mirror of
https://sourceware.org/git/glibc.git
synced 2024-11-22 13:00:06 +00:00
72276d6e88
Added AVX512 implementations of memcpy, mempcpy, memmove, memcpy_chk, mempcpy_chk, memmove_chk. It shows average improvement more than 30% over AVX versions on KNL hardware (performance results in the thread <https://sourceware.org/ml/libc-alpha/2016-01/msg00258.html>). * sysdeps/x86_64/multiarch/Makefile (sysdep_routines): Added new files. * sysdeps/x86_64/multiarch/ifunc-impl-list.c: Added new tests. * sysdeps/x86_64/multiarch/memcpy-avx512-no-vzeroupper.S: New file. * sysdeps/x86_64/multiarch/mempcpy-avx512-no-vzeroupper.S: Likewise. * sysdeps/x86_64/multiarch/memmove-avx512-no-vzeroupper.S: Likewise. * sysdeps/x86_64/multiarch/memcpy.S: Added new IFUNC branch. * sysdeps/x86_64/multiarch/memcpy_chk.S: Likewise. * sysdeps/x86_64/multiarch/memmove.c: Likewise. * sysdeps/x86_64/multiarch/memmove_chk.c: Likewise. * sysdeps/x86_64/multiarch/mempcpy.S: Likewise. * sysdeps/x86_64/multiarch/mempcpy_chk.S: Likewise.
87 lines
2.7 KiB
ArmAsm
87 lines
2.7 KiB
ArmAsm
/* Multiple versions of mempcpy
|
|
All versions must be listed in ifunc-impl-list.c.
|
|
Copyright (C) 2010-2016 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/>. */
|
|
|
|
#include <sysdep.h>
|
|
#include <init-arch.h>
|
|
|
|
/* Define multiple versions only for the definition in lib and for
|
|
DSO. In static binaries we need mempcpy before the initialization
|
|
happened. */
|
|
#if defined SHARED && IS_IN (libc)
|
|
ENTRY(__mempcpy)
|
|
.type __mempcpy, @gnu_indirect_function
|
|
LOAD_RTLD_GLOBAL_RO_RDX
|
|
#ifdef HAVE_AVX512_ASM_SUPPORT
|
|
HAS_ARCH_FEATURE (AVX512F_Usable)
|
|
jz 1f
|
|
HAS_ARCH_FEATURE (Prefer_No_VZEROUPPER)
|
|
jz 1f
|
|
leaq __mempcpy_avx512_no_vzeroupper(%rip), %rax
|
|
ret
|
|
#endif
|
|
1: leaq __mempcpy_sse2(%rip), %rax
|
|
HAS_CPU_FEATURE (SSSE3)
|
|
jz 2f
|
|
leaq __mempcpy_ssse3(%rip), %rax
|
|
HAS_ARCH_FEATURE (Fast_Copy_Backward)
|
|
jz 2f
|
|
leaq __mempcpy_ssse3_back(%rip), %rax
|
|
HAS_ARCH_FEATURE (AVX_Fast_Unaligned_Load)
|
|
jz 2f
|
|
leaq __mempcpy_avx_unaligned(%rip), %rax
|
|
2: ret
|
|
END(__mempcpy)
|
|
|
|
# undef ENTRY
|
|
# define ENTRY(name) \
|
|
.type __mempcpy_sse2, @function; \
|
|
.p2align 4; \
|
|
.globl __mempcpy_sse2; \
|
|
.hidden __mempcpy_sse2; \
|
|
__mempcpy_sse2: cfi_startproc; \
|
|
CALL_MCOUNT
|
|
# undef END
|
|
# define END(name) \
|
|
cfi_endproc; .size __mempcpy_sse2, .-__mempcpy_sse2
|
|
|
|
# undef ENTRY_CHK
|
|
# define ENTRY_CHK(name) \
|
|
.type __mempcpy_chk_sse2, @function; \
|
|
.globl __mempcpy_chk_sse2; \
|
|
.p2align 4; \
|
|
__mempcpy_chk_sse2: cfi_startproc; \
|
|
CALL_MCOUNT
|
|
# undef END_CHK
|
|
# define END_CHK(name) \
|
|
cfi_endproc; .size __mempcpy_chk_sse2, .-__mempcpy_chk_sse2
|
|
|
|
# undef libc_hidden_def
|
|
# undef libc_hidden_builtin_def
|
|
/* It doesn't make sense to send libc-internal mempcpy calls through a PLT.
|
|
The speedup we get from using SSSE3 instruction is likely eaten away
|
|
by the indirect call in the PLT. */
|
|
# define libc_hidden_def(name) \
|
|
.globl __GI_mempcpy; __GI_mempcpy = __mempcpy_sse2
|
|
# define libc_hidden_builtin_def(name) \
|
|
.globl __GI___mempcpy; __GI___mempcpy = __mempcpy_sse2
|
|
#endif
|
|
|
|
#include "../mempcpy.S"
|