| /* This file is part of the GNU C Library. |
| Copyright (C) 2008, 2009, 2010 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) |
| |
| #ifdef __ASSEMBLER__ |
| |
| # include <ifunc-defines.h> |
| |
| # define bit_SSE2 (1 << 26) |
| # define bit_SSSE3 (1 << 9) |
| # define bit_SSE4_1 (1 << 19) |
| # define bit_SSE4_2 (1 << 20) |
| |
| # 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_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 |
| |
| #else /* __ASSEMBLER__ */ |
| |
| # include <sys/param.h> |
| |
| enum |
| { |
| COMMON_CPUID_INDEX_1 = 0, |
| /* 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 & (1 << (bit))) != 0) |
| |
| /* Following are the feature tests used throughout libc. */ |
| |
| # define HAS_SSE2 HAS_CPU_FEATURE (COMMON_CPUID_INDEX_1, edx, 26) |
| # define HAS_POPCOUNT HAS_CPU_FEATURE (COMMON_CPUID_INDEX_1, ecx, 23) |
| # define HAS_SSSE3 HAS_CPU_FEATURE (COMMON_CPUID_INDEX_1, ecx, 9) |
| # define HAS_SSE4_1 HAS_CPU_FEATURE (COMMON_CPUID_INDEX_1, ecx, 19) |
| # define HAS_SSE4_2 HAS_CPU_FEATURE (COMMON_CPUID_INDEX_1, ecx, 20) |
| # define HAS_FMA HAS_CPU_FEATURE (COMMON_CPUID_INDEX_1, ecx, 12) |
| |
| # 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 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) |
| |
| #endif /* __ASSEMBLER__ */ |