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* sysdeps/x86_64/strlen.S: Replace with new SSE2 based implementation

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which is faster on all x86_64 architectures.
	Tested on AMD, Intel Nehalem, SNB, IVB.
This commit is contained in:
Ondrej Bilka 2013-03-06 21:41:32 +01:00
parent 39120df9b9
commit b79188d717
13 changed files with 764 additions and 1307 deletions
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23
ChangeLog
View File

@ -1,3 +1,26 @@
2013-03-06 Ondrej Bilka <neleai@seznam.cz>
* sysdeps/x86_64/strlen.S: Replace with new SSE2 based
implementation which is faster on all x86_64 architectures.
Tested on AMD, Intel Nehalem, SNB, IVB.
* sysdeps/x86_64/strnlen.S: Likewise.
* sysdeps/x86_64/multiarch/Makefile (sysdep_routines):
Remove all multiarch strlen and strnlen versions.
* sysdeps/x86_64/multiarch/ifunc-impl-list.c: Update.
Remove strlen and strnlen related parts.
* sysdeps/x86_64/multiarch/strcat-sse2-unaligned.S: Update.
Inline strlen part.
* sysdeps/x86_64/multiarch/strcat-ssse3.S: Likewise.
* sysdeps/x86_64/multiarch/strlen.S: Remove.
* sysdeps/x86_64/multiarch/strlen-sse2-no-bsf.S: Likewise.
* sysdeps/x86_64/multiarch/strlen-sse2-pminub.S: Likewise.
* sysdeps/x86_64/multiarch/strlen-sse4.S: Likewise.
* sysdeps/x86_64/multiarch/strnlen.S: Likewise.
* sysdeps/x86_64/multiarch/strnlen-sse2-no-bsf.S: Likewise.
2013-03-06 Patsy Franklin <pfrankli@redhat.com>
* io/fcntl.h: Added a comment about AT_EACCESS and AT_REMOVEDIR.

6
sysdeps/x86_64/multiarch/Makefile
View File

@ -10,14 +10,12 @@ sysdep_routines += strncat-c stpncpy-c strncpy-c strcmp-ssse3 strncmp-ssse3 \
strend-sse4 memcmp-sse4 memcpy-ssse3 mempcpy-ssse3 \
memmove-ssse3 memcpy-ssse3-back mempcpy-ssse3-back \
memmove-ssse3-back strcasestr-nonascii strcasecmp_l-ssse3 \
strncase_l-ssse3 strlen-sse4 strlen-sse2-no-bsf memset-x86-64 \
strncase_l-ssse3 memset-x86-64 strcat-ssse3 strncat-ssse3\
strcpy-ssse3 strncpy-ssse3 stpcpy-ssse3 stpncpy-ssse3 \
strcpy-sse2-unaligned strncpy-sse2-unaligned \
stpcpy-sse2-unaligned stpncpy-sse2-unaligned \
strcat-sse2-unaligned strncat-sse2-unaligned \
strcat-ssse3 strncat-ssse3 strlen-sse2-pminub \
strnlen-sse2-no-bsf strrchr-sse2-no-bsf strchr-sse2-no-bsf \
memcmp-ssse3
strrchr-sse2-no-bsf strchr-sse2-no-bsf memcmp-ssse3
ifeq (yes,$(config-cflags-sse4))
sysdep_routines += strcspn-c strpbrk-c strspn-c strstr-c strcasestr-c varshift
CFLAGS-varshift.c += -msse4

13
sysdeps/x86_64/multiarch/ifunc-impl-list.c
View File

@ -187,11 +187,6 @@ __libc_ifunc_impl_list (const char *name, struct libc_ifunc_impl *array,
__strncpy_sse2_unaligned)
IFUNC_IMPL_ADD (array, i, strncpy, 1, __strncpy_sse2))
/* Support sysdeps/x86_64/multiarch/strnlen.S. */
IFUNC_IMPL (i, name, strnlen,
IFUNC_IMPL_ADD (array, i, strnlen, 1, __strnlen_sse2_no_bsf)
IFUNC_IMPL_ADD (array, i, strnlen, 1, __strnlen_sse2))
/* Support sysdeps/x86_64/multiarch/strpbrk.S. */
IFUNC_IMPL (i, name, strpbrk,
IFUNC_IMPL_ADD (array, i, strpbrk, HAS_SSE4_2,
@ -262,14 +257,6 @@ __libc_ifunc_impl_list (const char *name, struct libc_ifunc_impl *array,
__mempcpy_ssse3)
IFUNC_IMPL_ADD (array, i, mempcpy, 1, __mempcpy_sse2))
/* Support sysdeps/x86_64/multiarch/strlen.S. */
IFUNC_IMPL (i, name, strlen,
IFUNC_IMPL_ADD (array, i, strlen, HAS_SSE4_2, __strlen_sse42)
IFUNC_IMPL_ADD (array, i, strlen, 1, __strlen_sse2_pminub)
IFUNC_IMPL_ADD (array, i, strlen, 1, __strlen_sse2_no_bsf)
IFUNC_IMPL_ADD (array, i, strlen, 1, __strlen_sse2)
IFUNC_IMPL_ADD (array, i, strlen, 1, __strlen_sse2))
/* Support sysdeps/x86_64/multiarch/strncmp.S. */
IFUNC_IMPL (i, name, strncmp,
IFUNC_IMPL_ADD (array, i, strncmp, HAS_SSE4_2,

229
sysdeps/x86_64/multiarch/strcat-sse2-unaligned.S
View File

@ -34,10 +34,233 @@ ENTRY (STRCAT)
mov %rdx, %r8
# endif
# define RETURN jmp L(StartStrcpyPart)
# include "strlen-sse2-pminub.S"
# undef RETURN
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

312
sysdeps/x86_64/multiarch/strcat-ssse3.S
View File

@ -33,11 +33,317 @@ ENTRY (STRCAT)
mov %rdx, %r8
# endif
# define RETURN jmp L(StartStrcpyPart)
# include "strlen-sse2-no-bsf.S"
xor %eax, %eax
cmpb $0, (%rdi)
jz L(exit_tail0)
cmpb $0, 1(%rdi)
jz L(exit_tail1)
cmpb $0, 2(%rdi)
jz L(exit_tail2)
cmpb $0, 3(%rdi)
jz L(exit_tail3)
# undef RETURN
cmpb $0, 4(%rdi)
jz L(exit_tail4)
cmpb $0, 5(%rdi)
jz L(exit_tail5)
cmpb $0, 6(%rdi)
jz L(exit_tail6)
cmpb $0, 7(%rdi)
jz L(exit_tail7)
cmpb $0, 8(%rdi)
jz L(exit_tail8)
cmpb $0, 9(%rdi)
jz L(exit_tail9)
cmpb $0, 10(%rdi)
jz L(exit_tail10)
cmpb $0, 11(%rdi)
jz L(exit_tail11)
cmpb $0, 12(%rdi)
jz L(exit_tail12)
cmpb $0, 13(%rdi)
jz L(exit_tail13)
cmpb $0, 14(%rdi)
jz L(exit_tail14)
cmpb $0, 15(%rdi)
jz L(exit_tail15)
pxor %xmm0, %xmm0
lea 16(%rdi), %rcx
lea 16(%rdi), %rax
and $-16, %rax
pcmpeqb (%rax), %xmm0
pmovmskb %xmm0, %edx
pxor %xmm1, %xmm1
test %edx, %edx
lea 16(%rax), %rax
jnz L(exit)
pcmpeqb (%rax), %xmm1
pmovmskb %xmm1, %edx
pxor %xmm2, %xmm2
test %edx, %edx
lea 16(%rax), %rax
jnz L(exit)
pcmpeqb (%rax), %xmm2
pmovmskb %xmm2, %edx
pxor %xmm3, %xmm3
test %edx, %edx
lea 16(%rax), %rax
jnz L(exit)
pcmpeqb (%rax), %xmm3
pmovmskb %xmm3, %edx
test %edx, %edx
lea 16(%rax), %rax
jnz L(exit)
pcmpeqb (%rax), %xmm0
pmovmskb %xmm0, %edx
test %edx, %edx
lea 16(%rax), %rax
jnz L(exit)
pcmpeqb (%rax), %xmm1
pmovmskb %xmm1, %edx
test %edx, %edx
lea 16(%rax), %rax
jnz L(exit)
pcmpeqb (%rax), %xmm2
pmovmskb %xmm2, %edx
test %edx, %edx
lea 16(%rax), %rax
jnz L(exit)
pcmpeqb (%rax), %xmm3
pmovmskb %xmm3, %edx
test %edx, %edx
lea 16(%rax), %rax
jnz L(exit)
pcmpeqb (%rax), %xmm0
pmovmskb %xmm0, %edx
test %edx, %edx
lea 16(%rax), %rax
jnz L(exit)
pcmpeqb (%rax), %xmm1
pmovmskb %xmm1, %edx
test %edx, %edx
lea 16(%rax), %rax
jnz L(exit)
pcmpeqb (%rax), %xmm2
pmovmskb %xmm2, %edx
test %edx, %edx
lea 16(%rax), %rax
jnz L(exit)
pcmpeqb (%rax), %xmm3
pmovmskb %xmm3, %edx
test %edx, %edx
lea 16(%rax), %rax
jnz L(exit)
pcmpeqb (%rax), %xmm0
pmovmskb %xmm0, %edx
test %edx, %edx
lea 16(%rax), %rax
jnz L(exit)
pcmpeqb (%rax), %xmm1
pmovmskb %xmm1, %edx
test %edx, %edx
lea 16(%rax), %rax
jnz L(exit)
pcmpeqb (%rax), %xmm2
pmovmskb %xmm2, %edx
test %edx, %edx
lea 16(%rax), %rax
jnz L(exit)
pcmpeqb (%rax), %xmm3
pmovmskb %xmm3, %edx
test %edx, %edx
lea 16(%rax), %rax
jnz L(exit)
and $-0x40, %rax
.p2align 4
L(aligned_64):
pcmpeqb (%rax), %xmm0
pcmpeqb 16(%rax), %xmm1
pcmpeqb 32(%rax), %xmm2
pcmpeqb 48(%rax), %xmm3
pmovmskb %xmm0, %edx
pmovmskb %xmm1, %r11d
pmovmskb %xmm2, %r10d
pmovmskb %xmm3, %r9d
or %edx, %r9d
or %r11d, %r9d
or %r10d, %r9d
lea 64(%rax), %rax
jz L(aligned_64)
test %edx, %edx
jnz L(aligned_64_exit_16)
test %r11d, %r11d
jnz L(aligned_64_exit_32)
test %r10d, %r10d
jnz L(aligned_64_exit_48)
L(aligned_64_exit_64):
pmovmskb %xmm3, %edx
jmp L(exit)
L(aligned_64_exit_48):
lea -16(%rax), %rax
mov %r10d, %edx
jmp L(exit)
L(aligned_64_exit_32):
lea -32(%rax), %rax
mov %r11d, %edx
jmp L(exit)
L(aligned_64_exit_16):
lea -48(%rax), %rax
L(exit):
sub %rcx, %rax
test %dl, %dl
jz L(exit_high)
test $0x01, %dl
jnz L(exit_tail0)
test $0x02, %dl
jnz L(exit_tail1)
test $0x04, %dl
jnz L(exit_tail2)
test $0x08, %dl
jnz L(exit_tail3)
test $0x10, %dl
jnz L(exit_tail4)
test $0x20, %dl
jnz L(exit_tail5)
test $0x40, %dl
jnz L(exit_tail6)
add $7, %eax
L(exit_tail0):
jmp L(StartStrcpyPart)
.p2align 4
L(exit_high):
add $8, %eax
test $0x01, %dh
jnz L(exit_tail0)
test $0x02, %dh
jnz L(exit_tail1)
test $0x04, %dh
jnz L(exit_tail2)
test $0x08, %dh
jnz L(exit_tail3)
test $0x10, %dh
jnz L(exit_tail4)
test $0x20, %dh
jnz L(exit_tail5)
test $0x40, %dh
jnz L(exit_tail6)
add $7, %eax
jmp L(StartStrcpyPart)
.p2align 4
L(exit_tail1):
add $1, %eax
jmp L(StartStrcpyPart)
.p2align 4
L(exit_tail2):
add $2, %eax
jmp L(StartStrcpyPart)
.p2align 4
L(exit_tail3):
add $3, %eax
jmp L(StartStrcpyPart)
.p2align 4
L(exit_tail4):
add $4, %eax
jmp L(StartStrcpyPart)
.p2align 4
L(exit_tail5):
add $5, %eax
jmp L(StartStrcpyPart)
.p2align 4
L(exit_tail6):
add $6, %eax
jmp L(StartStrcpyPart)
.p2align 4
L(exit_tail7):
add $7, %eax
jmp L(StartStrcpyPart)
.p2align 4
L(exit_tail8):
add $8, %eax
jmp L(StartStrcpyPart)
.p2align 4
L(exit_tail9):
add $9, %eax
jmp L(StartStrcpyPart)
.p2align 4
L(exit_tail10):
add $10, %eax
jmp L(StartStrcpyPart)
.p2align 4
L(exit_tail11):
add $11, %eax
jmp L(StartStrcpyPart)
.p2align 4
L(exit_tail12):
add $12, %eax
jmp L(StartStrcpyPart)
.p2align 4
L(exit_tail13):
add $13, %eax
jmp L(StartStrcpyPart)
.p2align 4
L(exit_tail14):
add $14, %eax
jmp L(StartStrcpyPart)
.p2align 4
L(exit_tail15):
add $15, %eax
.p2align 4
L(StartStrcpyPart):
mov %rsi, %rcx
lea (%rdi, %rax), %rdx

685
sysdeps/x86_64/multiarch/strlen-sse2-no-bsf.S
View File

@ -1,685 +0,0 @@
/* strlen SSE2 without bsf
Copyright (C) 2010-2013 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
<http://www.gnu.org/licenses/>. */
/* only for strlen case we don't use optimized version for STATIC build just for SHARED */
#if (defined SHARED || defined USE_AS_STRCAT || defined USE_AS_STRNLEN) && !defined NOT_IN_libc
# ifndef USE_AS_STRCAT
# include <sysdep.h>
# define RETURN ret
# ifndef STRLEN
# define STRLEN __strlen_sse2_no_bsf
# endif
atom_text_section
ENTRY (STRLEN)
# endif
xor %eax, %eax
# ifdef USE_AS_STRNLEN
mov %rsi, %r8
sub $4, %rsi
jbe L(len_less4_prolog)
# endif
cmpb $0, (%rdi)
jz L(exit_tail0)
cmpb $0, 1(%rdi)
jz L(exit_tail1)
cmpb $0, 2(%rdi)
jz L(exit_tail2)
cmpb $0, 3(%rdi)
jz L(exit_tail3)
# ifdef USE_AS_STRNLEN
sub $4, %rsi
jbe L(len_less8_prolog)
# endif
cmpb $0, 4(%rdi)
jz L(exit_tail4)
cmpb $0, 5(%rdi)
jz L(exit_tail5)
cmpb $0, 6(%rdi)
jz L(exit_tail6)
cmpb $0, 7(%rdi)
jz L(exit_tail7)
# ifdef USE_AS_STRNLEN
sub $4, %rsi
jbe L(len_less12_prolog)
# endif
cmpb $0, 8(%rdi)
jz L(exit_tail8)
cmpb $0, 9(%rdi)
jz L(exit_tail9)
cmpb $0, 10(%rdi)
jz L(exit_tail10)
cmpb $0, 11(%rdi)
jz L(exit_tail11)
# ifdef USE_AS_STRNLEN
sub $4, %rsi
jbe L(len_less16_prolog)
# endif
cmpb $0, 12(%rdi)
jz L(exit_tail12)
cmpb $0, 13(%rdi)
jz L(exit_tail13)
cmpb $0, 14(%rdi)
jz L(exit_tail14)
cmpb $0, 15(%rdi)
jz L(exit_tail15)
pxor %xmm0, %xmm0
lea 16(%rdi), %rcx
lea 16(%rdi), %rax
and $-16, %rax
# ifdef USE_AS_STRNLEN
and $15, %rdi
add %rdi, %rsi
sub $64, %rsi
jbe L(len_less64)
# endif
pcmpeqb (%rax), %xmm0
pmovmskb %xmm0, %edx
pxor %xmm1, %xmm1
test %edx, %edx
lea 16(%rax), %rax
jnz L(exit)
pcmpeqb (%rax), %xmm1
pmovmskb %xmm1, %edx
pxor %xmm2, %xmm2
test %edx, %edx
lea 16(%rax), %rax
jnz L(exit)
pcmpeqb (%rax), %xmm2
pmovmskb %xmm2, %edx
pxor %xmm3, %xmm3
test %edx, %edx
lea 16(%rax), %rax
jnz L(exit)
pcmpeqb (%rax), %xmm3
pmovmskb %xmm3, %edx
test %edx, %edx
lea 16(%rax), %rax
jnz L(exit)
# ifdef USE_AS_STRNLEN
sub $64, %rsi
jbe L(len_less64)
# endif
pcmpeqb (%rax), %xmm0
pmovmskb %xmm0, %edx
test %edx, %edx
lea 16(%rax), %rax
jnz L(exit)
pcmpeqb (%rax), %xmm1
pmovmskb %xmm1, %edx
test %edx, %edx
lea 16(%rax), %rax
jnz L(exit)
pcmpeqb (%rax), %xmm2
pmovmskb %xmm2, %edx
test %edx, %edx
lea 16(%rax), %rax
jnz L(exit)
pcmpeqb (%rax), %xmm3
pmovmskb %xmm3, %edx
test %edx, %edx
lea 16(%rax), %rax
jnz L(exit)
# ifdef USE_AS_STRNLEN
sub $64, %rsi
jbe L(len_less64)
# endif
pcmpeqb (%rax), %xmm0
pmovmskb %xmm0, %edx
test %edx, %edx
lea 16(%rax), %rax
jnz L(exit)
pcmpeqb (%rax), %xmm1
pmovmskb %xmm1, %edx
test %edx, %edx
lea 16(%rax), %rax
jnz L(exit)
pcmpeqb (%rax), %xmm2
pmovmskb %xmm2, %edx
test %edx, %edx
lea 16(%rax), %rax
jnz L(exit)
pcmpeqb (%rax), %xmm3
pmovmskb %xmm3, %edx
test %edx, %edx
lea 16(%rax), %rax
jnz L(exit)
# ifdef USE_AS_STRNLEN
sub $64, %rsi
jbe L(len_less64)
# endif
pcmpeqb (%rax), %xmm0
pmovmskb %xmm0, %edx
test %edx, %edx
lea 16(%rax), %rax
jnz L(exit)
pcmpeqb (%rax), %xmm1
pmovmskb %xmm1, %edx
test %edx, %edx
lea 16(%rax), %rax
jnz L(exit)
pcmpeqb (%rax), %xmm2
pmovmskb %xmm2, %edx
test %edx, %edx
lea 16(%rax), %rax
jnz L(exit)
pcmpeqb (%rax), %xmm3
pmovmskb %xmm3, %edx
test %edx, %edx
lea 16(%rax), %rax
jnz L(exit)
# ifdef USE_AS_STRNLEN
mov %rax, %rdx
and $63, %rdx
add %rdx, %rsi
# endif
and $-0x40, %rax
.p2align 4
L(aligned_64):
# ifdef USE_AS_STRNLEN
sub $64, %rsi
jbe L(len_less64)
# endif
pcmpeqb (%rax), %xmm0
pcmpeqb 16(%rax), %xmm1
pcmpeqb 32(%rax), %xmm2
pcmpeqb 48(%rax), %xmm3
pmovmskb %xmm0, %edx
pmovmskb %xmm1, %r11d
pmovmskb %xmm2, %r10d
pmovmskb %xmm3, %r9d
or %edx, %r9d
or %r11d, %r9d
or %r10d, %r9d
lea 64(%rax), %rax
jz L(aligned_64)
test %edx, %edx
jnz L(aligned_64_exit_16)
test %r11d, %r11d
jnz L(aligned_64_exit_32)
test %r10d, %r10d
jnz L(aligned_64_exit_48)
L(aligned_64_exit_64):
pmovmskb %xmm3, %edx
jmp L(aligned_64_exit)
L(aligned_64_exit_48):
lea -16(%rax), %rax
mov %r10d, %edx
jmp L(aligned_64_exit)
L(aligned_64_exit_32):
lea -32(%rax), %rax
mov %r11d, %edx
jmp L(aligned_64_exit)
L(aligned_64_exit_16):
lea -48(%rax), %rax
L(aligned_64_exit):
L(exit):
sub %rcx, %rax
test %dl, %dl
jz L(exit_high)
test $0x01, %dl
jnz L(exit_tail0)
test $0x02, %dl
jnz L(exit_tail1)
test $0x04, %dl
jnz L(exit_tail2)
test $0x08, %dl
jnz L(exit_tail3)
test $0x10, %dl
jnz L(exit_tail4)
test $0x20, %dl
jnz L(exit_tail5)
test $0x40, %dl
jnz L(exit_tail6)
add $7, %eax
L(exit_tail0):
RETURN
L(exit_high):
add $8, %eax
test $0x01, %dh
jnz L(exit_tail0)
test $0x02, %dh
jnz L(exit_tail1)
test $0x04, %dh
jnz L(exit_tail2)
test $0x08, %dh
jnz L(exit_tail3)
test $0x10, %dh
jnz L(exit_tail4)
test $0x20, %dh
jnz L(exit_tail5)
test $0x40, %dh
jnz L(exit_tail6)
add $7, %eax
RETURN
# ifdef USE_AS_STRNLEN
.p2align 4
L(len_less64):
pxor %xmm0, %xmm0
add $64, %rsi
pcmpeqb (%rax), %xmm0
pmovmskb %xmm0, %edx
pxor %xmm1, %xmm1
lea 16(%rax), %rax
test %edx, %edx
jnz L(strnlen_exit)
sub $16, %rsi
jbe L(return_start_len)
pcmpeqb (%rax), %xmm1
pmovmskb %xmm1, %edx
lea 16(%rax), %rax
test %edx, %edx
jnz L(strnlen_exit)
sub $16, %rsi
jbe L(return_start_len)
pcmpeqb (%rax), %xmm0
pmovmskb %xmm0, %edx
lea 16(%rax), %rax
test %edx, %edx
jnz L(strnlen_exit)
sub $16, %rsi
jbe L(return_start_len)
pcmpeqb (%rax), %xmm1
pmovmskb %xmm1, %edx
lea 16(%rax), %rax
test %edx, %edx
jnz L(strnlen_exit)
mov %r8, %rax
ret
.p2align 4
L(strnlen_exit):
sub %rcx, %rax
test %dl, %dl
jz L(strnlen_exit_high)
mov %dl, %cl
and $15, %cl
jz L(strnlen_exit_8)
test $0x01, %dl
jnz L(exit_tail0)
test $0x02, %dl
jnz L(strnlen_exit_tail1)
test $0x04, %dl
jnz L(strnlen_exit_tail2)
sub $4, %rsi
jb L(return_start_len)
lea 3(%eax), %eax
ret
.p2align 4
L(strnlen_exit_8):
test $0x10, %dl
jnz L(strnlen_exit_tail4)
test $0x20, %dl
jnz L(strnlen_exit_tail5)
test $0x40, %dl
jnz L(strnlen_exit_tail6)
sub $8, %rsi
jb L(return_start_len)
lea 7(%eax), %eax
ret
.p2align 4
L(strnlen_exit_high):
mov %dh, %ch
and $15, %ch
jz L(strnlen_exit_high_8)
test $0x01, %dh
jnz L(strnlen_exit_tail8)
test $0x02, %dh
jnz L(strnlen_exit_tail9)
test $0x04, %dh
jnz L(strnlen_exit_tail10)
sub $12, %rsi
jb L(return_start_len)
lea 11(%eax), %eax
ret
.p2align 4
L(strnlen_exit_high_8):
test $0x10, %dh
jnz L(strnlen_exit_tail12)
test $0x20, %dh
jnz L(strnlen_exit_tail13)
test $0x40, %dh
jnz L(strnlen_exit_tail14)
sub $16, %rsi
jb L(return_start_len)
lea 15(%eax), %eax
ret
.p2align 4
L(strnlen_exit_tail1):
sub $2, %rsi
jb L(return_start_len)
lea 1(%eax), %eax
ret
.p2align 4
L(strnlen_exit_tail2):
sub $3, %rsi
jb L(return_start_len)
lea 2(%eax), %eax
ret
.p2align 4
L(strnlen_exit_tail4):
sub $5, %rsi
jb L(return_start_len)
lea 4(%eax), %eax
ret
.p2align 4
L(strnlen_exit_tail5):
sub $6, %rsi
jb L(return_start_len)
lea 5(%eax), %eax
ret
.p2align 4
L(strnlen_exit_tail6):
sub $7, %rsi
jb L(return_start_len)
lea 6(%eax), %eax
ret
.p2align 4
L(strnlen_exit_tail8):
sub $9, %rsi
jb L(return_start_len)
lea 8(%eax), %eax
ret
.p2align 4
L(strnlen_exit_tail9):
sub $10, %rsi
jb L(return_start_len)
lea 9(%eax), %eax
ret
.p2align 4
L(strnlen_exit_tail10):
sub $11, %rsi
jb L(return_start_len)
lea 10(%eax), %eax
ret
.p2align 4
L(strnlen_exit_tail12):
sub $13, %rsi
jb L(return_start_len)
lea 12(%eax), %eax
ret
.p2align 4
L(strnlen_exit_tail13):
sub $14, %rsi
jb L(return_start_len)
lea 13(%eax), %eax
ret
.p2align 4
L(strnlen_exit_tail14):
sub $15, %rsi
jb L(return_start_len)
lea 14(%eax), %eax
ret
.p2align 4
L(return_start_len):
mov %r8, %rax
ret
/* for prolog only */
.p2align 4
L(len_less4_prolog):
add $4, %rsi
jz L(exit_tail0)
cmpb $0, (%rdi)
jz L(exit_tail0)
cmp $1, %esi
je L(exit_tail1)
cmpb $0, 1(%rdi)
jz L(exit_tail1)
cmp $2, %esi
je L(exit_tail2)
cmpb $0, 2(%rdi)
jz L(exit_tail2)
cmp $3, %esi
je L(exit_tail3)
cmpb $0, 3(%rdi)
jz L(exit_tail3)
mov $4, %eax
ret
.p2align 4
L(len_less8_prolog):
add $4, %rsi
cmpb $0, 4(%rdi)
jz L(exit_tail4)
cmp $1, %esi
je L(exit_tail5)
cmpb $0, 5(%rdi)
jz L(exit_tail5)
cmp $2, %esi
je L(exit_tail6)
cmpb $0, 6(%rdi)
jz L(exit_tail6)
cmp $3, %esi
je L(exit_tail7)
cmpb $0, 7(%rdi)
jz L(exit_tail7)
mov $8, %eax
ret
.p2align 4
L(len_less12_prolog):
add $4, %rsi
cmpb $0, 8(%rdi)
jz L(exit_tail8)
cmp $1, %esi
je L(exit_tail9)
cmpb $0, 9(%rdi)
jz L(exit_tail9)
cmp $2, %esi
je L(exit_tail10)
cmpb $0, 10(%rdi)
jz L(exit_tail10)
cmp $3, %esi
je L(exit_tail11)
cmpb $0, 11(%rdi)
jz L(exit_tail11)
mov $12, %eax
ret
.p2align 4
L(len_less16_prolog):
add $4, %rsi
cmpb $0, 12(%rdi)
jz L(exit_tail12)
cmp $1, %esi
je L(exit_tail13)
cmpb $0, 13(%rdi)
jz L(exit_tail13)
cmp $2, %esi
je L(exit_tail14)
cmpb $0, 14(%rdi)
jz L(exit_tail14)
cmp $3, %esi
je L(exit_tail15)
cmpb $0, 15(%rdi)
jz L(exit_tail15)
mov $16, %eax
ret
# endif
.p2align 4
L(exit_tail1):
add $1, %eax
RETURN
.p2align 4
L(exit_tail2):
add $2, %eax
RETURN
.p2align 4
L(exit_tail3):
add $3, %eax
RETURN
.p2align 4
L(exit_tail4):
add $4, %eax
RETURN
.p2align 4
L(exit_tail5):
add $5, %eax
RETURN
.p2align 4
L(exit_tail6):
add $6, %eax
RETURN
.p2align 4
L(exit_tail7):
add $7, %eax
RETURN
.p2align 4
L(exit_tail8):
add $8, %eax
RETURN
.p2align 4
L(exit_tail9):
add $9, %eax
RETURN
.p2align 4
L(exit_tail10):
add $10, %eax
RETURN
.p2align 4
L(exit_tail11):
add $11, %eax
RETURN
.p2align 4
L(exit_tail12):
add $12, %eax
RETURN
.p2align 4
L(exit_tail13):
add $13, %eax
RETURN
.p2align 4
L(exit_tail14):
add $14, %eax
RETURN
.p2align 4
L(exit_tail15):
add $15, %eax
# ifndef USE_AS_STRCAT
RETURN
END (STRLEN)
# endif
#endif

259
sysdeps/x86_64/multiarch/strlen-sse2-pminub.S
View File

@ -1,259 +0,0 @@
/* strlen SSE2
Copyright (C) 2011-2013 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
<http://www.gnu.org/licenses/>. */
#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

84
sysdeps/x86_64/multiarch/strlen-sse4.S
View File

@ -1,84 +0,0 @@
/* strlen with SSE4
Copyright (C) 2009-2013 Free Software Foundation, Inc.
Contributed by Ulrich Drepper <drepper@redhat.com>.
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
<http://www.gnu.org/licenses/>. */
#if defined SHARED && !defined NOT_IN_libc
#include <sysdep.h>
.section .text.sse4.2,"ax",@progbits
ENTRY (__strlen_sse42)
pxor %xmm1, %xmm1
movl %edi, %ecx
movq %rdi, %r8
andq $~15, %rdi
xor %edi, %ecx
pcmpeqb (%rdi), %xmm1
pmovmskb %xmm1, %edx
shrl %cl, %edx
shll %cl, %edx
andl %edx, %edx
jnz L(less16bytes)
pxor %xmm1, %xmm1
.p2align 4
L(more64bytes_loop):
pcmpistri $0x08, 16(%rdi), %xmm1
jz L(more32bytes)
pcmpistri $0x08, 32(%rdi), %xmm1
jz L(more48bytes)
pcmpistri $0x08, 48(%rdi), %xmm1
jz L(more64bytes)
add $64, %rdi
pcmpistri $0x08, (%rdi), %xmm1
jnz L(more64bytes_loop)
leaq (%rdi,%rcx), %rax
subq %r8, %rax
ret
.p2align 4
L(more32bytes):
leaq 16(%rdi,%rcx, 1), %rax
subq %r8, %rax
ret
.p2align 4
L(more48bytes):
leaq 32(%rdi,%rcx, 1), %rax
subq %r8, %rax
ret
.p2align 4
L(more64bytes):
leaq 48(%rdi,%rcx, 1), %rax
subq %r8, %rax
ret
.p2align 4
L(less16bytes):
subq %r8, %rdi
bsfl %edx, %eax
addq %rdi, %rax
ret
END (__strlen_sse42)
#endif

68
sysdeps/x86_64/multiarch/strlen.S
View File

@ -1,68 +0,0 @@
/* Multiple versions of strlen(str) -- determine the length of the string STR.
All versions must be listed in ifunc-impl-list.c.
Copyright (C) 2009-2013 Free Software Foundation, Inc.
Contributed by Ulrich Drepper <drepper@redhat.com>.
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
<http://www.gnu.org/licenses/>. */
#include <sysdep.h>
#include <init-arch.h>
/* Define multiple versions only for the definition in libc and for
the DSO. In static binaries we need strlen before the initialization
happened. */
#if defined SHARED && !defined NOT_IN_libc
.text
ENTRY(strlen)
.type strlen, @gnu_indirect_function
cmpl $0, __cpu_features+KIND_OFFSET(%rip)
jne 1f
call __init_cpu_features
1: leaq __strlen_sse2_pminub(%rip), %rax
testl $bit_Prefer_PMINUB_for_stringop, __cpu_features+FEATURE_OFFSET+index_Prefer_PMINUB_for_stringop(%rip)
jnz 2f
leaq __strlen_sse2(%rip), %rax
testl $bit_SSE4_2, __cpu_features+CPUID_OFFSET+index_SSE4_2(%rip)
jz 2f
leaq __strlen_sse42(%rip), %rax
ret
2: testl $bit_Slow_BSF, __cpu_features+FEATURE_OFFSET+index_Slow_BSF(%rip)
jz 3f
leaq __strlen_sse2_no_bsf(%rip), %rax
3: ret
END(strlen)
# undef ENTRY
# define ENTRY(name) \
.type __strlen_sse2, @function; \
.align 16; \
.globl __strlen_sse2; \
.hidden __strlen_sse2; \
__strlen_sse2: cfi_startproc; \
CALL_MCOUNT
# undef END
# define END(name) \
cfi_endproc; .size __strlen_sse2, .-__strlen_sse2
# undef libc_hidden_builtin_def
/* It doesn't make sense to send libc-internal strlen calls through a PLT.
The speedup we get from using SSE4.2 instruction is likely eaten away
by the indirect call in the PLT. */
# define libc_hidden_builtin_def(name) \
.globl __GI_strlen; __GI_strlen = __strlen_sse2
#endif
#include "../strlen.S"

3
sysdeps/x86_64/multiarch/strnlen-sse2-no-bsf.S
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@ -1,3 +0,0 @@
#define USE_AS_STRNLEN
#define STRLEN __strnlen_sse2_no_bsf
#include "strlen-sse2-no-bsf.S"

57
sysdeps/x86_64/multiarch/strnlen.S
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@ -1,57 +0,0 @@
/* multiple version of strnlen
All versions must be listed in ifunc-impl-list.c.
Copyright (C) 2011-2013 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
<http://www.gnu.org/licenses/>. */
#include <sysdep.h>
#include <init-arch.h>
/* Define multiple versions only for the definition in libc. */
#ifndef NOT_IN_libc
.text
ENTRY(__strnlen)
.type __strnlen, @gnu_indirect_function
cmpl $0, __cpu_features+KIND_OFFSET(%rip)
jne 1f
call __init_cpu_features
1: leaq __strnlen_sse2(%rip), %rax
testl $bit_Slow_BSF, __cpu_features+FEATURE_OFFSET+index_Slow_BSF(%rip)
jz 2f
leaq __strnlen_sse2_no_bsf(%rip), %rax
2: ret
END(__strnlen)
# undef ENTRY
# define ENTRY(name) \
.type __strnlen_sse2, @function; \
.align 16; \
.globl __strnlen_sse2; \
.hidden __strnlen_sse2; \
__strnlen_sse2: cfi_startproc; \
CALL_MCOUNT
# undef END
# define END(name) \
cfi_endproc; .size __strnlen_sse2, .-__strnlen_sse2
# undef libc_hidden_def
# define libc_hidden_def(name) \
.globl __GI_strnlen; __GI_strnlen = __strnlen_sse2
#endif
#include "../strnlen.S"

263
sysdeps/x86_64/strlen.S
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@ -1,6 +1,5 @@
/* strlen(str) -- determine the length of the string STR.
Copyright (C) 2009-2013 Free Software Foundation, Inc.
Contributed by Ulrich Drepper <drepper@redhat.com>.
/* SSE2 version of strlen.
Copyright (C) 2012, 2013 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
@ -19,83 +18,217 @@
#include <sysdep.h>
/* Long lived register are
strlen(s), strnlen(s, n):
%xmm11 - zero
%rdi - s
%r10 (s+n) & (~(64-1))
%r11 s+n
*/
.text
ENTRY(strlen)
#define FIND_ZERO \
pcmpeqb (%rax), %xmm8; \
pcmpeqb 16(%rax), %xmm9; \
pcmpeqb 32(%rax), %xmm10; \
pcmpeqb 48(%rax), %xmm11; \
pmovmskb %xmm8, %esi; \
pmovmskb %xmm9, %edx; \
pmovmskb %xmm10, %r8d; \
pmovmskb %xmm11, %ecx; \
salq $16, %rdx; \
salq $16, %rcx; \
orq %rsi, %rdx; \
orq %r8, %rcx; \
salq $32, %rcx; \
orq %rcx, %rdx;
#ifdef AS_STRNLEN
/* Do not read anything when n==0. */
test %rsi, %rsi
jne L(n_nonzero)
xor %rax, %rax
mov %edi, %ecx
and $0x3f, %ecx
pxor %xmm0, %xmm0
cmp $0x30, %ecx
ret
L(n_nonzero):
/* Initialize long lived registers. */
add %rdi, %rsi
mov %rsi, %r10
and $-64, %r10
mov %rsi, %r11
#endif
pxor %xmm8, %xmm8
pxor %xmm9, %xmm9
pxor %xmm10, %xmm10
pxor %xmm11, %xmm11
movq %rdi, %rax
movq %rdi, %rcx
andq $4095, %rcx
/* Offsets 4032-4047 will be aligned into 4032 thus fit into page. */
cmpq $4047, %rcx
/* We cannot unify this branching as it would be ~6 cycles slower. */
ja L(next)
movdqu (%rdi), %xmm1
pcmpeqb %xmm1, %xmm0
pmovmskb %xmm0, %edx
#ifdef AS_STRNLEN
# define STRNLEN_PROLOG \
mov %r11, %rsi; \
subq %rax, %rsi; \
andq $-64, %rax; \
testq $-64, %rsi; \
je L(strnlen_ret)
#else
# define STRNLEN_PROLOG andq $-64, %rax;
#endif
#define PROLOG(lab) \
movq %rdi, %rcx; \
xorq %rax, %rcx; \
STRNLEN_PROLOG; \
sarq %cl, %rdx; \
test %rdx, %rdx; \
je L(lab); \
bsfq %rdx, %rax; \
ret
#ifdef AS_STRNLEN
andq $-16, %rax
FIND_ZERO
#else
movdqu (%rax), %xmm12
pcmpeqb %xmm8, %xmm12
pmovmskb %xmm12, %edx
test %edx, %edx
jnz L(exit_less16)
mov %rdi, %rax
and $-16, %rax
jmp L(align16_start)
je L(next48_bytes)
bsfq %rdx, %rax
ret
L(next48_bytes):
/* Same as FIND_ZERO except we do not check first 16 bytes. */
andq $-16, %rax
pcmpeqb 16(%rax), %xmm9;
pcmpeqb 32(%rax), %xmm10;
pcmpeqb 48(%rax), %xmm11;
pmovmskb %xmm9, %edx;
pmovmskb %xmm10, %r8d;
pmovmskb %xmm11, %ecx;
salq $16, %rdx;
salq $16, %rcx;
orq %r8, %rcx;
salq $32, %rcx;
orq %rcx, %rdx;
#endif
PROLOG(loop)
.p2align 4
L(next):
mov %rdi, %rax
and $-16, %rax
pcmpeqb (%rax), %xmm0
mov $-1, %esi
sub %rax, %rcx
shl %cl, %esi
pmovmskb %xmm0, %edx
and %esi, %edx
jnz L(exit)
L(align16_start):
pxor %xmm0, %xmm0
pxor %xmm1, %xmm1
pxor %xmm2, %xmm2
pxor %xmm3, %xmm3
andq $-64, %rax
FIND_ZERO
PROLOG(loop_init)
#ifdef AS_STRNLEN
/* We must do this check to correctly handle strnlen (s, -1). */
L(strnlen_ret):
bts %rsi, %rdx
sarq %cl, %rdx
test %rdx, %rdx
je L(loop_init)
bsfq %rdx, %rax
ret
#endif
.p2align 4
L(align16_loop):
pcmpeqb 16(%rax), %xmm0
pmovmskb %xmm0, %edx
test %edx, %edx
jnz L(exit16)
L(loop_init):
pxor %xmm9, %xmm9
pxor %xmm10, %xmm10
pxor %xmm11, %xmm11
#ifdef AS_STRNLEN
.p2align 4
L(loop):
pcmpeqb 32(%rax), %xmm1
pmovmskb %xmm1, %edx
test %edx, %edx
jnz L(exit32)
addq $64, %rax
cmpq %rax, %r10
je L(exit_end)
pcmpeqb 48(%rax), %xmm2
pmovmskb %xmm2, %edx
test %edx, %edx
jnz L(exit48)
movdqa (%rax), %xmm8
pminub 16(%rax), %xmm8
pminub 32(%rax), %xmm8
pminub 48(%rax), %xmm8
pcmpeqb %xmm11, %xmm8
pmovmskb %xmm8, %edx
testl %edx, %edx
jne L(exit)
jmp L(loop)
pcmpeqb 64(%rax), %xmm3
pmovmskb %xmm3, %edx
lea 64(%rax), %rax
test %edx, %edx
jz L(align16_loop)
.p2align 4
L(exit_end):
cmp %rax, %r11
je L(first)
pxor %xmm8, %xmm8
FIND_ZERO
L(first):
bts %r11, %rdx
bsfq %rdx, %rdx
addq %rdx, %rax
subq %rdi, %rax
ret
.p2align 4
L(exit):
sub %rdi, %rax
L(exit_less16):
bsf %rdx, %rdx
add %rdx, %rax
pxor %xmm8, %xmm8
FIND_ZERO
bsfq %rdx, %rdx
addq %rdx, %rax
subq %rdi, %rax
ret
#else
.p2align 4
L(exit16):
sub %rdi, %rax
bsf %rdx, %rdx
lea 16(%rdx,%rax), %rax
ret
L(loop):
movdqa 64(%rax), %xmm8
pminub 80(%rax), %xmm8
pminub 96(%rax), %xmm8
pminub 112(%rax), %xmm8
pcmpeqb %xmm11, %xmm8
pmovmskb %xmm8, %edx
testl %edx, %edx
jne L(exit64)
subq $-128, %rax
movdqa (%rax), %xmm8
pminub 16(%rax), %xmm8
pminub 32(%rax), %xmm8
pminub 48(%rax), %xmm8
pcmpeqb %xmm11, %xmm8
pmovmskb %xmm8, %edx
testl %edx, %edx
jne L(exit0)
jmp L(loop)
.p2align 4
L(exit32):
sub %rdi, %rax
bsf %rdx, %rdx
lea 32(%rdx,%rax), %rax
ret
.p2align 4
L(exit48):
sub %rdi, %rax
bsf %rdx, %rdx
lea 48(%rdx,%rax), %rax
L(exit64):
addq $64, %rax
L(exit0):
pxor %xmm8, %xmm8
FIND_ZERO
bsfq %rdx, %rdx
addq %rdx, %rax
subq %rdi, %rax
ret
#endif
END(strlen)
#ifndef AS_STRLEN
libc_hidden_builtin_def (strlen)
#endif

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sysdeps/x86_64/strnlen.S
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@ -1,63 +1,6 @@
/* strnlen(str,maxlen) -- determine the length of the string STR up to MAXLEN.
Copyright (C) 2010-2013 Free Software Foundation, Inc.
Contributed by Ulrich Drepper <drepper@redhat.com>.
This file is part of the GNU C Library.
#define AS_STRNLEN
#define strlen __strnlen
#include "strlen.S"
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
<http://www.gnu.org/licenses/>. */
#include <sysdep.h>
.text
ENTRY(__strnlen)
movq %rsi, %rax
testq %rsi, %rsi
jz 3f
pxor %xmm2, %xmm2
movq %rdi, %rcx
movq %rdi, %r8
movq $16, %r9
andq $~15, %rdi
movdqa %xmm2, %xmm1
pcmpeqb (%rdi), %xmm2
orl $0xffffffff, %r10d
subq %rdi, %rcx
shll %cl, %r10d
subq %rcx, %r9
pmovmskb %xmm2, %edx
andl %r10d, %edx
jnz 1f
subq %r9, %rsi
jbe 3f
2: movdqa 16(%rdi), %xmm0
leaq 16(%rdi), %rdi
pcmpeqb %xmm1, %xmm0
pmovmskb %xmm0, %edx
testl %edx, %edx
jnz 1f
subq $16, %rsi
jnbe 2b
3: ret
1: subq %r8, %rdi
bsfl %edx, %edx
addq %rdi, %rdx
cmpq %rdx, %rax
cmovnbq %rdx, %rax
ret
END(__strnlen)
weak_alias (__strnlen, strnlen)
libc_hidden_def (strnlen)
weak_alias (__strnlen, strnlen);
libc_hidden_builtin_def (strnlen)