- ret =(double)(b->ms_win32.dwHighDateTime&0x000fffff)*10+
- b->ms_win32.dwLowDateTime/1e7;
- ret-=(double)(a->ms_win32.dwHighDateTime&0x000fffff)*10+a->ms_win32.dwLowDateTime/1e7;
+ {
+ signed _int64 la,lb;
+ la=a->ms_win32.dwHighDateTime;
+ lb=b->ms_win32.dwHighDateTime;
+ la<<=32;
+ lb<<=32;
+ la+=a->ms_win32.dwLowDateTime;
+ lb+=b->ms_win32.dwLowDateTime;
+ ret=((double)(lb-la))/1e7;
+ }