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| author | Florian Weimer <fweimer@redhat.com> | 2021-03-02 14:58:05 +0100 |
|---|---|---|
| committer | Florian Weimer <fweimer@redhat.com> | 2021-03-02 15:01:06 +0100 |
| commit | e4933c8a92ea08eecdf3ab45e7f76c95dc3d20ac (patch) | |
| tree | de1de15ad0089d01cbd2e26ee31ba54bff3d815f /sysdeps/x86/include/cpu-features.h | |
| parent | 851f32cf7bf7067f73b991610778915edd57d7b4 (diff) | |
| download | glibc-e4933c8a92ea08eecdf3ab45e7f76c95dc3d20ac.tar glibc-e4933c8a92ea08eecdf3ab45e7f76c95dc3d20ac.tar.gz glibc-e4933c8a92ea08eecdf3ab45e7f76c95dc3d20ac.tar.bz2 glibc-e4933c8a92ea08eecdf3ab45e7f76c95dc3d20ac.zip | |
x86: Automate generation of PREFERRED_FEATURE_INDEX_1 bitfield
Use a .def file to define the bitfield layout, so that it is possible
to iterate over field members using the preprocessor.
Diffstat (limited to 'sysdeps/x86/include/cpu-features.h')
| -rw-r--r-- | sysdeps/x86/include/cpu-features.h | 51 |
1 files changed, 17 insertions, 34 deletions
diff --git a/sysdeps/x86/include/cpu-features.h b/sysdeps/x86/include/cpu-features.h index ae5cb24be5..0fb988ead0 100644 --- a/sysdeps/x86/include/cpu-features.h +++ b/sysdeps/x86/include/cpu-features.h @@ -772,40 +772,23 @@ enum /* EBX. */ #define reg_PTWRITE ebx -/* 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 +/* PREFERRED_FEATURE_INDEX_1. First define the bitindex values + sequentially, then define the bit_arch* and index_arch_* lookup + constants. */ +enum + { +#define BIT(x) _bitindex_arch_##x , +#include "cpu-features-preferred_feature_index_1.def" +#undef BIT + }; +enum + { +#define BIT(x) \ + bit_arch_##x = 1u << _bitindex_arch_##x , \ + index_arch_##x = PREFERRED_FEATURE_INDEX_1, +#include "cpu-features-preferred_feature_index_1.def" +#undef BIT + }; /* XCR0 Feature flags. */ #define bit_XMM_state (1u << 1) |