| /* |
| * Copyright 2016 Google Inc. |
| * |
| * Use of this source code is governed by a BSD-style license that can be |
| * found in the LICENSE file. |
| */ |
| |
| #include "SkCpu.h" |
| #include "SkOnce.h" |
| |
| #if defined(SK_CPU_X86) |
| #if defined(SK_BUILD_FOR_WIN32) |
| #include <intrin.h> |
| static void cpuid (uint32_t abcd[4]) { __cpuid ((int*)abcd, 1); } |
| static void cpuid7(uint32_t abcd[4]) { __cpuidex((int*)abcd, 7, 0); } |
| static uint64_t xgetbv(uint32_t xcr) { return _xgetbv(xcr); } |
| #else |
| #include <cpuid.h> |
| #if !defined(__cpuid_count) // Old Mac Clang doesn't have this defined. |
| #define __cpuid_count(eax, ecx, a, b, c, d) \ |
| __asm__("cpuid" : "=a"(a), "=b"(b), "=c"(c), "=d"(d) : "0"(eax), "2"(ecx)) |
| #endif |
| static void cpuid (uint32_t abcd[4]) { __get_cpuid(1, abcd+0, abcd+1, abcd+2, abcd+3); } |
| static void cpuid7(uint32_t abcd[4]) { |
| __cpuid_count(7, 0, abcd[0], abcd[1], abcd[2], abcd[3]); |
| } |
| static uint64_t xgetbv(uint32_t xcr) { |
| uint32_t eax, edx; |
| __asm__ __volatile__ ( "xgetbv" : "=a"(eax), "=d"(edx) : "c"(xcr)); |
| return (uint64_t)(edx) << 32 | eax; |
| } |
| #endif |
| |
| static uint32_t read_cpu_features() { |
| uint32_t features = 0; |
| uint32_t abcd[4] = {0,0,0,0}; |
| |
| // You might want to refer to http://www.sandpile.org/x86/cpuid.htm |
| |
| cpuid(abcd); |
| if (abcd[3] & (1<<25)) { features |= SkCpu:: SSE1; } |
| if (abcd[3] & (1<<26)) { features |= SkCpu:: SSE2; } |
| if (abcd[2] & (1<< 0)) { features |= SkCpu:: SSE3; } |
| if (abcd[2] & (1<< 9)) { features |= SkCpu::SSSE3; } |
| if (abcd[2] & (1<<19)) { features |= SkCpu::SSE41; } |
| if (abcd[2] & (1<<20)) { features |= SkCpu::SSE42; } |
| |
| if ((abcd[2] & (3<<26)) == (3<<26) && (xgetbv(0) & 6) == 6) { // XSAVE + OSXSAVE |
| if (abcd[2] & (1<<28)) { features |= SkCpu:: AVX; } |
| if (abcd[2] & (1<<29)) { features |= SkCpu::F16C; } |
| if (abcd[2] & (1<<12)) { features |= SkCpu:: FMA; } |
| |
| cpuid7(abcd); |
| if (abcd[1] & (1<<5)) { features |= SkCpu::AVX2; } |
| if (abcd[1] & (1<<3)) { features |= SkCpu::BMI1; } |
| if (abcd[1] & (1<<8)) { features |= SkCpu::BMI2; } |
| } |
| return features; |
| } |
| |
| #elif defined(SK_CPU_ARM32) && \ |
| defined(SK_BUILD_FOR_ANDROID) && \ |
| !defined(SK_BUILD_FOR_ANDROID_FRAMEWORK) |
| #include "cpu-features.h" |
| |
| static uint32_t read_cpu_features() { |
| uint32_t features = 0; |
| |
| uint64_t android_features = android_getCpuFeatures(); |
| if (android_features & ANDROID_CPU_ARM_FEATURE_NEON ) { features |= SkCpu::NEON ; } |
| if (android_features & ANDROID_CPU_ARM_FEATURE_NEON_FMA) { features |= SkCpu::NEON_FMA; } |
| if (android_features & ANDROID_CPU_ARM_FEATURE_VFP_FP16) { features |= SkCpu::VFP_FP16; } |
| return features; |
| } |
| |
| #elif defined(SK_CPU_ARM64) && \ |
| defined(SK_BUILD_FOR_ANDROID) && \ |
| !defined(SK_BUILD_FOR_ANDROID_FRAMEWORK) |
| #include "cpu-features.h" |
| |
| static uint32_t read_cpu_features() { |
| uint32_t features = 0; |
| |
| uint64_t android_features = android_getCpuFeatures(); |
| if (android_features & ANDROID_CPU_ARM64_FEATURE_CRC32) { features |= SkCpu::CRC32; } |
| return features; |
| } |
| |
| #else |
| static uint32_t read_cpu_features() { |
| return 0; |
| } |
| |
| #endif |
| |
| uint32_t SkCpu::gCachedFeatures = 0; |
| |
| void SkCpu::CacheRuntimeFeatures() { |
| static SkOnce once; |
| once([] { gCachedFeatures = read_cpu_features(); }); |
| } |