diff options
Diffstat (limited to 'src/3rdparty/libwebp/src/dsp/cpu.c')
-rw-r--r-- | src/3rdparty/libwebp/src/dsp/cpu.c | 80 |
1 files changed, 80 insertions, 0 deletions
diff --git a/src/3rdparty/libwebp/src/dsp/cpu.c b/src/3rdparty/libwebp/src/dsp/cpu.c new file mode 100644 index 0000000..7a1f417 --- /dev/null +++ b/src/3rdparty/libwebp/src/dsp/cpu.c @@ -0,0 +1,80 @@ +// 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 + +//------------------------------------------------------------------------------ +// 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 + |