From: "H.J. Lu" <hjl.tools@gmail.com>
To: Noah Goldstein <goldstein.w.n@gmail.com>
Cc: GNU C Library <libc-alpha@sourceware.org>,
"Carlos O'Donell" <carlos@systemhalted.org>
Subject: Re: [PATCH v1 4/4] x86: Move strcmp SSE42 implementation to multiarch/strcmp-sse4_2.S
Date: Tue, 12 Jul 2022 17:07:17 -0700 [thread overview]
Message-ID: <CAMe9rOpMfnuBpFXFfnBsQk_c1E7qh4Kni1BOiiuVNTdU-OLPEQ@mail.gmail.com> (raw)
In-Reply-To: <20220712192808.335531-4-goldstein.w.n@gmail.com>
On Tue, Jul 12, 2022 at 12:28 PM Noah Goldstein <goldstein.w.n@gmail.com> wrote:
>
> This commit doesn't affect libc.so.6, its just housekeeping to prepare
> for adding explicit ISA level support.
>
> Tested build on x86_64 and x86_32 with/without multiarch.
> ---
> .../x86_64/multiarch/strcasecmp_l-sse4_2.S | 3 +-
> sysdeps/x86_64/multiarch/strcmp-sse42.S | 1782 -----------------
> sysdeps/x86_64/multiarch/strcmp-sse4_2.S | 1763 +++++++++++++++-
> sysdeps/x86_64/multiarch/strncase_l-sse4_2.S | 3 +-
> sysdeps/x86_64/multiarch/strncmp-sse4_2.S | 7 +-
> 5 files changed, 1766 insertions(+), 1792 deletions(-)
> delete mode 100644 sysdeps/x86_64/multiarch/strcmp-sse42.S
>
> diff --git a/sysdeps/x86_64/multiarch/strcasecmp_l-sse4_2.S b/sysdeps/x86_64/multiarch/strcasecmp_l-sse4_2.S
> index 411ab7d283..ac03b95756 100644
> --- a/sysdeps/x86_64/multiarch/strcasecmp_l-sse4_2.S
> +++ b/sysdeps/x86_64/multiarch/strcasecmp_l-sse4_2.S
> @@ -16,6 +16,5 @@
> License along with the GNU C Library; if not, see
> <https://www.gnu.org/licenses/>. */
>
> -#define STRCMP_SSE42 __strcasecmp_l_sse42
> #define USE_AS_STRCASECMP_L
> -#include "strcmp-sse42.S"
> +#include "strcmp-sse4_2.S"
> diff --git a/sysdeps/x86_64/multiarch/strcmp-sse42.S b/sysdeps/x86_64/multiarch/strcmp-sse42.S
> deleted file mode 100644
> index 60313c647a..0000000000
> --- a/sysdeps/x86_64/multiarch/strcmp-sse42.S
> +++ /dev/null
> @@ -1,1782 +0,0 @@
> -/* strcmp with SSE4.2
> - Copyright (C) 2009-2022 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>
> -
> -#ifndef STRCMP_SSE42
> -# define STRCMP_SSE42 __strcmp_sse42
> -#endif
> -
> -#if defined USE_AS_STRCASECMP_L || defined USE_AS_STRNCASECMP_L
> -# include "locale-defines.h"
> -#endif
> -
> -#if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L
> -/* Since the counter, %r11, is unsigned, we branch to strcmp_exitz
> - if the new counter > the old one or is 0. */
> -# define UPDATE_STRNCMP_COUNTER \
> - /* calculate left number to compare */ \
> - lea -16(%rcx, %r11), %r9; \
> - cmp %r9, %r11; \
> - jb LABEL(strcmp_exitz); \
> - test %r9, %r9; \
> - je LABEL(strcmp_exitz); \
> - mov %r9, %r11
> -#else
> -# define UPDATE_STRNCMP_COUNTER
> -#endif
> -
> -#define SECTION sse4.2
> -#define GLABEL(l) l##_sse42
> -
> -#define LABEL(l) .L##l
> -
> -/* We use 0x1a:
> - _SIDD_SBYTE_OPS
> - | _SIDD_CMP_EQUAL_EACH
> - | _SIDD_NEGATIVE_POLARITY
> - | _SIDD_LEAST_SIGNIFICANT
> - on pcmpistri to find out if two 16byte data elements are the same
> - and the offset of the first different byte. There are 4 cases:
> -
> - 1. Both 16byte data elements are valid and identical.
> - 2. Both 16byte data elements have EOS and identical.
> - 3. Both 16byte data elements are valid and they differ at offset X.
> - 4. At least one 16byte data element has EOS at offset X. Two 16byte
> - data elements must differ at or before offset X.
> -
> - Here is the table of ECX, CFlag, ZFlag and SFlag for 4 cases:
> -
> - case ECX CFlag ZFlag SFlag
> - 1 16 0 0 0
> - 2 16 0 1 1
> - 3 X 1 0 0
> - 4 0 <= X 1 0/1 0/1
> -
> - We exit from the loop for cases 2, 3 and 4 with jbe which branches
> - when either CFlag or ZFlag is 1. If CFlag == 0, we return 0 for
> - case 2. */
> -
> - /* Put all SSE 4.2 functions together. */
> - .section .text.SECTION,"ax",@progbits
> - .align 16
> - .type STRCMP_SSE42, @function
> - .globl STRCMP_SSE42
> -#ifdef USE_AS_STRCASECMP_L
> -ENTRY (GLABEL(__strcasecmp))
> - movq __libc_tsd_LOCALE@gottpoff(%rip),%rax
> - mov %fs:(%rax),%RDX_LP
> -
> - /* Either 1 or 5 bytes (dependeing if CET is enabled). */
> - .p2align 4
> -END (GLABEL(__strcasecmp))
> - /* FALLTHROUGH to strcasecmp_l. */
> -#endif
> -#ifdef USE_AS_STRNCASECMP_L
> -ENTRY (GLABEL(__strncasecmp))
> - movq __libc_tsd_LOCALE@gottpoff(%rip),%rax
> - mov %fs:(%rax),%RCX_LP
> -
> - /* Either 1 or 5 bytes (dependeing if CET is enabled). */
> - .p2align 4
> -END (GLABEL(__strncasecmp))
> - /* FALLTHROUGH to strncasecmp_l. */
> -#endif
> -
> -
> -#define arg arg
> -
> -STRCMP_SSE42:
> - cfi_startproc
> - _CET_ENDBR
> - CALL_MCOUNT
> -
> -/*
> - * This implementation uses SSE to compare up to 16 bytes at a time.
> - */
> -#ifdef USE_AS_STRCASECMP_L
> - /* We have to fall back on the C implementation for locales
> - with encodings not matching ASCII for single bytes. */
> -# if LOCALE_T___LOCALES != 0 || LC_CTYPE != 0
> - mov LOCALE_T___LOCALES+LC_CTYPE*LP_SIZE(%rdx), %RAX_LP
> -# else
> - mov (%rdx), %RAX_LP
> -# endif
> - testl $1, LOCALE_DATA_VALUES+_NL_CTYPE_NONASCII_CASE*SIZEOF_VALUES(%rax)
> - jne __strcasecmp_l_nonascii
> -#endif
> -#ifdef USE_AS_STRNCASECMP_L
> - /* We have to fall back on the C implementation for locales
> - with encodings not matching ASCII for single bytes. */
> -# if LOCALE_T___LOCALES != 0 || LC_CTYPE != 0
> - mov LOCALE_T___LOCALES+LC_CTYPE*LP_SIZE(%rcx), %RAX_LP
> -# else
> - mov (%rcx), %RAX_LP
> -# endif
> - testl $1, LOCALE_DATA_VALUES+_NL_CTYPE_NONASCII_CASE*SIZEOF_VALUES(%rax)
> - jne __strncasecmp_l_nonascii
> -#endif
> -
> -#if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L
> - test %RDX_LP, %RDX_LP
> - je LABEL(strcmp_exitz)
> - cmp $1, %RDX_LP
> - je LABEL(Byte0)
> - mov %RDX_LP, %R11_LP
> -#endif
> - mov %esi, %ecx
> - mov %edi, %eax
> -/* Use 64bit AND here to avoid long NOP padding. */
> - and $0x3f, %rcx /* rsi alignment in cache line */
> - and $0x3f, %rax /* rdi alignment in cache line */
> -#if defined USE_AS_STRCASECMP_L || defined USE_AS_STRNCASECMP_L
> - .section .rodata.cst16,"aM",@progbits,16
> - .align 16
> -LABEL(lcase_min):
> - .quad 0x3f3f3f3f3f3f3f3f
> - .quad 0x3f3f3f3f3f3f3f3f
> -LABEL(lcase_max):
> - .quad 0x9999999999999999
> - .quad 0x9999999999999999
> -LABEL(case_add):
> - .quad 0x2020202020202020
> - .quad 0x2020202020202020
> - .previous
> - movdqa LABEL(lcase_min)(%rip), %xmm4
> -# define LCASE_MIN_reg %xmm4
> - movdqa LABEL(lcase_max)(%rip), %xmm5
> -# define LCASE_MAX_reg %xmm5
> - movdqa LABEL(case_add)(%rip), %xmm6
> -# define CASE_ADD_reg %xmm6
> -#endif
> - cmp $0x30, %ecx
> - ja LABEL(crosscache)/* rsi: 16-byte load will cross cache line */
> - cmp $0x30, %eax
> - ja LABEL(crosscache)/* rdi: 16-byte load will cross cache line */
> - movdqu (%rdi), %xmm1
> - movdqu (%rsi), %xmm2
> -#if defined USE_AS_STRCASECMP_L || defined USE_AS_STRNCASECMP_L
> -# define TOLOWER(reg1, reg2) \
> - movdqa LCASE_MIN_reg, %xmm7; \
> - movdqa LCASE_MIN_reg, %xmm8; \
> - paddb reg1, %xmm7; \
> - paddb reg2, %xmm8; \
> - pcmpgtb LCASE_MAX_reg, %xmm7; \
> - pcmpgtb LCASE_MAX_reg, %xmm8; \
> - pandn CASE_ADD_reg, %xmm7; \
> - pandn CASE_ADD_reg, %xmm8; \
> - paddb %xmm7, reg1; \
> - paddb %xmm8, reg2
> -
> - TOLOWER (%xmm1, %xmm2)
> -#else
> -# define TOLOWER(reg1, reg2)
> -#endif
> - pxor %xmm0, %xmm0 /* clear %xmm0 for null char checks */
> - pcmpeqb %xmm1, %xmm0 /* Any null chars? */
> - pcmpeqb %xmm2, %xmm1 /* compare first 16 bytes for equality */
> - psubb %xmm0, %xmm1 /* packed sub of comparison results*/
> - pmovmskb %xmm1, %edx
> - sub $0xffff, %edx /* if first 16 bytes are same, edx == 0xffff */
> - jnz LABEL(less16bytes)/* If not, find different value or null char */
> -#if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L
> - sub $16, %r11
> - jbe LABEL(strcmp_exitz)/* finish comparison */
> -#endif
> - add $16, %rsi /* prepare to search next 16 bytes */
> - add $16, %rdi /* prepare to search next 16 bytes */
> -
> - /*
> - * Determine source and destination string offsets from 16-byte
> - * alignment. Use relative offset difference between the two to
> - * determine which case below to use.
> - */
> - .p2align 4
> -LABEL(crosscache):
> - and $0xfffffffffffffff0, %rsi /* force %rsi is 16 byte aligned */
> - and $0xfffffffffffffff0, %rdi /* force %rdi is 16 byte aligned */
> - mov $0xffff, %edx /* for equivalent offset */
> - xor %r8d, %r8d
> - and $0xf, %ecx /* offset of rsi */
> - and $0xf, %eax /* offset of rdi */
> - pxor %xmm0, %xmm0 /* clear %xmm0 for null char check */
> - cmp %eax, %ecx
> - je LABEL(ashr_0) /* rsi and rdi relative offset same */
> - ja LABEL(bigger)
> - mov %edx, %r8d /* r8d is offset flag for exit tail */
> - xchg %ecx, %eax
> - xchg %rsi, %rdi
> -LABEL(bigger):
> - movdqa (%rdi), %xmm2
> - movdqa (%rsi), %xmm1
> - lea 15(%rax), %r9
> - sub %rcx, %r9
> - lea LABEL(unaligned_table)(%rip), %r10
> - movslq (%r10, %r9,4), %r9
> - pcmpeqb %xmm1, %xmm0 /* Any null chars? */
> - lea (%r10, %r9), %r10
> - _CET_NOTRACK jmp *%r10 /* jump to corresponding case */
> -
> -/*
> - * The following cases will be handled by ashr_0
> - * rcx(offset of rsi) rax(offset of rdi) relative offset corresponding case
> - * n(0~15) n(0~15) 15(15+ n-n) ashr_0
> - */
> - .p2align 4
> -LABEL(ashr_0):
> -
> - movdqa (%rsi), %xmm1
> - pcmpeqb %xmm1, %xmm0 /* Any null chars? */
> -#if !defined USE_AS_STRCASECMP_L && !defined USE_AS_STRNCASECMP_L
> - pcmpeqb (%rdi), %xmm1 /* compare 16 bytes for equality */
> -#else
> - movdqa (%rdi), %xmm2
> - TOLOWER (%xmm1, %xmm2)
> - pcmpeqb %xmm2, %xmm1 /* compare 16 bytes for equality */
> -#endif
> - psubb %xmm0, %xmm1 /* packed sub of comparison results*/
> - pmovmskb %xmm1, %r9d
> - shr %cl, %edx /* adjust 0xffff for offset */
> - shr %cl, %r9d /* adjust for 16-byte offset */
> - sub %r9d, %edx
> - /*
> - * edx must be the same with r9d if in left byte (16-rcx) is equal to
> - * the start from (16-rax) and no null char was seen.
> - */
> - jne LABEL(less32bytes) /* mismatch or null char */
> - UPDATE_STRNCMP_COUNTER
> - mov $16, %rcx
> - mov $16, %r9
> -
> - /*
> - * Now both strings are aligned at 16-byte boundary. Loop over strings
> - * checking 32-bytes per iteration.
> - */
> - mov %rcx, %rdx /* only for offset of sse4 instruction loop*/
> - .p2align 4
> -LABEL(ashr_0_use):
> - movdqa (%rdi,%rdx), %xmm0
> -#if !defined USE_AS_STRCASECMP_L && !defined USE_AS_STRNCASECMP_L
> - pcmpistri $0x1a,(%rsi,%rdx), %xmm0
> -#else
> - movdqa (%rsi,%rdx), %xmm1
> - TOLOWER (%xmm0, %xmm1)
> - pcmpistri $0x1a, %xmm1, %xmm0
> -#endif
> - lea 16(%rdx), %rdx
> - jbe LABEL(ashr_0_exit_use)
> -#if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L
> - sub $16, %r11
> - jbe LABEL(strcmp_exitz)
> -#endif
> -
> - movdqa (%rdi,%rdx), %xmm0
> -#if !defined USE_AS_STRCASECMP_L && !defined USE_AS_STRNCASECMP_L
> - pcmpistri $0x1a,(%rsi,%rdx), %xmm0
> -#else
> - movdqa (%rsi,%rdx), %xmm1
> - TOLOWER (%xmm0, %xmm1)
> - pcmpistri $0x1a, %xmm1, %xmm0
> -#endif
> - lea 16(%rdx), %rdx
> - jbe LABEL(ashr_0_exit_use)
> -#if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L
> - sub $16, %r11
> - jbe LABEL(strcmp_exitz)
> -#endif
> - jmp LABEL(ashr_0_use)
> -
> -
> - .p2align 4
> -LABEL(ashr_0_exit_use):
> - jnc LABEL(strcmp_exitz)
> -#if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L
> - sub %rcx, %r11
> - jbe LABEL(strcmp_exitz)
> -#endif
> - lea -16(%rdx, %rcx), %rcx
> - movzbl (%rdi, %rcx), %eax
> - movzbl (%rsi, %rcx), %edx
> -#if defined USE_AS_STRCASECMP_L || defined USE_AS_STRNCASECMP_L
> - leaq _nl_C_LC_CTYPE_tolower+128*4(%rip), %rcx
> - movl (%rcx,%rax,4), %eax
> - movl (%rcx,%rdx,4), %edx
> -#endif
> - sub %edx, %eax
> - ret
> -
> -
> -
> -/*
> - * The following cases will be handled by ashr_1
> - * rcx(offset of rsi) rax(offset of rdi) relative offset corresponding case
> - * n(15) n -15 0(15 +(n-15) - n) ashr_1
> - */
> - .p2align 4
> -LABEL(ashr_1):
> - pslldq $15, %xmm2 /* shift first string to align with second */
> - TOLOWER (%xmm1, %xmm2)
> - pcmpeqb %xmm1, %xmm2 /* compare 16 bytes for equality */
> - psubb %xmm0, %xmm2 /* packed sub of comparison results*/
> - pmovmskb %xmm2, %r9d
> - shr %cl, %edx /* adjust 0xffff for offset */
> - shr %cl, %r9d /* adjust for 16-byte offset */
> - sub %r9d, %edx
> - jnz LABEL(less32bytes) /* mismatch or null char seen */
> - movdqa (%rdi), %xmm3
> - UPDATE_STRNCMP_COUNTER
> -
> - mov $16, %rcx /* index for loads*/
> - mov $1, %r9d /* byte position left over from less32bytes case */
> - /*
> - * Setup %r10 value allows us to detect crossing a page boundary.
> - * When %r10 goes positive we have crossed a page boundary and
> - * need to do a nibble.
> - */
> - lea 1(%rdi), %r10
> - and $0xfff, %r10 /* offset into 4K page */
> - sub $0x1000, %r10 /* subtract 4K pagesize */
> - mov %rcx, %rdx /* only for offset of sse4 instruction loop*/
> -
> - .p2align 4
> -LABEL(loop_ashr_1_use):
> - add $16, %r10
> - jg LABEL(nibble_ashr_1_use)
> -
> -LABEL(nibble_ashr_1_restart_use):
> - movdqa (%rdi, %rdx), %xmm0
> - palignr $1, -16(%rdi, %rdx), %xmm0
> -#if !defined USE_AS_STRCASECMP_L && !defined USE_AS_STRNCASECMP_L
> - pcmpistri $0x1a,(%rsi,%rdx), %xmm0
> -#else
> - movdqa (%rsi,%rdx), %xmm1
> - TOLOWER (%xmm0, %xmm1)
> - pcmpistri $0x1a, %xmm1, %xmm0
> -#endif
> - jbe LABEL(exit_use)
> -#if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L
> - sub $16, %r11
> - jbe LABEL(strcmp_exitz)
> -#endif
> -
> - add $16, %rdx
> - add $16, %r10
> - jg LABEL(nibble_ashr_1_use)
> -
> - movdqa (%rdi, %rdx), %xmm0
> - palignr $1, -16(%rdi, %rdx), %xmm0
> -#if !defined USE_AS_STRCASECMP_L && !defined USE_AS_STRNCASECMP_L
> - pcmpistri $0x1a,(%rsi,%rdx), %xmm0
> -#else
> - movdqa (%rsi,%rdx), %xmm1
> - TOLOWER (%xmm0, %xmm1)
> - pcmpistri $0x1a, %xmm1, %xmm0
> -#endif
> - jbe LABEL(exit_use)
> -#if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L
> - sub $16, %r11
> - jbe LABEL(strcmp_exitz)
> -#endif
> - add $16, %rdx
> - jmp LABEL(loop_ashr_1_use)
> -
> - .p2align 4
> -LABEL(nibble_ashr_1_use):
> - sub $0x1000, %r10
> - movdqa -16(%rdi, %rdx), %xmm0
> - psrldq $1, %xmm0
> - pcmpistri $0x3a,%xmm0, %xmm0
> -#if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L
> - cmp %r11, %rcx
> - jae LABEL(nibble_ashr_exit_use)
> -#endif
> - cmp $14, %ecx
> - ja LABEL(nibble_ashr_1_restart_use)
> -
> - jmp LABEL(nibble_ashr_exit_use)
> -
> -/*
> - * The following cases will be handled by ashr_2
> - * rcx(offset of rsi) rax(offset of rdi) relative offset corresponding case
> - * n(14~15) n -14 1(15 +(n-14) - n) ashr_2
> - */
> - .p2align 4
> -LABEL(ashr_2):
> - pslldq $14, %xmm2
> - TOLOWER (%xmm1, %xmm2)
> - pcmpeqb %xmm1, %xmm2
> - psubb %xmm0, %xmm2
> - pmovmskb %xmm2, %r9d
> - shr %cl, %edx
> - shr %cl, %r9d
> - sub %r9d, %edx
> - jnz LABEL(less32bytes)
> - movdqa (%rdi), %xmm3
> - UPDATE_STRNCMP_COUNTER
> -
> - mov $16, %rcx /* index for loads */
> - mov $2, %r9d /* byte position left over from less32bytes case */
> - /*
> - * Setup %r10 value allows us to detect crossing a page boundary.
> - * When %r10 goes positive we have crossed a page boundary and
> - * need to do a nibble.
> - */
> - lea 2(%rdi), %r10
> - and $0xfff, %r10 /* offset into 4K page */
> - sub $0x1000, %r10 /* subtract 4K pagesize */
> - mov %rcx, %rdx /* only for offset of sse4 instruction loop*/
> -
> - .p2align 4
> -LABEL(loop_ashr_2_use):
> - add $16, %r10
> - jg LABEL(nibble_ashr_2_use)
> -
> -LABEL(nibble_ashr_2_restart_use):
> - movdqa (%rdi, %rdx), %xmm0
> - palignr $2, -16(%rdi, %rdx), %xmm0
> -#if !defined USE_AS_STRCASECMP_L && !defined USE_AS_STRNCASECMP_L
> - pcmpistri $0x1a,(%rsi,%rdx), %xmm0
> -#else
> - movdqa (%rsi,%rdx), %xmm1
> - TOLOWER (%xmm0, %xmm1)
> - pcmpistri $0x1a, %xmm1, %xmm0
> -#endif
> - jbe LABEL(exit_use)
> -#if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L
> - sub $16, %r11
> - jbe LABEL(strcmp_exitz)
> -#endif
> -
> - add $16, %rdx
> - add $16, %r10
> - jg LABEL(nibble_ashr_2_use)
> -
> - movdqa (%rdi, %rdx), %xmm0
> - palignr $2, -16(%rdi, %rdx), %xmm0
> -#if !defined USE_AS_STRCASECMP_L && !defined USE_AS_STRNCASECMP_L
> - pcmpistri $0x1a,(%rsi,%rdx), %xmm0
> -#else
> - movdqa (%rsi,%rdx), %xmm1
> - TOLOWER (%xmm0, %xmm1)
> - pcmpistri $0x1a, %xmm1, %xmm0
> -#endif
> - jbe LABEL(exit_use)
> -#if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L
> - sub $16, %r11
> - jbe LABEL(strcmp_exitz)
> -#endif
> - add $16, %rdx
> - jmp LABEL(loop_ashr_2_use)
> -
> - .p2align 4
> -LABEL(nibble_ashr_2_use):
> - sub $0x1000, %r10
> - movdqa -16(%rdi, %rdx), %xmm0
> - psrldq $2, %xmm0
> - pcmpistri $0x3a,%xmm0, %xmm0
> -#if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L
> - cmp %r11, %rcx
> - jae LABEL(nibble_ashr_exit_use)
> -#endif
> - cmp $13, %ecx
> - ja LABEL(nibble_ashr_2_restart_use)
> -
> - jmp LABEL(nibble_ashr_exit_use)
> -
> -/*
> - * The following cases will be handled by ashr_3
> - * rcx(offset of rsi) rax(offset of rdi) relative offset corresponding case
> - * n(13~15) n -13 2(15 +(n-13) - n) ashr_3
> - */
> - .p2align 4
> -LABEL(ashr_3):
> - pslldq $13, %xmm2
> - TOLOWER (%xmm1, %xmm2)
> - pcmpeqb %xmm1, %xmm2
> - psubb %xmm0, %xmm2
> - pmovmskb %xmm2, %r9d
> - shr %cl, %edx
> - shr %cl, %r9d
> - sub %r9d, %edx
> - jnz LABEL(less32bytes)
> - movdqa (%rdi), %xmm3
> -
> - UPDATE_STRNCMP_COUNTER
> -
> - mov $16, %rcx /* index for loads */
> - mov $3, %r9d /* byte position left over from less32bytes case */
> - /*
> - * Setup %r10 value allows us to detect crossing a page boundary.
> - * When %r10 goes positive we have crossed a page boundary and
> - * need to do a nibble.
> - */
> - lea 3(%rdi), %r10
> - and $0xfff, %r10 /* offset into 4K page */
> - sub $0x1000, %r10 /* subtract 4K pagesize */
> - mov %rcx, %rdx /* only for offset of sse4 instruction loop*/
> -
> -LABEL(loop_ashr_3_use):
> - add $16, %r10
> - jg LABEL(nibble_ashr_3_use)
> -
> -LABEL(nibble_ashr_3_restart_use):
> - movdqa (%rdi, %rdx), %xmm0
> - palignr $3, -16(%rdi, %rdx), %xmm0
> -#if !defined USE_AS_STRCASECMP_L && !defined USE_AS_STRNCASECMP_L
> - pcmpistri $0x1a,(%rsi,%rdx), %xmm0
> -#else
> - movdqa (%rsi,%rdx), %xmm1
> - TOLOWER (%xmm0, %xmm1)
> - pcmpistri $0x1a, %xmm1, %xmm0
> -#endif
> - jbe LABEL(exit_use)
> -#if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L
> - sub $16, %r11
> - jbe LABEL(strcmp_exitz)
> -#endif
> -
> - add $16, %rdx
> - add $16, %r10
> - jg LABEL(nibble_ashr_3_use)
> -
> - movdqa (%rdi, %rdx), %xmm0
> - palignr $3, -16(%rdi, %rdx), %xmm0
> -#if !defined USE_AS_STRCASECMP_L && !defined USE_AS_STRNCASECMP_L
> - pcmpistri $0x1a,(%rsi,%rdx), %xmm0
> -#else
> - movdqa (%rsi,%rdx), %xmm1
> - TOLOWER (%xmm0, %xmm1)
> - pcmpistri $0x1a, %xmm1, %xmm0
> -#endif
> - jbe LABEL(exit_use)
> -#if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L
> - sub $16, %r11
> - jbe LABEL(strcmp_exitz)
> -#endif
> - add $16, %rdx
> - jmp LABEL(loop_ashr_3_use)
> -
> - .p2align 4
> -LABEL(nibble_ashr_3_use):
> - sub $0x1000, %r10
> - movdqa -16(%rdi, %rdx), %xmm0
> - psrldq $3, %xmm0
> - pcmpistri $0x3a,%xmm0, %xmm0
> -#if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L
> - cmp %r11, %rcx
> - jae LABEL(nibble_ashr_exit_use)
> -#endif
> - cmp $12, %ecx
> - ja LABEL(nibble_ashr_3_restart_use)
> -
> - jmp LABEL(nibble_ashr_exit_use)
> -
> -/*
> - * The following cases will be handled by ashr_4
> - * rcx(offset of rsi) rax(offset of rdi) relative offset corresponding case
> - * n(12~15) n -12 3(15 +(n-12) - n) ashr_4
> - */
> - .p2align 4
> -LABEL(ashr_4):
> - pslldq $12, %xmm2
> - TOLOWER (%xmm1, %xmm2)
> - pcmpeqb %xmm1, %xmm2
> - psubb %xmm0, %xmm2
> - pmovmskb %xmm2, %r9d
> - shr %cl, %edx
> - shr %cl, %r9d
> - sub %r9d, %edx
> - jnz LABEL(less32bytes)
> - movdqa (%rdi), %xmm3
> -
> - UPDATE_STRNCMP_COUNTER
> -
> - mov $16, %rcx /* index for loads */
> - mov $4, %r9d /* byte position left over from less32bytes case */
> - /*
> - * Setup %r10 value allows us to detect crossing a page boundary.
> - * When %r10 goes positive we have crossed a page boundary and
> - * need to do a nibble.
> - */
> - lea 4(%rdi), %r10
> - and $0xfff, %r10 /* offset into 4K page */
> - sub $0x1000, %r10 /* subtract 4K pagesize */
> - mov %rcx, %rdx /* only for offset of sse4 instruction loop*/
> -
> - .p2align 4
> -LABEL(loop_ashr_4_use):
> - add $16, %r10
> - jg LABEL(nibble_ashr_4_use)
> -
> -LABEL(nibble_ashr_4_restart_use):
> - movdqa (%rdi, %rdx), %xmm0
> - palignr $4, -16(%rdi, %rdx), %xmm0
> -#if !defined USE_AS_STRCASECMP_L && !defined USE_AS_STRNCASECMP_L
> - pcmpistri $0x1a,(%rsi,%rdx), %xmm0
> -#else
> - movdqa (%rsi,%rdx), %xmm1
> - TOLOWER (%xmm0, %xmm1)
> - pcmpistri $0x1a, %xmm1, %xmm0
> -#endif
> - jbe LABEL(exit_use)
> -#if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L
> - sub $16, %r11
> - jbe LABEL(strcmp_exitz)
> -#endif
> -
> - add $16, %rdx
> - add $16, %r10
> - jg LABEL(nibble_ashr_4_use)
> -
> - movdqa (%rdi, %rdx), %xmm0
> - palignr $4, -16(%rdi, %rdx), %xmm0
> -#if !defined USE_AS_STRCASECMP_L && !defined USE_AS_STRNCASECMP_L
> - pcmpistri $0x1a,(%rsi,%rdx), %xmm0
> -#else
> - movdqa (%rsi,%rdx), %xmm1
> - TOLOWER (%xmm0, %xmm1)
> - pcmpistri $0x1a, %xmm1, %xmm0
> -#endif
> - jbe LABEL(exit_use)
> -#if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L
> - sub $16, %r11
> - jbe LABEL(strcmp_exitz)
> -#endif
> - add $16, %rdx
> - jmp LABEL(loop_ashr_4_use)
> -
> - .p2align 4
> -LABEL(nibble_ashr_4_use):
> - sub $0x1000, %r10
> - movdqa -16(%rdi, %rdx), %xmm0
> - psrldq $4, %xmm0
> - pcmpistri $0x3a,%xmm0, %xmm0
> -#if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L
> - cmp %r11, %rcx
> - jae LABEL(nibble_ashr_exit_use)
> -#endif
> - cmp $11, %ecx
> - ja LABEL(nibble_ashr_4_restart_use)
> -
> - jmp LABEL(nibble_ashr_exit_use)
> -
> -/*
> - * The following cases will be handled by ashr_5
> - * rcx(offset of rsi) rax(offset of rdi) relative offset corresponding case
> - * n(11~15) n - 11 4(15 +(n-11) - n) ashr_5
> - */
> - .p2align 4
> -LABEL(ashr_5):
> - pslldq $11, %xmm2
> - TOLOWER (%xmm1, %xmm2)
> - pcmpeqb %xmm1, %xmm2
> - psubb %xmm0, %xmm2
> - pmovmskb %xmm2, %r9d
> - shr %cl, %edx
> - shr %cl, %r9d
> - sub %r9d, %edx
> - jnz LABEL(less32bytes)
> - movdqa (%rdi), %xmm3
> -
> - UPDATE_STRNCMP_COUNTER
> -
> - mov $16, %rcx /* index for loads */
> - mov $5, %r9d /* byte position left over from less32bytes case */
> - /*
> - * Setup %r10 value allows us to detect crossing a page boundary.
> - * When %r10 goes positive we have crossed a page boundary and
> - * need to do a nibble.
> - */
> - lea 5(%rdi), %r10
> - and $0xfff, %r10 /* offset into 4K page */
> - sub $0x1000, %r10 /* subtract 4K pagesize */
> - mov %rcx, %rdx /* only for offset of sse4 instruction loop*/
> -
> - .p2align 4
> -LABEL(loop_ashr_5_use):
> - add $16, %r10
> - jg LABEL(nibble_ashr_5_use)
> -
> -LABEL(nibble_ashr_5_restart_use):
> - movdqa (%rdi, %rdx), %xmm0
> - palignr $5, -16(%rdi, %rdx), %xmm0
> -#if !defined USE_AS_STRCASECMP_L && !defined USE_AS_STRNCASECMP_L
> - pcmpistri $0x1a,(%rsi,%rdx), %xmm0
> -#else
> - movdqa (%rsi,%rdx), %xmm1
> - TOLOWER (%xmm0, %xmm1)
> - pcmpistri $0x1a, %xmm1, %xmm0
> -#endif
> - jbe LABEL(exit_use)
> -#if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L
> - sub $16, %r11
> - jbe LABEL(strcmp_exitz)
> -#endif
> -
> - add $16, %rdx
> - add $16, %r10
> - jg LABEL(nibble_ashr_5_use)
> -
> - movdqa (%rdi, %rdx), %xmm0
> -
> - palignr $5, -16(%rdi, %rdx), %xmm0
> -#if !defined USE_AS_STRCASECMP_L && !defined USE_AS_STRNCASECMP_L
> - pcmpistri $0x1a,(%rsi,%rdx), %xmm0
> -#else
> - movdqa (%rsi,%rdx), %xmm1
> - TOLOWER (%xmm0, %xmm1)
> - pcmpistri $0x1a, %xmm1, %xmm0
> -#endif
> - jbe LABEL(exit_use)
> -#if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L
> - sub $16, %r11
> - jbe LABEL(strcmp_exitz)
> -#endif
> - add $16, %rdx
> - jmp LABEL(loop_ashr_5_use)
> -
> - .p2align 4
> -LABEL(nibble_ashr_5_use):
> - sub $0x1000, %r10
> - movdqa -16(%rdi, %rdx), %xmm0
> - psrldq $5, %xmm0
> - pcmpistri $0x3a,%xmm0, %xmm0
> -#if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L
> - cmp %r11, %rcx
> - jae LABEL(nibble_ashr_exit_use)
> -#endif
> - cmp $10, %ecx
> - ja LABEL(nibble_ashr_5_restart_use)
> -
> - jmp LABEL(nibble_ashr_exit_use)
> -
> -/*
> - * The following cases will be handled by ashr_6
> - * rcx(offset of rsi) rax(offset of rdi) relative offset corresponding case
> - * n(10~15) n - 10 5(15 +(n-10) - n) ashr_6
> - */
> - .p2align 4
> -LABEL(ashr_6):
> - pslldq $10, %xmm2
> - TOLOWER (%xmm1, %xmm2)
> - pcmpeqb %xmm1, %xmm2
> - psubb %xmm0, %xmm2
> - pmovmskb %xmm2, %r9d
> - shr %cl, %edx
> - shr %cl, %r9d
> - sub %r9d, %edx
> - jnz LABEL(less32bytes)
> - movdqa (%rdi), %xmm3
> -
> - UPDATE_STRNCMP_COUNTER
> -
> - mov $16, %rcx /* index for loads */
> - mov $6, %r9d /* byte position left over from less32bytes case */
> - /*
> - * Setup %r10 value allows us to detect crossing a page boundary.
> - * When %r10 goes positive we have crossed a page boundary and
> - * need to do a nibble.
> - */
> - lea 6(%rdi), %r10
> - and $0xfff, %r10 /* offset into 4K page */
> - sub $0x1000, %r10 /* subtract 4K pagesize */
> - mov %rcx, %rdx /* only for offset of sse4 instruction loop*/
> -
> - .p2align 4
> -LABEL(loop_ashr_6_use):
> - add $16, %r10
> - jg LABEL(nibble_ashr_6_use)
> -
> -LABEL(nibble_ashr_6_restart_use):
> - movdqa (%rdi, %rdx), %xmm0
> - palignr $6, -16(%rdi, %rdx), %xmm0
> -#if !defined USE_AS_STRCASECMP_L && !defined USE_AS_STRNCASECMP_L
> - pcmpistri $0x1a,(%rsi,%rdx), %xmm0
> -#else
> - movdqa (%rsi,%rdx), %xmm1
> - TOLOWER (%xmm0, %xmm1)
> - pcmpistri $0x1a, %xmm1, %xmm0
> -#endif
> - jbe LABEL(exit_use)
> -#if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L
> - sub $16, %r11
> - jbe LABEL(strcmp_exitz)
> -#endif
> -
> - add $16, %rdx
> - add $16, %r10
> - jg LABEL(nibble_ashr_6_use)
> -
> - movdqa (%rdi, %rdx), %xmm0
> - palignr $6, -16(%rdi, %rdx), %xmm0
> -#if !defined USE_AS_STRCASECMP_L && !defined USE_AS_STRNCASECMP_L
> - pcmpistri $0x1a,(%rsi,%rdx), %xmm0
> -#else
> - movdqa (%rsi,%rdx), %xmm1
> - TOLOWER (%xmm0, %xmm1)
> - pcmpistri $0x1a, %xmm1, %xmm0
> -#endif
> - jbe LABEL(exit_use)
> -#if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L
> - sub $16, %r11
> - jbe LABEL(strcmp_exitz)
> -#endif
> - add $16, %rdx
> - jmp LABEL(loop_ashr_6_use)
> -
> - .p2align 4
> -LABEL(nibble_ashr_6_use):
> - sub $0x1000, %r10
> - movdqa -16(%rdi, %rdx), %xmm0
> - psrldq $6, %xmm0
> - pcmpistri $0x3a,%xmm0, %xmm0
> -#if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L
> - cmp %r11, %rcx
> - jae LABEL(nibble_ashr_exit_use)
> -#endif
> - cmp $9, %ecx
> - ja LABEL(nibble_ashr_6_restart_use)
> -
> - jmp LABEL(nibble_ashr_exit_use)
> -
> -/*
> - * The following cases will be handled by ashr_7
> - * rcx(offset of rsi) rax(offset of rdi) relative offset corresponding case
> - * n(9~15) n - 9 6(15 +(n - 9) - n) ashr_7
> - */
> - .p2align 4
> -LABEL(ashr_7):
> - pslldq $9, %xmm2
> - TOLOWER (%xmm1, %xmm2)
> - pcmpeqb %xmm1, %xmm2
> - psubb %xmm0, %xmm2
> - pmovmskb %xmm2, %r9d
> - shr %cl, %edx
> - shr %cl, %r9d
> - sub %r9d, %edx
> - jnz LABEL(less32bytes)
> - movdqa (%rdi), %xmm3
> -
> - UPDATE_STRNCMP_COUNTER
> -
> - mov $16, %rcx /* index for loads */
> - mov $7, %r9d /* byte position left over from less32bytes case */
> - /*
> - * Setup %r10 value allows us to detect crossing a page boundary.
> - * When %r10 goes positive we have crossed a page boundary and
> - * need to do a nibble.
> - */
> - lea 7(%rdi), %r10
> - and $0xfff, %r10 /* offset into 4K page */
> - sub $0x1000, %r10 /* subtract 4K pagesize */
> - mov %rcx, %rdx /* only for offset of sse4 instruction loop*/
> -
> - .p2align 4
> -LABEL(loop_ashr_7_use):
> - add $16, %r10
> - jg LABEL(nibble_ashr_7_use)
> -
> -LABEL(nibble_ashr_7_restart_use):
> - movdqa (%rdi, %rdx), %xmm0
> - palignr $7, -16(%rdi, %rdx), %xmm0
> -#if !defined USE_AS_STRCASECMP_L && !defined USE_AS_STRNCASECMP_L
> - pcmpistri $0x1a,(%rsi,%rdx), %xmm0
> -#else
> - movdqa (%rsi,%rdx), %xmm1
> - TOLOWER (%xmm0, %xmm1)
> - pcmpistri $0x1a, %xmm1, %xmm0
> -#endif
> - jbe LABEL(exit_use)
> -#if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L
> - sub $16, %r11
> - jbe LABEL(strcmp_exitz)
> -#endif
> -
> - add $16, %rdx
> - add $16, %r10
> - jg LABEL(nibble_ashr_7_use)
> -
> - movdqa (%rdi, %rdx), %xmm0
> - palignr $7, -16(%rdi, %rdx), %xmm0
> -#if !defined USE_AS_STRCASECMP_L && !defined USE_AS_STRNCASECMP_L
> - pcmpistri $0x1a,(%rsi,%rdx), %xmm0
> -#else
> - movdqa (%rsi,%rdx), %xmm1
> - TOLOWER (%xmm0, %xmm1)
> - pcmpistri $0x1a, %xmm1, %xmm0
> -#endif
> - jbe LABEL(exit_use)
> -#if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L
> - sub $16, %r11
> - jbe LABEL(strcmp_exitz)
> -#endif
> - add $16, %rdx
> - jmp LABEL(loop_ashr_7_use)
> -
> - .p2align 4
> -LABEL(nibble_ashr_7_use):
> - sub $0x1000, %r10
> - movdqa -16(%rdi, %rdx), %xmm0
> - psrldq $7, %xmm0
> - pcmpistri $0x3a,%xmm0, %xmm0
> -#if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L
> - cmp %r11, %rcx
> - jae LABEL(nibble_ashr_exit_use)
> -#endif
> - cmp $8, %ecx
> - ja LABEL(nibble_ashr_7_restart_use)
> -
> - jmp LABEL(nibble_ashr_exit_use)
> -
> -/*
> - * The following cases will be handled by ashr_8
> - * rcx(offset of rsi) rax(offset of rdi) relative offset corresponding case
> - * n(8~15) n - 8 7(15 +(n - 8) - n) ashr_8
> - */
> - .p2align 4
> -LABEL(ashr_8):
> - pslldq $8, %xmm2
> - TOLOWER (%xmm1, %xmm2)
> - pcmpeqb %xmm1, %xmm2
> - psubb %xmm0, %xmm2
> - pmovmskb %xmm2, %r9d
> - shr %cl, %edx
> - shr %cl, %r9d
> - sub %r9d, %edx
> - jnz LABEL(less32bytes)
> - movdqa (%rdi), %xmm3
> -
> - UPDATE_STRNCMP_COUNTER
> -
> - mov $16, %rcx /* index for loads */
> - mov $8, %r9d /* byte position left over from less32bytes case */
> - /*
> - * Setup %r10 value allows us to detect crossing a page boundary.
> - * When %r10 goes positive we have crossed a page boundary and
> - * need to do a nibble.
> - */
> - lea 8(%rdi), %r10
> - and $0xfff, %r10 /* offset into 4K page */
> - sub $0x1000, %r10 /* subtract 4K pagesize */
> - mov %rcx, %rdx /* only for offset of sse4 instruction loop*/
> -
> - .p2align 4
> -LABEL(loop_ashr_8_use):
> - add $16, %r10
> - jg LABEL(nibble_ashr_8_use)
> -
> -LABEL(nibble_ashr_8_restart_use):
> - movdqa (%rdi, %rdx), %xmm0
> - palignr $8, -16(%rdi, %rdx), %xmm0
> -#if !defined USE_AS_STRCASECMP_L && !defined USE_AS_STRNCASECMP_L
> - pcmpistri $0x1a, (%rsi,%rdx), %xmm0
> -#else
> - movdqa (%rsi,%rdx), %xmm1
> - TOLOWER (%xmm0, %xmm1)
> - pcmpistri $0x1a, %xmm1, %xmm0
> -#endif
> - jbe LABEL(exit_use)
> -#if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L
> - sub $16, %r11
> - jbe LABEL(strcmp_exitz)
> -#endif
> -
> - add $16, %rdx
> - add $16, %r10
> - jg LABEL(nibble_ashr_8_use)
> -
> - movdqa (%rdi, %rdx), %xmm0
> - palignr $8, -16(%rdi, %rdx), %xmm0
> -#if !defined USE_AS_STRCASECMP_L && !defined USE_AS_STRNCASECMP_L
> - pcmpistri $0x1a, (%rsi,%rdx), %xmm0
> -#else
> - movdqa (%rsi,%rdx), %xmm1
> - TOLOWER (%xmm0, %xmm1)
> - pcmpistri $0x1a, %xmm1, %xmm0
> -#endif
> - jbe LABEL(exit_use)
> -#if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L
> - sub $16, %r11
> - jbe LABEL(strcmp_exitz)
> -#endif
> - add $16, %rdx
> - jmp LABEL(loop_ashr_8_use)
> -
> - .p2align 4
> -LABEL(nibble_ashr_8_use):
> - sub $0x1000, %r10
> - movdqa -16(%rdi, %rdx), %xmm0
> - psrldq $8, %xmm0
> - pcmpistri $0x3a,%xmm0, %xmm0
> -#if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L
> - cmp %r11, %rcx
> - jae LABEL(nibble_ashr_exit_use)
> -#endif
> - cmp $7, %ecx
> - ja LABEL(nibble_ashr_8_restart_use)
> -
> - jmp LABEL(nibble_ashr_exit_use)
> -
> -/*
> - * The following cases will be handled by ashr_9
> - * rcx(offset of rsi) rax(offset of rdi) relative offset corresponding case
> - * n(7~15) n - 7 8(15 +(n - 7) - n) ashr_9
> - */
> - .p2align 4
> -LABEL(ashr_9):
> - pslldq $7, %xmm2
> - TOLOWER (%xmm1, %xmm2)
> - pcmpeqb %xmm1, %xmm2
> - psubb %xmm0, %xmm2
> - pmovmskb %xmm2, %r9d
> - shr %cl, %edx
> - shr %cl, %r9d
> - sub %r9d, %edx
> - jnz LABEL(less32bytes)
> - movdqa (%rdi), %xmm3
> -
> - UPDATE_STRNCMP_COUNTER
> -
> - mov $16, %rcx /* index for loads */
> - mov $9, %r9d /* byte position left over from less32bytes case */
> - /*
> - * Setup %r10 value allows us to detect crossing a page boundary.
> - * When %r10 goes positive we have crossed a page boundary and
> - * need to do a nibble.
> - */
> - lea 9(%rdi), %r10
> - and $0xfff, %r10 /* offset into 4K page */
> - sub $0x1000, %r10 /* subtract 4K pagesize */
> - mov %rcx, %rdx /* only for offset of sse4 instruction loop*/
> -
> - .p2align 4
> -LABEL(loop_ashr_9_use):
> - add $16, %r10
> - jg LABEL(nibble_ashr_9_use)
> -
> -LABEL(nibble_ashr_9_restart_use):
> - movdqa (%rdi, %rdx), %xmm0
> -
> - palignr $9, -16(%rdi, %rdx), %xmm0
> -#if !defined USE_AS_STRCASECMP_L && !defined USE_AS_STRNCASECMP_L
> - pcmpistri $0x1a, (%rsi,%rdx), %xmm0
> -#else
> - movdqa (%rsi,%rdx), %xmm1
> - TOLOWER (%xmm0, %xmm1)
> - pcmpistri $0x1a, %xmm1, %xmm0
> -#endif
> - jbe LABEL(exit_use)
> -#if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L
> - sub $16, %r11
> - jbe LABEL(strcmp_exitz)
> -#endif
> -
> - add $16, %rdx
> - add $16, %r10
> - jg LABEL(nibble_ashr_9_use)
> -
> - movdqa (%rdi, %rdx), %xmm0
> - palignr $9, -16(%rdi, %rdx), %xmm0
> -#if !defined USE_AS_STRCASECMP_L && !defined USE_AS_STRNCASECMP_L
> - pcmpistri $0x1a, (%rsi,%rdx), %xmm0
> -#else
> - movdqa (%rsi,%rdx), %xmm1
> - TOLOWER (%xmm0, %xmm1)
> - pcmpistri $0x1a, %xmm1, %xmm0
> -#endif
> - jbe LABEL(exit_use)
> -#if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L
> - sub $16, %r11
> - jbe LABEL(strcmp_exitz)
> -#endif
> - add $16, %rdx
> - jmp LABEL(loop_ashr_9_use)
> -
> - .p2align 4
> -LABEL(nibble_ashr_9_use):
> - sub $0x1000, %r10
> - movdqa -16(%rdi, %rdx), %xmm0
> - psrldq $9, %xmm0
> - pcmpistri $0x3a,%xmm0, %xmm0
> -#if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L
> - cmp %r11, %rcx
> - jae LABEL(nibble_ashr_exit_use)
> -#endif
> - cmp $6, %ecx
> - ja LABEL(nibble_ashr_9_restart_use)
> -
> - jmp LABEL(nibble_ashr_exit_use)
> -
> -/*
> - * The following cases will be handled by ashr_10
> - * rcx(offset of rsi) rax(offset of rdi) relative offset corresponding case
> - * n(6~15) n - 6 9(15 +(n - 6) - n) ashr_10
> - */
> - .p2align 4
> -LABEL(ashr_10):
> - pslldq $6, %xmm2
> - TOLOWER (%xmm1, %xmm2)
> - pcmpeqb %xmm1, %xmm2
> - psubb %xmm0, %xmm2
> - pmovmskb %xmm2, %r9d
> - shr %cl, %edx
> - shr %cl, %r9d
> - sub %r9d, %edx
> - jnz LABEL(less32bytes)
> - movdqa (%rdi), %xmm3
> -
> - UPDATE_STRNCMP_COUNTER
> -
> - mov $16, %rcx /* index for loads */
> - mov $10, %r9d /* byte position left over from less32bytes case */
> - /*
> - * Setup %r10 value allows us to detect crossing a page boundary.
> - * When %r10 goes positive we have crossed a page boundary and
> - * need to do a nibble.
> - */
> - lea 10(%rdi), %r10
> - and $0xfff, %r10 /* offset into 4K page */
> - sub $0x1000, %r10 /* subtract 4K pagesize */
> - mov %rcx, %rdx /* only for offset of sse4 instruction loop*/
> -
> - .p2align 4
> -LABEL(loop_ashr_10_use):
> - add $16, %r10
> - jg LABEL(nibble_ashr_10_use)
> -
> -LABEL(nibble_ashr_10_restart_use):
> - movdqa (%rdi, %rdx), %xmm0
> - palignr $10, -16(%rdi, %rdx), %xmm0
> -#if !defined USE_AS_STRCASECMP_L && !defined USE_AS_STRNCASECMP_L
> - pcmpistri $0x1a, (%rsi,%rdx), %xmm0
> -#else
> - movdqa (%rsi,%rdx), %xmm1
> - TOLOWER (%xmm0, %xmm1)
> - pcmpistri $0x1a, %xmm1, %xmm0
> -#endif
> - jbe LABEL(exit_use)
> -#if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L
> - sub $16, %r11
> - jbe LABEL(strcmp_exitz)
> -#endif
> -
> - add $16, %rdx
> - add $16, %r10
> - jg LABEL(nibble_ashr_10_use)
> -
> - movdqa (%rdi, %rdx), %xmm0
> - palignr $10, -16(%rdi, %rdx), %xmm0
> -#if !defined USE_AS_STRCASECMP_L && !defined USE_AS_STRNCASECMP_L
> - pcmpistri $0x1a, (%rsi,%rdx), %xmm0
> -#else
> - movdqa (%rsi,%rdx), %xmm1
> - TOLOWER (%xmm0, %xmm1)
> - pcmpistri $0x1a, %xmm1, %xmm0
> -#endif
> - jbe LABEL(exit_use)
> -#if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L
> - sub $16, %r11
> - jbe LABEL(strcmp_exitz)
> -#endif
> - add $16, %rdx
> - jmp LABEL(loop_ashr_10_use)
> -
> - .p2align 4
> -LABEL(nibble_ashr_10_use):
> - sub $0x1000, %r10
> - movdqa -16(%rdi, %rdx), %xmm0
> - psrldq $10, %xmm0
> - pcmpistri $0x3a,%xmm0, %xmm0
> -#if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L
> - cmp %r11, %rcx
> - jae LABEL(nibble_ashr_exit_use)
> -#endif
> - cmp $5, %ecx
> - ja LABEL(nibble_ashr_10_restart_use)
> -
> - jmp LABEL(nibble_ashr_exit_use)
> -
> -/*
> - * The following cases will be handled by ashr_11
> - * rcx(offset of rsi) rax(offset of rdi) relative offset corresponding case
> - * n(5~15) n - 5 10(15 +(n - 5) - n) ashr_11
> - */
> - .p2align 4
> -LABEL(ashr_11):
> - pslldq $5, %xmm2
> - TOLOWER (%xmm1, %xmm2)
> - pcmpeqb %xmm1, %xmm2
> - psubb %xmm0, %xmm2
> - pmovmskb %xmm2, %r9d
> - shr %cl, %edx
> - shr %cl, %r9d
> - sub %r9d, %edx
> - jnz LABEL(less32bytes)
> - movdqa (%rdi), %xmm3
> -
> - UPDATE_STRNCMP_COUNTER
> -
> - mov $16, %rcx /* index for loads */
> - mov $11, %r9d /* byte position left over from less32bytes case */
> - /*
> - * Setup %r10 value allows us to detect crossing a page boundary.
> - * When %r10 goes positive we have crossed a page boundary and
> - * need to do a nibble.
> - */
> - lea 11(%rdi), %r10
> - and $0xfff, %r10 /* offset into 4K page */
> - sub $0x1000, %r10 /* subtract 4K pagesize */
> - mov %rcx, %rdx /* only for offset of sse4 instruction loop*/
> -
> - .p2align 4
> -LABEL(loop_ashr_11_use):
> - add $16, %r10
> - jg LABEL(nibble_ashr_11_use)
> -
> -LABEL(nibble_ashr_11_restart_use):
> - movdqa (%rdi, %rdx), %xmm0
> - palignr $11, -16(%rdi, %rdx), %xmm0
> -#if !defined USE_AS_STRCASECMP_L && !defined USE_AS_STRNCASECMP_L
> - pcmpistri $0x1a, (%rsi,%rdx), %xmm0
> -#else
> - movdqa (%rsi,%rdx), %xmm1
> - TOLOWER (%xmm0, %xmm1)
> - pcmpistri $0x1a, %xmm1, %xmm0
> -#endif
> - jbe LABEL(exit_use)
> -#if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L
> - sub $16, %r11
> - jbe LABEL(strcmp_exitz)
> -#endif
> -
> - add $16, %rdx
> - add $16, %r10
> - jg LABEL(nibble_ashr_11_use)
> -
> - movdqa (%rdi, %rdx), %xmm0
> - palignr $11, -16(%rdi, %rdx), %xmm0
> -#if !defined USE_AS_STRCASECMP_L && !defined USE_AS_STRNCASECMP_L
> - pcmpistri $0x1a, (%rsi,%rdx), %xmm0
> -#else
> - movdqa (%rsi,%rdx), %xmm1
> - TOLOWER (%xmm0, %xmm1)
> - pcmpistri $0x1a, %xmm1, %xmm0
> -#endif
> - jbe LABEL(exit_use)
> -#if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L
> - sub $16, %r11
> - jbe LABEL(strcmp_exitz)
> -#endif
> - add $16, %rdx
> - jmp LABEL(loop_ashr_11_use)
> -
> - .p2align 4
> -LABEL(nibble_ashr_11_use):
> - sub $0x1000, %r10
> - movdqa -16(%rdi, %rdx), %xmm0
> - psrldq $11, %xmm0
> - pcmpistri $0x3a,%xmm0, %xmm0
> -#if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L
> - cmp %r11, %rcx
> - jae LABEL(nibble_ashr_exit_use)
> -#endif
> - cmp $4, %ecx
> - ja LABEL(nibble_ashr_11_restart_use)
> -
> - jmp LABEL(nibble_ashr_exit_use)
> -
> -/*
> - * The following cases will be handled by ashr_12
> - * rcx(offset of rsi) rax(offset of rdi) relative offset corresponding case
> - * n(4~15) n - 4 11(15 +(n - 4) - n) ashr_12
> - */
> - .p2align 4
> -LABEL(ashr_12):
> - pslldq $4, %xmm2
> - TOLOWER (%xmm1, %xmm2)
> - pcmpeqb %xmm1, %xmm2
> - psubb %xmm0, %xmm2
> - pmovmskb %xmm2, %r9d
> - shr %cl, %edx
> - shr %cl, %r9d
> - sub %r9d, %edx
> - jnz LABEL(less32bytes)
> - movdqa (%rdi), %xmm3
> -
> - UPDATE_STRNCMP_COUNTER
> -
> - mov $16, %rcx /* index for loads */
> - mov $12, %r9d /* byte position left over from less32bytes case */
> - /*
> - * Setup %r10 value allows us to detect crossing a page boundary.
> - * When %r10 goes positive we have crossed a page boundary and
> - * need to do a nibble.
> - */
> - lea 12(%rdi), %r10
> - and $0xfff, %r10 /* offset into 4K page */
> - sub $0x1000, %r10 /* subtract 4K pagesize */
> - mov %rcx, %rdx /* only for offset of sse4 instruction loop*/
> -
> - .p2align 4
> -LABEL(loop_ashr_12_use):
> - add $16, %r10
> - jg LABEL(nibble_ashr_12_use)
> -
> -LABEL(nibble_ashr_12_restart_use):
> - movdqa (%rdi, %rdx), %xmm0
> - palignr $12, -16(%rdi, %rdx), %xmm0
> -#if !defined USE_AS_STRCASECMP_L && !defined USE_AS_STRNCASECMP_L
> - pcmpistri $0x1a, (%rsi,%rdx), %xmm0
> -#else
> - movdqa (%rsi,%rdx), %xmm1
> - TOLOWER (%xmm0, %xmm1)
> - pcmpistri $0x1a, %xmm1, %xmm0
> -#endif
> - jbe LABEL(exit_use)
> -#if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L
> - sub $16, %r11
> - jbe LABEL(strcmp_exitz)
> -#endif
> -
> - add $16, %rdx
> - add $16, %r10
> - jg LABEL(nibble_ashr_12_use)
> -
> - movdqa (%rdi, %rdx), %xmm0
> - palignr $12, -16(%rdi, %rdx), %xmm0
> -#if !defined USE_AS_STRCASECMP_L && !defined USE_AS_STRNCASECMP_L
> - pcmpistri $0x1a, (%rsi,%rdx), %xmm0
> -#else
> - movdqa (%rsi,%rdx), %xmm1
> - TOLOWER (%xmm0, %xmm1)
> - pcmpistri $0x1a, %xmm1, %xmm0
> -#endif
> - jbe LABEL(exit_use)
> -#if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L
> - sub $16, %r11
> - jbe LABEL(strcmp_exitz)
> -#endif
> - add $16, %rdx
> - jmp LABEL(loop_ashr_12_use)
> -
> - .p2align 4
> -LABEL(nibble_ashr_12_use):
> - sub $0x1000, %r10
> - movdqa -16(%rdi, %rdx), %xmm0
> - psrldq $12, %xmm0
> - pcmpistri $0x3a,%xmm0, %xmm0
> -#if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L
> - cmp %r11, %rcx
> - jae LABEL(nibble_ashr_exit_use)
> -#endif
> - cmp $3, %ecx
> - ja LABEL(nibble_ashr_12_restart_use)
> -
> - jmp LABEL(nibble_ashr_exit_use)
> -
> -/*
> - * The following cases will be handled by ashr_13
> - * rcx(offset of rsi) rax(offset of rdi) relative offset corresponding case
> - * n(3~15) n - 3 12(15 +(n - 3) - n) ashr_13
> - */
> - .p2align 4
> -LABEL(ashr_13):
> - pslldq $3, %xmm2
> - TOLOWER (%xmm1, %xmm2)
> - pcmpeqb %xmm1, %xmm2
> - psubb %xmm0, %xmm2
> - pmovmskb %xmm2, %r9d
> - shr %cl, %edx
> - shr %cl, %r9d
> - sub %r9d, %edx
> - jnz LABEL(less32bytes)
> - movdqa (%rdi), %xmm3
> -
> - UPDATE_STRNCMP_COUNTER
> -
> - mov $16, %rcx /* index for loads */
> - mov $13, %r9d /* byte position left over from less32bytes case */
> - /*
> - * Setup %r10 value allows us to detect crossing a page boundary.
> - * When %r10 goes positive we have crossed a page boundary and
> - * need to do a nibble.
> - */
> - lea 13(%rdi), %r10
> - and $0xfff, %r10 /* offset into 4K page */
> - sub $0x1000, %r10 /* subtract 4K pagesize */
> -
> - mov %rcx, %rdx /* only for offset of sse4 instruction loop*/
> -
> - .p2align 4
> -LABEL(loop_ashr_13_use):
> - add $16, %r10
> - jg LABEL(nibble_ashr_13_use)
> -
> -LABEL(nibble_ashr_13_restart_use):
> - movdqa (%rdi, %rdx), %xmm0
> - palignr $13, -16(%rdi, %rdx), %xmm0
> -#if !defined USE_AS_STRCASECMP_L && !defined USE_AS_STRNCASECMP_L
> - pcmpistri $0x1a, (%rsi,%rdx), %xmm0
> -#else
> - movdqa (%rsi,%rdx), %xmm1
> - TOLOWER (%xmm0, %xmm1)
> - pcmpistri $0x1a, %xmm1, %xmm0
> -#endif
> - jbe LABEL(exit_use)
> -#if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L
> - sub $16, %r11
> - jbe LABEL(strcmp_exitz)
> -#endif
> -
> - add $16, %rdx
> - add $16, %r10
> - jg LABEL(nibble_ashr_13_use)
> -
> - movdqa (%rdi, %rdx), %xmm0
> - palignr $13, -16(%rdi, %rdx), %xmm0
> -#if !defined USE_AS_STRCASECMP_L && !defined USE_AS_STRNCASECMP_L
> - pcmpistri $0x1a, (%rsi,%rdx), %xmm0
> -#else
> - movdqa (%rsi,%rdx), %xmm1
> - TOLOWER (%xmm0, %xmm1)
> - pcmpistri $0x1a, %xmm1, %xmm0
> -#endif
> - jbe LABEL(exit_use)
> -#if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L
> - sub $16, %r11
> - jbe LABEL(strcmp_exitz)
> -#endif
> - add $16, %rdx
> - jmp LABEL(loop_ashr_13_use)
> -
> - .p2align 4
> -LABEL(nibble_ashr_13_use):
> - sub $0x1000, %r10
> - movdqa -16(%rdi, %rdx), %xmm0
> - psrldq $13, %xmm0
> - pcmpistri $0x3a,%xmm0, %xmm0
> -#if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L
> - cmp %r11, %rcx
> - jae LABEL(nibble_ashr_exit_use)
> -#endif
> - cmp $2, %ecx
> - ja LABEL(nibble_ashr_13_restart_use)
> -
> - jmp LABEL(nibble_ashr_exit_use)
> -
> -/*
> - * The following cases will be handled by ashr_14
> - * rcx(offset of rsi) rax(offset of rdi) relative offset corresponding case
> - * n(2~15) n - 2 13(15 +(n - 2) - n) ashr_14
> - */
> - .p2align 4
> -LABEL(ashr_14):
> - pslldq $2, %xmm2
> - TOLOWER (%xmm1, %xmm2)
> - pcmpeqb %xmm1, %xmm2
> - psubb %xmm0, %xmm2
> - pmovmskb %xmm2, %r9d
> - shr %cl, %edx
> - shr %cl, %r9d
> - sub %r9d, %edx
> - jnz LABEL(less32bytes)
> - movdqa (%rdi), %xmm3
> -
> - UPDATE_STRNCMP_COUNTER
> -
> - mov $16, %rcx /* index for loads */
> - mov $14, %r9d /* byte position left over from less32bytes case */
> - /*
> - * Setup %r10 value allows us to detect crossing a page boundary.
> - * When %r10 goes positive we have crossed a page boundary and
> - * need to do a nibble.
> - */
> - lea 14(%rdi), %r10
> - and $0xfff, %r10 /* offset into 4K page */
> - sub $0x1000, %r10 /* subtract 4K pagesize */
> -
> - mov %rcx, %rdx /* only for offset of sse4 instruction loop*/
> -
> - .p2align 4
> -LABEL(loop_ashr_14_use):
> - add $16, %r10
> - jg LABEL(nibble_ashr_14_use)
> -
> -LABEL(nibble_ashr_14_restart_use):
> - movdqa (%rdi, %rdx), %xmm0
> - palignr $14, -16(%rdi, %rdx), %xmm0
> -#if !defined USE_AS_STRCASECMP_L && !defined USE_AS_STRNCASECMP_L
> - pcmpistri $0x1a, (%rsi,%rdx), %xmm0
> -#else
> - movdqa (%rsi,%rdx), %xmm1
> - TOLOWER (%xmm0, %xmm1)
> - pcmpistri $0x1a, %xmm1, %xmm0
> -#endif
> - jbe LABEL(exit_use)
> -#if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L
> - sub $16, %r11
> - jbe LABEL(strcmp_exitz)
> -#endif
> -
> - add $16, %rdx
> - add $16, %r10
> - jg LABEL(nibble_ashr_14_use)
> -
> - movdqa (%rdi, %rdx), %xmm0
> - palignr $14, -16(%rdi, %rdx), %xmm0
> -#if !defined USE_AS_STRCASECMP_L && !defined USE_AS_STRNCASECMP_L
> - pcmpistri $0x1a, (%rsi,%rdx), %xmm0
> -#else
> - movdqa (%rsi,%rdx), %xmm1
> - TOLOWER (%xmm0, %xmm1)
> - pcmpistri $0x1a, %xmm1, %xmm0
> -#endif
> - jbe LABEL(exit_use)
> -#if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L
> - sub $16, %r11
> - jbe LABEL(strcmp_exitz)
> -#endif
> - add $16, %rdx
> - jmp LABEL(loop_ashr_14_use)
> -
> - .p2align 4
> -LABEL(nibble_ashr_14_use):
> - sub $0x1000, %r10
> - movdqa -16(%rdi, %rdx), %xmm0
> - psrldq $14, %xmm0
> - pcmpistri $0x3a,%xmm0, %xmm0
> -#if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L
> - cmp %r11, %rcx
> - jae LABEL(nibble_ashr_exit_use)
> -#endif
> - cmp $1, %ecx
> - ja LABEL(nibble_ashr_14_restart_use)
> -
> - jmp LABEL(nibble_ashr_exit_use)
> -
> -/*
> - * The following cases will be handled by ashr_15
> - * rcx(offset of rsi) rax(offset of rdi) relative offset corresponding case
> - * n(1~15) n - 1 14(15 +(n - 1) - n) ashr_15
> - */
> - .p2align 4
> -LABEL(ashr_15):
> - pslldq $1, %xmm2
> - TOLOWER (%xmm1, %xmm2)
> - pcmpeqb %xmm1, %xmm2
> - psubb %xmm0, %xmm2
> - pmovmskb %xmm2, %r9d
> - shr %cl, %edx
> - shr %cl, %r9d
> - sub %r9d, %edx
> - jnz LABEL(less32bytes)
> -
> - movdqa (%rdi), %xmm3
> -
> - UPDATE_STRNCMP_COUNTER
> -
> - mov $16, %rcx /* index for loads */
> - mov $15, %r9d /* byte position left over from less32bytes case */
> - /*
> - * Setup %r10 value allows us to detect crossing a page boundary.
> - * When %r10 goes positive we have crossed a page boundary and
> - * need to do a nibble.
> - */
> - lea 15(%rdi), %r10
> - and $0xfff, %r10 /* offset into 4K page */
> -
> - sub $0x1000, %r10 /* subtract 4K pagesize */
> -
> - mov %rcx, %rdx /* only for offset of sse4 instruction loop*/
> -
> - .p2align 4
> -LABEL(loop_ashr_15_use):
> - add $16, %r10
> - jg LABEL(nibble_ashr_15_use)
> -
> -LABEL(nibble_ashr_15_restart_use):
> - movdqa (%rdi, %rdx), %xmm0
> - palignr $15, -16(%rdi, %rdx), %xmm0
> -#if !defined USE_AS_STRCASECMP_L && !defined USE_AS_STRNCASECMP_L
> - pcmpistri $0x1a, (%rsi,%rdx), %xmm0
> -#else
> - movdqa (%rsi,%rdx), %xmm1
> - TOLOWER (%xmm0, %xmm1)
> - pcmpistri $0x1a, %xmm1, %xmm0
> -#endif
> - jbe LABEL(exit_use)
> -#if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L
> - sub $16, %r11
> - jbe LABEL(strcmp_exitz)
> -#endif
> -
> - add $16, %rdx
> - add $16, %r10
> - jg LABEL(nibble_ashr_15_use)
> -
> - movdqa (%rdi, %rdx), %xmm0
> - palignr $15, -16(%rdi, %rdx), %xmm0
> -#if !defined USE_AS_STRCASECMP_L && !defined USE_AS_STRNCASECMP_L
> - pcmpistri $0x1a, (%rsi,%rdx), %xmm0
> -#else
> - movdqa (%rsi,%rdx), %xmm1
> - TOLOWER (%xmm0, %xmm1)
> - pcmpistri $0x1a, %xmm1, %xmm0
> -#endif
> - jbe LABEL(exit_use)
> -#if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L
> - sub $16, %r11
> - jbe LABEL(strcmp_exitz)
> -#endif
> - add $16, %rdx
> - jmp LABEL(loop_ashr_15_use)
> -
> - .p2align 4
> -LABEL(nibble_ashr_15_use):
> - sub $0x1000, %r10
> - movdqa -16(%rdi, %rdx), %xmm0
> - psrldq $15, %xmm0
> - pcmpistri $0x3a,%xmm0, %xmm0
> -#if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L
> - cmp %r11, %rcx
> - jae LABEL(nibble_ashr_exit_use)
> -#endif
> - cmp $0, %ecx
> - ja LABEL(nibble_ashr_15_restart_use)
> -
> -LABEL(nibble_ashr_exit_use):
> -#if !defined USE_AS_STRCASECMP_L && !defined USE_AS_STRNCASECMP_L
> - pcmpistri $0x1a,(%rsi,%rdx), %xmm0
> -#else
> - movdqa (%rsi,%rdx), %xmm1
> - TOLOWER (%xmm0, %xmm1)
> - pcmpistri $0x1a, %xmm1, %xmm0
> -#endif
> - .p2align 4
> -LABEL(exit_use):
> - jnc LABEL(strcmp_exitz)
> -#if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L
> - sub %rcx, %r11
> - jbe LABEL(strcmp_exitz)
> -#endif
> - add %rcx, %rdx
> - lea -16(%rdi, %r9), %rdi
> - movzbl (%rdi, %rdx), %eax
> - movzbl (%rsi, %rdx), %edx
> - test %r8d, %r8d
> - jz LABEL(ret_use)
> - xchg %eax, %edx
> -LABEL(ret_use):
> -#if defined USE_AS_STRCASECMP_L || defined USE_AS_STRNCASECMP_L
> - leaq _nl_C_LC_CTYPE_tolower+128*4(%rip), %rcx
> - movl (%rcx,%rdx,4), %edx
> - movl (%rcx,%rax,4), %eax
> -#endif
> -
> - sub %edx, %eax
> - ret
> -
> -LABEL(less32bytes):
> - lea (%rdi, %rax), %rdi /* locate the exact address for first operand(rdi) */
> - lea (%rsi, %rcx), %rsi /* locate the exact address for second operand(rsi) */
> - test %r8d, %r8d
> - jz LABEL(ret)
> - xchg %rsi, %rdi /* recover original order according to flag(%r8d) */
> -
> - .p2align 4
> -LABEL(ret):
> -LABEL(less16bytes):
> - bsf %rdx, %rdx /* find and store bit index in %rdx */
> -
> -#if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L
> - sub %rdx, %r11
> - jbe LABEL(strcmp_exitz)
> -#endif
> - movzbl (%rsi, %rdx), %ecx
> - movzbl (%rdi, %rdx), %eax
> -
> -#if defined USE_AS_STRCASECMP_L || defined USE_AS_STRNCASECMP_L
> - leaq _nl_C_LC_CTYPE_tolower+128*4(%rip), %rdx
> - movl (%rdx,%rcx,4), %ecx
> - movl (%rdx,%rax,4), %eax
> -#endif
> -
> - sub %ecx, %eax
> - ret
> -
> -LABEL(strcmp_exitz):
> - xor %eax, %eax
> - ret
> -
> - .p2align 4
> - // XXX Same as code above
> -LABEL(Byte0):
> - movzbl (%rsi), %ecx
> - movzbl (%rdi), %eax
> -
> -#if defined USE_AS_STRCASECMP_L || defined USE_AS_STRNCASECMP_L
> - leaq _nl_C_LC_CTYPE_tolower+128*4(%rip), %rdx
> - movl (%rdx,%rcx,4), %ecx
> - movl (%rdx,%rax,4), %eax
> -#endif
> -
> - sub %ecx, %eax
> - ret
> - cfi_endproc
> - .size STRCMP_SSE42, .-STRCMP_SSE42
> -
> -#undef UCLOW_reg
> -#undef UCHIGH_reg
> -#undef LCQWORD_reg
> -#undef TOLOWER
> -
> - /* Put all SSE 4.2 functions together. */
> - .section .rodata.SECTION,"a",@progbits
> - .p2align 3
> -LABEL(unaligned_table):
> - .int LABEL(ashr_1) - LABEL(unaligned_table)
> - .int LABEL(ashr_2) - LABEL(unaligned_table)
> - .int LABEL(ashr_3) - LABEL(unaligned_table)
> - .int LABEL(ashr_4) - LABEL(unaligned_table)
> - .int LABEL(ashr_5) - LABEL(unaligned_table)
> - .int LABEL(ashr_6) - LABEL(unaligned_table)
> - .int LABEL(ashr_7) - LABEL(unaligned_table)
> - .int LABEL(ashr_8) - LABEL(unaligned_table)
> - .int LABEL(ashr_9) - LABEL(unaligned_table)
> - .int LABEL(ashr_10) - LABEL(unaligned_table)
> - .int LABEL(ashr_11) - LABEL(unaligned_table)
> - .int LABEL(ashr_12) - LABEL(unaligned_table)
> - .int LABEL(ashr_13) - LABEL(unaligned_table)
> - .int LABEL(ashr_14) - LABEL(unaligned_table)
> - .int LABEL(ashr_15) - LABEL(unaligned_table)
> - .int LABEL(ashr_0) - LABEL(unaligned_table)
> -
> -#undef LABEL
> -#undef GLABEL
> -#undef SECTION
> -#undef movdqa
> -#undef movdqu
> -#undef pmovmskb
> -#undef pcmpistri
> -#undef psubb
> -#undef pcmpeqb
> -#undef psrldq
> -#undef pslldq
> -#undef palignr
> -#undef pxor
> -#undef D
> diff --git a/sysdeps/x86_64/multiarch/strcmp-sse4_2.S b/sysdeps/x86_64/multiarch/strcmp-sse4_2.S
> index 2c916bafa0..963e208ccb 100644
> --- a/sysdeps/x86_64/multiarch/strcmp-sse4_2.S
> +++ b/sysdeps/x86_64/multiarch/strcmp-sse4_2.S
> @@ -17,5 +17,1766 @@
> <https://www.gnu.org/licenses/>. */
>
> #if IS_IN (libc)
> -# include "strcmp-sse42.S"
> +# include <sysdep.h>
> +
> +# define STRCMP_ISA _sse42
> +# include "strcmp-naming.h"
> +
> +# if defined USE_AS_STRCASECMP_L || defined USE_AS_STRNCASECMP_L
> +# include "locale-defines.h"
> +# endif
> +
> +# if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L
> +/* Since the counter, %r11, is unsigned, we branch to strcmp_exitz
> + if the new counter > the old one or is 0. */
> +# define UPDATE_STRNCMP_COUNTER \
> + /* calculate left number to compare */ \
> + lea -16(%rcx, %r11), %r9; \
> + cmp %r9, %r11; \
> + jb LABEL(strcmp_exitz); \
> + test %r9, %r9; \
> + je LABEL(strcmp_exitz); \
> + mov %r9, %r11
> +# else
> +# define UPDATE_STRNCMP_COUNTER
> +# endif
> +
> +# define SECTION sse4.2
> +
> +# define LABEL(l) .L##l
> +
> +/* We use 0x1a:
> + _SIDD_SBYTE_OPS
> + | _SIDD_CMP_EQUAL_EACH
> + | _SIDD_NEGATIVE_POLARITY
> + | _SIDD_LEAST_SIGNIFICANT
> + on pcmpistri to find out if two 16byte data elements are the same
> + and the offset of the first different byte. There are 4 cases:
> +
> + 1. Both 16byte data elements are valid and identical.
> + 2. Both 16byte data elements have EOS and identical.
> + 3. Both 16byte data elements are valid and they differ at offset X.
> + 4. At least one 16byte data element has EOS at offset X. Two 16byte
> + data elements must differ at or before offset X.
> +
> + Here is the table of ECX, CFlag, ZFlag and SFlag for 4 cases:
> +
> + case ECX CFlag ZFlag SFlag
> + 1 16 0 0 0
> + 2 16 0 1 1
> + 3 X 1 0 0
> + 4 0 <= X 1 0/1 0/1
> +
> + We exit from the loop for cases 2, 3 and 4 with jbe which branches
> + when either CFlag or ZFlag is 1. If CFlag == 0, we return 0 for
> + case 2. */
> +
> + /* Put all SSE 4.2 functions together. */
> + .section .text.SECTION,"ax",@progbits
> + .align 16
> + .type STRCMP, @function
> + .globl STRCMP
> +# ifdef USE_AS_STRCASECMP_L
> +ENTRY (STRCASECMP)
> + movq __libc_tsd_LOCALE@gottpoff(%rip),%rax
> + mov %fs:(%rax),%RDX_LP
> +
> + /* Either 1 or 5 bytes (dependeing if CET is enabled). */
> + .p2align 4
> +END (STRCASECMP)
> + /* FALLTHROUGH to strcasecmp_l. */
> +# endif
> +# ifdef USE_AS_STRNCASECMP_L
> +ENTRY (STRCASECMP)
> + movq __libc_tsd_LOCALE@gottpoff(%rip),%rax
> + mov %fs:(%rax),%RCX_LP
> +
> + /* Either 1 or 5 bytes (dependeing if CET is enabled). */
> + .p2align 4
> +END (STRCASECMP)
> + /* FALLTHROUGH to strncasecmp_l. */
> +# endif
> +
> +
> +# define arg arg
> +
> +STRCMP:
> + cfi_startproc
> + _CET_ENDBR
> + CALL_MCOUNT
> +
> +/*
> + * This implementation uses SSE to compare up to 16 bytes at a time.
> + */
> +# ifdef USE_AS_STRCASECMP_L
> + /* We have to fall back on the C implementation for locales
> + with encodings not matching ASCII for single bytes. */
> +# if LOCALE_T___LOCALES != 0 || LC_CTYPE != 0
> + mov LOCALE_T___LOCALES+LC_CTYPE*LP_SIZE(%rdx), %RAX_LP
> +# else
> + mov (%rdx), %RAX_LP
> +# endif
> + testl $1, LOCALE_DATA_VALUES+_NL_CTYPE_NONASCII_CASE*SIZEOF_VALUES(%rax)
> + jne __strcasecmp_l_nonascii
> +# endif
> +# ifdef USE_AS_STRNCASECMP_L
> + /* We have to fall back on the C implementation for locales
> + with encodings not matching ASCII for single bytes. */
> +# if LOCALE_T___LOCALES != 0 || LC_CTYPE != 0
> + mov LOCALE_T___LOCALES+LC_CTYPE*LP_SIZE(%rcx), %RAX_LP
> +# else
> + mov (%rcx), %RAX_LP
> +# endif
> + testl $1, LOCALE_DATA_VALUES+_NL_CTYPE_NONASCII_CASE*SIZEOF_VALUES(%rax)
> + jne __strncasecmp_l_nonascii
> +# endif
> +
> +# if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L
> + test %RDX_LP, %RDX_LP
> + je LABEL(strcmp_exitz)
> + cmp $1, %RDX_LP
> + je LABEL(Byte0)
> + mov %RDX_LP, %R11_LP
> +# endif
> + mov %esi, %ecx
> + mov %edi, %eax
> +/* Use 64bit AND here to avoid long NOP padding. */
> + and $0x3f, %rcx /* rsi alignment in cache line */
> + and $0x3f, %rax /* rdi alignment in cache line */
> +# if defined USE_AS_STRCASECMP_L || defined USE_AS_STRNCASECMP_L
> + .section .rodata.cst16,"aM",@progbits,16
> + .align 16
> +LABEL(lcase_min):
> + .quad 0x3f3f3f3f3f3f3f3f
> + .quad 0x3f3f3f3f3f3f3f3f
> +LABEL(lcase_max):
> + .quad 0x9999999999999999
> + .quad 0x9999999999999999
> +LABEL(case_add):
> + .quad 0x2020202020202020
> + .quad 0x2020202020202020
> + .previous
> + movdqa LABEL(lcase_min)(%rip), %xmm4
> +# define LCASE_MIN_reg %xmm4
> + movdqa LABEL(lcase_max)(%rip), %xmm5
> +# define LCASE_MAX_reg %xmm5
> + movdqa LABEL(case_add)(%rip), %xmm6
> +# define CASE_ADD_reg %xmm6
> +# endif
> + cmp $0x30, %ecx
> + ja LABEL(crosscache)/* rsi: 16-byte load will cross cache line */
> + cmp $0x30, %eax
> + ja LABEL(crosscache)/* rdi: 16-byte load will cross cache line */
> + movdqu (%rdi), %xmm1
> + movdqu (%rsi), %xmm2
> +# if defined USE_AS_STRCASECMP_L || defined USE_AS_STRNCASECMP_L
> +# define TOLOWER(reg1, reg2) \
> + movdqa LCASE_MIN_reg, %xmm7; \
> + movdqa LCASE_MIN_reg, %xmm8; \
> + paddb reg1, %xmm7; \
> + paddb reg2, %xmm8; \
> + pcmpgtb LCASE_MAX_reg, %xmm7; \
> + pcmpgtb LCASE_MAX_reg, %xmm8; \
> + pandn CASE_ADD_reg, %xmm7; \
> + pandn CASE_ADD_reg, %xmm8; \
> + paddb %xmm7, reg1; \
> + paddb %xmm8, reg2
> +
> + TOLOWER (%xmm1, %xmm2)
> +# else
> +# define TOLOWER(reg1, reg2)
> +# endif
> + pxor %xmm0, %xmm0 /* clear %xmm0 for null char checks */
> + pcmpeqb %xmm1, %xmm0 /* Any null chars? */
> + pcmpeqb %xmm2, %xmm1 /* compare first 16 bytes for equality */
> + psubb %xmm0, %xmm1 /* packed sub of comparison results*/
> + pmovmskb %xmm1, %edx
> + sub $0xffff, %edx /* if first 16 bytes are same, edx == 0xffff */
> + jnz LABEL(less16bytes)/* If not, find different value or null char */
> +# if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L
> + sub $16, %r11
> + jbe LABEL(strcmp_exitz)/* finish comparison */
> +# endif
> + add $16, %rsi /* prepare to search next 16 bytes */
> + add $16, %rdi /* prepare to search next 16 bytes */
> +
> + /*
> + * Determine source and destination string offsets from 16-byte
> + * alignment. Use relative offset difference between the two to
> + * determine which case below to use.
> + */
> + .p2align 4
> +LABEL(crosscache):
> + and $0xfffffffffffffff0, %rsi /* force %rsi is 16 byte aligned */
> + and $0xfffffffffffffff0, %rdi /* force %rdi is 16 byte aligned */
> + mov $0xffff, %edx /* for equivalent offset */
> + xor %r8d, %r8d
> + and $0xf, %ecx /* offset of rsi */
> + and $0xf, %eax /* offset of rdi */
> + pxor %xmm0, %xmm0 /* clear %xmm0 for null char check */
> + cmp %eax, %ecx
> + je LABEL(ashr_0) /* rsi and rdi relative offset same */
> + ja LABEL(bigger)
> + mov %edx, %r8d /* r8d is offset flag for exit tail */
> + xchg %ecx, %eax
> + xchg %rsi, %rdi
> +LABEL(bigger):
> + movdqa (%rdi), %xmm2
> + movdqa (%rsi), %xmm1
> + lea 15(%rax), %r9
> + sub %rcx, %r9
> + lea LABEL(unaligned_table)(%rip), %r10
> + movslq (%r10, %r9,4), %r9
> + pcmpeqb %xmm1, %xmm0 /* Any null chars? */
> + lea (%r10, %r9), %r10
> + _CET_NOTRACK jmp *%r10 /* jump to corresponding case */
> +
> +/*
> + * The following cases will be handled by ashr_0
> + * rcx(offset of rsi) rax(offset of rdi) relative offset corresponding case
> + * n(0~15) n(0~15) 15(15+ n-n) ashr_0
> + */
> + .p2align 4
> +LABEL(ashr_0):
> +
> + movdqa (%rsi), %xmm1
> + pcmpeqb %xmm1, %xmm0 /* Any null chars? */
> +# if !defined USE_AS_STRCASECMP_L && !defined USE_AS_STRNCASECMP_L
> + pcmpeqb (%rdi), %xmm1 /* compare 16 bytes for equality */
> +# else
> + movdqa (%rdi), %xmm2
> + TOLOWER (%xmm1, %xmm2)
> + pcmpeqb %xmm2, %xmm1 /* compare 16 bytes for equality */
> +# endif
> + psubb %xmm0, %xmm1 /* packed sub of comparison results*/
> + pmovmskb %xmm1, %r9d
> + shr %cl, %edx /* adjust 0xffff for offset */
> + shr %cl, %r9d /* adjust for 16-byte offset */
> + sub %r9d, %edx
> + /*
> + * edx must be the same with r9d if in left byte (16-rcx) is equal to
> + * the start from (16-rax) and no null char was seen.
> + */
> + jne LABEL(less32bytes) /* mismatch or null char */
> + UPDATE_STRNCMP_COUNTER
> + mov $16, %rcx
> + mov $16, %r9
> +
> + /*
> + * Now both strings are aligned at 16-byte boundary. Loop over strings
> + * checking 32-bytes per iteration.
> + */
> + mov %rcx, %rdx /* only for offset of sse4 instruction loop*/
> + .p2align 4
> +LABEL(ashr_0_use):
> + movdqa (%rdi,%rdx), %xmm0
> +# if !defined USE_AS_STRCASECMP_L && !defined USE_AS_STRNCASECMP_L
> + pcmpistri $0x1a,(%rsi,%rdx), %xmm0
> +# else
> + movdqa (%rsi,%rdx), %xmm1
> + TOLOWER (%xmm0, %xmm1)
> + pcmpistri $0x1a, %xmm1, %xmm0
> +# endif
> + lea 16(%rdx), %rdx
> + jbe LABEL(ashr_0_exit_use)
> +# if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L
> + sub $16, %r11
> + jbe LABEL(strcmp_exitz)
> +# endif
> +
> + movdqa (%rdi,%rdx), %xmm0
> +# if !defined USE_AS_STRCASECMP_L && !defined USE_AS_STRNCASECMP_L
> + pcmpistri $0x1a,(%rsi,%rdx), %xmm0
> +# else
> + movdqa (%rsi,%rdx), %xmm1
> + TOLOWER (%xmm0, %xmm1)
> + pcmpistri $0x1a, %xmm1, %xmm0
> +# endif
> + lea 16(%rdx), %rdx
> + jbe LABEL(ashr_0_exit_use)
> +# if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L
> + sub $16, %r11
> + jbe LABEL(strcmp_exitz)
> +# endif
> + jmp LABEL(ashr_0_use)
> +
> +
> + .p2align 4
> +LABEL(ashr_0_exit_use):
> + jnc LABEL(strcmp_exitz)
> +# if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L
> + sub %rcx, %r11
> + jbe LABEL(strcmp_exitz)
> +# endif
> + lea -16(%rdx, %rcx), %rcx
> + movzbl (%rdi, %rcx), %eax
> + movzbl (%rsi, %rcx), %edx
> +# if defined USE_AS_STRCASECMP_L || defined USE_AS_STRNCASECMP_L
> + leaq _nl_C_LC_CTYPE_tolower+128*4(%rip), %rcx
> + movl (%rcx,%rax,4), %eax
> + movl (%rcx,%rdx,4), %edx
> +# endif
> + sub %edx, %eax
> + ret
> +
> +
> +
> +/*
> + * The following cases will be handled by ashr_1
> + * rcx(offset of rsi) rax(offset of rdi) relative offset corresponding case
> + * n(15) n -15 0(15 +(n-15) - n) ashr_1
> + */
> + .p2align 4
> +LABEL(ashr_1):
> + pslldq $15, %xmm2 /* shift first string to align with second */
> + TOLOWER (%xmm1, %xmm2)
> + pcmpeqb %xmm1, %xmm2 /* compare 16 bytes for equality */
> + psubb %xmm0, %xmm2 /* packed sub of comparison results*/
> + pmovmskb %xmm2, %r9d
> + shr %cl, %edx /* adjust 0xffff for offset */
> + shr %cl, %r9d /* adjust for 16-byte offset */
> + sub %r9d, %edx
> + jnz LABEL(less32bytes) /* mismatch or null char seen */
> + movdqa (%rdi), %xmm3
> + UPDATE_STRNCMP_COUNTER
> +
> + mov $16, %rcx /* index for loads*/
> + mov $1, %r9d /* byte position left over from less32bytes case */
> + /*
> + * Setup %r10 value allows us to detect crossing a page boundary.
> + * When %r10 goes positive we have crossed a page boundary and
> + * need to do a nibble.
> + */
> + lea 1(%rdi), %r10
> + and $0xfff, %r10 /* offset into 4K page */
> + sub $0x1000, %r10 /* subtract 4K pagesize */
> + mov %rcx, %rdx /* only for offset of sse4 instruction loop*/
> +
> + .p2align 4
> +LABEL(loop_ashr_1_use):
> + add $16, %r10
> + jg LABEL(nibble_ashr_1_use)
> +
> +LABEL(nibble_ashr_1_restart_use):
> + movdqa (%rdi, %rdx), %xmm0
> + palignr $1, -16(%rdi, %rdx), %xmm0
> +# if !defined USE_AS_STRCASECMP_L && !defined USE_AS_STRNCASECMP_L
> + pcmpistri $0x1a,(%rsi,%rdx), %xmm0
> +# else
> + movdqa (%rsi,%rdx), %xmm1
> + TOLOWER (%xmm0, %xmm1)
> + pcmpistri $0x1a, %xmm1, %xmm0
> +# endif
> + jbe LABEL(exit_use)
> +# if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L
> + sub $16, %r11
> + jbe LABEL(strcmp_exitz)
> +# endif
> +
> + add $16, %rdx
> + add $16, %r10
> + jg LABEL(nibble_ashr_1_use)
> +
> + movdqa (%rdi, %rdx), %xmm0
> + palignr $1, -16(%rdi, %rdx), %xmm0
> +# if !defined USE_AS_STRCASECMP_L && !defined USE_AS_STRNCASECMP_L
> + pcmpistri $0x1a,(%rsi,%rdx), %xmm0
> +# else
> + movdqa (%rsi,%rdx), %xmm1
> + TOLOWER (%xmm0, %xmm1)
> + pcmpistri $0x1a, %xmm1, %xmm0
> +# endif
> + jbe LABEL(exit_use)
> +# if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L
> + sub $16, %r11
> + jbe LABEL(strcmp_exitz)
> +# endif
> + add $16, %rdx
> + jmp LABEL(loop_ashr_1_use)
> +
> + .p2align 4
> +LABEL(nibble_ashr_1_use):
> + sub $0x1000, %r10
> + movdqa -16(%rdi, %rdx), %xmm0
> + psrldq $1, %xmm0
> + pcmpistri $0x3a,%xmm0, %xmm0
> +# if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L
> + cmp %r11, %rcx
> + jae LABEL(nibble_ashr_exit_use)
> +# endif
> + cmp $14, %ecx
> + ja LABEL(nibble_ashr_1_restart_use)
> +
> + jmp LABEL(nibble_ashr_exit_use)
> +
> +/*
> + * The following cases will be handled by ashr_2
> + * rcx(offset of rsi) rax(offset of rdi) relative offset corresponding case
> + * n(14~15) n -14 1(15 +(n-14) - n) ashr_2
> + */
> + .p2align 4
> +LABEL(ashr_2):
> + pslldq $14, %xmm2
> + TOLOWER (%xmm1, %xmm2)
> + pcmpeqb %xmm1, %xmm2
> + psubb %xmm0, %xmm2
> + pmovmskb %xmm2, %r9d
> + shr %cl, %edx
> + shr %cl, %r9d
> + sub %r9d, %edx
> + jnz LABEL(less32bytes)
> + movdqa (%rdi), %xmm3
> + UPDATE_STRNCMP_COUNTER
> +
> + mov $16, %rcx /* index for loads */
> + mov $2, %r9d /* byte position left over from less32bytes case */
> + /*
> + * Setup %r10 value allows us to detect crossing a page boundary.
> + * When %r10 goes positive we have crossed a page boundary and
> + * need to do a nibble.
> + */
> + lea 2(%rdi), %r10
> + and $0xfff, %r10 /* offset into 4K page */
> + sub $0x1000, %r10 /* subtract 4K pagesize */
> + mov %rcx, %rdx /* only for offset of sse4 instruction loop*/
> +
> + .p2align 4
> +LABEL(loop_ashr_2_use):
> + add $16, %r10
> + jg LABEL(nibble_ashr_2_use)
> +
> +LABEL(nibble_ashr_2_restart_use):
> + movdqa (%rdi, %rdx), %xmm0
> + palignr $2, -16(%rdi, %rdx), %xmm0
> +# if !defined USE_AS_STRCASECMP_L && !defined USE_AS_STRNCASECMP_L
> + pcmpistri $0x1a,(%rsi,%rdx), %xmm0
> +# else
> + movdqa (%rsi,%rdx), %xmm1
> + TOLOWER (%xmm0, %xmm1)
> + pcmpistri $0x1a, %xmm1, %xmm0
> +# endif
> + jbe LABEL(exit_use)
> +# if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L
> + sub $16, %r11
> + jbe LABEL(strcmp_exitz)
> +# endif
> +
> + add $16, %rdx
> + add $16, %r10
> + jg LABEL(nibble_ashr_2_use)
> +
> + movdqa (%rdi, %rdx), %xmm0
> + palignr $2, -16(%rdi, %rdx), %xmm0
> +# if !defined USE_AS_STRCASECMP_L && !defined USE_AS_STRNCASECMP_L
> + pcmpistri $0x1a,(%rsi,%rdx), %xmm0
> +# else
> + movdqa (%rsi,%rdx), %xmm1
> + TOLOWER (%xmm0, %xmm1)
> + pcmpistri $0x1a, %xmm1, %xmm0
> +# endif
> + jbe LABEL(exit_use)
> +# if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L
> + sub $16, %r11
> + jbe LABEL(strcmp_exitz)
> +# endif
> + add $16, %rdx
> + jmp LABEL(loop_ashr_2_use)
> +
> + .p2align 4
> +LABEL(nibble_ashr_2_use):
> + sub $0x1000, %r10
> + movdqa -16(%rdi, %rdx), %xmm0
> + psrldq $2, %xmm0
> + pcmpistri $0x3a,%xmm0, %xmm0
> +# if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L
> + cmp %r11, %rcx
> + jae LABEL(nibble_ashr_exit_use)
> +# endif
> + cmp $13, %ecx
> + ja LABEL(nibble_ashr_2_restart_use)
> +
> + jmp LABEL(nibble_ashr_exit_use)
> +
> +/*
> + * The following cases will be handled by ashr_3
> + * rcx(offset of rsi) rax(offset of rdi) relative offset corresponding case
> + * n(13~15) n -13 2(15 +(n-13) - n) ashr_3
> + */
> + .p2align 4
> +LABEL(ashr_3):
> + pslldq $13, %xmm2
> + TOLOWER (%xmm1, %xmm2)
> + pcmpeqb %xmm1, %xmm2
> + psubb %xmm0, %xmm2
> + pmovmskb %xmm2, %r9d
> + shr %cl, %edx
> + shr %cl, %r9d
> + sub %r9d, %edx
> + jnz LABEL(less32bytes)
> + movdqa (%rdi), %xmm3
> +
> + UPDATE_STRNCMP_COUNTER
> +
> + mov $16, %rcx /* index for loads */
> + mov $3, %r9d /* byte position left over from less32bytes case */
> + /*
> + * Setup %r10 value allows us to detect crossing a page boundary.
> + * When %r10 goes positive we have crossed a page boundary and
> + * need to do a nibble.
> + */
> + lea 3(%rdi), %r10
> + and $0xfff, %r10 /* offset into 4K page */
> + sub $0x1000, %r10 /* subtract 4K pagesize */
> + mov %rcx, %rdx /* only for offset of sse4 instruction loop*/
> +
> +LABEL(loop_ashr_3_use):
> + add $16, %r10
> + jg LABEL(nibble_ashr_3_use)
> +
> +LABEL(nibble_ashr_3_restart_use):
> + movdqa (%rdi, %rdx), %xmm0
> + palignr $3, -16(%rdi, %rdx), %xmm0
> +# if !defined USE_AS_STRCASECMP_L && !defined USE_AS_STRNCASECMP_L
> + pcmpistri $0x1a,(%rsi,%rdx), %xmm0
> +# else
> + movdqa (%rsi,%rdx), %xmm1
> + TOLOWER (%xmm0, %xmm1)
> + pcmpistri $0x1a, %xmm1, %xmm0
> +# endif
> + jbe LABEL(exit_use)
> +# if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L
> + sub $16, %r11
> + jbe LABEL(strcmp_exitz)
> +# endif
> +
> + add $16, %rdx
> + add $16, %r10
> + jg LABEL(nibble_ashr_3_use)
> +
> + movdqa (%rdi, %rdx), %xmm0
> + palignr $3, -16(%rdi, %rdx), %xmm0
> +# if !defined USE_AS_STRCASECMP_L && !defined USE_AS_STRNCASECMP_L
> + pcmpistri $0x1a,(%rsi,%rdx), %xmm0
> +# else
> + movdqa (%rsi,%rdx), %xmm1
> + TOLOWER (%xmm0, %xmm1)
> + pcmpistri $0x1a, %xmm1, %xmm0
> +# endif
> + jbe LABEL(exit_use)
> +# if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L
> + sub $16, %r11
> + jbe LABEL(strcmp_exitz)
> +# endif
> + add $16, %rdx
> + jmp LABEL(loop_ashr_3_use)
> +
> + .p2align 4
> +LABEL(nibble_ashr_3_use):
> + sub $0x1000, %r10
> + movdqa -16(%rdi, %rdx), %xmm0
> + psrldq $3, %xmm0
> + pcmpistri $0x3a,%xmm0, %xmm0
> +# if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L
> + cmp %r11, %rcx
> + jae LABEL(nibble_ashr_exit_use)
> +# endif
> + cmp $12, %ecx
> + ja LABEL(nibble_ashr_3_restart_use)
> +
> + jmp LABEL(nibble_ashr_exit_use)
> +
> +/*
> + * The following cases will be handled by ashr_4
> + * rcx(offset of rsi) rax(offset of rdi) relative offset corresponding case
> + * n(12~15) n -12 3(15 +(n-12) - n) ashr_4
> + */
> + .p2align 4
> +LABEL(ashr_4):
> + pslldq $12, %xmm2
> + TOLOWER (%xmm1, %xmm2)
> + pcmpeqb %xmm1, %xmm2
> + psubb %xmm0, %xmm2
> + pmovmskb %xmm2, %r9d
> + shr %cl, %edx
> + shr %cl, %r9d
> + sub %r9d, %edx
> + jnz LABEL(less32bytes)
> + movdqa (%rdi), %xmm3
> +
> + UPDATE_STRNCMP_COUNTER
> +
> + mov $16, %rcx /* index for loads */
> + mov $4, %r9d /* byte position left over from less32bytes case */
> + /*
> + * Setup %r10 value allows us to detect crossing a page boundary.
> + * When %r10 goes positive we have crossed a page boundary and
> + * need to do a nibble.
> + */
> + lea 4(%rdi), %r10
> + and $0xfff, %r10 /* offset into 4K page */
> + sub $0x1000, %r10 /* subtract 4K pagesize */
> + mov %rcx, %rdx /* only for offset of sse4 instruction loop*/
> +
> + .p2align 4
> +LABEL(loop_ashr_4_use):
> + add $16, %r10
> + jg LABEL(nibble_ashr_4_use)
> +
> +LABEL(nibble_ashr_4_restart_use):
> + movdqa (%rdi, %rdx), %xmm0
> + palignr $4, -16(%rdi, %rdx), %xmm0
> +# if !defined USE_AS_STRCASECMP_L && !defined USE_AS_STRNCASECMP_L
> + pcmpistri $0x1a,(%rsi,%rdx), %xmm0
> +# else
> + movdqa (%rsi,%rdx), %xmm1
> + TOLOWER (%xmm0, %xmm1)
> + pcmpistri $0x1a, %xmm1, %xmm0
> +# endif
> + jbe LABEL(exit_use)
> +# if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L
> + sub $16, %r11
> + jbe LABEL(strcmp_exitz)
> +# endif
> +
> + add $16, %rdx
> + add $16, %r10
> + jg LABEL(nibble_ashr_4_use)
> +
> + movdqa (%rdi, %rdx), %xmm0
> + palignr $4, -16(%rdi, %rdx), %xmm0
> +# if !defined USE_AS_STRCASECMP_L && !defined USE_AS_STRNCASECMP_L
> + pcmpistri $0x1a,(%rsi,%rdx), %xmm0
> +# else
> + movdqa (%rsi,%rdx), %xmm1
> + TOLOWER (%xmm0, %xmm1)
> + pcmpistri $0x1a, %xmm1, %xmm0
> +# endif
> + jbe LABEL(exit_use)
> +# if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L
> + sub $16, %r11
> + jbe LABEL(strcmp_exitz)
> +# endif
> + add $16, %rdx
> + jmp LABEL(loop_ashr_4_use)
> +
> + .p2align 4
> +LABEL(nibble_ashr_4_use):
> + sub $0x1000, %r10
> + movdqa -16(%rdi, %rdx), %xmm0
> + psrldq $4, %xmm0
> + pcmpistri $0x3a,%xmm0, %xmm0
> +# if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L
> + cmp %r11, %rcx
> + jae LABEL(nibble_ashr_exit_use)
> +# endif
> + cmp $11, %ecx
> + ja LABEL(nibble_ashr_4_restart_use)
> +
> + jmp LABEL(nibble_ashr_exit_use)
> +
> +/*
> + * The following cases will be handled by ashr_5
> + * rcx(offset of rsi) rax(offset of rdi) relative offset corresponding case
> + * n(11~15) n - 11 4(15 +(n-11) - n) ashr_5
> + */
> + .p2align 4
> +LABEL(ashr_5):
> + pslldq $11, %xmm2
> + TOLOWER (%xmm1, %xmm2)
> + pcmpeqb %xmm1, %xmm2
> + psubb %xmm0, %xmm2
> + pmovmskb %xmm2, %r9d
> + shr %cl, %edx
> + shr %cl, %r9d
> + sub %r9d, %edx
> + jnz LABEL(less32bytes)
> + movdqa (%rdi), %xmm3
> +
> + UPDATE_STRNCMP_COUNTER
> +
> + mov $16, %rcx /* index for loads */
> + mov $5, %r9d /* byte position left over from less32bytes case */
> + /*
> + * Setup %r10 value allows us to detect crossing a page boundary.
> + * When %r10 goes positive we have crossed a page boundary and
> + * need to do a nibble.
> + */
> + lea 5(%rdi), %r10
> + and $0xfff, %r10 /* offset into 4K page */
> + sub $0x1000, %r10 /* subtract 4K pagesize */
> + mov %rcx, %rdx /* only for offset of sse4 instruction loop*/
> +
> + .p2align 4
> +LABEL(loop_ashr_5_use):
> + add $16, %r10
> + jg LABEL(nibble_ashr_5_use)
> +
> +LABEL(nibble_ashr_5_restart_use):
> + movdqa (%rdi, %rdx), %xmm0
> + palignr $5, -16(%rdi, %rdx), %xmm0
> +# if !defined USE_AS_STRCASECMP_L && !defined USE_AS_STRNCASECMP_L
> + pcmpistri $0x1a,(%rsi,%rdx), %xmm0
> +# else
> + movdqa (%rsi,%rdx), %xmm1
> + TOLOWER (%xmm0, %xmm1)
> + pcmpistri $0x1a, %xmm1, %xmm0
> +# endif
> + jbe LABEL(exit_use)
> +# if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L
> + sub $16, %r11
> + jbe LABEL(strcmp_exitz)
> +# endif
> +
> + add $16, %rdx
> + add $16, %r10
> + jg LABEL(nibble_ashr_5_use)
> +
> + movdqa (%rdi, %rdx), %xmm0
> +
> + palignr $5, -16(%rdi, %rdx), %xmm0
> +# if !defined USE_AS_STRCASECMP_L && !defined USE_AS_STRNCASECMP_L
> + pcmpistri $0x1a,(%rsi,%rdx), %xmm0
> +# else
> + movdqa (%rsi,%rdx), %xmm1
> + TOLOWER (%xmm0, %xmm1)
> + pcmpistri $0x1a, %xmm1, %xmm0
> +# endif
> + jbe LABEL(exit_use)
> +# if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L
> + sub $16, %r11
> + jbe LABEL(strcmp_exitz)
> +# endif
> + add $16, %rdx
> + jmp LABEL(loop_ashr_5_use)
> +
> + .p2align 4
> +LABEL(nibble_ashr_5_use):
> + sub $0x1000, %r10
> + movdqa -16(%rdi, %rdx), %xmm0
> + psrldq $5, %xmm0
> + pcmpistri $0x3a,%xmm0, %xmm0
> +# if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L
> + cmp %r11, %rcx
> + jae LABEL(nibble_ashr_exit_use)
> +# endif
> + cmp $10, %ecx
> + ja LABEL(nibble_ashr_5_restart_use)
> +
> + jmp LABEL(nibble_ashr_exit_use)
> +
> +/*
> + * The following cases will be handled by ashr_6
> + * rcx(offset of rsi) rax(offset of rdi) relative offset corresponding case
> + * n(10~15) n - 10 5(15 +(n-10) - n) ashr_6
> + */
> + .p2align 4
> +LABEL(ashr_6):
> + pslldq $10, %xmm2
> + TOLOWER (%xmm1, %xmm2)
> + pcmpeqb %xmm1, %xmm2
> + psubb %xmm0, %xmm2
> + pmovmskb %xmm2, %r9d
> + shr %cl, %edx
> + shr %cl, %r9d
> + sub %r9d, %edx
> + jnz LABEL(less32bytes)
> + movdqa (%rdi), %xmm3
> +
> + UPDATE_STRNCMP_COUNTER
> +
> + mov $16, %rcx /* index for loads */
> + mov $6, %r9d /* byte position left over from less32bytes case */
> + /*
> + * Setup %r10 value allows us to detect crossing a page boundary.
> + * When %r10 goes positive we have crossed a page boundary and
> + * need to do a nibble.
> + */
> + lea 6(%rdi), %r10
> + and $0xfff, %r10 /* offset into 4K page */
> + sub $0x1000, %r10 /* subtract 4K pagesize */
> + mov %rcx, %rdx /* only for offset of sse4 instruction loop*/
> +
> + .p2align 4
> +LABEL(loop_ashr_6_use):
> + add $16, %r10
> + jg LABEL(nibble_ashr_6_use)
> +
> +LABEL(nibble_ashr_6_restart_use):
> + movdqa (%rdi, %rdx), %xmm0
> + palignr $6, -16(%rdi, %rdx), %xmm0
> +# if !defined USE_AS_STRCASECMP_L && !defined USE_AS_STRNCASECMP_L
> + pcmpistri $0x1a,(%rsi,%rdx), %xmm0
> +# else
> + movdqa (%rsi,%rdx), %xmm1
> + TOLOWER (%xmm0, %xmm1)
> + pcmpistri $0x1a, %xmm1, %xmm0
> +# endif
> + jbe LABEL(exit_use)
> +# if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L
> + sub $16, %r11
> + jbe LABEL(strcmp_exitz)
> +# endif
> +
> + add $16, %rdx
> + add $16, %r10
> + jg LABEL(nibble_ashr_6_use)
> +
> + movdqa (%rdi, %rdx), %xmm0
> + palignr $6, -16(%rdi, %rdx), %xmm0
> +# if !defined USE_AS_STRCASECMP_L && !defined USE_AS_STRNCASECMP_L
> + pcmpistri $0x1a,(%rsi,%rdx), %xmm0
> +# else
> + movdqa (%rsi,%rdx), %xmm1
> + TOLOWER (%xmm0, %xmm1)
> + pcmpistri $0x1a, %xmm1, %xmm0
> +# endif
> + jbe LABEL(exit_use)
> +# if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L
> + sub $16, %r11
> + jbe LABEL(strcmp_exitz)
> +# endif
> + add $16, %rdx
> + jmp LABEL(loop_ashr_6_use)
> +
> + .p2align 4
> +LABEL(nibble_ashr_6_use):
> + sub $0x1000, %r10
> + movdqa -16(%rdi, %rdx), %xmm0
> + psrldq $6, %xmm0
> + pcmpistri $0x3a,%xmm0, %xmm0
> +# if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L
> + cmp %r11, %rcx
> + jae LABEL(nibble_ashr_exit_use)
> +# endif
> + cmp $9, %ecx
> + ja LABEL(nibble_ashr_6_restart_use)
> +
> + jmp LABEL(nibble_ashr_exit_use)
> +
> +/*
> + * The following cases will be handled by ashr_7
> + * rcx(offset of rsi) rax(offset of rdi) relative offset corresponding case
> + * n(9~15) n - 9 6(15 +(n - 9) - n) ashr_7
> + */
> + .p2align 4
> +LABEL(ashr_7):
> + pslldq $9, %xmm2
> + TOLOWER (%xmm1, %xmm2)
> + pcmpeqb %xmm1, %xmm2
> + psubb %xmm0, %xmm2
> + pmovmskb %xmm2, %r9d
> + shr %cl, %edx
> + shr %cl, %r9d
> + sub %r9d, %edx
> + jnz LABEL(less32bytes)
> + movdqa (%rdi), %xmm3
> +
> + UPDATE_STRNCMP_COUNTER
> +
> + mov $16, %rcx /* index for loads */
> + mov $7, %r9d /* byte position left over from less32bytes case */
> + /*
> + * Setup %r10 value allows us to detect crossing a page boundary.
> + * When %r10 goes positive we have crossed a page boundary and
> + * need to do a nibble.
> + */
> + lea 7(%rdi), %r10
> + and $0xfff, %r10 /* offset into 4K page */
> + sub $0x1000, %r10 /* subtract 4K pagesize */
> + mov %rcx, %rdx /* only for offset of sse4 instruction loop*/
> +
> + .p2align 4
> +LABEL(loop_ashr_7_use):
> + add $16, %r10
> + jg LABEL(nibble_ashr_7_use)
> +
> +LABEL(nibble_ashr_7_restart_use):
> + movdqa (%rdi, %rdx), %xmm0
> + palignr $7, -16(%rdi, %rdx), %xmm0
> +# if !defined USE_AS_STRCASECMP_L && !defined USE_AS_STRNCASECMP_L
> + pcmpistri $0x1a,(%rsi,%rdx), %xmm0
> +# else
> + movdqa (%rsi,%rdx), %xmm1
> + TOLOWER (%xmm0, %xmm1)
> + pcmpistri $0x1a, %xmm1, %xmm0
> +# endif
> + jbe LABEL(exit_use)
> +# if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L
> + sub $16, %r11
> + jbe LABEL(strcmp_exitz)
> +# endif
> +
> + add $16, %rdx
> + add $16, %r10
> + jg LABEL(nibble_ashr_7_use)
> +
> + movdqa (%rdi, %rdx), %xmm0
> + palignr $7, -16(%rdi, %rdx), %xmm0
> +# if !defined USE_AS_STRCASECMP_L && !defined USE_AS_STRNCASECMP_L
> + pcmpistri $0x1a,(%rsi,%rdx), %xmm0
> +# else
> + movdqa (%rsi,%rdx), %xmm1
> + TOLOWER (%xmm0, %xmm1)
> + pcmpistri $0x1a, %xmm1, %xmm0
> +# endif
> + jbe LABEL(exit_use)
> +# if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L
> + sub $16, %r11
> + jbe LABEL(strcmp_exitz)
> +# endif
> + add $16, %rdx
> + jmp LABEL(loop_ashr_7_use)
> +
> + .p2align 4
> +LABEL(nibble_ashr_7_use):
> + sub $0x1000, %r10
> + movdqa -16(%rdi, %rdx), %xmm0
> + psrldq $7, %xmm0
> + pcmpistri $0x3a,%xmm0, %xmm0
> +# if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L
> + cmp %r11, %rcx
> + jae LABEL(nibble_ashr_exit_use)
> +# endif
> + cmp $8, %ecx
> + ja LABEL(nibble_ashr_7_restart_use)
> +
> + jmp LABEL(nibble_ashr_exit_use)
> +
> +/*
> + * The following cases will be handled by ashr_8
> + * rcx(offset of rsi) rax(offset of rdi) relative offset corresponding case
> + * n(8~15) n - 8 7(15 +(n - 8) - n) ashr_8
> + */
> + .p2align 4
> +LABEL(ashr_8):
> + pslldq $8, %xmm2
> + TOLOWER (%xmm1, %xmm2)
> + pcmpeqb %xmm1, %xmm2
> + psubb %xmm0, %xmm2
> + pmovmskb %xmm2, %r9d
> + shr %cl, %edx
> + shr %cl, %r9d
> + sub %r9d, %edx
> + jnz LABEL(less32bytes)
> + movdqa (%rdi), %xmm3
> +
> + UPDATE_STRNCMP_COUNTER
> +
> + mov $16, %rcx /* index for loads */
> + mov $8, %r9d /* byte position left over from less32bytes case */
> + /*
> + * Setup %r10 value allows us to detect crossing a page boundary.
> + * When %r10 goes positive we have crossed a page boundary and
> + * need to do a nibble.
> + */
> + lea 8(%rdi), %r10
> + and $0xfff, %r10 /* offset into 4K page */
> + sub $0x1000, %r10 /* subtract 4K pagesize */
> + mov %rcx, %rdx /* only for offset of sse4 instruction loop*/
> +
> + .p2align 4
> +LABEL(loop_ashr_8_use):
> + add $16, %r10
> + jg LABEL(nibble_ashr_8_use)
> +
> +LABEL(nibble_ashr_8_restart_use):
> + movdqa (%rdi, %rdx), %xmm0
> + palignr $8, -16(%rdi, %rdx), %xmm0
> +# if !defined USE_AS_STRCASECMP_L && !defined USE_AS_STRNCASECMP_L
> + pcmpistri $0x1a, (%rsi,%rdx), %xmm0
> +# else
> + movdqa (%rsi,%rdx), %xmm1
> + TOLOWER (%xmm0, %xmm1)
> + pcmpistri $0x1a, %xmm1, %xmm0
> +# endif
> + jbe LABEL(exit_use)
> +# if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L
> + sub $16, %r11
> + jbe LABEL(strcmp_exitz)
> +# endif
> +
> + add $16, %rdx
> + add $16, %r10
> + jg LABEL(nibble_ashr_8_use)
> +
> + movdqa (%rdi, %rdx), %xmm0
> + palignr $8, -16(%rdi, %rdx), %xmm0
> +# if !defined USE_AS_STRCASECMP_L && !defined USE_AS_STRNCASECMP_L
> + pcmpistri $0x1a, (%rsi,%rdx), %xmm0
> +# else
> + movdqa (%rsi,%rdx), %xmm1
> + TOLOWER (%xmm0, %xmm1)
> + pcmpistri $0x1a, %xmm1, %xmm0
> +# endif
> + jbe LABEL(exit_use)
> +# if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L
> + sub $16, %r11
> + jbe LABEL(strcmp_exitz)
> +# endif
> + add $16, %rdx
> + jmp LABEL(loop_ashr_8_use)
> +
> + .p2align 4
> +LABEL(nibble_ashr_8_use):
> + sub $0x1000, %r10
> + movdqa -16(%rdi, %rdx), %xmm0
> + psrldq $8, %xmm0
> + pcmpistri $0x3a,%xmm0, %xmm0
> +# if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L
> + cmp %r11, %rcx
> + jae LABEL(nibble_ashr_exit_use)
> +# endif
> + cmp $7, %ecx
> + ja LABEL(nibble_ashr_8_restart_use)
> +
> + jmp LABEL(nibble_ashr_exit_use)
> +
> +/*
> + * The following cases will be handled by ashr_9
> + * rcx(offset of rsi) rax(offset of rdi) relative offset corresponding case
> + * n(7~15) n - 7 8(15 +(n - 7) - n) ashr_9
> + */
> + .p2align 4
> +LABEL(ashr_9):
> + pslldq $7, %xmm2
> + TOLOWER (%xmm1, %xmm2)
> + pcmpeqb %xmm1, %xmm2
> + psubb %xmm0, %xmm2
> + pmovmskb %xmm2, %r9d
> + shr %cl, %edx
> + shr %cl, %r9d
> + sub %r9d, %edx
> + jnz LABEL(less32bytes)
> + movdqa (%rdi), %xmm3
> +
> + UPDATE_STRNCMP_COUNTER
> +
> + mov $16, %rcx /* index for loads */
> + mov $9, %r9d /* byte position left over from less32bytes case */
> + /*
> + * Setup %r10 value allows us to detect crossing a page boundary.
> + * When %r10 goes positive we have crossed a page boundary and
> + * need to do a nibble.
> + */
> + lea 9(%rdi), %r10
> + and $0xfff, %r10 /* offset into 4K page */
> + sub $0x1000, %r10 /* subtract 4K pagesize */
> + mov %rcx, %rdx /* only for offset of sse4 instruction loop*/
> +
> + .p2align 4
> +LABEL(loop_ashr_9_use):
> + add $16, %r10
> + jg LABEL(nibble_ashr_9_use)
> +
> +LABEL(nibble_ashr_9_restart_use):
> + movdqa (%rdi, %rdx), %xmm0
> +
> + palignr $9, -16(%rdi, %rdx), %xmm0
> +# if !defined USE_AS_STRCASECMP_L && !defined USE_AS_STRNCASECMP_L
> + pcmpistri $0x1a, (%rsi,%rdx), %xmm0
> +# else
> + movdqa (%rsi,%rdx), %xmm1
> + TOLOWER (%xmm0, %xmm1)
> + pcmpistri $0x1a, %xmm1, %xmm0
> +# endif
> + jbe LABEL(exit_use)
> +# if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L
> + sub $16, %r11
> + jbe LABEL(strcmp_exitz)
> +# endif
> +
> + add $16, %rdx
> + add $16, %r10
> + jg LABEL(nibble_ashr_9_use)
> +
> + movdqa (%rdi, %rdx), %xmm0
> + palignr $9, -16(%rdi, %rdx), %xmm0
> +# if !defined USE_AS_STRCASECMP_L && !defined USE_AS_STRNCASECMP_L
> + pcmpistri $0x1a, (%rsi,%rdx), %xmm0
> +# else
> + movdqa (%rsi,%rdx), %xmm1
> + TOLOWER (%xmm0, %xmm1)
> + pcmpistri $0x1a, %xmm1, %xmm0
> +# endif
> + jbe LABEL(exit_use)
> +# if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L
> + sub $16, %r11
> + jbe LABEL(strcmp_exitz)
> +# endif
> + add $16, %rdx
> + jmp LABEL(loop_ashr_9_use)
> +
> + .p2align 4
> +LABEL(nibble_ashr_9_use):
> + sub $0x1000, %r10
> + movdqa -16(%rdi, %rdx), %xmm0
> + psrldq $9, %xmm0
> + pcmpistri $0x3a,%xmm0, %xmm0
> +# if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L
> + cmp %r11, %rcx
> + jae LABEL(nibble_ashr_exit_use)
> +# endif
> + cmp $6, %ecx
> + ja LABEL(nibble_ashr_9_restart_use)
> +
> + jmp LABEL(nibble_ashr_exit_use)
> +
> +/*
> + * The following cases will be handled by ashr_10
> + * rcx(offset of rsi) rax(offset of rdi) relative offset corresponding case
> + * n(6~15) n - 6 9(15 +(n - 6) - n) ashr_10
> + */
> + .p2align 4
> +LABEL(ashr_10):
> + pslldq $6, %xmm2
> + TOLOWER (%xmm1, %xmm2)
> + pcmpeqb %xmm1, %xmm2
> + psubb %xmm0, %xmm2
> + pmovmskb %xmm2, %r9d
> + shr %cl, %edx
> + shr %cl, %r9d
> + sub %r9d, %edx
> + jnz LABEL(less32bytes)
> + movdqa (%rdi), %xmm3
> +
> + UPDATE_STRNCMP_COUNTER
> +
> + mov $16, %rcx /* index for loads */
> + mov $10, %r9d /* byte position left over from less32bytes case */
> + /*
> + * Setup %r10 value allows us to detect crossing a page boundary.
> + * When %r10 goes positive we have crossed a page boundary and
> + * need to do a nibble.
> + */
> + lea 10(%rdi), %r10
> + and $0xfff, %r10 /* offset into 4K page */
> + sub $0x1000, %r10 /* subtract 4K pagesize */
> + mov %rcx, %rdx /* only for offset of sse4 instruction loop*/
> +
> + .p2align 4
> +LABEL(loop_ashr_10_use):
> + add $16, %r10
> + jg LABEL(nibble_ashr_10_use)
> +
> +LABEL(nibble_ashr_10_restart_use):
> + movdqa (%rdi, %rdx), %xmm0
> + palignr $10, -16(%rdi, %rdx), %xmm0
> +# if !defined USE_AS_STRCASECMP_L && !defined USE_AS_STRNCASECMP_L
> + pcmpistri $0x1a, (%rsi,%rdx), %xmm0
> +# else
> + movdqa (%rsi,%rdx), %xmm1
> + TOLOWER (%xmm0, %xmm1)
> + pcmpistri $0x1a, %xmm1, %xmm0
> +# endif
> + jbe LABEL(exit_use)
> +# if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L
> + sub $16, %r11
> + jbe LABEL(strcmp_exitz)
> +# endif
> +
> + add $16, %rdx
> + add $16, %r10
> + jg LABEL(nibble_ashr_10_use)
> +
> + movdqa (%rdi, %rdx), %xmm0
> + palignr $10, -16(%rdi, %rdx), %xmm0
> +# if !defined USE_AS_STRCASECMP_L && !defined USE_AS_STRNCASECMP_L
> + pcmpistri $0x1a, (%rsi,%rdx), %xmm0
> +# else
> + movdqa (%rsi,%rdx), %xmm1
> + TOLOWER (%xmm0, %xmm1)
> + pcmpistri $0x1a, %xmm1, %xmm0
> +# endif
> + jbe LABEL(exit_use)
> +# if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L
> + sub $16, %r11
> + jbe LABEL(strcmp_exitz)
> +# endif
> + add $16, %rdx
> + jmp LABEL(loop_ashr_10_use)
> +
> + .p2align 4
> +LABEL(nibble_ashr_10_use):
> + sub $0x1000, %r10
> + movdqa -16(%rdi, %rdx), %xmm0
> + psrldq $10, %xmm0
> + pcmpistri $0x3a,%xmm0, %xmm0
> +# if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L
> + cmp %r11, %rcx
> + jae LABEL(nibble_ashr_exit_use)
> +# endif
> + cmp $5, %ecx
> + ja LABEL(nibble_ashr_10_restart_use)
> +
> + jmp LABEL(nibble_ashr_exit_use)
> +
> +/*
> + * The following cases will be handled by ashr_11
> + * rcx(offset of rsi) rax(offset of rdi) relative offset corresponding case
> + * n(5~15) n - 5 10(15 +(n - 5) - n) ashr_11
> + */
> + .p2align 4
> +LABEL(ashr_11):
> + pslldq $5, %xmm2
> + TOLOWER (%xmm1, %xmm2)
> + pcmpeqb %xmm1, %xmm2
> + psubb %xmm0, %xmm2
> + pmovmskb %xmm2, %r9d
> + shr %cl, %edx
> + shr %cl, %r9d
> + sub %r9d, %edx
> + jnz LABEL(less32bytes)
> + movdqa (%rdi), %xmm3
> +
> + UPDATE_STRNCMP_COUNTER
> +
> + mov $16, %rcx /* index for loads */
> + mov $11, %r9d /* byte position left over from less32bytes case */
> + /*
> + * Setup %r10 value allows us to detect crossing a page boundary.
> + * When %r10 goes positive we have crossed a page boundary and
> + * need to do a nibble.
> + */
> + lea 11(%rdi), %r10
> + and $0xfff, %r10 /* offset into 4K page */
> + sub $0x1000, %r10 /* subtract 4K pagesize */
> + mov %rcx, %rdx /* only for offset of sse4 instruction loop*/
> +
> + .p2align 4
> +LABEL(loop_ashr_11_use):
> + add $16, %r10
> + jg LABEL(nibble_ashr_11_use)
> +
> +LABEL(nibble_ashr_11_restart_use):
> + movdqa (%rdi, %rdx), %xmm0
> + palignr $11, -16(%rdi, %rdx), %xmm0
> +# if !defined USE_AS_STRCASECMP_L && !defined USE_AS_STRNCASECMP_L
> + pcmpistri $0x1a, (%rsi,%rdx), %xmm0
> +# else
> + movdqa (%rsi,%rdx), %xmm1
> + TOLOWER (%xmm0, %xmm1)
> + pcmpistri $0x1a, %xmm1, %xmm0
> +# endif
> + jbe LABEL(exit_use)
> +# if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L
> + sub $16, %r11
> + jbe LABEL(strcmp_exitz)
> +# endif
> +
> + add $16, %rdx
> + add $16, %r10
> + jg LABEL(nibble_ashr_11_use)
> +
> + movdqa (%rdi, %rdx), %xmm0
> + palignr $11, -16(%rdi, %rdx), %xmm0
> +# if !defined USE_AS_STRCASECMP_L && !defined USE_AS_STRNCASECMP_L
> + pcmpistri $0x1a, (%rsi,%rdx), %xmm0
> +# else
> + movdqa (%rsi,%rdx), %xmm1
> + TOLOWER (%xmm0, %xmm1)
> + pcmpistri $0x1a, %xmm1, %xmm0
> +# endif
> + jbe LABEL(exit_use)
> +# if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L
> + sub $16, %r11
> + jbe LABEL(strcmp_exitz)
> +# endif
> + add $16, %rdx
> + jmp LABEL(loop_ashr_11_use)
> +
> + .p2align 4
> +LABEL(nibble_ashr_11_use):
> + sub $0x1000, %r10
> + movdqa -16(%rdi, %rdx), %xmm0
> + psrldq $11, %xmm0
> + pcmpistri $0x3a,%xmm0, %xmm0
> +# if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L
> + cmp %r11, %rcx
> + jae LABEL(nibble_ashr_exit_use)
> +# endif
> + cmp $4, %ecx
> + ja LABEL(nibble_ashr_11_restart_use)
> +
> + jmp LABEL(nibble_ashr_exit_use)
> +
> +/*
> + * The following cases will be handled by ashr_12
> + * rcx(offset of rsi) rax(offset of rdi) relative offset corresponding case
> + * n(4~15) n - 4 11(15 +(n - 4) - n) ashr_12
> + */
> + .p2align 4
> +LABEL(ashr_12):
> + pslldq $4, %xmm2
> + TOLOWER (%xmm1, %xmm2)
> + pcmpeqb %xmm1, %xmm2
> + psubb %xmm0, %xmm2
> + pmovmskb %xmm2, %r9d
> + shr %cl, %edx
> + shr %cl, %r9d
> + sub %r9d, %edx
> + jnz LABEL(less32bytes)
> + movdqa (%rdi), %xmm3
> +
> + UPDATE_STRNCMP_COUNTER
> +
> + mov $16, %rcx /* index for loads */
> + mov $12, %r9d /* byte position left over from less32bytes case */
> + /*
> + * Setup %r10 value allows us to detect crossing a page boundary.
> + * When %r10 goes positive we have crossed a page boundary and
> + * need to do a nibble.
> + */
> + lea 12(%rdi), %r10
> + and $0xfff, %r10 /* offset into 4K page */
> + sub $0x1000, %r10 /* subtract 4K pagesize */
> + mov %rcx, %rdx /* only for offset of sse4 instruction loop*/
> +
> + .p2align 4
> +LABEL(loop_ashr_12_use):
> + add $16, %r10
> + jg LABEL(nibble_ashr_12_use)
> +
> +LABEL(nibble_ashr_12_restart_use):
> + movdqa (%rdi, %rdx), %xmm0
> + palignr $12, -16(%rdi, %rdx), %xmm0
> +# if !defined USE_AS_STRCASECMP_L && !defined USE_AS_STRNCASECMP_L
> + pcmpistri $0x1a, (%rsi,%rdx), %xmm0
> +# else
> + movdqa (%rsi,%rdx), %xmm1
> + TOLOWER (%xmm0, %xmm1)
> + pcmpistri $0x1a, %xmm1, %xmm0
> +# endif
> + jbe LABEL(exit_use)
> +# if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L
> + sub $16, %r11
> + jbe LABEL(strcmp_exitz)
> +# endif
> +
> + add $16, %rdx
> + add $16, %r10
> + jg LABEL(nibble_ashr_12_use)
> +
> + movdqa (%rdi, %rdx), %xmm0
> + palignr $12, -16(%rdi, %rdx), %xmm0
> +# if !defined USE_AS_STRCASECMP_L && !defined USE_AS_STRNCASECMP_L
> + pcmpistri $0x1a, (%rsi,%rdx), %xmm0
> +# else
> + movdqa (%rsi,%rdx), %xmm1
> + TOLOWER (%xmm0, %xmm1)
> + pcmpistri $0x1a, %xmm1, %xmm0
> +# endif
> + jbe LABEL(exit_use)
> +# if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L
> + sub $16, %r11
> + jbe LABEL(strcmp_exitz)
> +# endif
> + add $16, %rdx
> + jmp LABEL(loop_ashr_12_use)
> +
> + .p2align 4
> +LABEL(nibble_ashr_12_use):
> + sub $0x1000, %r10
> + movdqa -16(%rdi, %rdx), %xmm0
> + psrldq $12, %xmm0
> + pcmpistri $0x3a,%xmm0, %xmm0
> +# if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L
> + cmp %r11, %rcx
> + jae LABEL(nibble_ashr_exit_use)
> +# endif
> + cmp $3, %ecx
> + ja LABEL(nibble_ashr_12_restart_use)
> +
> + jmp LABEL(nibble_ashr_exit_use)
> +
> +/*
> + * The following cases will be handled by ashr_13
> + * rcx(offset of rsi) rax(offset of rdi) relative offset corresponding case
> + * n(3~15) n - 3 12(15 +(n - 3) - n) ashr_13
> + */
> + .p2align 4
> +LABEL(ashr_13):
> + pslldq $3, %xmm2
> + TOLOWER (%xmm1, %xmm2)
> + pcmpeqb %xmm1, %xmm2
> + psubb %xmm0, %xmm2
> + pmovmskb %xmm2, %r9d
> + shr %cl, %edx
> + shr %cl, %r9d
> + sub %r9d, %edx
> + jnz LABEL(less32bytes)
> + movdqa (%rdi), %xmm3
> +
> + UPDATE_STRNCMP_COUNTER
> +
> + mov $16, %rcx /* index for loads */
> + mov $13, %r9d /* byte position left over from less32bytes case */
> + /*
> + * Setup %r10 value allows us to detect crossing a page boundary.
> + * When %r10 goes positive we have crossed a page boundary and
> + * need to do a nibble.
> + */
> + lea 13(%rdi), %r10
> + and $0xfff, %r10 /* offset into 4K page */
> + sub $0x1000, %r10 /* subtract 4K pagesize */
> +
> + mov %rcx, %rdx /* only for offset of sse4 instruction loop*/
> +
> + .p2align 4
> +LABEL(loop_ashr_13_use):
> + add $16, %r10
> + jg LABEL(nibble_ashr_13_use)
> +
> +LABEL(nibble_ashr_13_restart_use):
> + movdqa (%rdi, %rdx), %xmm0
> + palignr $13, -16(%rdi, %rdx), %xmm0
> +# if !defined USE_AS_STRCASECMP_L && !defined USE_AS_STRNCASECMP_L
> + pcmpistri $0x1a, (%rsi,%rdx), %xmm0
> +# else
> + movdqa (%rsi,%rdx), %xmm1
> + TOLOWER (%xmm0, %xmm1)
> + pcmpistri $0x1a, %xmm1, %xmm0
> +# endif
> + jbe LABEL(exit_use)
> +# if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L
> + sub $16, %r11
> + jbe LABEL(strcmp_exitz)
> +# endif
> +
> + add $16, %rdx
> + add $16, %r10
> + jg LABEL(nibble_ashr_13_use)
> +
> + movdqa (%rdi, %rdx), %xmm0
> + palignr $13, -16(%rdi, %rdx), %xmm0
> +# if !defined USE_AS_STRCASECMP_L && !defined USE_AS_STRNCASECMP_L
> + pcmpistri $0x1a, (%rsi,%rdx), %xmm0
> +# else
> + movdqa (%rsi,%rdx), %xmm1
> + TOLOWER (%xmm0, %xmm1)
> + pcmpistri $0x1a, %xmm1, %xmm0
> +# endif
> + jbe LABEL(exit_use)
> +# if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L
> + sub $16, %r11
> + jbe LABEL(strcmp_exitz)
> +# endif
> + add $16, %rdx
> + jmp LABEL(loop_ashr_13_use)
> +
> + .p2align 4
> +LABEL(nibble_ashr_13_use):
> + sub $0x1000, %r10
> + movdqa -16(%rdi, %rdx), %xmm0
> + psrldq $13, %xmm0
> + pcmpistri $0x3a,%xmm0, %xmm0
> +# if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L
> + cmp %r11, %rcx
> + jae LABEL(nibble_ashr_exit_use)
> +# endif
> + cmp $2, %ecx
> + ja LABEL(nibble_ashr_13_restart_use)
> +
> + jmp LABEL(nibble_ashr_exit_use)
> +
> +/*
> + * The following cases will be handled by ashr_14
> + * rcx(offset of rsi) rax(offset of rdi) relative offset corresponding case
> + * n(2~15) n - 2 13(15 +(n - 2) - n) ashr_14
> + */
> + .p2align 4
> +LABEL(ashr_14):
> + pslldq $2, %xmm2
> + TOLOWER (%xmm1, %xmm2)
> + pcmpeqb %xmm1, %xmm2
> + psubb %xmm0, %xmm2
> + pmovmskb %xmm2, %r9d
> + shr %cl, %edx
> + shr %cl, %r9d
> + sub %r9d, %edx
> + jnz LABEL(less32bytes)
> + movdqa (%rdi), %xmm3
> +
> + UPDATE_STRNCMP_COUNTER
> +
> + mov $16, %rcx /* index for loads */
> + mov $14, %r9d /* byte position left over from less32bytes case */
> + /*
> + * Setup %r10 value allows us to detect crossing a page boundary.
> + * When %r10 goes positive we have crossed a page boundary and
> + * need to do a nibble.
> + */
> + lea 14(%rdi), %r10
> + and $0xfff, %r10 /* offset into 4K page */
> + sub $0x1000, %r10 /* subtract 4K pagesize */
> +
> + mov %rcx, %rdx /* only for offset of sse4 instruction loop*/
> +
> + .p2align 4
> +LABEL(loop_ashr_14_use):
> + add $16, %r10
> + jg LABEL(nibble_ashr_14_use)
> +
> +LABEL(nibble_ashr_14_restart_use):
> + movdqa (%rdi, %rdx), %xmm0
> + palignr $14, -16(%rdi, %rdx), %xmm0
> +# if !defined USE_AS_STRCASECMP_L && !defined USE_AS_STRNCASECMP_L
> + pcmpistri $0x1a, (%rsi,%rdx), %xmm0
> +# else
> + movdqa (%rsi,%rdx), %xmm1
> + TOLOWER (%xmm0, %xmm1)
> + pcmpistri $0x1a, %xmm1, %xmm0
> +# endif
> + jbe LABEL(exit_use)
> +# if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L
> + sub $16, %r11
> + jbe LABEL(strcmp_exitz)
> +# endif
> +
> + add $16, %rdx
> + add $16, %r10
> + jg LABEL(nibble_ashr_14_use)
> +
> + movdqa (%rdi, %rdx), %xmm0
> + palignr $14, -16(%rdi, %rdx), %xmm0
> +# if !defined USE_AS_STRCASECMP_L && !defined USE_AS_STRNCASECMP_L
> + pcmpistri $0x1a, (%rsi,%rdx), %xmm0
> +# else
> + movdqa (%rsi,%rdx), %xmm1
> + TOLOWER (%xmm0, %xmm1)
> + pcmpistri $0x1a, %xmm1, %xmm0
> +# endif
> + jbe LABEL(exit_use)
> +# if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L
> + sub $16, %r11
> + jbe LABEL(strcmp_exitz)
> +# endif
> + add $16, %rdx
> + jmp LABEL(loop_ashr_14_use)
> +
> + .p2align 4
> +LABEL(nibble_ashr_14_use):
> + sub $0x1000, %r10
> + movdqa -16(%rdi, %rdx), %xmm0
> + psrldq $14, %xmm0
> + pcmpistri $0x3a,%xmm0, %xmm0
> +# if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L
> + cmp %r11, %rcx
> + jae LABEL(nibble_ashr_exit_use)
> +# endif
> + cmp $1, %ecx
> + ja LABEL(nibble_ashr_14_restart_use)
> +
> + jmp LABEL(nibble_ashr_exit_use)
> +
> +/*
> + * The following cases will be handled by ashr_15
> + * rcx(offset of rsi) rax(offset of rdi) relative offset corresponding case
> + * n(1~15) n - 1 14(15 +(n - 1) - n) ashr_15
> + */
> + .p2align 4
> +LABEL(ashr_15):
> + pslldq $1, %xmm2
> + TOLOWER (%xmm1, %xmm2)
> + pcmpeqb %xmm1, %xmm2
> + psubb %xmm0, %xmm2
> + pmovmskb %xmm2, %r9d
> + shr %cl, %edx
> + shr %cl, %r9d
> + sub %r9d, %edx
> + jnz LABEL(less32bytes)
> +
> + movdqa (%rdi), %xmm3
> +
> + UPDATE_STRNCMP_COUNTER
> +
> + mov $16, %rcx /* index for loads */
> + mov $15, %r9d /* byte position left over from less32bytes case */
> + /*
> + * Setup %r10 value allows us to detect crossing a page boundary.
> + * When %r10 goes positive we have crossed a page boundary and
> + * need to do a nibble.
> + */
> + lea 15(%rdi), %r10
> + and $0xfff, %r10 /* offset into 4K page */
> +
> + sub $0x1000, %r10 /* subtract 4K pagesize */
> +
> + mov %rcx, %rdx /* only for offset of sse4 instruction loop*/
> +
> + .p2align 4
> +LABEL(loop_ashr_15_use):
> + add $16, %r10
> + jg LABEL(nibble_ashr_15_use)
> +
> +LABEL(nibble_ashr_15_restart_use):
> + movdqa (%rdi, %rdx), %xmm0
> + palignr $15, -16(%rdi, %rdx), %xmm0
> +# if !defined USE_AS_STRCASECMP_L && !defined USE_AS_STRNCASECMP_L
> + pcmpistri $0x1a, (%rsi,%rdx), %xmm0
> +# else
> + movdqa (%rsi,%rdx), %xmm1
> + TOLOWER (%xmm0, %xmm1)
> + pcmpistri $0x1a, %xmm1, %xmm0
> +# endif
> + jbe LABEL(exit_use)
> +# if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L
> + sub $16, %r11
> + jbe LABEL(strcmp_exitz)
> +# endif
> +
> + add $16, %rdx
> + add $16, %r10
> + jg LABEL(nibble_ashr_15_use)
> +
> + movdqa (%rdi, %rdx), %xmm0
> + palignr $15, -16(%rdi, %rdx), %xmm0
> +# if !defined USE_AS_STRCASECMP_L && !defined USE_AS_STRNCASECMP_L
> + pcmpistri $0x1a, (%rsi,%rdx), %xmm0
> +# else
> + movdqa (%rsi,%rdx), %xmm1
> + TOLOWER (%xmm0, %xmm1)
> + pcmpistri $0x1a, %xmm1, %xmm0
> +# endif
> + jbe LABEL(exit_use)
> +# if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L
> + sub $16, %r11
> + jbe LABEL(strcmp_exitz)
> +# endif
> + add $16, %rdx
> + jmp LABEL(loop_ashr_15_use)
> +
> + .p2align 4
> +LABEL(nibble_ashr_15_use):
> + sub $0x1000, %r10
> + movdqa -16(%rdi, %rdx), %xmm0
> + psrldq $15, %xmm0
> + pcmpistri $0x3a,%xmm0, %xmm0
> +# if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L
> + cmp %r11, %rcx
> + jae LABEL(nibble_ashr_exit_use)
> +# endif
> + cmp $0, %ecx
> + ja LABEL(nibble_ashr_15_restart_use)
> +
> +LABEL(nibble_ashr_exit_use):
> +# if !defined USE_AS_STRCASECMP_L && !defined USE_AS_STRNCASECMP_L
> + pcmpistri $0x1a,(%rsi,%rdx), %xmm0
> +# else
> + movdqa (%rsi,%rdx), %xmm1
> + TOLOWER (%xmm0, %xmm1)
> + pcmpistri $0x1a, %xmm1, %xmm0
> +# endif
> + .p2align 4
> +LABEL(exit_use):
> + jnc LABEL(strcmp_exitz)
> +# if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L
> + sub %rcx, %r11
> + jbe LABEL(strcmp_exitz)
> +# endif
> + add %rcx, %rdx
> + lea -16(%rdi, %r9), %rdi
> + movzbl (%rdi, %rdx), %eax
> + movzbl (%rsi, %rdx), %edx
> + test %r8d, %r8d
> + jz LABEL(ret_use)
> + xchg %eax, %edx
> +LABEL(ret_use):
> +# if defined USE_AS_STRCASECMP_L || defined USE_AS_STRNCASECMP_L
> + leaq _nl_C_LC_CTYPE_tolower+128*4(%rip), %rcx
> + movl (%rcx,%rdx,4), %edx
> + movl (%rcx,%rax,4), %eax
> +# endif
> +
> + sub %edx, %eax
> + ret
> +
> +LABEL(less32bytes):
> + lea (%rdi, %rax), %rdi /* locate the exact address for first operand(rdi) */
> + lea (%rsi, %rcx), %rsi /* locate the exact address for second operand(rsi) */
> + test %r8d, %r8d
> + jz LABEL(ret)
> + xchg %rsi, %rdi /* recover original order according to flag(%r8d) */
> +
> + .p2align 4
> +LABEL(ret):
> +LABEL(less16bytes):
> + bsf %rdx, %rdx /* find and store bit index in %rdx */
> +
> +# if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L
> + sub %rdx, %r11
> + jbe LABEL(strcmp_exitz)
> +# endif
> + movzbl (%rsi, %rdx), %ecx
> + movzbl (%rdi, %rdx), %eax
> +
> +# if defined USE_AS_STRCASECMP_L || defined USE_AS_STRNCASECMP_L
> + leaq _nl_C_LC_CTYPE_tolower+128*4(%rip), %rdx
> + movl (%rdx,%rcx,4), %ecx
> + movl (%rdx,%rax,4), %eax
> +# endif
> +
> + sub %ecx, %eax
> + ret
> +
> +LABEL(strcmp_exitz):
> + xor %eax, %eax
> + ret
> +
> + .p2align 4
> + // XXX Same as code above
> +LABEL(Byte0):
> + movzbl (%rsi), %ecx
> + movzbl (%rdi), %eax
> +
> +# if defined USE_AS_STRCASECMP_L || defined USE_AS_STRNCASECMP_L
> + leaq _nl_C_LC_CTYPE_tolower+128*4(%rip), %rdx
> + movl (%rdx,%rcx,4), %ecx
> + movl (%rdx,%rax,4), %eax
> +# endif
> +
> + sub %ecx, %eax
> + ret
> + cfi_endproc
> + .size STRCMP, .-STRCMP
> +
> +# undef UCLOW_reg
> +# undef UCHIGH_reg
> +# undef LCQWORD_reg
> +# undef TOLOWER
> +
> + /* Put all SSE 4.2 functions together. */
> + .section .rodata.SECTION,"a",@progbits
> + .p2align 3
> +LABEL(unaligned_table):
> + .int LABEL(ashr_1) - LABEL(unaligned_table)
> + .int LABEL(ashr_2) - LABEL(unaligned_table)
> + .int LABEL(ashr_3) - LABEL(unaligned_table)
> + .int LABEL(ashr_4) - LABEL(unaligned_table)
> + .int LABEL(ashr_5) - LABEL(unaligned_table)
> + .int LABEL(ashr_6) - LABEL(unaligned_table)
> + .int LABEL(ashr_7) - LABEL(unaligned_table)
> + .int LABEL(ashr_8) - LABEL(unaligned_table)
> + .int LABEL(ashr_9) - LABEL(unaligned_table)
> + .int LABEL(ashr_10) - LABEL(unaligned_table)
> + .int LABEL(ashr_11) - LABEL(unaligned_table)
> + .int LABEL(ashr_12) - LABEL(unaligned_table)
> + .int LABEL(ashr_13) - LABEL(unaligned_table)
> + .int LABEL(ashr_14) - LABEL(unaligned_table)
> + .int LABEL(ashr_15) - LABEL(unaligned_table)
> + .int LABEL(ashr_0) - LABEL(unaligned_table)
> +
> +# undef LABEL
> +# undef GLABEL
> +# undef SECTION
> +# undef movdqa
> +# undef movdqu
> +# undef pmovmskb
> +# undef pcmpistri
> +# undef psubb
> +# undef pcmpeqb
> +# undef psrldq
> +# undef pslldq
> +# undef palignr
> +# undef pxor
> +# undef D
> #endif
> diff --git a/sysdeps/x86_64/multiarch/strncase_l-sse4_2.S b/sysdeps/x86_64/multiarch/strncase_l-sse4_2.S
> index 08e23548c3..1ce5c4e93f 100644
> --- a/sysdeps/x86_64/multiarch/strncase_l-sse4_2.S
> +++ b/sysdeps/x86_64/multiarch/strncase_l-sse4_2.S
> @@ -16,6 +16,5 @@
> License along with the GNU C Library; if not, see
> <https://www.gnu.org/licenses/>. */
>
> -#define STRCMP_SSE42 __strncasecmp_l_sse42
> #define USE_AS_STRNCASECMP_L
> -#include "strcmp-sse42.S"
> +#include "strcmp-sse4_2.S"
> diff --git a/sysdeps/x86_64/multiarch/strncmp-sse4_2.S b/sysdeps/x86_64/multiarch/strncmp-sse4_2.S
> index 310a6dbe77..2a02f0c2a6 100644
> --- a/sysdeps/x86_64/multiarch/strncmp-sse4_2.S
> +++ b/sysdeps/x86_64/multiarch/strncmp-sse4_2.S
> @@ -16,8 +16,5 @@
> License along with the GNU C Library; if not, see
> <https://www.gnu.org/licenses/>. */
>
> -#if IS_IN (libc)
> -# define STRCMP_SSE42 __strncmp_sse42
> -# define USE_AS_STRNCMP
> -# include "strcmp-sse42.S"
> -#endif
> +#define USE_AS_STRNCMP
> +#include "strcmp-sse4_2.S"
> --
> 2.34.1
>
LGTM.
Thanks.
--
H.J.
next prev parent reply other threads:[~2022-07-13 0:07 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-07-12 19:28 [PATCH v1 1/4] x86: Rename STRCASECMP_NONASCII macro to STRCASECMP_L_NONASCII Noah Goldstein
2022-07-12 19:28 ` [PATCH v1 2/4] x86: Move strcmp SSE2 implementation to multiarch/strcmp-sse2.S Noah Goldstein
2022-07-12 23:57 ` H.J. Lu
2022-07-12 19:28 ` [PATCH v1 3/4] x86: Move wcscmp SSE2 implementation to multiarch/wcscmp-sse2.S Noah Goldstein
2022-07-13 0:05 ` H.J. Lu
2022-07-12 19:28 ` [PATCH v1 4/4] x86: Move strcmp SSE42 implementation to multiarch/strcmp-sse4_2.S Noah Goldstein
2022-07-13 0:07 ` H.J. Lu [this message]
2022-07-12 23:30 ` [PATCH v1 1/4] x86: Rename STRCASECMP_NONASCII macro to STRCASECMP_L_NONASCII H.J. Lu
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