .align 4
+ .align 4
L(duP4):
- mtctr rTMP /* Power4 wants mtctr 1st in dispatch group */
- srd rA, rWORD8, rSHR
+ mtctr r0 /* Power4 wants mtctr 1st in dispatch group */
+ srd r0, rWORD8, rSHR
+#ifdef __LITTLE_ENDIAN__
+ ldbrx rWORD1, 0, rSTR1
+ addi rSTR1, rSTR1, 8
+#else
ld rWORD1, 0(rSTR1)
- sld rD, rWORD8, rSHL
- or rWORD2, rA, rH
+#endif
+ sld rWORD2_SHIFT, rWORD8, rSHL
+ or rWORD2, r0, rWORD6_SHIFT
L(duP4e):
+#ifdef __LITTLE_ENDIAN__
+ ldbrx rWORD3, 0, rSTR1
+ ldbrx rWORD4, 0, rSTR2
+ addi rSTR1, rSTR1, 8
+ addi rSTR2, rSTR2, 8
+#else
ld rWORD3, 8(rSTR1)
ld rWORD4, 8(rSTR2)
- cmpld cr0, rWORD1, rWORD2
- srd rC, rWORD4, rSHR
- sld rF, rWORD4, rSHL
- or rWORD4, rC, rD
+#endif
+ cmpld cr7, rWORD1, rWORD2
+ srd r12, rWORD4, rSHR
+ sld rWORD4_SHIFT, rWORD4, rSHL
+ or rWORD4, r12, rWORD2_SHIFT
+#ifdef __LITTLE_ENDIAN__
+ ldbrx rWORD5, 0, rSTR1
+ ldbrx rWORD6, 0, rSTR2
+ addi rSTR1, rSTR1, 8
+ addi rSTR2, rSTR2, 8
+#else
ld rWORD5, 16(rSTR1)
ld rWORD6, 16(rSTR2)
+#endif
cmpld cr1, rWORD3, rWORD4
- bne cr0, L(duLcr0)
- srd rE, rWORD6, rSHR
- sld rH, rWORD6, rSHL
- or rWORD6, rE, rF
+ bne cr7, L(duLcr7)
+ srd r0, rWORD6, rSHR
+ sld rWORD6_SHIFT, rWORD6, rSHL
+ or rWORD6, r0, rWORD4_SHIFT
+#ifdef __LITTLE_ENDIAN__
+ ldbrx rWORD7, 0, rSTR1
+ ldbrx rWORD8, 0, rSTR2
+ addi rSTR1, rSTR1, 8
+ addi rSTR2, rSTR2, 8
+#else
ldu rWORD7, 24(rSTR1)
ldu rWORD8, 24(rSTR2)
+#endif
cmpld cr6, rWORD5, rWORD6
bne cr1, L(duLcr1)
- srd rG, rWORD8, rSHR
- sld rB, rWORD8, rSHL
- or rWORD8, rG, rH
+ srd r12, rWORD8, rSHR
+ sld rWORD8_SHIFT, rWORD8, rSHL
+ or rWORD8, r12, rWORD6_SHIFT
cmpld cr5, rWORD7, rWORD8
bdz- L(du24) /* Adjust CTR as we start with +4 */
/* This is the primary loop */
- .align 4
+ .align 4
L(duLoop):
+#ifdef __LITTLE_ENDIAN__
+ ldbrx rWORD1, 0, rSTR1
+ ldbrx rWORD2, 0, rSTR2
+ addi rSTR1, rSTR1, 8
+ addi rSTR2, rSTR2, 8
+#else
ld rWORD1, 8(rSTR1)
ld rWORD2, 8(rSTR2)
+#endif
cmpld cr1, rWORD3, rWORD4
bne cr6, L(duLcr6)
- srd rA, rWORD2, rSHR
- sld rD, rWORD2, rSHL
- or rWORD2, rA, rB
+ srd r0, rWORD2, rSHR
+ sld rWORD2_SHIFT, rWORD2, rSHL
+ or rWORD2, r0, rWORD8_SHIFT
L(duLoop1):
+#ifdef __LITTLE_ENDIAN__
+ ldbrx rWORD3, 0, rSTR1
+ ldbrx rWORD4, 0, rSTR2
+ addi rSTR1, rSTR1, 8
+ addi rSTR2, rSTR2, 8
+#else
ld rWORD3, 16(rSTR1)
ld rWORD4, 16(rSTR2)
+#endif
cmpld cr6, rWORD5, rWORD6
bne cr5, L(duLcr5)
- srd rC, rWORD4, rSHR
- sld rF, rWORD4, rSHL
- or rWORD4, rC, rD
+ srd r12, rWORD4, rSHR
+ sld rWORD4_SHIFT, rWORD4, rSHL
+ or rWORD4, r12, rWORD2_SHIFT
L(duLoop2):
+#ifdef __LITTLE_ENDIAN__
+ ldbrx rWORD5, 0, rSTR1
+ ldbrx rWORD6, 0, rSTR2
+ addi rSTR1, rSTR1, 8
+ addi rSTR2, rSTR2, 8
+#else
ld rWORD5, 24(rSTR1)
ld rWORD6, 24(rSTR2)
+#endif
cmpld cr5, rWORD7, rWORD8
- bne cr0, L(duLcr0)
- srd rE, rWORD6, rSHR
- sld rH, rWORD6, rSHL
- or rWORD6, rE, rF
+ bne cr7, L(duLcr7)
+ srd r0, rWORD6, rSHR
+ sld rWORD6_SHIFT, rWORD6, rSHL
+ or rWORD6, r0, rWORD4_SHIFT
L(duLoop3):
+#ifdef __LITTLE_ENDIAN__
+ ldbrx rWORD7, 0, rSTR1
+ ldbrx rWORD8, 0, rSTR2
+ addi rSTR1, rSTR1, 8
+ addi rSTR2, rSTR2, 8
+#else
ldu rWORD7, 32(rSTR1)
ldu rWORD8, 32(rSTR2)
- cmpld cr0, rWORD1, rWORD2
+#endif
+ cmpld cr7, rWORD1, rWORD2
bne- cr1, L(duLcr1)
- srd rG, rWORD8, rSHR
- sld rB, rWORD8, rSHL
- or rWORD8, rG, rH
+ srd r12, rWORD8, rSHR
+ sld rWORD8_SHIFT, rWORD8, rSHL
+ or rWORD8, r12, rWORD6_SHIFT
bdnz+ L(duLoop)
L(duL4):
+#if 0
+/* Huh? We've already branched on cr1! */
bne cr1, L(duLcr1)
+#endif
cmpld cr1, rWORD3, rWORD4
bne cr6, L(duLcr6)
cmpld cr6, rWORD5, rWORD6
bne cr5, L(duLcr5)
cmpld cr5, rWORD7, rWORD8
L(du44):
- bne cr0, L(duLcr0)
+ bne cr7, L(duLcr7)
L(du34):
bne cr1, L(duLcr1)
L(du24):
@@ -872,103 +1254,110 @@ L(du14):
bne cr5, L(duLcr5)
/* At this point we have a remainder of 1 to 7 bytes to compare. We use
shift right double to eliminate bits beyond the compare length.
- This allows the use of double word subtract to compute the final
- result.
However it may not be safe to load rWORD2 which may be beyond the
string length. So we compare the bit length of the remainder to
the right shift count (rSHR). If the bit count is less than or equal
we do not need to load rWORD2 (all significant bits are already in
- rB). */
+ rWORD8_SHIFT). */
cmpld cr7, rN, rSHR
beq L(duZeroReturn)
- li rA, 0
+ li r0, 0
ble cr7, L(dutrim)
+#ifdef __LITTLE_ENDIAN__
+ ldbrx rWORD2, 0, rSTR2
+ addi rSTR2, rSTR2, 8
+#else
ld rWORD2, 8(rSTR2)
- srd rA, rWORD2, rSHR
- .align 4
+#endif
+ srd r0, rWORD2, rSHR
+ .align 4
L(dutrim):
+#ifdef __LITTLE_ENDIAN__
+ ldbrx rWORD1, 0, rSTR1
+#else
ld rWORD1, 8(rSTR1)
- ld rWORD8,-8(r1)
+#endif
+ ld rWORD8, -8(r1)
subfic rN, rN, 64 /* Shift count is 64 - (rN * 8). */
- or rWORD2, rA, rB
- ld rWORD7,-16(r1)
- ld r29,-24(r1)
+ or rWORD2, r0, rWORD8_SHIFT
+ ld rWORD7, -16(r1)
+ ld rSHL, -24(r1)
srd rWORD1, rWORD1, rN
srd rWORD2, rWORD2, rN
- ld r28,-32(r1)
- ld r27,-40(r1)
+ ld rSHR, -32(r1)
+ ld rWORD8_SHIFT, -40(r1)
li rRTN, 0
- cmpld cr0, rWORD1, rWORD2
- ld r26,-48(r1)
- ld r25,-56(r1)
- beq cr0, L(dureturn24)
+ cmpld cr7, rWORD1, rWORD2
+ ld rWORD2_SHIFT, -48(r1)
+ ld rWORD4_SHIFT, -56(r1)
+ beq cr7, L(dureturn24)
li rRTN, 1
- ld r24,-64(r1)
- bgtlr cr0
+ ld rWORD6_SHIFT, -64(r1)
+ bgtlr cr7
li rRTN, -1
blr
- .align 4
-L(duLcr0):
- ld rWORD8,-8(r1)
- ld rWORD7,-16(r1)
+ .align 4
+L(duLcr7):
+ ld rWORD8, -8(r1)
+ ld rWORD7, -16(r1)
li rRTN, 1
- bgt cr0, L(dureturn29)
- ld r29,-24(r1)
- ld r28,-32(r1)
+ bgt cr7, L(dureturn29)
+ ld rSHL, -24(r1)
+ ld rSHR, -32(r1)
li rRTN, -1
b L(dureturn27)
- .align 4
+ .align 4
L(duLcr1):
- ld rWORD8,-8(r1)
- ld rWORD7,-16(r1)
+ ld rWORD8, -8(r1)
+ ld rWORD7, -16(r1)
li rRTN, 1
bgt cr1, L(dureturn29)
- ld r29,-24(r1)
- ld r28,-32(r1)
+ ld rSHL, -24(r1)
+ ld rSHR, -32(r1)
li rRTN, -1
b L(dureturn27)
- .align 4
+ .align 4
L(duLcr6):
- ld rWORD8,-8(r1)
- ld rWORD7,-16(r1)
+ ld rWORD8, -8(r1)
+ ld rWORD7, -16(r1)
li rRTN, 1
bgt cr6, L(dureturn29)
- ld r29,-24(r1)
- ld r28,-32(r1)
+ ld rSHL, -24(r1)
+ ld rSHR, -32(r1)
li rRTN, -1
b L(dureturn27)
- .align 4
+ .align 4
L(duLcr5):
- ld rWORD8,-8(r1)
- ld rWORD7,-16(r1)
+ ld rWORD8, -8(r1)
+ ld rWORD7, -16(r1)
li rRTN, 1
bgt cr5, L(dureturn29)
- ld r29,-24(r1)
- ld r28,-32(r1)
+ ld rSHL, -24(r1)
+ ld rSHR, -32(r1)
li rRTN, -1
b L(dureturn27)
.align 3
L(duZeroReturn):
- li rRTN,0
+ li rRTN, 0
.align 4
L(dureturn):
- ld rWORD8,-8(r1)
- ld rWORD7,-16(r1)
+ ld rWORD8, -8(r1)
+ ld rWORD7, -16(r1)
L(dureturn29):
- ld r29,-24(r1)
- ld r28,-32(r1)
+ ld rSHL, -24(r1)
+ ld rSHR, -32(r1)
L(dureturn27):
- ld r27,-40(r1)
+ ld rWORD8_SHIFT, -40(r1)
L(dureturn26):
- ld r26,-48(r1)
+ ld rWORD2_SHIFT, -48(r1)
L(dureturn25):
- ld r25,-56(r1)
+ ld rWORD4_SHIFT, -56(r1)
L(dureturn24):
- ld r24,-64(r1)
+ ld rWORD6_SHIFT, -64(r1)
blr
L(duzeroLength):
- li rRTN,0
+ li rRTN, 0
blr
END (memcmp)
diff --git a/sysdeps/powerpc/powerpc64/power7/memcmp.S b/sysdeps/powerpc/powerpc64/power7/memcmp.S
index f190c64611..6851cdc75b 100644
--- a/sysdeps/powerpc/powerpc64/power7/memcmp.S
+++ b/sysdeps/powerpc/powerpc64/power7/memcmp.S
@@ -23,10 +23,9 @@
size_t size [r5]) */
.machine power7
-EALIGN (memcmp,4,0)
+EALIGN (memcmp, 4, 0)
CALL_MCOUNT 3
-#define rTMP r0
#define rRTN r3
#define rSTR1 r3 /* first string arg */
#define rSTR2 r4 /* second string arg */
@@ -37,354 +36,557 @@ EALIGN (memcmp,4,0)
#define rWORD4 r9 /* next word in s2 */
#define rWORD5 r10 /* next word in s1 */
#define rWORD6 r11 /* next word in s2 */
-#define rBITDIF r12 /* bits that differ in s1 & s2 words */
#define rWORD7 r30 /* next word in s1 */
#define rWORD8 r31 /* next word in s2 */
- xor rTMP,rSTR2,rSTR1
- cmpldi cr6,rN,0
- cmpldi cr1,rN,12
- clrldi. rTMP,rTMP,61
- clrldi rBITDIF,rSTR1,61
- cmpldi cr5,rBITDIF,0
- beq- cr6,L(zeroLength)
- dcbt 0,rSTR1
- dcbt 0,rSTR2
+ xor r0, rSTR2, rSTR1
+ cmpldi cr6, rN, 0
+ cmpldi cr1, rN, 12
+ clrldi. r0, r0, 61
+ clrldi r12, rSTR1, 61
+ cmpldi cr5, r12, 0
+ beq- cr6, L(zeroLength)
+ dcbt 0, rSTR1
+ dcbt 0, rSTR2
/* If less than 8 bytes or not aligned, use the unaligned
byte loop. */
- blt cr1,L(bytealigned)
- std rWORD8,-8(r1)
- cfi_offset(rWORD8,-8)
- std rWORD7,-16(r1)
- cfi_offset(rWORD7,-16)
+ blt cr1, L(bytealigned)
+ std rWORD8, -8(r1)
+ cfi_offset(rWORD8, -8)
+ std rWORD7, -16(r1)
+ cfi_offset(rWORD7, -16)
bne L(unaligned)
/* At this point we know both strings have the same alignment and the
- compare length is at least 8 bytes. rBITDIF contains the low order
+ compare length is at least 8 bytes. r12 contains the low order
3 bits of rSTR1 and cr5 contains the result of the logical compare
- of rBITDIF to 0. If rBITDIF == 0 then we are already double word
- aligned and can perform the DWaligned loop.
+ of r12 to 0. If r12 == 0 then we are already double word
+ aligned and can perform the DW aligned loop.
Otherwise we know the two strings have the same alignment (but not
- yet DW). So we can force the string addresses to the next lower DW
- boundary and special case this first DW word using shift left to
+ yet DW). So we force the string addresses to the next lower DW
+ boundary and special case this first DW using shift left to
eliminate bits preceding the first byte. Since we want to join the
- normal (DWaligned) compare loop, starting at the second double word,
+ normal (DW aligned) compare loop, starting at the second double word,
we need to adjust the length (rN) and special case the loop
- versioning for the first DW. This insures that the loop count is
- correct and the first DW (shifted) is in the expected resister pair. */
+ versioning for the first DW. This ensures that the loop count is
+ correct and the first DW (shifted) is in the expected register pair. */
.align 4
L(samealignment):
- clrrdi rSTR1,rSTR1,3
- clrrdi rSTR2,rSTR2,3
- beq cr5,L(DWaligned)
- add rN,rN,rBITDIF
- sldi r11,rBITDIF,3
- srdi rTMP,rN,5 /* Divide by 32 */
- andi. rBITDIF,rN,24 /* Get the DW remainder */
- ld rWORD1,0(rSTR1)
- ld rWORD2,0(rSTR2)
- cmpldi cr1,rBITDIF,16
- cmpldi cr7,rN,32
- clrldi rN,rN,61
+ clrrdi rSTR1, rSTR1, 3
+ clrrdi rSTR2, rSTR2, 3
+ beq cr5, L(DWaligned)
+ add rN, rN, r12
+ sldi rWORD6, r12, 3
+ srdi r0, rN, 5 /* Divide by 32 */
+ andi. r12, rN, 24 /* Get the DW remainder */
+#ifdef __LITTLE_ENDIAN__
+ ldbrx rWORD1, 0, rSTR1
+ ldbrx rWORD2, 0, rSTR2
+ addi rSTR1, rSTR1, 8
+ addi rSTR2, rSTR2, 8
+#else
+ ld rWORD1, 0(rSTR1)
+ ld rWORD2, 0(rSTR2)
+#endif
+ cmpldi cr1, r12, 16
+ cmpldi cr7, rN, 32
+ clrldi rN, rN, 61
beq L(dPs4)
- mtctr rTMP
- bgt cr1,L(dPs3)
- beq cr1,L(dPs2)
+ mtctr r0
+ bgt cr1, L(dPs3)
+ beq cr1, L(dPs2)
/* Remainder is 8 */
.align 3
L(dsP1):
- sld rWORD5,rWORD1,r11
- sld rWORD6,rWORD2,r11
- cmpld cr5,rWORD5,rWORD6
- blt cr7,L(dP1x)
+ sld rWORD5, rWORD1, rWORD6
+ sld rWORD6, rWORD2, rWORD6
+ cmpld cr5, rWORD5, rWORD6
+ blt cr7, L(dP1x)
/* Do something useful in this cycle since we have to branch anyway. */
- ld rWORD1,8(rSTR1)
- ld rWORD2,8(rSTR2)
- cmpld cr0,rWORD1,rWORD2
+#ifdef __LITTLE_ENDIAN__
+ ldbrx rWORD1, 0, rSTR1
+ ldbrx rWORD2, 0, rSTR2
+ addi rSTR1, rSTR1, 8
+ addi rSTR2, rSTR2, 8
+#else
+ ld rWORD1, 8(rSTR1)
+ ld rWORD2, 8(rSTR2)
+#endif
+ cmpld cr7, rWORD1, rWORD2
b L(dP1e)
/* Remainder is 16 */
.align 4
L(dPs2):
- sld rWORD5,rWORD1,r11
- sld rWORD6,rWORD2,r11
- cmpld cr6,rWORD5,rWORD6
- blt cr7,L(dP2x)
+ sld rWORD5, rWORD1, rWORD6
+ sld rWORD6, rWORD2, rWORD6
+ cmpld cr6, rWORD5, rWORD6
+ blt cr7, L(dP2x)
/* Do something useful in this cycle since we have to branch anyway. */
- ld rWORD7,8(rSTR1)
- ld rWORD8,8(rSTR2)
- cmpld cr5,rWORD7,rWORD8
+#ifdef __LITTLE_ENDIAN__
+ ldbrx rWORD7, 0, rSTR1
+ ldbrx rWORD8, 0, rSTR2
+ addi rSTR1, rSTR1, 8
+ addi rSTR2, rSTR2, 8
+#else
+ ld rWORD7, 8(rSTR1)
+ ld rWORD8, 8(rSTR2)
+#endif
+ cmpld cr5, rWORD7, rWORD8
b L(dP2e)
/* Remainder is 24 */
.align 4
L(dPs3):
- sld rWORD3,rWORD1,r11
- sld rWORD4,rWORD2,r11
- cmpld cr1,rWORD3,rWORD4
+ sld rWORD3, rWORD1, rWORD6
+ sld rWORD4, rWORD2, rWORD6
+ cmpld cr1, rWORD3, rWORD4
b L(dP3e)
/* Count is a multiple of 32, remainder is 0 */
.align 4
L(dPs4):
- mtctr rTMP
- sld rWORD1,rWORD1,r11
- sld rWORD2,rWORD2,r11
- cmpld cr0,rWORD1,rWORD2
+ mtctr r0
+ sld rWORD1, rWORD1, rWORD6
+ sld rWORD2, rWORD2, rWORD6
+ cmpld cr7, rWORD1, rWORD2
b L(dP4e)
/* At this point we know both strings are double word aligned and the
compare length is at least 8 bytes. */
.align 4
L(DWaligned):
- andi. rBITDIF,rN,24 /* Get the DW remainder */
- srdi rTMP,rN,5 /* Divide by 32 */
- cmpldi cr1,rBITDIF,16
- cmpldi cr7,rN,32
- clrldi rN,rN,61
+ andi. r12, rN, 24 /* Get the DW remainder */
+ srdi r0, rN, 5 /* Divide by 32 */
+ cmpldi cr1, r12, 16
+ cmpldi cr7, rN, 32
+ clrldi rN, rN, 61
beq L(dP4)
- bgt cr1,L(dP3)
- beq cr1,L(dP2)
+ bgt cr1, L(dP3)
+ beq cr1, L(dP2)
/* Remainder is 8 */
.align 4
L(dP1):
- mtctr rTMP
+ mtctr r0
/* Normally we'd use rWORD7/rWORD8 here, but since we might exit early
(8-15 byte compare), we want to use only volatile registers. This
means we can avoid restoring non-volatile registers since we did not
change any on the early exit path. The key here is the non-early
exit path only cares about the condition code (cr5), not about which
register pair was used. */
- ld rWORD5,0(rSTR1)
- ld rWORD6,0(rSTR2)
- cmpld cr5,rWORD5,rWORD6
- blt cr7,L(dP1x)
- ld rWORD1,8(rSTR1)
- ld rWORD2,8(rSTR2)
- cmpld cr0,rWORD1,rWORD2
+#ifdef __LITTLE_ENDIAN__
+ ldbrx rWORD5, 0, rSTR1
+ ldbrx rWORD6, 0, rSTR2
+ addi rSTR1, rSTR1, 8
+ addi rSTR2, rSTR2, 8
+#else
+ ld rWORD5, 0(rSTR1)
+ ld rWORD6, 0(rSTR2)
+#endif
+ cmpld cr5, rWORD5, rWORD6
+ blt cr7, L(dP1x)
+#ifdef __LITTLE_ENDIAN__
+ ldbrx rWORD1, 0, rSTR1
+ ldbrx rWORD2, 0, rSTR2
+ addi rSTR1, rSTR1, 8
+ addi rSTR2, rSTR2, 8
+#else
+ ld rWORD1, 8(rSTR1)
+ ld rWORD2, 8(rSTR2)
+#endif
+ cmpld cr7, rWORD1, rWORD2
L(dP1e):
- ld rWORD3,16(rSTR1)
- ld rWORD4,16(rSTR2)
- cmpld cr1,rWORD3,rWORD4
- ld rWORD5,24(rSTR1)
- ld rWORD6,24(rSTR2)
- cmpld cr6,rWORD5,rWORD6
- bne cr5,L(dLcr5)
- bne cr0,L(dLcr0)
-
- ldu rWORD7,32(rSTR1)
- ldu rWORD8,32(rSTR2)
- bne cr1,L(dLcr1)
- cmpld cr5,rWORD7,rWORD8
+#ifdef __LITTLE_ENDIAN__
+ ldbrx rWORD3, 0, rSTR1
+ ldbrx rWORD4, 0, rSTR2
+ addi rSTR1, rSTR1, 8
+ addi rSTR2, rSTR2, 8
+#else
+ ld rWORD3, 16(rSTR1)
+ ld rWORD4, 16(rSTR2)
+#endif
+ cmpld cr1, rWORD3, rWORD4
+#ifdef __LITTLE_ENDIAN__
+ ldbrx rWORD5, 0, rSTR1
+ ldbrx rWORD6, 0, rSTR2
+ addi rSTR1, rSTR1, 8
+ addi rSTR2, rSTR2, 8
+#else
+ ld rWORD5, 24(rSTR1)
+ ld rWORD6, 24(rSTR2)
+#endif
+ cmpld cr6, rWORD5, rWORD6
+ bne cr5, L(dLcr5x)
+ bne cr7, L(dLcr7x)
+
+#ifdef __LITTLE_ENDIAN__
+ ldbrx rWORD7, 0, rSTR1
+ ldbrx rWORD8, 0, rSTR2
+ addi rSTR1, rSTR1, 8
+ addi rSTR2, rSTR2, 8
+#else
+ ldu rWORD7, 32(rSTR1)
+ ldu rWORD8, 32(rSTR2)
+#endif
+ bne cr1, L(dLcr1)
+ cmpld cr5, rWORD7, rWORD8
bdnz L(dLoop)
- bne cr6,L(dLcr6)
- ld rWORD8,-8(r1)
- ld rWORD7,-16(r1)
+ bne cr6, L(dLcr6)
+ ld rWORD8, -8(r1)
+ ld rWORD7, -16(r1)
.align 3
L(dP1x):
- sldi. r12,rN,3
- bne cr5,L(dLcr5)
- subfic rN,r12,64 /* Shift count is 64 - (rN * 8). */
+ sldi. r12, rN, 3
+ bne cr5, L(dLcr5x)
+ subfic rN, r12, 64 /* Shift count is 64 - (rN * 8). */
bne L(d00)
- li rRTN,0
+ li rRTN, 0
blr
/* Remainder is 16 */
.align 4
L(dP2):
- mtctr rTMP
- ld rWORD5,0(rSTR1)
- ld rWORD6,0(rSTR2)
- cmpld cr6,rWORD5,rWORD6
- blt cr7,L(dP2x)
- ld rWORD7,8(rSTR1)
- ld rWORD8,8(rSTR2)
- cmpld cr5,rWORD7,rWORD8
+ mtctr r0
+#ifdef __LITTLE_ENDIAN__
+ ldbrx rWORD5, 0, rSTR1
+ ldbrx rWORD6, 0, rSTR2
+ addi rSTR1, rSTR1, 8
+ addi rSTR2, rSTR2, 8
+#else
+ ld rWORD5, 0(rSTR1)
+ ld rWORD6, 0(rSTR2)
+#endif
+ cmpld cr6, rWORD5, rWORD6
+ blt cr7, L(dP2x)
+#ifdef __LITTLE_ENDIAN__
+ ldbrx rWORD7, 0, rSTR1
+ ldbrx rWORD8, 0, rSTR2
+ addi rSTR1, rSTR1, 8
+ addi rSTR2, rSTR2, 8
+#else
+ ld rWORD7, 8(rSTR1)
+ ld rWORD8, 8(rSTR2)
+#endif
+ cmpld cr5, rWORD7, rWORD8
L(dP2e):
- ld rWORD1,16(rSTR1)
- ld rWORD2,16(rSTR2)
- cmpld cr0,rWORD1,rWORD2
- ld rWORD3,24(rSTR1)
- ld rWORD4,24(rSTR2)
- cmpld cr1,rWORD3,rWORD4
- addi rSTR1,rSTR1,8
- addi rSTR2,rSTR2,8
- bne cr6,L(dLcr6)
- bne cr5,L(dLcr5)
+#ifdef __LITTLE_ENDIAN__
+ ldbrx rWORD1, 0, rSTR1
+ ldbrx rWORD2, 0, rSTR2
+ addi rSTR1, rSTR1, 8
+ addi rSTR2, rSTR2, 8
+#else
+ ld rWORD1, 16(rSTR1)
+ ld rWORD2, 16(rSTR2)
+#endif
+ cmpld cr7, rWORD1, rWORD2
+#ifdef __LITTLE_ENDIAN__
+ ldbrx rWORD3, 0, rSTR1
+ ldbrx rWORD4, 0, rSTR2
+ addi rSTR1, rSTR1, 8
+ addi rSTR2, rSTR2, 8
+#else
+ ld rWORD3, 24(rSTR1)
+ ld rWORD4, 24(rSTR2)
+#endif
+ cmpld cr1, rWORD3, rWORD4
+#ifndef __LITTLE_ENDIAN__
+ addi rSTR1, rSTR1, 8
+ addi rSTR2, rSTR2, 8
+#endif
+ bne cr6, L(dLcr6)
+ bne cr5, L(dLcr5)
b L(dLoop2)
/* Again we are on a early exit path (16-23 byte compare), we want to
only use volatile registers and avoid restoring non-volatile
registers. */
.align 4
L(dP2x):
- ld rWORD3,8(rSTR1)
- ld rWORD4,8(rSTR2)
- cmpld cr5,rWORD3,rWORD4
- sldi. r12,rN,3
- bne cr6,L(dLcr6)
- addi rSTR1,rSTR1,8
- addi rSTR2,rSTR2,8
- bne cr5,L(dLcr5)
- subfic rN,r12,64 /* Shift count is 64 - (rN * 8). */
+#ifdef __LITTLE_ENDIAN__
+ ldbrx rWORD3, 0, rSTR1
+ ldbrx rWORD4, 0, rSTR2
+ addi rSTR1, rSTR1, 8
+ addi rSTR2, rSTR2, 8
+#else
+ ld rWORD3, 8(rSTR1)
+ ld rWORD4, 8(rSTR2)
+#endif
+ cmpld cr1, rWORD3, rWORD4
+ sldi. r12, rN, 3
+ bne cr6, L(dLcr6x)
+#ifndef __LITTLE_ENDIAN__
+ addi rSTR1, rSTR1, 8
+ addi rSTR2, rSTR2, 8
+#endif
+ bne cr1, L(dLcr1x)
+ subfic rN, r12, 64 /* Shift count is 64 - (rN * 8). */
bne L(d00)
- li rRTN,0
+ li rRTN, 0
blr
/* Remainder is 24 */
.align 4
L(dP3):
- mtctr rTMP
- ld rWORD3,0(rSTR1)
- ld rWORD4,0(rSTR2)
- cmpld cr1,rWORD3,rWORD4
+ mtctr r0
+#ifdef __LITTLE_ENDIAN__
+ ldbrx rWORD3, 0, rSTR1
+ ldbrx rWORD4, 0, rSTR2
+ addi rSTR1, rSTR1, 8
+ addi rSTR2, rSTR2, 8
+#else
+ ld rWORD3, 0(rSTR1)
+ ld rWORD4, 0(rSTR2)
+#endif
+ cmpld cr1, rWORD3, rWORD4
L(dP3e):
- ld rWORD5,8(rSTR1)
- ld rWORD6,8(rSTR2)
- cmpld cr6,rWORD5,rWORD6
- blt cr7,L(dP3x)
- ld rWORD7,16(rSTR1)
- ld rWORD8,16(rSTR2)
- cmpld cr5,rWORD7,rWORD8
- ld rWORD1,24(rSTR1)
- ld rWORD2,24(rSTR2)
- cmpld cr0,rWORD1,rWORD2
- addi rSTR1,rSTR1,16
- addi rSTR2,rSTR2,16
- bne cr1,L(dLcr1)
- bne cr6,L(dLcr6)
+#ifdef __LITTLE_ENDIAN__
+ ldbrx rWORD5, 0, rSTR1
+ ldbrx rWORD6, 0, rSTR2
+ addi rSTR1, rSTR1, 8
+ addi rSTR2, rSTR2, 8
+#else
+ ld rWORD5, 8(rSTR1)
+ ld rWORD6, 8(rSTR2)
+#endif
+ cmpld cr6, rWORD5, rWORD6
+ blt cr7, L(dP3x)
+#ifdef __LITTLE_ENDIAN__
+ ldbrx rWORD7, 0, rSTR1
+ ldbrx rWORD8, 0, rSTR2
+ addi rSTR1, rSTR1, 8
+ addi rSTR2, rSTR2, 8
+#else
+ ld rWORD7, 16(rSTR1)
+ ld rWORD8, 16(rSTR2)
+#endif
+ cmpld cr5, rWORD7, rWORD8
+#ifdef __LITTLE_ENDIAN__
+ ldbrx rWORD1, 0, rSTR1
+ ldbrx rWORD2, 0, rSTR2
+ addi rSTR1, rSTR1, 8
+ addi rSTR2, rSTR2, 8
+#else
+ ld rWORD1, 24(rSTR1)
+ ld rWORD2, 24(rSTR2)
+#endif
+ cmpld cr7, rWORD1, rWORD2
+#ifndef __LITTLE_ENDIAN__
+ addi rSTR1, rSTR1, 16
+ addi rSTR2, rSTR2, 16
+#endif
+ bne cr1, L(dLcr1)
+ bne cr6, L(dLcr6)
b L(dLoop1)
/* Again we are on a early exit path (24-31 byte compare), we want to
only use volatile registers and avoid restoring non-volatile
registers. */
.align 4
L(dP3x):
- ld rWORD1,16(rSTR1)
- ld rWORD2,16(rSTR2)
- cmpld cr5,rWORD1,rWORD2
- sldi. r12,rN,3
- bne cr1,L(dLcr1)
- addi rSTR1,rSTR1,16
- addi rSTR2,rSTR2,16
- bne cr6,L(dLcr6)
- subfic rN,r12,64 /* Shift count is 64 - (rN * 8). */
- bne cr5,L(dLcr5)
+#ifdef __LITTLE_ENDIAN__
+ ldbrx rWORD1, 0, rSTR1
+ ldbrx rWORD2, 0, rSTR2
+ addi rSTR1, rSTR1, 8
+ addi rSTR2, rSTR2, 8
+#else
+ ld rWORD1, 16(rSTR1)
+ ld rWORD2, 16(rSTR2)
+#endif
+ cmpld cr7, rWORD1, rWORD2
+ sldi. r12, rN, 3
+ bne cr1, L(dLcr1x)
+#ifndef __LITTLE_ENDIAN__
+ addi rSTR1, rSTR1, 16
+ addi rSTR2, rSTR2, 16
+#endif
+ bne cr6, L(dLcr6x)
+ subfic rN, r12, 64 /* Shift count is 64 - (rN * 8). */
+ bne cr7, L(dLcr7x)
bne L(d00)
- li rRTN,0
+ li rRTN, 0
blr
/* Count is a multiple of 32, remainder is 0 */
.align 4
L(dP4):
- mtctr rTMP
- ld rWORD1,0(rSTR1)
- ld rWORD2,0(rSTR2)
- cmpld cr0,rWORD1,rWORD2
+ mtctr r0
+#ifdef __LITTLE_ENDIAN__
+ ldbrx rWORD1, 0, rSTR1
+ ldbrx rWORD2, 0, rSTR2
+ addi rSTR1, rSTR1, 8
+ addi rSTR2, rSTR2, 8
+#else
+ ld rWORD1, 0(rSTR1)
+ ld rWORD2, 0(rSTR2)
+#endif
+ cmpld cr7, rWORD1, rWORD2
L(dP4e):
- ld rWORD3,8(rSTR1)
- ld rWORD4,8(rSTR2)
- cmpld cr1,rWORD3,rWORD4
- ld rWORD5,16(rSTR1)
- ld rWORD6,16(rSTR2)
- cmpld cr6,rWORD5,rWORD6
- ldu rWORD7,24(rSTR1)
- ldu rWORD8,24(rSTR2)
- cmpld cr5,rWORD7,rWORD8
- bne cr0,L(dLcr0)
- bne cr1,L(dLcr1)
+#ifdef __LITTLE_ENDIAN__
+ ldbrx rWORD3, 0, rSTR1
+ ldbrx rWORD4, 0, rSTR2
+ addi rSTR1, rSTR1, 8
+ addi rSTR2, rSTR2, 8
+#else
+ ld rWORD3, 8(rSTR1)
+ ld rWORD4, 8(rSTR2)
+#endif
+ cmpld cr1, rWORD3, rWORD4
+#ifdef __LITTLE_ENDIAN__
+ ldbrx rWORD5, 0, rSTR1
+ ldbrx rWORD6, 0, rSTR2
+ addi rSTR1, rSTR1, 8
+ addi rSTR2, rSTR2, 8
+#else
+ ld rWORD5, 16(rSTR1)
+ ld rWORD6, 16(rSTR2)
+#endif
+ cmpld cr6, rWORD5, rWORD6
+#ifdef __LITTLE_ENDIAN__
+ ldbrx rWORD7, 0, rSTR1
+ ldbrx rWORD8, 0, rSTR2
+ addi rSTR1, rSTR1, 8
+ addi rSTR2, rSTR2, 8
+#else
+ ldu rWORD7, 24(rSTR1)
+ ldu rWORD8, 24(rSTR2)
+#endif
+ cmpld cr5, rWORD7, rWORD8
+ bne cr7, L(dLcr7)
+ bne cr1, L(dLcr1)
bdz- L(d24) /* Adjust CTR as we start with +4 */
/* This is the primary loop */
.align 4
L(dLoop):
- ld rWORD1,8(rSTR1)
- ld rWORD2,8(rSTR2)
- cmpld cr1,rWORD3,rWORD4
- bne cr6,L(dLcr6)
+#ifdef __LITTLE_ENDIAN__
+ ldbrx rWORD1, 0, rSTR1
+ ldbrx rWORD2, 0, rSTR2
+ addi rSTR1, rSTR1, 8
+ addi rSTR2, rSTR2, 8
+#else
+ ld rWORD1, 8(rSTR1)
+ ld rWORD2, 8(rSTR2)
+#endif
+ cmpld cr1, rWORD3, rWORD4
+ bne cr6, L(dLcr6)
L(dLoop1):
- ld rWORD3,16(rSTR1)
- ld rWORD4,16(rSTR2)
- cmpld cr6,rWORD5,rWORD6
- bne cr5,L(dLcr5)
+#ifdef __LITTLE_ENDIAN__
+ ldbrx rWORD3, 0, rSTR1
+ ldbrx rWORD4, 0, rSTR2
+ addi rSTR1, rSTR1, 8
+ addi rSTR2, rSTR2, 8
+#else
+ ld rWORD3, 16(rSTR1)
+ ld rWORD4, 16(rSTR2)
+#endif
+ cmpld cr6, rWORD5, rWORD6
+ bne cr5, L(dLcr5)
L(dLoop2):
- ld rWORD5,24(rSTR1)
- ld rWORD6,24(rSTR2)
- cmpld cr5,rWORD7,rWORD8
- bne cr0,L(dLcr0)
+#ifdef __LITTLE_ENDIAN__
+ ldbrx rWORD5, 0, rSTR1
+ ldbrx rWORD6, 0, rSTR2
+ addi rSTR1, rSTR1, 8
+ addi rSTR2, rSTR2, 8
+#else
+ ld rWORD5, 24(rSTR1)
+ ld rWORD6, 24(rSTR2)
+#endif
+ cmpld cr5, rWORD7, rWORD8
+ bne cr7, L(dLcr7)
L(dLoop3):
- ldu rWORD7,32(rSTR1)
- ldu rWORD8,32(rSTR2)
- bne cr1,L(dLcr1)
- cmpld cr0,rWORD1,rWORD2
+#ifdef __LITTLE_ENDIAN__
+ ldbrx rWORD7, 0, rSTR1
+ ldbrx rWORD8, 0, rSTR2
+ addi rSTR1, rSTR1, 8
+ addi rSTR2, rSTR2, 8
+#else
+ ldu rWORD7, 32(rSTR1)
+ ldu rWORD8, 32(rSTR2)
+#endif
+ bne cr1, L(dLcr1)
+ cmpld cr7, rWORD1, rWORD2
bdnz L(dLoop)
L(dL4):
- cmpld cr1,rWORD3,rWORD4
- bne cr6,L(dLcr6)
- cmpld cr6,rWORD5,rWORD6
- bne cr5,L(dLcr5)
- cmpld cr5,rWORD7,rWORD8
+ cmpld cr1, rWORD3, rWORD4
+ bne cr6, L(dLcr6)
+ cmpld cr6, rWORD5, rWORD6
+ bne cr5, L(dLcr5)
+ cmpld cr5, rWORD7, rWORD8
L(d44):
- bne cr0,L(dLcr0)
+ bne cr7, L(dLcr7)
L(d34):
- bne cr1,L(dLcr1)
+ bne cr1, L(dLcr1)
L(d24):
- bne cr6,L(dLcr6)
+ bne cr6, L(dLcr6)
L(d14):
- sldi. r12,rN,3
- bne cr5,L(dLcr5)
+ sldi. r12, rN, 3
+ bne cr5, L(dLcr5)
L(d04):
- ld rWORD8,-8(r1)
- ld rWORD7,-16(r1)
- subfic rN,r12,64 /* Shift count is 64 - (rN * 8). */
+ ld rWORD8, -8(r1)
+ ld rWORD7, -16(r1)
+ subfic rN, r12, 64 /* Shift count is 64 - (rN * 8). */
beq L(zeroLength)
/* At this point we have a remainder of 1 to 7 bytes to compare. Since
we are aligned it is safe to load the whole double word, and use
shift right double to eliminate bits beyond the compare length. */
L(d00):
- ld rWORD1,8(rSTR1)
- ld rWORD2,8(rSTR2)
- srd rWORD1,rWORD1,rN
- srd rWORD2,rWORD2,rN
- cmpld cr5,rWORD1,rWORD2
- bne cr5,L(dLcr5x)
- li rRTN,0
+#ifdef __LITTLE_ENDIAN__
+ ldbrx rWORD1, 0, rSTR1
+ ldbrx rWORD2, 0, rSTR2
+ addi rSTR1, rSTR1, 8
+ addi rSTR2, rSTR2, 8
+#else
+ ld rWORD1, 8(rSTR1)
+ ld rWORD2, 8(rSTR2)
+#endif
+ srd rWORD1, rWORD1, rN
+ srd rWORD2, rWORD2, rN
+ cmpld cr7, rWORD1, rWORD2
+ bne cr7, L(dLcr7x)
+ li rRTN, 0
blr
+
.align 4
-L(dLcr0):
- ld rWORD8,-8(r1)
- ld rWORD7,-16(r1)
- li rRTN,1
- bgtlr cr0
- li rRTN,-1
+L(dLcr7):
+ ld rWORD8, -8(r1)
+ ld rWORD7, -16(r1)
+L(dLcr7x):
+ li rRTN, 1
+ bgtlr cr7
+ li rRTN, -1
blr
.align 4
L(dLcr1):
- ld rWORD8,-8(r1)
- ld rWORD7,-16(r1)
- li rRTN,1
+ ld rWORD8, -8(r1)
+ ld rWORD7, -16(r1)
+L(dLcr1x):
+ li rRTN, 1
bgtlr cr1
- li rRTN,-1
+ li rRTN, -1
blr
.align 4
L(dLcr6):
- ld rWORD8,-8(r1)
- ld rWORD7,-16(r1)
- li rRTN,1
+ ld rWORD8, -8(r1)
+ ld rWORD7, -16(r1)
+L(dLcr6x):
+ li rRTN, 1
bgtlr cr6
- li rRTN,-1
+ li rRTN, -1
blr
.align 4
L(dLcr5):
- ld rWORD8,-8(r1)
- ld rWORD7,-16(r1)
+ ld rWORD8, -8(r1)
+ ld rWORD7, -16(r1)
L(dLcr5x):
- li rRTN,1
+ li rRTN, 1
bgtlr cr5
- li rRTN,-1
+ li rRTN, -1
blr
.align 4
L(bytealigned):
mtctr rN
- beq cr6,L(zeroLength)
+#if 0
+/* Huh? We've already branched on cr6! */
+ beq cr6, L(zeroLength)
+#endif
/* We need to prime this loop. This loop is swing modulo scheduled
to avoid pipe delays. The dependent instruction latencies (load to
@@ -396,38 +598,38 @@ L(bytealigned):
So we must precondition some registers and condition codes so that
we don't exit the loop early on the first iteration. */
- lbz rWORD1,0(rSTR1)
- lbz rWORD2,0(rSTR2)
+ lbz rWORD1, 0(rSTR1)
+ lbz rWORD2, 0(rSTR2)
bdz L(b11)
- cmpld cr0,rWORD1,rWORD2
- lbz rWORD3,1(rSTR1)
- lbz rWORD4,1(rSTR2)
+ cmpld cr7, rWORD1, rWORD2
+ lbz rWORD3, 1(rSTR1)
+ lbz rWORD4, 1(rSTR2)
bdz L(b12)
- cmpld cr1,rWORD3,rWORD4
- lbzu rWORD5,2(rSTR1)
- lbzu rWORD6,2(rSTR2)
+ cmpld cr1, rWORD3, rWORD4
+ lbzu rWORD5, 2(rSTR1)
+ lbzu rWORD6, 2(rSTR2)
bdz L(b13)
.align 4
L(bLoop):
- lbzu rWORD1,1(rSTR1)
- lbzu rWORD2,1(rSTR2)
- bne cr0,L(bLcr0)
+ lbzu rWORD1, 1(rSTR1)
+ lbzu rWORD2, 1(rSTR2)
+ bne cr7, L(bLcr7)
- cmpld cr6,rWORD5,rWORD6
+ cmpld cr6, rWORD5, rWORD6
bdz L(b3i)
- lbzu rWORD3,1(rSTR1)
- lbzu rWORD4,1(rSTR2)
- bne cr1,L(bLcr1)
+ lbzu rWORD3, 1(rSTR1)
+ lbzu rWORD4, 1(rSTR2)
+ bne cr1, L(bLcr1)
- cmpld cr0,rWORD1,rWORD2
+ cmpld cr7, rWORD1, rWORD2
bdz L(b2i)
- lbzu rWORD5,1(rSTR1)
- lbzu rWORD6,1(rSTR2)
- bne cr6,L(bLcr6)
+ lbzu rWORD5, 1(rSTR1)
+ lbzu rWORD6, 1(rSTR2)
+ bne cr6, L(bLcr6)
- cmpld cr1,rWORD3,rWORD4
+ cmpld cr1, rWORD3, rWORD4
bdnz L(bLoop)
/* We speculatively loading bytes before we have tested the previous
@@ -437,542 +639,727 @@ L(bLoop):
tested. In this case we must complete the pending operations
before returning. */
L(b1i):
- bne cr0,L(bLcr0)
- bne cr1,L(bLcr1)
+ bne cr7, L(bLcr7)
+ bne cr1, L(bLcr1)
b L(bx56)
.align 4
L(b2i):
- bne cr6,L(bLcr6)
- bne cr0,L(bLcr0)
+ bne cr6, L(bLcr6)
+ bne cr7, L(bLcr7)
b L(bx34)
.align 4
L(b3i):
- bne cr1,L(bLcr1)
- bne cr6,L(bLcr6)
+ bne cr1, L(bLcr1)
+ bne cr6, L(bLcr6)
b L(bx12)
.align 4
-L(bLcr0):
- li rRTN,1
- bgtlr cr0
- li rRTN,-1
+L(bLcr7):
+ li rRTN, 1
+ bgtlr cr7
+ li rRTN, -1
blr
L(bLcr1):
- li rRTN,1
+ li rRTN, 1
bgtlr cr1
- li rRTN,-1
+ li rRTN, -1
blr
L(bLcr6):
- li rRTN,1
+ li rRTN, 1
bgtlr cr6
- li rRTN,-1
+ li rRTN, -1
blr
L(b13):
- bne cr0,L(bx12)
- bne cr1,L(bx34)
+ bne cr7, L(bx12)
+ bne cr1, L(bx34)
L(bx56):
- sub rRTN,rWORD5,rWORD6
+ sub rRTN, rWORD5, rWORD6
blr
nop
L(b12):
- bne cr0,L(bx12)
+ bne cr7, L(bx12)
L(bx34):
- sub rRTN,rWORD3,rWORD4
+ sub rRTN, rWORD3, rWORD4
blr
L(b11):
L(bx12):
- sub rRTN,rWORD1,rWORD2
+ sub rRTN, rWORD1, rWORD2
blr
.align 4
-L(zeroLengthReturn):
- ld rWORD8,-8(r1)
- ld rWORD7,-16(r1)
L(zeroLength):
- li rRTN,0
+ li rRTN, 0
blr
.align 4
/* At this point we know the strings have different alignment and the
- compare length is at least 8 bytes. rBITDIF contains the low order
+ compare length is at least 8 bytes. r12 contains the low order
3 bits of rSTR1 and cr5 contains the result of the logical compare
- of rBITDIF to 0. If rBITDIF == 0 then rStr1 is double word
+ of r12 to 0. If r12 == 0 then rStr1 is double word
aligned and can perform the DWunaligned loop.
Otherwise we know that rSTR1 is not already DW aligned yet.
So we can force the string addresses to the next lower DW
- boundary and special case this first DW word using shift left to
+ boundary and special case this first DW using shift left to
eliminate bits preceding the first byte. Since we want to join the
normal (DWaligned) compare loop, starting at the second double word,
we need to adjust the length (rN) and special case the loop
- versioning for the first DW. This insures that the loop count is
+ versioning for the first DW. This ensures that the loop count is
correct and the first DW (shifted) is in the expected resister pair. */
-#define rSHL r29 /* Unaligned shift left count. */
-#define rSHR r28 /* Unaligned shift right count. */
-#define rB r27 /* Left rotation temp for rWORD2. */
-#define rD r26 /* Left rotation temp for rWORD4. */
-#define rF r25 /* Left rotation temp for rWORD6. */
-#define rH r24 /* Left rotation temp for rWORD8. */
-#define rA r0 /* Right rotation temp for rWORD2. */
-#define rC r12 /* Right rotation temp for rWORD4. */
-#define rE r0 /* Right rotation temp for rWORD6. */
-#define rG r12 /* Right rotation temp for rWORD8. */
+#define rSHL r29 /* Unaligned shift left count. */
+#define rSHR r28 /* Unaligned shift right count. */
+#define rWORD8_SHIFT r27 /* Left rotation temp for rWORD2. */
+#define rWORD2_SHIFT r26 /* Left rotation temp for rWORD4. */
+#define rWORD4_SHIFT r25 /* Left rotation temp for rWORD6. */
+#define rWORD6_SHIFT r24 /* Left rotation temp for rWORD8. */
L(unaligned):
- std r29,-24(r1)
- cfi_offset(r29,-24)
- clrldi rSHL,rSTR2,61
- beq cr6,L(duzeroLength)
- std r28,-32(r1)
- cfi_offset(r28,-32)
- beq cr5,L(DWunaligned)
- std r27,-40(r1)
- cfi_offset(r27,-40)
-/* Adjust the logical start of rSTR2 ro compensate for the extra bits
+ std rSHL, -24(r1)
+ cfi_offset(rSHL, -24)
+ clrldi rSHL, rSTR2, 61
+ beq cr6, L(duzeroLength)
+ std rSHR, -32(r1)
+ cfi_offset(rSHR, -32)
+ beq cr5, L(DWunaligned)
+ std rWORD8_SHIFT, -40(r1)
+ cfi_offset(rWORD8_SHIFT, -40)
+/* Adjust the logical start of rSTR2 to compensate for the extra bits
in the 1st rSTR1 DW. */
- sub r27,rSTR2,rBITDIF
+ sub rWORD8_SHIFT, rSTR2, r12
/* But do not attempt to address the DW before that DW that contains
the actual start of rSTR2. */
- clrrdi rSTR2,rSTR2,3
- std r26,-48(r1)
- cfi_offset(r26,-48)
+ clrrdi rSTR2, rSTR2, 3
+ std rWORD2_SHIFT, -48(r1)
+ cfi_offset(rWORD2_SHIFT, -48)
/* Compute the left/right shift counts for the unaligned rSTR2,
compensating for the logical (DW aligned) start of rSTR1. */
- clrldi rSHL,r27,61
- clrrdi rSTR1,rSTR1,3
- std r25,-56(r1)
- cfi_offset(r25,-56)
- sldi rSHL,rSHL,3
- cmpld cr5,r27,rSTR2
- add rN,rN,rBITDIF
- sldi r11,rBITDIF,3
- std r24,-64(r1)
- cfi_offset(r24,-64)
- subfic rSHR,rSHL,64
- srdi rTMP,rN,5 /* Divide by 32 */
- andi. rBITDIF,rN,24 /* Get the DW remainder */
+ clrldi rSHL, rWORD8_SHIFT, 61
+ clrrdi rSTR1, rSTR1, 3
+ std rWORD4_SHIFT, -56(r1)
+ cfi_offset(rWORD4_SHIFT, -56)
+ sldi rSHL, rSHL, 3
+ cmpld cr5, rWORD8_SHIFT, rSTR2
+ add rN, rN, r12
+ sldi rWORD6, r12, 3
+ std rWORD6_SHIFT, -64(r1)
+ cfi_offset(rWORD6_SHIFT, -64)
+ subfic rSHR, rSHL, 64
+ srdi r0, rN, 5 /* Divide by 32 */
+ andi. r12, rN, 24 /* Get the DW remainder */
/* We normally need to load 2 DWs to start the unaligned rSTR2, but in
this special case those bits may be discarded anyway. Also we
must avoid loading a DW where none of the bits are part of rSTR2 as
this may cross a page boundary and cause a page fault. */
- li rWORD8,0
- blt cr5,L(dus0)
- ld rWORD8,0(rSTR2)
- la rSTR2,8(rSTR2)
- sld rWORD8,rWORD8,rSHL
+ li rWORD8, 0
+ blt cr5, L(dus0)
+#ifdef __LITTLE_ENDIAN__
+ ldbrx rWORD8, 0, rSTR2
+ addi rSTR2, rSTR2, 8
+#else
+ ld rWORD8, 0(rSTR2)
+ addi rSTR2, rSTR2, 8
+#endif
+ sld rWORD8, rWORD8, rSHL
L(dus0):
- ld rWORD1,0(rSTR1)
- ld rWORD2,0(rSTR2)
- cmpldi cr1,rBITDIF,16
- cmpldi cr7,rN,32
- srd rG,rWORD2,rSHR
- clrldi rN,rN,61
+#ifdef __LITTLE_ENDIAN__
+ ldbrx rWORD1, 0, rSTR1
+ ldbrx rWORD2, 0, rSTR2
+ addi rSTR1, rSTR1, 8
+ addi rSTR2, rSTR2, 8
+#else
+ ld rWORD1, 0(rSTR1)
+ ld rWORD2, 0(rSTR2)
+#endif
+ cmpldi cr1, r12, 16
+ cmpldi cr7, rN, 32
+ srd r12, rWORD2, rSHR
+ clrldi rN, rN, 61
beq L(duPs4)
- mtctr rTMP
- or rWORD8,rG,rWORD8
- bgt cr1,L(duPs3)
- beq cr1,L(duPs2)
+ mtctr r0
+ or rWORD8, r12, rWORD8
+ bgt cr1, L(duPs3)
+ beq cr1, L(duPs2)
/* Remainder is 8 */
.align 4
L(dusP1):
- sld rB,rWORD2,rSHL
- sld rWORD7,rWORD1,r11
- sld rWORD8,rWORD8,r11
- bge cr7,L(duP1e)
+ sld rWORD8_SHIFT, rWORD2, rSHL
+ sld rWORD7, rWORD1, rWORD6
+ sld rWORD8, rWORD8, rWORD6
+ bge cr7, L(duP1e)
/* At this point we exit early with the first double word compare
complete and remainder of 0 to 7 bytes. See L(du14) for details on
how we handle the remaining bytes. */
- cmpld cr5,rWORD7,rWORD8
- sldi. rN,rN,3
- bne cr5,L(duLcr5)
- cmpld cr7,rN,rSHR
+ cmpld cr5, rWORD7, rWORD8
+ sldi. rN, rN, 3
+ bne cr5, L(duLcr5)
+ cmpld cr7, rN, rSHR
beq L(duZeroReturn)
- li rA,0
- ble cr7,L(dutrim)
- ld rWORD2,8(rSTR2)
- srd rA,rWORD2,rSHR
+ li r0, 0
+ ble cr7, L(dutrim)
+#ifdef __LITTLE_ENDIAN__
+ ldbrx rWORD2, 0, rSTR2
+ addi rSTR2, rSTR2, 8
+#else
+ ld rWORD2, 8(rSTR2)
+#endif
+ srd r0, rWORD2, rSHR
b L(dutrim)
/* Remainder is 16 */
.align 4
L(duPs2):
- sld rH,rWORD2,rSHL
- sld rWORD5,rWORD1,r11
- sld rWORD6,rWORD8,r11
+ sld rWORD6_SHIFT, rWORD2, rSHL
+ sld rWORD5, rWORD1, rWORD6
+ sld rWORD6, rWORD8, rWORD6
b L(duP2e)
/* Remainder is 24 */
.align 4
L(duPs3):
- sld rF,rWORD2,rSHL
- sld rWORD3,rWORD1,r11
- sld rWORD4,rWORD8,r11
+ sld rWORD4_SHIFT, rWORD2, rSHL
+ sld rWORD3, rWORD1, rWORD6
+ sld rWORD4, rWORD8, rWORD6
b L(duP3e)
/* Count is a multiple of 32, remainder is 0 */
.align 4
L(duPs4):
- mtctr rTMP
- or rWORD8,rG,rWORD8
- sld rD,rWORD2,rSHL
- sld rWORD1,rWORD1,r11
- sld rWORD2,rWORD8,r11
+ mtctr r0
+ or rWORD8, r12, rWORD8
+ sld rWORD2_SHIFT, rWORD2, rSHL
+ sld rWORD1, rWORD1, rWORD6
+ sld rWORD2, rWORD8, rWORD6
b L(duP4e)
/* At this point we know rSTR1 is double word aligned and the
compare length is at least 8 bytes. */
.align 4
L(DWunaligned):
- std r27,-40(r1)
- cfi_offset(r27,-40)
- clrrdi rSTR2,rSTR2,3
- std r26,-48(r1)
- cfi_offset(r26,-48)
- srdi rTMP,rN,5 /* Divide by 32 */
- std r25,-56(r1)
- cfi_offset(r25,-56)
- andi. rBITDIF,rN,24 /* Get the DW remainder */
- std r24,-64(r1)
- cfi_offset(r24,-64)
- sldi rSHL,rSHL,3
- ld rWORD6,0(rSTR2)
- ldu rWORD8,8(rSTR2)
- cmpldi cr1,rBITDIF,16
- cmpldi cr7,rN,32
- clrldi rN,rN,61
- subfic rSHR,rSHL,64
- sld rH,rWORD6,rSHL
+ std rWORD8_SHIFT, -40(r1)
+ cfi_offset(rWORD8_SHIFT, -40)
+ clrrdi rSTR2, rSTR2, 3
+ std rWORD2_SHIFT, -48(r1)
+ cfi_offset(rWORD2_SHIFT, -48)
+ srdi r0, rN, 5 /* Divide by 32 */
+ std rWORD4_SHIFT, -56(r1)
+ cfi_offset(rWORD4_SHIFT, -56)
+ andi. r12, rN, 24 /* Get the DW remainder */
+ std rWORD6_SHIFT, -64(r1)
+ cfi_offset(rWORD6_SHIFT, -64)
+ sldi rSHL, rSHL, 3
+#ifdef __LITTLE_ENDIAN__
+ ldbrx rWORD6, 0, rSTR2
+ addi rSTR2, rSTR2, 8
+ ldbrx rWORD8, 0, rSTR2
+ addi rSTR2, rSTR2, 8
+#else
+ ld rWORD6, 0(rSTR2)
+ ldu rWORD8, 8(rSTR2)
+#endif
+ cmpldi cr1, r12, 16
+ cmpldi cr7, rN, 32
+ clrldi rN, rN, 61
+ subfic rSHR, rSHL, 64
+ sld rWORD6_SHIFT, rWORD6, rSHL
beq L(duP4)
- mtctr rTMP
- bgt cr1,L(duP3)
- beq cr1,L(duP2)
+ mtctr r0
+ bgt cr1, L(duP3)
+ beq cr1, L(duP2)
/* Remainder is 8 */
.align 4
L(duP1):
- srd rG,rWORD8,rSHR
- ld rWORD7,0(rSTR1)
- sld rB,rWORD8,rSHL
- or rWORD8,rG,rH
- blt cr7,L(duP1x)
+ srd r12, rWORD8, rSHR
+#ifdef __LITTLE_ENDIAN__
+ ldbrx rWORD7, 0, rSTR1
+ addi rSTR1, rSTR1, 8
+#else
+ ld rWORD7, 0(rSTR1)
+#endif
+ sld rWORD8_SHIFT, rWORD8, rSHL
+ or rWORD8, r12, rWORD6_SHIFT
+ blt cr7, L(duP1x)
L(duP1e):
- ld rWORD1,8(rSTR1)
- ld rWORD2,8(rSTR2)
- cmpld cr5,rWORD7,rWORD8
- srd rA,rWORD2,rSHR
- sld rD,rWORD2,rSHL
- or rWORD2,rA,rB
- ld rWORD3,16(rSTR1)
- ld rWORD4,16(rSTR2)
- cmpld cr0,rWORD1,rWORD2
- srd rC,rWORD4,rSHR
- sld rF,rWORD4,rSHL
- bne cr5,L(duLcr5)
- or rWORD4,rC,rD
- ld rWORD5,24(rSTR1)
- ld rWORD6,24(rSTR2)
- cmpld cr1,rWORD3,rWORD4
- srd rE,rWORD6,rSHR
- sld rH,rWORD6,rSHL
- bne cr0,L(duLcr0)
- or rWORD6,rE,rF
- cmpld cr6,rWORD5,rWORD6
+#ifdef __LITTLE_ENDIAN__
+ ldbrx rWORD1, 0, rSTR1
+ ldbrx rWORD2, 0, rSTR2
+ addi rSTR1, rSTR1, 8
+ addi rSTR2, rSTR2, 8
+#else
+ ld rWORD1, 8(rSTR1)
+ ld rWORD2, 8(rSTR2)
+#endif
+ cmpld cr5, rWORD7, rWORD8
+ srd r0, rWORD2, rSHR
+ sld rWORD2_SHIFT, rWORD2, rSHL
+ or rWORD2, r0, rWORD8_SHIFT
+#ifdef __LITTLE_ENDIAN__
+ ldbrx rWORD3, 0, rSTR1
+ ldbrx rWORD4, 0, rSTR2
+ addi rSTR1, rSTR1, 8
+ addi rSTR2, rSTR2, 8
+#else
+ ld rWORD3, 16(rSTR1)
+ ld rWORD4, 16(rSTR2)
+#endif
+ cmpld cr7, rWORD1, rWORD2
+ srd r12, rWORD4, rSHR
+ sld rWORD4_SHIFT, rWORD4, rSHL
+ bne cr5, L(duLcr5)
+ or rWORD4, r12, rWORD2_SHIFT
+#ifdef __LITTLE_ENDIAN__
+ ldbrx rWORD5, 0, rSTR1
+ ldbrx rWORD6, 0, rSTR2
+ addi rSTR1, rSTR1, 8
+ addi rSTR2, rSTR2, 8
+#else
+ ld rWORD5, 24(rSTR1)
+ ld rWORD6, 24(rSTR2)
+#endif
+ cmpld cr1, rWORD3, rWORD4
+ srd r0, rWORD6, rSHR
+ sld rWORD6_SHIFT, rWORD6, rSHL
+ bne cr7, L(duLcr7)
+ or rWORD6, r0, rWORD4_SHIFT
+ cmpld cr6, rWORD5, rWORD6
b L(duLoop3)
.align 4
/* At this point we exit early with the first double word compare
complete and remainder of 0 to 7 bytes. See L(du14) for details on
how we handle the remaining bytes. */
L(duP1x):
- cmpld cr5,rWORD7,rWORD8
- sldi. rN,rN,3
- bne cr5,L(duLcr5)
- cmpld cr7,rN,rSHR
+ cmpld cr5, rWORD7, rWORD8
+ sldi. rN, rN, 3
+ bne cr5, L(duLcr5)
+ cmpld cr7, rN, rSHR
beq L(duZeroReturn)
- li rA,0
- ble cr7,L(dutrim)
- ld rWORD2,8(rSTR2)
- srd rA,rWORD2,rSHR
+ li r0, 0
+ ble cr7, L(dutrim)
+#ifdef __LITTLE_ENDIAN__
+ ldbrx rWORD2, 0, rSTR2
+ addi rSTR2, rSTR2, 8
+#else
+ ld rWORD2, 8(rSTR2)
+#endif
+ srd r0, rWORD2, rSHR
b L(dutrim)
/* Remainder is 16 */
.align 4
L(duP2):
- srd rE,rWORD8,rSHR
- ld rWORD5,0(rSTR1)
- or rWORD6,rE,rH
- sld rH,rWORD8,rSHL
+ srd r0, rWORD8, rSHR
+#ifdef __LITTLE_ENDIAN__
+ ldbrx rWORD5, 0, rSTR1
+ addi rSTR1, rSTR1, 8
+#else
+ ld rWORD5, 0(rSTR1)
+#endif
+ or rWORD6, r0, rWORD6_SHIFT
+ sld rWORD6_SHIFT, rWORD8, rSHL
L(duP2e):
- ld rWORD7,8(rSTR1)
- ld rWORD8,8(rSTR2)
- cmpld cr6,rWORD5,rWORD6
- srd rG,rWORD8,rSHR
- sld rB,rWORD8,rSHL
- or rWORD8,rG,rH
- blt cr7,L(duP2x)
- ld rWORD1,16(rSTR1)
- ld rWORD2,16(rSTR2)
- cmpld cr5,rWORD7,rWORD8
- bne cr6,L(duLcr6)
- srd rA,rWORD2,rSHR
- sld rD,rWORD2,rSHL
- or rWORD2,rA,rB
- ld rWORD3,24(rSTR1)
- ld rWORD4,24(rSTR2)
- cmpld cr0,rWORD1,rWORD2
- bne cr5,L(duLcr5)
- srd rC,rWORD4,rSHR
- sld rF,rWORD4,rSHL
- or rWORD4,rC,rD
- addi rSTR1,rSTR1,8
- addi rSTR2,rSTR2,8
- cmpld cr1,rWORD3,rWORD4
+#ifdef __LITTLE_ENDIAN__
+ ldbrx rWORD7, 0, rSTR1
+ ldbrx rWORD8, 0, rSTR2
+ addi rSTR1, rSTR1, 8
+ addi rSTR2, rSTR2, 8
+#else
+ ld rWORD7, 8(rSTR1)
+ ld rWORD8, 8(rSTR2)
+#endif
+ cmpld cr6, rWORD5, rWORD6
+ srd r12, rWORD8, rSHR
+ sld rWORD8_SHIFT, rWORD8, rSHL
+ or rWORD8, r12, rWORD6_SHIFT
+ blt cr7, L(duP2x)
+#ifdef __LITTLE_ENDIAN__
+ ldbrx rWORD1, 0, rSTR1
+ ldbrx rWORD2, 0, rSTR2
+ addi rSTR1, rSTR1, 8
+ addi rSTR2, rSTR2, 8
+#else
+ ld rWORD1, 16(rSTR1)
+ ld rWORD2, 16(rSTR2)
+#endif
+ cmpld cr5, rWORD7, rWORD8
+ bne cr6, L(duLcr6)
+ srd r0, rWORD2, rSHR
+ sld rWORD2_SHIFT, rWORD2, rSHL
+ or rWORD2, r0, rWORD8_SHIFT
+#ifdef __LITTLE_ENDIAN__
+ ldbrx rWORD3, 0, rSTR1
+ ldbrx rWORD4, 0, rSTR2
+ addi rSTR1, rSTR1, 8
+ addi rSTR2, rSTR2, 8
+#else
+ ld rWORD3, 24(rSTR1)
+ ld rWORD4, 24(rSTR2)
+#endif
+ cmpld cr7, rWORD1, rWORD2
+ bne cr5, L(duLcr5)
+ srd r12, rWORD4, rSHR
+ sld rWORD4_SHIFT, rWORD4, rSHL
+ or rWORD4, r12, rWORD2_SHIFT
+#ifndef __LITTLE_ENDIAN__
+ addi rSTR1, rSTR1, 8
+ addi rSTR2, rSTR2, 8
+#endif
+ cmpld cr1, rWORD3, rWORD4
b L(duLoop2)
.align 4
L(duP2x):
- cmpld cr5,rWORD7,rWORD8
- addi rSTR1,rSTR1,8
- addi rSTR2,rSTR2,8
- bne cr6,L(duLcr6)
- sldi. rN,rN,3
- bne cr5,L(duLcr5)
- cmpld cr7,rN,rSHR
+ cmpld cr5, rWORD7, rWORD8
+#ifndef __LITTLE_ENDIAN__
+ addi rSTR1, rSTR1, 8
+ addi rSTR2, rSTR2, 8
+#endif
+ bne cr6, L(duLcr6)
+ sldi. rN, rN, 3
+ bne cr5, L(duLcr5)
+ cmpld cr7, rN, rSHR
beq L(duZeroReturn)
- li rA,0
- ble cr7,L(dutrim)
- ld rWORD2,8(rSTR2)
- srd rA,rWORD2,rSHR
+ li r0, 0
+ ble cr7, L(dutrim)
+#ifdef __LITTLE_ENDIAN__
+ ldbrx rWORD2, 0, rSTR2
+ addi rSTR2, rSTR2, 8
+#else
+ ld rWORD2, 8(rSTR2)
+#endif
+ srd r0, rWORD2, rSHR
b L(dutrim)
/* Remainder is 24 */
.align 4
L(duP3):
- srd rC,rWORD8,rSHR
- ld rWORD3,0(rSTR1)
- sld rF,rWORD8,rSHL
- or rWORD4,rC,rH
+ srd r12, rWORD8, rSHR
+#ifdef __LITTLE_ENDIAN__
+ ldbrx rWORD3, 0, rSTR1
+ addi rSTR1, rSTR1, 8
+#else
+ ld rWORD3, 0(rSTR1)
+#endif
+ sld rWORD4_SHIFT, rWORD8, rSHL
+ or rWORD4, r12, rWORD6_SHIFT
L(duP3e):
- ld rWORD5,8(rSTR1)
- ld rWORD6,8(rSTR2)
- cmpld cr1,rWORD3,rWORD4
- srd rE,rWORD6,rSHR
- sld rH,rWORD6,rSHL
- or rWORD6,rE,rF
- ld rWORD7,16(rSTR1)
- ld rWORD8,16(rSTR2)
- cmpld cr6,rWORD5,rWORD6
- bne cr1,L(duLcr1)
- srd rG,rWORD8,rSHR
- sld rB,rWORD8,rSHL
- or rWORD8,rG,rH
- blt cr7,L(duP3x)
- ld rWORD1,24(rSTR1)
- ld rWORD2,24(rSTR2)
- cmpld cr5,rWORD7,rWORD8
- bne cr6,L(duLcr6)
- srd rA,rWORD2,rSHR
- sld rD,rWORD2,rSHL
- or rWORD2,rA,rB
- addi rSTR1,rSTR1,16
- addi rSTR2,rSTR2,16
- cmpld cr0,rWORD1,rWORD2
+#ifdef __LITTLE_ENDIAN__
+ ldbrx rWORD5, 0, rSTR1
+ ldbrx rWORD6, 0, rSTR2
+ addi rSTR1, rSTR1, 8
+ addi rSTR2, rSTR2, 8
+#else
+ ld rWORD5, 8(rSTR1)
+ ld rWORD6, 8(rSTR2)
+#endif
+ cmpld cr1, rWORD3, rWORD4
+ srd r0, rWORD6, rSHR
+ sld rWORD6_SHIFT, rWORD6, rSHL
+ or rWORD6, r0, rWORD4_SHIFT
+#ifdef __LITTLE_ENDIAN__
+ ldbrx rWORD7, 0, rSTR1
+ ldbrx rWORD8, 0, rSTR2
+ addi rSTR1, rSTR1, 8
+ addi rSTR2, rSTR2, 8
+#else
+ ld rWORD7, 16(rSTR1)
+ ld rWORD8, 16(rSTR2)
+#endif
+ cmpld cr6, rWORD5, rWORD6
+ bne cr1, L(duLcr1)
+ srd r12, rWORD8, rSHR
+ sld rWORD8_SHIFT, rWORD8, rSHL
+ or rWORD8, r12, rWORD6_SHIFT
+ blt cr7, L(duP3x)
+#ifdef __LITTLE_ENDIAN__
+ ldbrx rWORD1, 0, rSTR1
+ ldbrx rWORD2, 0, rSTR2
+ addi rSTR1, rSTR1, 8
+ addi rSTR2, rSTR2, 8
+#else
+ ld rWORD1, 24(rSTR1)
+ ld rWORD2, 24(rSTR2)
+#endif
+ cmpld cr5, rWORD7, rWORD8
+ bne cr6, L(duLcr6)
+ srd r0, rWORD2, rSHR
+ sld rWORD2_SHIFT, rWORD2, rSHL
+ or rWORD2, r0, rWORD8_SHIFT
+#ifndef __LITTLE_ENDIAN__
+ addi rSTR1, rSTR1, 16
+ addi rSTR2, rSTR2, 16
+#endif
+ cmpld cr7, rWORD1, rWORD2
b L(duLoop1)
.align 4
L(duP3x):
- addi rSTR1,rSTR1,16
- addi rSTR2,rSTR2,16
- bne cr1,L(duLcr1)
- cmpld cr5,rWORD7,rWORD8
- bne cr6,L(duLcr6)
- sldi. rN,rN,3
- bne cr5,L(duLcr5)
- cmpld cr7,rN,rSHR
+#ifndef __LITTLE_ENDIAN__
+ addi rSTR1, rSTR1, 16
+ addi rSTR2, rSTR2, 16
+#endif
+#if 0
+/* Huh? We've already branched on cr1! */
+ bne cr1, L(duLcr1)
+#endif
+ cmpld cr5, rWORD7, rWORD8
+ bne cr6, L(duLcr6)
+ sldi. rN, rN, 3
+ bne cr5, L(duLcr5)
+ cmpld cr7, rN, rSHR
beq L(duZeroReturn)
- li rA,0
- ble cr7,L(dutrim)
- ld rWORD2,8(rSTR2)
- srd rA,rWORD2,rSHR
+ li r0, 0
+ ble cr7, L(dutrim)
+#ifdef __LITTLE_ENDIAN__
+ ldbrx rWORD2, 0, rSTR2
+ addi rSTR2, rSTR2, 8
+#else
+ ld rWORD2, 8(rSTR2)
+#endif
+ srd r0, rWORD2, rSHR
b L(dutrim)
/* Count is a multiple of 32, remainder is 0 */
.align 4
L(duP4):
- mtctr rTMP
- srd rA,rWORD8,rSHR
- ld rWORD1,0(rSTR1)
- sld rD,rWORD8,rSHL
- or rWORD2,rA,rH
+ mtctr r0
+ srd r0, rWORD8, rSHR
+#ifdef __LITTLE_ENDIAN__
+ ldbrx rWORD1, 0, rSTR1
+ addi rSTR1, rSTR1, 8
+#else
+ ld rWORD1, 0(rSTR1)
+#endif
+ sld rWORD2_SHIFT, rWORD8, rSHL
+ or rWORD2, r0, rWORD6_SHIFT
L(duP4e):
- ld rWORD3,8(rSTR1)
- ld rWORD4,8(rSTR2)
- cmpld cr0,rWORD1,rWORD2
- srd rC,rWORD4,rSHR
- sld rF,rWORD4,rSHL
- or rWORD4,rC,rD
- ld rWORD5,16(rSTR1)
- ld rWORD6,16(rSTR2)
- cmpld cr1,rWORD3,rWORD4
- bne cr0,L(duLcr0)
- srd rE,rWORD6,rSHR
- sld rH,rWORD6,rSHL
- or rWORD6,rE,rF
- ldu rWORD7,24(rSTR1)
- ldu rWORD8,24(rSTR2)
- cmpld cr6,rWORD5,rWORD6
- bne cr1,L(duLcr1)
- srd rG,rWORD8,rSHR
- sld rB,rWORD8,rSHL
- or rWORD8,rG,rH
- cmpld cr5,rWORD7,rWORD8
+#ifdef __LITTLE_ENDIAN__
+ ldbrx rWORD3, 0, rSTR1
+ ldbrx rWORD4, 0, rSTR2
+ addi rSTR1, rSTR1, 8
+ addi rSTR2, rSTR2, 8
+#else
+ ld rWORD3, 8(rSTR1)
+ ld rWORD4, 8(rSTR2)
+#endif
+ cmpld cr7, rWORD1, rWORD2
+ srd r12, rWORD4, rSHR
+ sld rWORD4_SHIFT, rWORD4, rSHL
+ or rWORD4, r12, rWORD2_SHIFT
+#ifdef __LITTLE_ENDIAN__
+ ldbrx rWORD5, 0, rSTR1
+ ldbrx rWORD6, 0, rSTR2
+ addi rSTR1, rSTR1, 8
+ addi rSTR2, rSTR2, 8
+#else
+ ld rWORD5, 16(rSTR1)
+ ld rWORD6, 16(rSTR2)
+#endif
+ cmpld cr1, rWORD3, rWORD4
+ bne cr7, L(duLcr7)
+ srd r0, rWORD6, rSHR
+ sld rWORD6_SHIFT, rWORD6, rSHL
+ or rWORD6, r0, rWORD4_SHIFT
+#ifdef __LITTLE_ENDIAN__
+ ldbrx rWORD7, 0, rSTR1
+ ldbrx rWORD8, 0, rSTR2
+ addi rSTR1, rSTR1, 8
+ addi rSTR2, rSTR2, 8
+#else
+ ldu rWORD7, 24(rSTR1)
+ ldu rWORD8, 24(rSTR2)
+#endif
+ cmpld cr6, rWORD5, rWORD6
+ bne cr1, L(duLcr1)
+ srd r12, rWORD8, rSHR
+ sld rWORD8_SHIFT, rWORD8, rSHL
+ or rWORD8, r12, rWORD6_SHIFT
+ cmpld cr5, rWORD7, rWORD8
bdz L(du24) /* Adjust CTR as we start with +4 */
/* This is the primary loop */
.align 4
L(duLoop):
- ld rWORD1,8(rSTR1)
- ld rWORD2,8(rSTR2)
- cmpld cr1,rWORD3,rWORD4
- bne cr6,L(duLcr6)
- srd rA,rWORD2,rSHR
- sld rD,rWORD2,rSHL
- or rWORD2,rA,rB
+#ifdef __LITTLE_ENDIAN__
+ ldbrx rWORD1, 0, rSTR1
+ ldbrx rWORD2, 0, rSTR2
+ addi rSTR1, rSTR1, 8
+ addi rSTR2, rSTR2, 8
+#else
+ ld rWORD1, 8(rSTR1)
+ ld rWORD2, 8(rSTR2)
+#endif
+ cmpld cr1, rWORD3, rWORD4
+ bne cr6, L(duLcr6)
+ srd r0, rWORD2, rSHR
+ sld rWORD2_SHIFT, rWORD2, rSHL
+ or rWORD2, r0, rWORD8_SHIFT
L(duLoop1):
- ld rWORD3,16(rSTR1)
- ld rWORD4,16(rSTR2)
- cmpld cr6,rWORD5,rWORD6
- bne cr5,L(duLcr5)
- srd rC,rWORD4,rSHR
- sld rF,rWORD4,rSHL
- or rWORD4,rC,rD
+#ifdef __LITTLE_ENDIAN__
+ ldbrx rWORD3, 0, rSTR1
+ ldbrx rWORD4, 0, rSTR2
+ addi rSTR1, rSTR1, 8
+ addi rSTR2, rSTR2, 8
+#else
+ ld rWORD3, 16(rSTR1)
+ ld rWORD4, 16(rSTR2)
+#endif
+ cmpld cr6, rWORD5, rWORD6
+ bne cr5, L(duLcr5)
+ srd r12, rWORD4, rSHR
+ sld rWORD4_SHIFT, rWORD4, rSHL
+ or rWORD4, r12, rWORD2_SHIFT
L(duLoop2):
- ld rWORD5,24(rSTR1)
- ld rWORD6,24(rSTR2)
- cmpld cr5,rWORD7,rWORD8
- bne cr0,L(duLcr0)
- srd rE,rWORD6,rSHR
- sld rH,rWORD6,rSHL
- or rWORD6,rE,rF
+#ifdef __LITTLE_ENDIAN__
+ ldbrx rWORD5, 0, rSTR1
+ ldbrx rWORD6, 0, rSTR2
+ addi rSTR1, rSTR1, 8
+ addi rSTR2, rSTR2, 8
+#else
+ ld rWORD5, 24(rSTR1)
+ ld rWORD6, 24(rSTR2)
+#endif
+ cmpld cr5, rWORD7, rWORD8
+ bne cr7, L(duLcr7)
+ srd r0, rWORD6, rSHR
+ sld rWORD6_SHIFT, rWORD6, rSHL
+ or rWORD6, r0, rWORD4_SHIFT
L(duLoop3):
- ldu rWORD7,32(rSTR1)
- ldu rWORD8,32(rSTR2)
- cmpld cr0,rWORD1,rWORD2
- bne- cr1,L(duLcr1)
- srd rG,rWORD8,rSHR
- sld rB,rWORD8,rSHL
- or rWORD8,rG,rH
+#ifdef __LITTLE_ENDIAN__
+ ldbrx rWORD7, 0, rSTR1
+ ldbrx rWORD8, 0, rSTR2
+ addi rSTR1, rSTR1, 8
+ addi rSTR2, rSTR2, 8
+#else
+ ldu rWORD7, 32(rSTR1)
+ ldu rWORD8, 32(rSTR2)
+#endif
+ cmpld cr7, rWORD1, rWORD2
+ bne cr1, L(duLcr1)
+ srd r12, rWORD8, rSHR
+ sld rWORD8_SHIFT, rWORD8, rSHL
+ or rWORD8, r12, rWORD6_SHIFT
bdnz L(duLoop)
L(duL4):
- bne cr1,L(duLcr1)
- cmpld cr1,rWORD3,rWORD4
- bne cr6,L(duLcr6)
- cmpld cr6,rWORD5,rWORD6
- bne cr5,L(duLcr5)
- cmpld cr5,rWORD7,rWORD8
+#if 0
+/* Huh? We've already branched on cr1! */
+ bne cr1, L(duLcr1)
+#endif
+ cmpld cr1, rWORD3, rWORD4
+ bne cr6, L(duLcr6)
+ cmpld cr6, rWORD5, rWORD6
+ bne cr5, L(duLcr5)
+ cmpld cr5, rWORD7, rWORD8
L(du44):
- bne cr0,L(duLcr0)
+ bne cr7, L(duLcr7)
L(du34):
- bne cr1,L(duLcr1)
+ bne cr1, L(duLcr1)
L(du24):
- bne cr6,L(duLcr6)
+ bne cr6, L(duLcr6)
L(du14):
- sldi. rN,rN,3
- bne cr5,L(duLcr5)
+ sldi. rN, rN, 3
+ bne cr5, L(duLcr5)
/* At this point we have a remainder of 1 to 7 bytes to compare. We use
shift right double to eliminate bits beyond the compare length.
- This allows the use of double word subtract to compute the final
- result.
However it may not be safe to load rWORD2 which may be beyond the
string length. So we compare the bit length of the remainder to
the right shift count (rSHR). If the bit count is less than or equal
we do not need to load rWORD2 (all significant bits are already in
- rB). */
- cmpld cr7,rN,rSHR
+ rWORD8_SHIFT). */
+ cmpld cr7, rN, rSHR
beq L(duZeroReturn)
- li rA,0
- ble cr7,L(dutrim)
- ld rWORD2,8(rSTR2)
- srd rA,rWORD2,rSHR
+ li r0, 0
+ ble cr7, L(dutrim)
+#ifdef __LITTLE_ENDIAN__
+ ldbrx rWORD2, 0, rSTR2
+ addi rSTR2, rSTR2, 8
+#else
+ ld rWORD2, 8(rSTR2)
+#endif
+ srd r0, rWORD2, rSHR
.align 4
L(dutrim):
- ld rWORD1,8(rSTR1)
- ld rWORD8,-8(r1)
- subfic rN,rN,64 /* Shift count is 64 - (rN * 8). */
- or rWORD2,rA,rB
- ld rWORD7,-16(r1)
- ld r29,-24(r1)
- srd rWORD1,rWORD1,rN
- srd rWORD2,rWORD2,rN
- ld r28,-32(r1)
- ld r27,-40(r1)
- li rRTN,0
- cmpld cr0,rWORD1,rWORD2
- ld r26,-48(r1)
- ld r25,-56(r1)
- beq cr0,L(dureturn24)
- li rRTN,1
- ld r24,-64(r1)
- bgtlr cr0
- li rRTN,-1
+#ifdef __LITTLE_ENDIAN__
+ ldbrx rWORD1, 0, rSTR1
+#else
+ ld rWORD1, 8(rSTR1)
+#endif
+ ld rWORD8, -8(r1)
+ subfic rN, rN, 64 /* Shift count is 64 - (rN * 8). */
+ or rWORD2, r0, rWORD8_SHIFT
+ ld rWORD7, -16(r1)
+ ld rSHL, -24(r1)
+ srd rWORD1, rWORD1, rN
+ srd rWORD2, rWORD2, rN
+ ld rSHR, -32(r1)
+ ld rWORD8_SHIFT, -40(r1)
+ li rRTN, 0
+ cmpld cr7, rWORD1, rWORD2
+ ld rWORD2_SHIFT, -48(r1)
+ ld rWORD4_SHIFT, -56(r1)
+ beq cr7, L(dureturn24)
+ li rRTN, 1
+ ld rWORD6_SHIFT, -64(r1)
+ bgtlr cr7
+ li rRTN, -1
blr
.align 4
-L(duLcr0):
- ld rWORD8,-8(r1)
- ld rWORD7,-16(r1)
- li rRTN,1
- bgt cr0,L(dureturn29)
- ld r29,-24(r1)
- ld r28,-32(r1)
- li rRTN,-1
+L(duLcr7):
+ ld rWORD8, -8(r1)
+ ld rWORD7, -16(r1)
+ li rRTN, 1
+ bgt cr7, L(dureturn29)
+ ld rSHL, -24(r1)
+ ld rSHR, -32(r1)
+ li rRTN, -1
b L(dureturn27)
.align 4
L(duLcr1):
- ld rWORD8,-8(r1)
- ld rWORD7,-16(r1)
- li rRTN,1
- bgt cr1,L(dureturn29)
- ld r29,-24(r1)
- ld r28,-32(r1)
- li rRTN,-1
+ ld rWORD8, -8(r1)
+ ld rWORD7, -16(r1)
+ li rRTN, 1
+ bgt cr1, L(dureturn29)
+ ld rSHL, -24(r1)
+ ld rSHR, -32(r1)
+ li rRTN, -1
b L(dureturn27)
.align 4
L(duLcr6):
- ld rWORD8,-8(r1)
- ld rWORD7,-16(r1)
- li rRTN,1
- bgt cr6,L(dureturn29)
- ld r29,-24(r1)
- ld r28,-32(r1)
- li rRTN,-1
+ ld rWORD8, -8(r1)
+ ld rWORD7, -16(r1)
+ li rRTN, 1
+ bgt cr6, L(dureturn29)
+ ld rSHL, -24(r1)
+ ld rSHR, -32(r1)
+ li rRTN, -1
b L(dureturn27)
.align 4
L(duLcr5):
- ld rWORD8,-8(r1)
- ld rWORD7,-16(r1)
- li rRTN,1
- bgt cr5,L(dureturn29)
- ld r29,-24(r1)
- ld r28,-32(r1)
- li rRTN,-1
+ ld rWORD8, -8(r1)
+ ld rWORD7, -16(r1)
+ li rRTN, 1
+ bgt cr5, L(dureturn29)
+ ld rSHL, -24(r1)
+ ld rSHR, -32(r1)
+ li rRTN, -1
b L(dureturn27)
.align 3
L(duZeroReturn):
- li rRTN,0
+ li rRTN, 0
.align 4
L(dureturn):
- ld rWORD8,-8(r1)
- ld rWORD7,-16(r1)
+ ld rWORD8, -8(r1)
+ ld rWORD7, -16(r1)
L(dureturn29):
- ld r29,-24(r1)
- ld r28,-32(r1)
+ ld rSHL, -24(r1)
+ ld rSHR, -32(r1)
L(dureturn27):
- ld r27,-40(r1)
+ ld rWORD8_SHIFT, -40(r1)
L(dureturn26):
- ld r26,-48(r1)
+ ld rWORD2_SHIFT, -48(r1)
L(dureturn25):
- ld r25,-56(r1)
+ ld rWORD4_SHIFT, -56(r1)
L(dureturn24):
- ld r24,-64(r1)
+ ld rWORD6_SHIFT, -64(r1)
blr
L(duzeroLength):
- li rRTN,0
+ li rRTN, 0
blr
END (memcmp)
libc_hidden_builtin_def (memcmp)
-weak_alias (memcmp,bcmp)
+weak_alias (memcmp, bcmp)
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