diff options
Diffstat (limited to 'sysdeps/x86_64/multiarch/init-arch.h')
| -rw-r--r-- | sysdeps/x86_64/multiarch/init-arch.h | 51 |
1 files changed, 34 insertions, 17 deletions
diff --git a/sysdeps/x86_64/multiarch/init-arch.h b/sysdeps/x86_64/multiarch/init-arch.h index 5054e46f61..45e2651678 100644 --- a/sysdeps/x86_64/multiarch/init-arch.h +++ b/sysdeps/x86_64/multiarch/init-arch.h @@ -1,5 +1,5 @@ /* This file is part of the GNU C Library. - Copyright (C) 2008, 2009, 2010, 2011, 2012 Free Software Foundation, Inc. + Copyright (C) 2008-2012 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 @@ -21,8 +21,10 @@ #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_YMM_Usable (1 << 6) +#define bit_AVX_Usable (1 << 6) +#define bit_FMA4_Usable (1 << 7) +/* CPUID Feature flags. */ #define bit_SSE2 (1 << 26) #define bit_SSSE3 (1 << 9) #define bit_SSE4_1 (1 << 19) @@ -33,6 +35,10 @@ #define bit_FMA (1 << 12) #define bit_FMA4 (1 << 16) +/* XCR0 Feature flags. */ +#define bit_XMM_state (1 << 1) +#define bit_YMM_state (2 << 1) + #ifdef __ASSEMBLER__ # include <ifunc-defines.h> @@ -49,7 +55,8 @@ # 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 -# define index_YMM_Usable FEATURE_INDEX_1*FEATURE_SIZE +# define index_AVX_Usable FEATURE_INDEX_1*FEATURE_SIZE +# define index_FMA4_Usable FEATURE_INDEX_1*FEATURE_SIZE #else /* __ASSEMBLER__ */ @@ -113,35 +120,45 @@ extern const struct cpu_features *__get_cpu_features (void) /* Following are the feature tests used throughout libc. */ +/* CPUID_* evaluates to true if the feature flag is enabled. + We always use &__cpu_features because the HAS_CPUID_* macros + are called only within __init_cpu_features, where we can't + call __get_cpu_features without infinite recursion. */ +# define HAS_CPUID_FLAG(idx, reg, bit) \ + (((&__cpu_features)->cpuid[idx].reg & (bit)) != 0) + +# define CPUID_OSXSAVE \ + HAS_CPUID_FLAG (COMMON_CPUID_INDEX_1, ecx, bit_OSXSAVE) +# define CPUID_AVX \ + HAS_CPUID_FLAG (COMMON_CPUID_INDEX_1, ecx, bit_AVX) +# define CPUID_FMA4 \ + HAS_CPUID_FLAG (COMMON_CPUID_INDEX_80000001, ecx, bit_FMA4) + +/* HAS_* evaluates to true if we may use the feature at runtime. */ # 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 index_YMM_Usable FEATURE_INDEX_1 +# define index_AVX_Usable FEATURE_INDEX_1 +# define index_FMA4_Usable FEATURE_INDEX_1 # define HAS_ARCH_FEATURE(name) \ ((__get_cpu_features ()->feature[index_##name] & (bit_##name)) != 0) -# define HAS_FAST_REP_STRING HAS_ARCH_FEATURE (Fast_Rep_String) - -# define HAS_FAST_COPY_BACKWARD HAS_ARCH_FEATURE (Fast_Copy_Backward) - -# define HAS_SLOW_BSF HAS_ARCH_FEATURE (Slow_BSF) - -# define HAS_PREFER_SSE_FOR_MEMOP HAS_ARCH_FEATURE (Prefer_SSE_for_memop) - -# define HAS_FAST_UNALIGNED_LOAD HAS_ARCH_FEATURE (Fast_Unaligned_Load) - -# define HAS_YMM_USABLE HAS_ARCH_FEATURE (YMM_Usable) +# define HAS_FAST_REP_STRING HAS_ARCH_FEATURE (Fast_Rep_String) +# define HAS_FAST_COPY_BACKWARD HAS_ARCH_FEATURE (Fast_Copy_Backward) +# define HAS_SLOW_BSF HAS_ARCH_FEATURE (Slow_BSF) +# define HAS_PREFER_SSE_FOR_MEMOP HAS_ARCH_FEATURE (Prefer_SSE_for_memop) +# define HAS_FAST_UNALIGNED_LOAD HAS_ARCH_FEATURE (Fast_Unaligned_Load) +# define HAS_AVX HAS_ARCH_FEATURE (AVX_Usable) +# define HAS_FMA4 HAS_ARCH_FEATURE (FMA4_Usable) #endif /* __ASSEMBLER__ */ |