mirror of
https://sourceware.org/git/glibc.git
synced 2024-12-23 11:20:07 +00:00
148 lines
4.8 KiB
C
148 lines
4.8 KiB
C
/* This file is part of the GNU C Library.
|
|
Copyright (C) 2008, 2009, 2010, 2011 Free Software Foundation, Inc.
|
|
|
|
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, write to the Free
|
|
Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
|
|
02111-1307 USA. */
|
|
|
|
#define bit_Fast_Rep_String (1 << 0)
|
|
#define bit_Fast_Copy_Backward (1 << 1)
|
|
#define bit_Slow_BSF (1 << 2)
|
|
#define bit_Prefer_SSE_for_memop (1 << 3)
|
|
#define bit_Fast_Unaligned_Load (1 << 4)
|
|
#define bit_Prefer_PMINUB_for_stringop (1 << 5)
|
|
|
|
#define bit_SSE2 (1 << 26)
|
|
#define bit_SSSE3 (1 << 9)
|
|
#define bit_SSE4_1 (1 << 19)
|
|
#define bit_SSE4_2 (1 << 20)
|
|
#define bit_AVX (1 << 28)
|
|
#define bit_POPCOUNT (1 << 23)
|
|
#define bit_FMA (1 << 12)
|
|
#define bit_FMA4 (1 << 16)
|
|
|
|
#ifdef __ASSEMBLER__
|
|
|
|
# include <ifunc-defines.h>
|
|
|
|
# define index_SSE2 COMMON_CPUID_INDEX_1*CPUID_SIZE+CPUID_EDX_OFFSET
|
|
# define index_SSSE3 COMMON_CPUID_INDEX_1*CPUID_SIZE+CPUID_ECX_OFFSET
|
|
# define index_SSE4_1 COMMON_CPUID_INDEX_1*CPUID_SIZE+CPUID_ECX_OFFSET
|
|
# define index_SSE4_2 COMMON_CPUID_INDEX_1*CPUID_SIZE+CPUID_ECX_OFFSET
|
|
# define index_AVX COMMON_CPUID_INDEX_1*CPUID_SIZE+CPUID_ECX_OFFSET
|
|
|
|
# define index_Fast_Rep_String FEATURE_INDEX_1*FEATURE_SIZE
|
|
# define index_Fast_Copy_Backward FEATURE_INDEX_1*FEATURE_SIZE
|
|
# define index_Slow_BSF FEATURE_INDEX_1*FEATURE_SIZE
|
|
# define index_Prefer_SSE_for_memop FEATURE_INDEX_1*FEATURE_SIZE
|
|
# define index_Fast_Unaligned_Load FEATURE_INDEX_1*FEATURE_SIZE
|
|
# define index_Prefer_PMINUB_for_stringop FEATURE_INDEX_1*FEATURE_SIZE
|
|
|
|
#else /* __ASSEMBLER__ */
|
|
|
|
# include <sys/param.h>
|
|
|
|
enum
|
|
{
|
|
COMMON_CPUID_INDEX_1 = 0,
|
|
COMMON_CPUID_INDEX_80000001, /* for AMD */
|
|
/* Keep the following line at the end. */
|
|
COMMON_CPUID_INDEX_MAX
|
|
};
|
|
|
|
enum
|
|
{
|
|
FEATURE_INDEX_1 = 0,
|
|
/* Keep the following line at the end. */
|
|
FEATURE_INDEX_MAX
|
|
};
|
|
|
|
extern struct cpu_features
|
|
{
|
|
enum cpu_features_kind
|
|
{
|
|
arch_kind_unknown = 0,
|
|
arch_kind_intel,
|
|
arch_kind_amd,
|
|
arch_kind_other
|
|
} kind;
|
|
int max_cpuid;
|
|
struct cpuid_registers
|
|
{
|
|
unsigned int eax;
|
|
unsigned int ebx;
|
|
unsigned int ecx;
|
|
unsigned int edx;
|
|
} cpuid[COMMON_CPUID_INDEX_MAX];
|
|
unsigned int family;
|
|
unsigned int model;
|
|
unsigned int feature[FEATURE_INDEX_MAX];
|
|
} __cpu_features attribute_hidden;
|
|
|
|
|
|
extern void __init_cpu_features (void) attribute_hidden;
|
|
#define INIT_ARCH()\
|
|
do \
|
|
if (__cpu_features.kind == arch_kind_unknown) \
|
|
__init_cpu_features (); \
|
|
while (0)
|
|
|
|
/* Used from outside libc.so to get access to the CPU features structure. */
|
|
extern const struct cpu_features *__get_cpu_features (void)
|
|
__attribute__ ((const));
|
|
|
|
# ifndef NOT_IN_libc
|
|
# define __get_cpu_features() (&__cpu_features)
|
|
# endif
|
|
|
|
# define HAS_CPU_FEATURE(idx, reg, bit) \
|
|
((__get_cpu_features ()->cpuid[idx].reg & (bit)) != 0)
|
|
|
|
/* Following are the feature tests used throughout libc. */
|
|
|
|
# define HAS_SSE2 HAS_CPU_FEATURE (COMMON_CPUID_INDEX_1, edx, bit_SSE2)
|
|
# define HAS_POPCOUNT HAS_CPU_FEATURE (COMMON_CPUID_INDEX_1, ecx, bit_POPCOUNT)
|
|
# define HAS_SSSE3 HAS_CPU_FEATURE (COMMON_CPUID_INDEX_1, ecx, bit_SSSE3)
|
|
# define HAS_SSE4_1 HAS_CPU_FEATURE (COMMON_CPUID_INDEX_1, ecx, bit_SSE4_1)
|
|
# define HAS_SSE4_2 HAS_CPU_FEATURE (COMMON_CPUID_INDEX_1, ecx, bit_SSE4_2)
|
|
# define HAS_FMA HAS_CPU_FEATURE (COMMON_CPUID_INDEX_1, ecx, bit_FMA)
|
|
# define HAS_AVX HAS_CPU_FEATURE (COMMON_CPUID_INDEX_1, ecx, bit_AVX)
|
|
# define HAS_FMA4 HAS_CPU_FEATURE (COMMON_CPUID_INDEX_80000001, ecx, bit_FMA4)
|
|
|
|
# define index_Fast_Rep_String FEATURE_INDEX_1
|
|
# define index_Fast_Copy_Backward FEATURE_INDEX_1
|
|
# define index_Slow_BSF FEATURE_INDEX_1
|
|
# define index_Prefer_SSE_for_memop FEATURE_INDEX_1
|
|
# define index_Fast_Unaligned_Load FEATURE_INDEX_1
|
|
|
|
#define HAS_ARCH_FEATURE(idx, bit) \
|
|
((__get_cpu_features ()->feature[idx] & (bit)) != 0)
|
|
|
|
#define HAS_FAST_REP_STRING \
|
|
HAS_ARCH_FEATURE (index_Fast_Rep_String, bit_Fast_Rep_String)
|
|
|
|
#define HAS_FAST_COPY_BACKWARD \
|
|
HAS_ARCH_FEATURE (index_Fast_Copy_Backward, bit_Fast_Copy_Backward)
|
|
|
|
#define HAS_SLOW_BSF \
|
|
HAS_ARCH_FEATURE (index_Slow_BSF, bit_Slow_BSF)
|
|
|
|
#define HAS_PREFER_SSE_FOR_MEMOP \
|
|
HAS_ARCH_FEATURE (index_Prefer_SSE_for_memop, bit_Prefer_SSE_for_memop)
|
|
|
|
#define HAS_FAST_UNALIGNED_LOAD \
|
|
HAS_ARCH_FEATURE (index_Fast_Unaligned_Load, bit_Fast_Unaligned_Load)
|
|
|
|
#endif /* __ASSEMBLER__ */
|