mirror of
git://sourceware.org/git/glibc.git
synced 2025-04-12 14:21:18 +08:00
x86-64: Optimize memchr/rawmemchr/wmemchr with SSE2/AVX2
SSE2 memchr is extended to support wmemchr. AVX2 memchr/rawmemchr/wmemchr are added to search 32 bytes with a single vector compare instruction. AVX2 memchr/rawmemchr/wmemchr are as fast as SSE2 memchr/rawmemchr/wmemchr for small sizes and up to 1.5X faster for larger sizes on Haswell and Skylake. Select AVX2 memchr/rawmemchr/wmemchr on AVX2 machines where vzeroupper is preferred and AVX unaligned load is fast. NB: It uses TZCNT instead of BSF since TZCNT produces the same result as BSF for non-zero input. TZCNT is faster than BSF and is executed as BSF if machine doesn't support TZCNT. * sysdeps/x86_64/memchr.S (MEMCHR): New. Depending on if USE_AS_WMEMCHR is defined. (PCMPEQ): Likewise. (memchr): Renamed to ... (MEMCHR): This. Support wmemchr if USE_AS_WMEMCHR is defined. Replace pcmpeqb with PCMPEQ. * sysdeps/x86_64/multiarch/Makefile (sysdep_routines): Add memchr-sse2, rawmemchr-sse2, memchr-avx2, rawmemchr-avx2, wmemchr-sse4_1, wmemchr-avx2 and wmemchr-c. * sysdeps/x86_64/multiarch/ifunc-avx2.h: New file. * sysdeps/x86_64/multiarch/memchr-avx2.S: Likewise. * sysdeps/x86_64/multiarch/memchr-sse2.S: Likewise. * sysdeps/x86_64/multiarch/memchr.c: Likewise. * sysdeps/x86_64/multiarch/rawmemchr-avx2.S: Likewise. * sysdeps/x86_64/multiarch/rawmemchr-sse2.S: Likewise. * sysdeps/x86_64/multiarch/rawmemchr.c: Likewise. * sysdeps/x86_64/multiarch/wmemchr-avx2.S: Likewise. * sysdeps/x86_64/multiarch/wmemchr-sse2.S: Likewise. * sysdeps/x86_64/multiarch/wmemchr.c: Likewise. * sysdeps/x86_64/multiarch/ifunc-impl-list.c (__libc_ifunc_impl_list): Test __memchr_avx2, __memchr_sse2, __rawmemchr_avx2, __rawmemchr_sse2, __wmemchr_avx2 and __wmemchr_sse2.
This commit is contained in:
H.J. Lu
parent
990c32b93a
commit
2f5d20ac99
26
ChangeLog
26
ChangeLog
@ -1,3 +1,29 @@
|
||||
2017-06-09 H.J. Lu <hongjiu.lu@intel.com>
|
||||
|
||||
* sysdeps/x86_64/memchr.S (MEMCHR): New. Depending on if
|
||||
USE_AS_WMEMCHR is defined.
|
||||
(PCMPEQ): Likewise.
|
||||
(memchr): Renamed to ...
|
||||
(MEMCHR): This. Support wmemchr if USE_AS_WMEMCHR is defined.
|
||||
Replace pcmpeqb with PCMPEQ.
|
||||
* sysdeps/x86_64/multiarch/Makefile (sysdep_routines): Add
|
||||
memchr-sse2, rawmemchr-sse2, memchr-avx2, rawmemchr-avx2,
|
||||
wmemchr-sse4_1, wmemchr-avx2 and wmemchr-c.
|
||||
* sysdeps/x86_64/multiarch/ifunc-avx2.h: New file.
|
||||
* sysdeps/x86_64/multiarch/memchr-avx2.S: Likewise.
|
||||
* sysdeps/x86_64/multiarch/memchr-sse2.S: Likewise.
|
||||
* sysdeps/x86_64/multiarch/memchr.c: Likewise.
|
||||
* sysdeps/x86_64/multiarch/rawmemchr-avx2.S: Likewise.
|
||||
* sysdeps/x86_64/multiarch/rawmemchr-sse2.S: Likewise.
|
||||
* sysdeps/x86_64/multiarch/rawmemchr.c: Likewise.
|
||||
* sysdeps/x86_64/multiarch/wmemchr-avx2.S: Likewise.
|
||||
* sysdeps/x86_64/multiarch/wmemchr-sse2.S: Likewise.
|
||||
* sysdeps/x86_64/multiarch/wmemchr.c: Likewise.
|
||||
* sysdeps/x86_64/multiarch/ifunc-impl-list.c
|
||||
(__libc_ifunc_impl_list): Test __memchr_avx2, __memchr_sse2,
|
||||
__rawmemchr_avx2, __rawmemchr_sse2, __wmemchr_avx2 and
|
||||
__wmemchr_sse2.
|
||||
|
||||
2017-06-09 Florian Weimer <fweimer@redhat.com>
|
||||
|
||||
* malloc/Makefile (test-srcs): Remove tst-dynarray,
|
||||
|
||||
@ -18,17 +18,31 @@
|
||||
|
||||
#include <sysdep.h>
|
||||
|
||||
#ifdef USE_AS_WMEMCHR
|
||||
# define MEMCHR wmemchr
|
||||
# define PCMPEQ pcmpeqd
|
||||
#else
|
||||
# define MEMCHR memchr
|
||||
# define PCMPEQ pcmpeqb
|
||||
#endif
|
||||
|
||||
/* fast SSE2 version with using pmaxub and 64 byte loop */
|
||||
|
||||
.text
|
||||
ENTRY(memchr)
|
||||
ENTRY(MEMCHR)
|
||||
movd %esi, %xmm1
|
||||
mov %edi, %ecx
|
||||
|
||||
#ifdef USE_AS_WMEMCHR
|
||||
test %rdx, %rdx
|
||||
jz L(return_null)
|
||||
shl $2, %rdx
|
||||
#else
|
||||
punpcklbw %xmm1, %xmm1
|
||||
test %rdx, %rdx
|
||||
jz L(return_null)
|
||||
punpcklbw %xmm1, %xmm1
|
||||
#endif
|
||||
|
||||
and $63, %ecx
|
||||
pshufd $0, %xmm1, %xmm1
|
||||
@ -37,7 +51,7 @@ ENTRY(memchr)
|
||||
ja L(crosscache)
|
||||
|
||||
movdqu (%rdi), %xmm0
|
||||
pcmpeqb %xmm1, %xmm0
|
||||
PCMPEQ %xmm1, %xmm0
|
||||
pmovmskb %xmm0, %eax
|
||||
test %eax, %eax
|
||||
|
||||
@ -58,7 +72,7 @@ L(crosscache):
|
||||
and $-16, %rdi
|
||||
movdqa (%rdi), %xmm0
|
||||
|
||||
pcmpeqb %xmm1, %xmm0
|
||||
PCMPEQ %xmm1, %xmm0
|
||||
/* Check if there is a match. */
|
||||
pmovmskb %xmm0, %eax
|
||||
/* Remove the leading bytes. */
|
||||
@ -90,25 +104,25 @@ L(unaligned_no_match):
|
||||
.p2align 4
|
||||
L(loop_prolog):
|
||||
movdqa (%rdi), %xmm0
|
||||
pcmpeqb %xmm1, %xmm0
|
||||
PCMPEQ %xmm1, %xmm0
|
||||
pmovmskb %xmm0, %eax
|
||||
test %eax, %eax
|
||||
jnz L(matches)
|
||||
|
||||
movdqa 16(%rdi), %xmm2
|
||||
pcmpeqb %xmm1, %xmm2
|
||||
PCMPEQ %xmm1, %xmm2
|
||||
pmovmskb %xmm2, %eax
|
||||
test %eax, %eax
|
||||
jnz L(matches16)
|
||||
|
||||
movdqa 32(%rdi), %xmm3
|
||||
pcmpeqb %xmm1, %xmm3
|
||||
PCMPEQ %xmm1, %xmm3
|
||||
pmovmskb %xmm3, %eax
|
||||
test %eax, %eax
|
||||
jnz L(matches32)
|
||||
|
||||
movdqa 48(%rdi), %xmm4
|
||||
pcmpeqb %xmm1, %xmm4
|
||||
PCMPEQ %xmm1, %xmm4
|
||||
add $64, %rdi
|
||||
pmovmskb %xmm4, %eax
|
||||
test %eax, %eax
|
||||
@ -121,25 +135,25 @@ L(loop_prolog):
|
||||
jbe L(exit_loop)
|
||||
|
||||
movdqa (%rdi), %xmm0
|
||||
pcmpeqb %xmm1, %xmm0
|
||||
PCMPEQ %xmm1, %xmm0
|
||||
pmovmskb %xmm0, %eax
|
||||
test %eax, %eax
|
||||
jnz L(matches)
|
||||
|
||||
movdqa 16(%rdi), %xmm2
|
||||
pcmpeqb %xmm1, %xmm2
|
||||
PCMPEQ %xmm1, %xmm2
|
||||
pmovmskb %xmm2, %eax
|
||||
test %eax, %eax
|
||||
jnz L(matches16)
|
||||
|
||||
movdqa 32(%rdi), %xmm3
|
||||
pcmpeqb %xmm1, %xmm3
|
||||
PCMPEQ %xmm1, %xmm3
|
||||
pmovmskb %xmm3, %eax
|
||||
test %eax, %eax
|
||||
jnz L(matches32)
|
||||
|
||||
movdqa 48(%rdi), %xmm3
|
||||
pcmpeqb %xmm1, %xmm3
|
||||
PCMPEQ %xmm1, %xmm3
|
||||
pmovmskb %xmm3, %eax
|
||||
|
||||
add $64, %rdi
|
||||
@ -160,10 +174,10 @@ L(align64_loop):
|
||||
movdqa 32(%rdi), %xmm3
|
||||
movdqa 48(%rdi), %xmm4
|
||||
|
||||
pcmpeqb %xmm1, %xmm0
|
||||
pcmpeqb %xmm1, %xmm2
|
||||
pcmpeqb %xmm1, %xmm3
|
||||
pcmpeqb %xmm1, %xmm4
|
||||
PCMPEQ %xmm1, %xmm0
|
||||
PCMPEQ %xmm1, %xmm2
|
||||
PCMPEQ %xmm1, %xmm3
|
||||
PCMPEQ %xmm1, %xmm4
|
||||
|
||||
pmaxub %xmm0, %xmm3
|
||||
pmaxub %xmm2, %xmm4
|
||||
@ -186,9 +200,9 @@ L(align64_loop):
|
||||
jnz L(matches16)
|
||||
|
||||
movdqa 32(%rdi), %xmm3
|
||||
pcmpeqb %xmm1, %xmm3
|
||||
PCMPEQ %xmm1, %xmm3
|
||||
|
||||
pcmpeqb 48(%rdi), %xmm1
|
||||
PCMPEQ 48(%rdi), %xmm1
|
||||
pmovmskb %xmm3, %eax
|
||||
test %eax, %eax
|
||||
jnz L(matches32)
|
||||
@ -204,26 +218,26 @@ L(exit_loop):
|
||||
jle L(exit_loop_32)
|
||||
|
||||
movdqa (%rdi), %xmm0
|
||||
pcmpeqb %xmm1, %xmm0
|
||||
PCMPEQ %xmm1, %xmm0
|
||||
pmovmskb %xmm0, %eax
|
||||
test %eax, %eax
|
||||
jnz L(matches)
|
||||
|
||||
movdqa 16(%rdi), %xmm2
|
||||
pcmpeqb %xmm1, %xmm2
|
||||
PCMPEQ %xmm1, %xmm2
|
||||
pmovmskb %xmm2, %eax
|
||||
test %eax, %eax
|
||||
jnz L(matches16)
|
||||
|
||||
movdqa 32(%rdi), %xmm3
|
||||
pcmpeqb %xmm1, %xmm3
|
||||
PCMPEQ %xmm1, %xmm3
|
||||
pmovmskb %xmm3, %eax
|
||||
test %eax, %eax
|
||||
jnz L(matches32_1)
|
||||
sub $16, %edx
|
||||
jle L(return_null)
|
||||
|
||||
pcmpeqb 48(%rdi), %xmm1
|
||||
PCMPEQ 48(%rdi), %xmm1
|
||||
pmovmskb %xmm1, %eax
|
||||
test %eax, %eax
|
||||
jnz L(matches48_1)
|
||||
@ -234,14 +248,14 @@ L(exit_loop):
|
||||
L(exit_loop_32):
|
||||
add $32, %edx
|
||||
movdqa (%rdi), %xmm0
|
||||
pcmpeqb %xmm1, %xmm0
|
||||
PCMPEQ %xmm1, %xmm0
|
||||
pmovmskb %xmm0, %eax
|
||||
test %eax, %eax
|
||||
jnz L(matches_1)
|
||||
sub $16, %edx
|
||||
jbe L(return_null)
|
||||
|
||||
pcmpeqb 16(%rdi), %xmm1
|
||||
PCMPEQ 16(%rdi), %xmm1
|
||||
pmovmskb %xmm1, %eax
|
||||
test %eax, %eax
|
||||
jnz L(matches16_1)
|
||||
@ -308,8 +322,9 @@ L(matches48_1):
|
||||
L(return_null):
|
||||
xor %eax, %eax
|
||||
ret
|
||||
END(memchr)
|
||||
END(MEMCHR)
|
||||
|
||||
#ifndef USE_AS_WMEMCHR
|
||||
strong_alias (memchr, __memchr)
|
||||
|
||||
libc_hidden_builtin_def(memchr)
|
||||
#endif
|
||||
|
||||
@ -6,6 +6,7 @@ ifeq ($(subdir),string)
|
||||
|
||||
sysdep_routines += strncat-c stpncpy-c strncpy-c strcmp-ssse3 \
|
||||
strcmp-sse2-unaligned strncmp-ssse3 \
|
||||
memchr-sse2 rawmemchr-sse2 memchr-avx2 rawmemchr-avx2 \
|
||||
memcmp-avx2-movbe \
|
||||
memcmp-sse4 memcpy-ssse3 \
|
||||
memmove-ssse3 \
|
||||
@ -33,6 +34,7 @@ endif
|
||||
ifeq ($(subdir),wcsmbs)
|
||||
sysdep_routines += wmemcmp-sse4 wmemcmp-ssse3 wmemcmp-c \
|
||||
wmemcmp-avx2-movbe \
|
||||
wmemchr-sse2 wmemchr-avx2 \
|
||||
wcscpy-ssse3 wcscpy-c \
|
||||
wcsnlen-sse4_1 wcsnlen-c
|
||||
endif
|
||||
|
||||
36
sysdeps/x86_64/multiarch/ifunc-avx2.h
Normal file
36
sysdeps/x86_64/multiarch/ifunc-avx2.h
Normal file
@ -0,0 +1,36 @@
|
||||
/* Common definition for ifunc selections optimized with SSE2 and AVX2.
|
||||
All versions must be listed in ifunc-impl-list.c.
|
||||
Copyright (C) 2017 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 <init-arch.h>
|
||||
|
||||
extern __typeof (REDIRECT_NAME) OPTIMIZE (sse2) attribute_hidden;
|
||||
extern __typeof (REDIRECT_NAME) OPTIMIZE (avx2) attribute_hidden;
|
||||
|
||||
static inline void *
|
||||
IFUNC_SELECTOR (void)
|
||||
{
|
||||
const struct cpu_features* cpu_features = __get_cpu_features ();
|
||||
|
||||
if (!CPU_FEATURES_ARCH_P (cpu_features, Prefer_No_VZEROUPPER)
|
||||
&& CPU_FEATURES_ARCH_P (cpu_features, AVX2_Usable)
|
||||
&& CPU_FEATURES_ARCH_P (cpu_features, AVX_Fast_Unaligned_Load))
|
||||
return OPTIMIZE (avx2);
|
||||
|
||||
return OPTIMIZE (sse2);
|
||||
}
|
||||
@ -38,6 +38,13 @@ __libc_ifunc_impl_list (const char *name, struct libc_ifunc_impl *array,
|
||||
|
||||
size_t i = 0;
|
||||
|
||||
/* Support sysdeps/x86_64/multiarch/memchr.S. */
|
||||
IFUNC_IMPL (i, name, memchr,
|
||||
IFUNC_IMPL_ADD (array, i, memchr,
|
||||
HAS_ARCH_FEATURE (AVX2_Usable),
|
||||
__memchr_avx2)
|
||||
IFUNC_IMPL_ADD (array, i, memchr, 1, __memchr_sse2))
|
||||
|
||||
/* Support sysdeps/x86_64/multiarch/memcmp.S. */
|
||||
IFUNC_IMPL (i, name, memcmp,
|
||||
IFUNC_IMPL_ADD (array, i, memcmp,
|
||||
@ -152,6 +159,13 @@ __libc_ifunc_impl_list (const char *name, struct libc_ifunc_impl *array,
|
||||
__memset_avx512_no_vzeroupper)
|
||||
)
|
||||
|
||||
/* Support sysdeps/x86_64/multiarch/rawmemchr.S. */
|
||||
IFUNC_IMPL (i, name, rawmemchr,
|
||||
IFUNC_IMPL_ADD (array, i, rawmemchr,
|
||||
HAS_ARCH_FEATURE (AVX2_Usable),
|
||||
__rawmemchr_avx2)
|
||||
IFUNC_IMPL_ADD (array, i, rawmemchr, 1, __rawmemchr_sse2))
|
||||
|
||||
/* Support sysdeps/x86_64/multiarch/stpncpy.S. */
|
||||
IFUNC_IMPL (i, name, stpncpy,
|
||||
IFUNC_IMPL_ADD (array, i, stpncpy, HAS_CPU_FEATURE (SSSE3),
|
||||
@ -303,6 +317,13 @@ __libc_ifunc_impl_list (const char *name, struct libc_ifunc_impl *array,
|
||||
__wcsnlen_sse4_1)
|
||||
IFUNC_IMPL_ADD (array, i, wcsnlen, 1, __wcsnlen_sse2))
|
||||
|
||||
/* Support sysdeps/x86_64/multiarch/wmemchr.c. */
|
||||
IFUNC_IMPL (i, name, wmemchr,
|
||||
IFUNC_IMPL_ADD (array, i, wmemchr,
|
||||
HAS_ARCH_FEATURE (AVX2_Usable),
|
||||
__wmemchr_avx2)
|
||||
IFUNC_IMPL_ADD (array, i, wmemchr, 1, __wmemchr_sse2))
|
||||
|
||||
/* Support sysdeps/x86_64/multiarch/wmemcmp.S. */
|
||||
IFUNC_IMPL (i, name, wmemcmp,
|
||||
IFUNC_IMPL_ADD (array, i, wmemcmp,
|
||||
|
||||
340
sysdeps/x86_64/multiarch/memchr-avx2.S
Normal file
340
sysdeps/x86_64/multiarch/memchr-avx2.S
Normal file
@ -0,0 +1,340 @@
|
||||
/* memchr/wmemchr optimized with AVX2.
|
||||
Copyright (C) 2017 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/>. */
|
||||
|
||||
#if IS_IN (libc)
|
||||
|
||||
# include <sysdep.h>
|
||||
|
||||
# ifndef MEMCHR
|
||||
# define MEMCHR __memchr_avx2
|
||||
# endif
|
||||
|
||||
# ifdef USE_AS_WMEMCHR
|
||||
# define VPCMPEQ vpcmpeqd
|
||||
# else
|
||||
# define VPCMPEQ vpcmpeqb
|
||||
# endif
|
||||
|
||||
# ifndef VZEROUPPER
|
||||
# define VZEROUPPER vzeroupper
|
||||
# endif
|
||||
|
||||
# define VEC_SIZE 32
|
||||
|
||||
.section .text.avx,"ax",@progbits
|
||||
ENTRY (MEMCHR)
|
||||
# ifndef USE_AS_RAWMEMCHR
|
||||
/* Check for zero length. */
|
||||
testq %rdx, %rdx
|
||||
jz L(null)
|
||||
# endif
|
||||
movl %edi, %ecx
|
||||
/* Broadcast CHAR to YMM0. */
|
||||
vmovd %esi, %xmm0
|
||||
# ifdef USE_AS_WMEMCHR
|
||||
shl $2, %rdx
|
||||
vpbroadcastd %xmm0, %ymm0
|
||||
# else
|
||||
vpbroadcastb %xmm0, %ymm0
|
||||
# endif
|
||||
/* Check if we may cross page boundary with one vector load. */
|
||||
andl $(2 * VEC_SIZE - 1), %ecx
|
||||
cmpl $VEC_SIZE, %ecx
|
||||
ja L(cros_page_boundary)
|
||||
|
||||
/* Check the first VEC_SIZE bytes. */
|
||||
VPCMPEQ (%rdi), %ymm0, %ymm1
|
||||
vpmovmskb %ymm1, %eax
|
||||
testl %eax, %eax
|
||||
|
||||
# ifndef USE_AS_RAWMEMCHR
|
||||
jnz L(first_vec_x0_check)
|
||||
/* Adjust length and check the end of data. */
|
||||
subq $VEC_SIZE, %rdx
|
||||
jbe L(zero)
|
||||
# else
|
||||
jnz L(first_vec_x0)
|
||||
# endif
|
||||
|
||||
/* Align data for aligned loads in the loop. */
|
||||
addq $VEC_SIZE, %rdi
|
||||
andl $(VEC_SIZE - 1), %ecx
|
||||
andq $-VEC_SIZE, %rdi
|
||||
|
||||
# ifndef USE_AS_RAWMEMCHR
|
||||
/* Adjust length. */
|
||||
addq %rcx, %rdx
|
||||
|
||||
subq $(VEC_SIZE * 4), %rdx
|
||||
jbe L(last_4x_vec_or_less)
|
||||
# endif
|
||||
jmp L(more_4x_vec)
|
||||
|
||||
.p2align 4
|
||||
L(cros_page_boundary):
|
||||
andl $(VEC_SIZE - 1), %ecx
|
||||
andq $-VEC_SIZE, %rdi
|
||||
VPCMPEQ (%rdi), %ymm0, %ymm1
|
||||
vpmovmskb %ymm1, %eax
|
||||
/* Remove the leading bytes. */
|
||||
sarl %cl, %eax
|
||||
testl %eax, %eax
|
||||
jz L(aligned_more)
|
||||
tzcntl %eax, %eax
|
||||
# ifndef USE_AS_RAWMEMCHR
|
||||
/* Check the end of data. */
|
||||
cmpq %rax, %rdx
|
||||
jbe L(zero)
|
||||
# endif
|
||||
addq %rdi, %rax
|
||||
addq %rcx, %rax
|
||||
VZEROUPPER
|
||||
ret
|
||||
|
||||
.p2align 4
|
||||
L(aligned_more):
|
||||
# ifndef USE_AS_RAWMEMCHR
|
||||
/* Calculate "rdx + rcx - VEC_SIZE" with "rdx - (VEC_SIZE - rcx)"
|
||||
instead of "(rdx + rcx) - VEC_SIZE" to void possible addition
|
||||
overflow. */
|
||||
negq %rcx
|
||||
addq $VEC_SIZE, %rcx
|
||||
|
||||
/* Check the end of data. */
|
||||
subq %rcx, %rdx
|
||||
jbe L(zero)
|
||||
# endif
|
||||
|
||||
addq $VEC_SIZE, %rdi
|
||||
|
||||
# ifndef USE_AS_RAWMEMCHR
|
||||
subq $(VEC_SIZE * 4), %rdx
|
||||
jbe L(last_4x_vec_or_less)
|
||||
# endif
|
||||
|
||||
L(more_4x_vec):
|
||||
/* Check the first 4 * VEC_SIZE. Only one VEC_SIZE at a time
|
||||
since data is only aligned to VEC_SIZE. */
|
||||
VPCMPEQ (%rdi), %ymm0, %ymm1
|
||||
vpmovmskb %ymm1, %eax
|
||||
testl %eax, %eax
|
||||
jnz L(first_vec_x0)
|
||||
|
||||
VPCMPEQ VEC_SIZE(%rdi), %ymm0, %ymm1
|
||||
vpmovmskb %ymm1, %eax
|
||||
testl %eax, %eax
|
||||
jnz L(first_vec_x1)
|
||||
|
||||
VPCMPEQ (VEC_SIZE * 2)(%rdi), %ymm0, %ymm1
|
||||
vpmovmskb %ymm1, %eax
|
||||
testl %eax, %eax
|
||||
jnz L(first_vec_x2)
|
||||
|
||||
VPCMPEQ (VEC_SIZE * 3)(%rdi), %ymm0, %ymm1
|
||||
vpmovmskb %ymm1, %eax
|
||||
testl %eax, %eax
|
||||
jnz L(first_vec_x3)
|
||||
|
||||
addq $(VEC_SIZE * 4), %rdi
|
||||
|
||||
# ifndef USE_AS_RAWMEMCHR
|
||||
subq $(VEC_SIZE * 4), %rdx
|
||||
jbe L(last_4x_vec_or_less)
|
||||
# endif
|
||||
|
||||
/* Align data to 4 * VEC_SIZE. */
|
||||
movq %rdi, %rcx
|
||||
andl $(4 * VEC_SIZE - 1), %ecx
|
||||
andq $-(4 * VEC_SIZE), %rdi
|
||||
|
||||
# ifndef USE_AS_RAWMEMCHR
|
||||
/* Adjust length. */
|
||||
addq %rcx, %rdx
|
||||
# endif
|
||||
|
||||
.p2align 4
|
||||
L(loop_4x_vec):
|
||||
/* Compare 4 * VEC at a time forward. */
|
||||
VPCMPEQ (%rdi), %ymm0, %ymm1
|
||||
VPCMPEQ VEC_SIZE(%rdi), %ymm0, %ymm2
|
||||
VPCMPEQ (VEC_SIZE * 2)(%rdi), %ymm0, %ymm3
|
||||
VPCMPEQ (VEC_SIZE * 3)(%rdi), %ymm0, %ymm4
|
||||
|
||||
vpor %ymm1, %ymm2, %ymm5
|
||||
vpor %ymm3, %ymm4, %ymm6
|
||||
vpor %ymm5, %ymm6, %ymm5
|
||||
|
||||
vpmovmskb %ymm5, %eax
|
||||
testl %eax, %eax
|
||||
jnz L(4x_vec_end)
|
||||
|
||||
addq $(VEC_SIZE * 4), %rdi
|
||||
|
||||
# ifdef USE_AS_RAWMEMCHR
|
||||
jmp L(loop_4x_vec)
|
||||
# else
|
||||
subq $(VEC_SIZE * 4), %rdx
|
||||
ja L(loop_4x_vec)
|
||||
|
||||
L(last_4x_vec_or_less):
|
||||
/* Less than 4 * VEC and aligned to VEC_SIZE. */
|
||||
addl $(VEC_SIZE * 2), %edx
|
||||
jle L(last_2x_vec)
|
||||
|
||||
VPCMPEQ (%rdi), %ymm0, %ymm1
|
||||
vpmovmskb %ymm1, %eax
|
||||
testl %eax, %eax
|
||||
jnz L(first_vec_x0)
|
||||
|
||||
VPCMPEQ VEC_SIZE(%rdi), %ymm0, %ymm1
|
||||
vpmovmskb %ymm1, %eax
|
||||
testl %eax, %eax
|
||||
jnz L(first_vec_x1)
|
||||
|
||||
VPCMPEQ (VEC_SIZE * 2)(%rdi), %ymm0, %ymm1
|
||||
vpmovmskb %ymm1, %eax
|
||||
testl %eax, %eax
|
||||
|
||||
jnz L(first_vec_x2_check)
|
||||
subl $VEC_SIZE, %edx
|
||||
jle L(zero)
|
||||
|
||||
VPCMPEQ (VEC_SIZE * 3)(%rdi), %ymm0, %ymm1
|
||||
vpmovmskb %ymm1, %eax
|
||||
testl %eax, %eax
|
||||
|
||||
jnz L(first_vec_x3_check)
|
||||
xorl %eax, %eax
|
||||
VZEROUPPER
|
||||
ret
|
||||
|
||||
.p2align 4
|
||||
L(last_2x_vec):
|
||||
addl $(VEC_SIZE * 2), %edx
|
||||
VPCMPEQ (%rdi), %ymm0, %ymm1
|
||||
vpmovmskb %ymm1, %eax
|
||||
testl %eax, %eax
|
||||
|
||||
jnz L(first_vec_x0_check)
|
||||
subl $VEC_SIZE, %edx
|
||||
jle L(zero)
|
||||
|
||||
VPCMPEQ VEC_SIZE(%rdi), %ymm0, %ymm1
|
||||
vpmovmskb %ymm1, %eax
|
||||
testl %eax, %eax
|
||||
jnz L(first_vec_x1_check)
|
||||
xorl %eax, %eax
|
||||
VZEROUPPER
|
||||
ret
|
||||
|
||||
.p2align 4
|
||||
L(first_vec_x0_check):
|
||||
tzcntl %eax, %eax
|
||||
/* Check the end of data. */
|
||||
cmpq %rax, %rdx
|
||||
jbe L(zero)
|
||||
addq %rdi, %rax
|
||||
VZEROUPPER
|
||||
ret
|
||||
|
||||
.p2align 4
|
||||
L(first_vec_x1_check):
|
||||
tzcntl %eax, %eax
|
||||
/* Check the end of data. */
|
||||
cmpq %rax, %rdx
|
||||
jbe L(zero)
|
||||
addq $VEC_SIZE, %rax
|
||||
addq %rdi, %rax
|
||||
VZEROUPPER
|
||||
ret
|
||||
|
||||
.p2align 4
|
||||
L(first_vec_x2_check):
|
||||
tzcntl %eax, %eax
|
||||
/* Check the end of data. */
|
||||
cmpq %rax, %rdx
|
||||
jbe L(zero)
|
||||
addq $(VEC_SIZE * 2), %rax
|
||||
addq %rdi, %rax
|
||||
VZEROUPPER
|
||||
ret
|
||||
|
||||
.p2align 4
|
||||
L(first_vec_x3_check):
|
||||
tzcntl %eax, %eax
|
||||
/* Check the end of data. */
|
||||
cmpq %rax, %rdx
|
||||
jbe L(zero)
|
||||
addq $(VEC_SIZE * 3), %rax
|
||||
addq %rdi, %rax
|
||||
VZEROUPPER
|
||||
ret
|
||||
|
||||
.p2align 4
|
||||
L(zero):
|
||||
VZEROUPPER
|
||||
L(null):
|
||||
xorl %eax, %eax
|
||||
ret
|
||||
# endif
|
||||
|
||||
.p2align 4
|
||||
L(first_vec_x0):
|
||||
tzcntl %eax, %eax
|
||||
addq %rdi, %rax
|
||||
VZEROUPPER
|
||||
ret
|
||||
|
||||
.p2align 4
|
||||
L(first_vec_x1):
|
||||
tzcntl %eax, %eax
|
||||
addq $VEC_SIZE, %rax
|
||||
addq %rdi, %rax
|
||||
VZEROUPPER
|
||||
ret
|
||||
|
||||
.p2align 4
|
||||
L(first_vec_x2):
|
||||
tzcntl %eax, %eax
|
||||
addq $(VEC_SIZE * 2), %rax
|
||||
addq %rdi, %rax
|
||||
VZEROUPPER
|
||||
ret
|
||||
|
||||
.p2align 4
|
||||
L(4x_vec_end):
|
||||
vpmovmskb %ymm1, %eax
|
||||
testl %eax, %eax
|
||||
jnz L(first_vec_x0)
|
||||
vpmovmskb %ymm2, %eax
|
||||
testl %eax, %eax
|
||||
jnz L(first_vec_x1)
|
||||
vpmovmskb %ymm3, %eax
|
||||
testl %eax, %eax
|
||||
jnz L(first_vec_x2)
|
||||
vpmovmskb %ymm4, %eax
|
||||
testl %eax, %eax
|
||||
L(first_vec_x3):
|
||||
tzcntl %eax, %eax
|
||||
addq $(VEC_SIZE * 3), %rax
|
||||
addq %rdi, %rax
|
||||
VZEROUPPER
|
||||
ret
|
||||
|
||||
END (MEMCHR)
|
||||
#endif
|
||||
28
sysdeps/x86_64/multiarch/memchr-sse2.S
Normal file
28
sysdeps/x86_64/multiarch/memchr-sse2.S
Normal file
@ -0,0 +1,28 @@
|
||||
/* memchr optimized with SSE2.
|
||||
Copyright (C) 2017 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/>. */
|
||||
|
||||
#if IS_IN (libc)
|
||||
# define memchr __memchr_sse2
|
||||
|
||||
# undef strong_alias
|
||||
# define strong_alias(memchr, __memchr)
|
||||
# undef libc_hidden_builtin_def
|
||||
# define libc_hidden_builtin_def(memchr)
|
||||
#endif
|
||||
|
||||
#include "../memchr.S"
|
||||
35
sysdeps/x86_64/multiarch/memchr.c
Normal file
35
sysdeps/x86_64/multiarch/memchr.c
Normal file
@ -0,0 +1,35 @@
|
||||
/* Multiple versions of memchr
|
||||
All versions must be listed in ifunc-impl-list.c.
|
||||
Copyright (C) 2017 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/>. */
|
||||
|
||||
/* Define multiple versions only for the definition in libc. */
|
||||
#if IS_IN (libc)
|
||||
# define memchr __redirect_memchr
|
||||
# include <string.h>
|
||||
# undef memchr
|
||||
|
||||
# define SYMBOL_NAME memchr
|
||||
# include "ifunc-avx2.h"
|
||||
|
||||
libc_ifunc_redirected (__redirect_memchr, memchr, IFUNC_SELECTOR ());
|
||||
strong_alias (memchr, __memchr)
|
||||
# ifdef SHARED
|
||||
__hidden_ver1 (memchr, __GI_memchr, __redirect_memchr)
|
||||
__attribute__((visibility ("hidden")));
|
||||
# endif
|
||||
#endif
|
||||
4
sysdeps/x86_64/multiarch/rawmemchr-avx2.S
Normal file
4
sysdeps/x86_64/multiarch/rawmemchr-avx2.S
Normal file
@ -0,0 +1,4 @@
|
||||
#define MEMCHR __rawmemchr_avx2
|
||||
#define USE_AS_RAWMEMCHR 1
|
||||
|
||||
#include "memchr-avx2.S"
|
||||
29
sysdeps/x86_64/multiarch/rawmemchr-sse2.S
Normal file
29
sysdeps/x86_64/multiarch/rawmemchr-sse2.S
Normal file
@ -0,0 +1,29 @@
|
||||
/* rawmemchr optimized with SSE2.
|
||||
Copyright (C) 2017 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/>. */
|
||||
|
||||
/* Define multiple versions only for the definition in libc. */
|
||||
#if IS_IN (libc)
|
||||
# define __rawmemchr __rawmemchr_sse2
|
||||
|
||||
# undefine weak_alias
|
||||
# define weak_alias(__rawmemchr, rawmemchr)
|
||||
# undef libc_hidden_def
|
||||
# define libc_hidden_def(__rawmemchr)
|
||||
#endif
|
||||
|
||||
#include "../rawmemchr.S"
|
||||
38
sysdeps/x86_64/multiarch/rawmemchr.c
Normal file
38
sysdeps/x86_64/multiarch/rawmemchr.c
Normal file
@ -0,0 +1,38 @@
|
||||
/* Multiple versions of rawmemchr
|
||||
All versions must be listed in ifunc-impl-list.c.
|
||||
Copyright (C) 2017 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/>. */
|
||||
|
||||
/* Define multiple versions only for the definition in libc. */
|
||||
#if IS_IN (libc)
|
||||
# define rawmemchr __redirect_rawmemchr
|
||||
# define __rawmemchr __redirect___rawmemchr
|
||||
# include <string.h>
|
||||
# undef rawmemchr
|
||||
# undef __rawmemchr
|
||||
|
||||
# define SYMBOL_NAME rawmemchr
|
||||
# include "ifunc-avx2.h"
|
||||
|
||||
libc_ifunc_redirected (__redirect_rawmemchr, __rawmemchr,
|
||||
IFUNC_SELECTOR ());
|
||||
weak_alias (__rawmemchr, rawmemchr)
|
||||
# ifdef SHARED
|
||||
__hidden_ver1 (__rawmemchr, __GI___rawmemchr, __redirect___rawmemchr)
|
||||
__attribute__((visibility ("hidden")));
|
||||
# endif
|
||||
#endif
|
||||
4
sysdeps/x86_64/multiarch/wmemchr-avx2.S
Normal file
4
sysdeps/x86_64/multiarch/wmemchr-avx2.S
Normal file
@ -0,0 +1,4 @@
|
||||
#define MEMCHR __wmemchr_avx2
|
||||
#define USE_AS_WMEMCHR 1
|
||||
|
||||
#include "memchr-avx2.S"
|
||||
4
sysdeps/x86_64/multiarch/wmemchr-sse2.S
Normal file
4
sysdeps/x86_64/multiarch/wmemchr-sse2.S
Normal file
@ -0,0 +1,4 @@
|
||||
#define USE_AS_WMEMCHR 1
|
||||
#define wmemchr __wmemchr_sse2
|
||||
|
||||
#include "../memchr.S"
|
||||
39
sysdeps/x86_64/multiarch/wmemchr.c
Normal file
39
sysdeps/x86_64/multiarch/wmemchr.c
Normal file
@ -0,0 +1,39 @@
|
||||
/* Multiple versions of wmemchr
|
||||
All versions must be listed in ifunc-impl-list.c.
|
||||
Copyright (C) 2017 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/>. */
|
||||
|
||||
/* Define multiple versions only for the definition in libc. */
|
||||
#if IS_IN (libc)
|
||||
# define wmemchr __redirect_wmemchr
|
||||
# define __wmemchr __redirect___wmemchr
|
||||
# include <wchar.h>
|
||||
# undef wmemchr
|
||||
# undef __wmemchr
|
||||
|
||||
# define SYMBOL_NAME wmemchr
|
||||
# include "ifunc-avx2.h"
|
||||
|
||||
libc_ifunc_redirected (__redirect_wmemchr, __wmemchr, IFUNC_SELECTOR ());
|
||||
weak_alias (__wmemchr, wmemchr)
|
||||
# ifdef SHARED
|
||||
__hidden_ver1 (__wmemchr, __GI___wmemchr, __redirect___wmemchr)
|
||||
__attribute__((visibility ("hidden")));
|
||||
__hidden_ver1 (wmemchr, __GI_wmemchr, __redirect_wmemchr)
|
||||
__attribute__((weak, visibility ("hidden")));
|
||||
# endif
|
||||
#endif
|
||||
Loading…
x
Reference in New Issue
Block a user