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cmake: invoke the compiler to test arch features

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We require SSSE3, and optionally support AVX2, and the best way of testing
the compiler and compile flags is to run the compiler.
This commit is contained in:
Matthew Barr 2016-05-23 14:57:48 +10:00
parent ca2343f98e
commit 89bc2b4b39
2 changed files with 53 additions and 2 deletions
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13
CMakeLists.txt
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@ -237,6 +237,9 @@ if (RELEASE_BUILD)
endif()
endif()
# ensure we are building for the right target arch
include (${CMAKE_MODULE_PATH}/arch.cmake)
# testing a builtin takes a little more work
CHECK_C_SOURCE_COMPILES("void *aa_test(void *x) { return __builtin_assume_aligned(x, 16);}\nint main(void) { return 0; }" HAVE_CC_BUILTIN_ASSUME_ALIGNED)
CHECK_CXX_SOURCE_COMPILES("void *aa_test(void *x) { return __builtin_assume_aligned(x, 16);}\nint main(void) { return 0; }" HAVE_CXX_BUILTIN_ASSUME_ALIGNED)
@ -403,7 +406,6 @@ set (hs_exec_SRCS
src/fdr/flood_runtime.h
src/fdr/fdr_loadval.h
src/fdr/teddy.c
src/fdr/teddy_avx2.c
src/fdr/teddy.h
src/fdr/teddy_internal.h
src/fdr/teddy_runtime_common.h
@ -513,7 +515,6 @@ set (hs_exec_SRCS
src/util/fatbit.h
src/util/fatbit.c
src/util/join.h
src/util/masked_move.c
src/util/masked_move.h
src/util/multibit.h
src/util/multibit_internal.h
@ -540,6 +541,14 @@ set (hs_exec_SRCS
src/database.h
)
if (HAVE_AVX2)
set (hs_exec_SRCS
${hs_exec_SRCS}
src/fdr/teddy_avx2.c
src/util/masked_move.c
)
endif ()
SET (hs_SRCS
${hs_HEADERS}

42
cmake/arch.cmake Normal file
View File

@ -0,0 +1,42 @@
# detect architecture features
#
# must be called after determining where compiler intrinsics are defined
if (HAVE_C_X86INTRIN_H)
set (INTRIN_INC_H "x86intrin.h")
elseif (HAVE_C_INTRIN_H)
set (INTRIN_INC_H "intrin.h")
else ()
message (FATAL_ERROR "No intrinsics header found")
endif ()
set (CMAKE_REQUIRED_FLAGS "${CMAKE_C_FLAGS} ${EXTRA_C_FLAGS}")
# ensure we have the minimum of SSSE3 - call a SSSE3 intrinsic
CHECK_C_SOURCE_COMPILES("#include <${INTRIN_INC_H}>
int main() {
__m128i a = _mm_set1_epi8(1);
(void)_mm_shuffle_epi8(a, a);
}" HAVE_SSSE3)
if (NOT HAVE_SSSE3)
message(FATAL_ERROR "A minimum of SSSE3 compiler support is required")
endif ()
# now look for AVX2
CHECK_C_SOURCE_COMPILES("#include <${INTRIN_INC_H}>
#if !defined(__AVX2__)
#error no avx2
#endif
int main(){
__m256i z = _mm256_setzero_si256();
(void)_mm256_xor_si256(z, z);
}" HAVE_AVX2)
if (NOT HAVE_AVX2)
message(STATUS "Building without AVX2 support")
endif ()
unset (CMAKE_REQUIRED_FLAGS)
unset (INTRIN_INC_H)