2010-08-25 17:07:37 +00:00
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/* strlen with SSE2
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2021-01-02 19:32:25 +00:00
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Copyright (C) 2010-2021 Free Software Foundation, Inc.
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2010-08-25 17:07:37 +00:00
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Contributed by Intel Corporation.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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2012-02-09 23:18:22 +00:00
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License along with the GNU C Library; if not, see
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Prefer https to http for gnu.org and fsf.org URLs
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
2019-09-07 05:40:42 +00:00
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<https://www.gnu.org/licenses/>. */
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2010-08-25 17:07:37 +00:00
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2011-10-23 19:17:23 +00:00
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/* for strlen only SHARED version is optimized, for strcat, strncat, strnlen both STATIC and SHARED are optimized */
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2014-11-24 09:33:45 +00:00
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#if (defined USE_AS_STRNLEN || defined USE_AS_STRCAT || defined SHARED) && IS_IN (libc)
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2011-10-23 19:17:23 +00:00
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2011-08-04 19:33:38 +00:00
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# ifndef USE_AS_STRCAT
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2010-08-25 17:07:37 +00:00
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2011-08-04 19:33:38 +00:00
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# include <sysdep.h>
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2011-10-23 19:17:23 +00:00
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# define PARMS 4
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# define STR PARMS
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# define RETURN ret
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# ifdef USE_AS_STRNLEN
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# define LEN PARMS + 8
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# define CFI_PUSH(REG) \
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2011-08-04 19:33:38 +00:00
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cfi_adjust_cfa_offset (4); \
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cfi_rel_offset (REG, 0)
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2010-08-25 17:07:37 +00:00
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2011-10-23 19:17:23 +00:00
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# define CFI_POP(REG) \
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2011-08-04 19:33:38 +00:00
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cfi_adjust_cfa_offset (-4); \
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cfi_restore (REG)
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2010-08-25 17:07:37 +00:00
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2011-10-23 19:17:23 +00:00
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# define PUSH(REG) pushl REG; CFI_PUSH (REG)
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# define POP(REG) popl REG; CFI_POP (REG)
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# undef RETURN
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# define RETURN POP (%edi); CFI_PUSH(%edi); ret
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# endif
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# ifndef STRLEN
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# define STRLEN __strlen_sse2
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# endif
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2010-08-25 17:07:37 +00:00
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2011-09-08 02:28:44 +00:00
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atom_text_section
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2011-10-23 19:17:23 +00:00
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ENTRY (STRLEN)
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2010-08-25 17:07:37 +00:00
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mov STR(%esp), %edx
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2011-10-23 19:17:23 +00:00
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# ifdef USE_AS_STRNLEN
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PUSH (%edi)
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movl LEN(%esp), %edi
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sub $4, %edi
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jbe L(len_less4_prolog)
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# endif
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2011-08-04 19:33:38 +00:00
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# endif
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2010-08-25 17:07:37 +00:00
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xor %eax, %eax
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cmpb $0, (%edx)
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jz L(exit_tail0)
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cmpb $0, 1(%edx)
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jz L(exit_tail1)
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cmpb $0, 2(%edx)
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jz L(exit_tail2)
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cmpb $0, 3(%edx)
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jz L(exit_tail3)
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2011-10-23 19:17:23 +00:00
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# ifdef USE_AS_STRNLEN
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sub $4, %edi
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jbe L(len_less8_prolog)
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# endif
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2010-08-25 17:07:37 +00:00
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cmpb $0, 4(%edx)
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jz L(exit_tail4)
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cmpb $0, 5(%edx)
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jz L(exit_tail5)
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cmpb $0, 6(%edx)
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jz L(exit_tail6)
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cmpb $0, 7(%edx)
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jz L(exit_tail7)
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2011-10-23 19:17:23 +00:00
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# ifdef USE_AS_STRNLEN
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sub $4, %edi
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jbe L(len_less12_prolog)
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# endif
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2010-08-25 17:07:37 +00:00
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cmpb $0, 8(%edx)
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jz L(exit_tail8)
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cmpb $0, 9(%edx)
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jz L(exit_tail9)
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cmpb $0, 10(%edx)
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jz L(exit_tail10)
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cmpb $0, 11(%edx)
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jz L(exit_tail11)
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2011-10-23 19:17:23 +00:00
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# ifdef USE_AS_STRNLEN
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sub $4, %edi
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jbe L(len_less16_prolog)
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# endif
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2010-08-25 17:07:37 +00:00
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cmpb $0, 12(%edx)
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jz L(exit_tail12)
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cmpb $0, 13(%edx)
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jz L(exit_tail13)
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cmpb $0, 14(%edx)
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jz L(exit_tail14)
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cmpb $0, 15(%edx)
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jz L(exit_tail15)
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2011-10-23 19:17:23 +00:00
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2010-08-25 17:07:37 +00:00
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pxor %xmm0, %xmm0
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2011-10-23 19:17:23 +00:00
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lea 16(%edx), %eax
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mov %eax, %ecx
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2010-08-25 17:07:37 +00:00
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and $-16, %eax
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2011-10-23 19:17:23 +00:00
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# ifdef USE_AS_STRNLEN
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and $15, %edx
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add %edx, %edi
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sub $64, %edi
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jbe L(len_less64)
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# endif
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2010-08-25 17:07:37 +00:00
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pcmpeqb (%eax), %xmm0
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pmovmskb %xmm0, %edx
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pxor %xmm1, %xmm1
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test %edx, %edx
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lea 16(%eax), %eax
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jnz L(exit)
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pcmpeqb (%eax), %xmm1
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pmovmskb %xmm1, %edx
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pxor %xmm2, %xmm2
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test %edx, %edx
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lea 16(%eax), %eax
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jnz L(exit)
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pcmpeqb (%eax), %xmm2
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pmovmskb %xmm2, %edx
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pxor %xmm3, %xmm3
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test %edx, %edx
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lea 16(%eax), %eax
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jnz L(exit)
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pcmpeqb (%eax), %xmm3
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pmovmskb %xmm3, %edx
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test %edx, %edx
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lea 16(%eax), %eax
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jnz L(exit)
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2011-10-23 19:17:23 +00:00
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# ifdef USE_AS_STRNLEN
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sub $64, %edi
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jbe L(len_less64)
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# endif
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2010-08-25 17:07:37 +00:00
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pcmpeqb (%eax), %xmm0
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pmovmskb %xmm0, %edx
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test %edx, %edx
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lea 16(%eax), %eax
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jnz L(exit)
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pcmpeqb (%eax), %xmm1
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pmovmskb %xmm1, %edx
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test %edx, %edx
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lea 16(%eax), %eax
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jnz L(exit)
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pcmpeqb (%eax), %xmm2
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pmovmskb %xmm2, %edx
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test %edx, %edx
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lea 16(%eax), %eax
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jnz L(exit)
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pcmpeqb (%eax), %xmm3
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pmovmskb %xmm3, %edx
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test %edx, %edx
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lea 16(%eax), %eax
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jnz L(exit)
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2011-10-23 19:17:23 +00:00
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# ifdef USE_AS_STRNLEN
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sub $64, %edi
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jbe L(len_less64)
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# endif
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2010-08-25 17:07:37 +00:00
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pcmpeqb (%eax), %xmm0
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pmovmskb %xmm0, %edx
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test %edx, %edx
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lea 16(%eax), %eax
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jnz L(exit)
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pcmpeqb (%eax), %xmm1
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pmovmskb %xmm1, %edx
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test %edx, %edx
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lea 16(%eax), %eax
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jnz L(exit)
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pcmpeqb (%eax), %xmm2
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pmovmskb %xmm2, %edx
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test %edx, %edx
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lea 16(%eax), %eax
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jnz L(exit)
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pcmpeqb (%eax), %xmm3
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pmovmskb %xmm3, %edx
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test %edx, %edx
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lea 16(%eax), %eax
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jnz L(exit)
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2011-10-23 19:17:23 +00:00
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# ifdef USE_AS_STRNLEN
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sub $64, %edi
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jbe L(len_less64)
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# endif
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2010-08-25 17:07:37 +00:00
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pcmpeqb (%eax), %xmm0
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pmovmskb %xmm0, %edx
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test %edx, %edx
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lea 16(%eax), %eax
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jnz L(exit)
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pcmpeqb (%eax), %xmm1
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pmovmskb %xmm1, %edx
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test %edx, %edx
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lea 16(%eax), %eax
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jnz L(exit)
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pcmpeqb (%eax), %xmm2
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pmovmskb %xmm2, %edx
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test %edx, %edx
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lea 16(%eax), %eax
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jnz L(exit)
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pcmpeqb (%eax), %xmm3
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pmovmskb %xmm3, %edx
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test %edx, %edx
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lea 16(%eax), %eax
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jnz L(exit)
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2011-10-23 19:17:23 +00:00
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# ifdef USE_AS_STRNLEN
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mov %eax, %edx
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and $63, %edx
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add %edx, %edi
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# endif
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2010-08-25 17:07:37 +00:00
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and $-0x40, %eax
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2011-10-23 19:17:23 +00:00
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.p2align 4
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L(aligned_64_loop):
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# ifdef USE_AS_STRNLEN
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sub $64, %edi
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jbe L(len_less64)
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# endif
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2011-08-04 19:33:38 +00:00
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movaps (%eax), %xmm0
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movaps 16(%eax), %xmm1
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movaps 32(%eax), %xmm2
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movaps 48(%eax), %xmm6
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pminub %xmm1, %xmm0
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pminub %xmm6, %xmm2
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pminub %xmm0, %xmm2
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pcmpeqb %xmm3, %xmm2
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pmovmskb %xmm2, %edx
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test %edx, %edx
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2010-08-25 17:07:37 +00:00
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lea 64(%eax), %eax
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2011-10-23 19:17:23 +00:00
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jz L(aligned_64_loop)
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2011-08-04 19:33:38 +00:00
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pcmpeqb -64(%eax), %xmm3
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pmovmskb %xmm3, %edx
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test %edx, %edx
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lea 48(%ecx), %ecx
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jnz L(exit)
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pcmpeqb %xmm1, %xmm3
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pmovmskb %xmm3, %edx
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2010-08-25 17:07:37 +00:00
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test %edx, %edx
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2011-08-04 19:33:38 +00:00
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lea -16(%ecx), %ecx
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jnz L(exit)
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pcmpeqb -32(%eax), %xmm3
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pmovmskb %xmm3, %edx
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test %edx, %edx
|
|
|
|
|
lea -16(%ecx), %ecx
|
|
|
|
|
jnz L(exit)
|
|
|
|
|
|
|
|
|
|
pcmpeqb %xmm6, %xmm3
|
|
|
|
|
pmovmskb %xmm3, %edx
|
|
|
|
|
lea -16(%ecx), %ecx
|
2010-08-25 17:07:37 +00:00
|
|
|
L(exit):
|
|
|
|
|
sub %ecx, %eax
|
|
|
|
|
test %dl, %dl
|
|
|
|
|
jz L(exit_high)
|
2011-10-23 19:17:23 +00:00
|
|
|
|
|
|
|
|
mov %dl, %cl
|
|
|
|
|
and $15, %cl
|
|
|
|
|
jz L(exit_8)
|
2010-08-25 17:07:37 +00:00
|
|
|
test $0x01, %dl
|
|
|
|
|
jnz L(exit_tail0)
|
|
|
|
|
test $0x02, %dl
|
|
|
|
|
jnz L(exit_tail1)
|
|
|
|
|
test $0x04, %dl
|
|
|
|
|
jnz L(exit_tail2)
|
2011-10-23 19:17:23 +00:00
|
|
|
add $3, %eax
|
|
|
|
|
RETURN
|
2010-08-25 17:07:37 +00:00
|
|
|
|
2011-10-23 19:17:23 +00:00
|
|
|
.p2align 4
|
|
|
|
|
L(exit_8):
|
2010-08-25 17:07:37 +00:00
|
|
|
test $0x10, %dl
|
|
|
|
|
jnz L(exit_tail4)
|
|
|
|
|
test $0x20, %dl
|
|
|
|
|
jnz L(exit_tail5)
|
|
|
|
|
test $0x40, %dl
|
|
|
|
|
jnz L(exit_tail6)
|
|
|
|
|
add $7, %eax
|
|
|
|
|
RETURN
|
|
|
|
|
|
2011-10-23 19:17:23 +00:00
|
|
|
.p2align 4
|
2010-08-25 17:07:37 +00:00
|
|
|
L(exit_high):
|
2011-10-23 19:17:23 +00:00
|
|
|
mov %dh, %ch
|
|
|
|
|
and $15, %ch
|
|
|
|
|
jz L(exit_high_8)
|
2010-08-25 17:07:37 +00:00
|
|
|
test $0x01, %dh
|
2011-10-23 19:17:23 +00:00
|
|
|
jnz L(exit_tail8)
|
|
|
|
|
test $0x02, %dh
|
|
|
|
|
jnz L(exit_tail9)
|
|
|
|
|
test $0x04, %dh
|
|
|
|
|
jnz L(exit_tail10)
|
|
|
|
|
add $11, %eax
|
|
|
|
|
RETURN
|
|
|
|
|
|
|
|
|
|
.p2align 4
|
|
|
|
|
L(exit_high_8):
|
|
|
|
|
test $0x10, %dh
|
|
|
|
|
jnz L(exit_tail12)
|
|
|
|
|
test $0x20, %dh
|
|
|
|
|
jnz L(exit_tail13)
|
|
|
|
|
test $0x40, %dh
|
|
|
|
|
jnz L(exit_tail14)
|
|
|
|
|
add $15, %eax
|
|
|
|
|
L(exit_tail0):
|
|
|
|
|
RETURN
|
|
|
|
|
|
|
|
|
|
# ifdef USE_AS_STRNLEN
|
|
|
|
|
|
|
|
|
|
.p2align 4
|
|
|
|
|
L(len_less64):
|
|
|
|
|
pxor %xmm0, %xmm0
|
|
|
|
|
add $64, %edi
|
|
|
|
|
|
|
|
|
|
pcmpeqb (%eax), %xmm0
|
|
|
|
|
pmovmskb %xmm0, %edx
|
|
|
|
|
pxor %xmm1, %xmm1
|
|
|
|
|
lea 16(%eax), %eax
|
|
|
|
|
test %edx, %edx
|
|
|
|
|
jnz L(strnlen_exit)
|
|
|
|
|
|
|
|
|
|
sub $16, %edi
|
|
|
|
|
jbe L(return_start_len)
|
|
|
|
|
|
|
|
|
|
pcmpeqb (%eax), %xmm1
|
|
|
|
|
pmovmskb %xmm1, %edx
|
|
|
|
|
lea 16(%eax), %eax
|
|
|
|
|
test %edx, %edx
|
|
|
|
|
jnz L(strnlen_exit)
|
|
|
|
|
|
|
|
|
|
sub $16, %edi
|
|
|
|
|
jbe L(return_start_len)
|
|
|
|
|
|
|
|
|
|
pcmpeqb (%eax), %xmm0
|
|
|
|
|
pmovmskb %xmm0, %edx
|
|
|
|
|
lea 16(%eax), %eax
|
|
|
|
|
test %edx, %edx
|
|
|
|
|
jnz L(strnlen_exit)
|
|
|
|
|
|
|
|
|
|
sub $16, %edi
|
|
|
|
|
jbe L(return_start_len)
|
|
|
|
|
|
|
|
|
|
pcmpeqb (%eax), %xmm1
|
|
|
|
|
pmovmskb %xmm1, %edx
|
|
|
|
|
lea 16(%eax), %eax
|
|
|
|
|
test %edx, %edx
|
|
|
|
|
jnz L(strnlen_exit)
|
|
|
|
|
|
|
|
|
|
movl LEN(%esp), %eax
|
|
|
|
|
RETURN
|
|
|
|
|
|
|
|
|
|
.p2align 4
|
|
|
|
|
L(strnlen_exit):
|
|
|
|
|
sub %ecx, %eax
|
|
|
|
|
|
|
|
|
|
test %dl, %dl
|
|
|
|
|
jz L(strnlen_exit_high)
|
|
|
|
|
mov %dl, %cl
|
|
|
|
|
and $15, %cl
|
|
|
|
|
jz L(strnlen_exit_8)
|
|
|
|
|
test $0x01, %dl
|
2010-08-25 17:07:37 +00:00
|
|
|
jnz L(exit_tail0)
|
2011-10-23 19:17:23 +00:00
|
|
|
test $0x02, %dl
|
|
|
|
|
jnz L(strnlen_exit_tail1)
|
|
|
|
|
test $0x04, %dl
|
|
|
|
|
jnz L(strnlen_exit_tail2)
|
|
|
|
|
sub $4, %edi
|
|
|
|
|
jb L(return_start_len)
|
|
|
|
|
lea 3(%eax), %eax
|
|
|
|
|
RETURN
|
2010-08-25 17:07:37 +00:00
|
|
|
|
2011-10-23 19:17:23 +00:00
|
|
|
.p2align 4
|
|
|
|
|
L(strnlen_exit_8):
|
|
|
|
|
test $0x10, %dl
|
|
|
|
|
jnz L(strnlen_exit_tail4)
|
|
|
|
|
test $0x20, %dl
|
|
|
|
|
jnz L(strnlen_exit_tail5)
|
|
|
|
|
test $0x40, %dl
|
|
|
|
|
jnz L(strnlen_exit_tail6)
|
|
|
|
|
sub $8, %edi
|
|
|
|
|
jb L(return_start_len)
|
|
|
|
|
lea 7(%eax), %eax
|
|
|
|
|
RETURN
|
2010-08-25 17:07:37 +00:00
|
|
|
|
2011-10-23 19:17:23 +00:00
|
|
|
.p2align 4
|
|
|
|
|
L(strnlen_exit_high):
|
|
|
|
|
mov %dh, %ch
|
|
|
|
|
and $15, %ch
|
|
|
|
|
jz L(strnlen_exit_high_8)
|
|
|
|
|
test $0x01, %dh
|
|
|
|
|
jnz L(strnlen_exit_tail8)
|
|
|
|
|
test $0x02, %dh
|
|
|
|
|
jnz L(strnlen_exit_tail9)
|
2010-08-25 17:07:37 +00:00
|
|
|
test $0x04, %dh
|
2011-10-23 19:17:23 +00:00
|
|
|
jnz L(strnlen_exit_tail10)
|
|
|
|
|
sub $12, %edi
|
|
|
|
|
jb L(return_start_len)
|
|
|
|
|
lea 11(%eax), %eax
|
|
|
|
|
RETURN
|
2010-08-25 17:07:37 +00:00
|
|
|
|
2011-10-23 19:17:23 +00:00
|
|
|
.p2align 4
|
|
|
|
|
L(strnlen_exit_high_8):
|
2010-08-25 17:07:37 +00:00
|
|
|
test $0x10, %dh
|
2011-10-23 19:17:23 +00:00
|
|
|
jnz L(strnlen_exit_tail12)
|
2010-08-25 17:07:37 +00:00
|
|
|
test $0x20, %dh
|
2011-10-23 19:17:23 +00:00
|
|
|
jnz L(strnlen_exit_tail13)
|
2010-08-25 17:07:37 +00:00
|
|
|
test $0x40, %dh
|
2011-10-23 19:17:23 +00:00
|
|
|
jnz L(strnlen_exit_tail14)
|
|
|
|
|
sub $16, %edi
|
|
|
|
|
jb L(return_start_len)
|
|
|
|
|
lea 15(%eax), %eax
|
|
|
|
|
RETURN
|
|
|
|
|
|
|
|
|
|
.p2align 4
|
|
|
|
|
L(strnlen_exit_tail1):
|
|
|
|
|
sub $2, %edi
|
|
|
|
|
jb L(return_start_len)
|
|
|
|
|
lea 1(%eax), %eax
|
|
|
|
|
RETURN
|
|
|
|
|
|
|
|
|
|
.p2align 4
|
|
|
|
|
L(strnlen_exit_tail2):
|
|
|
|
|
sub $3, %edi
|
|
|
|
|
jb L(return_start_len)
|
|
|
|
|
lea 2(%eax), %eax
|
|
|
|
|
RETURN
|
|
|
|
|
|
|
|
|
|
.p2align 4
|
|
|
|
|
L(strnlen_exit_tail4):
|
|
|
|
|
sub $5, %edi
|
|
|
|
|
jb L(return_start_len)
|
|
|
|
|
lea 4(%eax), %eax
|
|
|
|
|
RETURN
|
|
|
|
|
|
|
|
|
|
.p2align 4
|
|
|
|
|
L(strnlen_exit_tail5):
|
|
|
|
|
sub $6, %edi
|
|
|
|
|
jb L(return_start_len)
|
|
|
|
|
lea 5(%eax), %eax
|
|
|
|
|
RETURN
|
|
|
|
|
|
|
|
|
|
.p2align 4
|
|
|
|
|
L(strnlen_exit_tail6):
|
|
|
|
|
sub $7, %edi
|
|
|
|
|
jb L(return_start_len)
|
|
|
|
|
lea 6(%eax), %eax
|
|
|
|
|
RETURN
|
|
|
|
|
|
|
|
|
|
.p2align 4
|
|
|
|
|
L(strnlen_exit_tail8):
|
|
|
|
|
sub $9, %edi
|
|
|
|
|
jb L(return_start_len)
|
|
|
|
|
lea 8(%eax), %eax
|
|
|
|
|
RETURN
|
|
|
|
|
|
|
|
|
|
.p2align 4
|
|
|
|
|
L(strnlen_exit_tail9):
|
|
|
|
|
sub $10, %edi
|
|
|
|
|
jb L(return_start_len)
|
|
|
|
|
lea 9(%eax), %eax
|
|
|
|
|
RETURN
|
|
|
|
|
|
|
|
|
|
.p2align 4
|
|
|
|
|
L(strnlen_exit_tail10):
|
|
|
|
|
sub $11, %edi
|
|
|
|
|
jb L(return_start_len)
|
|
|
|
|
lea 10(%eax), %eax
|
|
|
|
|
RETURN
|
|
|
|
|
|
|
|
|
|
.p2align 4
|
|
|
|
|
L(strnlen_exit_tail12):
|
|
|
|
|
sub $13, %edi
|
|
|
|
|
jb L(return_start_len)
|
|
|
|
|
lea 12(%eax), %eax
|
|
|
|
|
RETURN
|
|
|
|
|
|
|
|
|
|
.p2align 4
|
|
|
|
|
L(strnlen_exit_tail13):
|
|
|
|
|
sub $14, %edi
|
|
|
|
|
jb L(return_start_len)
|
|
|
|
|
lea 13(%eax), %eax
|
2010-08-25 17:07:37 +00:00
|
|
|
RETURN
|
|
|
|
|
|
2011-10-23 19:17:23 +00:00
|
|
|
.p2align 4
|
|
|
|
|
L(strnlen_exit_tail14):
|
|
|
|
|
sub $15, %edi
|
|
|
|
|
jb L(return_start_len)
|
|
|
|
|
lea 14(%eax), %eax
|
|
|
|
|
RETURN
|
|
|
|
|
|
|
|
|
|
.p2align 4
|
|
|
|
|
L(return_start_len):
|
|
|
|
|
movl LEN(%esp), %eax
|
|
|
|
|
RETURN
|
|
|
|
|
|
|
|
|
|
/* for prolog only */
|
|
|
|
|
|
|
|
|
|
.p2align 4
|
|
|
|
|
L(len_less4_prolog):
|
|
|
|
|
xor %eax, %eax
|
|
|
|
|
|
|
|
|
|
add $4, %edi
|
|
|
|
|
jz L(exit_tail0)
|
|
|
|
|
|
|
|
|
|
cmpb $0, (%edx)
|
|
|
|
|
jz L(exit_tail0)
|
|
|
|
|
cmp $1, %edi
|
|
|
|
|
je L(exit_tail1)
|
|
|
|
|
|
|
|
|
|
cmpb $0, 1(%edx)
|
|
|
|
|
jz L(exit_tail1)
|
|
|
|
|
cmp $2, %edi
|
|
|
|
|
je L(exit_tail2)
|
|
|
|
|
|
|
|
|
|
cmpb $0, 2(%edx)
|
|
|
|
|
jz L(exit_tail2)
|
|
|
|
|
cmp $3, %edi
|
|
|
|
|
je L(exit_tail3)
|
|
|
|
|
|
|
|
|
|
cmpb $0, 3(%edx)
|
|
|
|
|
jz L(exit_tail3)
|
|
|
|
|
mov $4, %eax
|
|
|
|
|
RETURN
|
|
|
|
|
|
|
|
|
|
.p2align 4
|
|
|
|
|
L(len_less8_prolog):
|
|
|
|
|
add $4, %edi
|
|
|
|
|
|
|
|
|
|
cmpb $0, 4(%edx)
|
|
|
|
|
jz L(exit_tail4)
|
|
|
|
|
cmp $1, %edi
|
|
|
|
|
je L(exit_tail5)
|
|
|
|
|
|
|
|
|
|
cmpb $0, 5(%edx)
|
|
|
|
|
jz L(exit_tail5)
|
|
|
|
|
cmp $2, %edi
|
|
|
|
|
je L(exit_tail6)
|
|
|
|
|
|
|
|
|
|
cmpb $0, 6(%edx)
|
|
|
|
|
jz L(exit_tail6)
|
|
|
|
|
cmp $3, %edi
|
|
|
|
|
je L(exit_tail7)
|
|
|
|
|
|
|
|
|
|
cmpb $0, 7(%edx)
|
|
|
|
|
jz L(exit_tail7)
|
|
|
|
|
mov $8, %eax
|
|
|
|
|
RETURN
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
.p2align 4
|
|
|
|
|
L(len_less12_prolog):
|
|
|
|
|
add $4, %edi
|
|
|
|
|
|
|
|
|
|
cmpb $0, 8(%edx)
|
|
|
|
|
jz L(exit_tail8)
|
|
|
|
|
cmp $1, %edi
|
|
|
|
|
je L(exit_tail9)
|
|
|
|
|
|
|
|
|
|
cmpb $0, 9(%edx)
|
|
|
|
|
jz L(exit_tail9)
|
|
|
|
|
cmp $2, %edi
|
|
|
|
|
je L(exit_tail10)
|
|
|
|
|
|
|
|
|
|
cmpb $0, 10(%edx)
|
|
|
|
|
jz L(exit_tail10)
|
|
|
|
|
cmp $3, %edi
|
|
|
|
|
je L(exit_tail11)
|
|
|
|
|
|
|
|
|
|
cmpb $0, 11(%edx)
|
|
|
|
|
jz L(exit_tail11)
|
|
|
|
|
mov $12, %eax
|
|
|
|
|
RETURN
|
|
|
|
|
|
|
|
|
|
.p2align 4
|
|
|
|
|
L(len_less16_prolog):
|
|
|
|
|
add $4, %edi
|
|
|
|
|
|
|
|
|
|
cmpb $0, 12(%edx)
|
|
|
|
|
jz L(exit_tail12)
|
|
|
|
|
cmp $1, %edi
|
|
|
|
|
je L(exit_tail13)
|
|
|
|
|
|
|
|
|
|
cmpb $0, 13(%edx)
|
|
|
|
|
jz L(exit_tail13)
|
|
|
|
|
cmp $2, %edi
|
|
|
|
|
je L(exit_tail14)
|
|
|
|
|
|
|
|
|
|
cmpb $0, 14(%edx)
|
|
|
|
|
jz L(exit_tail14)
|
|
|
|
|
cmp $3, %edi
|
|
|
|
|
je L(exit_tail15)
|
|
|
|
|
|
|
|
|
|
cmpb $0, 15(%edx)
|
|
|
|
|
jz L(exit_tail15)
|
|
|
|
|
mov $16, %eax
|
|
|
|
|
RETURN
|
|
|
|
|
# endif
|
|
|
|
|
|
2010-08-25 17:07:37 +00:00
|
|
|
.p2align 4
|
|
|
|
|
L(exit_tail1):
|
|
|
|
|
add $1, %eax
|
|
|
|
|
RETURN
|
|
|
|
|
|
|
|
|
|
L(exit_tail2):
|
|
|
|
|
add $2, %eax
|
|
|
|
|
RETURN
|
|
|
|
|
|
|
|
|
|
L(exit_tail3):
|
|
|
|
|
add $3, %eax
|
|
|
|
|
RETURN
|
|
|
|
|
|
|
|
|
|
L(exit_tail4):
|
|
|
|
|
add $4, %eax
|
|
|
|
|
RETURN
|
|
|
|
|
|
|
|
|
|
L(exit_tail5):
|
|
|
|
|
add $5, %eax
|
|
|
|
|
RETURN
|
|
|
|
|
|
|
|
|
|
L(exit_tail6):
|
|
|
|
|
add $6, %eax
|
|
|
|
|
RETURN
|
|
|
|
|
|
|
|
|
|
L(exit_tail7):
|
|
|
|
|
add $7, %eax
|
|
|
|
|
RETURN
|
|
|
|
|
|
|
|
|
|
L(exit_tail8):
|
|
|
|
|
add $8, %eax
|
|
|
|
|
RETURN
|
|
|
|
|
|
|
|
|
|
L(exit_tail9):
|
|
|
|
|
add $9, %eax
|
|
|
|
|
RETURN
|
|
|
|
|
|
|
|
|
|
L(exit_tail10):
|
|
|
|
|
add $10, %eax
|
|
|
|
|
RETURN
|
|
|
|
|
|
|
|
|
|
L(exit_tail11):
|
|
|
|
|
add $11, %eax
|
|
|
|
|
RETURN
|
|
|
|
|
|
|
|
|
|
L(exit_tail12):
|
|
|
|
|
add $12, %eax
|
|
|
|
|
RETURN
|
|
|
|
|
|
|
|
|
|
L(exit_tail13):
|
|
|
|
|
add $13, %eax
|
|
|
|
|
RETURN
|
|
|
|
|
|
|
|
|
|
L(exit_tail14):
|
|
|
|
|
add $14, %eax
|
|
|
|
|
RETURN
|
|
|
|
|
|
|
|
|
|
L(exit_tail15):
|
|
|
|
|
add $15, %eax
|
2011-08-04 19:33:38 +00:00
|
|
|
# ifndef USE_AS_STRCAT
|
2011-10-23 19:17:23 +00:00
|
|
|
RETURN
|
|
|
|
|
END (STRLEN)
|
2011-08-04 19:33:38 +00:00
|
|
|
# endif
|
2010-08-25 17:07:37 +00:00
|
|
|
#endif
|
