diff options
Diffstat (limited to 'src/vectors-4-SSE.h')
| -rw-r--r-- | src/vectors-4-SSE.h | 15 |
1 files changed, 10 insertions, 5 deletions
diff --git a/src/vectors-4-SSE.h b/src/vectors-4-SSE.h index 8319c49..7948032 100644 --- a/src/vectors-4-SSE.h +++ b/src/vectors-4-SSE.h @@ -303,6 +303,12 @@ static const union { #ifdef __SSE4_1__ # define k4ifthen(x,y,z) (_mm_blendv_ps(y,z,x)) #else +#include <math.h> +#ifdef __cplusplus +#define SGN(x) std::signbit(x) +#else +#define SGN(x) signbit(x) +#endif # define k4ifthen(x,y,z) \ ({ \ CCTK_REAL4_VEC const xx=(x_); \ @@ -311,10 +317,9 @@ static const union { CCTK_REAL4_VEC const y=yy; \ CCTK_REAL4_VEC const zz=(z_); \ CCTK_REAL4_VEC const z=zz; \ - CCTK_REAL4_VEC const c = _mm_and_ps(x,k4sign_mask); \ - vec4_set(vec4_elt0(not vec4_elt0(c) ? y : z), \ - vec4_elt1(not vec4_elt1(c) ? y : z), \ - vec4_elt2(not vec4_elt2(c) ? y : z), \ - vec4_elt3(not vec4_elt3(c) ? y : z)); \ + vec4_set(SGN(vec4_elt0(x)) ? vec4_elt0(z) : vec4_elt0(y), \ + SGN(vec4_elt1(x)) ? vec4_elt1(z) : vec4_elt1(y), \ + SGN(vec4_elt2(x)) ? vec4_elt2(z) : vec4_elt2(y), \ + SGN(vec4_elt3(x)) ? vec4_elt3(z) : vec4_elt3(y)); \ }) #endif |