diff options
Diffstat (limited to 'apps/codecs/libwmapro/wmapro_math.h')
| -rw-r--r-- | apps/codecs/libwmapro/wmapro_math.h | 7 |
1 files changed, 3 insertions, 4 deletions
diff --git a/apps/codecs/libwmapro/wmapro_math.h b/apps/codecs/libwmapro/wmapro_math.h index a34a5a8d5a..c78d6b627f 100644 --- a/apps/codecs/libwmapro/wmapro_math.h +++ b/apps/codecs/libwmapro/wmapro_math.h @@ -53,18 +53,17 @@ lo; \ }) - /* Calculates: result = (X*Y)>>31 */ + /* Calculates: result = (X*Y)>>31, loose 1 bit precision */ #define fixmul31(X,Y) \ ({ \ int32_t lo; \ int32_t hi; \ asm volatile ( \ "smull %[lo], %[hi], %[x], %[y] \n\t" /* multiply */ \ - "mov %[lo], %[lo], lsr #31 \n\t" /* lo >>= 31 */ \ - "orr %[lo], %[lo], %[hi], lsl #1" /* lo |= (hi << 1) */ \ + "mov %[hi], %[hi], lsl #1" /* hi <<= 1 */ \ : [lo]"=&r"(lo), [hi]"=&r"(hi) \ : [x]"r"(X), [y]"r"(Y)); \ - lo; \ + hi; \ }) #elif defined(CPU_COLDFIRE) /* Calculates: result = (X*Y)>>Z */ |