More efficient absolute value on SSE2

2016-06-20 08:59:25 -04:00 · 2016-06-20 08:59:25 -04:00 · 36762ac4b4
commit 36762ac4b4
parent 4a8105e925
1 changed files with 1 additions and 1 deletions
--- a/contrib/intel/filter_sse2_intrinsics.c
+++ b/contrib/intel/filter_sse2_intrinsics.c
@ -208,7 +208,7 @@ static __m128i abs_i16(__m128i x) {
   x = _mm_xor_si128(x, is_negative);

   /* +1 to negative lanes, else +0. */
-   x = _mm_add_epi16(x, _mm_srli_epi16(is_negative, 15));
+   x = _mm_sub_epi16(x, is_negative);
   return x;
 #endif
 }