eden-emu/opus
15
0
Fork 0
mirror of https://github.com/xiph/opus.git synced 2025-05-30 15:17:42 +00:00
Code Issues Projects Releases Packages Wiki Activity Actions

Fix fixed-point testilog2.

Browse source 
Use exact integer operations to confirm the value returned is the
 correct one.
This commit is contained in:
Timothy B. Terriberry 2012-08-06 10:01:27 -07:00 • committed by Gregory Maxwell
parent 0d57a5dc28
commit 02f19c26f1
1 changed files with 10 additions and 3 deletions
Download patch file Download diff file Expand all files Collapse all files

13
celt/tests/test_unit_mathops.c
View file

@ -209,10 +209,17 @@ void testilog2(void)
opus_val32 x;
for (x=1;x<=268435455;x+=127)
{
opus_val32 error = abs(celt_ilog2(x)-(int)floor(log2(x)));
if (error!=0)
opus_val32 lg = celt_ilog2(x);
if (lg<0 || lg>=31)
{
printf("celt_ilog2 failed: celt_ilog2(x)!=floor(log2(x)) (x = %d, error = %d)\n",x,error);
printf("celt_ilog2 failed: 0<=celt_ilog2(x)<31 (x = %d, celt_ilog2(x) = %d)\n",x,lg);
ret = 1;
}
opus_val32 y = 1<<lg;
if (x<y || (x>>1)>=y)
{
printf("celt_ilog2 failed: 2**celt_ilog2(x)<=x<2**(celt_ilog2(x)+1) (x = %d, 2**celt_ilog2(x) = %d)\n",x,y);
ret = 1;
}
}