derek.holloway
7502bf64a4
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64 lines
2.7 KiB
CMake
64 lines
2.7 KiB
CMake
# Copyright (c) Advanced Micro Devices, Inc., or its affiliates.
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#
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# SPDX-License-Identifier: MIT
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# Detect unique GPU architectures for add_custom_command
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if(NOT DEFINED HIP_ARCH_DETECTION_DONE)
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set(HIP_ARCH_DETECTION_DONE TRUE CACHE INTERNAL "HIP architecture detection completed")
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# Detect GPU architectures for code object generation
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# Note: CMake's HIP language support may not deduplicate architectures
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# Fix any duplicates in CMAKE_HIP_ARCHITECTURES if already set
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if(DEFINED CMAKE_HIP_ARCHITECTURES AND CMAKE_HIP_ARCHITECTURES)
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# Convert to list and remove duplicates
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string(REPLACE ";" ";" GPU_ARCH_LIST "${CMAKE_HIP_ARCHITECTURES}")
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list(REMOVE_ITEM GPU_ARCH_LIST "gfx000" "")
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list(REMOVE_DUPLICATES GPU_ARCH_LIST)
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set(CMAKE_HIP_ARCHITECTURES "${GPU_ARCH_LIST}" CACHE STRING "HIP architectures" FORCE)
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message(STATUS "Deduplicated HIP architectures: ${CMAKE_HIP_ARCHITECTURES}")
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elseif(NOT DEFINED CMAKE_HIP_ARCHITECTURES OR NOT CMAKE_HIP_ARCHITECTURES)
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# Auto-detect if not set
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if(NOT DEFINED ROCM_PATH)
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# Derive ROCM_PATH from HIP_PATH
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if(DEFINED ENV{ROCM_PATH})
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set(ROCM_PATH $ENV{ROCM_PATH})
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elseif(DEFINED HIP_PATH)
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set(ROCM_PATH ${HIP_PATH})
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endif()
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endif()
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find_program(ROCM_AGENT_ENUM rocm_agent_enumerator
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HINTS ${ROCM_PATH}/bin)
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execute_process(
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COMMAND ${ROCM_AGENT_ENUM}
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OUTPUT_VARIABLE DETECTED_GPUS
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OUTPUT_STRIP_TRAILING_WHITESPACE
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ERROR_QUIET
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)
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if(DETECTED_GPUS)
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string(REPLACE "\n" ";" GPU_ARCH_LIST "${DETECTED_GPUS}")
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list(REMOVE_ITEM GPU_ARCH_LIST "gfx000" "")
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list(REMOVE_DUPLICATES GPU_ARCH_LIST)
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set(CMAKE_HIP_ARCHITECTURES "${GPU_ARCH_LIST}" CACHE STRING "HIP architectures" FORCE)
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message(STATUS "Detected HIP architectures: ${CMAKE_HIP_ARCHITECTURES}")
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else()
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set(CMAKE_HIP_ARCHITECTURES "gfx90a" CACHE STRING "HIP architectures" FORCE)
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message(STATUS "Could not detect GPU, using default: ${CMAKE_HIP_ARCHITECTURES}")
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endif()
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endif()
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endif()
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# For custom commands that need --offload-arch flags, convert the list to multiple flags
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# This needs to be regenerated each time in case CMAKE_HIP_ARCHITECTURES changed
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set(OFFLOAD_ARCH_FLAGS "")
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foreach(arch ${CMAKE_HIP_ARCHITECTURES})
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list(APPEND OFFLOAD_ARCH_FLAGS "--offload-arch=${arch}")
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endforeach()
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# Build flags for device-only compilation (CMAKE_HIP_FLAGS minus --offload-arch)
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string(TOUPPER "${CMAKE_BUILD_TYPE}" _HIP_BUILD_TYPE_UPPER)
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separate_arguments(HIP_DEVICE_BUILD_FLAGS_NO_ARCH NATIVE_COMMAND
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"${CMAKE_HIP_FLAGS} ${CMAKE_HIP_FLAGS_${_HIP_BUILD_TYPE_UPPER}}")
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list(FILTER HIP_DEVICE_BUILD_FLAGS_NO_ARCH EXCLUDE REGEX "--offload-arch=")
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