github_mirrors/vectorscan
3
0
Fork 1
mirror of https://github.com/VectorCamp/vectorscan.git synced 2025-09-29 19:24:25 +03:00
Code Issues Packages Projects Releases Wiki Activity

cmake: Improve the microarch checks

Browse Source
This commit is contained in:
Matthew Barr
2017-06-07 11:16:30 +10:00
parent a6f4394959
commit 73765f1f84
2 changed files with 43 additions and 17 deletions
Download Patch File Download Diff File Expand all files Collapse all files

45
cmake/arch.cmake
View File

@@ -10,8 +10,24 @@ else ()
message (FATAL_ERROR "No intrinsics header found")
endif ()
if (BUILD_AVX512)
CHECK_C_COMPILER_FLAG(${SKYLAKE_FLAG} HAS_ARCH_SKYLAKE)
if (NOT HAS_ARCH_SKYLAKE)
message (FATAL_ERROR "AVX512 not supported by compiler")
endif ()
endif ()
set (CMAKE_REQUIRED_FLAGS "${CMAKE_C_FLAGS} ${EXTRA_C_FLAGS} ${ARCH_C_FLAGS}")
if (FAT_RUNTIME)
# test the highest level microarch to make sure everything works
if (BUILD_AVX512)
set (CMAKE_REQUIRED_FLAGS "${CMAKE_C_FLAGS} ${EXTRA_C_FLAGS} ${SKYLAKE_FLAG}")
else ()
set (CMAKE_REQUIRED_FLAGS "${CMAKE_C_FLAGS} ${EXTRA_C_FLAGS} -march=core-avx2")
endif ()
else (NOT FAT_RUNTIME)
# if not fat runtime, then test given cflags
set (CMAKE_REQUIRED_FLAGS "${CMAKE_C_FLAGS} ${EXTRA_C_FLAGS} ${ARCH_C_FLAGS}")
endif ()
# ensure we have the minimum of SSSE3 - call a SSSE3 intrinsic
CHECK_C_SOURCE_COMPILES("#include <${INTRIN_INC_H}>
@@ -31,10 +47,6 @@ int main(){
(void)_mm256_xor_si256(z, z);
}" HAVE_AVX2)
if (NOT HAVE_AVX2)
message(STATUS "Building without AVX2 support")
endif ()
# and now for AVX512
CHECK_C_SOURCE_COMPILES("#include <${INTRIN_INC_H}>
#if !defined(__AVX512BW__)
@@ -46,8 +58,27 @@ int main(){
(void)_mm512_abs_epi8(z);
}" HAVE_AVX512)
if (NOT HAVE_AVX512)
message(STATUS "Building without AVX512 support")
if (FAT_RUNTIME)
if (NOT HAVE_SSSE3)
message(FATAL_ERROR "SSSE3 support required to build fat runtime")
endif ()
if (NOT HAVE_AVX2)
message(FATAL_ERROR "AVX2 support required to build fat runtime")
endif ()
if (BUILD_AVX512 AND NOT HAVE_AVX512)
message(FATAL_ERROR "AVX512 support requested but not supported")
endif ()
else (NOT FAT_RUNTIME)
if (NOT HAVE_AVX2)
message(STATUS "Building without AVX2 support")
endif ()
if (NOT HAVE_AVX512)
message(STATUS "Building without AVX512 support")
endif ()
else (NOT FAT_RUNTIME)
if (NOT HAVE_SSSE3)
message(FATAL_ERROR "A minimum of SSSE3 compiler support is required")
endif ()
endif ()
unset (CMAKE_REQUIRED_FLAGS)