1 /* ELF program property for x86 ISA level. 2 Copyright (C) 2020 Free Software Foundation, Inc. 3 This file is part of the GNU C Library. 4 5 The GNU C Library is free software; you can redistribute it and/or 6 modify it under the terms of the GNU Lesser General Public 7 License as published by the Free Software Foundation; either 8 version 2.1 of the License, or (at your option) any later version. 9 10 In addition to the permissions in the GNU Lesser General Public 11 License, the Free Software Foundation gives you unlimited 12 permission to link the compiled version of this file with other 13 programs, and to distribute those programs without any restriction 14 coming from the use of this file. (The Lesser General Public 15 License restrictions do apply in other respects; for example, they 16 cover modification of the file, and distribution when not linked 17 into another program.) 18 19 The GNU C Library is distributed in the hope that it will be useful, 20 but WITHOUT ANY WARRANTY; without even the implied warranty of 21 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 22 Lesser General Public License for more details. 23 24 You should have received a copy of the GNU Lesser General Public 25 License along with the GNU C Library; if not, see 26 <https://www.gnu.org/licenses/>. */ 27 28 #include <elf.h> 29 30 /* ELF program property for x86 ISA level. */ 31 #ifdef INCLUDE_X86_ISA_LEVEL 32 # if defined __SSE__ && defined __SSE2__ 33 /* NB: ISAs, excluding MMX, in x86-64 ISA level baseline are used. */ 34 # define ISA_BASELINE GNU_PROPERTY_X86_ISA_1_BASELINE 35 # else 36 # define ISA_BASELINE 0 37 # endif 38 39 # if ISA_BASELINE && defined __GCC_HAVE_SYNC_COMPARE_AND_SWAP_16 \ 40 && defined HAVE_X86_LAHF_SAHF && defined __POPCNT__ \ 41 && defined __SSE3__ && defined __SSSE3__ && defined __SSE4_1__ \ 42 && defined __SSE4_2__ 43 /* NB: ISAs in x86-64 ISA level v2 are used. */ 44 # define ISA_V2 GNU_PROPERTY_X86_ISA_1_V2 45 # else 46 # define ISA_V2 0 47 # endif 48 49 # if ISA_V2 && defined __AVX__ && defined __AVX2__ && defined __F16C__ \ 50 && defined __FMA__ && defined __LZCNT__ && defined HAVE_X86_MOVBE 51 /* NB: ISAs in x86-64 ISA level v3 are used. */ 52 # define ISA_V3 GNU_PROPERTY_X86_ISA_1_V3 53 # else 54 # define ISA_V3 0 55 # endif 56 57 # if ISA_V3 && defined __AVX512F__ && defined __AVX512BW__ \ 58 && defined __AVX512CD__ && defined __AVX512DQ__ \ 59 && defined __AVX512VL__ 60 /* NB: ISAs in x86-64 ISA level v4 are used. */ 61 # define ISA_V4 GNU_PROPERTY_X86_ISA_1_V4 62 # else 63 # define ISA_V4 0 64 # endif 65 66 # ifndef ISA_LEVEL 67 # define ISA_LEVEL (ISA_BASELINE | ISA_V2 | ISA_V3 | ISA_V4) 68 # endif 69 70 # if ISA_LEVEL 71 # ifdef __LP64__ 72 # define PROPERTY_ALIGN 3 73 # else 74 # define PROPERTY_ALIGN 2 75 # endif 76 77 # define note_stringify(arg) note_stringify_1(arg) 78 # define note_stringify_1(arg) #arg 79 80 asm(".pushsection \".note.gnu.property\",\"a\",@note\n" 81 " .p2align " note_stringify (PROPERTY_ALIGN) 82 /* name length. */ 83 "\n .long 1f - 0f\n" 84 /* data length. */ 85 " .long 4f - 1f\n" 86 /* note type: NT_GNU_PROPERTY_TYPE_0. */ 87 " .long " note_stringify (NT_GNU_PROPERTY_TYPE_0) 88 /* vendor name. */ 89 "\n0: .asciz \"GNU\"\n" 90 "1: .p2align " note_stringify (PROPERTY_ALIGN) 91 /* pr_type: GNU_PROPERTY_X86_ISA_1_NEEDED. */ 92 "\n .long " note_stringify (GNU_PROPERTY_X86_ISA_1_NEEDED) 93 /* pr_datasz. */ 94 "\n .long 3f - 2f\n" 95 /* GNU_PROPERTY_X86_ISA_1_V[234]. */ 96 "2:\n .long " note_stringify (ISA_LEVEL) 97 "\n3:\n .p2align " note_stringify (PROPERTY_ALIGN) 98 "\n4:\n .popsection"); 99 # endif /* ISA_LEVEL */ 100 #endif /* INCLUDE_X86_ISA_LEVEL */ 101