diff options
Diffstat (limited to 'src/util')
| -rw-r--r-- | src/util/rounding.h | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/src/util/rounding.h b/src/util/rounding.h index c8be45057b6..0cbe9269f7b 100644 --- a/src/util/rounding.h +++ b/src/util/rounding.h @@ -23,6 +23,10 @@ #include <math.h> +#ifdef __SSE4_1__ +#include <smmintrin.h> +#endif + /* The C standard library has functions round()/rint()/nearbyint() that round * their arguments according to the rounding mode set in the floating-point * control register. While there are trunc()/ceil()/floor() functions that do @@ -45,7 +49,15 @@ static inline float _mesa_roundevenf(float x) { +#ifdef __SSE4_1__ + float ret; + __m128 m = _mm_load_ss(&x); + m = _mm_round_ss(m, m, _MM_FROUND_CUR_DIRECTION | _MM_FROUND_NO_EXC); + _mm_store_ss(&ret, m); + return ret; +#else return rintf(x); +#endif } /** @@ -54,5 +66,13 @@ _mesa_roundevenf(float x) static inline double _mesa_roundeven(double x) { +#ifdef __SSE4_1__ + double ret; + __m128d m = _mm_load_sd(&x); + m = _mm_round_sd(m, m, _MM_FROUND_CUR_DIRECTION | _MM_FROUND_NO_EXC); + _mm_store_sd(&ret, m); + return ret; +#else return rint(x); +#endif } |