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https://github.com/ceph/ceph
synced 2024-12-26 05:25:09 +00:00
e70ab48b7f
The used compiler may or may not be recent enough to recognize the crc32 extended cpu type. However, it does not really have to know about them either, since all we do is pass inline assembly instructions to the assembler. This patch moves the crc cpu extension detection from compiler based to assembler based, so that we can build optimized code even when the compiler does not know about the cpu type yet. Fixes: http://tracker.ceph.com/issues/17516 Signed-off-by: Alexander Graf <agraf@suse.de>
75 lines
2.3 KiB
CMake
75 lines
2.3 KiB
CMake
# detect SIMD extentions
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#
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# HAVE_ARMV8_CRC
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# HAVE_ARMV8_SIMD
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# HAVE_ARM_NEON
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# HAVE_INTEL_SSE
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# HAVE_INTEL_SSE2
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# HAVE_INTEL_SSE3
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# HAVE_INTEL_SSSE3
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# HAVE_INTEL_PCLMUL
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# HAVE_INTEL_SSE4_1
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# HAVE_INTEL_SSE4_2
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#
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# SIMD_COMPILE_FLAGS
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#
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if(CMAKE_SYSTEM_PROCESSOR MATCHES "aarch64|AARCH64")
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set(HAVE_ARM 1)
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set(save_quiet ${CMAKE_REQUIRED_QUIET})
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set(CMAKE_REQUIRED_QUIET true)
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include(CheckCXXSourceCompiles)
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check_cxx_source_compiles("
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#define CRC32CX(crc, value) __asm__(\"crc32cx %w[c], %w[c], %x[v]\":[c]\"+r\"(crc):[v]\"r\"(value))
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asm(\".arch_extension crc\");
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unsigned int foo(unsigned int ret) {
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CRC32CX(ret, 0);
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return ret;
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}
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int main() { foo(0); }" HAVE_ARMV8_CRC)
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set(CMAKE_REQUIRED_QUIET ${save_quiet})
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if(HAVE_ARMV8_CRC)
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message(STATUS " aarch64 crc extensions supported")
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endif()
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CHECK_C_COMPILER_FLAG(-march=armv8-a+simd HAVE_ARMV8_SIMD)
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if(HAVE_ARMV8_SIMD)
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set(SIMD_COMPILE_FLAGS "${SIMD_COMPILE_FLAGS} -march=armv8-a+simd")
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endif()
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elseif(CMAKE_SYSTEM_PROCESSOR MATCHES "arm|ARM")
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set(HAVE_ARM 1)
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CHECK_C_COMPILER_FLAG(-mfpu=neon HAVE_ARM_NEON)
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if(HAVE_ARM_NEON)
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set(SIMD_COMPILE_FLAGS "${SIMD_COMPILE_FLAGS} -mfpu=neon")
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endif()
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elseif(CMAKE_SYSTEM_PROCESSOR MATCHES "i386|i686|amd64|x86_64|AMD64")
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set(HAVE_INTEL 1)
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CHECK_C_COMPILER_FLAG(-msse HAVE_INTEL_SSE)
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if(HAVE_INTEL_SSE)
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set(SIMD_COMPILE_FLAGS "${SIMD_COMPILE_FLAGS} -msse")
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endif()
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CHECK_C_COMPILER_FLAG(-msse2 HAVE_INTEL_SSE2)
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if(HAVE_INTEL_SSE2)
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set(SIMD_COMPILE_FLAGS "${SIMD_COMPILE_FLAGS} -msse2")
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endif()
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CHECK_C_COMPILER_FLAG(-msse3 HAVE_INTEL_SSE3)
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if(HAVE_INTEL_SSE3)
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set(SIMD_COMPILE_FLAGS "${SIMD_COMPILE_FLAGS} -msse3")
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endif()
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CHECK_C_COMPILER_FLAG(-mssse3 HAVE_INTEL_SSSE3)
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if(HAVE_INTEL_SSSE3)
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set(SIMD_COMPILE_FLAGS "${SIMD_COMPILE_FLAGS} -mssse3")
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endif()
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CHECK_C_COMPILER_FLAG(-mpclmul HAVE_INTEL_PCLMUL)
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if(HAVE_INTEL_PCLMUL)
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set(SIMD_COMPILE_FLAGS "${SIMD_COMPILE_FLAGS} -mpclmul")
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endif()
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CHECK_C_COMPILER_FLAG(-msse4.1 HAVE_INTEL_SSE4_1)
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if(HAVE_INTEL_SSE4_1)
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set(SIMD_COMPILE_FLAGS "${SIMD_COMPILE_FLAGS} -msse4.1")
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endif()
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CHECK_C_COMPILER_FLAG(-msse4.2 HAVE_INTEL_SSE4_2)
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if(HAVE_INTEL_SSE4_2)
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set(SIMD_COMPILE_FLAGS "${SIMD_COMPILE_FLAGS} -msse4.2")
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endif()
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endif()
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