13
int ec_ilog(ec_uint32 _v){
15
return EC_CLZ0-EC_CLZ(_v);
17
/*On a Pentium M, this branchless version tested as the fastest on
18
1,000,000,000 random 32-bit integers, edging out a similar version with
19
branches, and a 256-entry LUT version.*/
23
m=!!(_v&0xFFFF0000)<<4;