9cf34e7615
The caller of the function should not need to know exactly which implementation of it is being used. For the variants that don't support detecting the number of cores, the pNumberOfLogicProcessors parameter can be left untouched and the caller will use a higher level API for finding it out. This simplifies all the calling code, and simplifies adding more implementations of cpu feature detection.
127 lines
3.6 KiB
C
127 lines
3.6 KiB
C
/*!
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* \copy
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* Copyright (c) 2009-2013, Cisco Systems
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* * Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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*
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* * Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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* COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
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* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
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* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*
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*
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* \file cpu.h
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*
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* \brief CPU feature compatibility detection
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*
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* \date 04/29/2009 Created
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*
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*************************************************************************************
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*/
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#if !defined(WELS_CPU_DETECTION_H__)
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#define WELS_CPU_DETECTION_H__
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#include "typedefs.h"
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#include "cpu_core.h"
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#if defined(__cplusplus)
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extern "C" {
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#endif//__cplusplus
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#if defined(X86_ASM)
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/*
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* cpuid support verify routine
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* return 0 if cpuid is not supported by cpu
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*/
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int32_t WelsCPUIdVerify();
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void 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);
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int32_t WelsCPUSupportFMA (uint32_t eax, uint32_t ecx);
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void WelsEmms();
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/*
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* clear FPU registers states for potential float based calculation if support
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*/
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void WelsCPURestore (const uint32_t kuiCPU);
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#ifdef WIN64
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void WelsXmmRegStore(void * src);
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void WelsXmmRegLoad(void * src);
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#endif
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#else
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#define WelsEmms()
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#endif
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void WelsXmmRegEmptyOp(void * pSrc);
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uint32_t WelsCPUFeatureDetect (int32_t* pNumberOfLogicProcessors);
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#if defined(__cplusplus)
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}
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#endif//__cplusplus
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typedef void (*WelsXmmRegProtectFunc)(void * pSrc);
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#if defined(WIN64) && defined(X86_ASM)
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#define XMMREG_PROTECT_DECLARE(name) \
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WelsXmmRegProtectFunc name##load;\
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WelsXmmRegProtectFunc name##store;\
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uint8_t name##Buffer[160];
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#define XMMREG_PROTECT_INIT(name) \
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{ \
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uint32_t uiCpuFlag = WelsCPUFeatureDetect(NULL);\
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if( uiCpuFlag & WELS_CPU_SSE2 ){\
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name##load = WelsXmmRegLoad;\
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name##store = WelsXmmRegStore; \
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} else { \
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name##load = WelsXmmRegEmptyOp; \
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name##store = WelsXmmRegEmptyOp; \
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} \
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}
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#define XMMREG_PROTECT_UNINIT(name) \
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#define XMMREG_PROTECT_STORE(name) \
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name##store(name##Buffer);
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#define XMMREG_PROTECT_LOAD(name) \
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name##load(name##Buffer);
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#else
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#define XMMREG_PROTECT_DECLARE(name)
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#define XMMREG_PROTECT_INIT(name)
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#define XMMREG_PROTECT_UNINIT(name)
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#define XMMREG_PROTECT_STORE(name)
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#define XMMREG_PROTECT_LOAD(name)
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#endif
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#endif//WELS_CPU_DETECTION_H__
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