diff options
Diffstat (limited to 'sysdeps/powerpc/powerpc32')
| -rw-r--r-- | sysdeps/powerpc/powerpc32/ppca2/memcpy.S | 511 |
1 files changed, 0 insertions, 511 deletions
diff --git a/sysdeps/powerpc/powerpc32/ppca2/memcpy.S b/sysdeps/powerpc/powerpc32/ppca2/memcpy.S deleted file mode 100644 index c6700f9f78..0000000000 --- a/sysdeps/powerpc/powerpc32/ppca2/memcpy.S +++ /dev/null @@ -1,511 +0,0 @@ -/* Optimized memcpy implementation for PowerPC A2. - Copyright (C) 2010 Free Software Foundation, Inc. - Contributed by Michael Brutman <brutman@us.ibm.com>. - 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., 59 Temple Place, Suite 330, Boston, MA - 02111-1307 USA. */ - -#include <sysdep.h> -#include <bp-sym.h> -#include <bp-asm.h> - -#define PREFETCH_AHEAD 4 /* no cache lines SRC prefetching ahead */ -#define ZERO_AHEAD 2 /* no cache lines DST zeroing ahead */ - - .machine ppca2 -EALIGN (BP_SYM (memcpy), 5, 0) - CALL_MCOUNT - - dcbt 0,r4 /* Prefetch ONE SRC cacheline */ - cmplwi cr1,r5,16 /* is size < 16 ? */ - mr r6,r3 /* Copy dest reg to r6; */ - blt+ cr1,L(shortcopy) - - - /* Big copy (16 bytes or more) - - Figure out how far to the nearest quadword boundary, or if we are - on one already. - - r3 - return value (always) - r4 - current source addr - r5 - copy length - r6 - current dest addr - */ - - neg r8,r3 /* LS 4 bits = # bytes to 8-byte dest bdry */ - clrlwi r8,r8,32-4 /* align to 16byte boundary */ - sub r7,r4,r3 /* compute offset to src from dest */ - cmplwi cr0,r8,0 /* Were we aligned on a 16 byte bdy? */ - beq+ L(dst_aligned) - - - - /* Destination is not aligned on quadword boundary. Get us to one. - - r3 - return value (always) - r4 - current source addr - r5 - copy length - r6 - current dest addr - r7 - offset to src from dest - r8 - number of bytes to quadword boundary - */ - - mtcrf 0x01,r8 /* put #bytes to boundary into cr7 */ - subf r5,r8,r5 /* adjust remaining len */ - - bf cr7*4+3,1f - lbzx r0,r7,r6 /* copy 1 byte addr */ - stb r0,0(r6) - addi r6,r6,1 -1: - bf cr7*4+2,2f - lhzx r0,r7,r6 /* copy 2 byte addr */ - sth r0,0(r6) - addi r6,r6,2 -2: - bf cr7*4+1,4f - lwzx r0,r7,r6 /* copy 4 byte addr */ - stw r0,0(r6) - addi r6,r6,4 -4: - bf cr7*4+0,8f - lfdx r0,r7,r6 /* copy 8 byte addr */ - stfd r0,0(r6) - addi r6,r6,8 -8: - add r4,r7,r6 /* update src addr */ - - - - /* Dest is quadword aligned now. - - Lots of decisions to make. If we are copying less than a cache - line we won't be here long. If we are not on a cache line - boundary we need to get there. And then we need to figure out - how many cache lines ahead to pre-touch. - - r3 - return value (always) - r4 - current source addr - r5 - copy length - r6 - current dest addr - */ - - - .align 4 -L(dst_aligned): - - -#ifdef SHARED - mflr r0 -/* Establishes GOT addressability so we can load __cache_line_size - from static. This value was set from the aux vector during startup. */ - bcl 20,31,1f -1: - mflr r9 - addis r9,r9,__cache_line_size-1b@ha - lwz r9,__cache_line_size-1b@l(r9) - mtlr r0 -#else -/* Load __cache_line_size from static. This value was set from the - aux vector during startup. */ - lis r9,__cache_line_size@ha - lwz r9,__cache_line_size@l(r9) -#endif - - cmplwi cr5, r9, 0 - bne+ cr5,L(cachelineset) - li r9,64 - - - -L(cachelineset): - - addi r10,r9,-1 - - cmpw cr5,r5,r10 /* Less than a cacheline to go? */ - - neg r7,r6 /* How far to next cacheline bdy? */ - - addi r6,r6,-8 /* prepare for stdu */ - cmpwi cr0,r9,128 - addi r4,r4,-8 /* prepare for ldu */ - - - ble+ cr5,L(lessthancacheline) - - beq- cr0,L(big_lines) /* 128 byte line code */ - - - - - /* More than a cacheline left to go, and using 64 byte cachelines */ - - clrlwi r7,r7,32-6 /* How far to next cacheline bdy? */ - - cmplwi cr6,r7,0 /* Are we on a cacheline bdy already? */ - - /* Reduce total len by what it takes to get to the next cache line */ - subf r5,r7,r5 - srwi r7,r7,4 /* How many qws to get to the line bdy? */ - - /* How many full cache lines to copy after getting to a line bdy? */ - srwi r10,r5,6 - - cmplwi r10,0 /* If no full cache lines to copy ... */ - li r11,0 /* number cachelines to copy with prefetch */ - beq L(nocacheprefetch) - - - /* We are here because we have at least one full cache line to copy, - and therefore some pre-touching to do. */ - - cmplwi r10,PREFETCH_AHEAD - li r12,64+8 /* prefetch distance */ - ble L(lessthanmaxprefetch) - - /* We can only do so much pre-fetching. R11 will have the count of - lines left to prefetch after the initial batch of prefetches - are executed. */ - - subi r11,r10,PREFETCH_AHEAD - li r10,PREFETCH_AHEAD - -L(lessthanmaxprefetch): - mtctr r10 - - /* At this point r10/ctr hold the number of lines to prefetch in this - initial batch, and r11 holds any remainder. */ - -L(prefetchSRC): - dcbt r12,r4 - addi r12,r12,64 - bdnz L(prefetchSRC) - - - /* Prefetching is done, or was not needed. - - cr6 - are we on a cacheline boundary already? - r7 - number of quadwords to the next cacheline boundary - */ - -L(nocacheprefetch): - mtctr r7 - - cmplwi cr1,r5,64 /* Less than a cache line to copy? */ - - /* How many bytes are left after we copy whatever full - cache lines we can get? */ - clrlwi r5,r5,32-6 - - beq cr6,L(cachelinealigned) - - - /* Copy quadwords up to the next cacheline boundary */ - -L(aligntocacheline): - lfd fp9,0x08(r4) - lfdu fp10,0x10(r4) - stfd fp9,0x08(r6) - stfdu fp10,0x10(r6) - bdnz L(aligntocacheline) - - - .align 4 -L(cachelinealigned): /* copy while cache lines */ - - blt- cr1,L(lessthancacheline) /* size <64 */ - -L(outerloop): - cmpwi r11,0 - mtctr r11 - beq- L(endloop) - - li r11,64*ZERO_AHEAD +8 /* DCBZ dist */ - - .align 4 - /* Copy whole cachelines, optimized by prefetching SRC cacheline */ -L(loop): /* Copy aligned body */ - dcbt r12,r4 /* PREFETCH SOURCE some cache lines ahead */ - lfd fp9, 0x08(r4) - dcbz r11,r6 - lfd fp10, 0x10(r4) - lfd fp11, 0x18(r4) - lfd fp12, 0x20(r4) - stfd fp9, 0x08(r6) - stfd fp10, 0x10(r6) - stfd fp11, 0x18(r6) - stfd fp12, 0x20(r6) - lfd fp9, 0x28(r4) - lfd fp10, 0x30(r4) - lfd fp11, 0x38(r4) - lfdu fp12, 0x40(r4) - stfd fp9, 0x28(r6) - stfd fp10, 0x30(r6) - stfd fp11, 0x38(r6) - stfdu fp12, 0x40(r6) - - bdnz L(loop) - - -L(endloop): - cmpwi r10,0 - beq- L(endloop2) - mtctr r10 - -L(loop2): /* Copy aligned body */ - lfd fp9, 0x08(r4) - lfd fp10, 0x10(r4) - lfd fp11, 0x18(r4) - lfd fp12, 0x20(r4) - stfd fp9, 0x08(r6) - stfd fp10, 0x10(r6) - stfd fp11, 0x18(r6) - stfd fp12, 0x20(r6) - lfd fp9, 0x28(r4) - lfd fp10, 0x30(r4) - lfd fp11, 0x38(r4) - lfdu fp12, 0x40(r4) - stfd fp9, 0x28(r6) - stfd fp10, 0x30(r6) - stfd fp11, 0x38(r6) - stfdu fp12, 0x40(r6) - - bdnz L(loop2) -L(endloop2): - - - .align 4 -L(lessthancacheline): /* Was there less than cache to do ? */ - cmplwi cr0,r5,16 - srwi r7,r5,4 /* divide size by 16 */ - blt- L(do_lt16) - mtctr r7 - -L(copy_remaining): - lfd fp9, 0x08(r4) - lfdu fp10, 0x10(r4) - stfd fp9, 0x08(r6) - stfdu fp10, 0x10(r6) - bdnz L(copy_remaining) - -L(do_lt16): /* less than 16 ? */ - cmplwi cr0,r5,0 /* copy remaining bytes (0-15) */ - beqlr+ /* no rest to copy */ - addi r4,r4,8 - addi r6,r6,8 - -L(shortcopy): /* SIMPLE COPY to handle size =< 15 bytes */ - mtcrf 0x01,r5 - sub r7,r4,r6 - bf- cr7*4+0,8f - lfdx fp9,r7,r6 /* copy 8 byte */ - stfd fp9,0(r6) - addi r6,r6,8 -8: - bf cr7*4+1,4f - lwzx r0,r7,r6 /* copy 4 byte */ - stw r0,0(r6) - addi r6,r6,4 -4: - bf cr7*4+2,2f - lhzx r0,r7,r6 /* copy 2 byte */ - sth r0,0(r6) - addi r6,r6,2 -2: - bf cr7*4+3,1f - lbzx r0,r7,r6 /* copy 1 byte */ - stb r0,0(r6) -1: - blr - - - - - - /* Similar to above, but for use with 128 byte lines. */ - - -L(big_lines): - - clrlwi r7,r7,32-7 /* How far to next cacheline bdy? */ - - cmplwi cr6,r7,0 /* Are we on a cacheline bdy already? */ - - /* Reduce total len by what it takes to get to the next cache line */ - subf r5,r7,r5 - srwi r7,r7,4 /* How many qw to get to the line bdy? */ - - /* How many full cache lines to copy after getting to a line bdy? */ - srwi r10,r5,7 - - cmplwi r10,0 /* If no full cache lines to copy ... */ - li r11,0 /* number cachelines to copy with prefetch */ - beq L(nocacheprefetch_128) - - - /* We are here because we have at least one full cache line to copy, - and therefore some pre-touching to do. */ - - cmplwi r10,PREFETCH_AHEAD - li r12,128+8 /* prefetch distance */ - ble L(lessthanmaxprefetch_128) - - /* We can only do so much pre-fetching. R11 will have the count of - lines left to prefetch after the initial batch of prefetches - are executed. */ - - subi r11,r10,PREFETCH_AHEAD - li r10,PREFETCH_AHEAD - -L(lessthanmaxprefetch_128): - mtctr r10 - - /* At this point r10/ctr hold the number of lines to prefetch in this - initial batch, and r11 holds any remainder. */ - -L(prefetchSRC_128): - dcbt r12,r4 - addi r12,r12,128 - bdnz L(prefetchSRC_128) - - - /* Prefetching is done, or was not needed. - - cr6 - are we on a cacheline boundary already? - r7 - number of quadwords to the next cacheline boundary - */ - -L(nocacheprefetch_128): - mtctr r7 - - cmplwi cr1,r5,128 /* Less than a cache line to copy? */ - - /* How many bytes are left after we copy whatever full - cache lines we can get? */ - clrlwi r5,r5,32-7 - - beq cr6,L(cachelinealigned_128) - - - /* Copy quadwords up to the next cacheline boundary */ - -L(aligntocacheline_128): - lfd fp9,0x08(r4) - lfdu fp10,0x10(r4) - stfd fp9,0x08(r6) - stfdu fp10,0x10(r6) - bdnz L(aligntocacheline_128) - - -L(cachelinealigned_128): /* copy while cache lines */ - - blt- cr1,L(lessthancacheline) /* size <128 */ - -L(outerloop_128): - cmpwi r11,0 - mtctr r11 - beq- L(endloop_128) - - li r11,128*ZERO_AHEAD +8 /* DCBZ dist */ - - .align 4 - /* Copy whole cachelines, optimized by prefetching SRC cacheline */ -L(loop_128): /* Copy aligned body */ - dcbt r12,r4 /* PREFETCH SOURCE some cache lines ahead */ - lfd fp9, 0x08(r4) - dcbz r11,r6 - lfd fp10, 0x10(r4) - lfd fp11, 0x18(r4) - lfd fp12, 0x20(r4) - stfd fp9, 0x08(r6) - stfd fp10, 0x10(r6) - stfd fp11, 0x18(r6) - stfd fp12, 0x20(r6) - lfd fp9, 0x28(r4) - lfd fp10, 0x30(r4) - lfd fp11, 0x38(r4) - lfd fp12, 0x40(r4) - stfd fp9, 0x28(r6) - stfd fp10, 0x30(r6) - stfd fp11, 0x38(r6) - stfd fp12, 0x40(r6) - lfd fp9, 0x48(r4) - lfd fp10, 0x50(r4) - lfd fp11, 0x58(r4) - lfd fp12, 0x60(r4) - stfd fp9, 0x48(r6) - stfd fp10, 0x50(r6) - stfd fp11, 0x58(r6) - stfd fp12, 0x60(r6) - lfd fp9, 0x68(r4) - lfd fp10, 0x70(r4) - lfd fp11, 0x78(r4) - lfdu fp12, 0x80(r4) - stfd fp9, 0x68(r6) - stfd fp10, 0x70(r6) - stfd fp11, 0x78(r6) - stfdu fp12, 0x80(r6) - - bdnz L(loop_128) - - -L(endloop_128): - cmpwi r10,0 - beq- L(endloop2_128) - mtctr r10 - -L(loop2_128): /* Copy aligned body */ - lfd fp9, 0x08(r4) - lfd fp10, 0x10(r4) - lfd fp11, 0x18(r4) - lfd fp12, 0x20(r4) - stfd fp9, 0x08(r6) - stfd fp10, 0x10(r6) - stfd fp11, 0x18(r6) - stfd fp12, 0x20(r6) - lfd fp9, 0x28(r4) - lfd fp10, 0x30(r4) - lfd fp11, 0x38(r4) - lfd fp12, 0x40(r4) - stfd fp9, 0x28(r6) - stfd fp10, 0x30(r6) - stfd fp11, 0x38(r6) - stfd fp12, 0x40(r6) - lfd fp9, 0x48(r4) - lfd fp10, 0x50(r4) - lfd fp11, 0x58(r4) - lfd fp12, 0x60(r4) - stfd fp9, 0x48(r6) - stfd fp10, 0x50(r6) - stfd fp11, 0x58(r6) - stfd fp12, 0x60(r6) - lfd fp9, 0x68(r4) - lfd fp10, 0x70(r4) - lfd fp11, 0x78(r4) - lfdu fp12, 0x80(r4) - stfd fp9, 0x68(r6) - stfd fp10, 0x70(r6) - stfd fp11, 0x78(r6) - stfdu fp12, 0x80(r6) - bdnz L(loop2_128) -L(endloop2_128): - - b L(lessthancacheline) - - -END (BP_SYM (memcpy)) -libc_hidden_builtin_def (memcpy) |