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(__i386__) && defined(_M_IX86)
18	#define __i386__ 1
19#endif
20
21#if !defined(__x86_64__) && (defined(_M_AMD64) || defined (_M_X64))
22	#define __x86_64__ 1
23#endif
24
25#if defined(_WIN32)
26	#ifndef WIN32_LEAN_AND_MEAN
27		#define WIN32_LEAN_AND_MEAN
28	#endif
29	#include <windows.h>
30	#include <intrin.h>
31#else
32	#include <sys/time.h>
33	#if defined(__i386__) || defined(__x86_64__)
34		#include <x86intrin.h>
35	#endif
36#endif
37
38namespace sw
39{
40	Timer::Timer()
41	{
42	}
43
44	Timer::~Timer()
45	{
46	}
47
48	double Timer::seconds()
49	{
50		#if defined(_WIN32)
51			return (double)counter() / (double)frequency();
52		#else
53			timeval t;
54			gettimeofday(&t, 0);
55			return (double)t.tv_sec + (double)t.tv_usec * 1.0e-6;
56		#endif
57	}
58
59	int64_t Timer::ticks()
60	{
61		#if defined(_WIN32)
62			return __rdtsc();
63		#elif defined(__i386__) || defined(__x86_64__)
64			int64_t tsc;
65			__asm volatile("rdtsc": "=A" (tsc));
66			return tsc;
67		#else
68			return 0;
69		#endif
70	}
71
72	int64_t Timer::counter()
73	{
74		#if defined(_WIN32)
75			int64_t counter;
76			QueryPerformanceCounter((LARGE_INTEGER*)&counter);
77			return counter;
78		#else
79			timeval t;
80			gettimeofday(&t, 0);
81			return t.tv_sec * 1000000 + t.tv_usec;
82		#endif
83	}
84
85	int64_t Timer::frequency()
86	{
87		#if defined(_WIN32)
88			int64_t frequency;
89			QueryPerformanceFrequency((LARGE_INTEGER*)&frequency);
90			return frequency;
91		#else
92			return 1000000;   // gettimeofday uses microsecond resolution
93		#endif
94	}
95}
96