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Diffstat (limited to 'celt/entcode.c')
| -rw-r--r-- | celt/entcode.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/celt/entcode.c b/celt/entcode.c index 02ac690..fa5d7c7 100644 --- a/celt/entcode.c +++ b/celt/entcode.c @@ -33,6 +33,11 @@ #include "arch.h" #if !defined(EC_CLZ) +/*This is a fallback for systems where we don't know how to access + a BSR or CLZ instruction (see ecintrin.h). + If you are optimizing Opus on a new platform and it has a native CLZ or + BZR (e.g. cell, MIPS, x86, etc) then making it available to Opus will be + an easy performance win.*/ int ec_ilog(opus_uint32 _v){ /*On a Pentium M, this branchless version tested as the fastest on 1,000,000,000 random 32-bit integers, edging out a similar version with |