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Diffstat (limited to 'powerpc-cpu/sysdeps/powerpc/powerpc32/power6/memcpy.S')
| -rw-r--r-- | powerpc-cpu/sysdeps/powerpc/powerpc32/power6/memcpy.S | 842 |
1 files changed, 0 insertions, 842 deletions
diff --git a/powerpc-cpu/sysdeps/powerpc/powerpc32/power6/memcpy.S b/powerpc-cpu/sysdeps/powerpc/powerpc32/power6/memcpy.S deleted file mode 100644 index e8d56eb135..0000000000 --- a/powerpc-cpu/sysdeps/powerpc/powerpc32/power6/memcpy.S +++ /dev/null @@ -1,842 +0,0 @@ -/* Optimized memcpy implementation for PowerPC32 on POWER6. - Copyright (C) 2003, 2006 Free Software Foundation, Inc. - This file is part of the GNU C Library. - - The GNU C Library is free software; you can redistribute it and/or - modify it under the terms of the GNU Lesser General Public - License as published by the Free Software Foundation; either - version 2.1 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 - Lesser General Public License for more details. - - You should have received a copy of the GNU Lesser General Public - License along with the GNU C Library; if not, write to the Free - Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA - 02110-1301 USA. */ - -#include <sysdep.h> -#include <bp-sym.h> -#include <bp-asm.h> - -/* __ptr_t [r3] memcpy (__ptr_t dst [r3], __ptr_t src [r4], size_t len [r5]); - Returns 'dst'. - - Memcpy handles short copies (< 32-bytes) using a binary move blocks - (no loops) of lwz/stw. The tail (remaining 1-3) bytes is handled - with the appropriate combination of byte and halfword load/stores. - There is minimal effort to optimize the alignment of short moves. - - Longer moves (>= 32-bytes) justify the effort to get at least the - destination word (4-byte) aligned. Further optimization is - possible when both source and destination are word aligned. - Each case has an optimized unrolled loop. */ - -EALIGN (BP_SYM (memcpy), 5, 0) - CALL_MCOUNT - - stwu 1,-32(1) - cfi_adjust_cfa_offset(32) - cmplwi cr1,5,31 /* check for short move. */ - neg 0,3 - cmplwi cr1,5,31 - clrlwi 10,4,30 /* check alignment of src. */ - andi. 11,3,3 /* check alignment of dst. */ - clrlwi 0,0,30 /* Number of bytes until the 1st word of dst. */ - ble- cr1,L(word_unaligned_short) /* If move < 32 bytes. */ - cmplw cr6,10,11 - stw 31,24(1) - cfi_offset(31,(24-32)) - stw 30,20(1) - cfi_offset(30,(20-32)) - mr 30,3 - beq .L0 - mtcrf 0x01,0 - subf 31,0,5 /* Length after alignment. */ - add 12,4,0 /* Compute src addr after alignment. */ - /* Move 0-3 bytes as needed to get the destination word aligned. */ -1: bf 31,2f - lbz 6,0(4) - bf 30,3f - lhz 7,1(4) - stb 6,0(3) - sth 7,1(3) - addi 3,3,3 - b 0f -3: - stb 6,0(3) - addi 3,3,1 - b 0f -2: bf 30,0f - lhz 6,0(4) - sth 6,0(3) - addi 3,3,2 -0: - clrlwi 10,12,30 /* check alignment of src again. */ - srwi 9,31,2 /* Number of full words remaining. */ - bne- cr6,L(wdu) /* If source is not word aligned. .L6 */ - clrlwi 11,31,30 /* calculate the number of tail bytes */ - b L(word_aligned) - /* Copy words from source to destination, assuming the destination is - aligned on a word boundary. - - At this point we know there are at least 29 bytes left (32-3) to copy. - The next step is to determine if the source is also word aligned. - If not branch to the unaligned move code at .L6. which uses - a load, shift, store strategy. - - Otherwise source and destination are word aligned, and we can use - the optimized word copy loop. */ - .align 4 -.L0: - mr 31,5 - mr 12,4 - bne- cr6,L(wdu) /* If source is not word aligned. .L6 */ - srwi 9,5,2 /* Number of full words remaining. */ - clrlwi 11,5,30 /* calculate the number of tail bytes */ - - /* Move words where destination and source are word aligned. - Use an unrolled loop to copy 4 words (16-bytes) per iteration. - If the the copy is not an exact multiple of 16 bytes, 1-3 - words are copied as needed to set up the main loop. After - the main loop exits there may be a tail of 1-3 bytes. These bytes are - copied a halfword/byte at a time as needed to preserve alignment. */ -L(word_aligned): - mtcrf 0x01,9 - srwi 8,31,4 /* calculate the 16 byte loop count */ - cmplwi cr1,9,4 - cmplwi cr6,11,0 - mr 11,12 - - bf 30,1f - lwz 6,0(12) - lwz 7,4(12) - addi 11,12,8 - mtctr 8 - stw 6,0(3) - stw 7,4(3) - addi 10,3,8 - bf 31,4f - lwz 0,8(12) - stw 0,8(3) - blt cr1,3f - addi 11,12,12 - addi 10,3,12 - b 4f - .align 4 -1: - mr 10,3 - mtctr 8 - bf 31,4f - lwz 6,0(12) - addi 11,12,4 - stw 6,0(3) - addi 10,3,4 - - .align 4 -4: - lwz 6,0(11) - lwz 7,4(11) - lwz 8,8(11) - lwz 0,12(11) - stw 6,0(10) - stw 7,4(10) - stw 8,8(10) - stw 0,12(10) - addi 11,11,16 - addi 10,10,16 - bdnz 4b -3: - clrrwi 0,31,2 - mtcrf 0x01,31 - beq cr6,0f -.L9: - add 3,3,0 - add 12,12,0 - -/* At this point we have a tail of 0-3 bytes and we know that the - destination is word aligned. */ -2: bf 30,1f - lhz 6,0(12) - addi 12,12,2 - sth 6,0(3) - addi 3,3,2 -1: bf 31,0f - lbz 6,0(12) - stb 6,0(3) -0: - /* Return original dst pointer. */ - mr 3,30 - lwz 30,20(1) - lwz 31,24(1) - addi 1,1,32 - blr - -/* Copy up to 31 bytes. This divided into two cases 0-8 bytes and 9-31 - bytes. Each case is handled without loops, using binary (1,2,4,8) - tests. - - In the short (0-8 byte) case no attempt is made to force alignment - of either source or destination. The hardware will handle the - unaligned load/stores with small delays for crossing 32- 128-byte, - and 4096-byte boundaries. Since these short moves are unlikely to be - unaligned or cross these boundaries, the overhead to force - alignment is not justified. - - The longer (9-31 byte) move is more likely to cross 32- or 128-byte - boundaries. Since only loads are sensitive to the 32-/128-byte - boundaries it is more important to align the source then the - destination. If the source is not already word aligned, we first - move 1-3 bytes as needed. Since we are only word aligned we don't - use double word load/stores to insure that all loads are aligned. - While the destination and stores may still be unaligned, this - is only an issue for page (4096 byte boundary) crossing, which - should be rare for these short moves. The hardware handles this - case automatically with a small (~20 cycle) delay. */ - .align 4 - - cfi_same_value (31) - cfi_same_value (30) -L(word_unaligned_short): - mtcrf 0x01,5 - cmplwi cr6,5,8 - neg 8,4 - clrrwi 9,4,2 - andi. 0,8,3 - beq cr6,L(wus_8) /* Handle moves of 8 bytes. */ -/* At least 9 bytes left. Get the source word aligned. */ - cmpldi cr1,5,16 - mr 12,4 - ble cr6,L(wus_4) /* Handle moves of 0-8 bytes. */ - mr 11,3 - mr 10,5 - cmplwi cr6,0,2 - beq L(wus_tail) /* If the source is already word aligned skip this. */ -/* Copy 1-3 bytes to get source address word aligned. */ - lwz 6,0(9) - subf 10,0,5 - add 12,4,0 - blt cr6,5f - srdi 7,6,16 - bgt cr6,3f - sth 6,0(3) - b 7f - .align 4 -3: - stb 7,0(3) - sth 6,1(3) - b 7f - .align 4 -5: - stb 6,0(3) -7: - cmplwi cr1,10,16 - add 11,3,0 - mtcrf 0x01,10 - .align 4 -L(wus_tail): -/* At least 6 bytes left and the source is word aligned. This allows - some speculative loads up front. */ -/* We need to special case the fall-through because the biggest delays - are due to address computation not being ready in time for the - AGEN. */ - lwz 6,0(12) - lwz 7,4(12) - blt cr1,L(wus_tail8) - cmplwi cr0,10,24 -L(wus_tail16): /* Move 16 bytes. */ - stw 6,0(11) - stw 7,4(11) - lwz 6,8(12) - lwz 7,12(12) - stw 6,8(11) - stw 7,12(11) -/* Move 8 bytes more. */ - bf 28,L(wus_tail16p8) - cmplwi cr1,10,28 - lwz 6,16(12) - lwz 7,20(12) - stw 6,16(11) - stw 7,20(11) -/* Move 4 bytes more. */ - bf 29,L(wus_tail16p4) - lwz 6,24(12) - stw 6,24(11) - addi 12,12,28 - addi 11,11,28 - bgt cr1,L(wus_tail2) - /* exactly 28 bytes. Return original dst pointer and exit. */ - addi 1,1,32 - blr - .align 4 -L(wus_tail16p8): /* less then 8 bytes left. */ - beq cr1,L(wus_tailX) /* exactly 16 bytes, early exit. */ - cmplwi cr1,10,20 - bf 29,L(wus_tail16p2) -/* Move 4 bytes more. */ - lwz 6,16(12) - stw 6,16(11) - addi 12,12,20 - addi 11,11,20 - bgt cr1,L(wus_tail2) - /* exactly 20 bytes. Return original dst pointer and exit. */ - addi 1,1,32 - blr - .align 4 -L(wus_tail16p4): /* less then 4 bytes left. */ - addi 12,12,24 - addi 11,11,24 - bgt cr0,L(wus_tail2) - /* exactly 24 bytes. Return original dst pointer and exit. */ - addi 1,1,32 - blr - .align 4 -L(wus_tail16p2): /* 16 bytes moved, less then 4 bytes left. */ - addi 12,12,16 - addi 11,11,16 - b L(wus_tail2) - - .align 4 -L(wus_tail8): /* Move 8 bytes. */ -/* r6, r7 already loaded speculatively. */ - cmplwi cr1,10,8 - cmplwi cr0,10,12 - bf 28,L(wus_tail4) - stw 6,0(11) - stw 7,4(11) -/* Move 4 bytes more. */ - bf 29,L(wus_tail8p4) - lwz 6,8(12) - stw 6,8(11) - addi 12,12,12 - addi 11,11,12 - bgt cr0,L(wus_tail2) - /* exactly 12 bytes. Return original dst pointer and exit. */ - addi 1,1,32 - blr - .align 4 -L(wus_tail8p4): /* less then 4 bytes left. */ - addi 12,12,8 - addi 11,11,8 - bgt cr1,L(wus_tail2) - /* exactly 8 bytes. Return original dst pointer and exit. */ - addi 1,1,32 - blr - - .align 4 -L(wus_tail4): /* Move 4 bytes. */ -/* r6 already loaded speculatively. If we are here we know there is - more then 4 bytes left. So there is no need to test. */ - addi 12,12,4 - stw 6,0(11) - addi 11,11,4 -L(wus_tail2): /* Move 2-3 bytes. */ - bf 30,L(wus_tail1) - lhz 6,0(12) - sth 6,0(11) - bf 31,L(wus_tailX) - lbz 7,2(12) - stb 7,2(11) - addi 1,1,32 - blr -L(wus_tail1): /* Move 1 byte. */ - bf 31,L(wus_tailX) - lbz 6,0(12) - stb 6,0(11) -L(wus_tailX): - /* Return original dst pointer. */ - addi 1,1,32 - blr - -/* Special case to copy 0-8 bytes. */ - .align 4 -L(wus_8): - lwz 6,0(4) - lwz 7,4(4) - stw 6,0(3) - stw 7,4(3) - /* Return original dst pointer. */ - addi 1,1,32 - blr - .align 4 -L(wus_4): - bf 29,L(wus_2) - lwz 6,0(4) - stw 6,0(3) - bf 30,L(wus_5) - lhz 7,4(4) - sth 7,4(3) - bf 31,L(wus_0) - lbz 8,6(4) - stb 8,6(3) - addi 1,1,32 - blr - .align 4 -L(wus_5): - bf 31,L(wus_0) - lbz 6,4(4) - stb 6,4(3) - /* Return original dst pointer. */ - addi 1,1,32 - blr - .align 4 -L(wus_2): /* Move 2-3 bytes. */ - bf 30,L(wus_1) - lhz 6,0(4) - sth 6,0(3) - bf 31,L(wus_0) - lbz 7,2(4) - stb 7,2(3) - addi 1,1,32 - blr - .align 4 -L(wus_1): /* Move 1 byte. */ - bf 31,L(wus_0) - lbz 6,0(4) - stb 6,0(3) - .align 3 -L(wus_0): - /* Return original dst pointer. */ - addi 1,1,32 - blr - - .align 4 - cfi_offset(31,(24-32)) - cfi_offset(30,(20-32)) -L(wdu): - - /* Copy words where the destination is aligned but the source is - not. For power4, power5 and power6 machines there is penalty for - unaligned loads (src) that cross 32-byte, cacheline, or page - boundaries. So we want to use simple (unaligned) loads where - posible but avoid them where we know the load would span a 32-byte - boundary. - - At this point we know we have at least 29 (32-3) bytes to copy - the src is unaligned. and we may cross at least one 32-byte - boundary. Also we have the following regester values: - r3 == adjusted dst, word aligned - r4 == unadjusted src - r5 == unadjusted len - r9 == adjusted Word length - r10 == src alignment (1-3) - r12 == adjuested src, not aligned - r31 == adjusted len - - First we need to copy word upto but not crossing the next 32-byte - boundary. Then perform aligned loads just before and just after - the boundary and use shifts and or to gernerate the next aligned - word for dst. If more then 32 bytes remain we copy (unaligned src) - the next 7 words and repeat the loop until less then 32-bytes - remaim. - - Then if more then 4 bytes remain we again use aligned loads, - shifts and or to generate the next dst word. We then process the - remaining words using unaligned loads as needed. Finally we check - if there more then 0 bytes (1-3) bytes remainting and use - halfword and or byte load/stores to complete the copy. -*/ - mr 4,12 /* restore unaligned adjusted src ptr */ - clrlwi 0,12,27 /* Find dist from previous 32-byte boundary. */ - slwi 10,10,3 /* calculate number of bits to shift 1st word left */ - cmplwi cr5,0,16 - subfic 8,0,32 /* Number of bytes to next 32-byte boundary. */ - - mtcrf 0x01,8 - cmplwi cr1,10,16 - subfic 9,10,32 /* number of bits to shift 2nd word right */ -/* This test is reversed because the timing to compare the bytes to - 32-byte boundary could not be meet. So we compare the bytes from - previous 32-byte boundary and invert the test. */ - bge cr5,L(wdu_h32_8) - .align 4 - lwz 6,0(4) - lwz 7,4(4) - addi 12,4,16 /* generate alternate pointers to avoid agen */ - addi 11,3,16 /* timing issues downstream. */ - stw 6,0(3) - stw 7,4(3) - subi 31,31,16 - lwz 6,8(4) - lwz 7,12(4) - addi 4,4,16 - stw 6,8(3) - stw 7,12(3) - addi 3,3,16 - bf 28,L(wdu_h32_4) - lwz 6,0(12) - lwz 7,4(12) - subi 31,31,8 - addi 4,4,8 - stw 6,0(11) - stw 7,4(11) - addi 3,3,8 - bf 29,L(wdu_h32_0) - lwz 6,8(12) - addi 4,4,4 - subi 31,31,4 - stw 6,8(11) - addi 3,3,4 - b L(wdu_h32_0) - .align 4 -L(wdu_h32_8): - bf 28,L(wdu_h32_4) - lwz 6,0(4) - lwz 7,4(4) - subi 31,31,8 - bf 29,L(wdu_h32_8x) - stw 6,0(3) - stw 7,4(3) - lwz 6,8(4) - addi 4,4,12 - subi 31,31,4 - stw 6,8(3) - addi 3,3,12 - b L(wdu_h32_0) - .align 4 -L(wdu_h32_8x): - addi 4,4,8 - stw 6,0(3) - stw 7,4(3) - addi 3,3,8 - b L(wdu_h32_0) - .align 4 -L(wdu_h32_4): - bf 29,L(wdu_h32_0) - lwz 6,0(4) - subi 31,31,4 - addi 4,4,4 - stw 6,0(3) - addi 3,3,4 - .align 4 -L(wdu_h32_0): -/* set up for 32-byte boundry crossing word move and possibly 32-byte - move loop. */ - clrrwi 12,4,2 - cmplwi cr5,31,32 - bge cr1,L(wdu2_32) -#if 0 - b L(wdu1_32) -/* - cmplwi cr1,10,8 - beq cr1,L(wdu1_32) - cmplwi cr1,10,16 - beq cr1,L(wdu2_32) - cmplwi cr1,10,24 - beq cr1,L(wdu3_32) -*/ -L(wdu_32): - lwz 6,0(12) - cmplwi cr6,31,4 - srwi 8,31,5 /* calculate the 32 byte loop count */ - slw 0,6,10 - clrlwi 31,31,27 /* The remaining bytes, < 32. */ - blt cr5,L(wdu_32tail) - mtctr 8 - cmplwi cr6,31,4 - .align 4 -L(wdu_loop32): - /* copy 32 bytes at a time */ - lwz 8,4(12) - addi 12,12,32 - lwz 7,4(4) - srw 8,8,9 - or 0,0,8 - stw 0,0(3) - stw 7,4(3) - lwz 6,8(4) - lwz 7,12(4) - stw 6,8(3) - stw 7,12(3) - lwz 6,16(4) - lwz 7,20(4) - stw 6,16(3) - stw 7,20(3) - lwz 6,24(4) - lwz 7,28(4) - lwz 8,0(12) - addi 4,4,32 - stw 6,24(3) - stw 7,28(3) - addi 3,3,32 - slw 0,8,10 - bdnz+ L(wdu_loop32) - -L(wdu_32tail): - mtcrf 0x01,31 - cmplwi cr5,31,16 - blt cr6,L(wdu_4tail) - /* calculate and store the final word */ - lwz 8,4(12) - srw 8,8,9 - or 6,0,8 - b L(wdu_32tailx) -#endif - .align 4 -L(wdu1_32): - lwz 6,-1(4) - cmplwi cr6,31,4 - srwi 8,31,5 /* calculate the 32 byte loop count */ - slwi 6,6,8 - clrlwi 31,31,27 /* The remaining bytes, < 32. */ - blt cr5,L(wdu1_32tail) - mtctr 8 - cmplwi cr6,31,4 - - lwz 8,3(4) - lwz 7,4(4) -/* Equivalent to: srwi 8,8,32-8; or 6,6,8 */ - rlwimi 6,8,8,(32-8),31 - b L(wdu1_loop32x) - .align 4 -L(wdu1_loop32): - /* copy 32 bytes at a time */ - lwz 8,3(4) - lwz 7,4(4) - stw 10,-8(3) - stw 11,-4(3) -/* Equivalent to srwi 8,8,32-8; or 6,6,8 */ - rlwimi 6,8,8,(32-8),31 -L(wdu1_loop32x): - lwz 10,8(4) - lwz 11,12(4) - stw 6,0(3) - stw 7,4(3) - lwz 6,16(4) - lwz 7,20(4) - stw 10,8(3) - stw 11,12(3) - lwz 10,24(4) - lwz 11,28(4) - lwz 8,32-1(4) - addi 4,4,32 - stw 6,16(3) - stw 7,20(3) - addi 3,3,32 - slwi 6,8,8 - bdnz+ L(wdu1_loop32) - stw 10,-8(3) - stw 11,-4(3) - -L(wdu1_32tail): - mtcrf 0x01,31 - cmplwi cr5,31,16 - blt cr6,L(wdu_4tail) - /* calculate and store the final word */ - lwz 8,3(4) -/* Equivalent to: srwi 8,8,32-9; or 6,6,8 */ - rlwimi 6,8,8,(32-8),31 - b L(wdu_32tailx) - -L(wdu2_32): - bgt cr1,L(wdu3_32) - lwz 6,-2(4) - cmplwi cr6,31,4 - srwi 8,31,5 /* calculate the 32 byte loop count */ - slwi 6,6,16 - clrlwi 31,31,27 /* The remaining bytes, < 32. */ - blt cr5,L(wdu2_32tail) - mtctr 8 - cmplwi cr6,31,4 - - lwz 8,2(4) - lwz 7,4(4) -/* Equivalent to: srwi 8,8,32-8; or 6,6,8 */ - rlwimi 6,8,16,(32-16),31 - b L(wdu2_loop32x) - .align 4 -L(wdu2_loop32): - /* copy 32 bytes at a time */ - lwz 8,2(4) - lwz 7,4(4) - stw 10,-8(3) - stw 11,-4(3) -/* Equivalent to srwi 8,8,32-8; or 6,6,8 */ - rlwimi 6,8,16,(32-16),31 -L(wdu2_loop32x): - lwz 10,8(4) - lwz 11,12(4) - stw 6,0(3) - stw 7,4(3) - lwz 6,16(4) - lwz 7,20(4) - stw 10,8(3) - stw 11,12(3) - lwz 10,24(4) - lwz 11,28(4) -/* lwz 8,0(12) */ - lwz 8,32-2(4) - addi 4,4,32 - stw 6,16(3) - stw 7,20(3) - addi 3,3,32 - slwi 6,8,16 - bdnz+ L(wdu2_loop32) - stw 10,-8(3) - stw 11,-4(3) - -L(wdu2_32tail): - mtcrf 0x01,31 - cmplwi cr5,31,16 - blt cr6,L(wdu_4tail) - /* calculate and store the final word */ - lwz 8,2(4) -/* Equivalent to: srwi 8,8,32-9; or 6,6,8 */ - rlwimi 6,8,16,(32-16),31 - b L(wdu_32tailx) - -L(wdu3_32): -/* lwz 6,0(12) */ - lwz 6,-3(4) - cmplwi cr6,31,4 - srwi 8,31,5 /* calculate the 32 byte loop count */ - slwi 6,6,24 - clrlwi 31,31,27 /* The remaining bytes, < 32. */ - blt cr5,L(wdu3_32tail) - mtctr 8 - cmplwi cr6,31,4 - - lwz 8,1(4) - lwz 7,4(4) -/* Equivalent to: srwi 8,8,32-8; or 6,6,8 */ - rlwimi 6,8,24,(32-24),31 - b L(wdu3_loop32x) - .align 4 -L(wdu3_loop32): - /* copy 32 bytes at a time */ - lwz 8,1(4) - lwz 7,4(4) - stw 10,-8(3) - stw 11,-4(3) -/* Equivalent to srwi 8,8,32-8; or 6,6,8 */ - rlwimi 6,8,24,(32-24),31 -L(wdu3_loop32x): - lwz 10,8(4) - lwz 11,12(4) - stw 6,0(3) - stw 7,4(3) - lwz 6,16(4) - lwz 7,20(4) - stw 10,8(3) - stw 11,12(3) - lwz 10,24(4) - lwz 11,28(4) - lwz 8,32-3(4) - addi 4,4,32 - stw 6,16(3) - stw 7,20(3) - addi 3,3,32 - slwi 6,8,24 - bdnz+ L(wdu3_loop32) - stw 10,-8(3) - stw 11,-4(3) - -L(wdu3_32tail): - mtcrf 0x01,31 - cmplwi cr5,31,16 - blt cr6,L(wdu_4tail) - /* calculate and store the final word */ - lwz 8,1(4) -/* Equivalent to: srwi 8,8,32-9; or 6,6,8 */ - rlwimi 6,8,24,(32-24),31 - b L(wdu_32tailx) - .align 4 -L(wdu_32tailx): - blt cr5,L(wdu_t32_8) - lwz 7,4(4) - addi 12,4,16 /* generate alternate pointers to avoid agen */ - addi 11,3,16 /* timing issues downstream. */ - stw 6,0(3) - stw 7,4(3) - subi 31,31,16 - lwz 6,8(4) - lwz 7,12(4) - addi 4,4,16 - stw 6,8(3) - stw 7,12(3) - addi 3,3,16 - bf 28,L(wdu_t32_4x) - lwz 6,0(12) - lwz 7,4(12) - addi 4,4,8 - subi 31,31,8 - stw 6,0(11) - stw 7,4(11) - addi 3,3,8 - bf 29,L(wdu_t32_0) - lwz 6,8(12) - addi 4,4,4 - subi 31,31,4 - stw 6,8(11) - addi 3,3,4 - b L(wdu_t32_0) - .align 4 -L(wdu_t32_4x): - bf 29,L(wdu_t32_0) - lwz 6,0(4) - addi 4,4,4 - subi 31,31,4 - stw 6,0(3) - addi 3,3,4 - b L(wdu_t32_0) - .align 4 -L(wdu_t32_8): - bf 28,L(wdu_t32_4) - lwz 7,4(4) - subi 31,31,8 - bf 29,L(wdu_t32_8x) - stw 6,0(3) - stw 7,4(3) - lwz 6,8(4) - subi 31,31,4 - addi 4,4,12 - stw 6,8(3) - addi 3,3,12 - b L(wdu_t32_0) - .align 4 -L(wdu_t32_8x): - addi 4,4,8 - stw 6,0(3) - stw 7,4(3) - addi 3,3,8 - b L(wdu_t32_0) - .align 4 -L(wdu_t32_4): - subi 31,31,4 - stw 6,0(3) - addi 4,4,4 - addi 3,3,4 - .align 4 -L(wdu_t32_0): -L(wdu_4tail): - cmplwi cr6,31,0 - beq cr6,L(wdus_0) /* If the tail is 0 bytes we are done! */ - bf 30,L(wdus_3) - lhz 7,0(4) - sth 7,0(3) - bf 31,L(wdus_0) - lbz 8,2(4) - stb 8,2(3) - mr 3,30 - lwz 30,20(1) - lwz 31,24(1) - addi 1,1,32 - blr - .align 4 -L(wdus_3): - bf 31,L(wus_0) - lbz 6,0(4) - stb 6,0(3) - .align 4 -L(wdus_0): - /* Return original dst pointer. */ - mr 3,30 - lwz 30,20(1) - lwz 31,24(1) - addi 1,1,32 - blr -END (BP_SYM (memcpy)) - -libc_hidden_builtin_def (memcpy) |