Allow choosing 64 as the SYCL subgroup size at compile time

Note the SYCL subgroup size will still be subject to a runtime check
AMReX-Codes · Jun 27, 2023 · 6cceaa8 · 6cceaa8
1 parent e407286
commit 6cceaa8
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diff --git a/Docs/sphinx_documentation/source/GPU.rst b/Docs/sphinx_documentation/source/GPU.rst
@@ -404,7 +404,7 @@ Below is an example configuration for SYCL:
    +------------------------------+-------------------------------------------------+-------------+-----------------+
    | AMReX_SYCL_ONEDPL            | Enable SYCL's oneDPL algorithms                 | NO          | YES, NO         |
    +------------------------------+-------------------------------------------------+-------------+-----------------+
-   | AMReX_SYCL_SUB_GROUP_SIZE    | Specify subgroup size                           | 32          | 32, 16          |
+   | AMReX_SYCL_SUB_GROUP_SIZE    | Specify subgroup size                           | 32          | 64, 32, 16      |
    +------------------------------+-------------------------------------------------+-------------+-----------------+
 .. raw:: latex
 

diff --git a/Tools/CMake/AMReXOptions.cmake b/Tools/CMake/AMReXOptions.cmake
@@ -169,7 +169,7 @@ if (AMReX_SYCL)
    unset(_valid_sycl_compiler_ids)
 
    set(AMReX_SYCL_SUB_GROUP_SIZE_DEFAULT 32)
-   set(AMReX_SYCL_SUB_GROUP_SIZE_VALUES 16 32)
+   set(AMReX_SYCL_SUB_GROUP_SIZE_VALUES 16 32 64)
    set(AMReX_SYCL_SUB_GROUP_SIZE ${AMReX_SYCL_SUB_GROUP_SIZE_DEFAULT} CACHE STRING
        "SYCL sub-group size")
    if (NOT AMReX_SYCL_SUB_GROUP_SIZE IN_LIST AMReX_SYCL_SUB_GROUP_SIZE_VALUES)