Shri Borde | 7cd8149 | 2011-11-02 13:20:24 -0700 | [diff] [blame] | 1 | /* |
Hendrik Dahlkamp | 33cfdeb | 2013-01-23 18:27:37 -0800 | [diff] [blame] | 2 | * Copyright 2011 The LibYuv Project Authors. All rights reserved. |
Shri Borde | 7cd8149 | 2011-11-02 13:20:24 -0700 | [diff] [blame] | 3 | * |
| 4 | * Use of this source code is governed by a BSD-style license |
| 5 | * that can be found in the LICENSE file in the root of the source |
| 6 | * tree. An additional intellectual property rights grant can be found |
Hangyu Kuang | f047e7c | 2016-07-06 14:21:45 -0700 | [diff] [blame] | 7 | * in the file PATENTS. All contributing project authors may |
Shri Borde | 7cd8149 | 2011-11-02 13:20:24 -0700 | [diff] [blame] | 8 | * be found in the AUTHORS file in the root of the source tree. |
| 9 | */ |
| 10 | |
| 11 | #include "libyuv/cpu_id.h" |
Shri Borde | 7cd8149 | 2011-11-02 13:20:24 -0700 | [diff] [blame] | 12 | |
Hangyu Kuang | f047e7c | 2016-07-06 14:21:45 -0700 | [diff] [blame] | 13 | #if defined(_MSC_VER) |
| 14 | #include <intrin.h> // For __cpuidex() |
Shri Borde | 7cd8149 | 2011-11-02 13:20:24 -0700 | [diff] [blame] | 15 | #endif |
Hangyu Kuang | f047e7c | 2016-07-06 14:21:45 -0700 | [diff] [blame] | 16 | #if !defined(__pnacl__) && !defined(__CLR_VER) && \ |
| 17 | !defined(__native_client__) && (defined(_M_IX86) || defined(_M_X64)) && \ |
| 18 | defined(_MSC_FULL_VER) && (_MSC_FULL_VER >= 160040219) |
Hendrik Dahlkamp | 33cfdeb | 2013-01-23 18:27:37 -0800 | [diff] [blame] | 19 | #include <immintrin.h> // For _xgetbv() |
| 20 | #endif |
| 21 | |
Hangyu Kuang | f047e7c | 2016-07-06 14:21:45 -0700 | [diff] [blame] | 22 | #if !defined(__native_client__) |
Hendrik Dahlkamp | 33cfdeb | 2013-01-23 18:27:37 -0800 | [diff] [blame] | 23 | #include <stdlib.h> // For getenv() |
Hangyu Kuang | f047e7c | 2016-07-06 14:21:45 -0700 | [diff] [blame] | 24 | #endif |
Hendrik Dahlkamp | 33cfdeb | 2013-01-23 18:27:37 -0800 | [diff] [blame] | 25 | |
| 26 | // For ArmCpuCaps() but unittested on all platforms |
| 27 | #include <stdio.h> |
| 28 | #include <string.h> |
| 29 | |
| 30 | #include "libyuv/basic_types.h" // For CPU_X86 |
Shri Borde | 7cd8149 | 2011-11-02 13:20:24 -0700 | [diff] [blame] | 31 | |
Hendrik Dahlkamp | 33cfdeb | 2013-01-23 18:27:37 -0800 | [diff] [blame] | 32 | #ifdef __cplusplus |
Shri Borde | 7cd8149 | 2011-11-02 13:20:24 -0700 | [diff] [blame] | 33 | namespace libyuv { |
Hendrik Dahlkamp | 33cfdeb | 2013-01-23 18:27:37 -0800 | [diff] [blame] | 34 | extern "C" { |
| 35 | #endif |
| 36 | |
Hangyu Kuang | f047e7c | 2016-07-06 14:21:45 -0700 | [diff] [blame] | 37 | // For functions that use the stack and have runtime checks for overflow, |
| 38 | // use SAFEBUFFERS to avoid additional check. |
| 39 | #if defined(_MSC_FULL_VER) && (_MSC_FULL_VER >= 160040219) && \ |
| 40 | !defined(__clang__) |
| 41 | #define SAFEBUFFERS __declspec(safebuffers) |
Hendrik Dahlkamp | 33cfdeb | 2013-01-23 18:27:37 -0800 | [diff] [blame] | 42 | #else |
Hangyu Kuang | f047e7c | 2016-07-06 14:21:45 -0700 | [diff] [blame] | 43 | #define SAFEBUFFERS |
| 44 | #endif |
| 45 | |
| 46 | // Low level cpuid for X86. |
| 47 | #if (defined(_M_IX86) || defined(_M_X64) || \ |
| 48 | defined(__i386__) || defined(__x86_64__)) && \ |
| 49 | !defined(__pnacl__) && !defined(__CLR_VER) |
Hendrik Dahlkamp | 33cfdeb | 2013-01-23 18:27:37 -0800 | [diff] [blame] | 50 | LIBYUV_API |
Hangyu Kuang | f047e7c | 2016-07-06 14:21:45 -0700 | [diff] [blame] | 51 | void CpuId(uint32 info_eax, uint32 info_ecx, uint32* cpu_info) { |
| 52 | #if defined(_MSC_VER) |
| 53 | // Visual C version uses intrinsic or inline x86 assembly. |
| 54 | #if defined(_MSC_FULL_VER) && (_MSC_FULL_VER >= 160040219) |
| 55 | __cpuidex((int*)(cpu_info), info_eax, info_ecx); |
| 56 | #elif defined(_M_IX86) |
| 57 | __asm { |
| 58 | mov eax, info_eax |
| 59 | mov ecx, info_ecx |
| 60 | mov edi, cpu_info |
| 61 | cpuid |
| 62 | mov [edi], eax |
| 63 | mov [edi + 4], ebx |
| 64 | mov [edi + 8], ecx |
| 65 | mov [edi + 12], edx |
| 66 | } |
| 67 | #else // Visual C but not x86 |
| 68 | if (info_ecx == 0) { |
| 69 | __cpuid((int*)(cpu_info), info_eax); |
| 70 | } else { |
| 71 | cpu_info[3] = cpu_info[2] = cpu_info[1] = cpu_info[0] = 0; |
| 72 | } |
| 73 | #endif |
| 74 | // GCC version uses inline x86 assembly. |
| 75 | #else // defined(_MSC_VER) |
| 76 | uint32 info_ebx, info_edx; |
| 77 | asm volatile ( |
| 78 | #if defined( __i386__) && defined(__PIC__) |
| 79 | // Preserve ebx for fpic 32 bit. |
| 80 | "mov %%ebx, %%edi \n" |
| 81 | "cpuid \n" |
| 82 | "xchg %%edi, %%ebx \n" |
| 83 | : "=D" (info_ebx), |
| 84 | #else |
| 85 | "cpuid \n" |
| 86 | : "=b" (info_ebx), |
| 87 | #endif // defined( __i386__) && defined(__PIC__) |
| 88 | "+a" (info_eax), "+c" (info_ecx), "=d" (info_edx)); |
| 89 | cpu_info[0] = info_eax; |
| 90 | cpu_info[1] = info_ebx; |
| 91 | cpu_info[2] = info_ecx; |
| 92 | cpu_info[3] = info_edx; |
| 93 | #endif // defined(_MSC_VER) |
| 94 | } |
| 95 | #else // (defined(_M_IX86) || defined(_M_X64) ... |
| 96 | LIBYUV_API |
| 97 | void CpuId(uint32 eax, uint32 ecx, uint32* cpu_info) { |
Hendrik Dahlkamp | 33cfdeb | 2013-01-23 18:27:37 -0800 | [diff] [blame] | 98 | cpu_info[0] = cpu_info[1] = cpu_info[2] = cpu_info[3] = 0; |
| 99 | } |
| 100 | #endif |
| 101 | |
Hangyu Kuang | f047e7c | 2016-07-06 14:21:45 -0700 | [diff] [blame] | 102 | // For VS2010 and earlier emit can be used: |
| 103 | // _asm _emit 0x0f _asm _emit 0x01 _asm _emit 0xd0 // For VS2010 and earlier. |
| 104 | // __asm { |
| 105 | // xor ecx, ecx // xcr 0 |
| 106 | // xgetbv |
| 107 | // mov xcr0, eax |
| 108 | // } |
| 109 | // For VS2013 and earlier 32 bit, the _xgetbv(0) optimizer produces bad code. |
| 110 | // https://code.google.com/p/libyuv/issues/detail?id=529 |
| 111 | #if defined(_M_IX86) && (_MSC_VER < 1900) |
| 112 | #pragma optimize("g", off) |
Hendrik Dahlkamp | 33cfdeb | 2013-01-23 18:27:37 -0800 | [diff] [blame] | 113 | #endif |
Hangyu Kuang | f047e7c | 2016-07-06 14:21:45 -0700 | [diff] [blame] | 114 | #if (defined(_M_IX86) || defined(_M_X64) || \ |
| 115 | defined(__i386__) || defined(__x86_64__)) && \ |
| 116 | !defined(__pnacl__) && !defined(__CLR_VER) && !defined(__native_client__) |
| 117 | #define HAS_XGETBV |
| 118 | // X86 CPUs have xgetbv to detect OS saves high parts of ymm registers. |
| 119 | int GetXCR0() { |
| 120 | uint32 xcr0 = 0u; |
| 121 | #if defined(_MSC_FULL_VER) && (_MSC_FULL_VER >= 160040219) |
| 122 | xcr0 = (uint32)(_xgetbv(0)); // VS2010 SP1 required. |
| 123 | #elif defined(__i386__) || defined(__x86_64__) |
| 124 | asm(".byte 0x0f, 0x01, 0xd0" : "=a" (xcr0) : "c" (0) : "%edx"); |
| 125 | #endif // defined(__i386__) || defined(__x86_64__) |
| 126 | return xcr0; |
| 127 | } |
| 128 | #endif // defined(_M_IX86) || defined(_M_X64) .. |
| 129 | // Return optimization to previous setting. |
| 130 | #if defined(_M_IX86) && (_MSC_VER < 1900) |
| 131 | #pragma optimize("g", on) |
Hendrik Dahlkamp | 33cfdeb | 2013-01-23 18:27:37 -0800 | [diff] [blame] | 132 | #endif |
| 133 | |
| 134 | // based on libvpx arm_cpudetect.c |
| 135 | // For Arm, but public to allow testing on any CPU |
Hangyu Kuang | f047e7c | 2016-07-06 14:21:45 -0700 | [diff] [blame] | 136 | LIBYUV_API SAFEBUFFERS |
Hendrik Dahlkamp | 33cfdeb | 2013-01-23 18:27:37 -0800 | [diff] [blame] | 137 | int ArmCpuCaps(const char* cpuinfo_name) { |
Hangyu Kuang | f047e7c | 2016-07-06 14:21:45 -0700 | [diff] [blame] | 138 | char cpuinfo_line[512]; |
| 139 | FILE* f = fopen(cpuinfo_name, "r"); |
| 140 | if (!f) { |
| 141 | // Assume Neon if /proc/cpuinfo is unavailable. |
| 142 | // This will occur for Chrome sandbox for Pepper or Render process. |
| 143 | return kCpuHasNEON; |
| 144 | } |
| 145 | while (fgets(cpuinfo_line, sizeof(cpuinfo_line) - 1, f)) { |
| 146 | if (memcmp(cpuinfo_line, "Features", 8) == 0) { |
| 147 | char* p = strstr(cpuinfo_line, " neon"); |
| 148 | if (p && (p[5] == ' ' || p[5] == '\n')) { |
| 149 | fclose(f); |
| 150 | return kCpuHasNEON; |
| 151 | } |
| 152 | // aarch64 uses asimd for Neon. |
| 153 | p = strstr(cpuinfo_line, " asimd"); |
| 154 | if (p && (p[6] == ' ' || p[6] == '\n')) { |
| 155 | fclose(f); |
| 156 | return kCpuHasNEON; |
Hendrik Dahlkamp | 33cfdeb | 2013-01-23 18:27:37 -0800 | [diff] [blame] | 157 | } |
| 158 | } |
Hendrik Dahlkamp | 33cfdeb | 2013-01-23 18:27:37 -0800 | [diff] [blame] | 159 | } |
Hangyu Kuang | f047e7c | 2016-07-06 14:21:45 -0700 | [diff] [blame] | 160 | fclose(f); |
| 161 | return 0; |
Hendrik Dahlkamp | 33cfdeb | 2013-01-23 18:27:37 -0800 | [diff] [blame] | 162 | } |
Shri Borde | 7cd8149 | 2011-11-02 13:20:24 -0700 | [diff] [blame] | 163 | |
| 164 | // CPU detect function for SIMD instruction sets. |
Hendrik Dahlkamp | 33cfdeb | 2013-01-23 18:27:37 -0800 | [diff] [blame] | 165 | LIBYUV_API |
Hangyu Kuang | f047e7c | 2016-07-06 14:21:45 -0700 | [diff] [blame] | 166 | int cpu_info_ = 0; // cpu_info is not initialized yet. |
Shri Borde | 7cd8149 | 2011-11-02 13:20:24 -0700 | [diff] [blame] | 167 | |
Hendrik Dahlkamp | 33cfdeb | 2013-01-23 18:27:37 -0800 | [diff] [blame] | 168 | // Test environment variable for disabling CPU features. Any non-zero value |
| 169 | // to disable. Zero ignored to make it easy to set the variable on/off. |
Hangyu Kuang | f047e7c | 2016-07-06 14:21:45 -0700 | [diff] [blame] | 170 | #if !defined(__native_client__) && !defined(_M_ARM) |
| 171 | |
| 172 | static LIBYUV_BOOL TestEnv(const char* name) { |
Hendrik Dahlkamp | 33cfdeb | 2013-01-23 18:27:37 -0800 | [diff] [blame] | 173 | const char* var = getenv(name); |
| 174 | if (var) { |
| 175 | if (var[0] != '0') { |
Hangyu Kuang | f047e7c | 2016-07-06 14:21:45 -0700 | [diff] [blame] | 176 | return LIBYUV_TRUE; |
Hendrik Dahlkamp | 33cfdeb | 2013-01-23 18:27:37 -0800 | [diff] [blame] | 177 | } |
| 178 | } |
Hangyu Kuang | f047e7c | 2016-07-06 14:21:45 -0700 | [diff] [blame] | 179 | return LIBYUV_FALSE; |
Hendrik Dahlkamp | 33cfdeb | 2013-01-23 18:27:37 -0800 | [diff] [blame] | 180 | } |
Hangyu Kuang | f047e7c | 2016-07-06 14:21:45 -0700 | [diff] [blame] | 181 | #else // nacl does not support getenv(). |
| 182 | static LIBYUV_BOOL TestEnv(const char*) { |
| 183 | return LIBYUV_FALSE; |
| 184 | } |
| 185 | #endif |
Hendrik Dahlkamp | 33cfdeb | 2013-01-23 18:27:37 -0800 | [diff] [blame] | 186 | |
Hangyu Kuang | f047e7c | 2016-07-06 14:21:45 -0700 | [diff] [blame] | 187 | LIBYUV_API SAFEBUFFERS |
Hendrik Dahlkamp | 33cfdeb | 2013-01-23 18:27:37 -0800 | [diff] [blame] | 188 | int InitCpuFlags(void) { |
Hangyu Kuang | f047e7c | 2016-07-06 14:21:45 -0700 | [diff] [blame] | 189 | // TODO(fbarchard): swap kCpuInit logic so 0 means uninitialized. |
| 190 | int cpu_info = 0; |
| 191 | #if !defined(__pnacl__) && !defined(__CLR_VER) && defined(CPU_X86) |
| 192 | uint32 cpu_info0[4] = { 0, 0, 0, 0 }; |
| 193 | uint32 cpu_info1[4] = { 0, 0, 0, 0 }; |
| 194 | uint32 cpu_info7[4] = { 0, 0, 0, 0 }; |
| 195 | CpuId(0, 0, cpu_info0); |
| 196 | CpuId(1, 0, cpu_info1); |
| 197 | if (cpu_info0[0] >= 7) { |
| 198 | CpuId(7, 0, cpu_info7); |
| 199 | } |
| 200 | cpu_info = ((cpu_info1[3] & 0x04000000) ? kCpuHasSSE2 : 0) | |
| 201 | ((cpu_info1[2] & 0x00000200) ? kCpuHasSSSE3 : 0) | |
| 202 | ((cpu_info1[2] & 0x00080000) ? kCpuHasSSE41 : 0) | |
| 203 | ((cpu_info1[2] & 0x00100000) ? kCpuHasSSE42 : 0) | |
| 204 | ((cpu_info7[1] & 0x00000200) ? kCpuHasERMS : 0) | |
| 205 | ((cpu_info1[2] & 0x00001000) ? kCpuHasFMA3 : 0) | |
| 206 | kCpuHasX86; |
| 207 | |
Hendrik Dahlkamp | 33cfdeb | 2013-01-23 18:27:37 -0800 | [diff] [blame] | 208 | #ifdef HAS_XGETBV |
Hangyu Kuang | f047e7c | 2016-07-06 14:21:45 -0700 | [diff] [blame] | 209 | // AVX requires CPU has AVX, XSAVE and OSXSave for xgetbv |
| 210 | if (((cpu_info1[2] & 0x1c000000) == 0x1c000000) && // AVX and OSXSave |
| 211 | ((GetXCR0() & 6) == 6)) { // Test OS saves YMM registers |
| 212 | cpu_info |= ((cpu_info7[1] & 0x00000020) ? kCpuHasAVX2 : 0) | kCpuHasAVX; |
| 213 | |
| 214 | // Detect AVX512bw |
| 215 | if ((GetXCR0() & 0xe0) == 0xe0) { |
| 216 | cpu_info |= (cpu_info7[1] & 0x40000000) ? kCpuHasAVX3 : 0; |
Hendrik Dahlkamp | 33cfdeb | 2013-01-23 18:27:37 -0800 | [diff] [blame] | 217 | } |
| 218 | } |
| 219 | #endif |
Hangyu Kuang | f047e7c | 2016-07-06 14:21:45 -0700 | [diff] [blame] | 220 | |
| 221 | // Environment variable overrides for testing. |
Hendrik Dahlkamp | 33cfdeb | 2013-01-23 18:27:37 -0800 | [diff] [blame] | 222 | if (TestEnv("LIBYUV_DISABLE_X86")) { |
Hangyu Kuang | f047e7c | 2016-07-06 14:21:45 -0700 | [diff] [blame] | 223 | cpu_info &= ~kCpuHasX86; |
Hendrik Dahlkamp | 33cfdeb | 2013-01-23 18:27:37 -0800 | [diff] [blame] | 224 | } |
| 225 | if (TestEnv("LIBYUV_DISABLE_SSE2")) { |
Hangyu Kuang | f047e7c | 2016-07-06 14:21:45 -0700 | [diff] [blame] | 226 | cpu_info &= ~kCpuHasSSE2; |
Hendrik Dahlkamp | 33cfdeb | 2013-01-23 18:27:37 -0800 | [diff] [blame] | 227 | } |
| 228 | if (TestEnv("LIBYUV_DISABLE_SSSE3")) { |
Hangyu Kuang | f047e7c | 2016-07-06 14:21:45 -0700 | [diff] [blame] | 229 | cpu_info &= ~kCpuHasSSSE3; |
Hendrik Dahlkamp | 33cfdeb | 2013-01-23 18:27:37 -0800 | [diff] [blame] | 230 | } |
| 231 | if (TestEnv("LIBYUV_DISABLE_SSE41")) { |
Hangyu Kuang | f047e7c | 2016-07-06 14:21:45 -0700 | [diff] [blame] | 232 | cpu_info &= ~kCpuHasSSE41; |
Hendrik Dahlkamp | 33cfdeb | 2013-01-23 18:27:37 -0800 | [diff] [blame] | 233 | } |
| 234 | if (TestEnv("LIBYUV_DISABLE_SSE42")) { |
Hangyu Kuang | f047e7c | 2016-07-06 14:21:45 -0700 | [diff] [blame] | 235 | cpu_info &= ~kCpuHasSSE42; |
Hendrik Dahlkamp | 33cfdeb | 2013-01-23 18:27:37 -0800 | [diff] [blame] | 236 | } |
| 237 | if (TestEnv("LIBYUV_DISABLE_AVX")) { |
Hangyu Kuang | f047e7c | 2016-07-06 14:21:45 -0700 | [diff] [blame] | 238 | cpu_info &= ~kCpuHasAVX; |
Hendrik Dahlkamp | 33cfdeb | 2013-01-23 18:27:37 -0800 | [diff] [blame] | 239 | } |
| 240 | if (TestEnv("LIBYUV_DISABLE_AVX2")) { |
Hangyu Kuang | f047e7c | 2016-07-06 14:21:45 -0700 | [diff] [blame] | 241 | cpu_info &= ~kCpuHasAVX2; |
Hendrik Dahlkamp | 33cfdeb | 2013-01-23 18:27:37 -0800 | [diff] [blame] | 242 | } |
Hangyu Kuang | f047e7c | 2016-07-06 14:21:45 -0700 | [diff] [blame] | 243 | if (TestEnv("LIBYUV_DISABLE_ERMS")) { |
| 244 | cpu_info &= ~kCpuHasERMS; |
Hendrik Dahlkamp | 33cfdeb | 2013-01-23 18:27:37 -0800 | [diff] [blame] | 245 | } |
Hangyu Kuang | f047e7c | 2016-07-06 14:21:45 -0700 | [diff] [blame] | 246 | if (TestEnv("LIBYUV_DISABLE_FMA3")) { |
| 247 | cpu_info &= ~kCpuHasFMA3; |
| 248 | } |
| 249 | if (TestEnv("LIBYUV_DISABLE_AVX3")) { |
| 250 | cpu_info &= ~kCpuHasAVX3; |
| 251 | } |
Shri Borde | 7cd8149 | 2011-11-02 13:20:24 -0700 | [diff] [blame] | 252 | #endif |
Hangyu Kuang | f047e7c | 2016-07-06 14:21:45 -0700 | [diff] [blame] | 253 | #if defined(__mips__) && defined(__linux__) |
| 254 | #if defined(__mips_dspr2) |
| 255 | cpu_info |= kCpuHasDSPR2; |
| 256 | #endif |
| 257 | cpu_info |= kCpuHasMIPS; |
| 258 | if (getenv("LIBYUV_DISABLE_DSPR2")) { |
| 259 | cpu_info &= ~kCpuHasDSPR2; |
Hendrik Dahlkamp | 33cfdeb | 2013-01-23 18:27:37 -0800 | [diff] [blame] | 260 | } |
Hangyu Kuang | f047e7c | 2016-07-06 14:21:45 -0700 | [diff] [blame] | 261 | #endif |
| 262 | #if defined(__arm__) || defined(__aarch64__) |
| 263 | // gcc -mfpu=neon defines __ARM_NEON__ |
| 264 | // __ARM_NEON__ generates code that requires Neon. NaCL also requires Neon. |
| 265 | // For Linux, /proc/cpuinfo can be tested but without that assume Neon. |
| 266 | #if defined(__ARM_NEON__) || defined(__native_client__) || !defined(__linux__) |
| 267 | cpu_info = kCpuHasNEON; |
| 268 | // For aarch64(arm64), /proc/cpuinfo's feature is not complete, e.g. no neon |
| 269 | // flag in it. |
| 270 | // So for aarch64, neon enabling is hard coded here. |
| 271 | #endif |
| 272 | #if defined(__aarch64__) |
| 273 | cpu_info = kCpuHasNEON; |
| 274 | #else |
| 275 | // Linux arm parse text file for neon detect. |
| 276 | cpu_info = ArmCpuCaps("/proc/cpuinfo"); |
| 277 | #endif |
| 278 | cpu_info |= kCpuHasARM; |
| 279 | if (TestEnv("LIBYUV_DISABLE_NEON")) { |
| 280 | cpu_info &= ~kCpuHasNEON; |
Hendrik Dahlkamp | 33cfdeb | 2013-01-23 18:27:37 -0800 | [diff] [blame] | 281 | } |
| 282 | #endif // __arm__ |
Hangyu Kuang | f047e7c | 2016-07-06 14:21:45 -0700 | [diff] [blame] | 283 | if (TestEnv("LIBYUV_DISABLE_ASM")) { |
| 284 | cpu_info = 0; |
| 285 | } |
| 286 | cpu_info |= kCpuInitialized; |
| 287 | cpu_info_ = cpu_info; |
| 288 | return cpu_info; |
Shri Borde | 7cd8149 | 2011-11-02 13:20:24 -0700 | [diff] [blame] | 289 | } |
| 290 | |
Hangyu Kuang | f047e7c | 2016-07-06 14:21:45 -0700 | [diff] [blame] | 291 | // Note that use of this function is not thread safe. |
Hendrik Dahlkamp | 33cfdeb | 2013-01-23 18:27:37 -0800 | [diff] [blame] | 292 | LIBYUV_API |
Shri Borde | 7cd8149 | 2011-11-02 13:20:24 -0700 | [diff] [blame] | 293 | void MaskCpuFlags(int enable_flags) { |
Hangyu Kuang | f047e7c | 2016-07-06 14:21:45 -0700 | [diff] [blame] | 294 | cpu_info_ = InitCpuFlags() & enable_flags; |
Shri Borde | 7cd8149 | 2011-11-02 13:20:24 -0700 | [diff] [blame] | 295 | } |
| 296 | |
Hendrik Dahlkamp | 33cfdeb | 2013-01-23 18:27:37 -0800 | [diff] [blame] | 297 | #ifdef __cplusplus |
| 298 | } // extern "C" |
Shri Borde | 7cd8149 | 2011-11-02 13:20:24 -0700 | [diff] [blame] | 299 | } // namespace libyuv |
Hendrik Dahlkamp | 33cfdeb | 2013-01-23 18:27:37 -0800 | [diff] [blame] | 300 | #endif |