openh264/codec/common/cpu.h

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/*!
* \copy
* Copyright (c) 2009-2013, Cisco Systems
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* * Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
* COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*
*
* \file cpu.h
*
* \brief CPU feature compatibility detection
*
* \date 04/29/2009 Created
*
*************************************************************************************
*/
#if !defined(WELS_CPU_DETECTION_H__)
#define WELS_CPU_DETECTION_H__
#include "typedefs.h"
#include "cpu_core.h"
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#if defined(__cplusplus)
extern "C" {
#endif//__cplusplus
#if defined(X86_ASM)
/*
* cpuid support verify routine
* return 0 if cpuid is not supported by cpu
*/
int32_t WelsCPUIdVerify();
void_t WelsCPUId (uint32_t uiIndex, uint32_t* pFeatureA, uint32_t* pFeatureB, uint32_t* pFeatureC, uint32_t* pFeatureD);
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int32_t WelsCPUSupportAVX (uint32_t eax, uint32_t ecx);
int32_t WelsCPUSupportFMA (uint32_t eax, uint32_t ecx);
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void_t WelsEmms();
uint32_t WelsCPUFeatureDetect (int32_t* pNumberOfLogicProcessors);
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/*
* clear FPU registers states for potential float based calculation if support
*/
void WelsCPURestore (const uint32_t kuiCPU);
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#ifdef WIN64
void WelsXmmRegStore(void * src);
void WelsXmmRegLoad(void * src);
#endif
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#endif
void WelsXmmRegEmptyOp(void * pSrc);
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#if defined(__cplusplus)
}
#endif//__cplusplus
typedef void (*WelsXmmRegProtectFunc)(void * pSrc);
#ifdef WIN64
#define XMMREG_PROTECT_DECLARE(name) \
WelsXmmRegProtectFunc name##load;\
WelsXmmRegProtectFunc name##store;\
uint8_t name##Buffer[160];
#define XMMREG_PROTECT_INIT(name) \
{ \
uint32_t uiCpuFlag = WelsCPUFeatureDetect(NULL);\
if( uiCpuFlag & WELS_CPU_SSE2 ){\
name##load = WelsXmmRegLoad;\
name##store = WelsXmmRegStore; \
} else { \
name##load = WelsXmmRegEmptyOp; \
name##store = WelsXmmRegEmptyOp; \
} \
}
#define XMMREG_PROTECT_UNINIT(name) \
#define XMMREG_PROTECT_STORE(name) \
name##store(name##Buffer);
#define XMMREG_PROTECT_LOAD(name) \
name##load(name##Buffer);
#else
#define XMMREG_PROTECT_DECLARE(name)
#define XMMREG_PROTECT_INIT(name)
#define XMMREG_PROTECT_UNINIT(name)
#define XMMREG_PROTECT_STORE(name)
#define XMMREG_PROTECT_LOAD(name)
#endif
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#endif//WELS_CPU_DETECTION_H__