diff options
Diffstat (limited to 'sysdeps/x86/isa-level.c')
| -rw-r--r-- | sysdeps/x86/isa-level.c | 97 |
1 files changed, 97 insertions, 0 deletions
diff --git a/sysdeps/x86/isa-level.c b/sysdeps/x86/isa-level.c new file mode 100644 index 0000000000..aaf524cb56 --- /dev/null +++ b/sysdeps/x86/isa-level.c @@ -0,0 +1,97 @@ +/* ELF program property for x86 ISA level. + Copyright (C) 2020 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. + + In addition to the permissions in the GNU Lesser General Public + License, the Free Software Foundation gives you unlimited + permission to link the compiled version of this file with other + programs, and to distribute those programs without any restriction + coming from the use of this file. (The Lesser General Public + License restrictions do apply in other respects; for example, they + cover modification of the file, and distribution when not linked + into another program.) + + 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 + <https://www.gnu.org/licenses/>. */ + +#include <elf.h> + +/* ELF program property for x86 ISA level. */ +#ifdef INCLUDE_X86_ISA_LEVEL +# if defined __x86_64__ || defined __FXSR__ || !defined _SOFT_FLOAT \ + || defined __MMX__ || defined __SSE__ || defined __SSE2__ +# define ISA_BASELINE GNU_PROPERTY_X86_ISA_1_BASELINE +# else +# define ISA_BASELINE 0 +# endif + +# if defined __GCC_HAVE_SYNC_COMPARE_AND_SWAP_16 \ + || (defined __x86_64__ && defined __LAHF_SAHF__) \ + || defined __POPCNT__ || defined __SSE3__ \ + || defined __SSSE3__ || defined __SSE4_1__ || defined __SSE4_2__ +# define ISA_V2 GNU_PROPERTY_X86_ISA_1_V2 +# else +# define ISA_V2 0 +# endif + +# if defined __AVX__ || defined __AVX2__ || defined __F16C__ \ + || defined __FMA__ || defined __LZCNT__ || defined __MOVBE__ \ + || defined __XSAVE__ +# define ISA_V3 GNU_PROPERTY_X86_ISA_1_V3 +# else +# define ISA_V3 0 +# endif + +# if defined __AVX512F__ || defined __AVX512BW__ || defined __AVX512CD__ \ + || defined __AVX512DQ__ || defined __AVX512VL__ +# define ISA_V4 GNU_PROPERTY_X86_ISA_1_V4 +# else +# define ISA_V4 0 +# endif + +# ifndef ISA_LEVEL +# define ISA_LEVEL (ISA_BASELINE | ISA_V2 | ISA_V3 | ISA_V4) +# endif + +# if ISA_LEVEL +# ifdef __LP64__ +# define PROPERTY_ALIGN 3 +# else +# define PROPERTY_ALIGN 2 +# endif + +# define note_stringify(arg) note_stringify_1(arg) +# define note_stringify_1(arg) #arg + +asm(".pushsection \".note.gnu.property\",\"a\",@note\n" +" .p2align " note_stringify (PROPERTY_ALIGN) + /* name length. */ +"\n .long 1f - 0f\n" + /* data length. */ +" .long 4f - 1f\n" + /* note type: NT_GNU_PROPERTY_TYPE_0. */ +" .long " note_stringify (NT_GNU_PROPERTY_TYPE_0) + /* vendor name. */ +"\n0: .asciz \"GNU\"\n" +"1: .p2align " note_stringify (PROPERTY_ALIGN) + /* pr_type: GNU_PROPERTY_X86_ISA_1_NEEDED. */ +"\n .long " note_stringify (GNU_PROPERTY_X86_ISA_1_NEEDED) + /* pr_datasz. */ +"\n .long 3f - 2f\n" + /* GNU_PROPERTY_X86_ISA_1_V[234]. */ +"2:\n .long " note_stringify (ISA_LEVEL) +"\n3:\n .p2align " note_stringify (PROPERTY_ALIGN) +"\n4:\n .popsection"); +# endif /* ISA_LEVEL */ +#endif /* INCLUDE_X86_ISA_LEVEL */ |