mirror of
https://sourceware.org/git/glibc.git
synced 2024-11-23 05:20:06 +00:00
5a82c74822
Also, change sources.redhat.com to sourceware.org.
This patch was automatically generated by running the following shell
script, which uses GNU sed, and which avoids modifying files imported
from upstream:
sed -ri '
s,(http|ftp)(://(.*\.)?(gnu|fsf|sourceware)\.org($|[^.]|\.[^a-z])),https\2,g
s,(http|ftp)(://(.*\.)?)sources\.redhat\.com($|[^.]|\.[^a-z]),https\2sourceware.org\4,g
' \
$(find $(git ls-files) -prune -type f \
! -name '*.po' \
! -name 'ChangeLog*' \
! -path COPYING ! -path COPYING.LIB \
! -path manual/fdl-1.3.texi ! -path manual/lgpl-2.1.texi \
! -path manual/texinfo.tex ! -path scripts/config.guess \
! -path scripts/config.sub ! -path scripts/install-sh \
! -path scripts/mkinstalldirs ! -path scripts/move-if-change \
! -path INSTALL ! -path locale/programs/charmap-kw.h \
! -path po/libc.pot ! -path sysdeps/gnu/errlist.c \
! '(' -name configure \
-execdir test -f configure.ac -o -f configure.in ';' ')' \
! '(' -name preconfigure \
-execdir test -f preconfigure.ac ';' ')' \
-print)
and then by running 'make dist-prepare' to regenerate files built
from the altered files, and then executing the following to cleanup:
chmod a+x sysdeps/unix/sysv/linux/riscv/configure
# Omit irrelevant whitespace and comment-only changes,
# perhaps from a slightly-different Autoconf version.
git checkout -f \
sysdeps/csky/configure \
sysdeps/hppa/configure \
sysdeps/riscv/configure \
sysdeps/unix/sysv/linux/csky/configure
# Omit changes that caused a pre-commit check to fail like this:
# remote: *** error: sysdeps/powerpc/powerpc64/ppc-mcount.S: trailing lines
git checkout -f \
sysdeps/powerpc/powerpc64/ppc-mcount.S \
sysdeps/unix/sysv/linux/s390/s390-64/syscall.S
# Omit change that caused a pre-commit check to fail like this:
# remote: *** error: sysdeps/sparc/sparc64/multiarch/memcpy-ultra3.S: last line does not end in newline
git checkout -f sysdeps/sparc/sparc64/multiarch/memcpy-ultra3.S
2268 lines
51 KiB
ArmAsm
2268 lines
51 KiB
ArmAsm
/* Highly optimized version for x86-64.
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Copyright (C) 1999-2019 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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Based on i686 version contributed by Ulrich Drepper
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<drepper@cygnus.com>, 1999.
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Updated with SSE2 support contributed by Intel Corporation.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, see
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<https://www.gnu.org/licenses/>. */
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#include <sysdep.h>
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#include "asm-syntax.h"
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#undef UPDATE_STRNCMP_COUNTER
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#ifndef LABEL
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#define LABEL(l) L(l)
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#endif
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#ifdef USE_AS_STRNCMP
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/* Since the counter, %r11, is unsigned, we branch to strcmp_exitz
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if the new counter > the old one or is 0. */
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# define UPDATE_STRNCMP_COUNTER \
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/* calculate left number to compare */ \
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lea -16(%rcx, %r11), %r9; \
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cmp %r9, %r11; \
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jb LABEL(strcmp_exitz); \
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test %r9, %r9; \
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je LABEL(strcmp_exitz); \
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mov %r9, %r11
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#elif defined USE_AS_STRCASECMP_L
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# include "locale-defines.h"
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# define UPDATE_STRNCMP_COUNTER
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#elif defined USE_AS_STRNCASECMP_L
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# include "locale-defines.h"
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# define UPDATE_STRNCMP_COUNTER \
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/* calculate left number to compare */ \
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lea -16(%rcx, %r11), %r9; \
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cmp %r9, %r11; \
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jb LABEL(strcmp_exitz); \
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test %r9, %r9; \
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je LABEL(strcmp_exitz); \
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mov %r9, %r11
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#else
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# define UPDATE_STRNCMP_COUNTER
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# ifndef STRCMP
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# define STRCMP strcmp
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# endif
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#endif
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#ifndef USE_SSSE3
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.text
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#else
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.section .text.ssse3,"ax",@progbits
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#endif
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#ifdef USE_AS_STRCASECMP_L
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# ifndef ENTRY2
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# define ENTRY2(name) ENTRY (name)
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# define END2(name) END (name)
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# endif
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ENTRY2 (__strcasecmp)
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movq __libc_tsd_LOCALE@gottpoff(%rip),%rax
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mov %fs:(%rax),%RDX_LP
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// XXX 5 byte should be before the function
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/* 5-byte NOP. */
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.byte 0x0f,0x1f,0x44,0x00,0x00
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END2 (__strcasecmp)
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# ifndef NO_NOLOCALE_ALIAS
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weak_alias (__strcasecmp, strcasecmp)
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libc_hidden_def (__strcasecmp)
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# endif
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/* FALLTHROUGH to strcasecmp_l. */
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#elif defined USE_AS_STRNCASECMP_L
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# ifndef ENTRY2
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# define ENTRY2(name) ENTRY (name)
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# define END2(name) END (name)
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# endif
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ENTRY2 (__strncasecmp)
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movq __libc_tsd_LOCALE@gottpoff(%rip),%rax
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mov %fs:(%rax),%RCX_LP
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// XXX 5 byte should be before the function
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/* 5-byte NOP. */
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.byte 0x0f,0x1f,0x44,0x00,0x00
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END2 (__strncasecmp)
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# ifndef NO_NOLOCALE_ALIAS
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weak_alias (__strncasecmp, strncasecmp)
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libc_hidden_def (__strncasecmp)
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# endif
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/* FALLTHROUGH to strncasecmp_l. */
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#endif
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ENTRY (STRCMP)
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#ifdef USE_AS_STRCASECMP_L
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/* We have to fall back on the C implementation for locales
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with encodings not matching ASCII for single bytes. */
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# if LOCALE_T___LOCALES != 0 || LC_CTYPE != 0
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mov LOCALE_T___LOCALES+LC_CTYPE*LP_SIZE(%rdx), %RAX_LP
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# else
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mov (%rdx), %RAX_LP
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# endif
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testl $1, LOCALE_DATA_VALUES+_NL_CTYPE_NONASCII_CASE*SIZEOF_VALUES(%rax)
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jne __strcasecmp_l_nonascii
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#elif defined USE_AS_STRNCASECMP_L
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/* We have to fall back on the C implementation for locales
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with encodings not matching ASCII for single bytes. */
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# if LOCALE_T___LOCALES != 0 || LC_CTYPE != 0
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mov LOCALE_T___LOCALES+LC_CTYPE*LP_SIZE(%rcx), %RAX_LP
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# else
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mov (%rcx), %RAX_LP
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# endif
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testl $1, LOCALE_DATA_VALUES+_NL_CTYPE_NONASCII_CASE*SIZEOF_VALUES(%rax)
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jne __strncasecmp_l_nonascii
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#endif
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/*
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* This implementation uses SSE to compare up to 16 bytes at a time.
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*/
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#if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L
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test %RDX_LP, %RDX_LP
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je LABEL(strcmp_exitz)
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cmp $1, %RDX_LP
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je LABEL(Byte0)
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mov %RDX_LP, %R11_LP
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#endif
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mov %esi, %ecx
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mov %edi, %eax
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/* Use 64bit AND here to avoid long NOP padding. */
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and $0x3f, %rcx /* rsi alignment in cache line */
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and $0x3f, %rax /* rdi alignment in cache line */
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#if defined USE_AS_STRCASECMP_L || defined USE_AS_STRNCASECMP_L
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.section .rodata.cst16,"aM",@progbits,16
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.align 16
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.Lbelowupper:
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.quad 0x4040404040404040
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.quad 0x4040404040404040
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.Ltopupper:
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.quad 0x5b5b5b5b5b5b5b5b
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.quad 0x5b5b5b5b5b5b5b5b
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.Ltouppermask:
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.quad 0x2020202020202020
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.quad 0x2020202020202020
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.previous
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movdqa .Lbelowupper(%rip), %xmm5
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# define UCLOW_reg %xmm5
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movdqa .Ltopupper(%rip), %xmm6
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# define UCHIGH_reg %xmm6
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movdqa .Ltouppermask(%rip), %xmm7
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# define LCQWORD_reg %xmm7
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#endif
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cmp $0x30, %ecx
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ja LABEL(crosscache) /* rsi: 16-byte load will cross cache line */
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cmp $0x30, %eax
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ja LABEL(crosscache) /* rdi: 16-byte load will cross cache line */
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movlpd (%rdi), %xmm1
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movlpd (%rsi), %xmm2
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movhpd 8(%rdi), %xmm1
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movhpd 8(%rsi), %xmm2
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#if defined USE_AS_STRCASECMP_L || defined USE_AS_STRNCASECMP_L
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# define TOLOWER(reg1, reg2) \
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movdqa reg1, %xmm8; \
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movdqa UCHIGH_reg, %xmm9; \
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movdqa reg2, %xmm10; \
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movdqa UCHIGH_reg, %xmm11; \
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pcmpgtb UCLOW_reg, %xmm8; \
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pcmpgtb reg1, %xmm9; \
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pcmpgtb UCLOW_reg, %xmm10; \
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pcmpgtb reg2, %xmm11; \
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pand %xmm9, %xmm8; \
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pand %xmm11, %xmm10; \
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pand LCQWORD_reg, %xmm8; \
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pand LCQWORD_reg, %xmm10; \
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por %xmm8, reg1; \
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por %xmm10, reg2
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TOLOWER (%xmm1, %xmm2)
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#else
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# define TOLOWER(reg1, reg2)
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#endif
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pxor %xmm0, %xmm0 /* clear %xmm0 for null char checks */
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pcmpeqb %xmm1, %xmm0 /* Any null chars? */
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pcmpeqb %xmm2, %xmm1 /* compare first 16 bytes for equality */
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psubb %xmm0, %xmm1 /* packed sub of comparison results*/
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pmovmskb %xmm1, %edx
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sub $0xffff, %edx /* if first 16 bytes are same, edx == 0xffff */
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jnz LABEL(less16bytes) /* If not, find different value or null char */
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#if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L
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sub $16, %r11
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jbe LABEL(strcmp_exitz) /* finish comparision */
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#endif
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add $16, %rsi /* prepare to search next 16 bytes */
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add $16, %rdi /* prepare to search next 16 bytes */
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/*
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* Determine source and destination string offsets from 16-byte alignment.
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* Use relative offset difference between the two to determine which case
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* below to use.
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*/
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.p2align 4
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LABEL(crosscache):
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and $0xfffffffffffffff0, %rsi /* force %rsi is 16 byte aligned */
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and $0xfffffffffffffff0, %rdi /* force %rdi is 16 byte aligned */
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mov $0xffff, %edx /* for equivalent offset */
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xor %r8d, %r8d
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and $0xf, %ecx /* offset of rsi */
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and $0xf, %eax /* offset of rdi */
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cmp %eax, %ecx
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je LABEL(ashr_0) /* rsi and rdi relative offset same */
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ja LABEL(bigger)
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mov %edx, %r8d /* r8d is offset flag for exit tail */
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xchg %ecx, %eax
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xchg %rsi, %rdi
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LABEL(bigger):
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lea 15(%rax), %r9
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sub %rcx, %r9
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lea LABEL(unaligned_table)(%rip), %r10
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movslq (%r10, %r9,4), %r9
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lea (%r10, %r9), %r10
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_CET_NOTRACK jmp *%r10 /* jump to corresponding case */
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/*
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* The following cases will be handled by ashr_0
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* rcx(offset of rsi) rax(offset of rdi) relative offset corresponding case
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* n(0~15) n(0~15) 15(15+ n-n) ashr_0
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*/
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.p2align 4
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LABEL(ashr_0):
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movdqa (%rsi), %xmm1
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pxor %xmm0, %xmm0 /* clear %xmm0 for null char check */
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pcmpeqb %xmm1, %xmm0 /* Any null chars? */
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#if !defined USE_AS_STRCASECMP_L && !defined USE_AS_STRNCASECMP_L
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pcmpeqb (%rdi), %xmm1 /* compare 16 bytes for equality */
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#else
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movdqa (%rdi), %xmm2
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TOLOWER (%xmm1, %xmm2)
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pcmpeqb %xmm2, %xmm1 /* compare 16 bytes for equality */
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#endif
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psubb %xmm0, %xmm1 /* packed sub of comparison results*/
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pmovmskb %xmm1, %r9d
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shr %cl, %edx /* adjust 0xffff for offset */
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shr %cl, %r9d /* adjust for 16-byte offset */
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sub %r9d, %edx
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/*
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* edx must be the same with r9d if in left byte (16-rcx) is equal to
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* the start from (16-rax) and no null char was seen.
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*/
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jne LABEL(less32bytes) /* mismatch or null char */
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UPDATE_STRNCMP_COUNTER
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mov $16, %rcx
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mov $16, %r9
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pxor %xmm0, %xmm0 /* clear xmm0, may have changed above */
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/*
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* Now both strings are aligned at 16-byte boundary. Loop over strings
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* checking 32-bytes per iteration.
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*/
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.p2align 4
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LABEL(loop_ashr_0):
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movdqa (%rsi, %rcx), %xmm1
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movdqa (%rdi, %rcx), %xmm2
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TOLOWER (%xmm1, %xmm2)
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pcmpeqb %xmm1, %xmm0
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pcmpeqb %xmm2, %xmm1
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psubb %xmm0, %xmm1
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pmovmskb %xmm1, %edx
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sub $0xffff, %edx
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jnz LABEL(exit) /* mismatch or null char seen */
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#if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L
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sub $16, %r11
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jbe LABEL(strcmp_exitz)
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#endif
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add $16, %rcx
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movdqa (%rsi, %rcx), %xmm1
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movdqa (%rdi, %rcx), %xmm2
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TOLOWER (%xmm1, %xmm2)
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pcmpeqb %xmm1, %xmm0
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pcmpeqb %xmm2, %xmm1
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psubb %xmm0, %xmm1
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pmovmskb %xmm1, %edx
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sub $0xffff, %edx
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jnz LABEL(exit)
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#if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L
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sub $16, %r11
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jbe LABEL(strcmp_exitz)
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#endif
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add $16, %rcx
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jmp LABEL(loop_ashr_0)
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/*
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* The following cases will be handled by ashr_1
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* rcx(offset of rsi) rax(offset of rdi) relative offset corresponding case
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|
* n(15) n -15 0(15 +(n-15) - n) ashr_1
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*/
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|
.p2align 4
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LABEL(ashr_1):
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pxor %xmm0, %xmm0
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movdqa (%rdi), %xmm2
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movdqa (%rsi), %xmm1
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pcmpeqb %xmm1, %xmm0 /* Any null chars? */
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pslldq $15, %xmm2 /* shift first string to align with second */
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TOLOWER (%xmm1, %xmm2)
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pcmpeqb %xmm1, %xmm2 /* compare 16 bytes for equality */
|
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psubb %xmm0, %xmm2 /* packed sub of comparison results*/
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pmovmskb %xmm2, %r9d
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shr %cl, %edx /* adjust 0xffff for offset */
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shr %cl, %r9d /* adjust for 16-byte offset */
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sub %r9d, %edx
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jnz LABEL(less32bytes) /* mismatch or null char seen */
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movdqa (%rdi), %xmm3
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UPDATE_STRNCMP_COUNTER
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|
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pxor %xmm0, %xmm0
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mov $16, %rcx /* index for loads*/
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mov $1, %r9d /* byte position left over from less32bytes case */
|
|
/*
|
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* 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
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|
and $0xfff, %r10 /* offset into 4K page */
|
|
sub $0x1000, %r10 /* subtract 4K pagesize */
|
|
|
|
.p2align 4
|
|
LABEL(loop_ashr_1):
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|
add $16, %r10
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|
jg LABEL(nibble_ashr_1) /* cross page boundary */
|
|
|
|
LABEL(gobble_ashr_1):
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|
movdqa (%rsi, %rcx), %xmm1
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|
movdqa (%rdi, %rcx), %xmm2
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|
movdqa %xmm2, %xmm4 /* store for next cycle */
|
|
|
|
#ifndef USE_SSSE3
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|
psrldq $1, %xmm3
|
|
pslldq $15, %xmm2
|
|
por %xmm3, %xmm2 /* merge into one 16byte value */
|
|
#else
|
|
palignr $1, %xmm3, %xmm2 /* merge into one 16byte value */
|
|
#endif
|
|
TOLOWER (%xmm1, %xmm2)
|
|
|
|
pcmpeqb %xmm1, %xmm0
|
|
pcmpeqb %xmm2, %xmm1
|
|
psubb %xmm0, %xmm1
|
|
pmovmskb %xmm1, %edx
|
|
sub $0xffff, %edx
|
|
jnz LABEL(exit)
|
|
|
|
#if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L
|
|
sub $16, %r11
|
|
jbe LABEL(strcmp_exitz)
|
|
#endif
|
|
add $16, %rcx
|
|
movdqa %xmm4, %xmm3
|
|
|
|
add $16, %r10
|
|
jg LABEL(nibble_ashr_1) /* cross page boundary */
|
|
|
|
movdqa (%rsi, %rcx), %xmm1
|
|
movdqa (%rdi, %rcx), %xmm2
|
|
movdqa %xmm2, %xmm4 /* store for next cycle */
|
|
|
|
#ifndef USE_SSSE3
|
|
psrldq $1, %xmm3
|
|
pslldq $15, %xmm2
|
|
por %xmm3, %xmm2 /* merge into one 16byte value */
|
|
#else
|
|
palignr $1, %xmm3, %xmm2 /* merge into one 16byte value */
|
|
#endif
|
|
TOLOWER (%xmm1, %xmm2)
|
|
|
|
pcmpeqb %xmm1, %xmm0
|
|
pcmpeqb %xmm2, %xmm1
|
|
psubb %xmm0, %xmm1
|
|
pmovmskb %xmm1, %edx
|
|
sub $0xffff, %edx
|
|
jnz LABEL(exit)
|
|
|
|
#if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L
|
|
sub $16, %r11
|
|
jbe LABEL(strcmp_exitz)
|
|
#endif
|
|
add $16, %rcx
|
|
movdqa %xmm4, %xmm3
|
|
jmp LABEL(loop_ashr_1)
|
|
|
|
/*
|
|
* Nibble avoids loads across page boundary. This is to avoid a potential
|
|
* access into unmapped memory.
|
|
*/
|
|
.p2align 4
|
|
LABEL(nibble_ashr_1):
|
|
pcmpeqb %xmm3, %xmm0 /* check nibble for null char*/
|
|
pmovmskb %xmm0, %edx
|
|
test $0xfffe, %edx
|
|
jnz LABEL(ashr_1_exittail) /* find null char*/
|
|
|
|
#if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L
|
|
cmp $15, %r11
|
|
jbe LABEL(ashr_1_exittail)
|
|
#endif
|
|
|
|
pxor %xmm0, %xmm0
|
|
sub $0x1000, %r10 /* substract 4K from %r10 */
|
|
jmp LABEL(gobble_ashr_1)
|
|
|
|
/*
|
|
* Once find null char, determine if there is a string mismatch
|
|
* before the null char.
|
|
*/
|
|
.p2align 4
|
|
LABEL(ashr_1_exittail):
|
|
movdqa (%rsi, %rcx), %xmm1
|
|
psrldq $1, %xmm0
|
|
psrldq $1, %xmm3
|
|
jmp LABEL(aftertail)
|
|
|
|
/*
|
|
* 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):
|
|
pxor %xmm0, %xmm0
|
|
movdqa (%rdi), %xmm2
|
|
movdqa (%rsi), %xmm1
|
|
pcmpeqb %xmm1, %xmm0
|
|
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
|
|
|
|
pxor %xmm0, %xmm0
|
|
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 */
|
|
|
|
.p2align 4
|
|
LABEL(loop_ashr_2):
|
|
add $16, %r10
|
|
jg LABEL(nibble_ashr_2)
|
|
|
|
LABEL(gobble_ashr_2):
|
|
movdqa (%rsi, %rcx), %xmm1
|
|
movdqa (%rdi, %rcx), %xmm2
|
|
movdqa %xmm2, %xmm4
|
|
|
|
#ifndef USE_SSSE3
|
|
psrldq $2, %xmm3
|
|
pslldq $14, %xmm2
|
|
por %xmm3, %xmm2 /* merge into one 16byte value */
|
|
#else
|
|
palignr $2, %xmm3, %xmm2 /* merge into one 16byte value */
|
|
#endif
|
|
TOLOWER (%xmm1, %xmm2)
|
|
|
|
pcmpeqb %xmm1, %xmm0
|
|
pcmpeqb %xmm2, %xmm1
|
|
psubb %xmm0, %xmm1
|
|
pmovmskb %xmm1, %edx
|
|
sub $0xffff, %edx
|
|
jnz LABEL(exit)
|
|
|
|
#if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L
|
|
sub $16, %r11
|
|
jbe LABEL(strcmp_exitz)
|
|
#endif
|
|
|
|
add $16, %rcx
|
|
movdqa %xmm4, %xmm3
|
|
|
|
add $16, %r10
|
|
jg LABEL(nibble_ashr_2) /* cross page boundary */
|
|
|
|
movdqa (%rsi, %rcx), %xmm1
|
|
movdqa (%rdi, %rcx), %xmm2
|
|
movdqa %xmm2, %xmm4
|
|
|
|
#ifndef USE_SSSE3
|
|
psrldq $2, %xmm3
|
|
pslldq $14, %xmm2
|
|
por %xmm3, %xmm2 /* merge into one 16byte value */
|
|
#else
|
|
palignr $2, %xmm3, %xmm2 /* merge into one 16byte value */
|
|
#endif
|
|
TOLOWER (%xmm1, %xmm2)
|
|
|
|
pcmpeqb %xmm1, %xmm0
|
|
pcmpeqb %xmm2, %xmm1
|
|
psubb %xmm0, %xmm1
|
|
pmovmskb %xmm1, %edx
|
|
sub $0xffff, %edx
|
|
jnz LABEL(exit)
|
|
|
|
#if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L
|
|
sub $16, %r11
|
|
jbe LABEL(strcmp_exitz)
|
|
#endif
|
|
|
|
add $16, %rcx
|
|
movdqa %xmm4, %xmm3
|
|
jmp LABEL(loop_ashr_2)
|
|
|
|
.p2align 4
|
|
LABEL(nibble_ashr_2):
|
|
pcmpeqb %xmm3, %xmm0 /* check nibble for null char */
|
|
pmovmskb %xmm0, %edx
|
|
test $0xfffc, %edx
|
|
jnz LABEL(ashr_2_exittail)
|
|
|
|
#if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L
|
|
cmp $14, %r11
|
|
jbe LABEL(ashr_2_exittail)
|
|
#endif
|
|
|
|
pxor %xmm0, %xmm0
|
|
sub $0x1000, %r10
|
|
jmp LABEL(gobble_ashr_2)
|
|
|
|
.p2align 4
|
|
LABEL(ashr_2_exittail):
|
|
movdqa (%rsi, %rcx), %xmm1
|
|
psrldq $2, %xmm0
|
|
psrldq $2, %xmm3
|
|
jmp LABEL(aftertail)
|
|
|
|
/*
|
|
* 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):
|
|
pxor %xmm0, %xmm0
|
|
movdqa (%rdi), %xmm2
|
|
movdqa (%rsi), %xmm1
|
|
pcmpeqb %xmm1, %xmm0
|
|
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
|
|
|
|
pxor %xmm0, %xmm0
|
|
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 */
|
|
|
|
.p2align 4
|
|
LABEL(loop_ashr_3):
|
|
add $16, %r10
|
|
jg LABEL(nibble_ashr_3)
|
|
|
|
LABEL(gobble_ashr_3):
|
|
movdqa (%rsi, %rcx), %xmm1
|
|
movdqa (%rdi, %rcx), %xmm2
|
|
movdqa %xmm2, %xmm4
|
|
|
|
#ifndef USE_SSSE3
|
|
psrldq $3, %xmm3
|
|
pslldq $13, %xmm2
|
|
por %xmm3, %xmm2 /* merge into one 16byte value */
|
|
#else
|
|
palignr $3, %xmm3, %xmm2 /* merge into one 16byte value */
|
|
#endif
|
|
TOLOWER (%xmm1, %xmm2)
|
|
|
|
pcmpeqb %xmm1, %xmm0
|
|
pcmpeqb %xmm2, %xmm1
|
|
psubb %xmm0, %xmm1
|
|
pmovmskb %xmm1, %edx
|
|
sub $0xffff, %edx
|
|
jnz LABEL(exit)
|
|
|
|
#if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L
|
|
sub $16, %r11
|
|
jbe LABEL(strcmp_exitz)
|
|
#endif
|
|
|
|
add $16, %rcx
|
|
movdqa %xmm4, %xmm3
|
|
|
|
add $16, %r10
|
|
jg LABEL(nibble_ashr_3) /* cross page boundary */
|
|
|
|
movdqa (%rsi, %rcx), %xmm1
|
|
movdqa (%rdi, %rcx), %xmm2
|
|
movdqa %xmm2, %xmm4
|
|
|
|
#ifndef USE_SSSE3
|
|
psrldq $3, %xmm3
|
|
pslldq $13, %xmm2
|
|
por %xmm3, %xmm2 /* merge into one 16byte value */
|
|
#else
|
|
palignr $3, %xmm3, %xmm2 /* merge into one 16byte value */
|
|
#endif
|
|
TOLOWER (%xmm1, %xmm2)
|
|
|
|
pcmpeqb %xmm1, %xmm0
|
|
pcmpeqb %xmm2, %xmm1
|
|
psubb %xmm0, %xmm1
|
|
pmovmskb %xmm1, %edx
|
|
sub $0xffff, %edx
|
|
jnz LABEL(exit)
|
|
|
|
#if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L
|
|
sub $16, %r11
|
|
jbe LABEL(strcmp_exitz)
|
|
#endif
|
|
|
|
add $16, %rcx
|
|
movdqa %xmm4, %xmm3
|
|
jmp LABEL(loop_ashr_3)
|
|
|
|
.p2align 4
|
|
LABEL(nibble_ashr_3):
|
|
pcmpeqb %xmm3, %xmm0 /* check nibble for null char */
|
|
pmovmskb %xmm0, %edx
|
|
test $0xfff8, %edx
|
|
jnz LABEL(ashr_3_exittail)
|
|
|
|
#if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L
|
|
cmp $13, %r11
|
|
jbe LABEL(ashr_3_exittail)
|
|
#endif
|
|
|
|
pxor %xmm0, %xmm0
|
|
sub $0x1000, %r10
|
|
jmp LABEL(gobble_ashr_3)
|
|
|
|
.p2align 4
|
|
LABEL(ashr_3_exittail):
|
|
movdqa (%rsi, %rcx), %xmm1
|
|
psrldq $3, %xmm0
|
|
psrldq $3, %xmm3
|
|
jmp LABEL(aftertail)
|
|
|
|
/*
|
|
* 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):
|
|
pxor %xmm0, %xmm0
|
|
movdqa (%rdi), %xmm2
|
|
movdqa (%rsi), %xmm1
|
|
pcmpeqb %xmm1, %xmm0
|
|
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
|
|
|
|
pxor %xmm0, %xmm0
|
|
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 */
|
|
|
|
.p2align 4
|
|
LABEL(loop_ashr_4):
|
|
add $16, %r10
|
|
jg LABEL(nibble_ashr_4)
|
|
|
|
LABEL(gobble_ashr_4):
|
|
movdqa (%rsi, %rcx), %xmm1
|
|
movdqa (%rdi, %rcx), %xmm2
|
|
movdqa %xmm2, %xmm4
|
|
|
|
#ifndef USE_SSSE3
|
|
psrldq $4, %xmm3
|
|
pslldq $12, %xmm2
|
|
por %xmm3, %xmm2 /* merge into one 16byte value */
|
|
#else
|
|
palignr $4, %xmm3, %xmm2 /* merge into one 16byte value */
|
|
#endif
|
|
TOLOWER (%xmm1, %xmm2)
|
|
|
|
pcmpeqb %xmm1, %xmm0
|
|
pcmpeqb %xmm2, %xmm1
|
|
psubb %xmm0, %xmm1
|
|
pmovmskb %xmm1, %edx
|
|
sub $0xffff, %edx
|
|
jnz LABEL(exit)
|
|
|
|
#if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L
|
|
sub $16, %r11
|
|
jbe LABEL(strcmp_exitz)
|
|
#endif
|
|
|
|
add $16, %rcx
|
|
movdqa %xmm4, %xmm3
|
|
|
|
add $16, %r10
|
|
jg LABEL(nibble_ashr_4) /* cross page boundary */
|
|
|
|
movdqa (%rsi, %rcx), %xmm1
|
|
movdqa (%rdi, %rcx), %xmm2
|
|
movdqa %xmm2, %xmm4
|
|
|
|
#ifndef USE_SSSE3
|
|
psrldq $4, %xmm3
|
|
pslldq $12, %xmm2
|
|
por %xmm3, %xmm2 /* merge into one 16byte value */
|
|
#else
|
|
palignr $4, %xmm3, %xmm2 /* merge into one 16byte value */
|
|
#endif
|
|
TOLOWER (%xmm1, %xmm2)
|
|
|
|
pcmpeqb %xmm1, %xmm0
|
|
pcmpeqb %xmm2, %xmm1
|
|
psubb %xmm0, %xmm1
|
|
pmovmskb %xmm1, %edx
|
|
sub $0xffff, %edx
|
|
jnz LABEL(exit)
|
|
|
|
#if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L
|
|
sub $16, %r11
|
|
jbe LABEL(strcmp_exitz)
|
|
#endif
|
|
|
|
add $16, %rcx
|
|
movdqa %xmm4, %xmm3
|
|
jmp LABEL(loop_ashr_4)
|
|
|
|
.p2align 4
|
|
LABEL(nibble_ashr_4):
|
|
pcmpeqb %xmm3, %xmm0 /* check nibble for null char */
|
|
pmovmskb %xmm0, %edx
|
|
test $0xfff0, %edx
|
|
jnz LABEL(ashr_4_exittail)
|
|
|
|
#if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L
|
|
cmp $12, %r11
|
|
jbe LABEL(ashr_4_exittail)
|
|
#endif
|
|
|
|
pxor %xmm0, %xmm0
|
|
sub $0x1000, %r10
|
|
jmp LABEL(gobble_ashr_4)
|
|
|
|
.p2align 4
|
|
LABEL(ashr_4_exittail):
|
|
movdqa (%rsi, %rcx), %xmm1
|
|
psrldq $4, %xmm0
|
|
psrldq $4, %xmm3
|
|
jmp LABEL(aftertail)
|
|
|
|
/*
|
|
* 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):
|
|
pxor %xmm0, %xmm0
|
|
movdqa (%rdi), %xmm2
|
|
movdqa (%rsi), %xmm1
|
|
pcmpeqb %xmm1, %xmm0
|
|
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
|
|
|
|
pxor %xmm0, %xmm0
|
|
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 */
|
|
|
|
.p2align 4
|
|
LABEL(loop_ashr_5):
|
|
add $16, %r10
|
|
jg LABEL(nibble_ashr_5)
|
|
|
|
LABEL(gobble_ashr_5):
|
|
movdqa (%rsi, %rcx), %xmm1
|
|
movdqa (%rdi, %rcx), %xmm2
|
|
movdqa %xmm2, %xmm4
|
|
|
|
#ifndef USE_SSSE3
|
|
psrldq $5, %xmm3
|
|
pslldq $11, %xmm2
|
|
por %xmm3, %xmm2 /* merge into one 16byte value */
|
|
#else
|
|
palignr $5, %xmm3, %xmm2 /* merge into one 16byte value */
|
|
#endif
|
|
TOLOWER (%xmm1, %xmm2)
|
|
|
|
pcmpeqb %xmm1, %xmm0
|
|
pcmpeqb %xmm2, %xmm1
|
|
psubb %xmm0, %xmm1
|
|
pmovmskb %xmm1, %edx
|
|
sub $0xffff, %edx
|
|
jnz LABEL(exit)
|
|
|
|
#if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L
|
|
sub $16, %r11
|
|
jbe LABEL(strcmp_exitz)
|
|
#endif
|
|
|
|
add $16, %rcx
|
|
movdqa %xmm4, %xmm3
|
|
|
|
add $16, %r10
|
|
jg LABEL(nibble_ashr_5) /* cross page boundary */
|
|
|
|
movdqa (%rsi, %rcx), %xmm1
|
|
movdqa (%rdi, %rcx), %xmm2
|
|
movdqa %xmm2, %xmm4
|
|
|
|
#ifndef USE_SSSE3
|
|
psrldq $5, %xmm3
|
|
pslldq $11, %xmm2
|
|
por %xmm3, %xmm2 /* merge into one 16byte value */
|
|
#else
|
|
palignr $5, %xmm3, %xmm2 /* merge into one 16byte value */
|
|
#endif
|
|
TOLOWER (%xmm1, %xmm2)
|
|
|
|
pcmpeqb %xmm1, %xmm0
|
|
pcmpeqb %xmm2, %xmm1
|
|
psubb %xmm0, %xmm1
|
|
pmovmskb %xmm1, %edx
|
|
sub $0xffff, %edx
|
|
jnz LABEL(exit)
|
|
|
|
#if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L
|
|
sub $16, %r11
|
|
jbe LABEL(strcmp_exitz)
|
|
#endif
|
|
|
|
add $16, %rcx
|
|
movdqa %xmm4, %xmm3
|
|
jmp LABEL(loop_ashr_5)
|
|
|
|
.p2align 4
|
|
LABEL(nibble_ashr_5):
|
|
pcmpeqb %xmm3, %xmm0 /* check nibble for null char */
|
|
pmovmskb %xmm0, %edx
|
|
test $0xffe0, %edx
|
|
jnz LABEL(ashr_5_exittail)
|
|
|
|
#if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L
|
|
cmp $11, %r11
|
|
jbe LABEL(ashr_5_exittail)
|
|
#endif
|
|
|
|
pxor %xmm0, %xmm0
|
|
sub $0x1000, %r10
|
|
jmp LABEL(gobble_ashr_5)
|
|
|
|
.p2align 4
|
|
LABEL(ashr_5_exittail):
|
|
movdqa (%rsi, %rcx), %xmm1
|
|
psrldq $5, %xmm0
|
|
psrldq $5, %xmm3
|
|
jmp LABEL(aftertail)
|
|
|
|
/*
|
|
* 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):
|
|
pxor %xmm0, %xmm0
|
|
movdqa (%rdi), %xmm2
|
|
movdqa (%rsi), %xmm1
|
|
pcmpeqb %xmm1, %xmm0
|
|
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
|
|
|
|
pxor %xmm0, %xmm0
|
|
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 */
|
|
|
|
.p2align 4
|
|
LABEL(loop_ashr_6):
|
|
add $16, %r10
|
|
jg LABEL(nibble_ashr_6)
|
|
|
|
LABEL(gobble_ashr_6):
|
|
movdqa (%rsi, %rcx), %xmm1
|
|
movdqa (%rdi, %rcx), %xmm2
|
|
movdqa %xmm2, %xmm4
|
|
|
|
#ifndef USE_SSSE3
|
|
psrldq $6, %xmm3
|
|
pslldq $10, %xmm2
|
|
por %xmm3, %xmm2 /* merge into one 16byte value */
|
|
#else
|
|
palignr $6, %xmm3, %xmm2 /* merge into one 16byte value */
|
|
#endif
|
|
TOLOWER (%xmm1, %xmm2)
|
|
|
|
pcmpeqb %xmm1, %xmm0
|
|
pcmpeqb %xmm2, %xmm1
|
|
psubb %xmm0, %xmm1
|
|
pmovmskb %xmm1, %edx
|
|
sub $0xffff, %edx
|
|
jnz LABEL(exit)
|
|
|
|
#if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L
|
|
sub $16, %r11
|
|
jbe LABEL(strcmp_exitz)
|
|
#endif
|
|
|
|
add $16, %rcx
|
|
movdqa %xmm4, %xmm3
|
|
|
|
add $16, %r10
|
|
jg LABEL(nibble_ashr_6) /* cross page boundary */
|
|
|
|
movdqa (%rsi, %rcx), %xmm1
|
|
movdqa (%rdi, %rcx), %xmm2
|
|
movdqa %xmm2, %xmm4
|
|
|
|
#ifndef USE_SSSE3
|
|
psrldq $6, %xmm3
|
|
pslldq $10, %xmm2
|
|
por %xmm3, %xmm2 /* merge into one 16byte value */
|
|
#else
|
|
palignr $6, %xmm3, %xmm2 /* merge into one 16byte value */
|
|
#endif
|
|
TOLOWER (%xmm1, %xmm2)
|
|
|
|
pcmpeqb %xmm1, %xmm0
|
|
pcmpeqb %xmm2, %xmm1
|
|
psubb %xmm0, %xmm1
|
|
pmovmskb %xmm1, %edx
|
|
sub $0xffff, %edx
|
|
jnz LABEL(exit)
|
|
|
|
#if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L
|
|
sub $16, %r11
|
|
jbe LABEL(strcmp_exitz)
|
|
#endif
|
|
|
|
add $16, %rcx
|
|
movdqa %xmm4, %xmm3
|
|
jmp LABEL(loop_ashr_6)
|
|
|
|
.p2align 4
|
|
LABEL(nibble_ashr_6):
|
|
pcmpeqb %xmm3, %xmm0 /* check nibble for null char */
|
|
pmovmskb %xmm0, %edx
|
|
test $0xffc0, %edx
|
|
jnz LABEL(ashr_6_exittail)
|
|
|
|
#if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L
|
|
cmp $10, %r11
|
|
jbe LABEL(ashr_6_exittail)
|
|
#endif
|
|
|
|
pxor %xmm0, %xmm0
|
|
sub $0x1000, %r10
|
|
jmp LABEL(gobble_ashr_6)
|
|
|
|
.p2align 4
|
|
LABEL(ashr_6_exittail):
|
|
movdqa (%rsi, %rcx), %xmm1
|
|
psrldq $6, %xmm0
|
|
psrldq $6, %xmm3
|
|
jmp LABEL(aftertail)
|
|
|
|
/*
|
|
* 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):
|
|
pxor %xmm0, %xmm0
|
|
movdqa (%rdi), %xmm2
|
|
movdqa (%rsi), %xmm1
|
|
pcmpeqb %xmm1, %xmm0
|
|
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
|
|
|
|
pxor %xmm0, %xmm0
|
|
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 */
|
|
|
|
.p2align 4
|
|
LABEL(loop_ashr_7):
|
|
add $16, %r10
|
|
jg LABEL(nibble_ashr_7)
|
|
|
|
LABEL(gobble_ashr_7):
|
|
movdqa (%rsi, %rcx), %xmm1
|
|
movdqa (%rdi, %rcx), %xmm2
|
|
movdqa %xmm2, %xmm4
|
|
|
|
#ifndef USE_SSSE3
|
|
psrldq $7, %xmm3
|
|
pslldq $9, %xmm2
|
|
por %xmm3, %xmm2 /* merge into one 16byte value */
|
|
#else
|
|
palignr $7, %xmm3, %xmm2 /* merge into one 16byte value */
|
|
#endif
|
|
TOLOWER (%xmm1, %xmm2)
|
|
|
|
pcmpeqb %xmm1, %xmm0
|
|
pcmpeqb %xmm2, %xmm1
|
|
psubb %xmm0, %xmm1
|
|
pmovmskb %xmm1, %edx
|
|
sub $0xffff, %edx
|
|
jnz LABEL(exit)
|
|
|
|
#if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L
|
|
sub $16, %r11
|
|
jbe LABEL(strcmp_exitz)
|
|
#endif
|
|
|
|
add $16, %rcx
|
|
movdqa %xmm4, %xmm3
|
|
|
|
add $16, %r10
|
|
jg LABEL(nibble_ashr_7) /* cross page boundary */
|
|
|
|
movdqa (%rsi, %rcx), %xmm1
|
|
movdqa (%rdi, %rcx), %xmm2
|
|
movdqa %xmm2, %xmm4
|
|
|
|
#ifndef USE_SSSE3
|
|
psrldq $7, %xmm3
|
|
pslldq $9, %xmm2
|
|
por %xmm3, %xmm2 /* merge into one 16byte value */
|
|
#else
|
|
palignr $7, %xmm3, %xmm2 /* merge into one 16byte value */
|
|
#endif
|
|
TOLOWER (%xmm1, %xmm2)
|
|
|
|
pcmpeqb %xmm1, %xmm0
|
|
pcmpeqb %xmm2, %xmm1
|
|
psubb %xmm0, %xmm1
|
|
pmovmskb %xmm1, %edx
|
|
sub $0xffff, %edx
|
|
jnz LABEL(exit)
|
|
|
|
#if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L
|
|
sub $16, %r11
|
|
jbe LABEL(strcmp_exitz)
|
|
#endif
|
|
|
|
add $16, %rcx
|
|
movdqa %xmm4, %xmm3
|
|
jmp LABEL(loop_ashr_7)
|
|
|
|
.p2align 4
|
|
LABEL(nibble_ashr_7):
|
|
pcmpeqb %xmm3, %xmm0 /* check nibble for null char */
|
|
pmovmskb %xmm0, %edx
|
|
test $0xff80, %edx
|
|
jnz LABEL(ashr_7_exittail)
|
|
|
|
#if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L
|
|
cmp $9, %r11
|
|
jbe LABEL(ashr_7_exittail)
|
|
#endif
|
|
|
|
pxor %xmm0, %xmm0
|
|
sub $0x1000, %r10
|
|
jmp LABEL(gobble_ashr_7)
|
|
|
|
.p2align 4
|
|
LABEL(ashr_7_exittail):
|
|
movdqa (%rsi, %rcx), %xmm1
|
|
psrldq $7, %xmm0
|
|
psrldq $7, %xmm3
|
|
jmp LABEL(aftertail)
|
|
|
|
/*
|
|
* 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):
|
|
pxor %xmm0, %xmm0
|
|
movdqa (%rdi), %xmm2
|
|
movdqa (%rsi), %xmm1
|
|
pcmpeqb %xmm1, %xmm0
|
|
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
|
|
|
|
pxor %xmm0, %xmm0
|
|
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 */
|
|
|
|
.p2align 4
|
|
LABEL(loop_ashr_8):
|
|
add $16, %r10
|
|
jg LABEL(nibble_ashr_8)
|
|
|
|
LABEL(gobble_ashr_8):
|
|
movdqa (%rsi, %rcx), %xmm1
|
|
movdqa (%rdi, %rcx), %xmm2
|
|
movdqa %xmm2, %xmm4
|
|
|
|
#ifndef USE_SSSE3
|
|
psrldq $8, %xmm3
|
|
pslldq $8, %xmm2
|
|
por %xmm3, %xmm2 /* merge into one 16byte value */
|
|
#else
|
|
palignr $8, %xmm3, %xmm2 /* merge into one 16byte value */
|
|
#endif
|
|
TOLOWER (%xmm1, %xmm2)
|
|
|
|
pcmpeqb %xmm1, %xmm0
|
|
pcmpeqb %xmm2, %xmm1
|
|
psubb %xmm0, %xmm1
|
|
pmovmskb %xmm1, %edx
|
|
sub $0xffff, %edx
|
|
jnz LABEL(exit)
|
|
|
|
#if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L
|
|
sub $16, %r11
|
|
jbe LABEL(strcmp_exitz)
|
|
#endif
|
|
|
|
add $16, %rcx
|
|
movdqa %xmm4, %xmm3
|
|
|
|
add $16, %r10
|
|
jg LABEL(nibble_ashr_8) /* cross page boundary */
|
|
|
|
movdqa (%rsi, %rcx), %xmm1
|
|
movdqa (%rdi, %rcx), %xmm2
|
|
movdqa %xmm2, %xmm4
|
|
|
|
#ifndef USE_SSSE3
|
|
psrldq $8, %xmm3
|
|
pslldq $8, %xmm2
|
|
por %xmm3, %xmm2 /* merge into one 16byte value */
|
|
#else
|
|
palignr $8, %xmm3, %xmm2 /* merge into one 16byte value */
|
|
#endif
|
|
TOLOWER (%xmm1, %xmm2)
|
|
|
|
pcmpeqb %xmm1, %xmm0
|
|
pcmpeqb %xmm2, %xmm1
|
|
psubb %xmm0, %xmm1
|
|
pmovmskb %xmm1, %edx
|
|
sub $0xffff, %edx
|
|
jnz LABEL(exit)
|
|
|
|
#if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L
|
|
sub $16, %r11
|
|
jbe LABEL(strcmp_exitz)
|
|
#endif
|
|
|
|
add $16, %rcx
|
|
movdqa %xmm4, %xmm3
|
|
jmp LABEL(loop_ashr_8)
|
|
|
|
.p2align 4
|
|
LABEL(nibble_ashr_8):
|
|
pcmpeqb %xmm3, %xmm0 /* check nibble for null char */
|
|
pmovmskb %xmm0, %edx
|
|
test $0xff00, %edx
|
|
jnz LABEL(ashr_8_exittail)
|
|
|
|
#if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L
|
|
cmp $8, %r11
|
|
jbe LABEL(ashr_8_exittail)
|
|
#endif
|
|
|
|
pxor %xmm0, %xmm0
|
|
sub $0x1000, %r10
|
|
jmp LABEL(gobble_ashr_8)
|
|
|
|
.p2align 4
|
|
LABEL(ashr_8_exittail):
|
|
movdqa (%rsi, %rcx), %xmm1
|
|
psrldq $8, %xmm0
|
|
psrldq $8, %xmm3
|
|
jmp LABEL(aftertail)
|
|
|
|
/*
|
|
* 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):
|
|
pxor %xmm0, %xmm0
|
|
movdqa (%rdi), %xmm2
|
|
movdqa (%rsi), %xmm1
|
|
pcmpeqb %xmm1, %xmm0
|
|
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
|
|
|
|
pxor %xmm0, %xmm0
|
|
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 */
|
|
|
|
.p2align 4
|
|
LABEL(loop_ashr_9):
|
|
add $16, %r10
|
|
jg LABEL(nibble_ashr_9)
|
|
|
|
LABEL(gobble_ashr_9):
|
|
movdqa (%rsi, %rcx), %xmm1
|
|
movdqa (%rdi, %rcx), %xmm2
|
|
movdqa %xmm2, %xmm4
|
|
|
|
#ifndef USE_SSSE3
|
|
psrldq $9, %xmm3
|
|
pslldq $7, %xmm2
|
|
por %xmm3, %xmm2 /* merge into one 16byte value */
|
|
#else
|
|
palignr $9, %xmm3, %xmm2 /* merge into one 16byte value */
|
|
#endif
|
|
TOLOWER (%xmm1, %xmm2)
|
|
|
|
pcmpeqb %xmm1, %xmm0
|
|
pcmpeqb %xmm2, %xmm1
|
|
psubb %xmm0, %xmm1
|
|
pmovmskb %xmm1, %edx
|
|
sub $0xffff, %edx
|
|
jnz LABEL(exit)
|
|
|
|
#if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L
|
|
sub $16, %r11
|
|
jbe LABEL(strcmp_exitz)
|
|
#endif
|
|
|
|
add $16, %rcx
|
|
movdqa %xmm4, %xmm3
|
|
|
|
add $16, %r10
|
|
jg LABEL(nibble_ashr_9) /* cross page boundary */
|
|
|
|
movdqa (%rsi, %rcx), %xmm1
|
|
movdqa (%rdi, %rcx), %xmm2
|
|
movdqa %xmm2, %xmm4
|
|
|
|
#ifndef USE_SSSE3
|
|
psrldq $9, %xmm3
|
|
pslldq $7, %xmm2
|
|
por %xmm3, %xmm2 /* merge into one 16byte value */
|
|
#else
|
|
palignr $9, %xmm3, %xmm2 /* merge into one 16byte value */
|
|
#endif
|
|
TOLOWER (%xmm1, %xmm2)
|
|
|
|
pcmpeqb %xmm1, %xmm0
|
|
pcmpeqb %xmm2, %xmm1
|
|
psubb %xmm0, %xmm1
|
|
pmovmskb %xmm1, %edx
|
|
sub $0xffff, %edx
|
|
jnz LABEL(exit)
|
|
|
|
#if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L
|
|
sub $16, %r11
|
|
jbe LABEL(strcmp_exitz)
|
|
#endif
|
|
|
|
add $16, %rcx
|
|
movdqa %xmm4, %xmm3 /* store for next cycle */
|
|
jmp LABEL(loop_ashr_9)
|
|
|
|
.p2align 4
|
|
LABEL(nibble_ashr_9):
|
|
pcmpeqb %xmm3, %xmm0 /* check nibble for null char */
|
|
pmovmskb %xmm0, %edx
|
|
test $0xfe00, %edx
|
|
jnz LABEL(ashr_9_exittail)
|
|
|
|
#if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L
|
|
cmp $7, %r11
|
|
jbe LABEL(ashr_9_exittail)
|
|
#endif
|
|
|
|
pxor %xmm0, %xmm0
|
|
sub $0x1000, %r10
|
|
jmp LABEL(gobble_ashr_9)
|
|
|
|
.p2align 4
|
|
LABEL(ashr_9_exittail):
|
|
movdqa (%rsi, %rcx), %xmm1
|
|
psrldq $9, %xmm0
|
|
psrldq $9, %xmm3
|
|
jmp LABEL(aftertail)
|
|
|
|
/*
|
|
* 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):
|
|
pxor %xmm0, %xmm0
|
|
movdqa (%rdi), %xmm2
|
|
movdqa (%rsi), %xmm1
|
|
pcmpeqb %xmm1, %xmm0
|
|
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
|
|
|
|
pxor %xmm0, %xmm0
|
|
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 */
|
|
|
|
.p2align 4
|
|
LABEL(loop_ashr_10):
|
|
add $16, %r10
|
|
jg LABEL(nibble_ashr_10)
|
|
|
|
LABEL(gobble_ashr_10):
|
|
movdqa (%rsi, %rcx), %xmm1
|
|
movdqa (%rdi, %rcx), %xmm2
|
|
movdqa %xmm2, %xmm4
|
|
|
|
#ifndef USE_SSSE3
|
|
psrldq $10, %xmm3
|
|
pslldq $6, %xmm2
|
|
por %xmm3, %xmm2 /* merge into one 16byte value */
|
|
#else
|
|
palignr $10, %xmm3, %xmm2 /* merge into one 16byte value */
|
|
#endif
|
|
TOLOWER (%xmm1, %xmm2)
|
|
|
|
pcmpeqb %xmm1, %xmm0
|
|
pcmpeqb %xmm2, %xmm1
|
|
psubb %xmm0, %xmm1
|
|
pmovmskb %xmm1, %edx
|
|
sub $0xffff, %edx
|
|
jnz LABEL(exit)
|
|
|
|
#if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L
|
|
sub $16, %r11
|
|
jbe LABEL(strcmp_exitz)
|
|
#endif
|
|
|
|
add $16, %rcx
|
|
movdqa %xmm4, %xmm3
|
|
|
|
add $16, %r10
|
|
jg LABEL(nibble_ashr_10) /* cross page boundary */
|
|
|
|
movdqa (%rsi, %rcx), %xmm1
|
|
movdqa (%rdi, %rcx), %xmm2
|
|
movdqa %xmm2, %xmm4
|
|
|
|
#ifndef USE_SSSE3
|
|
psrldq $10, %xmm3
|
|
pslldq $6, %xmm2
|
|
por %xmm3, %xmm2 /* merge into one 16byte value */
|
|
#else
|
|
palignr $10, %xmm3, %xmm2 /* merge into one 16byte value */
|
|
#endif
|
|
TOLOWER (%xmm1, %xmm2)
|
|
|
|
pcmpeqb %xmm1, %xmm0
|
|
pcmpeqb %xmm2, %xmm1
|
|
psubb %xmm0, %xmm1
|
|
pmovmskb %xmm1, %edx
|
|
sub $0xffff, %edx
|
|
jnz LABEL(exit)
|
|
|
|
#if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L
|
|
sub $16, %r11
|
|
jbe LABEL(strcmp_exitz)
|
|
#endif
|
|
|
|
add $16, %rcx
|
|
movdqa %xmm4, %xmm3
|
|
jmp LABEL(loop_ashr_10)
|
|
|
|
.p2align 4
|
|
LABEL(nibble_ashr_10):
|
|
pcmpeqb %xmm3, %xmm0 /* check nibble for null char */
|
|
pmovmskb %xmm0, %edx
|
|
test $0xfc00, %edx
|
|
jnz LABEL(ashr_10_exittail)
|
|
|
|
#if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L
|
|
cmp $6, %r11
|
|
jbe LABEL(ashr_10_exittail)
|
|
#endif
|
|
|
|
pxor %xmm0, %xmm0
|
|
sub $0x1000, %r10
|
|
jmp LABEL(gobble_ashr_10)
|
|
|
|
.p2align 4
|
|
LABEL(ashr_10_exittail):
|
|
movdqa (%rsi, %rcx), %xmm1
|
|
psrldq $10, %xmm0
|
|
psrldq $10, %xmm3
|
|
jmp LABEL(aftertail)
|
|
|
|
/*
|
|
* 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):
|
|
pxor %xmm0, %xmm0
|
|
movdqa (%rdi), %xmm2
|
|
movdqa (%rsi), %xmm1
|
|
pcmpeqb %xmm1, %xmm0
|
|
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
|
|
|
|
pxor %xmm0, %xmm0
|
|
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 */
|
|
|
|
.p2align 4
|
|
LABEL(loop_ashr_11):
|
|
add $16, %r10
|
|
jg LABEL(nibble_ashr_11)
|
|
|
|
LABEL(gobble_ashr_11):
|
|
movdqa (%rsi, %rcx), %xmm1
|
|
movdqa (%rdi, %rcx), %xmm2
|
|
movdqa %xmm2, %xmm4
|
|
|
|
#ifndef USE_SSSE3
|
|
psrldq $11, %xmm3
|
|
pslldq $5, %xmm2
|
|
por %xmm3, %xmm2 /* merge into one 16byte value */
|
|
#else
|
|
palignr $11, %xmm3, %xmm2 /* merge into one 16byte value */
|
|
#endif
|
|
TOLOWER (%xmm1, %xmm2)
|
|
|
|
pcmpeqb %xmm1, %xmm0
|
|
pcmpeqb %xmm2, %xmm1
|
|
psubb %xmm0, %xmm1
|
|
pmovmskb %xmm1, %edx
|
|
sub $0xffff, %edx
|
|
jnz LABEL(exit)
|
|
|
|
#if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L
|
|
sub $16, %r11
|
|
jbe LABEL(strcmp_exitz)
|
|
#endif
|
|
|
|
add $16, %rcx
|
|
movdqa %xmm4, %xmm3
|
|
|
|
add $16, %r10
|
|
jg LABEL(nibble_ashr_11) /* cross page boundary */
|
|
|
|
movdqa (%rsi, %rcx), %xmm1
|
|
movdqa (%rdi, %rcx), %xmm2
|
|
movdqa %xmm2, %xmm4
|
|
|
|
#ifndef USE_SSSE3
|
|
psrldq $11, %xmm3
|
|
pslldq $5, %xmm2
|
|
por %xmm3, %xmm2 /* merge into one 16byte value */
|
|
#else
|
|
palignr $11, %xmm3, %xmm2 /* merge into one 16byte value */
|
|
#endif
|
|
TOLOWER (%xmm1, %xmm2)
|
|
|
|
pcmpeqb %xmm1, %xmm0
|
|
pcmpeqb %xmm2, %xmm1
|
|
psubb %xmm0, %xmm1
|
|
pmovmskb %xmm1, %edx
|
|
sub $0xffff, %edx
|
|
jnz LABEL(exit)
|
|
|
|
#if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L
|
|
sub $16, %r11
|
|
jbe LABEL(strcmp_exitz)
|
|
#endif
|
|
|
|
add $16, %rcx
|
|
movdqa %xmm4, %xmm3
|
|
jmp LABEL(loop_ashr_11)
|
|
|
|
.p2align 4
|
|
LABEL(nibble_ashr_11):
|
|
pcmpeqb %xmm3, %xmm0 /* check nibble for null char */
|
|
pmovmskb %xmm0, %edx
|
|
test $0xf800, %edx
|
|
jnz LABEL(ashr_11_exittail)
|
|
|
|
#if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L
|
|
cmp $5, %r11
|
|
jbe LABEL(ashr_11_exittail)
|
|
#endif
|
|
|
|
pxor %xmm0, %xmm0
|
|
sub $0x1000, %r10
|
|
jmp LABEL(gobble_ashr_11)
|
|
|
|
.p2align 4
|
|
LABEL(ashr_11_exittail):
|
|
movdqa (%rsi, %rcx), %xmm1
|
|
psrldq $11, %xmm0
|
|
psrldq $11, %xmm3
|
|
jmp LABEL(aftertail)
|
|
|
|
/*
|
|
* 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):
|
|
pxor %xmm0, %xmm0
|
|
movdqa (%rdi), %xmm2
|
|
movdqa (%rsi), %xmm1
|
|
pcmpeqb %xmm1, %xmm0
|
|
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
|
|
|
|
pxor %xmm0, %xmm0
|
|
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 */
|
|
|
|
.p2align 4
|
|
LABEL(loop_ashr_12):
|
|
add $16, %r10
|
|
jg LABEL(nibble_ashr_12)
|
|
|
|
LABEL(gobble_ashr_12):
|
|
movdqa (%rsi, %rcx), %xmm1
|
|
movdqa (%rdi, %rcx), %xmm2
|
|
movdqa %xmm2, %xmm4
|
|
|
|
#ifndef USE_SSSE3
|
|
psrldq $12, %xmm3
|
|
pslldq $4, %xmm2
|
|
por %xmm3, %xmm2 /* merge into one 16byte value */
|
|
#else
|
|
palignr $12, %xmm3, %xmm2 /* merge into one 16byte value */
|
|
#endif
|
|
TOLOWER (%xmm1, %xmm2)
|
|
|
|
pcmpeqb %xmm1, %xmm0
|
|
pcmpeqb %xmm2, %xmm1
|
|
psubb %xmm0, %xmm1
|
|
pmovmskb %xmm1, %edx
|
|
sub $0xffff, %edx
|
|
jnz LABEL(exit)
|
|
|
|
#if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L
|
|
sub $16, %r11
|
|
jbe LABEL(strcmp_exitz)
|
|
#endif
|
|
|
|
add $16, %rcx
|
|
movdqa %xmm4, %xmm3
|
|
|
|
add $16, %r10
|
|
jg LABEL(nibble_ashr_12) /* cross page boundary */
|
|
|
|
movdqa (%rsi, %rcx), %xmm1
|
|
movdqa (%rdi, %rcx), %xmm2
|
|
movdqa %xmm2, %xmm4
|
|
|
|
#ifndef USE_SSSE3
|
|
psrldq $12, %xmm3
|
|
pslldq $4, %xmm2
|
|
por %xmm3, %xmm2 /* merge into one 16byte value */
|
|
#else
|
|
palignr $12, %xmm3, %xmm2 /* merge into one 16byte value */
|
|
#endif
|
|
TOLOWER (%xmm1, %xmm2)
|
|
|
|
pcmpeqb %xmm1, %xmm0
|
|
pcmpeqb %xmm2, %xmm1
|
|
psubb %xmm0, %xmm1
|
|
pmovmskb %xmm1, %edx
|
|
sub $0xffff, %edx
|
|
jnz LABEL(exit)
|
|
|
|
#if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L
|
|
sub $16, %r11
|
|
jbe LABEL(strcmp_exitz)
|
|
#endif
|
|
|
|
add $16, %rcx
|
|
movdqa %xmm4, %xmm3
|
|
jmp LABEL(loop_ashr_12)
|
|
|
|
.p2align 4
|
|
LABEL(nibble_ashr_12):
|
|
pcmpeqb %xmm3, %xmm0 /* check nibble for null char */
|
|
pmovmskb %xmm0, %edx
|
|
test $0xf000, %edx
|
|
jnz LABEL(ashr_12_exittail)
|
|
|
|
#if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L
|
|
cmp $4, %r11
|
|
jbe LABEL(ashr_12_exittail)
|
|
#endif
|
|
|
|
pxor %xmm0, %xmm0
|
|
sub $0x1000, %r10
|
|
jmp LABEL(gobble_ashr_12)
|
|
|
|
.p2align 4
|
|
LABEL(ashr_12_exittail):
|
|
movdqa (%rsi, %rcx), %xmm1
|
|
psrldq $12, %xmm0
|
|
psrldq $12, %xmm3
|
|
jmp LABEL(aftertail)
|
|
|
|
/*
|
|
* 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):
|
|
pxor %xmm0, %xmm0
|
|
movdqa (%rdi), %xmm2
|
|
movdqa (%rsi), %xmm1
|
|
pcmpeqb %xmm1, %xmm0
|
|
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
|
|
|
|
pxor %xmm0, %xmm0
|
|
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 */
|
|
|
|
.p2align 4
|
|
LABEL(loop_ashr_13):
|
|
add $16, %r10
|
|
jg LABEL(nibble_ashr_13)
|
|
|
|
LABEL(gobble_ashr_13):
|
|
movdqa (%rsi, %rcx), %xmm1
|
|
movdqa (%rdi, %rcx), %xmm2
|
|
movdqa %xmm2, %xmm4
|
|
|
|
#ifndef USE_SSSE3
|
|
psrldq $13, %xmm3
|
|
pslldq $3, %xmm2
|
|
por %xmm3, %xmm2 /* merge into one 16byte value */
|
|
#else
|
|
palignr $13, %xmm3, %xmm2 /* merge into one 16byte value */
|
|
#endif
|
|
TOLOWER (%xmm1, %xmm2)
|
|
|
|
pcmpeqb %xmm1, %xmm0
|
|
pcmpeqb %xmm2, %xmm1
|
|
psubb %xmm0, %xmm1
|
|
pmovmskb %xmm1, %edx
|
|
sub $0xffff, %edx
|
|
jnz LABEL(exit)
|
|
|
|
#if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L
|
|
sub $16, %r11
|
|
jbe LABEL(strcmp_exitz)
|
|
#endif
|
|
|
|
add $16, %rcx
|
|
movdqa %xmm4, %xmm3
|
|
|
|
add $16, %r10
|
|
jg LABEL(nibble_ashr_13) /* cross page boundary */
|
|
|
|
movdqa (%rsi, %rcx), %xmm1
|
|
movdqa (%rdi, %rcx), %xmm2
|
|
movdqa %xmm2, %xmm4
|
|
|
|
#ifndef USE_SSSE3
|
|
psrldq $13, %xmm3
|
|
pslldq $3, %xmm2
|
|
por %xmm3, %xmm2 /* merge into one 16byte value */
|
|
#else
|
|
palignr $13, %xmm3, %xmm2 /* merge into one 16byte value */
|
|
#endif
|
|
TOLOWER (%xmm1, %xmm2)
|
|
|
|
pcmpeqb %xmm1, %xmm0
|
|
pcmpeqb %xmm2, %xmm1
|
|
psubb %xmm0, %xmm1
|
|
pmovmskb %xmm1, %edx
|
|
sub $0xffff, %edx
|
|
jnz LABEL(exit)
|
|
|
|
#if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L
|
|
sub $16, %r11
|
|
jbe LABEL(strcmp_exitz)
|
|
#endif
|
|
|
|
add $16, %rcx
|
|
movdqa %xmm4, %xmm3
|
|
jmp LABEL(loop_ashr_13)
|
|
|
|
.p2align 4
|
|
LABEL(nibble_ashr_13):
|
|
pcmpeqb %xmm3, %xmm0 /* check nibble for null char */
|
|
pmovmskb %xmm0, %edx
|
|
test $0xe000, %edx
|
|
jnz LABEL(ashr_13_exittail)
|
|
|
|
#if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L
|
|
cmp $3, %r11
|
|
jbe LABEL(ashr_13_exittail)
|
|
#endif
|
|
|
|
pxor %xmm0, %xmm0
|
|
sub $0x1000, %r10
|
|
jmp LABEL(gobble_ashr_13)
|
|
|
|
.p2align 4
|
|
LABEL(ashr_13_exittail):
|
|
movdqa (%rsi, %rcx), %xmm1
|
|
psrldq $13, %xmm0
|
|
psrldq $13, %xmm3
|
|
jmp LABEL(aftertail)
|
|
|
|
/*
|
|
* 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):
|
|
pxor %xmm0, %xmm0
|
|
movdqa (%rdi), %xmm2
|
|
movdqa (%rsi), %xmm1
|
|
pcmpeqb %xmm1, %xmm0
|
|
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
|
|
|
|
pxor %xmm0, %xmm0
|
|
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 */
|
|
|
|
.p2align 4
|
|
LABEL(loop_ashr_14):
|
|
add $16, %r10
|
|
jg LABEL(nibble_ashr_14)
|
|
|
|
LABEL(gobble_ashr_14):
|
|
movdqa (%rsi, %rcx), %xmm1
|
|
movdqa (%rdi, %rcx), %xmm2
|
|
movdqa %xmm2, %xmm4
|
|
|
|
#ifndef USE_SSSE3
|
|
psrldq $14, %xmm3
|
|
pslldq $2, %xmm2
|
|
por %xmm3, %xmm2 /* merge into one 16byte value */
|
|
#else
|
|
palignr $14, %xmm3, %xmm2 /* merge into one 16byte value */
|
|
#endif
|
|
TOLOWER (%xmm1, %xmm2)
|
|
|
|
pcmpeqb %xmm1, %xmm0
|
|
pcmpeqb %xmm2, %xmm1
|
|
psubb %xmm0, %xmm1
|
|
pmovmskb %xmm1, %edx
|
|
sub $0xffff, %edx
|
|
jnz LABEL(exit)
|
|
|
|
#if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L
|
|
sub $16, %r11
|
|
jbe LABEL(strcmp_exitz)
|
|
#endif
|
|
|
|
add $16, %rcx
|
|
movdqa %xmm4, %xmm3
|
|
|
|
add $16, %r10
|
|
jg LABEL(nibble_ashr_14) /* cross page boundary */
|
|
|
|
movdqa (%rsi, %rcx), %xmm1
|
|
movdqa (%rdi, %rcx), %xmm2
|
|
movdqa %xmm2, %xmm4
|
|
|
|
#ifndef USE_SSSE3
|
|
psrldq $14, %xmm3
|
|
pslldq $2, %xmm2
|
|
por %xmm3, %xmm2 /* merge into one 16byte value */
|
|
#else
|
|
palignr $14, %xmm3, %xmm2 /* merge into one 16byte value */
|
|
#endif
|
|
TOLOWER (%xmm1, %xmm2)
|
|
|
|
pcmpeqb %xmm1, %xmm0
|
|
pcmpeqb %xmm2, %xmm1
|
|
psubb %xmm0, %xmm1
|
|
pmovmskb %xmm1, %edx
|
|
sub $0xffff, %edx
|
|
jnz LABEL(exit)
|
|
|
|
#if defined USE_AS_STRNCMP | defined USE_AS_STRNCASECMP_L
|
|
sub $16, %r11
|
|
jbe LABEL(strcmp_exitz)
|
|
#endif
|
|
|
|
add $16, %rcx
|
|
movdqa %xmm4, %xmm3
|
|
jmp LABEL(loop_ashr_14)
|
|
|
|
.p2align 4
|
|
LABEL(nibble_ashr_14):
|
|
pcmpeqb %xmm3, %xmm0 /* check nibble for null char */
|
|
pmovmskb %xmm0, %edx
|
|
test $0xc000, %edx
|
|
jnz LABEL(ashr_14_exittail)
|
|
|
|
#if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L
|
|
cmp $2, %r11
|
|
jbe LABEL(ashr_14_exittail)
|
|
#endif
|
|
|
|
pxor %xmm0, %xmm0
|
|
sub $0x1000, %r10
|
|
jmp LABEL(gobble_ashr_14)
|
|
|
|
.p2align 4
|
|
LABEL(ashr_14_exittail):
|
|
movdqa (%rsi, %rcx), %xmm1
|
|
psrldq $14, %xmm0
|
|
psrldq $14, %xmm3
|
|
jmp LABEL(aftertail)
|
|
|
|
/*
|
|
* 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):
|
|
pxor %xmm0, %xmm0
|
|
movdqa (%rdi), %xmm2
|
|
movdqa (%rsi), %xmm1
|
|
pcmpeqb %xmm1, %xmm0
|
|
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
|
|
|
|
pxor %xmm0, %xmm0
|
|
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 */
|
|
|
|
.p2align 4
|
|
LABEL(loop_ashr_15):
|
|
add $16, %r10
|
|
jg LABEL(nibble_ashr_15)
|
|
|
|
LABEL(gobble_ashr_15):
|
|
movdqa (%rsi, %rcx), %xmm1
|
|
movdqa (%rdi, %rcx), %xmm2
|
|
movdqa %xmm2, %xmm4
|
|
|
|
#ifndef USE_SSSE3
|
|
psrldq $15, %xmm3
|
|
pslldq $1, %xmm2
|
|
por %xmm3, %xmm2 /* merge into one 16byte value */
|
|
#else
|
|
palignr $15, %xmm3, %xmm2 /* merge into one 16byte value */
|
|
#endif
|
|
TOLOWER (%xmm1, %xmm2)
|
|
|
|
pcmpeqb %xmm1, %xmm0
|
|
pcmpeqb %xmm2, %xmm1
|
|
psubb %xmm0, %xmm1
|
|
pmovmskb %xmm1, %edx
|
|
sub $0xffff, %edx
|
|
jnz LABEL(exit)
|
|
|
|
#if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L
|
|
sub $16, %r11
|
|
jbe LABEL(strcmp_exitz)
|
|
#endif
|
|
|
|
add $16, %rcx
|
|
movdqa %xmm4, %xmm3
|
|
|
|
add $16, %r10
|
|
jg LABEL(nibble_ashr_15) /* cross page boundary */
|
|
|
|
movdqa (%rsi, %rcx), %xmm1
|
|
movdqa (%rdi, %rcx), %xmm2
|
|
movdqa %xmm2, %xmm4
|
|
|
|
#ifndef USE_SSSE3
|
|
psrldq $15, %xmm3
|
|
pslldq $1, %xmm2
|
|
por %xmm3, %xmm2 /* merge into one 16byte value */
|
|
#else
|
|
palignr $15, %xmm3, %xmm2 /* merge into one 16byte value */
|
|
#endif
|
|
TOLOWER (%xmm1, %xmm2)
|
|
|
|
pcmpeqb %xmm1, %xmm0
|
|
pcmpeqb %xmm2, %xmm1
|
|
psubb %xmm0, %xmm1
|
|
pmovmskb %xmm1, %edx
|
|
sub $0xffff, %edx
|
|
jnz LABEL(exit)
|
|
|
|
#if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L
|
|
sub $16, %r11
|
|
jbe LABEL(strcmp_exitz)
|
|
#endif
|
|
|
|
add $16, %rcx
|
|
movdqa %xmm4, %xmm3
|
|
jmp LABEL(loop_ashr_15)
|
|
|
|
.p2align 4
|
|
LABEL(nibble_ashr_15):
|
|
pcmpeqb %xmm3, %xmm0 /* check nibble for null char */
|
|
pmovmskb %xmm0, %edx
|
|
test $0x8000, %edx
|
|
jnz LABEL(ashr_15_exittail)
|
|
|
|
#if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L
|
|
cmpq $1, %r11
|
|
jbe LABEL(ashr_15_exittail)
|
|
#endif
|
|
|
|
pxor %xmm0, %xmm0
|
|
sub $0x1000, %r10
|
|
jmp LABEL(gobble_ashr_15)
|
|
|
|
.p2align 4
|
|
LABEL(ashr_15_exittail):
|
|
movdqa (%rsi, %rcx), %xmm1
|
|
psrldq $15, %xmm3
|
|
psrldq $15, %xmm0
|
|
|
|
.p2align 4
|
|
LABEL(aftertail):
|
|
TOLOWER (%xmm1, %xmm3)
|
|
pcmpeqb %xmm3, %xmm1
|
|
psubb %xmm0, %xmm1
|
|
pmovmskb %xmm1, %edx
|
|
not %edx
|
|
|
|
.p2align 4
|
|
LABEL(exit):
|
|
lea -16(%r9, %rcx), %rax /* locate the exact offset for rdi */
|
|
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
|
|
LABEL(Byte0):
|
|
movzx (%rsi), %ecx
|
|
movzx (%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
|
|
END (STRCMP)
|
|
|
|
.section .rodata,"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)
|
|
libc_hidden_builtin_def (STRCMP)
|