diff options
Diffstat (limited to 'sysdeps/powerpc/powerpc32/strcpy.S')
| -rw-r--r-- | sysdeps/powerpc/powerpc32/strcpy.S | 117 |
1 files changed, 0 insertions, 117 deletions
diff --git a/sysdeps/powerpc/powerpc32/strcpy.S b/sysdeps/powerpc/powerpc32/strcpy.S deleted file mode 100644 index c7af830dda..0000000000 --- a/sysdeps/powerpc/powerpc32/strcpy.S +++ /dev/null @@ -1,117 +0,0 @@ -/* Optimized strcpy implementation for PowerPC. - Copyright (C) 1997-2017 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, see - <http://www.gnu.org/licenses/>. */ - -#include <sysdep.h> - -/* See strlen.s for comments on how the end-of-string testing works. */ - -/* char * [r3] strcpy (char *dest [r3], const char *src [r4]) */ - -EALIGN (strcpy, 4, 0) - -#define rTMP r0 -#define rRTN r3 /* incoming DEST arg preserved as result */ -#define rSRC r4 /* pointer to previous word in src */ -#define rDEST r5 /* pointer to previous word in dest */ -#define rWORD r6 /* current word from src */ -#define rFEFE r7 /* constant 0xfefefeff (-0x01010101) */ -#define r7F7F r8 /* constant 0x7f7f7f7f */ -#define rNEG r9 /* ~(word in s1 | 0x7f7f7f7f) */ -#define rALT r10 /* alternate word from src */ - - - or rTMP, rSRC, rRTN - clrlwi. rTMP, rTMP, 30 - addi rDEST, rRTN, -4 - bne L(unaligned) - - lis rFEFE, -0x101 - lis r7F7F, 0x7f7f - lwz rWORD, 0(rSRC) - addi rFEFE, rFEFE, -0x101 - addi r7F7F, r7F7F, 0x7f7f - b L(g2) - -L(g0): lwzu rALT, 4(rSRC) - stwu rWORD, 4(rDEST) - add rTMP, rFEFE, rALT - nor rNEG, r7F7F, rALT - and. rTMP, rTMP, rNEG - bne- L(g1) - lwzu rWORD, 4(rSRC) - stwu rALT, 4(rDEST) -L(g2): add rTMP, rFEFE, rWORD - nor rNEG, r7F7F, rWORD - and. rTMP, rTMP, rNEG - beq+ L(g0) - - mr rALT, rWORD -/* We've hit the end of the string. Do the rest byte-by-byte. */ -L(g1): -#ifdef __LITTLE_ENDIAN__ - rlwinm. rTMP, rALT, 0, 24, 31 - stb rALT, 4(rDEST) - beqlr- - rlwinm. rTMP, rALT, 24, 24, 31 - stb rTMP, 5(rDEST) - beqlr- - rlwinm. rTMP, rALT, 16, 24, 31 - stb rTMP, 6(rDEST) - beqlr- - rlwinm rTMP, rALT, 8, 24, 31 - stb rTMP, 7(rDEST) - blr -#else - rlwinm. rTMP, rALT, 8, 24, 31 - stb rTMP, 4(rDEST) - beqlr- - rlwinm. rTMP, rALT, 16, 24, 31 - stb rTMP, 5(rDEST) - beqlr- - rlwinm. rTMP, rALT, 24, 24, 31 - stb rTMP, 6(rDEST) - beqlr- - stb rALT, 7(rDEST) - blr -#endif - -/* Oh well. In this case, we just do a byte-by-byte copy. */ - .align 4 - nop -L(unaligned): - lbz rWORD, 0(rSRC) - addi rDEST, rRTN, -1 - cmpwi rWORD, 0 - beq- L(u2) - -L(u0): lbzu rALT, 1(rSRC) - stbu rWORD, 1(rDEST) - cmpwi rALT, 0 - beq- L(u1) - nop /* Let 601 load start of loop. */ - lbzu rWORD, 1(rSRC) - stbu rALT, 1(rDEST) - cmpwi rWORD, 0 - bne+ L(u0) -L(u2): stb rWORD, 1(rDEST) - blr -L(u1): stb rALT, 1(rDEST) - blr - -END (strcpy) -libc_hidden_builtin_def (strcpy) |