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# Copyright (c) 2018 Cisco and/or its affiliates.
# 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.
##############################################################################
# Cache line size detection
##############################################################################
if(CMAKE_SYSTEM_PROCESSOR MATCHES "^(aarch64.*|AARCH64.*)")
file(READ "/proc/cpuinfo" cpuinfo)
string(REPLACE "\n" ";" cpuinfo ${cpuinfo})
foreach(l ${cpuinfo})
string(REPLACE ":" ";" l ${l})
list(GET l 0 name)
list(GET l 1 value)
string(STRIP ${name} name)
string(STRIP ${value} value)
if(${name} STREQUAL "CPU implementer")
set(CPU_IMPLEMENTER ${value})
endif()
if(${name} STREQUAL "CPU part")
set(CPU_PART ${value})
endif()
endforeach()
# Implementer 0x43 - Cavium
# Part 0x0af - ThunderX2 is 64B, rest all are 128B
if (${CPU_IMPLEMENTER} STREQUAL "0x43" AND ${CPU_PART} STREQUAL "0x0af")
set(VPP_LOG2_CACHE_LINE_SIZE 6)
else()
set(VPP_LOG2_CACHE_LINE_SIZE 7)
endif()
math(EXPR VPP_CACHE_LINE_SIZE "1 << ${VPP_LOG2_CACHE_LINE_SIZE}")
message(STATUS "ARM AArch64 CPU implementer ${CPU_IMPLEMENTER} part ${CPU_PART} cacheline size ${VPP_CACHE_LINE_SIZE}")
else()
set(VPP_LOG2_CACHE_LINE_SIZE 6)
endif()
set(VPP_LOG2_CACHE_LINE_SIZE ${VPP_LOG2_CACHE_LINE_SIZE}
CACHE STRING "Target CPU cache line size (power of 2)")
##############################################################################
# CPU optimizations and multiarch support
##############################################################################
if(CMAKE_SYSTEM_PROCESSOR MATCHES "amd64.*|x86_64.*|AMD64.*")
set(CMAKE_C_FLAGS "-march=corei7 -mtune=corei7-avx ${CMAKE_C_FLAGS}")
set(VPP_LIB_DIR_NAME lib64)
check_c_compiler_flag("-march=core-avx2" compiler_flag_march_core_avx2)
if(compiler_flag_march_core_avx2)
list(APPEND MARCH_VARIANTS "avx2\;-march=core-avx2 -mtune=core-avx2")
endif()
check_c_compiler_flag("-march=skylake-avx512" compiler_flag_march_skylake_avx512)
if(compiler_flag_march_skylake_avx512)
list(APPEND MARCH_VARIANTS "avx512\;-march=skylake-avx512 -mtune=skylake-avx512")
endif()
elseif(CMAKE_SYSTEM_PROCESSOR MATCHES "^(aarch64.*|AARCH64.*)")
set(CMAKE_C_FLAGS "-march=armv8-a+crc ${CMAKE_C_FLAGS}")
set(VPP_LIB_DIR_NAME lib64)
else()
set(VPP_LIB_DIR_NAME lib)
endif()
macro(vpp_library_set_multiarch_sources lib)
foreach(V ${MARCH_VARIANTS})
list(GET V 0 VARIANT)
list(GET V 1 VARIANT_FLAGS)
set(l ${lib}_${VARIANT})
add_library(${l} OBJECT ${ARGN})
set_target_properties(${l} PROPERTIES POSITION_INDEPENDENT_CODE ON)
target_compile_options(${l} PUBLIC "-DCLIB_MARCH_VARIANT=${VARIANT}")
separate_arguments(VARIANT_FLAGS)
target_compile_options(${l} PUBLIC ${VARIANT_FLAGS})
target_sources(${lib} PRIVATE $<TARGET_OBJECTS:${l}>)
endforeach()
endmacro()
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