| /* |
| * Copyright 2016 Google Inc. |
| * |
| * Use of this source code is governed by a BSD-style license that can be |
| * found in the LICENSE file. |
| */ |
| |
| #ifndef SkCpu_DEFINED |
| #define SkCpu_DEFINED |
| |
| #include "SkTypes.h" |
| |
| struct SkCpu { |
| enum { |
| SSE1 = 1 << 0, |
| SSE2 = 1 << 1, |
| SSE3 = 1 << 2, |
| SSSE3 = 1 << 3, |
| SSE41 = 1 << 4, |
| SSE42 = 1 << 5, |
| AVX = 1 << 6, |
| F16C = 1 << 7, |
| FMA = 1 << 8, |
| AVX2 = 1 << 9, |
| BMI1 = 1 << 10, |
| BMI2 = 1 << 11, |
| // Handy alias for all the cool Haswell+ instructions. |
| HSW = AVX2 | BMI1 | BMI2 | F16C | FMA, |
| |
| AVX512F = 1 << 12, |
| AVX512DQ = 1 << 13, |
| AVX512IFMA = 1 << 14, |
| AVX512PF = 1 << 15, |
| AVX512ER = 1 << 16, |
| AVX512CD = 1 << 17, |
| AVX512BW = 1 << 18, |
| AVX512VL = 1 << 19, |
| |
| // Handy alias for all the cool Skylake Xeon+ instructions. |
| SKX = AVX512F | AVX512DQ | AVX512CD | AVX512BW | AVX512VL, |
| }; |
| enum { |
| NEON = 1 << 0, |
| NEON_FMA = 1 << 1, |
| VFP_FP16 = 1 << 2, |
| CRC32 = 1 << 3, |
| }; |
| |
| static void CacheRuntimeFeatures(); |
| static bool Supports(uint32_t); |
| private: |
| static uint32_t gCachedFeatures; |
| }; |
| |
| inline bool SkCpu::Supports(uint32_t mask) { |
| uint32_t features = gCachedFeatures; |
| |
| // If we mask in compile-time known lower limits, the compiler can |
| // often compile away this entire function. |
| #if SK_CPU_X86 |
| #if SK_CPU_SSE_LEVEL >= SK_CPU_SSE_LEVEL_SSE1 |
| features |= SSE1; |
| #endif |
| #if SK_CPU_SSE_LEVEL >= SK_CPU_SSE_LEVEL_SSE2 |
| features |= SSE2; |
| #endif |
| #if SK_CPU_SSE_LEVEL >= SK_CPU_SSE_LEVEL_SSE3 |
| features |= SSE3; |
| #endif |
| #if SK_CPU_SSE_LEVEL >= SK_CPU_SSE_LEVEL_SSSE3 |
| features |= SSSE3; |
| #endif |
| #if SK_CPU_SSE_LEVEL >= SK_CPU_SSE_LEVEL_SSE41 |
| features |= SSE41; |
| #endif |
| #if SK_CPU_SSE_LEVEL >= SK_CPU_SSE_LEVEL_SSE42 |
| features |= SSE42; |
| #endif |
| #if SK_CPU_SSE_LEVEL >= SK_CPU_SSE_LEVEL_AVX |
| features |= AVX; |
| #endif |
| // F16C goes here if we add SK_CPU_SSE_LEVEL_F16C |
| #if SK_CPU_SSE_LEVEL >= SK_CPU_SSE_LEVEL_AVX2 |
| features |= AVX2; |
| #endif |
| // FMA doesn't fit neatly into this total ordering. |
| // It's available on Haswell+ just like AVX2, but it's technically a different bit. |
| // TODO: circle back on this if we find ourselves limited by lack of compile-time FMA |
| |
| #if defined(SK_CPU_LIMIT_SSE41) |
| features &= (SkCpu::SSE1 | SkCpu::SSE2 | SkCpu::SSE3 | SkCpu::SSSE3 | SkCpu::SSE41); |
| #elif defined(SK_CPU_LIMIT_SSE2) |
| features &= (SkCpu::SSE1 | SkCpu::SSE2); |
| #endif |
| |
| #else |
| #if defined(SK_ARM_HAS_NEON) |
| features |= NEON; |
| #endif |
| |
| #if defined(SK_CPU_ARM64) |
| features |= NEON|NEON_FMA|VFP_FP16; |
| #endif |
| |
| #if defined(SK_ARM_HAS_CRC32) |
| features |= CRC32; |
| #endif |
| |
| #endif |
| return (features & mask) == mask; |
| } |
| |
| #endif//SkCpu_DEFINED |