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## ======================================================================== ##
## Copyright 2017 Kitware, Inc. ##
## ##
## Licensed under the Apache License, Version 2.0 (the "License"); ##
## you may not use this file except in compliance with the License. ##
## You may obtain a copy of the License at ##
## ##
## http://www.apache.org/licenses/LICENSE-2.0 ##
## ##
## Unless required by applicable law or agreed to in writing, software ##
## distributed under the License is distributed on an "AS IS" BASIS, ##
## WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. ##
## See the License for the specific language governing permissions and ##
## limitations under the License. ##
## ======================================================================== ##
SET(CHECK_ISA_DIR "${CMAKE_CURRENT_LIST_DIR}")
FUNCTION(CHECK_ISA_DEFAULT OUTVAR)
TRY_COMPILE(COMPILER_SUPPORTS_ARM_NEON "${CMAKE_BINARY_DIR}" "${PROJECT_SOURCE_DIR}/common/cmake/check_arm_neon.cpp")
IF (COMPILER_SUPPORTS_ARM_NEON)
SET(ISA_DEFAULT "NEON")
SET(${OUTVAR} ${ISA_DEFAULT} PARENT_SCOPE)
RETURN()
ENDIF()
SET(ISA_DEFAULT_BIN "${CMAKE_BINARY_DIR}/${CMAKE_FILES_DIRECTORY}/check_isa_default.bin")
SET(SRC "${CHECK_ISA_DIR}/check_isa.cpp")
TRY_COMPILE(ISA_DEFAULT_COMPILE
"${CMAKE_BINARY_DIR}"
"${SRC}"
COPY_FILE "${ISA_DEFAULT_BIN}"
)
IF(NOT ISA_DEFAULT_COMPILE)
SET(ISA_DEFAULT "SSE2")
SET(${OUTVAR} ${ISA_DEFAULT} PARENT_SCOPE)
RETURN()
ENDIF()
FILE(STRINGS ${ISA_DEFAULT_BIN} ISA_DEFAULT REGEX "^ISA:")
STRING(REPLACE "ISA:" "" ISA_DEFAULT "${ISA_DEFAULT}")
SET(${OUTVAR} ${ISA_DEFAULT} PARENT_SCOPE)
ENDFUNCTION()
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