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Cycles: oneAPI: compile kernels with fast-relaxed-math

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This enables most of the GPU compiler's optimizations while -ffast-math
isn't set at DPC++ level.
It brings an overall 1% speedup and currently doesn't change the unit
tests pass rate.
This commit is contained in:
Xavier Hallade
2024-09-30 21:28:23 +02:00
parent 22d78c5a8e
commit 284b89a0a3
1 changed files with 1 additions and 1 deletions
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intern/cycles/kernel/CMakeLists.txt
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@@ -1057,7 +1057,7 @@ if(WITH_CYCLES_DEVICE_ONEAPI)
# Set defaults for spir64 and spir64_gen options
if(NOT DEFINED CYCLES_ONEAPI_SYCL_OPTIONS_spir64)
set(CYCLES_ONEAPI_SYCL_OPTIONS_spir64 "-options '-ze-opt-large-register-file -ze-opt-regular-grf-kernel integrator_intersect -ze-opt-large-grf-kernel shade -ze-opt-no-local-to-generic'")
set(CYCLES_ONEAPI_SYCL_OPTIONS_spir64 "-options '-cl-fast-relaxed-math -ze-opt-large-register-file -ze-opt-regular-grf-kernel integrator_intersect -ze-opt-large-grf-kernel shade -ze-opt-no-local-to-generic'")
endif()
if(NOT DEFINED CYCLES_ONEAPI_SYCL_OPTIONS_spir64_gen)
set(CYCLES_ONEAPI_SYCL_OPTIONS_spir64_gen "${CYCLES_ONEAPI_SYCL_OPTIONS_spir64}" CACHE STRING "Extra build options for spir64_gen target")