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(svn r4125) - Feature: Add a general TIC() TOC() mechanism using rdtsc or something similar on non-i386 architectures to performance-tune (critical) code. Some systems are probably missing, but those can be added later.

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Darkvater
2006-03-26 21:15:09 +00:00
parent 4125aa21f8
commit a91c52e169
8 changed files with 106 additions and 51 deletions
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30
train_cmd.c
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@@ -2087,29 +2087,6 @@ static const byte _search_directions[6][4] = {
};
static const byte _pick_track_table[6] = {1, 3, 2, 2, 0, 0};
#ifdef PF_BENCHMARK
#if !defined(_MSC_VER)
unsigned int _rdtsc()
{
unsigned int high, low;
__asm__ __volatile__ ("rdtsc" : "=a" (low), "=d" (high));
return low;
}
#else
#ifndef _M_AMD64
static unsigned int _declspec(naked) _rdtsc(void)
{
_asm {
rdtsc
ret
}
}
#endif
#endif
#endif
/* choose a track */
static byte ChooseTrainTrack(Vehicle* v, TileIndex tile, DiagDirection enterdir, TrackdirBits trackdirbits)
@@ -2117,8 +2094,7 @@ static byte ChooseTrainTrack(Vehicle* v, TileIndex tile, DiagDirection enterdir,
TrainTrackFollowerData fd;
uint best_track;
#ifdef PF_BENCHMARK
int time = _rdtsc();
static float f;
TIC()
#endif
assert((trackdirbits & ~0x3F) == 0);
@@ -2171,9 +2147,7 @@ static byte ChooseTrainTrack(Vehicle* v, TileIndex tile, DiagDirection enterdir,
}
#ifdef PF_BENCHMARK
time = _rdtsc() - time;
f = f * 0.99 + 0.01 * time;
printf("PF time = %d %f\n", time, f);
TOC("PF time = ", 1)
#endif
return best_track;