1 // Copyright 2011 Google Inc. All Rights Reserved. 2 // 3 // This code is licensed under the same terms as WebM: 4 // Software License Agreement: http://www.webmproject.org/license/software/ 5 // Additional IP Rights Grant: http://www.webmproject.org/license/additional/ 6 // ----------------------------------------------------------------------------- 7 // 8 // CPU detection 9 // 10 // Author: Christian Duvivier (cduvivier (at) google.com) 11 12 #include "./dsp.h" 13 14 //#if defined(__ANDROID__) 15 //#include <cpu-features.h> 16 //#endif 17 18 #if defined(__cplusplus) || defined(c_plusplus) 19 extern "C" { 20 #endif 21 22 //------------------------------------------------------------------------------ 23 // SSE2 detection. 24 // 25 26 // apple/darwin gcc-4.0.1 defines __PIC__, but not __pic__ with -fPIC. 27 #if (defined(__pic__) || defined(__PIC__)) && defined(__i386__) 28 static WEBP_INLINE void GetCPUInfo(int cpu_info[4], int info_type) { 29 __asm__ volatile ( 30 "mov %%ebx, %%edi\n" 31 "cpuid\n" 32 "xchg %%edi, %%ebx\n" 33 : "=a"(cpu_info[0]), "=D"(cpu_info[1]), "=c"(cpu_info[2]), "=d"(cpu_info[3]) 34 : "a"(info_type)); 35 } 36 #elif defined(__i386__) || defined(__x86_64__) 37 static WEBP_INLINE void GetCPUInfo(int cpu_info[4], int info_type) { 38 __asm__ volatile ( 39 "cpuid\n" 40 : "=a"(cpu_info[0]), "=b"(cpu_info[1]), "=c"(cpu_info[2]), "=d"(cpu_info[3]) 41 : "a"(info_type)); 42 } 43 #elif defined(WEBP_MSC_SSE2) 44 #define GetCPUInfo __cpuid 45 #endif 46 47 #if defined(__i386__) || defined(__x86_64__) || defined(WEBP_MSC_SSE2) 48 static int x86CPUInfo(CPUFeature feature) { 49 int cpu_info[4]; 50 GetCPUInfo(cpu_info, 1); 51 if (feature == kSSE2) { 52 return 0 != (cpu_info[3] & 0x04000000); 53 } 54 if (feature == kSSE3) { 55 return 0 != (cpu_info[2] & 0x00000001); 56 } 57 return 0; 58 } 59 VP8CPUInfo VP8GetCPUInfo = x86CPUInfo; 60 #elif defined(WEBP_ANDROID_NEON) 61 static int AndroidCPUInfo(CPUFeature feature) { 62 // const AndroidCpuFamily cpu_family = android_getCpuFamily(); 63 // const uint64_t cpu_features = android_getCpuFeatures(); 64 // if (feature == kNEON) { 65 // return (cpu_family == ANDROID_CPU_FAMILY_ARM && 66 // 0 != (cpu_features & ANDROID_CPU_ARM_FEATURE_NEON)); 67 // } 68 // return 0; 69 return 1; 70 } 71 VP8CPUInfo VP8GetCPUInfo = AndroidCPUInfo; 72 #elif defined(__ARM_NEON__) 73 // define a dummy function to enable turning off NEON at runtime by setting 74 // VP8DecGetCPUInfo = NULL 75 static int armCPUInfo(CPUFeature feature) { 76 (void)feature; 77 return 1; 78 } 79 VP8CPUInfo VP8GetCPUInfo = armCPUInfo; 80 #else 81 VP8CPUInfo VP8GetCPUInfo = NULL; 82 #endif 83 84 #if defined(__cplusplus) || defined(c_plusplus) 85 } // extern "C" 86 #endif 87
