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ceabdcd130
1. Add default ISA level selection in non-multiarch/rtld
implementations.
2. Add ISA level build guards to different implementations.
- I.e strcmp-avx2.S which is ISA level 3 will only build if
compiled ISA level <= 3. Otherwise there is no reason to
include it as we will always use one of the ISA level 4
implementations (strcmp-evex.S).
3. Refactor the ifunc selector and ifunc implementation list to use
the ISA level aware wrapper macros that allow functions below the
compiled ISA level (with a guranteed replacement) to be skipped.
Tested with and without multiarch on x86_64 for ISA levels:
{generic, x86-64-v2, x86-64-v3, x86-64-v4}
And m32 with and without multiarch.
958 lines
23 KiB
ArmAsm
958 lines
23 KiB
ArmAsm
/* wcscmp optimized with SSE2.
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Copyright (C) 2018-2022 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, see
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<https://www.gnu.org/licenses/>. */
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#include <isa-level.h>
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/* ISA level >= 2 because there is no wcscmp-sse4 implementations. */
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#if ISA_SHOULD_BUILD (2)
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# include <sysdep.h>
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/* Needed to get right name. */
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# define USE_AS_WCSCMP
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# define STRCMP_ISA _sse2
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# include "strcmp-naming.h"
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/* Note: wcscmp uses signed comparison, not unsighed as in strcmp function. */
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.text
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ENTRY (STRCMP)
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/*
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* This implementation uses SSE to compare up to 16 bytes at a time.
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*/
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mov %esi, %eax
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mov %edi, %edx
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pxor %xmm0, %xmm0 /* clear %xmm0 for null char checks */
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mov %al, %ch
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mov %dl, %cl
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and $63, %eax /* rsi alignment in cache line */
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and $63, %edx /* rdi alignment in cache line */
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and $15, %cl
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jz L(continue_00)
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cmp $16, %edx
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jb L(continue_0)
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cmp $32, %edx
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jb L(continue_16)
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cmp $48, %edx
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jb L(continue_32)
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L(continue_48):
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and $15, %ch
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jz L(continue_48_00)
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cmp $16, %eax
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jb L(continue_0_48)
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cmp $32, %eax
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jb L(continue_16_48)
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cmp $48, %eax
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jb L(continue_32_48)
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.p2align 4
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L(continue_48_48):
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mov (%rsi), %ecx
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cmp %ecx, (%rdi)
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jne L(nequal)
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test %ecx, %ecx
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jz L(equal)
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mov 4(%rsi), %ecx
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cmp %ecx, 4(%rdi)
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jne L(nequal)
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test %ecx, %ecx
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jz L(equal)
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mov 8(%rsi), %ecx
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cmp %ecx, 8(%rdi)
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jne L(nequal)
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test %ecx, %ecx
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jz L(equal)
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mov 12(%rsi), %ecx
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cmp %ecx, 12(%rdi)
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jne L(nequal)
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test %ecx, %ecx
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jz L(equal)
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movdqu 16(%rdi), %xmm1
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movdqu 16(%rsi), %xmm2
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pcmpeqd %xmm1, %xmm0 /* Any null double_word? */
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pcmpeqd %xmm2, %xmm1 /* compare first 4 double_words for equality */
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psubb %xmm0, %xmm1 /* packed sub of comparison results*/
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pmovmskb %xmm1, %edx
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sub $0xffff, %edx /* if first 4 double_words are same, edx == 0xffff */
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jnz L(less4_double_words_16)
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movdqu 32(%rdi), %xmm1
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movdqu 32(%rsi), %xmm2
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pcmpeqd %xmm1, %xmm0 /* Any null double_word? */
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pcmpeqd %xmm2, %xmm1 /* compare first 4 double_words for equality */
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psubb %xmm0, %xmm1 /* packed sub of comparison results*/
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pmovmskb %xmm1, %edx
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sub $0xffff, %edx /* if first 4 double_words are same, edx == 0xffff */
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jnz L(less4_double_words_32)
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movdqu 48(%rdi), %xmm1
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movdqu 48(%rsi), %xmm2
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pcmpeqd %xmm1, %xmm0 /* Any null double_word? */
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pcmpeqd %xmm2, %xmm1 /* compare first 4 double_words for equality */
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psubb %xmm0, %xmm1 /* packed sub of comparison results*/
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pmovmskb %xmm1, %edx
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sub $0xffff, %edx /* if first 4 double_words are same, edx == 0xffff */
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jnz L(less4_double_words_48)
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add $64, %rsi
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add $64, %rdi
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jmp L(continue_48_48)
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L(continue_0):
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and $15, %ch
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jz L(continue_0_00)
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cmp $16, %eax
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jb L(continue_0_0)
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cmp $32, %eax
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jb L(continue_0_16)
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cmp $48, %eax
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jb L(continue_0_32)
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.p2align 4
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L(continue_0_48):
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mov (%rsi), %ecx
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cmp %ecx, (%rdi)
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jne L(nequal)
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test %ecx, %ecx
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jz L(equal)
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mov 4(%rsi), %ecx
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cmp %ecx, 4(%rdi)
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jne L(nequal)
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test %ecx, %ecx
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jz L(equal)
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mov 8(%rsi), %ecx
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cmp %ecx, 8(%rdi)
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jne L(nequal)
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test %ecx, %ecx
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jz L(equal)
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mov 12(%rsi), %ecx
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cmp %ecx, 12(%rdi)
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jne L(nequal)
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test %ecx, %ecx
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jz L(equal)
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movdqu 16(%rdi), %xmm1
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movdqu 16(%rsi), %xmm2
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pcmpeqd %xmm1, %xmm0 /* Any null double_word? */
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pcmpeqd %xmm2, %xmm1 /* compare first 4 double_words for equality */
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psubb %xmm0, %xmm1 /* packed sub of comparison results*/
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pmovmskb %xmm1, %edx
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sub $0xffff, %edx /* if first 4 double_words are same, edx == 0xffff */
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jnz L(less4_double_words_16)
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movdqu 32(%rdi), %xmm1
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movdqu 32(%rsi), %xmm2
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pcmpeqd %xmm1, %xmm0 /* Any null double_word? */
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pcmpeqd %xmm2, %xmm1 /* compare first 4 double_words for equality */
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psubb %xmm0, %xmm1 /* packed sub of comparison results*/
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pmovmskb %xmm1, %edx
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sub $0xffff, %edx /* if first 4 double_words are same, edx == 0xffff */
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jnz L(less4_double_words_32)
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mov 48(%rsi), %ecx
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cmp %ecx, 48(%rdi)
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jne L(nequal)
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test %ecx, %ecx
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jz L(equal)
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mov 52(%rsi), %ecx
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cmp %ecx, 52(%rdi)
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jne L(nequal)
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test %ecx, %ecx
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jz L(equal)
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mov 56(%rsi), %ecx
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cmp %ecx, 56(%rdi)
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jne L(nequal)
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test %ecx, %ecx
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jz L(equal)
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mov 60(%rsi), %ecx
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cmp %ecx, 60(%rdi)
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jne L(nequal)
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test %ecx, %ecx
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jz L(equal)
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add $64, %rsi
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add $64, %rdi
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jmp L(continue_0_48)
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.p2align 4
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L(continue_00):
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and $15, %ch
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jz L(continue_00_00)
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cmp $16, %eax
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jb L(continue_00_0)
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cmp $32, %eax
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jb L(continue_00_16)
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cmp $48, %eax
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jb L(continue_00_32)
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.p2align 4
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L(continue_00_48):
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pcmpeqd (%rdi), %xmm0
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mov (%rdi), %eax
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pmovmskb %xmm0, %ecx
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test %ecx, %ecx
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jnz L(less4_double_words1)
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cmp (%rsi), %eax
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jne L(nequal)
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mov 4(%rdi), %eax
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cmp 4(%rsi), %eax
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jne L(nequal)
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mov 8(%rdi), %eax
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cmp 8(%rsi), %eax
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jne L(nequal)
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mov 12(%rdi), %eax
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cmp 12(%rsi), %eax
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jne L(nequal)
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movdqu 16(%rsi), %xmm2
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pcmpeqd %xmm2, %xmm0 /* Any null double_word? */
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pcmpeqd 16(%rdi), %xmm2 /* compare first 4 double_words for equality */
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psubb %xmm0, %xmm2 /* packed sub of comparison results*/
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pmovmskb %xmm2, %edx
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sub $0xffff, %edx /* if first 4 double_words are same, edx == 0xffff */
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jnz L(less4_double_words_16)
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movdqu 32(%rsi), %xmm2
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pcmpeqd %xmm2, %xmm0 /* Any null double_word? */
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pcmpeqd 32(%rdi), %xmm2 /* compare first 4 double_words for equality */
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psubb %xmm0, %xmm2 /* packed sub of comparison results*/
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pmovmskb %xmm2, %edx
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sub $0xffff, %edx /* if first 4 double_words are same, edx == 0xffff */
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jnz L(less4_double_words_32)
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movdqu 48(%rsi), %xmm2
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pcmpeqd %xmm2, %xmm0 /* Any null double_word? */
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pcmpeqd 48(%rdi), %xmm2 /* compare first 4 double_words for equality */
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psubb %xmm0, %xmm2 /* packed sub of comparison results*/
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pmovmskb %xmm2, %edx
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sub $0xffff, %edx /* if first 4 double_words are same, edx == 0xffff */
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jnz L(less4_double_words_48)
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add $64, %rsi
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add $64, %rdi
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jmp L(continue_00_48)
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.p2align 4
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L(continue_32):
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and $15, %ch
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jz L(continue_32_00)
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cmp $16, %eax
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jb L(continue_0_32)
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cmp $32, %eax
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jb L(continue_16_32)
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cmp $48, %eax
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jb L(continue_32_32)
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.p2align 4
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L(continue_32_48):
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mov (%rsi), %ecx
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cmp %ecx, (%rdi)
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jne L(nequal)
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test %ecx, %ecx
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jz L(equal)
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mov 4(%rsi), %ecx
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cmp %ecx, 4(%rdi)
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jne L(nequal)
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test %ecx, %ecx
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jz L(equal)
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mov 8(%rsi), %ecx
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cmp %ecx, 8(%rdi)
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jne L(nequal)
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test %ecx, %ecx
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jz L(equal)
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mov 12(%rsi), %ecx
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cmp %ecx, 12(%rdi)
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jne L(nequal)
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test %ecx, %ecx
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jz L(equal)
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mov 16(%rsi), %ecx
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cmp %ecx, 16(%rdi)
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jne L(nequal)
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test %ecx, %ecx
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jz L(equal)
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mov 20(%rsi), %ecx
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cmp %ecx, 20(%rdi)
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jne L(nequal)
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test %ecx, %ecx
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jz L(equal)
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mov 24(%rsi), %ecx
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cmp %ecx, 24(%rdi)
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jne L(nequal)
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test %ecx, %ecx
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jz L(equal)
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mov 28(%rsi), %ecx
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cmp %ecx, 28(%rdi)
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jne L(nequal)
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test %ecx, %ecx
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jz L(equal)
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movdqu 32(%rdi), %xmm1
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movdqu 32(%rsi), %xmm2
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pcmpeqd %xmm1, %xmm0 /* Any null double_word? */
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pcmpeqd %xmm2, %xmm1 /* compare first 4 double_words for equality */
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psubb %xmm0, %xmm1 /* packed sub of comparison results*/
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pmovmskb %xmm1, %edx
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sub $0xffff, %edx /* if first 4 double_words are same, edx == 0xffff */
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jnz L(less4_double_words_32)
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movdqu 48(%rdi), %xmm1
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movdqu 48(%rsi), %xmm2
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pcmpeqd %xmm1, %xmm0 /* Any null double_word? */
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pcmpeqd %xmm2, %xmm1 /* compare first 4 double_words for equality */
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psubb %xmm0, %xmm1 /* packed sub of comparison results*/
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pmovmskb %xmm1, %edx
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sub $0xffff, %edx /* if first 4 double_words are same, edx == 0xffff */
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jnz L(less4_double_words_48)
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add $64, %rsi
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add $64, %rdi
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jmp L(continue_32_48)
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.p2align 4
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L(continue_16):
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and $15, %ch
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jz L(continue_16_00)
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cmp $16, %eax
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jb L(continue_0_16)
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cmp $32, %eax
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jb L(continue_16_16)
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cmp $48, %eax
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jb L(continue_16_32)
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.p2align 4
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L(continue_16_48):
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mov (%rsi), %ecx
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cmp %ecx, (%rdi)
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jne L(nequal)
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test %ecx, %ecx
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jz L(equal)
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mov 4(%rsi), %ecx
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cmp %ecx, 4(%rdi)
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jne L(nequal)
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test %ecx, %ecx
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jz L(equal)
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mov 8(%rsi), %ecx
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cmp %ecx, 8(%rdi)
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jne L(nequal)
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test %ecx, %ecx
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jz L(equal)
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mov 12(%rsi), %ecx
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cmp %ecx, 12(%rdi)
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jne L(nequal)
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test %ecx, %ecx
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jz L(equal)
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movdqu 16(%rdi), %xmm1
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movdqu 16(%rsi), %xmm2
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pcmpeqd %xmm1, %xmm0 /* Any null double_word? */
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pcmpeqd %xmm2, %xmm1 /* compare first 4 double_words for equality */
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psubb %xmm0, %xmm1 /* packed sub of comparison results*/
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pmovmskb %xmm1, %edx
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sub $0xffff, %edx /* if first 4 double_words are same, edx == 0xffff */
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jnz L(less4_double_words_16)
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mov 32(%rsi), %ecx
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cmp %ecx, 32(%rdi)
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jne L(nequal)
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test %ecx, %ecx
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jz L(equal)
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mov 36(%rsi), %ecx
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cmp %ecx, 36(%rdi)
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jne L(nequal)
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test %ecx, %ecx
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jz L(equal)
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mov 40(%rsi), %ecx
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cmp %ecx, 40(%rdi)
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jne L(nequal)
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test %ecx, %ecx
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jz L(equal)
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mov 44(%rsi), %ecx
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cmp %ecx, 44(%rdi)
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jne L(nequal)
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test %ecx, %ecx
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jz L(equal)
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movdqu 48(%rdi), %xmm1
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movdqu 48(%rsi), %xmm2
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pcmpeqd %xmm1, %xmm0 /* Any null double_word? */
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pcmpeqd %xmm2, %xmm1 /* compare first 4 double_words for equality */
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psubb %xmm0, %xmm1 /* packed sub of comparison results*/
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pmovmskb %xmm1, %edx
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sub $0xffff, %edx /* if first 4 double_words are same, edx == 0xffff */
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jnz L(less4_double_words_48)
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add $64, %rsi
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add $64, %rdi
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jmp L(continue_16_48)
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.p2align 4
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L(continue_00_00):
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movdqa (%rdi), %xmm1
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pcmpeqd %xmm1, %xmm0 /* Any null double_word? */
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pcmpeqd (%rsi), %xmm1 /* compare first 4 double_words for equality */
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psubb %xmm0, %xmm1 /* packed sub of comparison results*/
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pmovmskb %xmm1, %edx
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sub $0xffff, %edx /* if first 4 double_words are same, edx == 0xffff */
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jnz L(less4_double_words)
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movdqa 16(%rdi), %xmm3
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pcmpeqd %xmm3, %xmm0 /* Any null double_word? */
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pcmpeqd 16(%rsi), %xmm3 /* compare first 4 double_words for equality */
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psubb %xmm0, %xmm3 /* packed sub of comparison results*/
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pmovmskb %xmm3, %edx
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sub $0xffff, %edx /* if first 4 double_words are same, edx == 0xffff */
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jnz L(less4_double_words_16)
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movdqa 32(%rdi), %xmm5
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pcmpeqd %xmm5, %xmm0 /* Any null double_word? */
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pcmpeqd 32(%rsi), %xmm5 /* compare first 4 double_words for equality */
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psubb %xmm0, %xmm5 /* packed sub of comparison results*/
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pmovmskb %xmm5, %edx
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sub $0xffff, %edx /* if first 4 double_words are same, edx == 0xffff */
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jnz L(less4_double_words_32)
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movdqa 48(%rdi), %xmm1
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pcmpeqd %xmm1, %xmm0 /* Any null double_word? */
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pcmpeqd 48(%rsi), %xmm1 /* compare first 4 double_words for equality */
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psubb %xmm0, %xmm1 /* packed sub of comparison results*/
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pmovmskb %xmm1, %edx
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sub $0xffff, %edx /* if first 4 double_words are same, edx == 0xffff */
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jnz L(less4_double_words_48)
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add $64, %rsi
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add $64, %rdi
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jmp L(continue_00_00)
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.p2align 4
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L(continue_00_32):
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movdqu (%rsi), %xmm2
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pcmpeqd %xmm2, %xmm0 /* Any null double_word? */
|
|
pcmpeqd (%rdi), %xmm2 /* compare first 4 double_words for equality */
|
|
psubb %xmm0, %xmm2 /* packed sub of comparison results*/
|
|
pmovmskb %xmm2, %edx
|
|
sub $0xffff, %edx /* if first 4 double_words are same, edx == 0xffff */
|
|
jnz L(less4_double_words)
|
|
|
|
add $16, %rsi
|
|
add $16, %rdi
|
|
jmp L(continue_00_48)
|
|
|
|
.p2align 4
|
|
L(continue_00_16):
|
|
movdqu (%rsi), %xmm2
|
|
pcmpeqd %xmm2, %xmm0 /* Any null double_word? */
|
|
pcmpeqd (%rdi), %xmm2 /* compare first 4 double_words for equality */
|
|
psubb %xmm0, %xmm2 /* packed sub of comparison results*/
|
|
pmovmskb %xmm2, %edx
|
|
sub $0xffff, %edx /* if first 4 double_words are same, edx == 0xffff */
|
|
jnz L(less4_double_words)
|
|
|
|
movdqu 16(%rsi), %xmm2
|
|
pcmpeqd %xmm2, %xmm0 /* Any null double_word? */
|
|
pcmpeqd 16(%rdi), %xmm2 /* compare first 4 double_words for equality */
|
|
psubb %xmm0, %xmm2 /* packed sub of comparison results*/
|
|
pmovmskb %xmm2, %edx
|
|
sub $0xffff, %edx /* if first 4 double_words are same, edx == 0xffff */
|
|
jnz L(less4_double_words_16)
|
|
|
|
add $32, %rsi
|
|
add $32, %rdi
|
|
jmp L(continue_00_48)
|
|
|
|
.p2align 4
|
|
L(continue_00_0):
|
|
movdqu (%rsi), %xmm2
|
|
pcmpeqd %xmm2, %xmm0 /* Any null double_word? */
|
|
pcmpeqd (%rdi), %xmm2 /* compare first 4 double_words for equality */
|
|
psubb %xmm0, %xmm2 /* packed sub of comparison results*/
|
|
pmovmskb %xmm2, %edx
|
|
sub $0xffff, %edx /* if first 4 double_words are same, edx == 0xffff */
|
|
jnz L(less4_double_words)
|
|
|
|
movdqu 16(%rsi), %xmm2
|
|
pcmpeqd %xmm2, %xmm0 /* Any null double_word? */
|
|
pcmpeqd 16(%rdi), %xmm2 /* compare first 4 double_words for equality */
|
|
psubb %xmm0, %xmm2 /* packed sub of comparison results*/
|
|
pmovmskb %xmm2, %edx
|
|
sub $0xffff, %edx /* if first 4 double_words are same, edx == 0xffff */
|
|
jnz L(less4_double_words_16)
|
|
|
|
movdqu 32(%rsi), %xmm2
|
|
pcmpeqd %xmm2, %xmm0 /* Any null double_word? */
|
|
pcmpeqd 32(%rdi), %xmm2 /* compare first 4 double_words for equality */
|
|
psubb %xmm0, %xmm2 /* packed sub of comparison results*/
|
|
pmovmskb %xmm2, %edx
|
|
sub $0xffff, %edx /* if first 4 double_words are same, edx == 0xffff */
|
|
jnz L(less4_double_words_32)
|
|
|
|
add $48, %rsi
|
|
add $48, %rdi
|
|
jmp L(continue_00_48)
|
|
|
|
.p2align 4
|
|
L(continue_48_00):
|
|
pcmpeqd (%rsi), %xmm0
|
|
mov (%rdi), %eax
|
|
pmovmskb %xmm0, %ecx
|
|
test %ecx, %ecx
|
|
jnz L(less4_double_words1)
|
|
|
|
cmp (%rsi), %eax
|
|
jne L(nequal)
|
|
|
|
mov 4(%rdi), %eax
|
|
cmp 4(%rsi), %eax
|
|
jne L(nequal)
|
|
|
|
mov 8(%rdi), %eax
|
|
cmp 8(%rsi), %eax
|
|
jne L(nequal)
|
|
|
|
mov 12(%rdi), %eax
|
|
cmp 12(%rsi), %eax
|
|
jne L(nequal)
|
|
|
|
movdqu 16(%rdi), %xmm1
|
|
pcmpeqd %xmm1, %xmm0 /* Any null double_word? */
|
|
pcmpeqd 16(%rsi), %xmm1 /* compare first 4 double_words for equality */
|
|
psubb %xmm0, %xmm1 /* packed sub of comparison results*/
|
|
pmovmskb %xmm1, %edx
|
|
sub $0xffff, %edx /* if first 4 double_words are same, edx == 0xffff */
|
|
jnz L(less4_double_words_16)
|
|
|
|
movdqu 32(%rdi), %xmm1
|
|
pcmpeqd %xmm1, %xmm0 /* Any null double_word? */
|
|
pcmpeqd 32(%rsi), %xmm1 /* compare first 4 double_words for equality */
|
|
psubb %xmm0, %xmm1 /* packed sub of comparison results*/
|
|
pmovmskb %xmm1, %edx
|
|
sub $0xffff, %edx /* if first 4 double_words are same, edx == 0xffff */
|
|
jnz L(less4_double_words_32)
|
|
|
|
movdqu 48(%rdi), %xmm1
|
|
pcmpeqd %xmm1, %xmm0 /* Any null double_word? */
|
|
pcmpeqd 48(%rsi), %xmm1 /* compare first 4 double_words for equality */
|
|
psubb %xmm0, %xmm1 /* packed sub of comparison results*/
|
|
pmovmskb %xmm1, %edx
|
|
sub $0xffff, %edx /* if first 4 double_words are same, edx == 0xffff */
|
|
jnz L(less4_double_words_48)
|
|
|
|
add $64, %rsi
|
|
add $64, %rdi
|
|
jmp L(continue_48_00)
|
|
|
|
.p2align 4
|
|
L(continue_32_00):
|
|
movdqu (%rdi), %xmm1
|
|
pcmpeqd %xmm1, %xmm0 /* Any null double_word? */
|
|
pcmpeqd (%rsi), %xmm1 /* compare first 4 double_words for equality */
|
|
psubb %xmm0, %xmm1 /* packed sub of comparison results*/
|
|
pmovmskb %xmm1, %edx
|
|
sub $0xffff, %edx /* if first 4 double_words are same, edx == 0xffff */
|
|
jnz L(less4_double_words)
|
|
|
|
add $16, %rsi
|
|
add $16, %rdi
|
|
jmp L(continue_48_00)
|
|
|
|
.p2align 4
|
|
L(continue_16_00):
|
|
movdqu (%rdi), %xmm1
|
|
pcmpeqd %xmm1, %xmm0 /* Any null double_word? */
|
|
pcmpeqd (%rsi), %xmm1 /* compare first 4 double_words for equality */
|
|
psubb %xmm0, %xmm1 /* packed sub of comparison results*/
|
|
pmovmskb %xmm1, %edx
|
|
sub $0xffff, %edx /* if first 4 double_words are same, edx == 0xffff */
|
|
jnz L(less4_double_words)
|
|
|
|
movdqu 16(%rdi), %xmm1
|
|
pcmpeqd %xmm1, %xmm0 /* Any null double_word? */
|
|
pcmpeqd 16(%rsi), %xmm1 /* compare first 4 double_words for equality */
|
|
psubb %xmm0, %xmm1 /* packed sub of comparison results*/
|
|
pmovmskb %xmm1, %edx
|
|
sub $0xffff, %edx /* if first 4 double_words are same, edx == 0xffff */
|
|
jnz L(less4_double_words_16)
|
|
|
|
add $32, %rsi
|
|
add $32, %rdi
|
|
jmp L(continue_48_00)
|
|
|
|
.p2align 4
|
|
L(continue_0_00):
|
|
movdqu (%rdi), %xmm1
|
|
pcmpeqd %xmm1, %xmm0 /* Any null double_word? */
|
|
pcmpeqd (%rsi), %xmm1 /* compare first 4 double_words for equality */
|
|
psubb %xmm0, %xmm1 /* packed sub of comparison results*/
|
|
pmovmskb %xmm1, %edx
|
|
sub $0xffff, %edx /* if first 4 double_words are same, edx == 0xffff */
|
|
jnz L(less4_double_words)
|
|
|
|
movdqu 16(%rdi), %xmm1
|
|
pcmpeqd %xmm1, %xmm0 /* Any null double_word? */
|
|
pcmpeqd 16(%rsi), %xmm1 /* compare first 4 double_words for equality */
|
|
psubb %xmm0, %xmm1 /* packed sub of comparison results*/
|
|
pmovmskb %xmm1, %edx
|
|
sub $0xffff, %edx /* if first 4 double_words are same, edx == 0xffff */
|
|
jnz L(less4_double_words_16)
|
|
|
|
movdqu 32(%rdi), %xmm1
|
|
pcmpeqd %xmm1, %xmm0 /* Any null double_word? */
|
|
pcmpeqd 32(%rsi), %xmm1 /* compare first 4 double_words for equality */
|
|
psubb %xmm0, %xmm1 /* packed sub of comparison results*/
|
|
pmovmskb %xmm1, %edx
|
|
sub $0xffff, %edx /* if first 4 double_words are same, edx == 0xffff */
|
|
jnz L(less4_double_words_32)
|
|
|
|
add $48, %rsi
|
|
add $48, %rdi
|
|
jmp L(continue_48_00)
|
|
|
|
.p2align 4
|
|
L(continue_32_32):
|
|
movdqu (%rdi), %xmm1
|
|
movdqu (%rsi), %xmm2
|
|
pcmpeqd %xmm1, %xmm0 /* Any null double_word? */
|
|
pcmpeqd %xmm2, %xmm1 /* compare first 4 double_words for equality */
|
|
psubb %xmm0, %xmm1 /* packed sub of comparison results*/
|
|
pmovmskb %xmm1, %edx
|
|
sub $0xffff, %edx /* if first 4 double_words are same, edx == 0xffff */
|
|
jnz L(less4_double_words)
|
|
|
|
add $16, %rsi
|
|
add $16, %rdi
|
|
jmp L(continue_48_48)
|
|
|
|
.p2align 4
|
|
L(continue_16_16):
|
|
movdqu (%rdi), %xmm1
|
|
movdqu (%rsi), %xmm2
|
|
pcmpeqd %xmm1, %xmm0 /* Any null double_word? */
|
|
pcmpeqd %xmm2, %xmm1 /* compare first 4 double_words for equality */
|
|
psubb %xmm0, %xmm1 /* packed sub of comparison results*/
|
|
pmovmskb %xmm1, %edx
|
|
sub $0xffff, %edx /* if first 4 double_words are same, edx == 0xffff */
|
|
jnz L(less4_double_words)
|
|
|
|
movdqu 16(%rdi), %xmm3
|
|
movdqu 16(%rsi), %xmm4
|
|
pcmpeqd %xmm3, %xmm0 /* Any null double_word? */
|
|
pcmpeqd %xmm4, %xmm3 /* compare first 4 double_words for equality */
|
|
psubb %xmm0, %xmm3 /* packed sub of comparison results*/
|
|
pmovmskb %xmm3, %edx
|
|
sub $0xffff, %edx /* if first 4 double_words are same, edx == 0xffff */
|
|
jnz L(less4_double_words_16)
|
|
|
|
add $32, %rsi
|
|
add $32, %rdi
|
|
jmp L(continue_48_48)
|
|
|
|
.p2align 4
|
|
L(continue_0_0):
|
|
movdqu (%rdi), %xmm1
|
|
movdqu (%rsi), %xmm2
|
|
pcmpeqd %xmm1, %xmm0 /* Any null double_word? */
|
|
pcmpeqd %xmm2, %xmm1 /* compare first 4 double_words for equality */
|
|
psubb %xmm0, %xmm1 /* packed sub of comparison results*/
|
|
pmovmskb %xmm1, %edx
|
|
sub $0xffff, %edx /* if first 4 double_words are same, edx == 0xffff */
|
|
jnz L(less4_double_words)
|
|
|
|
movdqu 16(%rdi), %xmm3
|
|
movdqu 16(%rsi), %xmm4
|
|
pcmpeqd %xmm3, %xmm0 /* Any null double_word? */
|
|
pcmpeqd %xmm4, %xmm3 /* compare first 4 double_words for equality */
|
|
psubb %xmm0, %xmm3 /* packed sub of comparison results*/
|
|
pmovmskb %xmm3, %edx
|
|
sub $0xffff, %edx /* if first 4 double_words are same, edx == 0xffff */
|
|
jnz L(less4_double_words_16)
|
|
|
|
movdqu 32(%rdi), %xmm1
|
|
movdqu 32(%rsi), %xmm2
|
|
pcmpeqd %xmm1, %xmm0 /* Any null double_word? */
|
|
pcmpeqd %xmm2, %xmm1 /* compare first 4 double_words for equality */
|
|
psubb %xmm0, %xmm1 /* packed sub of comparison results*/
|
|
pmovmskb %xmm1, %edx
|
|
sub $0xffff, %edx /* if first 4 double_words are same, edx == 0xffff */
|
|
jnz L(less4_double_words_32)
|
|
|
|
add $48, %rsi
|
|
add $48, %rdi
|
|
jmp L(continue_48_48)
|
|
|
|
.p2align 4
|
|
L(continue_0_16):
|
|
movdqu (%rdi), %xmm1
|
|
movdqu (%rsi), %xmm2
|
|
pcmpeqd %xmm1, %xmm0 /* Any null double_word? */
|
|
pcmpeqd %xmm2, %xmm1 /* compare first 4 double_words for equality */
|
|
psubb %xmm0, %xmm1 /* packed sub of comparison results*/
|
|
pmovmskb %xmm1, %edx
|
|
sub $0xffff, %edx /* if first 4 double_words are same, edx == 0xffff */
|
|
jnz L(less4_double_words)
|
|
|
|
movdqu 16(%rdi), %xmm1
|
|
movdqu 16(%rsi), %xmm2
|
|
pcmpeqd %xmm1, %xmm0 /* Any null double_word? */
|
|
pcmpeqd %xmm2, %xmm1 /* compare first 4 double_words for equality */
|
|
psubb %xmm0, %xmm1 /* packed sub of comparison results*/
|
|
pmovmskb %xmm1, %edx
|
|
sub $0xffff, %edx /* if first 4 double_words are same, edx == 0xffff */
|
|
jnz L(less4_double_words_16)
|
|
|
|
add $32, %rsi
|
|
add $32, %rdi
|
|
jmp L(continue_32_48)
|
|
|
|
.p2align 4
|
|
L(continue_0_32):
|
|
movdqu (%rdi), %xmm1
|
|
movdqu (%rsi), %xmm2
|
|
pcmpeqd %xmm1, %xmm0 /* Any null double_word? */
|
|
pcmpeqd %xmm2, %xmm1 /* compare first 4 double_words for equality */
|
|
psubb %xmm0, %xmm1 /* packed sub of comparison results*/
|
|
pmovmskb %xmm1, %edx
|
|
sub $0xffff, %edx /* if first 4 double_words are same, edx == 0xffff */
|
|
jnz L(less4_double_words)
|
|
|
|
add $16, %rsi
|
|
add $16, %rdi
|
|
jmp L(continue_16_48)
|
|
|
|
.p2align 4
|
|
L(continue_16_32):
|
|
movdqu (%rdi), %xmm1
|
|
movdqu (%rsi), %xmm2
|
|
pcmpeqd %xmm1, %xmm0 /* Any null double_word? */
|
|
pcmpeqd %xmm2, %xmm1 /* compare first 4 double_words for equality */
|
|
psubb %xmm0, %xmm1 /* packed sub of comparison results*/
|
|
pmovmskb %xmm1, %edx
|
|
sub $0xffff, %edx /* if first 4 double_words are same, edx == 0xffff */
|
|
jnz L(less4_double_words)
|
|
|
|
add $16, %rsi
|
|
add $16, %rdi
|
|
jmp L(continue_32_48)
|
|
|
|
.p2align 4
|
|
L(less4_double_words1):
|
|
cmp (%rsi), %eax
|
|
jne L(nequal)
|
|
test %eax, %eax
|
|
jz L(equal)
|
|
|
|
mov 4(%rsi), %ecx
|
|
cmp %ecx, 4(%rdi)
|
|
jne L(nequal)
|
|
test %ecx, %ecx
|
|
jz L(equal)
|
|
|
|
mov 8(%rsi), %ecx
|
|
cmp %ecx, 8(%rdi)
|
|
jne L(nequal)
|
|
test %ecx, %ecx
|
|
jz L(equal)
|
|
|
|
mov 12(%rsi), %ecx
|
|
cmp %ecx, 12(%rdi)
|
|
jne L(nequal)
|
|
xor %eax, %eax
|
|
ret
|
|
|
|
.p2align 4
|
|
L(less4_double_words):
|
|
xor %eax, %eax
|
|
test %dl, %dl
|
|
jz L(next_two_double_words)
|
|
and $15, %dl
|
|
jz L(second_double_word)
|
|
mov (%rdi), %eax
|
|
cmp (%rsi), %eax
|
|
jne L(nequal)
|
|
ret
|
|
|
|
.p2align 4
|
|
L(second_double_word):
|
|
mov 4(%rdi), %eax
|
|
cmp 4(%rsi), %eax
|
|
jne L(nequal)
|
|
ret
|
|
|
|
.p2align 4
|
|
L(next_two_double_words):
|
|
and $15, %dh
|
|
jz L(fourth_double_word)
|
|
mov 8(%rdi), %eax
|
|
cmp 8(%rsi), %eax
|
|
jne L(nequal)
|
|
ret
|
|
|
|
.p2align 4
|
|
L(fourth_double_word):
|
|
mov 12(%rdi), %eax
|
|
cmp 12(%rsi), %eax
|
|
jne L(nequal)
|
|
ret
|
|
|
|
.p2align 4
|
|
L(less4_double_words_16):
|
|
xor %eax, %eax
|
|
test %dl, %dl
|
|
jz L(next_two_double_words_16)
|
|
and $15, %dl
|
|
jz L(second_double_word_16)
|
|
mov 16(%rdi), %eax
|
|
cmp 16(%rsi), %eax
|
|
jne L(nequal)
|
|
ret
|
|
|
|
.p2align 4
|
|
L(second_double_word_16):
|
|
mov 20(%rdi), %eax
|
|
cmp 20(%rsi), %eax
|
|
jne L(nequal)
|
|
ret
|
|
|
|
.p2align 4
|
|
L(next_two_double_words_16):
|
|
and $15, %dh
|
|
jz L(fourth_double_word_16)
|
|
mov 24(%rdi), %eax
|
|
cmp 24(%rsi), %eax
|
|
jne L(nequal)
|
|
ret
|
|
|
|
.p2align 4
|
|
L(fourth_double_word_16):
|
|
mov 28(%rdi), %eax
|
|
cmp 28(%rsi), %eax
|
|
jne L(nequal)
|
|
ret
|
|
|
|
.p2align 4
|
|
L(less4_double_words_32):
|
|
xor %eax, %eax
|
|
test %dl, %dl
|
|
jz L(next_two_double_words_32)
|
|
and $15, %dl
|
|
jz L(second_double_word_32)
|
|
mov 32(%rdi), %eax
|
|
cmp 32(%rsi), %eax
|
|
jne L(nequal)
|
|
ret
|
|
|
|
.p2align 4
|
|
L(second_double_word_32):
|
|
mov 36(%rdi), %eax
|
|
cmp 36(%rsi), %eax
|
|
jne L(nequal)
|
|
ret
|
|
|
|
.p2align 4
|
|
L(next_two_double_words_32):
|
|
and $15, %dh
|
|
jz L(fourth_double_word_32)
|
|
mov 40(%rdi), %eax
|
|
cmp 40(%rsi), %eax
|
|
jne L(nequal)
|
|
ret
|
|
|
|
.p2align 4
|
|
L(fourth_double_word_32):
|
|
mov 44(%rdi), %eax
|
|
cmp 44(%rsi), %eax
|
|
jne L(nequal)
|
|
ret
|
|
|
|
.p2align 4
|
|
L(less4_double_words_48):
|
|
xor %eax, %eax
|
|
test %dl, %dl
|
|
jz L(next_two_double_words_48)
|
|
and $15, %dl
|
|
jz L(second_double_word_48)
|
|
mov 48(%rdi), %eax
|
|
cmp 48(%rsi), %eax
|
|
jne L(nequal)
|
|
ret
|
|
|
|
.p2align 4
|
|
L(second_double_word_48):
|
|
mov 52(%rdi), %eax
|
|
cmp 52(%rsi), %eax
|
|
jne L(nequal)
|
|
ret
|
|
|
|
.p2align 4
|
|
L(next_two_double_words_48):
|
|
and $15, %dh
|
|
jz L(fourth_double_word_48)
|
|
mov 56(%rdi), %eax
|
|
cmp 56(%rsi), %eax
|
|
jne L(nequal)
|
|
ret
|
|
|
|
.p2align 4
|
|
L(fourth_double_word_48):
|
|
mov 60(%rdi), %eax
|
|
cmp 60(%rsi), %eax
|
|
jne L(nequal)
|
|
ret
|
|
|
|
.p2align 4
|
|
L(nequal):
|
|
mov $1, %eax
|
|
jg L(nequal_bigger)
|
|
neg %eax
|
|
|
|
L(nequal_bigger):
|
|
ret
|
|
|
|
.p2align 4
|
|
L(equal):
|
|
xor %rax, %rax
|
|
ret
|
|
|
|
END (STRCMP)
|
|
#endif
|