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/* strcat with SSE2
Copyright (C) 2011-2021 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
The GNU C Library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; if not, see
<https://www.gnu.org/licenses/>. */
#if IS_IN (libc)
# include <sysdep.h>
# ifndef STRCAT
# define STRCAT __strcat_sse2_unaligned
# endif
# define USE_AS_STRCAT
.text
ENTRY (STRCAT)
mov %rdi, %r9
# ifdef USE_AS_STRNCAT
mov %rdx, %r8
# endif
/* Inline corresponding strlen file, temporary until new strcpy
implementation gets merged. */
xor %rax, %rax
mov %edi, %ecx
and $0x3f, %ecx
pxor %xmm0, %xmm0
cmp $0x30, %ecx
ja L(next)
movdqu (%rdi), %xmm1
pcmpeqb %xmm1, %xmm0
pmovmskb %xmm0, %edx
test %edx, %edx
jnz L(exit_less16)
mov %rdi, %rax
and $-16, %rax
jmp L(align16_start)
L(next):
mov %rdi, %rax
and $-16, %rax
pcmpeqb (%rax), %xmm0
mov $-1, %r10d
sub %rax, %rcx
shl %cl, %r10d
pmovmskb %xmm0, %edx
and %r10d, %edx
jnz L(exit)
L(align16_start):
pxor %xmm0, %xmm0
pxor %xmm1, %xmm1
pxor %xmm2, %xmm2
pxor %xmm3, %xmm3
pcmpeqb 16(%rax), %xmm0
pmovmskb %xmm0, %edx
test %edx, %edx
jnz L(exit16)
pcmpeqb 32(%rax), %xmm1
pmovmskb %xmm1, %edx
test %edx, %edx
jnz L(exit32)
pcmpeqb 48(%rax), %xmm2
pmovmskb %xmm2, %edx
test %edx, %edx
jnz L(exit48)
pcmpeqb 64(%rax), %xmm3
pmovmskb %xmm3, %edx
test %edx, %edx
jnz L(exit64)
pcmpeqb 80(%rax), %xmm0
add $64, %rax
pmovmskb %xmm0, %edx
test %edx, %edx
jnz L(exit16)
pcmpeqb 32(%rax), %xmm1
pmovmskb %xmm1, %edx
test %edx, %edx
jnz L(exit32)
pcmpeqb 48(%rax), %xmm2
pmovmskb %xmm2, %edx
test %edx, %edx
jnz L(exit48)
pcmpeqb 64(%rax), %xmm3
pmovmskb %xmm3, %edx
test %edx, %edx
jnz L(exit64)
pcmpeqb 80(%rax), %xmm0
add $64, %rax
pmovmskb %xmm0, %edx
test %edx, %edx
jnz L(exit16)
pcmpeqb 32(%rax), %xmm1
pmovmskb %xmm1, %edx
test %edx, %edx
jnz L(exit32)
pcmpeqb 48(%rax), %xmm2
pmovmskb %xmm2, %edx
test %edx, %edx
jnz L(exit48)
pcmpeqb 64(%rax), %xmm3
pmovmskb %xmm3, %edx
test %edx, %edx
jnz L(exit64)
pcmpeqb 80(%rax), %xmm0
add $64, %rax
pmovmskb %xmm0, %edx
test %edx, %edx
jnz L(exit16)
pcmpeqb 32(%rax), %xmm1
pmovmskb %xmm1, %edx
test %edx, %edx
jnz L(exit32)
pcmpeqb 48(%rax), %xmm2
pmovmskb %xmm2, %edx
test %edx, %edx
jnz L(exit48)
pcmpeqb 64(%rax), %xmm3
pmovmskb %xmm3, %edx
test %edx, %edx
jnz L(exit64)
test $0x3f, %rax
jz L(align64_loop)
pcmpeqb 80(%rax), %xmm0
add $80, %rax
pmovmskb %xmm0, %edx
test %edx, %edx
jnz L(exit)
test $0x3f, %rax
jz L(align64_loop)
pcmpeqb 16(%rax), %xmm1
add $16, %rax
pmovmskb %xmm1, %edx
test %edx, %edx
jnz L(exit)
test $0x3f, %rax
jz L(align64_loop)
pcmpeqb 16(%rax), %xmm2
add $16, %rax
pmovmskb %xmm2, %edx
test %edx, %edx
jnz L(exit)
test $0x3f, %rax
jz L(align64_loop)
pcmpeqb 16(%rax), %xmm3
add $16, %rax
pmovmskb %xmm3, %edx
test %edx, %edx
jnz L(exit)
add $16, %rax
.p2align 4
L(align64_loop):
movaps (%rax), %xmm4
pminub 16(%rax), %xmm4
movaps 32(%rax), %xmm5
pminub 48(%rax), %xmm5
add $64, %rax
pminub %xmm4, %xmm5
pcmpeqb %xmm0, %xmm5
pmovmskb %xmm5, %edx
test %edx, %edx
jz L(align64_loop)
pcmpeqb -64(%rax), %xmm0
sub $80, %rax
pmovmskb %xmm0, %edx
test %edx, %edx
jnz L(exit16)
pcmpeqb 32(%rax), %xmm1
pmovmskb %xmm1, %edx
test %edx, %edx
jnz L(exit32)
pcmpeqb 48(%rax), %xmm2
pmovmskb %xmm2, %edx
test %edx, %edx
jnz L(exit48)
pcmpeqb 64(%rax), %xmm3
pmovmskb %xmm3, %edx
sub %rdi, %rax
bsf %rdx, %rdx
add %rdx, %rax
add $64, %rax
jmp L(StartStrcpyPart)
.p2align 4
L(exit):
sub %rdi, %rax
L(exit_less16):
bsf %rdx, %rdx
add %rdx, %rax
jmp L(StartStrcpyPart)
.p2align 4
L(exit16):
sub %rdi, %rax
bsf %rdx, %rdx
add %rdx, %rax
add $16, %rax
jmp L(StartStrcpyPart)
.p2align 4
L(exit32):
sub %rdi, %rax
bsf %rdx, %rdx
add %rdx, %rax
add $32, %rax
jmp L(StartStrcpyPart)
.p2align 4
L(exit48):
sub %rdi, %rax
bsf %rdx, %rdx
add %rdx, %rax
add $48, %rax
jmp L(StartStrcpyPart)
.p2align 4
L(exit64):
sub %rdi, %rax
bsf %rdx, %rdx
add %rdx, %rax
add $64, %rax
.p2align 4
L(StartStrcpyPart):
lea (%r9, %rax), %rdi
mov %rsi, %rcx
mov %r9, %rax /* save result */
# ifdef USE_AS_STRNCAT
test %r8, %r8
jz L(ExitZero)
# define USE_AS_STRNCPY
# endif
# include "strcpy-sse2-unaligned.S"
#endif
|
