Reverting changes in test cmake for icpx compatibility

Removing -fno-fast-math from rotmg and rotg tests compilation causes them to
fail.

cmake/Modules/FindDPCPP.cmake

@@ -96,7 +96,7 @@ function(add_sycl_to_target)
     "${multi_value_args}"
     ${ARGN}
   )
-if((${CMAKE_CXX_COMPILER_ID} STREQUAL "IntelLLVM") AND NOT
+  if((${CMAKE_CXX_COMPILER_ID} STREQUAL "IntelLLVM") AND NOT
     (${TUNING_TARGET} STREQUAL "INTEL_GPU") )
     target_compile_options(${SB_ADD_SYCL_TARGET} PRIVATE -fno-fast-math)
     target_compile_options(${SB_ADD_SYCL_TARGET} PRIVATE -mllvm -loopopt=0 )

test/unittest/CMakeLists.txt

@@ -102,6 +102,12 @@ if(is_dpcpp)
 endif()
 
 
+# Contains tests that fail if compiled with -ffast-math
+set(SYCL_UNITTEST_NOFASTMATH
+  ${PORTBLAS_UNITTEST}/blas1/blas1_rotg_test.cpp
+  ${PORTBLAS_UNITTEST}/blas1/blas1_rotmg_test.cpp
+)
+
 if(GEMM_TALL_SKINNY_SUPPORT)
   list(APPEND SYCL_UNITTEST_SRCS ${PORTBLAS_UNITTEST}/blas3/blas3_gemm_tall_skinny_test.cpp)
 endif()
@@ -136,8 +142,9 @@ foreach(blas_test ${SYCL_UNITTEST_SRCS})
   target_link_libraries(${test_exec} PRIVATE gtest_main Clara::Clara blas::blas portblas)
   target_include_directories(${test_exec} PRIVATE ${CBLAS_INCLUDE} ${PORTBLAS_COMMON_INCLUDE_DIR})
 
-  if ((${CMAKE_CXX_COMPILER_ID} STREQUAL "IntelLLVM") AND NOT
-    (${TUNING_TARGET} STREQUAL "INTEL_GPU") )
+  list (FIND SYCL_UNITTEST_NOFASTMATH ${blas_test} _index)
+  if (${_index} GREATER -1 OR (${CMAKE_CXX_COMPILER_ID} STREQUAL "IntelLLVM" AND
+    TUNING_TARGET IN_LIST non_intel_target))
     target_compile_options(${test_exec} PRIVATE "-fno-fast-math")
   endif()