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Added ec_{enc|dec}_bits64 and ec_{enc|dec}_bits64.

Browse source 
Updated broken paper URLs.
Cleaned up non-multiply-free range coder documentation (e.g., stop claiming
it's multiply-free).
This commit is contained in:
Timothy B. Terriberry 2007-12-11 13:25:57 +11:00 • committed by Jean-Marc Valin
parent d710177d0a
commit f13fea7b53
13 changed files with 175 additions and 44 deletions
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28
libentcode/entcode.c
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@ -42,3 +42,31 @@ int ec_ilog(ec_uint32 _v){
return ret;
#endif
}
int ec_ilog64(ec_uint64 _v){
#if defined(EC_CLZ64)
return EC_CLZ64_0-EC_CLZ64(_v)&-!!_v;
#else
ec_uint32 v;
int ret;
int m;
ret=!!_v;
m=!!(_v&0xFFFFFFFF00000000)<<5;
v=(ec_uint32)(_v>>m);
ret|=m;
m=!!(v&0xFFFF0000)<<4;
v>>=m;
ret|=m;
m=!!(v&0xFF00)<<3;
v>>=m;
ret|=m;
m=!!(v&0xF0)<<2;
v>>=m;
ret|=m;
m=!!(v&0xC)<<1;
v>>=m;
ret|=m;
ret+=!!(v&0x2);
return ret;
#endif
}