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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 "Timer.hpp"
#if !defined(__i386__) && defined(_M_IX86)
#define __i386__ 1
#endif
#if !defined(__x86_64__) && (defined(_M_AMD64) || defined (_M_X64))
#define __x86_64__ 1
#endif
#if defined(_WIN32)
#ifndef WIN32_LEAN_AND_MEAN
#define WIN32_LEAN_AND_MEAN
#endif
#include <windows.h>
#include <intrin.h>
#else
#include <sys/time.h>
#if defined(__i386__) || defined(__x86_64__)
#include <x86intrin.h>
#endif
#endif
namespace sw
{
Timer::Timer()
{
}
Timer::~Timer()
{
}
double Timer::seconds()
{
#if defined(_WIN32)
return (double)counter() / (double)frequency();
#else
timeval t;
gettimeofday(&t, 0);
return (double)t.tv_sec + (double)t.tv_usec * 1.0e-6;
#endif
}
int64_t Timer::ticks()
{
#if defined(_WIN32)
return __rdtsc();
#elif defined(__i386__) || defined(__x86_64__)
int64_t tsc;
__asm volatile("rdtsc": "=A" (tsc));
return tsc;
#else
return 0;
#endif
}
int64_t Timer::counter()
{
#if defined(_WIN32)
int64_t counter;
QueryPerformanceCounter((LARGE_INTEGER*)&counter);
return counter;
#else
timeval t;
gettimeofday(&t, 0);
return t.tv_sec * 1000000 + t.tv_usec;
#endif
}
int64_t Timer::frequency()
{
#if defined(_WIN32)
int64_t frequency;
QueryPerformanceFrequency((LARGE_INTEGER*)&frequency);
return frequency;
#else
return 1000000; // gettimeofday uses microsecond resolution
#endif
}
}