mirror of
https://sourceware.org/git/glibc.git
synced 2024-11-25 14:30:06 +00:00
45dcd1af09
CPU_FEATURE_CPU_P is defined in sysdeps/x86/sys/platform/x86.h. Remove the duplicated CPU_FEATURE_CPU_P in sysdeps/x86/include/cpu-features.h.
183 lines
6.6 KiB
C
183 lines
6.6 KiB
C
/* Data structure for x86 CPU features.
|
|
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.
|
|
|
|
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/>. */
|
|
|
|
#ifndef _PRIVATE_CPU_FEATURES_H
|
|
#define _PRIVATE_CPU_FEATURES_H 1
|
|
|
|
#ifdef _CPU_FEATURES_H
|
|
# error this should be impossible
|
|
#endif
|
|
|
|
#ifndef _ISOMAC
|
|
/* Get most of the contents from the public header, but we define a
|
|
different `struct cpu_features' type for private use. */
|
|
# define cpu_features cpu_features_public
|
|
# define __x86_get_cpu_features __x86_get_cpu_features_public
|
|
#endif
|
|
|
|
#include <sysdeps/x86/sys/platform/x86.h>
|
|
|
|
#ifndef _ISOMAC
|
|
|
|
# undef cpu_features
|
|
# undef __x86_get_cpu_features
|
|
# define __get_cpu_features() __x86_get_cpu_features (0)
|
|
|
|
enum
|
|
{
|
|
/* The integer bit array index for the first set of preferred feature
|
|
bits. */
|
|
PREFERRED_FEATURE_INDEX_1 = 0,
|
|
/* The current maximum size of the feature integer bit array. */
|
|
PREFERRED_FEATURE_INDEX_MAX
|
|
};
|
|
|
|
/* Only used directly in cpu-features.c. */
|
|
# define CPU_FEATURE_SET(ptr, name) \
|
|
ptr->features[index_cpu_##name].usable.reg_##name |= bit_cpu_##name;
|
|
# define CPU_FEATURE_UNSET(ptr, name) \
|
|
ptr->features[index_cpu_##name].usable.reg_##name &= ~bit_cpu_##name;
|
|
# define CPU_FEATURE_SET_USABLE(ptr, name) \
|
|
ptr->features[index_cpu_##name].usable.reg_##name \
|
|
|= ptr->features[index_cpu_##name].cpuid.reg_##name & bit_cpu_##name;
|
|
# define CPU_FEATURE_PREFERRED_P(ptr, name) \
|
|
((ptr->preferred[index_arch_##name] & bit_arch_##name) != 0)
|
|
|
|
/* HAS_CPU_FEATURE evaluates to true if CPU supports the feature. */
|
|
# undef HAS_CPU_FEATURE
|
|
# define HAS_CPU_FEATURE(name) \
|
|
CPU_FEATURE_CPU_P (__x86_get_cpu_features (0), name)
|
|
/* CPU_FEATURE_USABLE evaluates to true if the feature is usable. */
|
|
# undef CPU_FEATURE_USABLE
|
|
# define CPU_FEATURE_USABLE(name) \
|
|
CPU_FEATURE_USABLE_P (__x86_get_cpu_features (0), name)
|
|
/* CPU_FEATURE_PREFER evaluates to true if we prefer the feature at
|
|
runtime. */
|
|
# define CPU_FEATURE_PREFERRED(name) \
|
|
CPU_FEATURE_PREFERRED_P(__get_cpu_features (), name)
|
|
|
|
# define CPU_FEATURES_CPU_P(ptr, name) \
|
|
CPU_FEATURE_CPU_P (ptr, name)
|
|
# define CPU_FEATURES_ARCH_P(ptr, name) \
|
|
CPU_FEATURE_PREFERRED_P (ptr, name)
|
|
# define HAS_ARCH_FEATURE(name) \
|
|
CPU_FEATURE_PREFERRED (name)
|
|
|
|
/* PREFERRED_FEATURE_INDEX_1. */
|
|
# define bit_arch_I586 (1u << 0)
|
|
# define bit_arch_I686 (1u << 1)
|
|
# define bit_arch_Fast_Rep_String (1u << 2)
|
|
# define bit_arch_Fast_Copy_Backward (1u << 3)
|
|
# define bit_arch_Fast_Unaligned_Load (1u << 4)
|
|
# define bit_arch_Fast_Unaligned_Copy (1u << 5)
|
|
# define bit_arch_Slow_BSF (1u << 6)
|
|
# define bit_arch_Slow_SSE4_2 (1u << 7)
|
|
# define bit_arch_AVX_Fast_Unaligned_Load (1u << 8)
|
|
# define bit_arch_Prefer_MAP_32BIT_EXEC (1u << 9)
|
|
# define bit_arch_Prefer_PMINUB_for_stringop (1u << 10)
|
|
# define bit_arch_Prefer_No_VZEROUPPER (1u << 11)
|
|
# define bit_arch_Prefer_ERMS (1u << 12)
|
|
# define bit_arch_Prefer_FSRM (1u << 13)
|
|
# define bit_arch_Prefer_No_AVX512 (1u << 14)
|
|
# define bit_arch_MathVec_Prefer_No_AVX512 (1u << 15)
|
|
|
|
# define index_arch_Fast_Rep_String PREFERRED_FEATURE_INDEX_1
|
|
# define index_arch_Fast_Copy_Backward PREFERRED_FEATURE_INDEX_1
|
|
# define index_arch_Slow_BSF PREFERRED_FEATURE_INDEX_1
|
|
# define index_arch_Fast_Unaligned_Load PREFERRED_FEATURE_INDEX_1
|
|
# define index_arch_Prefer_PMINUB_for_stringop PREFERRED_FEATURE_INDEX_1
|
|
# define index_arch_Fast_Unaligned_Copy PREFERRED_FEATURE_INDEX_1
|
|
# define index_arch_I586 PREFERRED_FEATURE_INDEX_1
|
|
# define index_arch_I686 PREFERRED_FEATURE_INDEX_1
|
|
# define index_arch_Slow_SSE4_2 PREFERRED_FEATURE_INDEX_1
|
|
# define index_arch_AVX_Fast_Unaligned_Load PREFERRED_FEATURE_INDEX_1
|
|
# define index_arch_Prefer_MAP_32BIT_EXEC PREFERRED_FEATURE_INDEX_1
|
|
# define index_arch_Prefer_No_VZEROUPPER PREFERRED_FEATURE_INDEX_1
|
|
# define index_arch_Prefer_ERMS PREFERRED_FEATURE_INDEX_1
|
|
# define index_arch_Prefer_No_AVX512 PREFERRED_FEATURE_INDEX_1
|
|
# define index_arch_MathVec_Prefer_No_AVX512 PREFERRED_FEATURE_INDEX_1
|
|
# define index_arch_Prefer_FSRM PREFERRED_FEATURE_INDEX_1
|
|
|
|
/* XCR0 Feature flags. */
|
|
# define bit_XMM_state (1u << 1)
|
|
# define bit_YMM_state (1u << 2)
|
|
# define bit_Opmask_state (1u << 5)
|
|
# define bit_ZMM0_15_state (1u << 6)
|
|
# define bit_ZMM16_31_state (1u << 7)
|
|
# define bit_XTILECFG_state (1u << 17)
|
|
# define bit_XTILEDATA_state (1u << 18)
|
|
|
|
struct cpu_features
|
|
{
|
|
struct cpu_features_basic basic;
|
|
struct cpuid_features features[COMMON_CPUID_INDEX_MAX];
|
|
unsigned int preferred[PREFERRED_FEATURE_INDEX_MAX];
|
|
/* The state size for XSAVEC or XSAVE. The type must be unsigned long
|
|
int so that we use
|
|
|
|
sub xsave_state_size_offset(%rip) %RSP_LP
|
|
|
|
in _dl_runtime_resolve. */
|
|
unsigned long int xsave_state_size;
|
|
/* The full state size for XSAVE when XSAVEC is disabled by
|
|
|
|
GLIBC_TUNABLES=glibc.cpu.hwcaps=-XSAVEC
|
|
*/
|
|
unsigned int xsave_state_full_size;
|
|
/* Data cache size for use in memory and string routines, typically
|
|
L1 size. */
|
|
unsigned long int data_cache_size;
|
|
/* Shared cache size for use in memory and string routines, typically
|
|
L2 or L3 size. */
|
|
unsigned long int shared_cache_size;
|
|
/* Threshold to use non temporal store. */
|
|
unsigned long int non_temporal_threshold;
|
|
/* Threshold to use "rep movsb". */
|
|
unsigned long int rep_movsb_threshold;
|
|
/* Threshold to use "rep stosb". */
|
|
unsigned long int rep_stosb_threshold;
|
|
};
|
|
|
|
# if defined (_LIBC) && !IS_IN (nonlib)
|
|
/* Unused for x86. */
|
|
# define INIT_ARCH()
|
|
# define __x86_get_cpu_features(max) (&GLRO(dl_x86_cpu_features))
|
|
extern void _dl_x86_init_cpu_features (void) attribute_hidden;
|
|
# endif
|
|
|
|
# ifdef __x86_64__
|
|
# define HAS_CPUID 1
|
|
# elif (defined __i586__ || defined __pentium__ \
|
|
|| defined __geode__ || defined __k6__)
|
|
# define HAS_CPUID 1
|
|
# define HAS_I586 1
|
|
# define HAS_I686 HAS_ARCH_FEATURE (I686)
|
|
# elif defined __i486__
|
|
# define HAS_CPUID 0
|
|
# define HAS_I586 HAS_ARCH_FEATURE (I586)
|
|
# define HAS_I686 HAS_ARCH_FEATURE (I686)
|
|
# else
|
|
# define HAS_CPUID 1
|
|
# define HAS_I586 1
|
|
# define HAS_I686 1
|
|
# endif
|
|
|
|
#endif /* !_ISOMAC */
|
|
|
|
#endif /* include/cpu-features.h */
|