zdoom/raze-gles
0
0
Fork 0
mirror of https://github.com/ZDoom/raze-gles.git synced 2025-01-14 11:50:49 +00:00
Code Issues Projects Releases Packages Wiki Activity

engine: add klabs() back into ksqrtasm_old()

Browse source
This commit is contained in:
Richard C. Gobeille 2020-06-12 17:07:27 -07:00 committed by Christoph Oelckers
parent ba4eb3f906
commit d28929c437
1 changed files with 7 additions and 4 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

11
source/build/src/engine_priv.h
View file

@ -67,12 +67,15 @@ extern uint16_t sqrtable[4096], shlookup[4096+256],sqrtable_old[2048];
inline int32_t ksqrtasm_old(int32_t n)
{
n = klabs(n);
int shift;
for (shift = 0; n >= 2048; n >>=2, shift++)
uint32_t shift = 0;
n = klabs((int32_t)n);
while (n >= 2048)
{
n >>= 2;
++shift;
}
return (sqrtable_old[n]<<shift)>>10;
uint32_t const s = sqrtable_old[n];
return (s << shift) >> 10;
}
inline int32_t clip_nsqrtasm(int32_t n)