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[trunk] Speed-up opj_int_fix_mul by removing unneeded operation 

Update  issue 220
This commit is contained in:
Matthieu Darbois 2014-12-13 10:27:21 +00:00
parent e05d2901ec
commit d0ce2ced53
1 changed files with 1 additions and 1 deletions
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2
src/lib/openjp2/opj_intmath.h
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@ -166,7 +166,7 @@ Multiply two fixed-precision rational numbers.
*/ */
static INLINE OPJ_INT32 opj_int_fix_mul(OPJ_INT32 a, OPJ_INT32 b) { static INLINE OPJ_INT32 opj_int_fix_mul(OPJ_INT32 a, OPJ_INT32 b) {
OPJ_INT64 temp = (OPJ_INT64) a * (OPJ_INT64) b ; OPJ_INT64 temp = (OPJ_INT64) a * (OPJ_INT64) b ;
temp += temp & 4096; temp += 4096;
return (OPJ_INT32) (temp >> 13) ; return (OPJ_INT32) (temp >> 13) ;
} }