ssef constructor question

Intel® Embree Ray Tracing Kernels

Discussion forum on the open source ray tracing kernels for fast photo-realistic rendering on Intel® CPU(s)

ssef constructor question

272 Views

Sory, don't undestand much SSE, but why this constructor was commented:

__forceinline ssef ( float a ) : m128(_mm_set1_ps(a)) {}

and now this one is used:

__forceinline ssef ( const float& a ) : m128(_mm_castsi128_ps(_mm_shuffle_epi32(_mm_castps_si128(_mm_load_ss(&a)), _MM_SHUFFLE(0, 0, 0, 0)))) {}

The other constructors are still using _mm_set_ps().

Link Copied

0 Replies

Community support is provided during standard business hours (Monday to Friday 7AM - 5PM PST). Other contact methods are available here.

Intel does not verify all solutions, including but not limited to any file transfers that may appear in this community. Accordingly, Intel disclaims all express and implied warranties, including without limitation, the implied warranties of merchantability, fitness for a particular purpose, and non-infringement, as well as any warranty arising from course of performance, course of dealing, or usage in trade.

For more complete information about compiler optimizations, see our Optimization Notice.