TakeV/dxx-rebirth
1
0
Fork 0
Code Issues Pull requests Packages Projects Releases Wiki Activity

Always use 64-bit math in vm_vec_dot3

Browse source
This commit is contained in:
Kp 2012-07-01 02:23:39 +00:00
parent 4c87504b91
commit 5ec78f320b
1 changed files with 7 additions and 4 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

11
common/maths/vecmat.cpp
View file

@ -198,10 +198,13 @@ fix vm_vec_dot3(fix x,fix y,fix z,const vms_vector *v)
return fixquadadjust(&q);
#else
long long p =
(long long) x * v->x
+ (long long) y * v->y
+ (long long) z * v->z;
int64_t x0 = x;
int64_t x1 = v->x;
int64_t y0 = y;
int64_t y1 = v->y;
int64_t z0 = z;
int64_t z1 = v->z;
int64_t p = (x0 * x1) + (y0 * y1) + (z0 * z1);
/* Convert back to fix and return. */
return p >> 16;
#endif