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Add RISC-V target detection #75

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188 changes: 114 additions & 74 deletions CMakeLists.txt
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Original file line number Diff line number Diff line change
Expand Up @@ -69,6 +69,26 @@ option(CRC32C_BUILD_BENCHMARKS "Build CRC32C's benchmarks" ON)
option(CRC32C_USE_GLOG "Build CRC32C's tests with Google Logging" ON)
option(CRC32C_INSTALL "Install CRC32C's header and library" ON)

set(CRC32C_TARGET_X86 0)
set(CRC32C_TARGET_ARM64 0)
set(CRC32C_TARGET_RISCV 0)
set(CRC32C_TARGET_PROCESSOR "${CMAKE_SYSTEM_PROCESSOR}")
if(NOT CRC32C_TARGET_PROCESSOR AND NOT CMAKE_CROSSCOMPILING)
set(CRC32C_TARGET_PROCESSOR "${CMAKE_HOST_SYSTEM_PROCESSOR}")
endif()
string(TOLOWER "${CRC32C_TARGET_PROCESSOR}" CRC32C_TARGET_PROCESSOR_LOWER)
string(TOLOWER "${CMAKE_CXX_COMPILER_TARGET}" CRC32C_CXX_COMPILER_TARGET_LOWER)
if(CRC32C_TARGET_PROCESSOR_LOWER MATCHES "riscv" OR
CRC32C_CXX_COMPILER_TARGET_LOWER MATCHES "riscv")
set(CRC32C_TARGET_RISCV 1)
elseif(CRC32C_TARGET_PROCESSOR_LOWER MATCHES "^(x86_64|amd64|i[3-6]86|x86)$" OR
CRC32C_CXX_COMPILER_TARGET_LOWER MATCHES "^(x86_64|amd64|i[3-6]86|x86)")
set(CRC32C_TARGET_X86 1)
elseif(CRC32C_TARGET_PROCESSOR_LOWER MATCHES "^(aarch64|arm64)$" OR
CRC32C_CXX_COMPILER_TARGET_LOWER MATCHES "^(aarch64|arm64)")
set(CRC32C_TARGET_ARM64 1)
endif()

include(TestBigEndian)
test_big_endian(BYTE_ORDER_BIG_ENDIAN)

Expand Down Expand Up @@ -96,88 +116,108 @@ int main() {

# Check for _mm_prefetch support in the compiler.
include(CheckCXXSourceCompiles)
check_cxx_source_compiles("
#if defined(_MSC_VER)
#include <intrin.h>
#else // !defined(_MSC_VER)
#include <xmmintrin.h>
#endif // defined(_MSC_VER)

int main() {
char data = 0;
const char* address = &data;
_mm_prefetch(address, _MM_HINT_NTA);
return 0;
}
" HAVE_MM_PREFETCH)
if(CRC32C_TARGET_X86)
check_cxx_source_compiles("
#if defined(_MSC_VER)
#include <intrin.h>
#else // !defined(_MSC_VER)
#include <xmmintrin.h>
#endif // defined(_MSC_VER)

int main() {
char data = 0;
const char* address = &data;
_mm_prefetch(address, _MM_HINT_NTA);
return 0;
}
" HAVE_MM_PREFETCH)
else()
set(HAVE_MM_PREFETCH 0)
endif()

# Check for SSE4.2 support in the compiler.
set(OLD_CMAKE_REQURED_FLAGS ${CMAKE_REQUIRED_FLAGS})
if(CMAKE_CXX_COMPILER_ID STREQUAL "MSVC")
set(CMAKE_REQUIRED_FLAGS "${CMAKE_REQUIRED_FLAGS} /arch:AVX")
else(CMAKE_CXX_COMPILER_ID STREQUAL "MSVC")
set(CMAKE_REQUIRED_FLAGS "${CMAKE_REQUIRED_FLAGS} -msse4.2")
endif(CMAKE_CXX_COMPILER_ID STREQUAL "MSVC")
check_cxx_source_compiles("
#if defined(_MSC_VER)
#include <intrin.h>
#else // !defined(_MSC_VER)
#include <cpuid.h>
#include <nmmintrin.h>
#endif // defined(_MSC_VER)

int main() {
_mm_crc32_u8(0, 0); _mm_crc32_u32(0, 0);
#if defined(_M_X64) || defined(__x86_64__)
_mm_crc32_u64(0, 0);
#endif // defined(_M_X64) || defined(__x86_64__)
return 0;
}
" HAVE_SSE42)
set(CMAKE_REQUIRED_FLAGS ${OLD_CMAKE_REQURED_FLAGS})
if(CRC32C_TARGET_X86)
set(OLD_CMAKE_REQURED_FLAGS ${CMAKE_REQUIRED_FLAGS})
if(CMAKE_CXX_COMPILER_ID STREQUAL "MSVC")
set(CMAKE_REQUIRED_FLAGS "${CMAKE_REQUIRED_FLAGS} /arch:AVX")
else(CMAKE_CXX_COMPILER_ID STREQUAL "MSVC")
set(CMAKE_REQUIRED_FLAGS "${CMAKE_REQUIRED_FLAGS} -msse4.2")
endif(CMAKE_CXX_COMPILER_ID STREQUAL "MSVC")
check_cxx_source_compiles("
#if defined(_MSC_VER)
#include <intrin.h>
#else // !defined(_MSC_VER)
#include <cpuid.h>
#include <nmmintrin.h>
#endif // defined(_MSC_VER)

int main() {
_mm_crc32_u8(0, 0); _mm_crc32_u32(0, 0);
#if defined(_M_X64) || defined(__x86_64__)
_mm_crc32_u64(0, 0);
#endif // defined(_M_X64) || defined(__x86_64__)
return 0;
}
" HAVE_SSE42)
set(CMAKE_REQUIRED_FLAGS ${OLD_CMAKE_REQURED_FLAGS})
else()
set(HAVE_SSE42 0)
endif()

# Check for ARMv8 w/ CRC and CRYPTO extensions support in the compiler.
set(OLD_CMAKE_REQURED_FLAGS ${CMAKE_REQUIRED_FLAGS})
if(CMAKE_CXX_COMPILER_ID STREQUAL "MSVC")
# TODO(pwnall): Insert correct flag when VS gets ARM CRC32C support.
set(CMAKE_REQUIRED_FLAGS "${CMAKE_REQUIRED_FLAGS} /arch:NOTYET")
else(CMAKE_CXX_COMPILER_ID STREQUAL "MSVC")
set(CMAKE_REQUIRED_FLAGS "${CMAKE_REQUIRED_FLAGS} -march=armv8-a+crc+crypto")
endif(CMAKE_CXX_COMPILER_ID STREQUAL "MSVC")
check_cxx_source_compiles("
#include <arm_acle.h>
#include <arm_neon.h>

int main() {
__crc32cb(0, 0); __crc32ch(0, 0); __crc32cw(0, 0); __crc32cd(0, 0);
vmull_p64(0, 0);
return 0;
}
" HAVE_ARM64_CRC32C)
set(CMAKE_REQUIRED_FLAGS ${OLD_CMAKE_REQURED_FLAGS})
if(CRC32C_TARGET_ARM64)
set(OLD_CMAKE_REQURED_FLAGS ${CMAKE_REQUIRED_FLAGS})
if(CMAKE_CXX_COMPILER_ID STREQUAL "MSVC")
# TODO(pwnall): Insert correct flag when VS gets ARM CRC32C support.
set(CMAKE_REQUIRED_FLAGS "${CMAKE_REQUIRED_FLAGS} /arch:NOTYET")
else(CMAKE_CXX_COMPILER_ID STREQUAL "MSVC")
set(CMAKE_REQUIRED_FLAGS "${CMAKE_REQUIRED_FLAGS} -march=armv8-a+crc+crypto")
endif(CMAKE_CXX_COMPILER_ID STREQUAL "MSVC")
check_cxx_source_compiles("
#include <arm_acle.h>
#include <arm_neon.h>

int main() {
__crc32cb(0, 0); __crc32ch(0, 0); __crc32cw(0, 0); __crc32cd(0, 0);
vmull_p64(0, 0);
return 0;
}
" HAVE_ARM64_CRC32C)
set(CMAKE_REQUIRED_FLAGS ${OLD_CMAKE_REQURED_FLAGS})
else()
set(HAVE_ARM64_CRC32C 0)
endif()

# Check for strong getauxval() support in the system headers.
check_cxx_source_compiles("
#include <arm_acle.h>
#include <arm_neon.h>
#include <sys/auxv.h>

int main() {
getauxval(AT_HWCAP);
return 0;
}
" HAVE_STRONG_GETAUXVAL)
if(CRC32C_TARGET_ARM64)
check_cxx_source_compiles("
#include <arm_acle.h>
#include <arm_neon.h>
#include <sys/auxv.h>

int main() {
getauxval(AT_HWCAP);
return 0;
}
" HAVE_STRONG_GETAUXVAL)
else()
set(HAVE_STRONG_GETAUXVAL 0)
endif()

# Check for weak getauxval() support in the compiler.
check_cxx_source_compiles("
unsigned long getauxval(unsigned long type) __attribute__((weak));
#define AT_HWCAP 16

int main() {
getauxval(AT_HWCAP);
return 0;
}
" HAVE_WEAK_GETAUXVAL)
if(CRC32C_TARGET_ARM64)
check_cxx_source_compiles("
unsigned long getauxval(unsigned long type) __attribute__((weak));
#define AT_HWCAP 16

int main() {
getauxval(AT_HWCAP);
return 0;
}
" HAVE_WEAK_GETAUXVAL)
else()
set(HAVE_WEAK_GETAUXVAL 0)
endif()

if(CRC32C_USE_GLOG)
# glog requires this setting to avoid using dynamic_cast.
Expand Down
3 changes: 3 additions & 0 deletions src/crc32c_config.h.in
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Original file line number Diff line number Diff line change
Expand Up @@ -8,6 +8,9 @@
// Define to 1 if building for a big-endian platform.
#cmakedefine01 BYTE_ORDER_BIG_ENDIAN

// Define to 1 when targeting RISC-V and using the portable implementation.
#cmakedefine01 CRC32C_TARGET_RISCV

// Define to 1 if the compiler has the __builtin_prefetch intrinsic.
#cmakedefine01 HAVE_BUILTIN_PREFETCH

Expand Down