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# detect SIMD extensions
#
# HAVE_ARM
# HAVE_ARMV8_CRC
# HAVE_ARMV8_CRC_CRYPTO_INTRINSICS
# HAVE_ARMV8_CRYPTO
# HAVE_ARMV8_SIMD
# HAVE_ARM_NEON
#
# HAVE_INTEL
# HAVE_INTEL_SSE
# HAVE_INTEL_SSE2
# HAVE_INTEL_SSE3
# HAVE_INTEL_SSSE3
# HAVE_INTEL_PCLMUL
# HAVE_INTEL_SSE4_1
# HAVE_INTEL_SSE4_2
#
# HAVE_PPC64LE
# HAVE_PPC64
# HAVE_PPC
#
# SIMD_COMPILE_FLAGS
#
if(CMAKE_SYSTEM_PROCESSOR MATCHES "aarch64|AARCH64")
set(HAVE_ARM 1)
include(CheckCCompilerFlag)
check_c_compiler_flag(-march=armv8-a+crc+crypto HAVE_ARMV8_CRC_CRYPTO_INTRINSICS)
if(HAVE_ARMV8_CRC_CRYPTO_INTRINSICS)
set(ARMV8_CRC_COMPILE_FLAGS "-march=armv8-a+crc+crypto")
set(HAVE_ARMV8_CRC TRUE)
set(HAVE_ARMV8_CRYPTO TRUE)
else()
check_c_compiler_flag(-march=armv8-a+crc HAVE_ARMV8_CRC)
check_c_compiler_flag(-march=armv8-a+crypto HAVE_ARMV8_CRYPTO)
if(HAVE_ARMV8_CRC)
set(ARMV8_CRC_COMPILE_FLAGS "-march=armv8-a+crc")
elseif(HAVE_ARMV8_CRYPTO)
set(ARMV8_CRC_COMPILE_FLAGS "-march=armv8-a+crypto")
endif()
endif()
CHECK_C_COMPILER_FLAG(-march=armv8-a+simd HAVE_ARMV8_SIMD)
if(HAVE_ARMV8_SIMD)
set(SIMD_COMPILE_FLAGS "${SIMD_COMPILE_FLAGS} -march=armv8-a+simd")
endif()
elseif(CMAKE_SYSTEM_PROCESSOR MATCHES "arm|ARM")
set(HAVE_ARM 1)
CHECK_C_COMPILER_FLAG(-mfpu=neon HAVE_ARM_NEON)
if(HAVE_ARM_NEON)
set(SIMD_COMPILE_FLAGS "${SIMD_COMPILE_FLAGS} -mfpu=neon")
endif()
elseif(CMAKE_SYSTEM_PROCESSOR MATCHES "i386|i686|amd64|x86_64|AMD64")
set(HAVE_INTEL 1)
if(CMAKE_SYSTEM_PROCESSOR MATCHES "i686|amd64|x86_64|AMD64")
CHECK_C_COMPILER_FLAG(-msse HAVE_INTEL_SSE)
if(HAVE_INTEL_SSE)
set(SIMD_COMPILE_FLAGS "${SIMD_COMPILE_FLAGS} -msse")
endif()
if(CMAKE_SYSTEM_PROCESSOR MATCHES "amd64|x86_64|AMD64")
CHECK_C_COMPILER_FLAG(-msse2 HAVE_INTEL_SSE2)
if(HAVE_INTEL_SSE2)
set(SIMD_COMPILE_FLAGS "${SIMD_COMPILE_FLAGS} -msse2")
endif()
CHECK_C_COMPILER_FLAG(-msse3 HAVE_INTEL_SSE3)
if(HAVE_INTEL_SSE3)
set(SIMD_COMPILE_FLAGS "${SIMD_COMPILE_FLAGS} -msse3")
endif()
CHECK_C_COMPILER_FLAG(-mssse3 HAVE_INTEL_SSSE3)
if(HAVE_INTEL_SSSE3)
set(SIMD_COMPILE_FLAGS "${SIMD_COMPILE_FLAGS} -mssse3")
endif()
CHECK_C_COMPILER_FLAG(-mpclmul HAVE_INTEL_PCLMUL)
if(HAVE_INTEL_PCLMUL)
set(SIMD_COMPILE_FLAGS "${SIMD_COMPILE_FLAGS} -mpclmul")
endif()
CHECK_C_COMPILER_FLAG(-msse4.1 HAVE_INTEL_SSE4_1)
if(HAVE_INTEL_SSE4_1)
set(SIMD_COMPILE_FLAGS "${SIMD_COMPILE_FLAGS} -msse4.1")
endif()
CHECK_C_COMPILER_FLAG(-msse4.2 HAVE_INTEL_SSE4_2)
if(HAVE_INTEL_SSE4_2)
set(SIMD_COMPILE_FLAGS "${SIMD_COMPILE_FLAGS} -msse4.2")
endif()
endif(CMAKE_SYSTEM_PROCESSOR MATCHES "amd64|x86_64|AMD64")
endif(CMAKE_SYSTEM_PROCESSOR MATCHES "i686|amd64|x86_64|AMD64")
elseif(CMAKE_SYSTEM_PROCESSOR MATCHES "(powerpc|ppc)")
if(CMAKE_SYSTEM_PROCESSOR MATCHES "(powerpc|ppc)64le")
set(HAVE_PPC64LE 1)
message(STATUS " we are ppc64le")
elseif(CMAKE_SYSTEM_PROCESSOR MATCHES "(powerpc|ppc)64")
set(HAVE_PPC64 1)
message(STATUS " we are ppc64")
else()
set(HAVE_PPC 1)
endif()
CHECK_C_COMPILER_FLAG("-maltivec" HAS_ALTIVEC)
if(HAS_ALTIVEC)
message(STATUS " HAS_ALTIVEC yes")
add_compile_options(-maltivec)
endif()
CHECK_C_COMPILER_FLAG("-mcpu=power8" HAVE_POWER8)
if(HAVE_POWER8)
message(STATUS " HAVE_POWER8 yes")
endif()
endif()
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