arm_cpudetect.h (1622B)
1 /* 2 * Copyright (c) 2023, Alliance for Open Media. All rights reserved. 3 * 4 * This source code is subject to the terms of the BSD 2 Clause License and 5 * the Alliance for Open Media Patent License 1.0. If the BSD 2 Clause License 6 * was not distributed with this source code in the LICENSE file, you can 7 * obtain it at www.aomedia.org/license/software. If the Alliance for Open 8 * Media Patent License 1.0 was not distributed with this source code in the 9 * PATENTS file, you can obtain it at www.aomedia.org/license/patent. 10 */ 11 12 #include "aom_ports/arm.h" 13 #include "config/aom_config.h" 14 15 #include <stdbool.h> 16 #include <stdlib.h> 17 #include <string.h> 18 19 #if defined(_WIN32) 20 #undef WIN32_LEAN_AND_MEAN 21 #define WIN32_LEAN_AND_MEAN 22 #undef WIN32_EXTRA_LEAN 23 #define WIN32_EXTRA_LEAN 24 #include <windows.h> 25 #endif 26 27 #ifdef WINAPI_FAMILY 28 #include <winapifamily.h> 29 #if !WINAPI_FAMILY_PARTITION(WINAPI_PARTITION_DESKTOP) 30 #define getenv(x) NULL 31 #endif 32 #endif 33 34 #if defined(__ANDROID__) && (__ANDROID_API__ < 18) 35 #define AOM_USE_ANDROID_CPU_FEATURES 1 36 // Use getauxval() when targeting (64-bit) Android with API level >= 18. 37 // getauxval() is supported since Android API level 18 (Android 4.3.) 38 // First Android version with 64-bit support was Android 5.x (API level 21). 39 #include <cpu-features.h> 40 #endif 41 42 static bool arm_cpu_env_flags(int *flags) { 43 const char *env = getenv("AOM_SIMD_CAPS"); 44 if (env && *env) { 45 *flags = (int)strtol(env, NULL, 0); 46 return true; 47 } 48 return false; 49 } 50 51 static int arm_cpu_env_mask(void) { 52 const char *env = getenv("AOM_SIMD_CAPS_MASK"); 53 return env && *env ? (int)strtol(env, NULL, 0) : ~0; 54 }