mirror of
git://sourceware.org/git/glibc.git
synced 2024-12-03 04:01:43 +08:00
261 lines
4.5 KiB
ArmAsm
261 lines
4.5 KiB
ArmAsm
/* strlen SSE2
|
|
Copyright (C) 2011 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, write to the Free
|
|
Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
|
|
02111-1307 USA. */
|
|
|
|
#if !defined NOT_IN_libc && (defined SHARED || defined USE_AS_STRCAT)
|
|
|
|
# ifndef USE_AS_STRCAT
|
|
|
|
# include <sysdep.h>
|
|
|
|
# define RETURN ret
|
|
|
|
.section .text.sse2,"ax",@progbits
|
|
ENTRY (__strlen_sse2_pminub)
|
|
|
|
# endif
|
|
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
|
|
RETURN
|
|
|
|
.p2align 4
|
|
L(exit):
|
|
sub %rdi, %rax
|
|
L(exit_less16):
|
|
bsf %rdx, %rdx
|
|
add %rdx, %rax
|
|
RETURN
|
|
.p2align 4
|
|
L(exit16):
|
|
sub %rdi, %rax
|
|
bsf %rdx, %rdx
|
|
add %rdx, %rax
|
|
add $16, %rax
|
|
RETURN
|
|
.p2align 4
|
|
L(exit32):
|
|
sub %rdi, %rax
|
|
bsf %rdx, %rdx
|
|
add %rdx, %rax
|
|
add $32, %rax
|
|
RETURN
|
|
.p2align 4
|
|
L(exit48):
|
|
sub %rdi, %rax
|
|
bsf %rdx, %rdx
|
|
add %rdx, %rax
|
|
add $48, %rax
|
|
RETURN
|
|
.p2align 4
|
|
L(exit64):
|
|
sub %rdi, %rax
|
|
bsf %rdx, %rdx
|
|
add %rdx, %rax
|
|
add $64, %rax
|
|
# ifndef USE_AS_STRCAT
|
|
RETURN
|
|
|
|
END (__strlen_sse2_pminub)
|
|
# endif
|
|
#endif
|