diff options
Diffstat (limited to 'REORG.TODO/sysdeps/x86_64/multiarch/mempcpy.S')
| -rw-r--r-- | REORG.TODO/sysdeps/x86_64/multiarch/mempcpy.S | 73 |
1 files changed, 73 insertions, 0 deletions
diff --git a/REORG.TODO/sysdeps/x86_64/multiarch/mempcpy.S b/REORG.TODO/sysdeps/x86_64/multiarch/mempcpy.S new file mode 100644 index 0000000000..b8b2b28094 --- /dev/null +++ b/REORG.TODO/sysdeps/x86_64/multiarch/mempcpy.S @@ -0,0 +1,73 @@ +/* Multiple versions of mempcpy + All versions must be listed in ifunc-impl-list.c. + Copyright (C) 2010-2017 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) + .text +ENTRY(__mempcpy) + .type __mempcpy, @gnu_indirect_function + LOAD_RTLD_GLOBAL_RO_RDX + lea __mempcpy_erms(%rip), %RAX_LP + HAS_ARCH_FEATURE (Prefer_ERMS) + jnz 2f + HAS_ARCH_FEATURE (Prefer_No_AVX512) + jnz 1f + HAS_ARCH_FEATURE (AVX512F_Usable) + jz 1f + lea __mempcpy_avx512_no_vzeroupper(%rip), %RAX_LP + HAS_ARCH_FEATURE (Prefer_No_VZEROUPPER) + jnz 2f + lea __mempcpy_avx512_unaligned_erms(%rip), %RAX_LP + HAS_CPU_FEATURE (ERMS) + jnz 2f + lea __mempcpy_avx512_unaligned(%rip), %RAX_LP + ret +1: lea __mempcpy_avx_unaligned(%rip), %RAX_LP + HAS_ARCH_FEATURE (AVX_Fast_Unaligned_Load) + jz L(Fast_Unaligned_Load) + HAS_CPU_FEATURE (ERMS) + jz 2f + lea __mempcpy_avx_unaligned_erms(%rip), %RAX_LP + ret +L(Fast_Unaligned_Load): + lea __mempcpy_sse2_unaligned(%rip), %RAX_LP + HAS_ARCH_FEATURE (Fast_Unaligned_Copy) + jz L(SSSE3) + HAS_CPU_FEATURE (ERMS) + jz 2f + lea __mempcpy_sse2_unaligned_erms(%rip), %RAX_LP + ret +L(SSSE3): + HAS_CPU_FEATURE (SSSE3) + jz 2f + lea __mempcpy_ssse3_back(%rip), %RAX_LP + HAS_ARCH_FEATURE (Fast_Copy_Backward) + jnz 2f + lea __mempcpy_ssse3(%rip), %RAX_LP +2: ret +END(__mempcpy) + +weak_alias (__mempcpy, mempcpy) +#endif |