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cmake_minimum_required(VERSION 3.9)
project(fpm)
set(CMAKE_CXX_STANDARD 11)
add_library(fpm INTERFACE)
target_include_directories(fpm INTERFACE include)
#
# Test suite
#
enable_testing()
include(GoogleTest)
add_executable(fpm-test
tests/arithmetic.cpp
tests/arithmetic_int.cpp
tests/basic_math.cpp
tests/constants.cpp
tests/conversion.cpp
tests/classification.cpp
tests/customizations.cpp
tests/detail.cpp
tests/input.cpp
tests/manip.cpp
tests/nearest.cpp
tests/output.cpp
tests/power.cpp
tests/trigonometry.cpp
)
set_target_properties(fpm-test PROPERTIES CXX_STANDARD 11)
target_link_libraries(fpm-test PRIVATE fpm gtest_main)
gtest_add_tests(TARGET fpm-test)
#
# libfixmath for alternative comparison
#
include(ExternalProject)
# Libfixmath uses a Makefile with hardcoded compiler (gcc).
# So we need to define our own build rules.
set(LIBFIXMATH_ROOT "${CMAKE_CURRENT_BINARY_DIR}/libfixmath")
ExternalProject_Add(libfixmath-external
GIT_REPOSITORY "https://github.com/PetteriAimonen/libfixmath.git"
GIT_TAG bada934981a5961569ad2cb6b9006ed94542cc9c
PREFIX ${LIBFIXMATH_ROOT}
CONFIGURE_COMMAND ""
BUILD_COMMAND ""
INSTALL_COMMAND ""
)
set(LIBFIXMATH_SOURCES
${LIBFIXMATH_ROOT}/src/libfixmath-external/libfixmath/fix16.c
${LIBFIXMATH_ROOT}/src/libfixmath-external/libfixmath/fix16_exp.c
${LIBFIXMATH_ROOT}/src/libfixmath-external/libfixmath/fix16_sqrt.c
${LIBFIXMATH_ROOT}/src/libfixmath-external/libfixmath/fix16_str.c
${LIBFIXMATH_ROOT}/src/libfixmath-external/libfixmath/fix16_trig.c
${LIBFIXMATH_ROOT}/src/libfixmath-external/libfixmath/fract32.c
${LIBFIXMATH_ROOT}/src/libfixmath-external/libfixmath/uint32.c
)
set_source_files_properties(${LIBFIXMATH_SOURCES} PROPERTIES GENERATED TRUE)
add_library(libfixmath ${LIBFIXMATH_SOURCES})
# Set libfixmath compile options to match fpm functionality
target_compile_definitions(libfixmath
PUBLIC
FIXMATH_NO_CACHE # No caching of results
#FIXMATH_NO_OVERFLOW # We want no runtime-overflow detection, but it fails to compile
#FIXMATH_NO_ROUNDING # We do want rounding
#FIXMATH_NO_64BIT # We do want 64-bit integer support
#FIXMATH_OPTIMIZE_8BIT # No special 8-bit architecture optimizations
#FIXMATH_SIN_LUT # No lookup table for sin
#FIXMATH_FAST_SIN # Prefer accuracy over speed
)
target_include_directories(libfixmath PUBLIC ${LIBFIXMATH_ROOT}/src/libfixmath-external/libfixmath)
add_dependencies(libfixmath libfixmath-external)
#
# CNL for alternative comparison
#
set(LIBCNL_ROOT "${CMAKE_CURRENT_BINARY_DIR}/libcnl")
ExternalProject_Add(libcnl-external
GIT_REPOSITORY "https://github.com/johnmcfarlane/cnl"
GIT_TAG 4d445566fe7c6c8939fffc145a2f30fd587796a6
PREFIX ${LIBCNL_ROOT}
CONFIGURE_COMMAND ""
BUILD_COMMAND ""
INSTALL_COMMAND ""
)
add_library(libcnl INTERFACE)
target_include_directories(libcnl INTERFACE ${LIBCNL_ROOT}/src/libcnl-external/include)
add_dependencies(libcnl libcnl-external)
#
# Benchmark tool.
# Runs benchmarks of FPM operations and dumps results to standard output.
#
add_executable(fpm-benchmark
benchmarks/arithmetic.cpp
benchmarks/power.cpp
benchmarks/trigonometry.cpp
)
target_link_libraries(fpm-benchmark PRIVATE fpm libfixmath libcnl benchmark benchmark_main)
#
# Accuracy tool.
# Dumps the accuracy of approximated FPM functions to JSON files.
#
add_executable(fpm-accuracy
accuracy/accuracy.cpp
)
set_target_properties(fpm-accuracy PROPERTIES CXX_STANDARD 14)
target_link_libraries(fpm-accuracy PRIVATE fpm libfixmath)
include(FindGnuplot)
if (GNUPLOT_FOUND)
# Create accuracy data
set(DATA_DIR ${CMAKE_CURRENT_BINARY_DIR})
set(DATA_FILES_ACCURACY "")
set(IMG_FILES_ACCURACY "")
foreach(DATA sin-trig cos-trig tan-trig asin-invtrig acos-invtrig atan-invtrig atan2-trig sqrt-auto cbrt-auto pow-auto exp-auto exp2-auto log-auto log2-auto log10-auto)
string(REGEX MATCHALL "[^-]+" M ${DATA})
list(GET M 0 SERIES)
list(GET M 1 TYPE)
set(IMG_FILE ${DATA_DIR}/accuracy-${SERIES}.png)
list(APPEND DATA_FILES_ACCURACY ${DATA_DIR}/${SERIES}.csv)
list(APPEND IMG_FILES_ACCURACY ${IMG_FILE})
add_custom_command(
OUTPUT ${IMG_FILE}
COMMAND ${GNUPLOT_EXECUTABLE} -c ${PROJECT_SOURCE_DIR}/accuracy/accuracy.gnuplot ${SERIES} ${TYPE}
DEPENDS ${DATA_DIR}/${SERIES}.csv accuracy/accuracy.gnuplot
WORKING_DIRECTORY ${DATA_DIR}
VERBATIM
COMMENT "Plotting ${SERIES} accuracy data"
)
endforeach(DATA)
add_custom_command(
OUTPUT ${DATA_FILES_ACCURACY}
COMMAND fpm-accuracy
DEPENDS fpm-accuracy
WORKING_DIRECTORY ${DATA_DIR}
VERBATIM
COMMENT "Generating accuracy data with fpm-accuracy"
)
add_custom_target(fpm-accuracy-images DEPENDS ${IMG_FILES_ACCURACY})
endif()
if (CMAKE_BUILD_TYPE STREQUAL "Release")
# Enable the performance data-generation command only for Release builds.
set(DATA_FILE_PERFORMANCE_JSON ${DATA_DIR}/performance.json)
add_custom_command(
OUTPUT ${DATA_FILE_PERFORMANCE_JSON}
COMMAND fpm-benchmark --benchmark_out=${DATA_FILE_PERFORMANCE_JSON} --benchmark_out_format=json
DEPENDS fpm-benchmark
WORKING_DIRECTORY ${DATA_DIR}
VERBATIM
COMMENT "Generating performance data with fpm-benchmark"
)
set(DATA_FILE_PERFORMANCE_GNUPLOT ${DATA_DIR}/performance.csv)
add_custom_command(
OUTPUT ${DATA_FILE_PERFORMANCE_GNUPLOT}
COMMAND python ${PROJECT_SOURCE_DIR}/benchmarks/benchmark.py ${DATA_FILE_PERFORMANCE_JSON} ${DATA_FILE_PERFORMANCE_GNUPLOT}
DEPENDS ${DATA_FILE_PERFORMANCE_JSON} ${PROJECT_SOURCE_DIR}/benchmarks/benchmark.py
WORKING_DIRECTORY ${DATA_DIR}
VERBATIM
COMMENT "Converting performance data for GnuPlot"
)
set(IMG_FILE_PERFORMANCE "{$DATA_DIR}/performance.png")
add_custom_command(
OUTPUT ${IMG_FILE_PERFORMANCE}
COMMAND ${GNUPLOT_EXECUTABLE} ${PROJECT_SOURCE_DIR}/benchmarks/benchmark.gnuplot
DEPENDS ${DATA_FILE_PERFORMANCE_GNUPLOT} ${PROJECT_SOURCE_DIR}/benchmarks/benchmark.gnuplot
WORKING_DIRECTORY ${DATA_DIR}
VERBATIM
COMMENT "Plotting performance data"
)
add_custom_target(fpm-performance-images DEPENDS ${IMG_FILE_PERFORMANCE})
endif()
add_subdirectory(3rdparty/googlebench)
add_subdirectory(3rdparty/googletest)
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