maki/openairinterface5g
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

fix for log2_approx to approximate to the nearest neighbor, instead of ceil

Browse Source
This commit is contained in:
francescomani
2024-09-23 17:56:50 +02:00
parent 385999dc5e
commit d304865489
1 changed files with 23 additions and 33 deletions
Download Patch File Download Diff File Expand all files Collapse all files
openair1/PHY/TOOLS/log2_approx.c
+23 -33
View File
@@ -21,56 +21,46 @@
unsigned char log2_approx(unsigned int x)
{
unsigned char l2 = 0;
unsigned int tmp = x >> 1;
int i;
unsigned char l2;
while (tmp) {
l2++;
tmp >>= 1;
}
l2=0;
if (l2)
l2 += (x >> (l2 - 1)) & 1;
for (i=0; i<31; i++)
if ((x&(1<<i)) != 0)
l2 = i+1;
//l2 = i;
// printf("log2_approx = %d\n",l2);
return(l2);
return l2;
}
unsigned char factor2(unsigned int x)
{
unsigned char l2 = 0;
int i;
unsigned char l2;
l2=0;
for (i=0; i<31; i++)
if ((x&(1<<i)) != 0)
for (i = 0; i < 31; i++)
if ((x & (1 << i)) != 0)
break;
l2 = i;
//printf("factor2(%d) = %d\n",x,l2);
return(l2);
return l2;
}
unsigned char log2_approx64(unsigned long long int x)
{
unsigned char l2 = 0;
unsigned long long int tmp = x >> 1;
int i;
unsigned char l2;
while (tmp) {
l2++;
tmp >>= 1;
}
l2=0;
if (l2)
l2 += (x >> (l2 - 1)) & 1;
for (i=0; i<63; i++)
if ((x&(((long long int) 1)<<i)) != 0)
// l2 = i+1;
l2 = i;
// printf("log2_approx = %d\n",l2);
return(l2);
return l2;
}