Enabled AVX512 support with MSVC. Fixes #206

Author: stefanatwork

CMakeLists.txt

@@ -317,9 +317,6 @@ IF (WIN32)
     INCLUDE(gnu)
   ELSE()
     set(EMBREE_SYCL_SUPPORT OFF)
-    IF (EMBREE_ISA_AVX512)
-      MESSAGE(FATAL_ERROR "Microsoft Visual C++ Compiler does not support AVX512. Please use Intel Compiler or Clang.")
-    ENDIF()
     MESSAGE("-- MSVC detected")
     INCLUDE (msvc)
   ENDIF()
@@ -403,7 +400,7 @@ IF (EMBREE_MAX_ISA STREQUAL "NONE")
     OPTION(EMBREE_ISA_SSE42 "Enables SSE4.2 ISA." ON)
     OPTION(EMBREE_ISA_AVX "Enables AVX ISA." ${COMPILER_SUPPORTS_AVX})
     OPTION(EMBREE_ISA_AVX2 "Enables AVX2 ISA." ${COMPILER_SUPPORTS_AVX2})
-    IF (WIN32 OR APPLE)
+    IF (APPLE)
       OPTION(EMBREE_ISA_AVX512 "Enables AVX512 ISA." OFF)
     ELSE()
       OPTION(EMBREE_ISA_AVX512 "Enables AVX512 ISA." ${COMPILER_SUPPORTS_AVX512})

common/cmake/msvc.cmake

@@ -5,6 +5,7 @@ SET(FLAGS_SSE2  "/D__SSE__ /D__SSE2__")
 SET(FLAGS_SSE42 "${FLAGS_SSE2} /D__SSE3__ /D__SSSE3__ /D__SSE4_1__ /D__SSE4_2__")
 SET(FLAGS_AVX   "${FLAGS_SSE42} /arch:AVX")
 SET(FLAGS_AVX2  "${FLAGS_SSE42} /arch:AVX2")
+SET(FLAGS_AVX512  "${FLAGS_AVX2} /arch:AVX512")
 
 SET(COMMON_CXX_FLAGS "")
 SET(COMMON_CXX_FLAGS "${COMMON_CXX_FLAGS} /EHsc")        # catch C++ exceptions only and extern "C" functions never throw a C++ exception