AuroraMiddleware/glibc
1
0
Fork 0
mirror of https://sourceware.org/git/glibc.git synced 2024-12-25 04:01:10 +00:00
Code Issues Packages Projects Releases Wiki Activity
e4933c8a92
glibc/sysdeps/x86/tst-cpu-features-supports.c

199 lines
6.2 KiB
C
Raw Normal View History

x86: Install <sys/platform/x86.h> [BZ #26124] Install <sys/platform/x86.h> so that programmers can do #if __has_include(<sys/platform/x86.h>) #include <sys/platform/x86.h> #endif ... if (CPU_FEATURE_USABLE (SSE2)) ... if (CPU_FEATURE_USABLE (AVX2)) ... <sys/platform/x86.h> exports only: enum { COMMON_CPUID_INDEX_1 = 0, COMMON_CPUID_INDEX_7, COMMON_CPUID_INDEX_80000001, COMMON_CPUID_INDEX_D_ECX_1, COMMON_CPUID_INDEX_80000007, COMMON_CPUID_INDEX_80000008, COMMON_CPUID_INDEX_7_ECX_1, /* Keep the following line at the end. */ COMMON_CPUID_INDEX_MAX }; struct cpuid_features { struct cpuid_registers cpuid; struct cpuid_registers usable; }; struct cpu_features { struct cpu_features_basic basic; struct cpuid_features features[COMMON_CPUID_INDEX_MAX]; }; /* Get a pointer to the CPU features structure. */ extern const struct cpu_features *__x86_get_cpu_features (unsigned int max) __attribute__ ((const)); Since all feature checks are done through macros, programs compiled with a newer <sys/platform/x86.h> are compatible with the older glibc binaries as long as the layout of struct cpu_features is identical. The features array can be expanded with backward binary compatibility for both .o and .so files. When COMMON_CPUID_INDEX_MAX is increased to support new processor features, __x86_get_cpu_features in the older glibc binaries returns NULL and HAS_CPU_FEATURE/CPU_FEATURE_USABLE return false on the new processor feature. No new symbol version is neeeded. Both CPU_FEATURE_USABLE and HAS_CPU_FEATURE are provided. HAS_CPU_FEATURE can be used to identify processor features. Note: Although GCC has __builtin_cpu_supports, it only supports a subset of <sys/platform/x86.h> and it is equivalent to CPU_FEATURE_USABLE. It doesn't support HAS_CPU_FEATURE.
2020-06-30 01:30:54 +00:00
/* Test CPU feature data against __builtin_cpu_supports.
This file is part of the GNU C Library.
Update copyright dates with scripts/update-copyrights I used these shell commands: ../glibc/scripts/update-copyrights $PWD/../gnulib/build-aux/update-copyright (cd ../glibc && git commit -am"[this commit message]") and then ignored the output, which consisted lines saying "FOO: warning: copyright statement not found" for each of 6694 files FOO. I then removed trailing white space from benchtests/bench-pthread-locks.c and iconvdata/tst-iconv-big5-hkscs-to-2ucs4.c, to work around this diagnostic from Savannah: remote: *** pre-commit check failed ... remote: *** error: lines with trailing whitespace found remote: error: hook declined to update refs/heads/master
2021-01-02 19:32:25 +00:00
Copyright (C) 2020-2021 Free Software Foundation, Inc.
x86: Install <sys/platform/x86.h> [BZ #26124] Install <sys/platform/x86.h> so that programmers can do #if __has_include(<sys/platform/x86.h>) #include <sys/platform/x86.h> #endif ... if (CPU_FEATURE_USABLE (SSE2)) ... if (CPU_FEATURE_USABLE (AVX2)) ... <sys/platform/x86.h> exports only: enum { COMMON_CPUID_INDEX_1 = 0, COMMON_CPUID_INDEX_7, COMMON_CPUID_INDEX_80000001, COMMON_CPUID_INDEX_D_ECX_1, COMMON_CPUID_INDEX_80000007, COMMON_CPUID_INDEX_80000008, COMMON_CPUID_INDEX_7_ECX_1, /* Keep the following line at the end. */ COMMON_CPUID_INDEX_MAX }; struct cpuid_features { struct cpuid_registers cpuid; struct cpuid_registers usable; }; struct cpu_features { struct cpu_features_basic basic; struct cpuid_features features[COMMON_CPUID_INDEX_MAX]; }; /* Get a pointer to the CPU features structure. */ extern const struct cpu_features *__x86_get_cpu_features (unsigned int max) __attribute__ ((const)); Since all feature checks are done through macros, programs compiled with a newer <sys/platform/x86.h> are compatible with the older glibc binaries as long as the layout of struct cpu_features is identical. The features array can be expanded with backward binary compatibility for both .o and .so files. When COMMON_CPUID_INDEX_MAX is increased to support new processor features, __x86_get_cpu_features in the older glibc binaries returns NULL and HAS_CPU_FEATURE/CPU_FEATURE_USABLE return false on the new processor feature. No new symbol version is neeeded. Both CPU_FEATURE_USABLE and HAS_CPU_FEATURE are provided. HAS_CPU_FEATURE can be used to identify processor features. Note: Although GCC has __builtin_cpu_supports, it only supports a subset of <sys/platform/x86.h> and it is equivalent to CPU_FEATURE_USABLE. It doesn't support HAS_CPU_FEATURE.
2020-06-30 01:30:54 +00:00
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
<https://www.gnu.org/licenses/>. */
#include <sys/platform/x86.h>
#include <stdio.h>
int
check_supports (int supports, int usable, const char *supports_name,
const char *name)
{
printf ("Checking %s:\n", name);
printf (" %s: %d\n", name, usable);
printf (" __builtin_cpu_supports (%s): %d\n",
supports_name, supports);
if ((supports != 0) != (usable != 0))
{
printf (" *** failure ***\n");
return 1;
}
return 0;
}
#define CHECK_SUPPORTS(str, name) \
check_supports (__builtin_cpu_supports (#str), \
CPU_FEATURE_USABLE (name), \
x86: Adjust tst-cpu-features-supports.c for GCC 11 Check HAS_CPU_FEATURE instead of CPU_FEATURE_USABLE for FSGSBASE, IBT, LM, SHSTK and XSAVES since FSGSBASE requires kernel support, IBT/SHSTK/LM require OS support and XSAVES is supervisor-mode only.
2020-12-03 23:02:44 +00:00
#str, "CPU_FEATURE_USABLE (" #name ")");
#define CHECK_CPU_SUPPORTS(str, name) \
check_supports (__builtin_cpu_supports (#str), \
HAS_CPU_FEATURE (name), \
x86: Install <sys/platform/x86.h> [BZ #26124] Install <sys/platform/x86.h> so that programmers can do #if __has_include(<sys/platform/x86.h>) #include <sys/platform/x86.h> #endif ... if (CPU_FEATURE_USABLE (SSE2)) ... if (CPU_FEATURE_USABLE (AVX2)) ... <sys/platform/x86.h> exports only: enum { COMMON_CPUID_INDEX_1 = 0, COMMON_CPUID_INDEX_7, COMMON_CPUID_INDEX_80000001, COMMON_CPUID_INDEX_D_ECX_1, COMMON_CPUID_INDEX_80000007, COMMON_CPUID_INDEX_80000008, COMMON_CPUID_INDEX_7_ECX_1, /* Keep the following line at the end. */ COMMON_CPUID_INDEX_MAX }; struct cpuid_features { struct cpuid_registers cpuid; struct cpuid_registers usable; }; struct cpu_features { struct cpu_features_basic basic; struct cpuid_features features[COMMON_CPUID_INDEX_MAX]; }; /* Get a pointer to the CPU features structure. */ extern const struct cpu_features *__x86_get_cpu_features (unsigned int max) __attribute__ ((const)); Since all feature checks are done through macros, programs compiled with a newer <sys/platform/x86.h> are compatible with the older glibc binaries as long as the layout of struct cpu_features is identical. The features array can be expanded with backward binary compatibility for both .o and .so files. When COMMON_CPUID_INDEX_MAX is increased to support new processor features, __x86_get_cpu_features in the older glibc binaries returns NULL and HAS_CPU_FEATURE/CPU_FEATURE_USABLE return false on the new processor feature. No new symbol version is neeeded. Both CPU_FEATURE_USABLE and HAS_CPU_FEATURE are provided. HAS_CPU_FEATURE can be used to identify processor features. Note: Although GCC has __builtin_cpu_supports, it only supports a subset of <sys/platform/x86.h> and it is equivalent to CPU_FEATURE_USABLE. It doesn't support HAS_CPU_FEATURE.
2020-06-30 01:30:54 +00:00
#str, "HAS_CPU_FEATURE (" #name ")");
static int
do_test (int argc, char **argv)
{
int fails = 0;
#if __GNUC_PREREQ (11, 0)
fails += CHECK_SUPPORTS (adx, ADX);
#endif
#if __GNUC_PREREQ (6, 0)
fails += CHECK_SUPPORTS (aes, AES);
#endif
#if __GNUC_PREREQ (11, 1)
fails += CHECK_SUPPORTS (amx_bf16, AMX_BF16);
fails += CHECK_SUPPORTS (amx_int8, AMX_INT8);
fails += CHECK_SUPPORTS (amx_tile, AMX_TILE);
#endif
fails += CHECK_SUPPORTS (avx, AVX);
fails += CHECK_SUPPORTS (avx2, AVX2);
#if __GNUC_PREREQ (7, 0)
fails += CHECK_SUPPORTS (avx5124fmaps, AVX512_4FMAPS);
fails += CHECK_SUPPORTS (avx5124vnniw, AVX512_4VNNIW);
#endif
#if __GNUC_PREREQ (10, 0)
fails += CHECK_SUPPORTS (avx512bf16, AVX512_BF16);
#endif
#if __GNUC_PREREQ (8, 0)
fails += CHECK_SUPPORTS (avx512bitalg, AVX512_BITALG);
#endif
#if __GNUC_PREREQ (6, 0)
fails += CHECK_SUPPORTS (avx512ifma, AVX512_IFMA);
fails += CHECK_SUPPORTS (avx512vbmi, AVX512_VBMI);
#endif
#if __GNUC_PREREQ (8, 0)
fails += CHECK_SUPPORTS (avx512vbmi2, AVX512_VBMI2);
fails += CHECK_SUPPORTS (avx512vnni, AVX512_VNNI);
#endif
#if __GNUC_PREREQ (10, 0)
fails += CHECK_SUPPORTS (avx512vp2intersect, AVX512_VP2INTERSECT);
#endif
#if __GNUC_PREREQ (7, 0)
fails += CHECK_SUPPORTS (avx512vpopcntdq, AVX512_VPOPCNTDQ);
#endif
#if __GNUC_PREREQ (6, 0)
fails += CHECK_SUPPORTS (avx512bw, AVX512BW);
fails += CHECK_SUPPORTS (avx512cd, AVX512CD);
fails += CHECK_SUPPORTS (avx512er, AVX512ER);
fails += CHECK_SUPPORTS (avx512dq, AVX512DQ);
#endif
#if __GNUC_PREREQ (5, 0)
fails += CHECK_SUPPORTS (avx512f, AVX512F);
#endif
#if __GNUC_PREREQ (6, 0)
fails += CHECK_SUPPORTS (avx512pf, AVX512PF);
fails += CHECK_SUPPORTS (avx512vl, AVX512VL);
#endif
#if __GNUC_PREREQ (5, 0)
fails += CHECK_SUPPORTS (bmi, BMI1);
fails += CHECK_SUPPORTS (bmi2, BMI2);
#endif
#if __GNUC_PREREQ (11, 0)
fails += CHECK_SUPPORTS (cldemote, CLDEMOTE);
fails += CHECK_SUPPORTS (clflushopt, CLFLUSHOPT);
fails += CHECK_SUPPORTS (clwb, CLWB);
#endif
fails += CHECK_SUPPORTS (cmov, CMOV);
#if __GNUC_PREREQ (11, 0)
fails += CHECK_SUPPORTS (cmpxchg16b, CMPXCHG16B);
fails += CHECK_SUPPORTS (cmpxchg8b, CX8);
fails += CHECK_SUPPORTS (enqcmd, ENQCMD);
fails += CHECK_SUPPORTS (f16c, F16C);
#endif
#if __GNUC_PREREQ (4, 9)
fails += CHECK_SUPPORTS (fma, FMA);
fails += CHECK_SUPPORTS (fma4, FMA4);
#endif
#if __GNUC_PREREQ (11, 0)
x86: Adjust tst-cpu-features-supports.c for GCC 11 Check HAS_CPU_FEATURE instead of CPU_FEATURE_USABLE for FSGSBASE, IBT, LM, SHSTK and XSAVES since FSGSBASE requires kernel support, IBT/SHSTK/LM require OS support and XSAVES is supervisor-mode only.
2020-12-03 23:02:44 +00:00
fails += CHECK_CPU_SUPPORTS (fsgsbase, FSGSBASE);
x86: Install <sys/platform/x86.h> [BZ #26124] Install <sys/platform/x86.h> so that programmers can do #if __has_include(<sys/platform/x86.h>) #include <sys/platform/x86.h> #endif ... if (CPU_FEATURE_USABLE (SSE2)) ... if (CPU_FEATURE_USABLE (AVX2)) ... <sys/platform/x86.h> exports only: enum { COMMON_CPUID_INDEX_1 = 0, COMMON_CPUID_INDEX_7, COMMON_CPUID_INDEX_80000001, COMMON_CPUID_INDEX_D_ECX_1, COMMON_CPUID_INDEX_80000007, COMMON_CPUID_INDEX_80000008, COMMON_CPUID_INDEX_7_ECX_1, /* Keep the following line at the end. */ COMMON_CPUID_INDEX_MAX }; struct cpuid_features { struct cpuid_registers cpuid; struct cpuid_registers usable; }; struct cpu_features { struct cpu_features_basic basic; struct cpuid_features features[COMMON_CPUID_INDEX_MAX]; }; /* Get a pointer to the CPU features structure. */ extern const struct cpu_features *__x86_get_cpu_features (unsigned int max) __attribute__ ((const)); Since all feature checks are done through macros, programs compiled with a newer <sys/platform/x86.h> are compatible with the older glibc binaries as long as the layout of struct cpu_features is identical. The features array can be expanded with backward binary compatibility for both .o and .so files. When COMMON_CPUID_INDEX_MAX is increased to support new processor features, __x86_get_cpu_features in the older glibc binaries returns NULL and HAS_CPU_FEATURE/CPU_FEATURE_USABLE return false on the new processor feature. No new symbol version is neeeded. Both CPU_FEATURE_USABLE and HAS_CPU_FEATURE are provided. HAS_CPU_FEATURE can be used to identify processor features. Note: Although GCC has __builtin_cpu_supports, it only supports a subset of <sys/platform/x86.h> and it is equivalent to CPU_FEATURE_USABLE. It doesn't support HAS_CPU_FEATURE.
2020-06-30 01:30:54 +00:00
fails += CHECK_SUPPORTS (fxsave, FXSR);
#endif
#if __GNUC_PREREQ (8, 0)
fails += CHECK_SUPPORTS (gfni, GFNI);
#endif
#if __GNUC_PREREQ (11, 0)
fails += CHECK_SUPPORTS (hle, HLE);
x86: Adjust tst-cpu-features-supports.c for GCC 11 Check HAS_CPU_FEATURE instead of CPU_FEATURE_USABLE for FSGSBASE, IBT, LM, SHSTK and XSAVES since FSGSBASE requires kernel support, IBT/SHSTK/LM require OS support and XSAVES is supervisor-mode only.
2020-12-03 23:02:44 +00:00
fails += CHECK_CPU_SUPPORTS (ibt, IBT);
x86: Install <sys/platform/x86.h> [BZ #26124] Install <sys/platform/x86.h> so that programmers can do #if __has_include(<sys/platform/x86.h>) #include <sys/platform/x86.h> #endif ... if (CPU_FEATURE_USABLE (SSE2)) ... if (CPU_FEATURE_USABLE (AVX2)) ... <sys/platform/x86.h> exports only: enum { COMMON_CPUID_INDEX_1 = 0, COMMON_CPUID_INDEX_7, COMMON_CPUID_INDEX_80000001, COMMON_CPUID_INDEX_D_ECX_1, COMMON_CPUID_INDEX_80000007, COMMON_CPUID_INDEX_80000008, COMMON_CPUID_INDEX_7_ECX_1, /* Keep the following line at the end. */ COMMON_CPUID_INDEX_MAX }; struct cpuid_features { struct cpuid_registers cpuid; struct cpuid_registers usable; }; struct cpu_features { struct cpu_features_basic basic; struct cpuid_features features[COMMON_CPUID_INDEX_MAX]; }; /* Get a pointer to the CPU features structure. */ extern const struct cpu_features *__x86_get_cpu_features (unsigned int max) __attribute__ ((const)); Since all feature checks are done through macros, programs compiled with a newer <sys/platform/x86.h> are compatible with the older glibc binaries as long as the layout of struct cpu_features is identical. The features array can be expanded with backward binary compatibility for both .o and .so files. When COMMON_CPUID_INDEX_MAX is increased to support new processor features, __x86_get_cpu_features in the older glibc binaries returns NULL and HAS_CPU_FEATURE/CPU_FEATURE_USABLE return false on the new processor feature. No new symbol version is neeeded. Both CPU_FEATURE_USABLE and HAS_CPU_FEATURE are provided. HAS_CPU_FEATURE can be used to identify processor features. Note: Although GCC has __builtin_cpu_supports, it only supports a subset of <sys/platform/x86.h> and it is equivalent to CPU_FEATURE_USABLE. It doesn't support HAS_CPU_FEATURE.
2020-06-30 01:30:54 +00:00
fails += CHECK_SUPPORTS (lahf_lm, LAHF64_SAHF64);
x86: Adjust tst-cpu-features-supports.c for GCC 11 Check HAS_CPU_FEATURE instead of CPU_FEATURE_USABLE for FSGSBASE, IBT, LM, SHSTK and XSAVES since FSGSBASE requires kernel support, IBT/SHSTK/LM require OS support and XSAVES is supervisor-mode only.
2020-12-03 23:02:44 +00:00
fails += CHECK_CPU_SUPPORTS (lm, LM);
x86: Install <sys/platform/x86.h> [BZ #26124] Install <sys/platform/x86.h> so that programmers can do #if __has_include(<sys/platform/x86.h>) #include <sys/platform/x86.h> #endif ... if (CPU_FEATURE_USABLE (SSE2)) ... if (CPU_FEATURE_USABLE (AVX2)) ... <sys/platform/x86.h> exports only: enum { COMMON_CPUID_INDEX_1 = 0, COMMON_CPUID_INDEX_7, COMMON_CPUID_INDEX_80000001, COMMON_CPUID_INDEX_D_ECX_1, COMMON_CPUID_INDEX_80000007, COMMON_CPUID_INDEX_80000008, COMMON_CPUID_INDEX_7_ECX_1, /* Keep the following line at the end. */ COMMON_CPUID_INDEX_MAX }; struct cpuid_features { struct cpuid_registers cpuid; struct cpuid_registers usable; }; struct cpu_features { struct cpu_features_basic basic; struct cpuid_features features[COMMON_CPUID_INDEX_MAX]; }; /* Get a pointer to the CPU features structure. */ extern const struct cpu_features *__x86_get_cpu_features (unsigned int max) __attribute__ ((const)); Since all feature checks are done through macros, programs compiled with a newer <sys/platform/x86.h> are compatible with the older glibc binaries as long as the layout of struct cpu_features is identical. The features array can be expanded with backward binary compatibility for both .o and .so files. When COMMON_CPUID_INDEX_MAX is increased to support new processor features, __x86_get_cpu_features in the older glibc binaries returns NULL and HAS_CPU_FEATURE/CPU_FEATURE_USABLE return false on the new processor feature. No new symbol version is neeeded. Both CPU_FEATURE_USABLE and HAS_CPU_FEATURE are provided. HAS_CPU_FEATURE can be used to identify processor features. Note: Although GCC has __builtin_cpu_supports, it only supports a subset of <sys/platform/x86.h> and it is equivalent to CPU_FEATURE_USABLE. It doesn't support HAS_CPU_FEATURE.
2020-06-30 01:30:54 +00:00
fails += CHECK_SUPPORTS (lwp, LWP);
fails += CHECK_SUPPORTS (lzcnt, LZCNT);
#endif
fails += CHECK_SUPPORTS (mmx, MMX);
#if __GNUC_PREREQ (11, 0)
fails += CHECK_SUPPORTS (movbe, MOVBE);
fails += CHECK_SUPPORTS (movdiri, MOVDIRI);
fails += CHECK_SUPPORTS (movdir64b, MOVDIR64B);
fails += CHECK_SUPPORTS (osxsave, OSXSAVE);
fails += CHECK_SUPPORTS (pconfig, PCONFIG);
fails += CHECK_SUPPORTS (pku, PKU);
#endif
fails += CHECK_SUPPORTS (popcnt, POPCNT);
#if __GNUC_PREREQ (11, 0)
fails += CHECK_SUPPORTS (prefetchwt1, PREFETCHWT1);
x86: Add PTWRITE feature detection [BZ #27346] 1. Add CPUID_INDEX_14_ECX_0 for CPUID leaf 0x14 to detect PTWRITE feature in EBX of CPUID leaf 0x14 with ECX == 0. 2. Add PTWRITE detection to CPU feature tests. 3. Add 2 static CPU feature tests.
2021-02-04 18:39:34 +00:00
fails += CHECK_SUPPORTS (ptwrite, PTWRITE);
x86: Install <sys/platform/x86.h> [BZ #26124] Install <sys/platform/x86.h> so that programmers can do #if __has_include(<sys/platform/x86.h>) #include <sys/platform/x86.h> #endif ... if (CPU_FEATURE_USABLE (SSE2)) ... if (CPU_FEATURE_USABLE (AVX2)) ... <sys/platform/x86.h> exports only: enum { COMMON_CPUID_INDEX_1 = 0, COMMON_CPUID_INDEX_7, COMMON_CPUID_INDEX_80000001, COMMON_CPUID_INDEX_D_ECX_1, COMMON_CPUID_INDEX_80000007, COMMON_CPUID_INDEX_80000008, COMMON_CPUID_INDEX_7_ECX_1, /* Keep the following line at the end. */ COMMON_CPUID_INDEX_MAX }; struct cpuid_features { struct cpuid_registers cpuid; struct cpuid_registers usable; }; struct cpu_features { struct cpu_features_basic basic; struct cpuid_features features[COMMON_CPUID_INDEX_MAX]; }; /* Get a pointer to the CPU features structure. */ extern const struct cpu_features *__x86_get_cpu_features (unsigned int max) __attribute__ ((const)); Since all feature checks are done through macros, programs compiled with a newer <sys/platform/x86.h> are compatible with the older glibc binaries as long as the layout of struct cpu_features is identical. The features array can be expanded with backward binary compatibility for both .o and .so files. When COMMON_CPUID_INDEX_MAX is increased to support new processor features, __x86_get_cpu_features in the older glibc binaries returns NULL and HAS_CPU_FEATURE/CPU_FEATURE_USABLE return false on the new processor feature. No new symbol version is neeeded. Both CPU_FEATURE_USABLE and HAS_CPU_FEATURE are provided. HAS_CPU_FEATURE can be used to identify processor features. Note: Although GCC has __builtin_cpu_supports, it only supports a subset of <sys/platform/x86.h> and it is equivalent to CPU_FEATURE_USABLE. It doesn't support HAS_CPU_FEATURE.
2020-06-30 01:30:54 +00:00
fails += CHECK_SUPPORTS (rdpid, RDPID);
fails += CHECK_SUPPORTS (rdrnd, RDRAND);
fails += CHECK_SUPPORTS (rdseed, RDSEED);
fails += CHECK_SUPPORTS (rtm, RTM);
fails += CHECK_SUPPORTS (serialize, SERIALIZE);
fails += CHECK_SUPPORTS (sha, SHA);
x86: Adjust tst-cpu-features-supports.c for GCC 11 Check HAS_CPU_FEATURE instead of CPU_FEATURE_USABLE for FSGSBASE, IBT, LM, SHSTK and XSAVES since FSGSBASE requires kernel support, IBT/SHSTK/LM require OS support and XSAVES is supervisor-mode only.
2020-12-03 23:02:44 +00:00
fails += CHECK_CPU_SUPPORTS (shstk, SHSTK);
x86: Install <sys/platform/x86.h> [BZ #26124] Install <sys/platform/x86.h> so that programmers can do #if __has_include(<sys/platform/x86.h>) #include <sys/platform/x86.h> #endif ... if (CPU_FEATURE_USABLE (SSE2)) ... if (CPU_FEATURE_USABLE (AVX2)) ... <sys/platform/x86.h> exports only: enum { COMMON_CPUID_INDEX_1 = 0, COMMON_CPUID_INDEX_7, COMMON_CPUID_INDEX_80000001, COMMON_CPUID_INDEX_D_ECX_1, COMMON_CPUID_INDEX_80000007, COMMON_CPUID_INDEX_80000008, COMMON_CPUID_INDEX_7_ECX_1, /* Keep the following line at the end. */ COMMON_CPUID_INDEX_MAX }; struct cpuid_features { struct cpuid_registers cpuid; struct cpuid_registers usable; }; struct cpu_features { struct cpu_features_basic basic; struct cpuid_features features[COMMON_CPUID_INDEX_MAX]; }; /* Get a pointer to the CPU features structure. */ extern const struct cpu_features *__x86_get_cpu_features (unsigned int max) __attribute__ ((const)); Since all feature checks are done through macros, programs compiled with a newer <sys/platform/x86.h> are compatible with the older glibc binaries as long as the layout of struct cpu_features is identical. The features array can be expanded with backward binary compatibility for both .o and .so files. When COMMON_CPUID_INDEX_MAX is increased to support new processor features, __x86_get_cpu_features in the older glibc binaries returns NULL and HAS_CPU_FEATURE/CPU_FEATURE_USABLE return false on the new processor feature. No new symbol version is neeeded. Both CPU_FEATURE_USABLE and HAS_CPU_FEATURE are provided. HAS_CPU_FEATURE can be used to identify processor features. Note: Although GCC has __builtin_cpu_supports, it only supports a subset of <sys/platform/x86.h> and it is equivalent to CPU_FEATURE_USABLE. It doesn't support HAS_CPU_FEATURE.
2020-06-30 01:30:54 +00:00
#endif
fails += CHECK_SUPPORTS (sse, SSE);
fails += CHECK_SUPPORTS (sse2, SSE2);
fails += CHECK_SUPPORTS (sse3, SSE3);
fails += CHECK_SUPPORTS (sse4.1, SSE4_1);
fails += CHECK_SUPPORTS (sse4.2, SSE4_2);
#if __GNUC_PREREQ (4, 9)
fails += CHECK_SUPPORTS (sse4a, SSE4A);
#endif
fails += CHECK_SUPPORTS (ssse3, SSSE3);
#if __GNUC_PREREQ (11, 0)
fails += CHECK_SUPPORTS (tbm, TBM);
fails += CHECK_SUPPORTS (tsxldtrk, TSXLDTRK);
fails += CHECK_SUPPORTS (vaes, VAES);
#endif
#if __GNUC_PREREQ (8, 0)
fails += CHECK_SUPPORTS (vpclmulqdq, VPCLMULQDQ);
#endif
#if __GNUC_PREREQ (11, 0)
fails += CHECK_SUPPORTS (waitpkg, WAITPKG);
fails += CHECK_SUPPORTS (wbnoinvd, WBNOINVD);
#endif
#if __GNUC_PREREQ (4, 9)
fails += CHECK_SUPPORTS (xop, XOP);
#endif
#if __GNUC_PREREQ (11, 0)
fails += CHECK_SUPPORTS (xsave, XSAVE);
fails += CHECK_SUPPORTS (xsavec, XSAVEC);
fails += CHECK_SUPPORTS (xsaveopt, XSAVEOPT);
x86: Adjust tst-cpu-features-supports.c for GCC 11 Check HAS_CPU_FEATURE instead of CPU_FEATURE_USABLE for FSGSBASE, IBT, LM, SHSTK and XSAVES since FSGSBASE requires kernel support, IBT/SHSTK/LM require OS support and XSAVES is supervisor-mode only.
2020-12-03 23:02:44 +00:00
fails += CHECK_CPU_SUPPORTS (xsaves, XSAVES);
x86: Install <sys/platform/x86.h> [BZ #26124] Install <sys/platform/x86.h> so that programmers can do #if __has_include(<sys/platform/x86.h>) #include <sys/platform/x86.h> #endif ... if (CPU_FEATURE_USABLE (SSE2)) ... if (CPU_FEATURE_USABLE (AVX2)) ... <sys/platform/x86.h> exports only: enum { COMMON_CPUID_INDEX_1 = 0, COMMON_CPUID_INDEX_7, COMMON_CPUID_INDEX_80000001, COMMON_CPUID_INDEX_D_ECX_1, COMMON_CPUID_INDEX_80000007, COMMON_CPUID_INDEX_80000008, COMMON_CPUID_INDEX_7_ECX_1, /* Keep the following line at the end. */ COMMON_CPUID_INDEX_MAX }; struct cpuid_features { struct cpuid_registers cpuid; struct cpuid_registers usable; }; struct cpu_features { struct cpu_features_basic basic; struct cpuid_features features[COMMON_CPUID_INDEX_MAX]; }; /* Get a pointer to the CPU features structure. */ extern const struct cpu_features *__x86_get_cpu_features (unsigned int max) __attribute__ ((const)); Since all feature checks are done through macros, programs compiled with a newer <sys/platform/x86.h> are compatible with the older glibc binaries as long as the layout of struct cpu_features is identical. The features array can be expanded with backward binary compatibility for both .o and .so files. When COMMON_CPUID_INDEX_MAX is increased to support new processor features, __x86_get_cpu_features in the older glibc binaries returns NULL and HAS_CPU_FEATURE/CPU_FEATURE_USABLE return false on the new processor feature. No new symbol version is neeeded. Both CPU_FEATURE_USABLE and HAS_CPU_FEATURE are provided. HAS_CPU_FEATURE can be used to identify processor features. Note: Although GCC has __builtin_cpu_supports, it only supports a subset of <sys/platform/x86.h> and it is equivalent to CPU_FEATURE_USABLE. It doesn't support HAS_CPU_FEATURE.
2020-06-30 01:30:54 +00:00
#endif
printf ("%d differences between __builtin_cpu_supports and glibc code.\n",
fails);
return (fails != 0);
}
#include "../../../test-skeleton.c"
Reference in New Issue Copy Permalink