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/* 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
|
