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Merge pull request #24168 from tchaikov/wip-17516

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cmake: detect armv8 crc and crypto feature using CHECK_C_COMPILER_FLAG

Reviewed-by: Josh Durgin <jdurgin@redhat.com>
This commit is contained in:
Josh Durgin 2018-10-04 16:10:18 -07:00 committed by GitHub
commit 8f826e146c
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1 changed files with 13 additions and 41 deletions
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54
cmake/modules/SIMDExt.cmake
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@ -16,49 +16,21 @@
if(CMAKE_SYSTEM_PROCESSOR MATCHES "aarch64|AARCH64")
set(HAVE_ARM 1)
set(save_quiet ${CMAKE_REQUIRED_QUIET})
set(CMAKE_REQUIRED_QUIET true)
include(CheckCXXSourceCompiles)
check_cxx_source_compiles("
#define CRC32CX(crc, value) __asm__(\"crc32cx %w[c], %w[c], %x[v]\":[c]\"+r\"(crc):[v]\"r\"(value))
asm(\".arch_extension crc\");
unsigned int foo(unsigned int ret) {
CRC32CX(ret, 0);
return ret;
}
int main() { foo(0); }" HAVE_ARMV8_CRC)
check_cxx_source_compiles("
asm(\".arch_extension crypto\");
unsigned int foo(unsigned int ret) {
__asm__(\"pmull v2.1q, v2.1d, v1.1d\");
return ret;
}
int main() { foo(0); }" HAVE_ARMV8_CRYPTO)
set(CMAKE_REQUIRED_QUIET ${save_quiet})
if(HAVE_ARMV8_CRC)
message(STATUS " aarch64 crc extensions supported")
endif()
if(HAVE_ARMV8_CRYPTO)
message(STATUS " aarch64 crypto extensions supported")
endif()
CHECK_C_COMPILER_FLAG(-march=armv8-a+crc+crypto HAVE_ARMV8_CRC_CRYPTO_MARCH)
# don't believe only the -march support; gcc 4.8.5 on RHEL/CentOS says
# it supports +crc but hasn't got the intrinsics or arm_acle.h. Test for
# the actual presence of one of the intrinsic functions.
if(HAVE_ARMV8_CRC_CRYPTO_MARCH)
check_cxx_source_compiles("
#include <inttypes.h>
int main() { uint32_t a; uint8_t b; __builtin_aarch64_crc32b(a, b); }
" HAVE_ARMV8_CRC_CRYPTO_INTRINSICS)
endif()
include(CheckCCompilerFlag)
check_c_compiler_flag(-march=armv8-a+crc+crypto HAVE_ARMV8_CRC_CRYPTO_INTRINSICS)
if(HAVE_ARMV8_CRC_CRYPTO_INTRINSICS)
message(STATUS " aarch64 crc+crypto intrinsics supported")
set(ARMV8_CRC_COMPILE_FLAGS "${ARMV8_CRC_COMPILE_FLAGS} -march=armv8-a+crc+crypto")
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)