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Cycles: Disable optimization of operator / for float3 

This was giving some speedup but made intersection tests to fail
from watertight point of view.

Needs deeper investigation, but need to quickly get it fixed for
the studio.
This commit is contained in:
Sergey Sharybin 2016-10-14 13:51:59 +02:00
parent 3055ae5092
commit 0ddb8d9b13
1 changed files with 6 additions and 5 deletions
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11
intern/cycles/util/util_math.h
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@ -462,12 +462,13 @@ ccl_device_inline float3 operator*(const float f, const float3& a)
ccl_device_inline float3 operator/(const float f, const float3& a)
{
#ifdef __KERNEL_SSE__
__m128 rc = _mm_rcp_ps(a.m128);
return float3(_mm_mul_ps(_mm_set1_ps(f),rc));
#else
/* TODO(sergey): Currently disabled, gives speedup but makes intersection tets non-watertight. */
// #ifdef __KERNEL_SSE__
// __m128 rc = _mm_rcp_ps(a.m128);
// return float3(_mm_mul_ps(_mm_set1_ps(f),rc));
// #else
return make_float3(f / a.x, f / a.y, f / a.z);
#endif
// #endif
}
ccl_device_inline float3 operator/(const float3& a, const float f)