 |
| ||||
Home Page
F.A.Qs
Statistical Charts
Past Contests
Scheduled Contests
Award Contest
| ||||||||||
| Online Judge | Problem Set | Authors | Online Contests | User | ||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Web Board Home Page F.A.Qs Statistical Charts | Current Contest Past Contests Scheduled Contests Award Contest | |||||||||
在windows下你试过吗，帮我多试试看吧，如果真的比较精确，我就换一下，谢谢In Reply To:GetProcessTimes精度……100144*100nanoseconds Posted by:frkstyc at 2005-03-25 10:51:52 > 10ms左右吧，我觉得不如用QueryPerformance*那两个，算时间还方便
> _controlfp(PC_64, MCW_PC);
> static double _180 = 180.0;
> __asm
> {
> fldpi
> fdiv qword ptr [_180];
> mov ecx, 1090000
> fldz
> _Loop:
> fld st
> fsincos
> fstp qword ptr [_180]
> fstp qword ptr [_180]
> fadd st, st(1)
> loop _Loop
> fstp qword ptr [_180]
> fstp qword ptr [_180]
> }
> 这样一段程序，GPT不是0.240就是0.250，QPT是0.242和0.243。
> 而且在某些情况下，跑了2秒GPT也会返回0
Followed by:
Post your reply here: |
All Rights Reserved 2003-2013 Ying Fuchen,Xu Pengcheng,Xie Di
Any problem, Please Contact Administrator
