[Bf-blender-cvs] [81eee0f536] master: Cycles: Use fast math without finite optimization

[Sergey Sharybin]

Commit: 81eee0f536763f6ee660bfc8f359bc7853d3161c
Author: Sergey Sharybin
Date:   Mon Feb 13 16:25:35 2017 +0100
Branches: master
https://developer.blender.org/rB81eee0f536763f6ee660bfc8f359bc7853d3161c

Cycles: Use fast math without finite optimization

This allows us to use faster math and still have reliable
isnan/isfinite tests.

Only do it for host side, kernels stays unchanged.

Thanks Lukas Stockner for the tip!

===================================================================

M	intern/cycles/CMakeLists.txt

===================================================================

diff --git a/intern/cycles/CMakeLists.txt b/intern/cycles/CMakeLists.txt
index 79c1c3e3e8..31fa15a204 100644
--- a/intern/cycles/CMakeLists.txt
+++ b/intern/cycles/CMakeLists.txt
@@ -74,6 +74,7 @@ elseif(CMAKE_COMPILER_IS_GNUCC)
 	if(CXX_HAS_AVX2)
 		set(CYCLES_AVX2_KERNEL_FLAGS "-ffast-math -msse -msse2 -msse3 -mssse3 -msse4.1 -mavx -mavx2 -mfma -mlzcnt -mbmi -mbmi2 -mf16c -mfpmath=sse")
 	endif()
+	set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -ffast-math -fno-finite-math-only")
 elseif(CMAKE_CXX_COMPILER_ID MATCHES "Clang")
 	check_cxx_compiler_flag(-msse CXX_HAS_SSE)
 	check_cxx_compiler_flag(-mavx CXX_HAS_AVX)
@@ -89,6 +90,7 @@ elseif(CMAKE_CXX_COMPILER_ID MATCHES "Clang")
 	if(CXX_HAS_AVX2)
 		set(CYCLES_AVX2_KERNEL_FLAGS "-ffast-math -msse -msse2 -msse3 -mssse3 -msse4.1 -mavx -mavx2 -mfma -mlzcnt -mbmi -mbmi2 -mf16c")
 	endif()
+	set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -ffast-math -fno-finite-math-only")
 endif()
 
 if(CXX_HAS_SSE)