diff options
| -rw-r--r-- | sysdeps/powerpc/powerpc32/power4/multiarch/Makefile | 2 | ||||
| -rw-r--r-- | sysdeps/powerpc/powerpc32/power4/multiarch/ifunc-impl-list.c | 7 | ||||
| -rw-r--r-- | sysdeps/powerpc/powerpc32/power4/multiarch/strncmp-power7.S | 38 | ||||
| -rw-r--r-- | sysdeps/powerpc/powerpc32/power4/multiarch/strncmp-ppc32.S | 40 | ||||
| -rw-r--r-- | sysdeps/powerpc/powerpc32/power4/multiarch/strncmp.c | 39 | ||||
| -rw-r--r-- | sysdeps/powerpc/powerpc32/power4/strncmp.S | 196 | ||||
| -rw-r--r-- | sysdeps/powerpc/powerpc32/power7/strncmp.S | 199 | ||||
| -rw-r--r-- | sysdeps/powerpc/powerpc32/strncmp.S | 181 |
8 files changed, 1 insertions, 701 deletions
diff --git a/sysdeps/powerpc/powerpc32/power4/multiarch/Makefile b/sysdeps/powerpc/powerpc32/power4/multiarch/Makefile index b2f9deefb8..0a4e828435 100644 --- a/sysdeps/powerpc/powerpc32/power4/multiarch/Makefile +++ b/sysdeps/powerpc/powerpc32/power4/multiarch/Makefile @@ -5,7 +5,7 @@ sysdep_routines += memcpy-power7 memcpy-a2 memcpy-power6 memcpy-cell \ mempcpy-power7 mempcpy-ppc32 memchr-power7 \ memchr-ppc32 memrchr-power7 memrchr-ppc32 rawmemchr-power7 \ rawmemchr-ppc32 strlen-power7 strlen-ppc32 strnlen-power7 \ - strnlen-ppc32 strncmp-power7 strncmp-ppc32 \ + strnlen-ppc32 \ strcasecmp-power7 strcasecmp_l-power7 strncase-power7 \ strncase_l-power7 strchrnul-power7 strchrnul-ppc32 \ strchr-power7 strchr-ppc32 \ diff --git a/sysdeps/powerpc/powerpc32/power4/multiarch/ifunc-impl-list.c b/sysdeps/powerpc/powerpc32/power4/multiarch/ifunc-impl-list.c index 3b95ad2c12..b4f80539e7 100644 --- a/sysdeps/powerpc/powerpc32/power4/multiarch/ifunc-impl-list.c +++ b/sysdeps/powerpc/powerpc32/power4/multiarch/ifunc-impl-list.c @@ -81,13 +81,6 @@ __libc_ifunc_impl_list (const char *name, struct libc_ifunc_impl *array, __strnlen_power7) IFUNC_IMPL_ADD (array, i, strnlen, 1, __strnlen_ppc)) - - /* Support sysdeps/powerpc/powerpc32/multiarch/strncmp.c. */ - IFUNC_IMPL (i, name, strncmp, - IFUNC_IMPL_ADD (array, i, strncmp, hwcap & PPC_FEATURE_HAS_VSX, - __strncmp_power7) - IFUNC_IMPL_ADD (array, i, strncmp, 1, - __strncmp_ppc)) #endif /* Support sysdeps/powerpc/powerpc32/power4/multiarch/memcmp.c. */ diff --git a/sysdeps/powerpc/powerpc32/power4/multiarch/strncmp-power7.S b/sysdeps/powerpc/powerpc32/power4/multiarch/strncmp-power7.S deleted file mode 100644 index 068b1bb8ad..0000000000 --- a/sysdeps/powerpc/powerpc32/power4/multiarch/strncmp-power7.S +++ /dev/null @@ -1,38 +0,0 @@ -/* Optimized strcmp implementation for POWER7/PowerPC32. - Copyright (C) 2013-2023 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 - <https://www.gnu.org/licenses/>. */ - -#include <sysdep.h> - -#undef EALIGN -#define EALIGN(name, alignt, words) \ - .globl C_SYMBOL_NAME(__strncmp_power7); \ - .type C_SYMBOL_NAME(__strncmp_power7),@function; \ - .align ALIGNARG(alignt); \ - EALIGN_W_##words; \ - C_LABEL(__strncmp_power7) \ - cfi_startproc; - -#undef END -#define END(name) \ - cfi_endproc; \ - ASM_SIZE_DIRECTIVE(__strncmp_power7) - -#undef libc_hidden_builtin_def -#define libc_hidden_builtin_def(name) - -#include <sysdeps/powerpc/powerpc32/power7/strncmp.S> diff --git a/sysdeps/powerpc/powerpc32/power4/multiarch/strncmp-ppc32.S b/sysdeps/powerpc/powerpc32/power4/multiarch/strncmp-ppc32.S deleted file mode 100644 index b04afd4478..0000000000 --- a/sysdeps/powerpc/powerpc32/power4/multiarch/strncmp-ppc32.S +++ /dev/null @@ -1,40 +0,0 @@ -/* Copyright (C) 2013-2023 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 - <https://www.gnu.org/licenses/>. */ - -#include <sysdep.h> - -#if defined SHARED && IS_IN (libc) -# undef EALIGN -# define EALIGN(name, alignt, words) \ - .globl C_SYMBOL_NAME(__strncmp_ppc); \ - .type C_SYMBOL_NAME(__strncmp_ppc),@function; \ - .align ALIGNARG(alignt); \ - EALIGN_W_##words; \ - C_LABEL(__strncmp_ppc) \ - cfi_startproc; - -# undef END -# define END(name) \ - cfi_endproc; \ - ASM_SIZE_DIRECTIVE(__strncmp_ppc) - -# undef libc_hidden_builtin_def -# define libc_hidden_builtin_def(name) \ - .globl __GI_strncmp; __GI_strncmp = __strncmp_ppc -#endif - -#include <sysdeps/powerpc/powerpc32/power4/strncmp.S> diff --git a/sysdeps/powerpc/powerpc32/power4/multiarch/strncmp.c b/sysdeps/powerpc/powerpc32/power4/multiarch/strncmp.c deleted file mode 100644 index 79046015e5..0000000000 --- a/sysdeps/powerpc/powerpc32/power4/multiarch/strncmp.c +++ /dev/null @@ -1,39 +0,0 @@ -/* Multiple versions of strncmp. - Copyright (C) 2013-2023 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 - <https://www.gnu.org/licenses/>. */ - -/* Define multiple versions only for definition in libc. */ -#if defined SHARED && IS_IN (libc) -# define strncmp __redirect_strncmp -/* Omit the strncmp inline definitions because it would redefine strncmp. */ -# define __NO_STRING_INLINES -# include <string.h> -# include <shlib-compat.h> -# include "init-arch.h" - -extern __typeof (strncmp) __strncmp_ppc attribute_hidden; -extern __typeof (strncmp) __strncmp_power4 attribute_hidden; -extern __typeof (strncmp) __strncmp_power7 attribute_hidden; -# undef strncmp - -/* Avoid DWARF definition DIE on ifunc symbol so that GDB can handle - ifunc symbol properly. */ -libc_ifunc_redirected (__redirect_strncmp, strncmp, - (hwcap & PPC_FEATURE_HAS_VSX) - ? __strncmp_power7 - : __strncmp_ppc); -#endif diff --git a/sysdeps/powerpc/powerpc32/power4/strncmp.S b/sysdeps/powerpc/powerpc32/power4/strncmp.S deleted file mode 100644 index 1f65c947cd..0000000000 --- a/sysdeps/powerpc/powerpc32/power4/strncmp.S +++ /dev/null @@ -1,196 +0,0 @@ -/* Optimized strcmp implementation for PowerPC32. - Copyright (C) 2003-2023 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 - <https://www.gnu.org/licenses/>. */ - -#include <sysdep.h> - -/* See strlen.s for comments on how the end-of-string testing works. */ - -/* int [r3] strncmp (const char *s1 [r3], const char *s2 [r4], size_t size [r5]) */ - -EALIGN (strncmp, 4, 0) - -#define rTMP2 r0 -#define rRTN r3 -#define rSTR1 r3 /* first string arg */ -#define rSTR2 r4 /* second string arg */ -#define rN r5 /* max string length */ -#define rWORD1 r6 /* current word in s1 */ -#define rWORD2 r7 /* current word in s2 */ -#define rWORD3 r10 -#define rWORD4 r11 -#define rFEFE r8 /* constant 0xfefefeff (-0x01010101) */ -#define r7F7F r9 /* constant 0x7f7f7f7f */ -#define rNEG r10 /* ~(word in s1 | 0x7f7f7f7f) */ -#define rBITDIF r11 /* bits that differ in s1 & s2 words */ -#define rTMP r12 - - dcbt 0,rSTR1 - or rTMP, rSTR2, rSTR1 - lis r7F7F, 0x7f7f - dcbt 0,rSTR2 - clrlwi. rTMP, rTMP, 30 - cmplwi cr1, rN, 0 - lis rFEFE, -0x101 - bne L(unaligned) -/* We are word aligned so set up for two loops. first a word - loop, then fall into the byte loop if any residual. */ - srwi. rTMP, rN, 2 - clrlwi rN, rN, 30 - addi rFEFE, rFEFE, -0x101 - addi r7F7F, r7F7F, 0x7f7f - cmplwi cr1, rN, 0 - beq L(unaligned) - - mtctr rTMP /* Power4 wants mtctr 1st in dispatch group. */ - lwz rWORD1, 0(rSTR1) - lwz rWORD2, 0(rSTR2) - b L(g1) - -L(g0): - lwzu rWORD1, 4(rSTR1) - bne- cr1, L(different) - lwzu rWORD2, 4(rSTR2) -L(g1): add rTMP, rFEFE, rWORD1 - nor rNEG, r7F7F, rWORD1 - bdz L(tail) - and. rTMP, rTMP, rNEG - cmpw cr1, rWORD1, rWORD2 - beq+ L(g0) - -/* OK. We've hit the end of the string. We need to be careful that - we don't compare two strings as different because of gunk beyond - the end of the strings... */ - -#ifdef __LITTLE_ENDIAN__ -L(endstring): - slwi rTMP, rTMP, 1 - addi rTMP2, rTMP, -1 - andc rTMP2, rTMP2, rTMP - and rWORD2, rWORD2, rTMP2 /* Mask off gunk. */ - and rWORD1, rWORD1, rTMP2 - rlwinm rTMP2, rWORD2, 8, 0xffffffff /* Byte reverse word. */ - rlwinm rTMP, rWORD1, 8, 0xffffffff - rldimi rTMP2, rWORD2, 24, 32 - rldimi rTMP, rWORD1, 24, 32 - rlwimi rTMP2, rWORD2, 24, 16, 23 - rlwimi rTMP, rWORD1, 24, 16, 23 - xor. rBITDIF, rTMP, rTMP2 - sub rRTN, rTMP, rTMP2 - bgelr+ - ori rRTN, rTMP2, 1 - blr - -L(different): - lwz rWORD1, -4(rSTR1) - rlwinm rTMP2, rWORD2, 8, 0xffffffff /* Byte reverse word. */ - rlwinm rTMP, rWORD1, 8, 0xffffffff - rldimi rTMP2, rWORD2, 24, 32 - rldimi rTMP, rWORD1, 24, 32 - rlwimi rTMP2, rWORD2, 24, 16, 23 - rlwimi rTMP, rWORD1, 24, 16, 23 - xor. rBITDIF, rTMP, rTMP2 - sub rRTN, rTMP, rTMP2 - bgelr+ - ori rRTN, rTMP2, 1 - blr - -#else -L(endstring): - and rTMP, r7F7F, rWORD1 - beq cr1, L(equal) - add rTMP, rTMP, r7F7F - xor. rBITDIF, rWORD1, rWORD2 - andc rNEG, rNEG, rTMP - blt- L(highbit) - cntlzw rBITDIF, rBITDIF - cntlzw rNEG, rNEG - addi rNEG, rNEG, 7 - cmpw cr1, rNEG, rBITDIF - sub rRTN, rWORD1, rWORD2 - bgelr+ cr1 -L(equal): - li rRTN, 0 - blr - -L(different): - lwz rWORD1, -4(rSTR1) - xor. rBITDIF, rWORD1, rWORD2 - sub rRTN, rWORD1, rWORD2 - bgelr+ -L(highbit): - ori rRTN, rWORD2, 1 - blr -#endif - -/* Oh well. In this case, we just do a byte-by-byte comparison. */ - .align 4 -L(tail): - and. rTMP, rTMP, rNEG - cmpw cr1, rWORD1, rWORD2 - bne- L(endstring) - addi rSTR1, rSTR1, 4 - bne- cr1, L(different) - addi rSTR2, rSTR2, 4 - cmplwi cr1, rN, 0 -L(unaligned): - mtctr rN /* Power4 wants mtctr 1st in dispatch group */ - ble cr1, L(ux) -L(uz): - lbz rWORD1, 0(rSTR1) - lbz rWORD2, 0(rSTR2) - .align 4 -L(u1): - cmpwi cr1, rWORD1, 0 - bdz L(u4) - cmpw rWORD1, rWORD2 - beq- cr1, L(u4) - bne- L(u4) - lbzu rWORD3, 1(rSTR1) - lbzu rWORD4, 1(rSTR2) - cmpwi cr1, rWORD3, 0 - bdz L(u3) - cmpw rWORD3, rWORD4 - beq- cr1, L(u3) - bne- L(u3) - lbzu rWORD1, 1(rSTR1) - lbzu rWORD2, 1(rSTR2) - cmpwi cr1, rWORD1, 0 - bdz L(u4) - cmpw rWORD1, rWORD2 - beq- cr1, L(u4) - bne- L(u4) - lbzu rWORD3, 1(rSTR1) - lbzu rWORD4, 1(rSTR2) - cmpwi cr1, rWORD3, 0 - bdz L(u3) - cmpw rWORD3, rWORD4 - beq- cr1, L(u3) - bne- L(u3) - lbzu rWORD1, 1(rSTR1) - lbzu rWORD2, 1(rSTR2) - b L(u1) - -L(u3): sub rRTN, rWORD3, rWORD4 - blr -L(u4): sub rRTN, rWORD1, rWORD2 - blr -L(ux): - li rRTN, 0 - blr -END (strncmp) -libc_hidden_builtin_def (strncmp) diff --git a/sysdeps/powerpc/powerpc32/power7/strncmp.S b/sysdeps/powerpc/powerpc32/power7/strncmp.S deleted file mode 100644 index bbaab6ca0e..0000000000 --- a/sysdeps/powerpc/powerpc32/power7/strncmp.S +++ /dev/null @@ -1,199 +0,0 @@ -/* Optimized strcmp implementation for POWER7/PowerPC32. - Copyright (C) 2010-2023 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 - <https://www.gnu.org/licenses/>. */ - -#include <sysdep.h> - -/* See strlen.s for comments on how the end-of-string testing works. */ - -/* int [r3] strncmp (const char *s1 [r3], - const char *s2 [r4], - size_t size [r5]) */ - -EALIGN (strncmp,5,0) - -#define rTMP2 r0 -#define rRTN r3 -#define rSTR1 r3 /* first string arg */ -#define rSTR2 r4 /* second string arg */ -#define rN r5 /* max string length */ -#define rWORD1 r6 /* current word in s1 */ -#define rWORD2 r7 /* current word in s2 */ -#define rWORD3 r10 -#define rWORD4 r11 -#define rFEFE r8 /* constant 0xfefefeff (-0x01010101) */ -#define r7F7F r9 /* constant 0x7f7f7f7f */ -#define rNEG r10 /* ~(word in s1 | 0x7f7f7f7f) */ -#define rBITDIF r11 /* bits that differ in s1 & s2 words */ -#define rTMP r12 - - dcbt 0,rSTR1 - nop - or rTMP,rSTR2,rSTR1 - lis r7F7F,0x7f7f - dcbt 0,rSTR2 - nop - clrlwi. rTMP,rTMP,30 - cmplwi cr1,rN,0 - lis rFEFE,-0x101 - bne L(unaligned) -/* We are word aligned so set up for two loops. first a word - loop, then fall into the byte loop if any residual. */ - srwi. rTMP,rN,2 - clrlwi rN,rN,30 - addi rFEFE,rFEFE,-0x101 - addi r7F7F,r7F7F,0x7f7f - cmplwi cr1,rN,0 - beq L(unaligned) - - mtctr rTMP - lwz rWORD1,0(rSTR1) - lwz rWORD2,0(rSTR2) - b L(g1) - -L(g0): - lwzu rWORD1,4(rSTR1) - bne cr1,L(different) - lwzu rWORD2,4(rSTR2) -L(g1): add rTMP,rFEFE,rWORD1 - nor rNEG,r7F7F,rWORD1 - bdz L(tail) - and. rTMP,rTMP,rNEG - cmpw cr1,rWORD1,rWORD2 - beq L(g0) - -/* OK. We've hit the end of the string. We need to be careful that - we don't compare two strings as different because of gunk beyond - the end of the strings... */ -#ifdef __LITTLE_ENDIAN__ -L(endstring): - slwi rTMP, rTMP, 1 - addi rTMP2, rTMP, -1 - andc rTMP2, rTMP2, rTMP - and rWORD2, rWORD2, rTMP2 /* Mask off gunk. */ - and rWORD1, rWORD1, rTMP2 - rlwinm rTMP2, rWORD2, 8, 0xffffffff /* Byte reverse word. */ - rlwinm rTMP, rWORD1, 8, 0xffffffff - rldimi rTMP2, rWORD2, 24, 32 - rldimi rTMP, rWORD1, 24, 32 - rlwimi rTMP2, rWORD2, 24, 16, 23 - rlwimi rTMP, rWORD1, 24, 16, 23 - xor. rBITDIF, rTMP, rTMP2 - sub rRTN, rTMP, rTMP2 - bgelr - ori rRTN, rTMP2, 1 - blr - -L(different): - lwz rWORD1, -4(rSTR1) - rlwinm rTMP2, rWORD2, 8, 0xffffffff /* Byte reverse word. */ - rlwinm rTMP, rWORD1, 8, 0xffffffff - rldimi rTMP2, rWORD2, 24, 32 - rldimi rTMP, rWORD1, 24, 32 - rlwimi rTMP2, rWORD2, 24, 16, 23 - rlwimi rTMP, rWORD1, 24, 16, 23 - xor. rBITDIF, rTMP, rTMP2 - sub rRTN, rTMP, rTMP2 - bgelr - ori rRTN, rTMP2, 1 - blr - -#else -L(endstring): - and rTMP,r7F7F,rWORD1 - beq cr1,L(equal) - add rTMP,rTMP,r7F7F - xor. rBITDIF,rWORD1,rWORD2 - andc rNEG,rNEG,rTMP - blt L(highbit) - cntlzw rBITDIF,rBITDIF - cntlzw rNEG,rNEG - addi rNEG,rNEG,7 - cmpw cr1,rNEG,rBITDIF - sub rRTN,rWORD1,rWORD2 - bgelr cr1 -L(equal): - li rRTN,0 - blr - -L(different): - lwz rWORD1,-4(rSTR1) - xor. rBITDIF,rWORD1,rWORD2 - sub rRTN,rWORD1,rWORD2 - bgelr -L(highbit): - ori rRTN, rWORD2, 1 - blr -#endif - -/* Oh well. In this case, we just do a byte-by-byte comparison. */ - .align 4 -L(tail): - and. rTMP,rTMP,rNEG - cmpw cr1,rWORD1,rWORD2 - bne L(endstring) - addi rSTR1,rSTR1,4 - bne cr1,L(different) - addi rSTR2,rSTR2,4 - cmplwi cr1,rN,0 -L(unaligned): - mtctr rN - ble cr1,L(ux) -L(uz): - lbz rWORD1,0(rSTR1) - lbz rWORD2,0(rSTR2) - .align 4 -L(u1): - cmpwi cr1,rWORD1,0 - bdz L(u4) - cmpw rWORD1,rWORD2 - beq cr1,L(u4) - bne L(u4) - lbzu rWORD3,1(rSTR1) - lbzu rWORD4,1(rSTR2) - cmpwi cr1,rWORD3,0 - bdz L(u3) - cmpw rWORD3,rWORD4 - beq cr1,L(u3) - bne L(u3) - lbzu rWORD1,1(rSTR1) - lbzu rWORD2,1(rSTR2) - cmpwi cr1,rWORD1,0 - bdz L(u4) - cmpw rWORD1,rWORD2 - beq cr1,L(u4) - bne L(u4) - lbzu rWORD3,1(rSTR1) - lbzu rWORD4,1(rSTR2) - cmpwi cr1,rWORD3,0 - bdz L(u3) - cmpw rWORD3,rWORD4 - beq cr1,L(u3) - bne L(u3) - lbzu rWORD1,1(rSTR1) - lbzu rWORD2,1(rSTR2) - b L(u1) - -L(u3): sub rRTN,rWORD3,rWORD4 - blr -L(u4): sub rRTN,rWORD1,rWORD2 - blr -L(ux): - li rRTN,0 - blr -END (strncmp) -libc_hidden_builtin_def (strncmp) diff --git a/sysdeps/powerpc/powerpc32/strncmp.S b/sysdeps/powerpc/powerpc32/strncmp.S deleted file mode 100644 index 28cae4ddce..0000000000 --- a/sysdeps/powerpc/powerpc32/strncmp.S +++ /dev/null @@ -1,181 +0,0 @@ -/* Optimized strcmp implementation for PowerPC32. - Copyright (C) 2003-2023 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 - <https://www.gnu.org/licenses/>. */ - -#include <sysdep.h> - -/* See strlen.s for comments on how the end-of-string testing works. */ - -/* int [r3] strncmp (const char *s1 [r3], const char *s2 [r4], size_t size [r5]) */ - -EALIGN (strncmp, 4, 0) - -#define rTMP2 r0 -#define rRTN r3 -#define rSTR1 r3 /* first string arg */ -#define rSTR2 r4 /* second string arg */ -#define rN r5 /* max string length */ -#define rWORD1 r6 /* current word in s1 */ -#define rWORD2 r7 /* current word in s2 */ -#define rFEFE r8 /* constant 0xfefefeff (-0x01010101) */ -#define r7F7F r9 /* constant 0x7f7f7f7f */ -#define rNEG r10 /* ~(word in s1 | 0x7f7f7f7f) */ -#define rBITDIF r11 /* bits that differ in s1 & s2 words */ -#define rTMP r12 - - dcbt 0,rSTR1 - or rTMP, rSTR2, rSTR1 - lis r7F7F, 0x7f7f - dcbt 0,rSTR2 - clrlwi. rTMP, rTMP, 30 - cmplwi cr1, rN, 0 - lis rFEFE, -0x101 - bne L(unaligned) -/* We are word aligned so set up for two loops. first a word - loop, then fall into the byte loop if any residual. */ - srwi. rTMP, rN, 2 - clrlwi rN, rN, 30 - addi rFEFE, rFEFE, -0x101 - addi r7F7F, r7F7F, 0x7f7f - cmplwi cr1, rN, 0 - beq L(unaligned) - - mtctr rTMP /* Power4 wants mtctr 1st in dispatch group. */ - lwz rWORD1, 0(rSTR1) - lwz rWORD2, 0(rSTR2) - b L(g1) - -L(g0): - lwzu rWORD1, 4(rSTR1) - bne- cr1, L(different) - lwzu rWORD2, 4(rSTR2) -L(g1): add rTMP, rFEFE, rWORD1 - nor rNEG, r7F7F, rWORD1 - bdz L(tail) - and. rTMP, rTMP, rNEG - cmpw cr1, rWORD1, rWORD2 - beq+ L(g0) - -/* OK. We've hit the end of the string. We need to be careful that - we don't compare two strings as different because of gunk beyond - the end of the strings... */ - -#ifdef __LITTLE_ENDIAN__ -L(endstring): - slwi rTMP, rTMP, 1 - addi rTMP2, rTMP, -1 - andc rTMP2, rTMP2, rTMP - and rWORD2, rWORD2, rTMP2 /* Mask off gunk. */ - and rWORD1, rWORD1, rTMP2 - rlwinm rTMP2, rWORD2, 8, 0xffffffff /* Byte reverse word. */ - rlwinm rTMP, rWORD1, 8, 0xffffffff - rlwimi rTMP2, rWORD2, 24, 0, 7 - rlwimi rTMP, rWORD1, 24, 0, 7 - rlwimi rTMP2, rWORD2, 24, 16, 23 - rlwimi rTMP, rWORD1, 24, 16, 23 - xor. rBITDIF, rTMP, rTMP2 - sub rRTN, rTMP, rTMP2 - bgelr+ - ori rRTN, rTMP2, 1 - blr - -L(different): - lwz rWORD1, -4(rSTR1) - rlwinm rTMP2, rWORD2, 8, 0xffffffff /* Byte reverse word. */ - rlwinm rTMP, rWORD1, 8, 0xffffffff - rlwimi rTMP2, rWORD2, 24, 0, 7 - rlwimi rTMP, rWORD1, 24, 0, 7 - rlwimi rTMP2, rWORD2, 24, 16, 23 - rlwimi rTMP, rWORD1, 24, 16, 23 - xor. rBITDIF, rTMP, rTMP2 - sub rRTN, rTMP, rTMP2 - bgelr+ - ori rRTN, rTMP2, 1 - blr - -#else -L(endstring): - and rTMP, r7F7F, rWORD1 - beq cr1, L(equal) - add rTMP, rTMP, r7F7F - xor. rBITDIF, rWORD1, rWORD2 - andc rNEG, rNEG, rTMP - blt- L(highbit) - cntlzw rBITDIF, rBITDIF - cntlzw rNEG, rNEG - addi rNEG, rNEG, 7 - cmpw cr1, rNEG, rBITDIF - sub rRTN, rWORD1, rWORD2 - bgelr+ cr1 -L(equal): - li rRTN, 0 - blr - -L(different): - lwz rWORD1, -4(rSTR1) - xor. rBITDIF, rWORD1, rWORD2 - sub rRTN, rWORD1, rWORD2 - bgelr+ -L(highbit): - ori rRTN, rWORD2, 1 - blr -#endif - -/* Oh well. In this case, we just do a byte-by-byte comparison. */ - .align 4 -L(tail): - and. rTMP, rTMP, rNEG - cmpw cr1, rWORD1, rWORD2 - bne- L(endstring) - addi rSTR1, rSTR1, 4 - bne- cr1, L(different) - addi rSTR2, rSTR2, 4 - cmplwi cr1, rN, 0 -L(unaligned): - mtctr rN /* Power4 wants mtctr 1st in dispatch group */ - bgt cr1, L(uz) -L(ux): - li rRTN, 0 - blr - .align 4 -L(uz): - lbz rWORD1, 0(rSTR1) - lbz rWORD2, 0(rSTR2) - nop - b L(u1) -L(u0): - lbzu rWORD2, 1(rSTR2) -L(u1): - bdz L(u3) - cmpwi cr1, rWORD1, 0 - cmpw rWORD1, rWORD2 - beq- cr1, L(u3) - lbzu rWORD1, 1(rSTR1) - bne- L(u2) - lbzu rWORD2, 1(rSTR2) - bdz L(u3) - cmpwi cr1, rWORD1, 0 - cmpw rWORD1, rWORD2 - bne- L(u3) - lbzu rWORD1, 1(rSTR1) - bne+ cr1, L(u0) - -L(u2): lbzu rWORD1, -1(rSTR1) -L(u3): sub rRTN, rWORD1, rWORD2 - blr -END (strncmp) -libc_hidden_builtin_def (strncmp) |