mirror of
https://sourceware.org/git/glibc.git
synced 2024-12-12 06:10:10 +00:00
2b778ceb40
I used these shell commands: ../glibc/scripts/update-copyrights $PWD/../gnulib/build-aux/update-copyright (cd ../glibc && git commit -am"[this commit message]") and then ignored the output, which consisted lines saying "FOO: warning: copyright statement not found" for each of 6694 files FOO. I then removed trailing white space from benchtests/bench-pthread-locks.c and iconvdata/tst-iconv-big5-hkscs-to-2ucs4.c, to work around this diagnostic from Savannah: remote: *** pre-commit check failed ... remote: *** error: lines with trailing whitespace found remote: error: hook declined to update refs/heads/master
363 lines
7.1 KiB
ArmAsm
363 lines
7.1 KiB
ArmAsm
/* memcmp with SSE2
|
|
Copyright (C) 2009-2021 Free Software Foundation, Inc.
|
|
Contributed by Intel Corporation.
|
|
This file is part of the GNU C Library.
|
|
|
|
The GNU C Library is free software; you can redistribute it and/or
|
|
modify it under the terms of the GNU Lesser General Public
|
|
License as published by the Free Software Foundation; either
|
|
version 2.1 of the License, or (at your option) any later version.
|
|
|
|
The GNU C Library is distributed in the hope that it will be useful,
|
|
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
Lesser General Public License for more details.
|
|
|
|
You should have received a copy of the GNU Lesser General Public
|
|
License along with the GNU C Library; if not, see
|
|
<https://www.gnu.org/licenses/>. */
|
|
|
|
#include <sysdep.h>
|
|
|
|
.text
|
|
ENTRY (memcmp)
|
|
#ifdef __ILP32__
|
|
/* Clear the upper 32 bits. */
|
|
movl %edx, %edx
|
|
#endif
|
|
test %RDX_LP, %RDX_LP
|
|
jz L(finz)
|
|
cmpq $1, %rdx
|
|
jbe L(finr1b)
|
|
subq %rdi, %rsi
|
|
movq %rdx, %r10
|
|
cmpq $32, %r10
|
|
jae L(gt32)
|
|
/* Handle small chunks and last block of less than 32 bytes. */
|
|
L(small):
|
|
testq $1, %r10
|
|
jz L(s2b)
|
|
movzbl (%rdi), %eax
|
|
movzbl (%rdi, %rsi), %edx
|
|
subq $1, %r10
|
|
je L(finz1)
|
|
addq $1, %rdi
|
|
subl %edx, %eax
|
|
jnz L(exit)
|
|
L(s2b):
|
|
testq $2, %r10
|
|
jz L(s4b)
|
|
movzwl (%rdi), %eax
|
|
movzwl (%rdi, %rsi), %edx
|
|
subq $2, %r10
|
|
je L(fin2_7)
|
|
addq $2, %rdi
|
|
cmpl %edx, %eax
|
|
jnz L(fin2_7)
|
|
L(s4b):
|
|
testq $4, %r10
|
|
jz L(s8b)
|
|
movl (%rdi), %eax
|
|
movl (%rdi, %rsi), %edx
|
|
subq $4, %r10
|
|
je L(fin2_7)
|
|
addq $4, %rdi
|
|
cmpl %edx, %eax
|
|
jnz L(fin2_7)
|
|
L(s8b):
|
|
testq $8, %r10
|
|
jz L(s16b)
|
|
movq (%rdi), %rax
|
|
movq (%rdi, %rsi), %rdx
|
|
subq $8, %r10
|
|
je L(fin2_7)
|
|
addq $8, %rdi
|
|
cmpq %rdx, %rax
|
|
jnz L(fin2_7)
|
|
L(s16b):
|
|
movdqu (%rdi), %xmm1
|
|
movdqu (%rdi, %rsi), %xmm0
|
|
pcmpeqb %xmm0, %xmm1
|
|
pmovmskb %xmm1, %edx
|
|
xorl %eax, %eax
|
|
subl $0xffff, %edx
|
|
jz L(finz)
|
|
bsfl %edx, %ecx
|
|
leaq (%rdi, %rcx), %rcx
|
|
movzbl (%rcx), %eax
|
|
movzbl (%rsi, %rcx), %edx
|
|
jmp L(finz1)
|
|
|
|
.p2align 4,, 4
|
|
L(finr1b):
|
|
movzbl (%rdi), %eax
|
|
movzbl (%rsi), %edx
|
|
L(finz1):
|
|
subl %edx, %eax
|
|
L(exit):
|
|
ret
|
|
|
|
.p2align 4,, 4
|
|
L(fin2_7):
|
|
cmpq %rdx, %rax
|
|
jz L(finz)
|
|
movq %rax, %r11
|
|
subq %rdx, %r11
|
|
bsfq %r11, %rcx
|
|
sarq $3, %rcx
|
|
salq $3, %rcx
|
|
sarq %cl, %rax
|
|
movzbl %al, %eax
|
|
sarq %cl, %rdx
|
|
movzbl %dl, %edx
|
|
subl %edx, %eax
|
|
ret
|
|
|
|
.p2align 4,, 4
|
|
L(finz):
|
|
xorl %eax, %eax
|
|
ret
|
|
|
|
/* For blocks bigger than 32 bytes
|
|
1. Advance one of the addr pointer to be 16B aligned.
|
|
2. Treat the case of both addr pointers aligned to 16B
|
|
separately to avoid movdqu.
|
|
3. Handle any blocks of greater than 64 consecutive bytes with
|
|
unrolling to reduce branches.
|
|
4. At least one addr pointer is 16B aligned, use memory version
|
|
of pcmbeqb.
|
|
*/
|
|
.p2align 4,, 4
|
|
L(gt32):
|
|
movq %rdx, %r11
|
|
addq %rdi, %r11
|
|
movq %rdi, %r8
|
|
|
|
andq $15, %r8
|
|
jz L(16am)
|
|
/* Both pointers may be misaligned. */
|
|
movdqu (%rdi), %xmm1
|
|
movdqu (%rdi, %rsi), %xmm0
|
|
pcmpeqb %xmm0, %xmm1
|
|
pmovmskb %xmm1, %edx
|
|
subl $0xffff, %edx
|
|
jnz L(neq)
|
|
neg %r8
|
|
leaq 16(%rdi, %r8), %rdi
|
|
L(16am):
|
|
/* Handle two 16B aligned pointers separately. */
|
|
testq $15, %rsi
|
|
jz L(ATR)
|
|
testq $16, %rdi
|
|
jz L(A32)
|
|
movdqu (%rdi, %rsi), %xmm0
|
|
pcmpeqb (%rdi), %xmm0
|
|
pmovmskb %xmm0, %edx
|
|
subl $0xffff, %edx
|
|
jnz L(neq)
|
|
addq $16, %rdi
|
|
L(A32):
|
|
movq %r11, %r10
|
|
andq $-32, %r10
|
|
cmpq %r10, %rdi
|
|
jae L(mt16)
|
|
/* Pre-unroll to be ready for unrolled 64B loop. */
|
|
testq $32, %rdi
|
|
jz L(A64)
|
|
movdqu (%rdi,%rsi), %xmm0
|
|
pcmpeqb (%rdi), %xmm0
|
|
pmovmskb %xmm0, %edx
|
|
subl $0xffff, %edx
|
|
jnz L(neq)
|
|
addq $16, %rdi
|
|
|
|
movdqu (%rdi,%rsi), %xmm0
|
|
pcmpeqb (%rdi), %xmm0
|
|
pmovmskb %xmm0, %edx
|
|
subl $0xffff, %edx
|
|
jnz L(neq)
|
|
addq $16, %rdi
|
|
|
|
L(A64):
|
|
movq %r11, %r10
|
|
andq $-64, %r10
|
|
cmpq %r10, %rdi
|
|
jae L(mt32)
|
|
|
|
L(A64main):
|
|
movdqu (%rdi,%rsi), %xmm0
|
|
pcmpeqb (%rdi), %xmm0
|
|
pmovmskb %xmm0, %edx
|
|
subl $0xffff, %edx
|
|
jnz L(neq)
|
|
addq $16, %rdi
|
|
|
|
movdqu (%rdi,%rsi), %xmm0
|
|
pcmpeqb (%rdi), %xmm0
|
|
pmovmskb %xmm0, %edx
|
|
subl $0xffff, %edx
|
|
jnz L(neq)
|
|
addq $16, %rdi
|
|
|
|
movdqu (%rdi,%rsi), %xmm0
|
|
pcmpeqb (%rdi), %xmm0
|
|
pmovmskb %xmm0, %edx
|
|
subl $0xffff, %edx
|
|
jnz L(neq)
|
|
addq $16, %rdi
|
|
|
|
movdqu (%rdi,%rsi), %xmm0
|
|
pcmpeqb (%rdi), %xmm0
|
|
pmovmskb %xmm0, %edx
|
|
subl $0xffff, %edx
|
|
jnz L(neq)
|
|
addq $16, %rdi
|
|
|
|
cmpq %rdi, %r10
|
|
jne L(A64main)
|
|
|
|
L(mt32):
|
|
movq %r11, %r10
|
|
andq $-32, %r10
|
|
cmpq %r10, %rdi
|
|
jae L(mt16)
|
|
|
|
L(A32main):
|
|
movdqu (%rdi,%rsi), %xmm0
|
|
pcmpeqb (%rdi), %xmm0
|
|
pmovmskb %xmm0, %edx
|
|
subl $0xffff, %edx
|
|
jnz L(neq)
|
|
addq $16, %rdi
|
|
|
|
movdqu (%rdi,%rsi), %xmm0
|
|
pcmpeqb (%rdi), %xmm0
|
|
pmovmskb %xmm0, %edx
|
|
subl $0xffff, %edx
|
|
jnz L(neq)
|
|
addq $16, %rdi
|
|
|
|
cmpq %rdi, %r10
|
|
jne L(A32main)
|
|
L(mt16):
|
|
subq %rdi, %r11
|
|
je L(finz)
|
|
movq %r11, %r10
|
|
jmp L(small)
|
|
|
|
.p2align 4,, 4
|
|
L(neq):
|
|
bsfl %edx, %ecx
|
|
movzbl (%rdi, %rcx), %eax
|
|
addq %rdi, %rsi
|
|
movzbl (%rsi,%rcx), %edx
|
|
jmp L(finz1)
|
|
|
|
.p2align 4,, 4
|
|
L(ATR):
|
|
movq %r11, %r10
|
|
andq $-32, %r10
|
|
cmpq %r10, %rdi
|
|
jae L(mt16)
|
|
testq $16, %rdi
|
|
jz L(ATR32)
|
|
|
|
movdqa (%rdi,%rsi), %xmm0
|
|
pcmpeqb (%rdi), %xmm0
|
|
pmovmskb %xmm0, %edx
|
|
subl $0xffff, %edx
|
|
jnz L(neq)
|
|
addq $16, %rdi
|
|
cmpq %rdi, %r10
|
|
je L(mt16)
|
|
|
|
L(ATR32):
|
|
movq %r11, %r10
|
|
andq $-64, %r10
|
|
testq $32, %rdi
|
|
jz L(ATR64)
|
|
|
|
movdqa (%rdi,%rsi), %xmm0
|
|
pcmpeqb (%rdi), %xmm0
|
|
pmovmskb %xmm0, %edx
|
|
subl $0xffff, %edx
|
|
jnz L(neq)
|
|
addq $16, %rdi
|
|
|
|
movdqa (%rdi,%rsi), %xmm0
|
|
pcmpeqb (%rdi), %xmm0
|
|
pmovmskb %xmm0, %edx
|
|
subl $0xffff, %edx
|
|
jnz L(neq)
|
|
addq $16, %rdi
|
|
|
|
L(ATR64):
|
|
cmpq %rdi, %r10
|
|
je L(mt32)
|
|
|
|
L(ATR64main):
|
|
movdqa (%rdi,%rsi), %xmm0
|
|
pcmpeqb (%rdi), %xmm0
|
|
pmovmskb %xmm0, %edx
|
|
subl $0xffff, %edx
|
|
jnz L(neq)
|
|
addq $16, %rdi
|
|
|
|
movdqa (%rdi,%rsi), %xmm0
|
|
pcmpeqb (%rdi), %xmm0
|
|
pmovmskb %xmm0, %edx
|
|
subl $0xffff, %edx
|
|
jnz L(neq)
|
|
addq $16, %rdi
|
|
|
|
movdqa (%rdi,%rsi), %xmm0
|
|
pcmpeqb (%rdi), %xmm0
|
|
pmovmskb %xmm0, %edx
|
|
subl $0xffff, %edx
|
|
jnz L(neq)
|
|
addq $16, %rdi
|
|
|
|
movdqa (%rdi,%rsi), %xmm0
|
|
pcmpeqb (%rdi), %xmm0
|
|
pmovmskb %xmm0, %edx
|
|
subl $0xffff, %edx
|
|
jnz L(neq)
|
|
addq $16, %rdi
|
|
cmpq %rdi, %r10
|
|
jne L(ATR64main)
|
|
|
|
movq %r11, %r10
|
|
andq $-32, %r10
|
|
cmpq %r10, %rdi
|
|
jae L(mt16)
|
|
|
|
L(ATR32res):
|
|
movdqa (%rdi,%rsi), %xmm0
|
|
pcmpeqb (%rdi), %xmm0
|
|
pmovmskb %xmm0, %edx
|
|
subl $0xffff, %edx
|
|
jnz L(neq)
|
|
addq $16, %rdi
|
|
|
|
movdqa (%rdi,%rsi), %xmm0
|
|
pcmpeqb (%rdi), %xmm0
|
|
pmovmskb %xmm0, %edx
|
|
subl $0xffff, %edx
|
|
jnz L(neq)
|
|
addq $16, %rdi
|
|
|
|
cmpq %r10, %rdi
|
|
jne L(ATR32res)
|
|
|
|
subq %rdi, %r11
|
|
je L(finz)
|
|
movq %r11, %r10
|
|
jmp L(small)
|
|
/* Align to 16byte to improve instruction fetch. */
|
|
.p2align 4,, 4
|
|
END(memcmp)
|
|
|
|
#undef bcmp
|
|
weak_alias (memcmp, bcmp)
|
|
libc_hidden_builtin_def (memcmp)
|