os_timer.cpp
Go to the documentation of this file.00001
00002
00005 #include "stdafx.h"
00006
00007 #undef RDTSC_AVAILABLE
00008
00009
00010
00011 #if defined(_MSC_VER) && !defined(RDTSC_AVAILABLE) && !defined(WINCE)
00012 #include <intrin.h>
00013 uint64 ottd_rdtsc()
00014 {
00015 return __rdtsc();
00016 }
00017 #define RDTSC_AVAILABLE
00018 #endif
00019
00020
00021 #if defined (__WATCOMC__) && !defined(RDTSC_AVAILABLE)
00022 unsigned __int64 ottd_rdtsc();
00023 # pragma aux ottd_rdtsc = 0x0F 0x31 value [edx eax] parm nomemory modify exact [edx eax] nomemory;
00024 # define RDTSC_AVAILABLE
00025 #endif
00026
00027
00028 #if (defined(__i386__) || defined(__x86_64__)) && !defined(__DJGPP__) && !defined(RDTSC_AVAILABLE)
00029 uint64 ottd_rdtsc()
00030 {
00031 uint32 high, low;
00032 __asm__ __volatile__ ("rdtsc" : "=a" (low), "=d" (high));
00033 return ((uint64)high << 32) | low;
00034 }
00035 # define RDTSC_AVAILABLE
00036 #endif
00037
00038
00039 #if (defined(__POWERPC__) || defined(__powerpc__)) && !defined(RDTSC_AVAILABLE)
00040 uint64 ottd_rdtsc()
00041 {
00042 uint32 high = 0, high2 = 0, low;
00043
00044
00045
00046
00047 asm volatile (
00048 "mftbu %0\n"
00049 "mftb %1\n"
00050 "mftbu %2\n"
00051 "cmpw %3,%4\n"
00052 "bne- $-16\n"
00053 : "=r" (high), "=r" (low), "=r" (high2)
00054 : "0" (high), "2" (high2)
00055 );
00056 return ((uint64)high << 32) | low;
00057 }
00058 # define RDTSC_AVAILABLE
00059 #endif
00060
00061
00062
00063 #if !defined(RDTSC_AVAILABLE)
00064
00065 # if !defined(_MSC_VER)
00066 #warning "(non-fatal) No support for rdtsc(), you won't be able to profile with TIC/TOC"
00067 # endif
00068 uint64 ottd_rdtsc() {return 0;}
00069 #endif