| // Copyright 2011 Google Inc. All Rights Reserved. |
| // |
| // Use of this source code is governed by a BSD-style license |
| // that can be found in the COPYING file in the root of the source |
| // tree. An additional intellectual property rights grant can be found |
| // in the file PATENTS. All contributing project authors may |
| // be found in the AUTHORS file in the root of the source tree. |
| // ----------------------------------------------------------------------------- |
| // |
| // CPU detection |
| // |
| // Author: Christian Duvivier (cduvivier@google.com) |
| |
| #include "./dsp.h" |
| |
| #if defined(__ANDROID__) |
| #include <cpu-features.h> |
| #endif |
| |
| #if defined(__cplusplus) || defined(c_plusplus) |
| extern "C" { |
| #endif |
| |
| //------------------------------------------------------------------------------ |
| // SSE2 detection. |
| // |
| |
| // apple/darwin gcc-4.0.1 defines __PIC__, but not __pic__ with -fPIC. |
| #if (defined(__pic__) || defined(__PIC__)) && defined(__i386__) |
| static WEBP_INLINE void GetCPUInfo(int cpu_info[4], int info_type) { |
| __asm__ volatile ( |
| "mov %%ebx, %%edi\n" |
| "cpuid\n" |
| "xchg %%edi, %%ebx\n" |
| : "=a"(cpu_info[0]), "=D"(cpu_info[1]), "=c"(cpu_info[2]), "=d"(cpu_info[3]) |
| : "a"(info_type)); |
| } |
| #elif defined(__i386__) || defined(__x86_64__) |
| static WEBP_INLINE void GetCPUInfo(int cpu_info[4], int info_type) { |
| __asm__ volatile ( |
| "cpuid\n" |
| : "=a"(cpu_info[0]), "=b"(cpu_info[1]), "=c"(cpu_info[2]), "=d"(cpu_info[3]) |
| : "a"(info_type)); |
| } |
| #elif defined(WEBP_MSC_SSE2) |
| #define GetCPUInfo __cpuid |
| #endif |
| |
| #if defined(__i386__) || defined(__x86_64__) || defined(WEBP_MSC_SSE2) |
| static int x86CPUInfo(CPUFeature feature) { |
| int cpu_info[4]; |
| GetCPUInfo(cpu_info, 1); |
| if (feature == kSSE2) { |
| return 0 != (cpu_info[3] & 0x04000000); |
| } |
| if (feature == kSSE3) { |
| return 0 != (cpu_info[2] & 0x00000001); |
| } |
| return 0; |
| } |
| VP8CPUInfo VP8GetCPUInfo = x86CPUInfo; |
| #elif defined(WEBP_ANDROID_NEON) |
| static int AndroidCPUInfo(CPUFeature feature) { |
| const AndroidCpuFamily cpu_family = android_getCpuFamily(); |
| const uint64_t cpu_features = android_getCpuFeatures(); |
| if (feature == kNEON) { |
| return (cpu_family == ANDROID_CPU_FAMILY_ARM && |
| 0 != (cpu_features & ANDROID_CPU_ARM_FEATURE_NEON)); |
| } |
| return 0; |
| } |
| VP8CPUInfo VP8GetCPUInfo = AndroidCPUInfo; |
| #elif defined(__ARM_NEON__) |
| // define a dummy function to enable turning off NEON at runtime by setting |
| // VP8DecGetCPUInfo = NULL |
| static int armCPUInfo(CPUFeature feature) { |
| (void)feature; |
| return 1; |
| } |
| VP8CPUInfo VP8GetCPUInfo = armCPUInfo; |
| #else |
| VP8CPUInfo VP8GetCPUInfo = NULL; |
| #endif |
| |
| #if defined(__cplusplus) || defined(c_plusplus) |
| } // extern "C" |
| #endif |
