diff options
Diffstat (limited to 'sysdeps/i386/i686/multiarch/strchr-sse2-bsf.S')
| -rw-r--r-- | sysdeps/i386/i686/multiarch/strchr-sse2-bsf.S | 158 |
1 files changed, 0 insertions, 158 deletions
diff --git a/sysdeps/i386/i686/multiarch/strchr-sse2-bsf.S b/sysdeps/i386/i686/multiarch/strchr-sse2-bsf.S deleted file mode 100644 index 95fd7c084e..0000000000 --- a/sysdeps/i386/i686/multiarch/strchr-sse2-bsf.S +++ /dev/null @@ -1,158 +0,0 @@ -/* strchr with SSE2 with bsf - Copyright (C) 2011-2017 Free Software Foundation, Inc. - Contributed by Intel Corporation. - 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/>. */ - -#if IS_IN (libc) - -# include <sysdep.h> - -# define CFI_PUSH(REG) \ - cfi_adjust_cfa_offset (4); \ - cfi_rel_offset (REG, 0) - -# define CFI_POP(REG) \ - cfi_adjust_cfa_offset (-4); \ - cfi_restore (REG) - -# define PUSH(REG) pushl REG; CFI_PUSH (REG) -# define POP(REG) popl REG; CFI_POP (REG) - -# define PARMS 8 -# define ENTRANCE PUSH(%edi) -# define RETURN POP(%edi); ret; CFI_PUSH(%edi); - -# define STR1 PARMS -# define STR2 STR1+4 - - .text -ENTRY (__strchr_sse2_bsf) - - ENTRANCE - mov STR1(%esp), %ecx - movd STR2(%esp), %xmm1 - - pxor %xmm2, %xmm2 - mov %ecx, %edi - punpcklbw %xmm1, %xmm1 - punpcklbw %xmm1, %xmm1 - /* ECX has OFFSET. */ - and $15, %ecx - pshufd $0, %xmm1, %xmm1 - je L(loop) - -/* Handle unaligned string. */ - and $-16, %edi - movdqa (%edi), %xmm0 - pcmpeqb %xmm0, %xmm2 - pcmpeqb %xmm1, %xmm0 - /* Find where NULL is. */ - pmovmskb %xmm2, %edx - /* Check if there is a match. */ - pmovmskb %xmm0, %eax - /* Remove the leading bytes. */ - sarl %cl, %edx - sarl %cl, %eax - test %eax, %eax - je L(unaligned_no_match) - /* Check which byte is a match. */ - bsf %eax, %eax - /* Is there a NULL? */ - test %edx, %edx - je L(unaligned_match) - bsf %edx, %edx - cmpl %edx, %eax - /* Return NULL if NULL comes first. */ - ja L(return_null) -L(unaligned_match): - add %edi, %eax - add %ecx, %eax - RETURN - - .p2align 4 -L(unaligned_no_match): - test %edx, %edx - jne L(return_null) - pxor %xmm2, %xmm2 - - add $16, %edi - - .p2align 4 -/* Loop start on aligned string. */ -L(loop): - movdqa (%edi), %xmm0 - pcmpeqb %xmm0, %xmm2 - add $16, %edi - pcmpeqb %xmm1, %xmm0 - pmovmskb %xmm2, %edx - pmovmskb %xmm0, %eax - or %eax, %edx - jnz L(matches) - - movdqa (%edi), %xmm0 - pcmpeqb %xmm0, %xmm2 - add $16, %edi - pcmpeqb %xmm1, %xmm0 - pmovmskb %xmm2, %edx - pmovmskb %xmm0, %eax - or %eax, %edx - jnz L(matches) - - movdqa (%edi), %xmm0 - pcmpeqb %xmm0, %xmm2 - add $16, %edi - pcmpeqb %xmm1, %xmm0 - pmovmskb %xmm2, %edx - pmovmskb %xmm0, %eax - or %eax, %edx - jnz L(matches) - - movdqa (%edi), %xmm0 - pcmpeqb %xmm0, %xmm2 - add $16, %edi - pcmpeqb %xmm1, %xmm0 - pmovmskb %xmm2, %edx - pmovmskb %xmm0, %eax - or %eax, %edx - jnz L(matches) - jmp L(loop) - -L(matches): - pmovmskb %xmm2, %edx - test %eax, %eax - jz L(return_null) - bsf %eax, %eax - /* There is a match. First find where NULL is. */ - test %edx, %edx - je L(match) - bsf %edx, %ecx - /* Check if NULL comes first. */ - cmpl %ecx, %eax - ja L(return_null) -L(match): - sub $16, %edi - add %edi, %eax - RETURN - -/* Return NULL. */ - .p2align 4 -L(return_null): - xor %eax, %eax - RETURN - -END (__strchr_sse2_bsf) -#endif |