1 // Copyright 2016 The SwiftShader Authors. All Rights Reserved. 2 // 3 // Licensed under the Apache License, Version 2.0 (the "License"); 4 // you may not use this file except in compliance with the License. 5 // You may obtain a copy of the License at 6 // 7 // http://www.apache.org/licenses/LICENSE-2.0 8 // 9 // Unless required by applicable law or agreed to in writing, software 10 // distributed under the License is distributed on an "AS IS" BASIS, 11 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 12 // See the License for the specific language governing permissions and 13 // limitations under the License. 14 15 #include "Timer.hpp" 16 17 #if defined(_WIN32) 18 #ifndef WIN32_LEAN_AND_MEAN 19 #define WIN32_LEAN_AND_MEAN 20 #endif 21 #include <windows.h> 22 #else 23 #include <sys/time.h> 24 #include <x86intrin.h> 25 #endif 26 27 namespace sw 28 { 29 Timer::Timer() 30 { 31 } 32 33 Timer::~Timer() 34 { 35 } 36 37 double Timer::seconds() 38 { 39 #if defined(_WIN32) 40 return (double)counter() / (double)frequency(); 41 #else 42 timeval t; 43 gettimeofday(&t, 0); 44 return (double)t.tv_sec + (double)t.tv_usec * 1.0e-6; 45 #endif 46 } 47 48 int64_t Timer::ticks() 49 { 50 #if defined(_WIN32) 51 return __rdtsc(); 52 #else 53 int64_t tsc; 54 __asm volatile("rdtsc": "=A" (tsc)); 55 return tsc; 56 #endif 57 } 58 59 int64_t Timer::counter() 60 { 61 #if defined(_WIN32) 62 int64_t counter; 63 QueryPerformanceCounter((LARGE_INTEGER*)&counter); 64 return counter; 65 #else 66 timeval t; 67 gettimeofday(&t, 0); 68 return t.tv_sec * 1000000 + t.tv_usec; 69 #endif 70 } 71 72 int64_t Timer::frequency() 73 { 74 #if defined(_WIN32) 75 int64_t frequency; 76 QueryPerformanceFrequency((LARGE_INTEGER*)&frequency); 77 return frequency; 78 #else 79 return 1000000; // gettimeofday uses microsecond resolution 80 #endif 81 } 82 } 83
