mirror of
https://github.com/oxen-io/session-android.git
synced 2024-12-18 05:57:44 +00:00
73 lines
1.9 KiB
C++
73 lines
1.9 KiB
C++
|
/*
|
||
|
|
* Copyright (c) 2011 The WebRTC project authors. All Rights Reserved.
|
||
|
|
*
|
||
|
|
* Use of this source code is governed by a BSD-style license
|
||
|
|
* that can be found in the LICENSE 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.
|
||
|
|
*/
|
||
|
|
|
||
|
|
// Parts of this file derived from Chromium's base/cpu.cc.
|
||
|
|
|
||
|
|
#include "webrtc/system_wrappers/interface/cpu_features_wrapper.h"
|
||
|
|
|
||
|
|
#if defined(WEBRTC_ARCH_X86_FAMILY) && defined(_MSC_VER)
|
||
|
|
#include <intrin.h>
|
||
|
|
#endif
|
||
|
|
|
||
|
|
#include "webrtc/typedefs.h"
|
||
|
|
|
||
|
|
// No CPU feature is available => straight C path.
|
||
|
|
int GetCPUInfoNoASM(CPUFeature feature) {
|
||
|
|
(void)feature;
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
#if defined(WEBRTC_ARCH_X86_FAMILY)
|
||
|
|
#ifndef _MSC_VER
|
||
|
|
// Intrinsic for "cpuid".
|
||
|
|
#if defined(__pic__) && defined(__i386__)
|
||
|
|
static inline void __cpuid(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));
|
||
|
|
}
|
||
|
|
#else
|
||
|
|
static inline void __cpuid(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));
|
||
|
|
}
|
||
|
|
#endif
|
||
|
|
#endif // _MSC_VER
|
||
|
|
#endif // WEBRTC_ARCH_X86_FAMILY
|
||
|
|
|
||
|
|
#if defined(WEBRTC_ARCH_X86_FAMILY)
|
||
|
|
// Actual feature detection for x86.
|
||
|
|
static int GetCPUInfo(CPUFeature feature) {
|
||
|
|
int cpu_info[4];
|
||
|
|
__cpuid(cpu_info, 1);
|
||
|
|
if (feature == kSSE2) {
|
||
|
|
return 0 != (cpu_info[3] & 0x04000000);
|
||
|
|
}
|
||
|
|
if (feature == kSSE3) {
|
||
|
|
return 0 != (cpu_info[2] & 0x00000001);
|
||
|
|
}
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
#else
|
||
|
|
// Default to straight C for other platforms.
|
||
|
|
static int GetCPUInfo(CPUFeature feature) {
|
||
|
|
(void)feature;
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
#endif
|
||
|
|
|
||
|
|
WebRtc_CPUInfo WebRtc_GetCPUInfo = GetCPUInfo;
|
||
|
|
WebRtc_CPUInfo WebRtc_GetCPUInfoNoASM = GetCPUInfoNoASM;
|