mirror of
https://sourceware.org/git/glibc.git
synced 2024-11-10 15:20:10 +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
363 lines
7.1 KiB
ArmAsm
363 lines
7.1 KiB
ArmAsm
/* memcmp with SSE2
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Copyright (C) 2009-2019 Free Software Foundation, Inc.
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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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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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.text
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ENTRY (memcmp)
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#ifdef __ILP32__
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/* Clear the upper 32 bits. */
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movl %edx, %edx
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#endif
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test %RDX_LP, %RDX_LP
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jz L(finz)
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cmpq $1, %rdx
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jbe L(finr1b)
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subq %rdi, %rsi
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movq %rdx, %r10
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cmpq $32, %r10
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jae L(gt32)
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/* Handle small chunks and last block of less than 32 bytes. */
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L(small):
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testq $1, %r10
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jz L(s2b)
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movzbl (%rdi), %eax
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movzbl (%rdi, %rsi), %edx
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subq $1, %r10
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je L(finz1)
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addq $1, %rdi
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subl %edx, %eax
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jnz L(exit)
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L(s2b):
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testq $2, %r10
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jz L(s4b)
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movzwl (%rdi), %eax
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movzwl (%rdi, %rsi), %edx
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subq $2, %r10
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je L(fin2_7)
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addq $2, %rdi
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cmpl %edx, %eax
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jnz L(fin2_7)
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L(s4b):
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testq $4, %r10
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jz L(s8b)
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movl (%rdi), %eax
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movl (%rdi, %rsi), %edx
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subq $4, %r10
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je L(fin2_7)
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addq $4, %rdi
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cmpl %edx, %eax
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jnz L(fin2_7)
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L(s8b):
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testq $8, %r10
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jz L(s16b)
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movq (%rdi), %rax
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movq (%rdi, %rsi), %rdx
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subq $8, %r10
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je L(fin2_7)
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addq $8, %rdi
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cmpq %rdx, %rax
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jnz L(fin2_7)
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L(s16b):
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movdqu (%rdi), %xmm1
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movdqu (%rdi, %rsi), %xmm0
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pcmpeqb %xmm0, %xmm1
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pmovmskb %xmm1, %edx
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xorl %eax, %eax
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subl $0xffff, %edx
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jz L(finz)
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bsfl %edx, %ecx
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leaq (%rdi, %rcx), %rcx
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movzbl (%rcx), %eax
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movzbl (%rsi, %rcx), %edx
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jmp L(finz1)
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.p2align 4,, 4
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L(finr1b):
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movzbl (%rdi), %eax
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movzbl (%rsi), %edx
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L(finz1):
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subl %edx, %eax
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L(exit):
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ret
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.p2align 4,, 4
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L(fin2_7):
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cmpq %rdx, %rax
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jz L(finz)
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movq %rax, %r11
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subq %rdx, %r11
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bsfq %r11, %rcx
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sarq $3, %rcx
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salq $3, %rcx
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sarq %cl, %rax
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movzbl %al, %eax
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sarq %cl, %rdx
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movzbl %dl, %edx
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subl %edx, %eax
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ret
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.p2align 4,, 4
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L(finz):
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xorl %eax, %eax
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ret
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/* For blocks bigger than 32 bytes
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1. Advance one of the addr pointer to be 16B aligned.
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2. Treat the case of both addr pointers aligned to 16B
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separately to avoid movdqu.
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3. Handle any blocks of greater than 64 consecutive bytes with
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unrolling to reduce branches.
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4. At least one addr pointer is 16B aligned, use memory version
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of pcmbeqb.
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*/
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.p2align 4,, 4
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L(gt32):
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movq %rdx, %r11
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addq %rdi, %r11
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movq %rdi, %r8
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andq $15, %r8
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jz L(16am)
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/* Both pointers may be misaligned. */
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movdqu (%rdi), %xmm1
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movdqu (%rdi, %rsi), %xmm0
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pcmpeqb %xmm0, %xmm1
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pmovmskb %xmm1, %edx
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subl $0xffff, %edx
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jnz L(neq)
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neg %r8
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leaq 16(%rdi, %r8), %rdi
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L(16am):
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/* Handle two 16B aligned pointers separately. */
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testq $15, %rsi
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jz L(ATR)
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testq $16, %rdi
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jz L(A32)
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movdqu (%rdi, %rsi), %xmm0
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pcmpeqb (%rdi), %xmm0
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pmovmskb %xmm0, %edx
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subl $0xffff, %edx
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jnz L(neq)
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addq $16, %rdi
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L(A32):
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movq %r11, %r10
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andq $-32, %r10
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cmpq %r10, %rdi
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jae L(mt16)
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/* Pre-unroll to be ready for unrolled 64B loop. */
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testq $32, %rdi
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jz L(A64)
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movdqu (%rdi,%rsi), %xmm0
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pcmpeqb (%rdi), %xmm0
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pmovmskb %xmm0, %edx
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subl $0xffff, %edx
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jnz L(neq)
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addq $16, %rdi
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movdqu (%rdi,%rsi), %xmm0
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pcmpeqb (%rdi), %xmm0
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pmovmskb %xmm0, %edx
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subl $0xffff, %edx
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jnz L(neq)
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addq $16, %rdi
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L(A64):
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movq %r11, %r10
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andq $-64, %r10
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cmpq %r10, %rdi
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jae L(mt32)
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L(A64main):
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movdqu (%rdi,%rsi), %xmm0
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pcmpeqb (%rdi), %xmm0
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pmovmskb %xmm0, %edx
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subl $0xffff, %edx
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jnz L(neq)
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addq $16, %rdi
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movdqu (%rdi,%rsi), %xmm0
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pcmpeqb (%rdi), %xmm0
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pmovmskb %xmm0, %edx
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subl $0xffff, %edx
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jnz L(neq)
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addq $16, %rdi
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movdqu (%rdi,%rsi), %xmm0
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pcmpeqb (%rdi), %xmm0
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pmovmskb %xmm0, %edx
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subl $0xffff, %edx
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jnz L(neq)
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addq $16, %rdi
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movdqu (%rdi,%rsi), %xmm0
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pcmpeqb (%rdi), %xmm0
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pmovmskb %xmm0, %edx
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subl $0xffff, %edx
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jnz L(neq)
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addq $16, %rdi
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cmpq %rdi, %r10
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jne L(A64main)
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L(mt32):
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movq %r11, %r10
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andq $-32, %r10
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cmpq %r10, %rdi
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jae L(mt16)
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L(A32main):
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movdqu (%rdi,%rsi), %xmm0
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pcmpeqb (%rdi), %xmm0
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pmovmskb %xmm0, %edx
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subl $0xffff, %edx
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jnz L(neq)
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addq $16, %rdi
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movdqu (%rdi,%rsi), %xmm0
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pcmpeqb (%rdi), %xmm0
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pmovmskb %xmm0, %edx
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subl $0xffff, %edx
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jnz L(neq)
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addq $16, %rdi
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cmpq %rdi, %r10
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jne L(A32main)
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L(mt16):
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subq %rdi, %r11
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je L(finz)
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movq %r11, %r10
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jmp L(small)
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.p2align 4,, 4
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L(neq):
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bsfl %edx, %ecx
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movzbl (%rdi, %rcx), %eax
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addq %rdi, %rsi
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movzbl (%rsi,%rcx), %edx
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jmp L(finz1)
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.p2align 4,, 4
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L(ATR):
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movq %r11, %r10
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andq $-32, %r10
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cmpq %r10, %rdi
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jae L(mt16)
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testq $16, %rdi
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jz L(ATR32)
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movdqa (%rdi,%rsi), %xmm0
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pcmpeqb (%rdi), %xmm0
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pmovmskb %xmm0, %edx
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subl $0xffff, %edx
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jnz L(neq)
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addq $16, %rdi
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cmpq %rdi, %r10
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je L(mt16)
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L(ATR32):
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movq %r11, %r10
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andq $-64, %r10
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testq $32, %rdi
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jz L(ATR64)
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movdqa (%rdi,%rsi), %xmm0
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pcmpeqb (%rdi), %xmm0
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pmovmskb %xmm0, %edx
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subl $0xffff, %edx
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jnz L(neq)
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addq $16, %rdi
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movdqa (%rdi,%rsi), %xmm0
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pcmpeqb (%rdi), %xmm0
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pmovmskb %xmm0, %edx
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subl $0xffff, %edx
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jnz L(neq)
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addq $16, %rdi
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L(ATR64):
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cmpq %rdi, %r10
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je L(mt32)
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L(ATR64main):
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movdqa (%rdi,%rsi), %xmm0
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pcmpeqb (%rdi), %xmm0
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pmovmskb %xmm0, %edx
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subl $0xffff, %edx
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jnz L(neq)
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addq $16, %rdi
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movdqa (%rdi,%rsi), %xmm0
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pcmpeqb (%rdi), %xmm0
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pmovmskb %xmm0, %edx
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subl $0xffff, %edx
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jnz L(neq)
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addq $16, %rdi
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movdqa (%rdi,%rsi), %xmm0
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pcmpeqb (%rdi), %xmm0
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pmovmskb %xmm0, %edx
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subl $0xffff, %edx
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jnz L(neq)
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addq $16, %rdi
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movdqa (%rdi,%rsi), %xmm0
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pcmpeqb (%rdi), %xmm0
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pmovmskb %xmm0, %edx
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subl $0xffff, %edx
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jnz L(neq)
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addq $16, %rdi
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cmpq %rdi, %r10
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jne L(ATR64main)
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movq %r11, %r10
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andq $-32, %r10
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cmpq %r10, %rdi
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jae L(mt16)
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L(ATR32res):
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movdqa (%rdi,%rsi), %xmm0
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pcmpeqb (%rdi), %xmm0
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pmovmskb %xmm0, %edx
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subl $0xffff, %edx
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jnz L(neq)
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addq $16, %rdi
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movdqa (%rdi,%rsi), %xmm0
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pcmpeqb (%rdi), %xmm0
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pmovmskb %xmm0, %edx
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subl $0xffff, %edx
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jnz L(neq)
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addq $16, %rdi
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cmpq %r10, %rdi
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jne L(ATR32res)
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subq %rdi, %r11
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je L(finz)
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movq %r11, %r10
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jmp L(small)
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/* Align to 16byte to improve instruction fetch. */
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.p2align 4,, 4
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END(memcmp)
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#undef bcmp
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weak_alias (memcmp, bcmp)
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libc_hidden_builtin_def (memcmp)
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