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// Copyright 2016 The SwiftShader Authors. All Rights Reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
#include "CPUID.hpp"
#if defined(_WIN32)
#ifndef WIN32_LEAN_AND_MEAN
#define WIN32_LEAN_AND_MEAN
#endif
#include <windows.h>
#include <intrin.h>
#include <float.h>
#else
#include <unistd.h>
#include <sched.h>
#include <sys/types.h>
#endif
namespace sw
{
bool CPUID::MMX = detectMMX();
bool CPUID::CMOV = detectCMOV();
bool CPUID::SSE = detectSSE();
bool CPUID::SSE2 = detectSSE2();
bool CPUID::SSE3 = detectSSE3();
bool CPUID::SSSE3 = detectSSSE3();
bool CPUID::SSE4_1 = detectSSE4_1();
int CPUID::cores = detectCoreCount();
int CPUID::affinity = detectAffinity();
bool CPUID::enableMMX = true;
bool CPUID::enableCMOV = true;
bool CPUID::enableSSE = true;
bool CPUID::enableSSE2 = true;
bool CPUID::enableSSE3 = true;
bool CPUID::enableSSSE3 = true;
bool CPUID::enableSSE4_1 = true;
void CPUID::setEnableMMX(bool enable)
{
enableMMX = enable;
if(!enableMMX)
{
enableSSE = false;
enableSSE2 = false;
enableSSE3 = false;
enableSSSE3 = false;
enableSSE4_1 = false;
}
}
void CPUID::setEnableCMOV(bool enable)
{
enableCMOV = enable;
if(!CMOV)
{
enableSSE = false;
enableSSE2 = false;
enableSSE3 = false;
enableSSSE3 = false;
enableSSE4_1 = false;
}
}
void CPUID::setEnableSSE(bool enable)
{
enableSSE = enable;
if(enableSSE)
{
enableMMX = true;
enableCMOV = true;
}
else
{
enableSSE2 = false;
enableSSE3 = false;
enableSSSE3 = false;
enableSSE4_1 = false;
}
}
void CPUID::setEnableSSE2(bool enable)
{
enableSSE2 = enable;
if(enableSSE2)
{
enableMMX = true;
enableCMOV = true;
enableSSE = true;
}
else
{
enableSSE3 = false;
enableSSSE3 = false;
enableSSE4_1 = false;
}
}
void CPUID::setEnableSSE3(bool enable)
{
enableSSE3 = enable;
if(enableSSE3)
{
enableMMX = true;
enableCMOV = true;
enableSSE = true;
enableSSE2 = true;
}
else
{
enableSSSE3 = false;
enableSSE4_1 = false;
}
}
void CPUID::setEnableSSSE3(bool enable)
{
enableSSSE3 = enable;
if(enableSSSE3)
{
enableMMX = true;
enableCMOV = true;
enableSSE = true;
enableSSE2 = true;
enableSSE3 = true;
}
else
{
enableSSE4_1 = false;
}
}
void CPUID::setEnableSSE4_1(bool enable)
{
enableSSE4_1 = enable;
if(enableSSE4_1)
{
enableMMX = true;
enableCMOV = true;
enableSSE = true;
enableSSE2 = true;
enableSSE3 = true;
enableSSSE3 = true;
}
}
static void cpuid(int registers[4], int info)
{
#if defined(__i386__) || defined(__x86_64__)
#if defined(_WIN32)
__cpuid(registers, info);
#else
__asm volatile("cpuid": "=a" (registers[0]), "=b" (registers[1]), "=c" (registers[2]), "=d" (registers[3]): "a" (info));
#endif
#else
registers[0] = 0;
registers[1] = 0;
registers[2] = 0;
registers[3] = 0;
#endif
}
bool CPUID::detectMMX()
{
int registers[4];
cpuid(registers, 1);
return MMX = (registers[3] & 0x00800000) != 0;
}
bool CPUID::detectCMOV()
{
int registers[4];
cpuid(registers, 1);
return CMOV = (registers[3] & 0x00008000) != 0;
}
bool CPUID::detectSSE()
{
int registers[4];
cpuid(registers, 1);
return SSE = (registers[3] & 0x02000000) != 0;
}
bool CPUID::detectSSE2()
{
int registers[4];
cpuid(registers, 1);
return SSE2 = (registers[3] & 0x04000000) != 0;
}
bool CPUID::detectSSE3()
{
int registers[4];
cpuid(registers, 1);
return SSE3 = (registers[2] & 0x00000001) != 0;
}
bool CPUID::detectSSSE3()
{
int registers[4];
cpuid(registers, 1);
return SSSE3 = (registers[2] & 0x00000200) != 0;
}
bool CPUID::detectSSE4_1()
{
int registers[4];
cpuid(registers, 1);
return SSE4_1 = (registers[2] & 0x00080000) != 0;
}
int CPUID::detectCoreCount()
{
int cores = 0;
#if defined(_WIN32)
DWORD_PTR processAffinityMask = 1;
DWORD_PTR systemAffinityMask = 1;
GetProcessAffinityMask(GetCurrentProcess(), &processAffinityMask, &systemAffinityMask);
while(systemAffinityMask)
{
if(systemAffinityMask & 1)
{
cores++;
}
systemAffinityMask >>= 1;
}
#else
cores = sysconf(_SC_NPROCESSORS_ONLN);
#endif
if(cores < 1) cores = 1;
if(cores > 16) cores = 16;
return cores; // FIXME: Number of physical cores
}
int CPUID::detectAffinity()
{
int cores = 0;
#if defined(_WIN32)
DWORD_PTR processAffinityMask = 1;
DWORD_PTR systemAffinityMask = 1;
GetProcessAffinityMask(GetCurrentProcess(), &processAffinityMask, &systemAffinityMask);
while(processAffinityMask)
{
if(processAffinityMask & 1)
{
cores++;
}
processAffinityMask >>= 1;
}
#else
return detectCoreCount(); // FIXME: Assumes no affinity limitation
#endif
if(cores < 1) cores = 1;
if(cores > 16) cores = 16;
return cores;
}
void CPUID::setFlushToZero(bool enable)
{
#if defined(_MSC_VER)
_controlfp(enable ? _DN_FLUSH : _DN_SAVE, _MCW_DN);
#else
// Unimplemented
#endif
}
void CPUID::setDenormalsAreZero(bool enable)
{
// Unimplemented
}
}