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author | H.J. Lu <hjl.tools@gmail.com> | 2016-06-08 13:57:50 -0700 |
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committer | H.J. Lu <hjl.tools@gmail.com> | 2016-06-08 13:58:08 -0700 |
commit | c867597bff2562180a18da4b8dba89d24e8b65c4 (patch) | |
tree | 3770c51728e718a0fffe569aca738749982b535a /sysdeps/x86_64/memmove.S | |
parent | 5e8c5bb1ac83aa2577d64d82467a653fa413f7ce (diff) | |
download | glibc-c867597bff2562180a18da4b8dba89d24e8b65c4.tar.gz glibc-c867597bff2562180a18da4b8dba89d24e8b65c4.tar.xz glibc-c867597bff2562180a18da4b8dba89d24e8b65c4.zip |
X86-64: Remove previous default/SSE2/AVX2 memcpy/memmove
Since the new SSE2/AVX2 memcpy/memmove are faster than the previous ones, we can remove the previous SSE2/AVX2 memcpy/memmove and replace them with the new ones. No change in IFUNC selection if SSE2 and AVX2 memcpy/memmove weren't used before. If SSE2 or AVX2 memcpy/memmove were used, the new SSE2 or AVX2 memcpy/memmove optimized with Enhanced REP MOVSB will be used for processors with ERMS. The new AVX512 memcpy/memmove will be used for processors with AVX512 which prefer vzeroupper. Since the new SSE2 memcpy/memmove are faster than the previous default memcpy/memmove used in libc.a and ld.so, we also remove the previous default memcpy/memmove and make them the default memcpy/memmove, except that non-temporal store isn't used in ld.so. Together, it reduces the size of libc.so by about 6 KB and the size of ld.so by about 2 KB. [BZ #19776] * sysdeps/x86_64/memcpy.S: Make it dummy. * sysdeps/x86_64/mempcpy.S: Likewise. * sysdeps/x86_64/memmove.S: New file. * sysdeps/x86_64/memmove_chk.S: Likewise. * sysdeps/x86_64/multiarch/memmove.S: Likewise. * sysdeps/x86_64/multiarch/memmove_chk.S: Likewise. * sysdeps/x86_64/memmove.c: Removed. * sysdeps/x86_64/multiarch/memcpy-avx-unaligned.S: Likewise. * sysdeps/x86_64/multiarch/memcpy-sse2-unaligned.S: Likewise. * sysdeps/x86_64/multiarch/memmove-avx-unaligned.S: Likewise. * sysdeps/x86_64/multiarch/memmove-sse2-unaligned-erms.S: Likewise. * sysdeps/x86_64/multiarch/memmove.c: Likewise. * sysdeps/x86_64/multiarch/memmove_chk.c: Likewise. * sysdeps/x86_64/multiarch/Makefile (sysdep_routines): Remove memcpy-sse2-unaligned, memmove-avx-unaligned, memcpy-avx-unaligned and memmove-sse2-unaligned-erms. * sysdeps/x86_64/multiarch/ifunc-impl-list.c (__libc_ifunc_impl_list): Replace __memmove_chk_avx512_unaligned_2 with __memmove_chk_avx512_unaligned. Remove __memmove_chk_avx_unaligned_2. Replace __memmove_chk_sse2_unaligned_2 with __memmove_chk_sse2_unaligned. Remove __memmove_chk_sse2 and __memmove_avx_unaligned_2. Replace __memmove_avx512_unaligned_2 with __memmove_avx512_unaligned. Replace __memmove_sse2_unaligned_2 with __memmove_sse2_unaligned. Remove __memmove_sse2. Replace __memcpy_chk_avx512_unaligned_2 with __memcpy_chk_avx512_unaligned. Remove __memcpy_chk_avx_unaligned_2. Replace __memcpy_chk_sse2_unaligned_2 with __memcpy_chk_sse2_unaligned. Remove __memcpy_chk_sse2. Remove __memcpy_avx_unaligned_2. Replace __memcpy_avx512_unaligned_2 with __memcpy_avx512_unaligned. Remove __memcpy_sse2_unaligned_2 and __memcpy_sse2. Replace __mempcpy_chk_avx512_unaligned_2 with __mempcpy_chk_avx512_unaligned. Remove __mempcpy_chk_avx_unaligned_2. Replace __mempcpy_chk_sse2_unaligned_2 with __mempcpy_chk_sse2_unaligned. Remove __mempcpy_chk_sse2. Replace __mempcpy_avx512_unaligned_2 with __mempcpy_avx512_unaligned. Remove __mempcpy_avx_unaligned_2. Replace __mempcpy_sse2_unaligned_2 with __mempcpy_sse2_unaligned. Remove __mempcpy_sse2. * sysdeps/x86_64/multiarch/memcpy.S (__new_memcpy): Support __memcpy_avx512_unaligned_erms and __memcpy_avx512_unaligned. Use __memcpy_avx_unaligned_erms and __memcpy_sse2_unaligned_erms if processor has ERMS. Default to __memcpy_sse2_unaligned. (ENTRY): Removed. (END): Likewise. (ENTRY_CHK): Likewise. (libc_hidden_builtin_def): Likewise. Don't include ../memcpy.S. * sysdeps/x86_64/multiarch/memcpy_chk.S (__memcpy_chk): Support __memcpy_chk_avx512_unaligned_erms and __memcpy_chk_avx512_unaligned. Use __memcpy_chk_avx_unaligned_erms and __memcpy_chk_sse2_unaligned_erms if if processor has ERMS. Default to __memcpy_chk_sse2_unaligned. * sysdeps/x86_64/multiarch/memmove-vec-unaligned-erms.S Change function suffix from unaligned_2 to unaligned. * sysdeps/x86_64/multiarch/mempcpy.S (__mempcpy): Support __mempcpy_avx512_unaligned_erms and __mempcpy_avx512_unaligned. Use __mempcpy_avx_unaligned_erms and __mempcpy_sse2_unaligned_erms if processor has ERMS. Default to __mempcpy_sse2_unaligned. (ENTRY): Removed. (END): Likewise. (ENTRY_CHK): Likewise. (libc_hidden_builtin_def): Likewise. Don't include ../mempcpy.S. (mempcpy): New. Add a weak alias. * sysdeps/x86_64/multiarch/mempcpy_chk.S (__mempcpy_chk): Support __mempcpy_chk_avx512_unaligned_erms and __mempcpy_chk_avx512_unaligned. Use __mempcpy_chk_avx_unaligned_erms and __mempcpy_chk_sse2_unaligned_erms if if processor has ERMS. Default to __mempcpy_chk_sse2_unaligned.
Diffstat (limited to 'sysdeps/x86_64/memmove.S')
-rw-r--r-- | sysdeps/x86_64/memmove.S | 71 |
1 files changed, 71 insertions, 0 deletions
diff --git a/sysdeps/x86_64/memmove.S b/sysdeps/x86_64/memmove.S new file mode 100644 index 0000000000..a7ae453791 --- /dev/null +++ b/sysdeps/x86_64/memmove.S @@ -0,0 +1,71 @@ +/* Optimized memmove for x86-64. + Copyright (C) 2016 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> + +#define VEC_SIZE 16 +#define VEC(i) xmm##i +#define PREFETCHNT prefetchnta +#define VMOVNT movntdq +/* Use movups and movaps for smaller code sizes. */ +#define VMOVU movups +#define VMOVA movaps + +#define SECTION(p) p + +#ifdef USE_MULTIARCH +# if !defined SHARED || !IS_IN (libc) +# define MEMCPY_SYMBOL(p,s) memcpy +# endif +#else +# if defined SHARED && IS_IN (libc) +# define MEMCPY_SYMBOL(p,s) __memcpy +# else +# define MEMCPY_SYMBOL(p,s) memcpy +# endif +#endif +#if !defined SHARED || !defined USE_MULTIARCH || !IS_IN (libc) +# define MEMPCPY_SYMBOL(p,s) __mempcpy +#endif +#ifndef MEMMOVE_SYMBOL +# define MEMMOVE_CHK_SYMBOL(p,s) p +# define MEMMOVE_SYMBOL(p,s) memmove +#endif + +#include "multiarch/memmove-vec-unaligned-erms.S" + +#ifndef USE_MULTIARCH +libc_hidden_builtin_def (memmove) +# if defined SHARED && IS_IN (libc) +strong_alias (memmove, __memcpy) +libc_hidden_ver (memmove, memcpy) +# endif +libc_hidden_def (__mempcpy) +weak_alias (__mempcpy, mempcpy) +libc_hidden_builtin_def (mempcpy) + +# if defined SHARED && IS_IN (libc) +# undef memcpy +# include <shlib-compat.h> +versioned_symbol (libc, __memcpy, memcpy, GLIBC_2_14); + +# if SHLIB_COMPAT (libc, GLIBC_2_2_5, GLIBC_2_14) +compat_symbol (libc, memmove, memcpy, GLIBC_2_2_5); +# endif +# endif +#endif |