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-rw-r--r--ChangeLog19
-rw-r--r--sysdeps/ia64/memccpy.S164
-rw-r--r--sysdeps/ia64/memchr.S124
-rw-r--r--sysdeps/ia64/memcmp.S163
-rw-r--r--sysdeps/ia64/memcpy.S265
-rw-r--r--sysdeps/ia64/memmove.S238
-rw-r--r--sysdeps/ia64/memset.S95
-rw-r--r--sysdeps/ia64/softpipe.h29
-rw-r--r--sysdeps/ia64/strcat.S60
-rw-r--r--sysdeps/ia64/strchr.S111
-rw-r--r--sysdeps/ia64/strcmp.S55
-rw-r--r--sysdeps/ia64/strcpy.S142
-rw-r--r--sysdeps/ia64/strlen.S96
-rw-r--r--sysdeps/ia64/strncmp.S63
-rw-r--r--sysdeps/ia64/strncpy.S95
15 files changed, 1718 insertions, 1 deletions
diff --git a/ChangeLog b/ChangeLog
index 223904bc2c..eab82db74d 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,6 +1,23 @@
2000-05-21 Ulrich Drepper <drepper@redhat.com>
- * manual/memory.texi: Document memory handling functions.
+ * sysdeps/ia64/memccpy.S: New file.
+ * sysdeps/ia64/memchr.S: New file.
+ * sysdeps/ia64/memcmp.S: New file.
+ * sysdeps/ia64/memcpy.S: New file.
+ * sysdeps/ia64/memmove.S: New file.
+ * sysdeps/ia64/memset.S: New file.
+ * sysdeps/ia64/strcat.S: New file.
+ * sysdeps/ia64/strchr.S: New file.
+ * sysdeps/ia64/strcmp.S: New file.
+ * sysdeps/ia64/strcpy.S: New file.
+ * sysdeps/ia64/strlen.S: New file.
+ * sysdeps/ia64/strncmp.S: New file.
+ * sysdeps/ia64/strncpy.S: New file.
+ * sysdeps/ia64/softpipe.h: New file.
+ Patches by Dan Pop <Dan.Pop@cern.ch>.
+
+ * manual/memory.texi: Document memory handling functions (mlock,
+ munlock, mlockall, munlockall, brk, and sbrk)
* manual/time.texi: Document timespec and friends.
* manual/conf.texi: Fix references.
* manual/ctype.texi: Likewise.
diff --git a/sysdeps/ia64/memccpy.S b/sysdeps/ia64/memccpy.S
new file mode 100644
index 0000000000..3dd1339d2e
--- /dev/null
+++ b/sysdeps/ia64/memccpy.S
@@ -0,0 +1,164 @@
+/* Optimized version of the memccpy() function.
+ This file is part of the GNU C Library.
+ Copyright (C) 2000 Free Software Foundation, Inc.
+ Contributed by Dan Pop <Dan.Pop@cern.ch>.
+
+ The GNU C Library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Library General Public License as
+ published by the Free Software Foundation; either version 2 of the
+ License, or (at your option) any later version.
+
+ The GNU C Library is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ Library General Public License for more details.
+
+ You should have received a copy of the GNU Library General Public
+ License along with the GNU C Library; see the file COPYING.LIB. If not,
+ write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+ Boston, MA 02111-1307, USA. */
+
+/* Return: a pointer to the next byte after char in dest or NULL
+
+ Inputs:
+ in0: dest
+ in1: src
+ in2: char
+ in3: byte count
+
+ This implementation assumes little endian mode (UM.be = 0).
+
+ This implementation assumes that it is safe to do read ahead
+ in the src block, without getting beyond its limit. */
+
+#include <sysdep.h>
+#undef ret
+
+#define OP_T_THRES 16
+#define OPSIZ 8
+
+#define saved_pfs r14
+#define saved_pr r17
+#define saved_lc r18
+#define dest r19
+#define src r20
+#define len r21
+#define asrc r22
+#define tmp r23
+#define char r24
+#define charx8 r25
+#define sh2 r28
+#define sh1 r29
+#define loopcnt r30
+#define value r31
+
+ENTRY(memccpy)
+ alloc saved_pfs = ar.pfs, 4, 40 - 4, 0, 40
+
+#include "softpipe.h"
+ .rotr r[MEMLAT + 3], tmp1[4], tmp2[4], val[4], tmp3[2], pos0[2]
+ .rotp p[MEMLAT + 6 + 1]
+
+ mov ret0 = r0 // return NULL if no match
+ mov saved_pr = pr // save the predicate registers
+ mov saved_lc = ar.lc // save the loop counter
+ mov dest = in0 // dest
+ mov src = in1 // src
+ extr.u char = in2, 0, 8 // char
+ mov len = in3 // len
+ sub tmp = r0, in0 // tmp = -dest
+ cmp.ne p7, p0 = r0, r0 // clear p7
+ ;;
+ and loopcnt = 7, tmp // loopcnt = -dest % 8
+ cmp.ge p6, p0 = OP_T_THRES, len // is len <= OP_T_THRES
+(p6) br.cond.spnt .cpyfew // copy byte by byte
+ ;;
+ cmp.eq p6, p0 = loopcnt, r0
+ mux1 charx8 = char, @brcst
+(p6) br.cond.sptk .dest_aligned
+ sub len = len, loopcnt // len -= -dest % 8
+ adds loopcnt = -1, loopcnt // --loopcnt
+ ;;
+ mov ar.lc = loopcnt
+.l1: // copy -dest % 8 bytes
+ ld1 value = [src], 1 // value = *src++
+ ;;
+ st1 [dest] = value, 1 // *dest++ = value
+ cmp.eq p6, p0 = value, char
+(p6) br.cond.spnt .foundit
+ br.cloop.dptk .l1
+.dest_aligned:
+ and sh1 = 7, src // sh1 = src % 8
+ and tmp = -8, len // tmp = len & -OPSIZ
+ and asrc = -8, src // asrc = src & -OPSIZ -- align src
+ shr.u loopcnt = len, 3 // loopcnt = len / 8
+ and len = 7, len ;; // len = len % 8
+ shl sh1 = sh1, 3 // sh1 = 8 * (src % 8)
+ adds loopcnt = -1, loopcnt // --loopcnt
+ mov pr.rot = 1 << 16 ;; // set rotating predicates
+ sub sh2 = 64, sh1 // sh2 = 64 - sh1
+ mov ar.lc = loopcnt // set LC
+ cmp.eq p6, p0 = sh1, r0 // is the src aligned?
+(p6) br.cond.sptk .src_aligned ;;
+ add src = src, tmp // src += len & -OPSIZ
+ mov ar.ec = MEMLAT + 6 + 1 // six more passes needed
+ ld8 r[1] = [asrc], 8 // r[1] = w0
+ cmp.ne p6, p0 = r0, r0 ;; // clear p6
+ .align 32
+.l2:
+(p[0]) ld8 r[0] = [asrc], 8 // r[0] = w1
+(p[MEMLAT]) shr.u tmp1[0] = r[1 + MEMLAT], sh1 // tmp1 = w0 >> sh1
+(p[MEMLAT]) shl tmp2[0] = r[0 + MEMLAT], sh2 // tmp2 = w1 << sh2
+(p[MEMLAT+4]) xor tmp3[0] = val[1], charx8
+(p[MEMLAT+5]) czx1.r pos0[0] = tmp3[1]
+(p[MEMLAT+6]) cmp.ne p6, p0 = 8, pos0[1]
+(p6) br.cond.spnt .gotit
+(p[MEMLAT+6]) st8 [dest] = val[3], 8 // store val to dest
+(p[MEMLAT+3]) or val[0] = tmp1[3], tmp2[3] // val = tmp1 | tmp2
+ br.ctop.sptk .l2
+ br.cond.sptk .cpyfew
+.src_aligned:
+ cmp.ne p6, p0 = r0, r0 // clear p6
+ mov ar.ec = MEMLAT + 2 + 1 ;; // set EC
+.l3:
+(p[0]) ld8 r[0] = [src], 8
+(p[MEMLAT]) xor tmp3[0] = r[MEMLAT], charx8
+(p[MEMLAT+1]) czx1.r pos0[0] = tmp3[1]
+(p[MEMLAT+2]) cmp.ne p7, p0 = 8, pos0[1]
+(p7) br.cond.spnt .gotit
+(p[MEMLAT+2]) st8 [dest] = r[MEMLAT+2], 8
+ br.ctop.dptk .l3
+.cpyfew:
+ cmp.eq p6, p0 = len, r0 // is len == 0 ?
+ adds len = -1, len // --len;
+(p6) br.cond.spnt .restore_and_exit ;;
+ mov ar.lc = len
+.l4:
+ ld1 value = [src], 1
+ ;;
+ st1 [dest] = value, 1
+ cmp.eq p6, p0 = value, char
+(p6) br.cond.spnt .foundit
+ br.cloop.dptk .l4 ;;
+.foundit:
+(p6) mov ret0 = dest
+.restore_and_exit:
+ mov ar.pfs = saved_pfs // restore the PFS
+ mov pr = saved_pr, -1 // restore the predicate registers
+ mov ar.lc = saved_lc // restore the loop counter
+ br.ret.sptk.many b0
+.gotit:
+(p6) mov value = val[3] // if coming from l2
+(p7) mov value = r[MEMLAT+2] // if coming from l3
+ mov ar.lc = pos0[1] ;;
+.l5:
+ extr.u tmp = value, 0, 8 ;;
+ st1 [dest] = tmp, 1
+ shr.u value = value, 8
+ br.cloop.sptk .l5 ;;
+ mov ret0 = dest
+ mov ar.pfs = saved_pfs
+ mov pr = saved_pr, -1
+ mov ar.lc = saved_lc
+ br.ret.sptk.many b0
+END(memccpy)
diff --git a/sysdeps/ia64/memchr.S b/sysdeps/ia64/memchr.S
new file mode 100644
index 0000000000..600f5c7a39
--- /dev/null
+++ b/sysdeps/ia64/memchr.S
@@ -0,0 +1,124 @@
+/* Optimized version of the standard memchr() function.
+ This file is part of the GNU C Library.
+ Copyright (C) 2000 Free Software Foundation, Inc.
+ Contributed by Dan Pop <Dan.Pop@cern.ch>.
+
+ The GNU C Library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Library General Public License as
+ published by the Free Software Foundation; either version 2 of the
+ License, or (at your option) any later version.
+
+ The GNU C Library is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ Library General Public License for more details.
+
+ You should have received a copy of the GNU Library General Public
+ License along with the GNU C Library; see the file COPYING.LIB. If not,
+ write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+ Boston, MA 02111-1307, USA. */
+
+/* Return: the address of the first occurence of chr in str or NULL
+
+ Inputs:
+ in0: str
+ in1: chr
+ in2: byte count
+
+ This implementation assumes little endian mode. For big endian mode,
+ the instruction czx1.r should be replaced by czx1.l.
+
+ The algorithm is fairly straightforward: search byte by byte until we
+ we get to a word aligned address, then search word by word as much as
+ possible; the remaining few bytes are searched one at a time.
+
+ The word by word search is performed by xor-ing the word with a word
+ containing chr in every byte. If there is a hit, the result will
+ contain a zero byte in the corresponding position. The presence and
+ position of that zero byte is detected with a czx instruction.
+
+ All the loops in this function could have had the internal branch removed
+ if br.ctop and br.cloop could be predicated :-(. */
+
+#include <sysdep.h>
+#undef ret
+
+#define saved_pfs r14
+#define saved_pr r15
+#define saved_lc r16
+#define chr r17
+#define len r18
+#define pos0 r20
+#define val r21
+#define tmp r24
+#define chrx8 r25
+#define loopcnt r30
+
+#define str in0
+
+ENTRY(memchr)
+ alloc saved_pfs = ar.pfs, 3, 0, 29, 32
+#include "softpipe.h"
+ .rotr value[MEMLAT+1], addr[MEMLAT+3], aux[2], poschr[2]
+ .rotp p[MEMLAT+3]
+ mov saved_lc = ar.lc // save the loop counter
+ mov saved_pr = pr // save the predicates
+ mov ret0 = str
+ and tmp = 7, str // tmp = str % 8
+ cmp.ne p7, p0 = r0, r0 // clear p7
+ extr.u chr = in1, 0, 8 // chr = (unsigned char) in1
+ mov len = in2
+ cmp.gtu p6, p0 = 16, in2 // use a simple loop for short
+(p6) br.cond.spnt .srchfew ;; // searches
+ sub loopcnt = 8, tmp // loopcnt = 8 - tmp
+ cmp.eq p6, p0 = tmp, r0
+(p6) br.cond.sptk .str_aligned;;
+ sub len = len, loopcnt
+ adds loopcnt = -1, loopcnt;;
+ mov ar.lc = loopcnt
+.l1:
+ ld1 val = [ret0], 1
+ ;;
+ cmp.eq p6, p0 = val, chr
+(p6) br.cond.spnt .foundit
+ br.cloop.sptk .l1 ;;
+.str_aligned:
+ cmp.ne p6, p0 = r0, r0 // clear p6
+ shr.u loopcnt = len, 3 // loopcnt = len / 8
+ and len = 7, len ;; // remaining len = len & 7
+ adds loopcnt = -1, loopcnt
+ mov ar.ec = MEMLAT + 3
+ mux1 chrx8 = chr, @brcst ;; // get a word full of chr
+ mov ar.lc = loopcnt
+ mov pr.rot = 1 << 16 ;;
+.l2:
+(p[0]) mov addr[0] = ret0
+(p[0]) ld8 value[0] = [ret0], 8
+(p[MEMLAT]) xor aux[0] = value[MEMLAT], chrx8
+(p[MEMLAT+1]) czx1.r poschr[0] = aux[1]
+(p[MEMLAT+2]) cmp.ne p7, p0 = 8, poschr[1]
+(p7) br.cond.dpnt .foundit
+ br.ctop.dptk .l2
+.srchfew:
+ adds loopcnt = -1, len
+ cmp.eq p6, p0 = len, r0
+(p6) br.cond.spnt .notfound ;;
+ mov ar.lc = loopcnt
+.l3:
+ ld1 val = [ret0], 1
+ ;;
+ cmp.eq p6, p0 = val, chr
+(p6) br.cond.dpnt .foundit
+ br.cloop.sptk .l3 ;;
+.notfound:
+ cmp.ne p6, p0 = r0, r0 // clear p6 (p7 was already 0 when we got here)
+ mov ret0 = r0 ;; // return NULL
+.foundit:
+(p6) adds ret0 = -1, ret0 // if we got here from l1 or l3
+(p7) add ret0 = addr[MEMLAT+2], poschr[1] // if we got here from l2
+ mov pr = saved_pr, -1
+ mov ar.pfs = saved_pfs
+ mov ar.lc = saved_lc
+ br.ret.sptk.many b0
+
+END(memchr)
diff --git a/sysdeps/ia64/memcmp.S b/sysdeps/ia64/memcmp.S
new file mode 100644
index 0000000000..2e4f2ec967
--- /dev/null
+++ b/sysdeps/ia64/memcmp.S
@@ -0,0 +1,163 @@
+/* Optimized version of the standard memcmp() function.
+ This file is part of the GNU C Library.
+ Copyright (C) 2000 Free Software Foundation, Inc.
+ Contributed by Dan Pop <Dan.Pop@cern.ch>.
+
+ The GNU C Library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Library General Public License as
+ published by the Free Software Foundation; either version 2 of the
+ License, or (at your option) any later version.
+
+ The GNU C Library is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ Library General Public License for more details.
+
+ You should have received a copy of the GNU Library General Public
+ License along with the GNU C Library; see the file COPYING.LIB. If not,
+ write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+ Boston, MA 02111-1307, USA. */
+
+/* Return: the result of the comparison
+
+ Inputs:
+ in0: dest (aka s1)
+ in1: src (aka s2)
+ in2: byte count
+
+ In this form, it assumes little endian mode. For big endian mode, the
+ the two shifts in .l2 must be inverted:
+
+ shl tmp1[0] = r[1 + MEMLAT], sh1 // tmp1 = w0 << sh1
+ shr.u tmp2[0] = r[0 + MEMLAT], sh2 // tmp2 = w1 >> sh2
+
+ and all the mux1 instructions should be replaced by plain mov's. */
+
+#include <sysdep.h>
+#undef ret
+
+#define OP_T_THRES 16
+#define OPSIZ 8
+#define MEMLAT 2
+
+#define saved_pfs r14
+#define start r15
+#define saved_pr r17
+#define saved_lc r18
+#define dest r19
+#define src r20
+#define len r21
+#define asrc r22
+#define tmp r23
+#define value1 r24
+#define value2 r25
+#define sh2 r28
+#define sh1 r29
+#define loopcnt r30
+
+ENTRY(memcmp)
+ alloc saved_pfs = ar.pfs, 3, 37, 0, 40
+
+ .rotr r[MEMLAT + 2], q[MEMLAT + 5], tmp1[4], tmp2[4], val[2]
+ .rotp p[MEMLAT + 4 + 1]
+
+ mov ret0 = r0 // by default return value = 0
+ mov saved_pr = pr // save the predicate registers
+ mov saved_lc = ar.lc // save the loop counter
+ mov dest = in0 // dest
+ mov src = in1 // src
+ mov len = in2 // len
+ sub tmp = r0, in0 // tmp = -dest
+ ;;
+ and loopcnt = 7, tmp // loopcnt = -dest % 8
+ cmp.ge p6, p0 = OP_T_THRES, len // is len <= OP_T_THRES
+(p6) br.cond.spnt .cmpfew // compare byte by byte
+ ;;
+ cmp.eq p6, p0 = loopcnt, r0
+(p6) br.cond.sptk .dest_aligned
+ sub len = len, loopcnt // len -= -dest % 8
+ adds loopcnt = -1, loopcnt // --loopcnt
+ ;;
+ mov ar.lc = loopcnt
+.l1: // copy -dest % 8 bytes
+ ld1 value1 = [src], 1 // value = *src++
+ ld1 value2 = [dest], 1
+ ;;
+ cmp.ne p6, p0 = value1, value2
+(p6) br.cond.spnt .done
+ br.cloop.dptk .l1
+.dest_aligned:
+ and sh1 = 7, src // sh1 = src % 8
+ and tmp = -8, len // tmp = len & -OPSIZ
+ and asrc = -8, src // asrc = src & -OPSIZ -- align src
+ shr.u loopcnt = len, 3 // loopcnt = len / 8
+ and len = 7, len ;; // len = len % 8
+ shl sh1 = sh1, 3 // sh1 = 8 * (src % 8)
+ adds loopcnt = -1, loopcnt // --loopcnt
+ mov pr.rot = 1 << 16 ;; // set rotating predicates
+ sub sh2 = 64, sh1 // sh2 = 64 - sh1
+ mov ar.lc = loopcnt // set LC
+ cmp.eq p6, p0 = sh1, r0 // is the src aligned?
+(p6) br.cond.sptk .src_aligned
+ add src = src, tmp // src += len & -OPSIZ
+ mov ar.ec = MEMLAT + 4 + 1 // four more passes needed
+ ld8 r[1] = [asrc], 8 ;; // r[1] = w0
+ .align 32
+
+// We enter this loop with p6 cleared by the above comparison
+
+.l2:
+(p[0]) ld8 r[0] = [asrc], 8 // r[0] = w1
+(p[0]) ld8 q[0] = [dest], 8
+(p[MEMLAT]) shr.u tmp1[0] = r[1 + MEMLAT], sh1 // tmp1 = w0 >> sh1
+(p[MEMLAT]) shl tmp2[0] = r[0 + MEMLAT], sh2 // tmp2 = w1 << sh2
+(p[MEMLAT+4]) cmp.ne p6, p0 = q[MEMLAT + 4], val[1]
+(p[MEMLAT+3]) or val[0] = tmp1[3], tmp2[3] // val = tmp1 | tmp2
+(p6) br.cond.spnt .l2exit
+ br.ctop.sptk .l2
+ br.cond.sptk .cmpfew
+.l3exit:
+ mux1 value1 = r[MEMLAT], @rev
+ mux1 value2 = q[MEMLAT], @rev
+ cmp.ne p6, p0 = r0, r0 ;; // clear p6
+.l2exit:
+(p6) mux1 value1 = val[1], @rev
+(p6) mux1 value2 = q[MEMLAT + 4], @rev ;;
+ cmp.ltu p6, p7 = value2, value1 ;;
+(p6) mov ret0 = -1
+(p7) mov ret0 = 1
+ mov ar.pfs = saved_pfs // restore the PFS
+ mov pr = saved_pr, -1 // restore the predicate registers
+ mov ar.lc = saved_lc // restore the loop counter
+ br.ret.sptk.many b0
+.src_aligned:
+ cmp.ne p6, p0 = r0, r0 // clear p6
+ mov ar.ec = MEMLAT + 1 ;; // set EC
+.l3:
+(p[0]) ld8 r[0] = [src], 8
+(p[0]) ld8 q[0] = [dest], 8
+(p[MEMLAT]) cmp.ne p6, p0 = r[MEMLAT], q[MEMLAT]
+(p6) br.cond.spnt .l3exit
+ br.ctop.dptk .l3 ;;
+.cmpfew:
+ cmp.eq p6, p0 = len, r0 // is len == 0 ?
+ adds len = -1, len // --len;
+(p6) br.cond.spnt .restore_and_exit ;;
+ mov ar.lc = len
+.l4:
+ ld1 value1 = [src], 1
+ ld1 value2 = [dest], 1
+ ;;
+ cmp.ne p6, p0 = value1, value2
+(p6) br.cond.spnt .done
+ br.cloop.dptk .l4 ;;
+.done:
+(p6) sub ret0 = value2, value1 // don't execute it if falling thru
+.restore_and_exit:
+ mov ar.pfs = saved_pfs // restore the PFS
+ mov pr = saved_pr, -1 // restore the predicate registers
+ mov ar.lc = saved_lc // restore the loop counter
+ br.ret.sptk.many b0
+END(memcmp)
+
+weak_alias (memcmp, bcmp)
diff --git a/sysdeps/ia64/memcpy.S b/sysdeps/ia64/memcpy.S
new file mode 100644
index 0000000000..a254202f74
--- /dev/null
+++ b/sysdeps/ia64/memcpy.S
@@ -0,0 +1,265 @@
+/* Optimized version of the standard memcpy() function.
+ This file is part of the GNU C Library.
+ Copyright (C) 1991,92,93,97,98,99 Free Software Foundation, Inc.
+ Contributed by Dan Pop <Dan.Pop@cern.ch>.
+
+ The GNU C Library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Library General Public License as
+ published by the Free Software Foundation; either version 2 of the
+ License, or (at your option) any later version.
+
+ The GNU C Library is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ Library General Public License for more details.
+
+ You should have received a copy of the GNU Library General Public
+ License along with the GNU C Library; see the file COPYING.LIB. If not,
+ write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+ Boston, MA 02111-1307, USA. */
+
+/* Return: dest
+
+ Inputs:
+ in0: dest
+ in1: src
+ in2: byte count
+
+ An assembly implementation of the algorithm used by the generic C
+ version from glibc. The case when all three arguments are multiples
+ of 8 is treated separatedly, for extra performance.
+
+ In this form, it assumes little endian mode. For big endian mode,
+ sh1 must be computed using an extra instruction: sub sh1 = 64, sh1
+ and the order of r[MEMLAT] and r[MEMLAT+1] must be reverted in the
+ shrp instruction. */
+
+#include <sysdep.h>
+#undef ret
+
+#define OP_T_THRES 16
+#define OPSIZ 8
+
+#define saved_pfs r14
+#define sf r15
+#define rescnt r16
+#define saved_pr r17
+#define saved_lc r18
+#define dest r19
+#define src r20
+#define len r21
+#define asrc r22
+#define tmp2 r23
+#define tmp3 r24
+#define tmp4 r25
+#define ptable r26
+#define ploop56 r27
+#define loopaddr r28
+#define sh1 r29
+#define loopcnt r30
+#define value r31
+
+#define dl0 r22
+#define dh0 r23
+#define dl1 r24
+#define dh1 r25
+#define dl2 r26
+#define dh2 r27
+#define dl3 r28
+#define dh3 r29
+
+#define LOOP(shift) \
+ .align 32 ; \
+.loop##shift##: \
+(p[0]) ld8 r[0] = [asrc], 8 ; /* w1 */ \
+(p[MEMLAT+1]) st8 [dest] = value, 8 ; \
+(p[MEMLAT]) shrp value = r[MEMLAT], r[MEMLAT+1], shift ; \
+ nop.b 0 ; \
+ nop.b 0 ; \
+ br.ctop.sptk .loop##shift ; \
+ br.cond.sptk .cpyfew ; /* deal with the remaining bytes */
+
+ENTRY(memcpy)
+ alloc saved_pfs = ar.pfs, 3, 40-3, 0, 40
+#include "softpipe.h"
+ .rotr r[MEMLAT + 2], q[MEMLAT + 1], s0[2], s1[2], s2[2], s3[2]
+ .rotf tl0[5], th0[5], tl1[5], th1[5], tl2[5], th2[5], tl3[5], th3[5]
+ .rotp p[MEMLAT + 2]
+ mov ret0 = in0 // return value = dest
+ mov saved_pr = pr // save the predicate registers
+ brp.loop.many.tk.tk.imp .l0, .done - 16
+ mov saved_lc = ar.lc // save the loop counter
+ or tmp3 = in0, in1 ;; // tmp3 = dest | src
+ or tmp3 = tmp3, in2 // tmp3 = dest | src | len
+ mov dest = in0 // dest
+ mov src = in1 // src
+ mov len = in2 // len
+ sub tmp2 = r0, in0 // tmp2 = -dest
+ cmp.eq p6, p0 = in2, r0 // if (len == 0)
+(p6) br.cond.spnt .restore_and_exit;;// return dest;
+ and tmp4 = 7, tmp3 // tmp4 = (dest | src | len) & 7
+ tbit.nz p8, p0 = src, 3 ;; // test for 16-byte boundary align
+ cmp.ne p6, p0 = tmp4, r0 // if ((dest | src | len) & 7 != 0)
+(p6) br.cond.sptk .next // goto next;
+
+// The optimal case, when dest, src and len are all multiples of 8
+
+(p8) ld8 value = [src], 8 // align src if necessary
+(p8) adds len = -8, len ;; // adjust len accordingly
+ shr.u loopcnt = len, 6 // loopcnt = len / 64
+ shr.u rescnt = len, 3 // rescnt = len / 8
+ mov pr.rot = 1 << 16 // set rotating predicates
+ mov ar.ec = 4 + 1 ;; // set the epilog counter
+ cmp.eq p6, p0 = loopcnt, r0
+ and rescnt = 7, rescnt // resnt = residual word count
+ adds loopcnt = -1, loopcnt // --loopcnt
+(p8) st8 [dest] = value, 8 // copy one word if aligning
+(p6) br.cond.spnt .epilog;; // there are < 8 words to copy
+ add sf = 64 * 4, src
+ mov ar.lc = loopcnt // set the loop counter
+ mov s0[1] = src
+ add s1[1] = 16*1, src
+ add s2[1] = 16*2, src
+ add s3[1] = 16*3, src
+ ;;
+ mov dl0 = dest
+ add dh0 = 8 * 1, dest
+ add dl1 = 8 * 2, dest
+ add dh1 = 8 * 3, dest
+ add dl2 = 8 * 4, dest
+ add dh2 = 8 * 5, dest
+ add dl3 = 8 * 6, dest
+ add dh3 = 8 * 7, dest
+ ;;
+.l0:
+(p[0]) lfetch.nta [sf], 64
+
+(p[0]) ldfp8 tl0[0], th0[0] = [s0[1]]
+(p[0]) ldfp8 tl1[0], th1[0] = [s1[1]]
+(p[0]) ldfp8 tl2[0], th2[0] = [s2[1]]
+(p[0]) ldfp8 tl3[0], th3[0] = [s3[1]]
+
+(p[0]) add s0[0] = 64, s0[1]
+(p[0]) add s1[0] = 64, s1[1]
+(p[0]) add s2[0] = 64, s2[1]
+(p[0]) add s3[0] = 64, s3[1]
+(p[1]) mov src = s0[1] // for the epilog code
+
+(p[4]) stf8 [dl0] = tl0[4], 64
+(p[4]) stf8 [dh0] = th0[4], 64
+(p[4]) stf8 [dl1] = tl1[4], 64
+(p[4]) stf8 [dh1] = th1[4], 64
+(p[4]) stf8 [dl2] = tl2[4], 64
+(p[4]) stf8 [dh2] = th2[4], 64
+(p[4]) stf8 [dl3] = tl3[4], 64
+(p[4]) stf8 [dh3] = th3[4], 64
+
+ br.ctop.sptk.many .l0
+.done:
+ mov dest = dl0
+.epilog:
+ cmp.eq p6, p0 = rescnt, r0 // are there any words left to copy?
+ tbit.nz p10, p0 = rescnt, 0
+(p6) br.cond.spnt .restore_and_exit ;;
+(p10) ld8 r[0] = [src], 8
+ tbit.nz p11, p0 = rescnt, 1 ;;
+(p11) ld8 r[1] = [src], 8
+(p10) st8 [dest] = r[0], 8 ;;
+(p11) ld8 r[2] = [src], 8
+(p11) st8 [dest] = r[1], 8
+ tbit.nz p12, p0 = rescnt, 2 ;;
+(p12) ld8 r[3] = [src], 8
+(p11) st8 [dest] = r[2], 8 ;;
+(p12) ld8 r[4] = [src], 8
+(p12) st8 [dest] = r[3], 8 ;;
+(p12) ld8 r[5] = [src], 8
+(p12) st8 [dest] = r[4], 8
+ mov ar.lc = saved_lc ;; // restore the loop counter
+(p12) ld8 r[6] = [src], 8
+(p12) st8 [dest] = r[5], 8
+ mov ar.pfs = saved_pfs;; // restore the PFS
+(p12) st8 [dest] = r[6]
+ mov pr = saved_pr, -1 // restore the predicate registers
+ br.ret.sptk.many b0
+.next:
+ cmp.ge p6, p0 = OP_T_THRES, len // is len <= OP_T_THRES
+ and loopcnt = 7, tmp2 // loopcnt = -dest % 8
+(p6) br.cond.spnt .cpyfew // copy byte by byte
+ ;;
+ cmp.eq p6, p0 = loopcnt, r0
+(p6) br.cond.sptk .dest_aligned
+ sub len = len, loopcnt // len -= -dest % 8
+ adds loopcnt = -1, loopcnt // --loopcnt
+ ;;
+ mov ar.lc = loopcnt
+.l1: // copy -dest % 8 bytes
+ ld1 value = [src], 1 // value = *src++
+ ;;
+ st1 [dest] = value, 1 // *dest++ = value
+ br.cloop.dptk .l1
+.dest_aligned:
+ and sh1 = 7, src // sh1 = src % 8
+ and tmp2 = -8, len // tmp2 = len & -OPSIZ
+ and asrc = -8, src // asrc = src & -OPSIZ -- align src
+ shr.u loopcnt = len, 3 // loopcnt = len / 8
+ and len = 7, len;; // len = len % 8
+ adds loopcnt = -1, loopcnt // --loopcnt
+ addl tmp4 = @ltoff(.table), gp
+ addl tmp3 = @ltoff(.loop56), gp
+ mov ar.ec = MEMLAT + 1 // set EC
+ mov pr.rot = 1 << 16;; // set rotating predicates
+ mov ar.lc = loopcnt // set LC
+ cmp.eq p6, p0 = sh1, r0 // is the src aligned?
+(p6) br.cond.sptk .src_aligned
+ add src = src, tmp2 // src += len & -OPSIZ
+ shl sh1 = sh1, 3 // sh1 = 8 * (src % 8)
+ ld8 ploop56 = [tmp3] // ploop56 = &loop56
+ ld8 ptable = [tmp4];; // ptable = &table
+ add tmp3 = ptable, sh1;; // tmp3 = &table + sh1
+ mov ar.ec = MEMLAT + 1 + 1 // one more pass needed
+ ld8 tmp4 = [tmp3];; // tmp4 = loop offset
+ sub loopaddr = ploop56,tmp4 // loopadd = &loop56 - loop offset
+ ld8 r[1] = [asrc], 8;; // w0
+ mov b6 = loopaddr;;
+ br b6 // jump to the appropriate loop
+
+ LOOP(8)
+ LOOP(16)
+ LOOP(24)
+ LOOP(32)
+ LOOP(40)
+ LOOP(48)
+ LOOP(56)
+
+.src_aligned:
+.l3:
+(p[0]) ld8 r[0] = [src], 8
+(p[MEMLAT]) st8 [dest] = r[MEMLAT], 8
+ br.ctop.dptk .l3
+.cpyfew:
+ cmp.eq p6, p0 = len, r0 // is len == 0 ?
+ adds len = -1, len // --len;
+(p6) br.cond.spnt .restore_and_exit ;;
+ mov ar.lc = len
+.l4:
+ ld1 value = [src], 1
+ ;;
+ st1 [dest] = value, 1
+ br.cloop.dptk .l4 ;;
+.restore_and_exit:
+ mov ar.pfs = saved_pfs // restore the PFS
+ mov pr = saved_pr, -1 // restore the predicate registers
+ mov ar.lc = saved_lc // restore the loop counter
+ br.ret.sptk.many b0
+ .align 8
+.table:
+ data8 0 // dummy entry
+ data8 .loop56 - .loop8
+ data8 .loop56 - .loop16
+ data8 .loop56 - .loop24
+ data8 .loop56 - .loop32
+ data8 .loop56 - .loop40
+ data8 .loop56 - .loop48
+ data8 .loop56 - .loop56
+
+END(memcpy)
diff --git a/sysdeps/ia64/memmove.S b/sysdeps/ia64/memmove.S
new file mode 100644
index 0000000000..3fc38b9537
--- /dev/null
+++ b/sysdeps/ia64/memmove.S
@@ -0,0 +1,238 @@
+/* Optimized version of the standard memmove() function.
+ This file is part of the GNU C Library.
+ Copyright (C) 2000 Free Software Foundation, Inc.
+ Contributed by Dan Pop <Dan.Pop@cern.ch>.
+
+ The GNU C Library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Library General Public License as
+ published by the Free Software Foundation; either version 2 of the
+ License, or (at your option) any later version.
+
+ The GNU C Library is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ Library General Public License for more details.
+
+ You should have received a copy of the GNU Library General Public
+ License along with the GNU C Library; see the file COPYING.LIB. If not,
+ write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+ Boston, MA 02111-1307, USA. */
+
+/* Return: dest
+
+ Inputs:
+ in0: dest
+ in1: src
+ in2: byte count
+
+ The core of the function is the memcpy implementation used in memcpy.S.
+ When bytes have to be copied backwards, only the easy case, when
+ all arguments are multiples of 8, is optimised.
+
+ In this form, it assumes little endian mode. For big endian mode,
+ sh1 must be computed using an extra instruction: sub sh1 = 64, sh1
+ or the UM.be bit should be cleared at the beginning and set at the end. */
+
+#include <sysdep.h>
+#undef ret
+
+#define OP_T_THRES 16
+#define OPSIZ 8
+
+#define saved_pfs r14
+#define adest r15
+#define saved_pr r17
+#define saved_lc r18
+#define dest r19
+#define src r20
+#define len r21
+#define asrc r22
+#define tmp2 r23
+#define tmp3 r24
+#define tmp4 r25
+#define ptable r26
+#define ploop56 r27
+#define loopaddr r28
+#define sh1 r29
+#define loopcnt r30
+#define value r31
+
+#define LOOP(shift) \
+ .align 32 ; \
+.loop##shift##: \
+(p[0]) ld8 r[0] = [asrc], 8 ; /* w1 */ \
+(p[MEMLAT+1]) st8 [dest] = value, 8 ; \
+(p[MEMLAT]) shrp value = r[MEMLAT], r[MEMLAT+1], shift ; \
+ nop.b 0 ; \
+ nop.b 0 ; \
+ br.ctop.sptk .loop##shift ; \
+ br.cond.sptk .cpyfew ; /* deal with the remaining bytes */
+
+ENTRY(memmove)
+ alloc saved_pfs = ar.pfs, 3, 29, 0, 32
+#include "softpipe.h"
+ .rotr r[MEMLAT + 2], q[MEMLAT + 1]
+ .rotp p[MEMLAT + 2]
+ mov ret0 = in0 // return value = dest
+ mov saved_pr = pr // save the predicate registers
+ mov saved_lc = ar.lc // save the loop counter
+ or tmp3 = in0, in1 ;; // tmp3 = dest | src
+ or tmp3 = tmp3, in2 // tmp3 = dest | src | len
+ mov dest = in0 // dest
+ mov src = in1 // src
+ mov len = in2 // len
+ sub tmp2 = r0, in0 // tmp2 = -dest
+ cmp.eq p6, p0 = in2, r0 // if (len == 0)
+(p6) br.cond.spnt .restore_and_exit;;// return dest;
+ and tmp4 = 7, tmp3 // tmp4 = (dest | src | len) & 7
+ cmp.le p6, p0 = dest, src // if dest <= src it's always safe
+(p6) br.cond.spnt .forward // to copy forward
+ add tmp3 = src, len;;
+ cmp.lt p6, p0 = dest, tmp3 // if dest > src && dest < src + len
+(p6) br.cond.spnt .backward // we have to copy backward
+
+.forward:
+ shr.u loopcnt = len, 4 ;; // loopcnt = len / 16
+ cmp.ne p6, p0 = tmp4, r0 // if ((dest | src | len) & 7 != 0)
+(p6) br.cond.sptk .next // goto next;
+
+// The optimal case, when dest, src and len are all multiples of 8
+
+ and tmp3 = 0xf, len
+ mov pr.rot = 1 << 16 // set rotating predicates
+ mov ar.ec = MEMLAT + 1 ;; // set the epilog counter
+ cmp.ne p6, p0 = tmp3, r0 // do we have to copy an extra word?
+ adds loopcnt = -1, loopcnt;; // --loopcnt
+(p6) ld8 value = [src], 8;;
+(p6) st8 [dest] = value, 8 // copy the "odd" word
+ mov ar.lc = loopcnt // set the loop counter
+ cmp.eq p6, p0 = 8, len
+(p6) br.cond.spnt .restore_and_exit;;// the one-word special case
+ adds adest = 8, dest // set adest one word ahead of dest
+ adds asrc = 8, src ;; // set asrc one word ahead of src
+ nop.b 0 // get the "golden" alignment for
+ nop.b 0 // the next loop
+.l0:
+(p[0]) ld8 r[0] = [src], 16
+(p[0]) ld8 q[0] = [asrc], 16
+(p[MEMLAT]) st8 [dest] = r[MEMLAT], 16
+(p[MEMLAT]) st8 [adest] = q[MEMLAT], 16
+ br.ctop.dptk .l0 ;;
+
+ mov ar.pfs = saved_pfs // restore the PFS
+ mov pr = saved_pr, -1 // restore the predicate registers
+ mov ar.lc = saved_lc // restore the loop counter
+ br.ret.sptk.many b0
+.next:
+ cmp.ge p6, p0 = OP_T_THRES, len // is len <= OP_T_THRES
+ and loopcnt = 7, tmp2 // loopcnt = -dest % 8
+(p6) br.cond.spnt .cpyfew // copy byte by byte
+ ;;
+ cmp.eq p6, p0 = loopcnt, r0
+(p6) br.cond.sptk .dest_aligned
+ sub len = len, loopcnt // len -= -dest % 8
+ adds loopcnt = -1, loopcnt // --loopcnt
+ ;;
+ mov ar.lc = loopcnt
+.l1: // copy -dest % 8 bytes
+ ld1 value = [src], 1 // value = *src++
+ ;;
+ st1 [dest] = value, 1 // *dest++ = value
+ br.cloop.dptk .l1
+.dest_aligned:
+ and sh1 = 7, src // sh1 = src % 8
+ and tmp2 = -8, len // tmp2 = len & -OPSIZ
+ and asrc = -8, src // asrc = src & -OPSIZ -- align src
+ shr.u loopcnt = len, 3 // loopcnt = len / 8
+ and len = 7, len;; // len = len % 8
+ adds loopcnt = -1, loopcnt // --loopcnt
+ addl tmp4 = @ltoff(.table), gp
+ addl tmp3 = @ltoff(.loop56), gp
+ mov ar.ec = MEMLAT + 1 // set EC
+ mov pr.rot = 1 << 16;; // set rotating predicates
+ mov ar.lc = loopcnt // set LC
+ cmp.eq p6, p0 = sh1, r0 // is the src aligned?
+(p6) br.cond.sptk .src_aligned
+ add src = src, tmp2 // src += len & -OPSIZ
+ shl sh1 = sh1, 3 // sh1 = 8 * (src % 8)
+ ld8 ploop56 = [tmp3] // ploop56 = &loop56
+ ld8 ptable = [tmp4];; // ptable = &table
+ add tmp3 = ptable, sh1;; // tmp3 = &table + sh1
+ mov ar.ec = MEMLAT + 1 + 1 // one more pass needed
+ ld8 tmp4 = [tmp3];; // tmp4 = loop offset
+ sub loopaddr = ploop56,tmp4 // loopadd = &loop56 - loop offset
+ ld8 r[1] = [asrc], 8;; // w0
+ mov b6 = loopaddr;;
+ br b6 // jump to the appropriate loop
+
+ LOOP(8)
+ LOOP(16)
+ LOOP(24)
+ LOOP(32)
+ LOOP(40)
+ LOOP(48)
+ LOOP(56)
+
+.src_aligned:
+.l3:
+(p[0]) ld8 r[0] = [src], 8
+(p[MEMLAT]) st8 [dest] = r[MEMLAT], 8
+ br.ctop.dptk .l3
+.cpyfew:
+ cmp.eq p6, p0 = len, r0 // is len == 0 ?
+ adds len = -1, len // --len;
+(p6) br.cond.spnt .restore_and_exit ;;
+ mov ar.lc = len
+.l4:
+ ld1 value = [src], 1
+ ;;
+ st1 [dest] = value, 1
+ br.cloop.dptk .l4 ;;
+.restore_and_exit:
+ mov ar.pfs = saved_pfs // restore the PFS
+ mov pr = saved_pr, -1 // restore the predicate registers
+ mov ar.lc = saved_lc // restore the loop counter
+ br.ret.sptk.many b0
+
+// In the case of a backward copy, optimise only the case when everything
+// is a multiple of 8, otherwise copy byte by byte. The backward copy is
+// used only when the blocks are overlapping and dest > src.
+
+.backward:
+ shr.u loopcnt = len, 3 // loopcnt = len / 8
+ add src = src, len // src points one byte past the end
+ add dest = dest, len ;; // dest points one byte past the end
+ mov ar.ec = MEMLAT + 1 // set the epilog counter
+ mov pr.rot = 1 << 16 // set rotating predicates
+ adds loopcnt = -1, loopcnt // --loopcnt
+ cmp.ne p6, p0 = tmp4, r0 // if ((dest | src | len) & 7 != 0)
+(p6) br.cond.sptk .bytecopy ;; // copy byte by byte backward
+ adds src = -8, src // src points to the last word
+ adds dest = -8, dest // dest points to the last word
+ mov ar.lc = loopcnt;; // set the loop counter
+.l5:
+(p[0]) ld8 r[0] = [src], -8
+(p[MEMLAT]) st8 [dest] = r[MEMLAT], -8
+ br.ctop.dptk .l5
+ br.cond.sptk .restore_and_exit
+.bytecopy:
+ adds src = -1, src // src points to the last byte
+ adds dest = -1, dest // dest points to the last byte
+ adds loopcnt = -1, len;; // loopcnt = len - 1
+ mov ar.lc = loopcnt;; // set the loop counter
+.l6:
+(p[0]) ld1 r[0] = [src], -1
+(p[MEMLAT]) st1 [dest] = r[MEMLAT], -1
+ br.ctop.dptk .l6
+ br.cond.sptk .restore_and_exit
+.table:
+ data8 0 // dummy entry
+ data8 .loop56 - .loop8
+ data8 .loop56 - .loop16
+ data8 .loop56 - .loop24
+ data8 .loop56 - .loop32
+ data8 .loop56 - .loop40
+ data8 .loop56 - .loop48
+ data8 .loop56 - .loop56
+
+END(memmove)
diff --git a/sysdeps/ia64/memset.S b/sysdeps/ia64/memset.S
new file mode 100644
index 0000000000..0ebd9bc72c
--- /dev/null
+++ b/sysdeps/ia64/memset.S
@@ -0,0 +1,95 @@
+/* Optimized version of the standard memset() function.
+ This file is part of the GNU C Library.
+ Copyright (C) 2000 Free Software Foundation, Inc.
+ Contributed by Dan Pop <Dan.Pop@cern.ch>.
+
+ The GNU C Library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Library General Public License as
+ published by the Free Software Foundation; either version 2 of the
+ License, or (at your option) any later version.
+
+ The GNU C Library is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ Library General Public License for more details.
+
+ You should have received a copy of the GNU Library General Public
+ License along with the GNU C Library; see the file COPYING.LIB. If not,
+ write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+ Boston, MA 02111-1307, USA. */
+
+/* Return: dest
+
+ Inputs:
+ in0: dest
+ in1: value
+ in2: count
+
+ The algorithm is fairly straightforward: set byte by byte until we
+ we get to a word aligned address, then set word by word as much as
+ possible; the remaining few bytes are set one by one. */
+
+#include <sysdep.h>
+#undef ret
+
+#define dest in0
+#define byteval in1
+#define cnt in2
+
+#define save_pfs loc0
+#define ptr1 loc1
+#define ptr2 loc2
+#define tmp loc3
+#define loopcnt loc4
+#define save_lc loc5
+#define wordval loc6
+
+ENTRY(memset)
+ alloc save_pfs = ar.pfs, 3, 7, 0, 0
+ mov save_lc = ar.lc
+ mov ret0 = dest
+ and tmp = 7, dest
+ cmp.eq p6, p0 = cnt, r0
+(p6) br.cond.spnt .restore_and_exit ;;
+ mov ptr1 = dest
+ sub loopcnt = 8, tmp
+ cmp.gt p6, p0 = 16, cnt
+(p6) br.cond.spnt .set_few;;
+ cmp.eq p6, p0 = tmp, r0
+(p6) br.cond.sptk .dest_aligned
+ sub cnt = cnt, loopcnt
+ adds loopcnt = -1, loopcnt;;
+ mov ar.lc = loopcnt;;
+.l1:
+ st1 [ptr1] = byteval, 1
+ br.cloop.dptk .l1 ;;
+.dest_aligned:
+ adds ptr2 = 8, ptr1
+ mux1 wordval = byteval, @brcst
+ shr.u loopcnt = cnt, 4 ;; // loopcnt = cnt / 16
+ cmp.eq p6, p0 = loopcnt, r0
+(p6) br.cond.spnt .one_more
+ and cnt = 0xf, cnt // compute the remaining cnt
+ adds loopcnt = -1, loopcnt;;
+ mov ar.lc = loopcnt;;
+.l2:
+ st8 [ptr1] = wordval, 16
+ st8 [ptr2] = wordval, 16
+ br.cloop.dptk .l2
+ cmp.le p6, p0 = 8, cnt ;;
+.one_more:
+(p6) st8 [ptr1] = wordval, 8
+(p6) adds cnt = -8, cnt ;;
+ cmp.eq p6, p0 = cnt, r0
+(p6) br.cond.spnt .restore_and_exit
+.set_few:
+ adds loopcnt = -1, cnt;;
+ mov ar.lc = loopcnt;;
+.l3:
+ st1 [ptr1] = byteval, 1
+ br.cloop.dptk .l3 ;;
+.restore_and_exit:
+ mov ar.lc = save_lc
+ mov ar.pfs = save_pfs
+ br.ret.sptk.many b0
+END(memset)
diff --git a/sysdeps/ia64/softpipe.h b/sysdeps/ia64/softpipe.h
new file mode 100644
index 0000000000..078e18291f
--- /dev/null
+++ b/sysdeps/ia64/softpipe.h
@@ -0,0 +1,29 @@
+/* This file is part of the GNU C Library.
+ Copyright (C) 2000 Free Software Foundation, Inc.
+
+ The GNU C Library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Library General Public License as
+ published by the Free Software Foundation; either version 2 of the
+ License, or (at your option) any later version.
+
+ The GNU C Library is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ Library General Public License for more details.
+
+ You should have received a copy of the GNU Library General Public
+ License along with the GNU C Library; see the file COPYING.LIB. If not,
+ write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+ Boston, MA 02111-1307, USA. */
+
+/* The latency of a memory load assumed by the assembly implementation
+ of the mem and str functions. Since we don't have any clue about
+ where the data might be, let's assume it's in the L2 cache.
+ Assuming L3 would be too pessimistic :-)
+
+ Some functions define MEMLAT as 2, because they expect their data
+ to be in the L1D cache. */
+
+#ifndef MEMLAT
+# define MEMLAT 6
+#endif
diff --git a/sysdeps/ia64/strcat.S b/sysdeps/ia64/strcat.S
new file mode 100644
index 0000000000..d8afacbe09
--- /dev/null
+++ b/sysdeps/ia64/strcat.S
@@ -0,0 +1,60 @@
+/* IA-64 assembly version of the standard strcat() function.
+ This file is part of the GNU C Library.
+ Copyright (C) 2000 Free Software Foundation, Inc.
+ Contributed by Dan Pop <Dan.Pop@cern.ch>.
+
+ The GNU C Library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Library General Public License as
+ published by the Free Software Foundation; either version 2 of the
+ License, or (at your option) any later version.
+
+ The GNU C Library is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ Library General Public License for more details.
+
+ You should have received a copy of the GNU Library General Public
+ License along with the GNU C Library; see the file COPYING.LIB. If not,
+ write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+ Boston, MA 02111-1307, USA. */
+
+/* Return: dest
+
+ Inputs:
+ in0: dest
+ in1: src
+
+ A straightforword implementation: strcpy(dest + strlen(dest), src).
+
+ Could be marginally optimised by inlining the code of strcpy() and
+ strlen(), to avoid the two function calls. OTOH, by not doing that,
+ we avoid L1I cache pollution (code using strcat() is likely to also
+ use strcpy() and strlen(), so we already have a copy of these functions
+ in the cache). */
+
+#include <sysdep.h>
+#undef ret
+
+#define src in1
+#define dest in0
+#define save_pfs loc0
+#define save_b0 loc1
+#define tmp loc2
+#define rc ret0
+
+ENTRY(strcat)
+ alloc save_pfs = ar.pfs, 2, 3, 2, 0
+ mov save_b0 = b0
+ mov out0 = dest
+ mov tmp = gp ;;
+ br.call.sptk.many b0 = strlen# ;; // rc = strlen(dest);
+ mov gp = tmp
+ add out0 = dest, rc
+ mov out1 = src
+ br.call.sptk.many b0 = strcpy# ;; // strcpy(dest + strlen(dest), src)
+ mov gp = tmp
+ mov rc = dest
+ mov b0 = save_b0
+ mov ar.pfs = save_pfs
+ br.ret.sptk.many b0
+END(strcat)
diff --git a/sysdeps/ia64/strchr.S b/sysdeps/ia64/strchr.S
new file mode 100644
index 0000000000..48cbf89fa8
--- /dev/null
+++ b/sysdeps/ia64/strchr.S
@@ -0,0 +1,111 @@
+/* Optimized version of the standard strchr() function.
+ This file is part of the GNU C Library.
+ Copyright (C) 2000 Free Software Foundation, Inc.
+ Contributed by Dan Pop <Dan.Pop@cern.ch>.
+
+ The GNU C Library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Library General Public License as
+ published by the Free Software Foundation; either version 2 of the
+ License, or (at your option) any later version.
+
+ The GNU C Library is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ Library General Public License for more details.
+
+ You should have received a copy of the GNU Library General Public
+ License along with the GNU C Library; see the file COPYING.LIB. If not,
+ write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+ Boston, MA 02111-1307, USA. */
+
+/* Return: the address of the first occurence of chr in str or NULL
+
+ Inputs:
+ in0: str
+ in1: chr
+
+ A modified version of memchr.S, the search ends when the character is
+ found or the terminating null character is encountered.
+
+ This implementation assumes little endian mode. For big endian mode,
+ the instruction czx1.r should be replaced by czx1.l. */
+
+#include <sysdep.h>
+#undef ret
+
+#define saved_pfs r14
+#define saved_lc r18
+#define poschr r19
+#define pos0 r20
+#define val1 r21
+#define val2 r22
+#define tmp r24
+#define chrx8 r25
+#define loopcnt r30
+
+#define str in0
+#define chr in1
+
+ENTRY(strchr)
+ alloc saved_pfs = ar.pfs, 2, 0, 0, 0
+ mov saved_lc = ar.lc // save the loop counter
+ mov ret0 = str
+ and tmp = 7, str // tmp = str % 8
+ mux1 chrx8 = chr, @brcst
+ extr.u chr = chr, 0, 8 // retain only the last byte
+ cmp.ne p8, p0 = r0, r0 // clear p8
+ ;;
+ sub loopcnt = 8, tmp // loopcnt = 8 - tmp
+ cmp.eq p6, p0 = tmp, r0
+(p6) br.cond.sptk .str_aligned;;
+ adds loopcnt = -1, loopcnt;;
+ mov ar.lc = loopcnt
+.l1:
+ ld1 val2 = [ret0], 1
+ ;;
+ cmp.eq p6, p0 = val2, chr
+ cmp.eq p7, p0 = val2, r0
+(p6) br.cond.spnt .restore_and_exit
+(p7) br.cond.spnt .notfound
+ br.cloop.sptk .l1
+.str_aligned:
+ ld8 val1 = [ret0], 8;;
+ nop.b 0
+ nop.b 0
+.l2:
+ ld8.s val2 = [ret0], 8 // don't bomb out here
+ czx1.r pos0 = val1
+ xor tmp = val1, chrx8 // if val1 contains chr, tmp will
+ ;; // contain a zero in its position
+ czx1.r poschr = tmp
+ cmp.ne p6, p0 = 8, pos0
+ ;;
+ cmp.ne p7, p0 = 8, poschr
+(p7) br.cond.spnt .foundit
+(p6) br.cond.spnt .notfound
+ chk.s val2, .recovery
+.back:
+ mov val1 = val2
+ br.cond.dptk .l2
+.foundit:
+(p6) cmp.lt p8, p0 = pos0, poschr // we found chr and null in the word
+(p8) br.cond.spnt .notfound // null was found before chr
+ add ret0 = ret0, poschr ;;
+ adds ret0 = -15, ret0 ;; // should be -16, but we decrement
+.restore_and_exit: // ret0 in the next instruction
+ adds ret0 = -1, ret0 // ret0 was pointing 1 char too far
+ mov ar.pfs = saved_pfs // restore the PFS
+ mov ar.lc = saved_lc // restore the loop counter
+ br.ret.sptk.many b0
+.notfound:
+ mov ret0 = r0 // return NULL if null was found
+ mov ar.pfs = saved_pfs // first
+ mov ar.lc = saved_lc
+ br.ret.sptk.many b0
+.recovery:
+ adds ret0 = -8, ret0;;
+ ld8 val2 = [ret0], 8 // bomb out here
+ br.cond.sptk .back
+END(strchr)
+
+weak_alias(strchr, index)
diff --git a/sysdeps/ia64/strcmp.S b/sysdeps/ia64/strcmp.S
new file mode 100644
index 0000000000..164dd1bd7f
--- /dev/null
+++ b/sysdeps/ia64/strcmp.S
@@ -0,0 +1,55 @@
+/* Optimized version of the standard strcmp() function.
+ This file is part of the GNU C Library.
+ Copyright (C) 2000 Free Software Foundation, Inc.
+ Contributed by Dan Pop <Dan.Pop@cern.ch>.
+
+ The GNU C Library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Library General Public License as
+ published by the Free Software Foundation; either version 2 of the
+ License, or (at your option) any later version.
+
+ The GNU C Library is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ Library General Public License for more details.
+
+ You should have received a copy of the GNU Library General Public
+ License along with the GNU C Library; see the file COPYING.LIB. If not,
+ write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+ Boston, MA 02111-1307, USA. */
+
+/* Return: the result of the comparison
+
+ Inputs:
+ in0: s1
+ in1: s2
+
+ Unlike memcmp(), this function is optimized for mismatches within the
+ first few characters. */
+
+#include <sysdep.h>
+#undef ret
+
+#define s1 in0
+#define s2 in1
+
+#define saved_pfs r14
+#define val1 r15
+#define val2 r16
+
+
+ENTRY(strcmp)
+ alloc saved_pfs = ar.pfs, 2, 0, 0, 0
+.loop:
+ ld1 val1 = [s1], 1
+ ld1 val2 = [s2], 1
+ cmp.eq p6, p0 = r0, r0 // set p6
+ ;;
+ cmp.ne.and p6, p0 = val1, r0
+ cmp.ne.and p6, p0 = val2, r0
+ cmp.eq.and p6, p0 = val1, val2
+(p6) br.cond.sptk .loop
+ sub ret0 = val1, val2
+ mov ar.pfs = saved_pfs
+ br.ret.sptk.many b0
+END(strcmp)
diff --git a/sysdeps/ia64/strcpy.S b/sysdeps/ia64/strcpy.S
new file mode 100644
index 0000000000..1250edec70
--- /dev/null
+++ b/sysdeps/ia64/strcpy.S
@@ -0,0 +1,142 @@
+/* Optimized version of the standard strcpy() function.
+ This file is part of the GNU C Library.
+ Copyright (C) 2000 Free Software Foundation, Inc.
+ Contributed by Dan Pop <Dan.Pop@cern.ch>.
+
+ The GNU C Library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Library General Public License as
+ published by the Free Software Foundation; either version 2 of the
+ License, or (at your option) any later version.
+
+ The GNU C Library is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ Library General Public License for more details.
+
+ You should have received a copy of the GNU Library General Public
+ License along with the GNU C Library; see the file COPYING.LIB. If not,
+ write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+ Boston, MA 02111-1307, USA. */
+
+/* Return: dest
+
+ Inputs:
+ in0: dest
+ in1: src
+
+ In this form, it assumes little endian mode. For big endian mode, the
+ the two shifts in .l2 must be inverted:
+
+ shl value = r[1], sh1 // value = w0 << sh1
+ shr.u tmp = r[0], sh2 // tmp = w1 >> sh2
+ */
+
+#include <sysdep.h>
+#undef ret
+
+#define saved_pfs r14
+#define saved_lc r15
+#define saved_pr r16
+#define thresh r17
+#define dest r19
+#define src r20
+#define len r21
+#define asrc r22
+#define tmp r23
+#define pos r24
+#define w0 r25
+#define w1 r26
+#define c r27
+#define sh2 r28
+#define sh1 r29
+#define loopcnt r30
+#define value r31
+
+ENTRY(strcpy)
+ alloc saved_pfs = ar.pfs, 2, 0, 30, 32
+
+#define MEMLAT 2
+ .rotr r[MEMLAT + 2]
+ .rotp p[MEMLAT + 1]
+
+ mov ret0 = in0 // return value = dest
+ mov saved_pr = pr // save the predicate registers
+ mov saved_lc = ar.lc // save the loop counter
+ sub tmp = r0, in0 ;; // tmp = -dest
+ mov dest = in0 // dest
+ mov src = in1 // src
+ and loopcnt = 7, tmp ;; // loopcnt = -dest % 8
+ cmp.eq p6, p0 = loopcnt, r0
+ adds loopcnt = -1, loopcnt // --loopcnt
+(p6) br.cond.sptk .dest_aligned ;;
+ mov ar.lc = loopcnt
+.l1: // copy -dest % 8 bytes
+ ld1 c = [src], 1 // c = *src++
+ ;;
+ st1 [dest] = c, 1 // *dest++ = c
+ cmp.eq p6, p0 = c, r0
+(p6) br.cond.dpnt .restore_and_exit
+ br.cloop.dptk .l1 ;;
+.dest_aligned:
+ and sh1 = 7, src // sh1 = src % 8
+ mov ar.lc = -1 // "infinite" loop
+ and asrc = -8, src ;; // asrc = src & -OPSIZ -- align src
+ sub thresh = 8, sh1
+ mov pr.rot = 1 << 16 // set rotating predicates
+ cmp.ne p7, p0 = r0, r0 // clear p7
+ shl sh1 = sh1, 3 ;; // sh1 = 8 * (src % 8)
+ sub sh2 = 64, sh1 // sh2 = 64 - sh1
+ cmp.eq p6, p0 = sh1, r0 // is the src aligned?
+(p6) br.cond.sptk .src_aligned ;;
+ ld8 r[1] = [asrc],8 ;;
+
+ .align 32
+.l2:
+ ld8.s r[0] = [asrc], 8
+ shr.u value = r[1], sh1 ;; // value = w0 >> sh1
+ czx1.r pos = value ;; // do we have an "early" zero
+ cmp.lt p7, p0 = pos, thresh // in w0 >> sh1?
+(p7) br.cond.dpnt .found0
+ chk.s r[0], .recovery2 // it is safe to do that only
+.back2: // after the previous test
+ shl tmp = r[0], sh2 // tmp = w1 << sh2
+ ;;
+ or value = value, tmp ;; // value |= tmp
+ czx1.r pos = value ;;
+ cmp.ne p7, p0 = 8, pos
+(p7) br.cond.dpnt .found0
+ st8 [dest] = value, 8 // store val to dest
+ br.ctop.dptk .l2 ;;
+.src_aligned:
+.l3:
+(p[0]) ld8.s r[0] = [src], 8
+(p[MEMLAT]) chk.s r[MEMLAT], .recovery3
+.back3:
+(p[MEMLAT]) mov value = r[MEMLAT]
+(p[MEMLAT]) czx1.r pos = r[MEMLAT] ;;
+(p[MEMLAT]) cmp.ne p7, p0 = 8, pos
+(p7) br.cond.dpnt .found0
+(p[MEMLAT]) st8 [dest] = r[MEMLAT], 8
+ br.ctop.dptk .l3 ;;
+.found0:
+ mov ar.lc = pos
+.l4:
+ extr.u c = value, 0, 8 // c = value & 0xff
+ shr.u value = value, 8
+ ;;
+ st1 [dest] = c, 1
+ br.cloop.dptk .l4 ;;
+.restore_and_exit:
+ mov ar.pfs = saved_pfs // restore the PFS
+ mov ar.lc = saved_lc // restore the loop counter
+ mov pr = saved_pr, -1 // restore the predicate registers
+ br.ret.sptk.many b0
+.recovery2:
+ add tmp = -8, asrc ;;
+ ld8 r[MEMLAT] = [tmp]
+ br.cond.sptk .back2
+.recovery3:
+ add tmp = -(MEMLAT + 1) * 8, src ;;
+ ld8 r[MEMLAT] = [tmp]
+ br.cond.sptk .back3
+END(strcpy)
diff --git a/sysdeps/ia64/strlen.S b/sysdeps/ia64/strlen.S
new file mode 100644
index 0000000000..32079f9b68
--- /dev/null
+++ b/sysdeps/ia64/strlen.S
@@ -0,0 +1,96 @@
+/* Optimized version of the standard strlen() function.
+ This file is part of the GNU C Library.
+ Copyright (C) 2000 Free Software Foundation, Inc.
+ Contributed by Dan Pop <Dan.Pop@cern.ch>.
+
+ The GNU C Library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Library General Public License as
+ published by the Free Software Foundation; either version 2 of the
+ License, or (at your option) any later version.
+
+ The GNU C Library is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ Library General Public License for more details.
+
+ You should have received a copy of the GNU Library General Public
+ License along with the GNU C Library; see the file COPYING.LIB. If not,
+ write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+ Boston, MA 02111-1307, USA. */
+
+/* Return: the length of the input string
+
+ Input:
+ in0: str
+
+ Look for the null character byte by byte, until we reach a word aligned
+ address, then search word by word, using the czx instruction. We're
+ also doing one word of read ahead, which could cause problems if the
+ null character is on the last word of a page and the next page is not
+ mapped in the process address space. Hence the use of the speculative
+ load.
+
+ This implementation assumes little endian mode. For big endian mode,
+ the instruction czx1.r should be replaced by czx1.l. */
+
+#include <sysdep.h>
+#undef ret
+
+#define saved_pfs r14
+#define saved_lc r18
+#define str r19
+#define pos0 r20
+#define val1 r21
+#define val2 r22
+#define origadd r23
+#define tmp r24
+#define loopcnt r30
+#define len ret0
+
+ENTRY(strlen)
+ alloc saved_pfs = ar.pfs, 1, 0, 0, 0
+ mov saved_lc = ar.lc // save the loop counter
+ mov str = in0
+ mov len = r0 // len = 0
+ and tmp = 7, in0 // tmp = str % 8
+ ;;
+ sub loopcnt = 8, tmp // loopcnt = 8 - tmp
+ cmp.eq p6, p0 = tmp, r0
+(p6) br.cond.sptk .str_aligned;;
+ adds loopcnt = -1, loopcnt;;
+ mov ar.lc = loopcnt
+.l1:
+ ld1 val2 = [str], 1
+ ;;
+ cmp.eq p6, p0 = val2, r0
+(p6) br.cond.spnt .restore_and_exit
+ adds len = 1, len
+ br.cloop.dptk .l1
+.str_aligned:
+ mov origadd = str // origadd = orig
+ ld8 val1 = [str], 8;;
+ nop.b 0
+ nop.b 0
+l2: ld8.s val2 = [str], 8 // don't bomb out here
+ czx1.r pos0 = val1
+ ;;
+ cmp.ne p6, p0 = 8, pos0
+(p6) br.cond.spnt .foundit
+ chk.s val2, .recovery
+.back:
+ mov val1 = val2
+ br.cond.dptk l2
+.foundit:
+ sub tmp = str, origadd // tmp = crt address - orig
+ add len = len, pos0;;
+ add len = len, tmp;;
+ adds len = -16, len
+.restore_and_exit:
+ mov ar.pfs = saved_pfs // restore the PFS
+ mov ar.lc = saved_lc // restore the loop counter
+ br.ret.sptk.many b0
+.recovery:
+ adds str = -8, str;;
+ ld8 val2 = [str], 8 // bomb out here
+ br.cond.sptk .back
+END(strlen)
diff --git a/sysdeps/ia64/strncmp.S b/sysdeps/ia64/strncmp.S
new file mode 100644
index 0000000000..d24bcdf680
--- /dev/null
+++ b/sysdeps/ia64/strncmp.S
@@ -0,0 +1,63 @@
+/* Optimized version of the standard strncmp() function.
+ This file is part of the GNU C Library.
+ Copyright (C) 2000 Free Software Foundation, Inc.
+ Contributed by Dan Pop <Dan.Pop@cern.ch>.
+
+ The GNU C Library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Library General Public License as
+ published by the Free Software Foundation; either version 2 of the
+ License, or (at your option) any later version.
+
+ The GNU C Library is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ Library General Public License for more details.
+
+ You should have received a copy of the GNU Library General Public
+ License along with the GNU C Library; see the file COPYING.LIB. If not,
+ write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+ Boston, MA 02111-1307, USA. */
+
+/* Return: the result of the comparison
+
+ Inputs:
+ in0: s1
+ in1: s2
+ in2: n
+
+ Unlike memcmp(), this function is optimized for mismatches within the
+ first few characters. */
+
+#include <sysdep.h>
+#undef ret
+
+#define s1 in0
+#define s2 in1
+#define n in2
+
+#define saved_pfs r14
+#define val1 r15
+#define val2 r16
+
+
+ENTRY(strncmp)
+ alloc saved_pfs = ar.pfs, 3, 0, 0, 0
+ mov ret0 = r0
+ cmp.eq p6, p0 = r0, r0 // set p6
+ cmp.eq p7, p0 = n, r0 // return immediately if n == 0
+(p7) br.cond.spnt .restore_and_exit ;;
+.loop:
+ ld1 val1 = [s1], 1
+ ld1 val2 = [s2], 1
+ adds n = -1, n // n--
+ ;;
+ cmp.ne.and p6, p0 = val1, r0
+ cmp.ne.and p6, p0 = val2, r0
+ cmp.ne.and p6, p0 = n, r0
+ cmp.eq.and p6, p0 = val1, val2
+(p6) br.cond.sptk .loop
+ sub ret0 = val1, val2
+.restore_and_exit:
+ mov ar.pfs = saved_pfs
+ br.ret.sptk.many b0
+END(strncmp)
diff --git a/sysdeps/ia64/strncpy.S b/sysdeps/ia64/strncpy.S
new file mode 100644
index 0000000000..96f19c47fa
--- /dev/null
+++ b/sysdeps/ia64/strncpy.S
@@ -0,0 +1,95 @@
+/* Optimized version of the standard strncpy() function.
+ This file is part of the GNU C Library.
+ Copyright (C) 2000 Free Software Foundation, Inc.
+ Contributed by Dan Pop <Dan.Pop@cern.ch>.
+
+ The GNU C Library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Library General Public License as
+ published by the Free Software Foundation; either version 2 of the
+ License, or (at your option) any later version.
+
+ The GNU C Library is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ Library General Public License for more details.
+
+ You should have received a copy of the GNU Library General Public
+ License along with the GNU C Library; see the file COPYING.LIB. If not,
+ write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+ Boston, MA 02111-1307, USA. */
+
+/* Return: dest
+
+ Inputs:
+ in0: dest
+ in1: src
+ in2: char count
+
+ If n >= 24, do a memcpy(dest, src, min(strlen(src)+1, n)), followed by a
+ memset(dest + strlen(src), 0, n - strlen(src) - 1) if necessary.
+
+ Otherwise, copy characters one by one and fill with nulls if necessary. */
+
+#include <sysdep.h>
+#undef ret
+
+#define saved_pfs loc0
+#define saved_b0 loc1
+#define saved_pr loc2
+#define saved_lc loc3
+#define tmp loc4
+#define len loc5
+
+#define dest in0
+#define src in1
+#define n in2
+
+#define rc ret0
+
+ENTRY(strncpy)
+ alloc saved_pfs = ar.pfs, 3, 6, 3, 0
+ mov saved_b0 = b0
+ mov saved_pr = pr
+ mov saved_lc = ar.lc
+ cmp.gtu p6, p0 = 24, n
+(p6) br.cond.spnt .cpyfew
+ mov out0 = src
+ mov tmp = gp ;;
+ br.call.sptk.many b0 = strlen# ;; // rc = strlen(src);
+ add len = 1, rc // include the null in len
+ mov gp = tmp
+ mov out0 = dest ;;
+ cmp.ltu p4, p5 = len, n
+ mov out1 = src ;;
+(p4) mov out2 = len
+(p5) mov out2 = n
+ br.call.sptk.many b0 = memcpy# ;; // memcpy(dest, src, min(len, n));
+ mov gp = tmp
+(p4) add out0 = dest, len
+(p4) mov out1 = r0
+(p4) sub out2 = n, len
+(p4) br.call.sptk.many b0 = memset# ;; // fill the rest with nulls
+(p4) mov gp = tmp
+ mov rc = dest
+ mov b0 = saved_b0
+ mov ar.pfs = saved_pfs
+ mov pr = saved_pr, -1
+ br.ret.sptk.many b0
+.cpyfew:
+ mov rc = dest
+ cmp.eq p6, p0 = n, r0
+ adds n = -1, n
+(p6) br.cond.spnt .restore_and_exit ;; // do nothing if n == 0
+ mov ar.lc = n
+ cmp.eq p6, p0 = r0, r0 ;; // set p6
+.loop:
+(p6) ld1 tmp = [src],1
+ ;;
+ st1 [dest] = tmp, 1
+(p6) cmp.ne p6, p0 = tmp, r0 // clear p6 after encountering the
+ br.cloop.dptk .loop ;; // null character in src
+.restore_and_exit:
+ mov ar.lc = saved_lc
+ mov ar.pfs = saved_pfs
+ br.ret.sptk.many b0
+END(strncpy)
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