// Copyright 2016 The SwiftShader Authors. All Rights Reserved.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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#include "Timer.hpp"
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#if !defined(__i386__) && defined(_M_IX86)
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#define __i386__ 1
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#endif
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#if !defined(__x86_64__) && (defined(_M_AMD64) || defined (_M_X64))
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#define __x86_64__ 1
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#endif
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#if defined(_WIN32)
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#ifndef WIN32_LEAN_AND_MEAN
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#define WIN32_LEAN_AND_MEAN
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#endif
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#include <windows.h>
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#include <intrin.h>
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#else
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#include <sys/time.h>
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#if defined(__i386__) || defined(__x86_64__)
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#include <x86intrin.h>
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#endif
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#endif
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namespace sw
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{
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Timer::Timer()
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{
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}
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Timer::~Timer()
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{
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}
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double Timer::seconds()
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{
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#if defined(_WIN32)
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return (double)counter() / (double)frequency();
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#else
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timeval t;
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gettimeofday(&t, 0);
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return (double)t.tv_sec + (double)t.tv_usec * 1.0e-6;
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#endif
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}
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int64_t Timer::ticks()
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{
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#if defined(_WIN32)
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return __rdtsc();
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#elif defined(__i386__) || defined(__x86_64__)
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int64_t tsc;
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__asm volatile("rdtsc": "=A" (tsc));
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return tsc;
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#else
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return 0;
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#endif
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}
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int64_t Timer::counter()
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{
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#if defined(_WIN32)
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int64_t counter;
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QueryPerformanceCounter((LARGE_INTEGER*)&counter);
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return counter;
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#else
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timeval t;
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gettimeofday(&t, 0);
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return t.tv_sec * 1000000 + t.tv_usec;
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#endif
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}
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int64_t Timer::frequency()
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{
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#if defined(_WIN32)
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int64_t frequency;
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QueryPerformanceFrequency((LARGE_INTEGER*)&frequency);
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return frequency;
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#else
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return 1000000; // gettimeofday uses microsecond resolution
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#endif
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}
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}
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