diff options
Diffstat (limited to 'sysdeps/x86_64/strchr.S')
| -rw-r--r-- | sysdeps/x86_64/strchr.S | 187 |
1 files changed, 0 insertions, 187 deletions
diff --git a/sysdeps/x86_64/strchr.S b/sysdeps/x86_64/strchr.S deleted file mode 100644 index 16c1726803..0000000000 --- a/sysdeps/x86_64/strchr.S +++ /dev/null @@ -1,187 +0,0 @@ -/* strchr (str, ch) -- Return pointer to first occurrence of CH in STR. - For AMD x86-64. - Copyright (C) 2009-2017 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> - - .text -ENTRY (strchr) - movd %esi, %xmm1 - movl %edi, %eax - andl $4095, %eax - punpcklbw %xmm1, %xmm1 - cmpl $4032, %eax - punpcklwd %xmm1, %xmm1 - pshufd $0, %xmm1, %xmm1 - jg L(cross_page) - movdqu (%rdi), %xmm0 - pxor %xmm3, %xmm3 - movdqa %xmm0, %xmm4 - pcmpeqb %xmm1, %xmm0 - pcmpeqb %xmm3, %xmm4 - por %xmm4, %xmm0 - pmovmskb %xmm0, %eax - test %eax, %eax - je L(next_48_bytes) - bsf %eax, %eax -#ifdef AS_STRCHRNUL - leaq (%rdi,%rax), %rax -#else - movl $0, %edx - leaq (%rdi,%rax), %rax - cmpb %sil, (%rax) - cmovne %rdx, %rax -#endif - ret - - .p2align 3 - L(next_48_bytes): - movdqu 16(%rdi), %xmm0 - movdqa %xmm0, %xmm4 - pcmpeqb %xmm1, %xmm0 - pcmpeqb %xmm3, %xmm4 - por %xmm4, %xmm0 - pmovmskb %xmm0, %ecx - movdqu 32(%rdi), %xmm0 - movdqa %xmm0, %xmm4 - pcmpeqb %xmm1, %xmm0 - salq $16, %rcx - pcmpeqb %xmm3, %xmm4 - por %xmm4, %xmm0 - pmovmskb %xmm0, %eax - movdqu 48(%rdi), %xmm0 - pcmpeqb %xmm0, %xmm3 - salq $32, %rax - pcmpeqb %xmm1, %xmm0 - orq %rcx, %rax - por %xmm3, %xmm0 - pmovmskb %xmm0, %ecx - salq $48, %rcx - orq %rcx, %rax - testq %rax, %rax - jne L(return) -L(loop_start): - /* We use this alignment to force loop be aligned to 8 but not - 16 bytes. This gives better sheduling on AMD processors. */ - .p2align 4 - pxor %xmm6, %xmm6 - andq $-64, %rdi - .p2align 3 -L(loop64): - addq $64, %rdi - movdqa (%rdi), %xmm5 - movdqa 16(%rdi), %xmm2 - movdqa 32(%rdi), %xmm3 - pxor %xmm1, %xmm5 - movdqa 48(%rdi), %xmm4 - pxor %xmm1, %xmm2 - pxor %xmm1, %xmm3 - pminub (%rdi), %xmm5 - pxor %xmm1, %xmm4 - pminub 16(%rdi), %xmm2 - pminub 32(%rdi), %xmm3 - pminub %xmm2, %xmm5 - pminub 48(%rdi), %xmm4 - pminub %xmm3, %xmm5 - pminub %xmm4, %xmm5 - pcmpeqb %xmm6, %xmm5 - pmovmskb %xmm5, %eax - - testl %eax, %eax - je L(loop64) - - movdqa (%rdi), %xmm5 - movdqa %xmm5, %xmm0 - pcmpeqb %xmm1, %xmm5 - pcmpeqb %xmm6, %xmm0 - por %xmm0, %xmm5 - pcmpeqb %xmm6, %xmm2 - pcmpeqb %xmm6, %xmm3 - pcmpeqb %xmm6, %xmm4 - - pmovmskb %xmm5, %ecx - pmovmskb %xmm2, %eax - salq $16, %rax - pmovmskb %xmm3, %r8d - pmovmskb %xmm4, %edx - salq $32, %r8 - orq %r8, %rax - orq %rcx, %rax - salq $48, %rdx - orq %rdx, %rax - .p2align 3 -L(return): - bsfq %rax, %rax -#ifdef AS_STRCHRNUL - leaq (%rdi,%rax), %rax -#else - movl $0, %edx - leaq (%rdi,%rax), %rax - cmpb %sil, (%rax) - cmovne %rdx, %rax -#endif - ret - .p2align 4 - -L(cross_page): - movq %rdi, %rdx - pxor %xmm2, %xmm2 - andq $-64, %rdx - movdqa %xmm1, %xmm0 - movdqa (%rdx), %xmm3 - movdqa %xmm3, %xmm4 - pcmpeqb %xmm1, %xmm3 - pcmpeqb %xmm2, %xmm4 - por %xmm4, %xmm3 - pmovmskb %xmm3, %r8d - movdqa 16(%rdx), %xmm3 - movdqa %xmm3, %xmm4 - pcmpeqb %xmm1, %xmm3 - pcmpeqb %xmm2, %xmm4 - por %xmm4, %xmm3 - pmovmskb %xmm3, %eax - movdqa 32(%rdx), %xmm3 - movdqa %xmm3, %xmm4 - pcmpeqb %xmm1, %xmm3 - salq $16, %rax - pcmpeqb %xmm2, %xmm4 - por %xmm4, %xmm3 - pmovmskb %xmm3, %r9d - movdqa 48(%rdx), %xmm3 - pcmpeqb %xmm3, %xmm2 - salq $32, %r9 - pcmpeqb %xmm3, %xmm0 - orq %r9, %rax - orq %r8, %rax - por %xmm2, %xmm0 - pmovmskb %xmm0, %ecx - salq $48, %rcx - orq %rcx, %rax - movl %edi, %ecx - subb %dl, %cl - shrq %cl, %rax - testq %rax, %rax - jne L(return) - jmp L(loop_start) - -END (strchr) - -#ifndef AS_STRCHRNUL -weak_alias (strchr, index) -libc_hidden_builtin_def (strchr) -#endif |