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Fix f16 check by umar456 · Pull Request #2773 · arrayfire/arrayfire · GitHub

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Fix f16 check #2773

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Merged
umar456 merged 3 commits into from
Feb 21, 2020
Conversation 0 Commits 3 Checks 0 Files changed
Merged

Fix f16 check #2773

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0cdcab3
Fix the check for f16 capability on hardware in OpenCL
umar456 Feb 20, 2020
db3518b
Move verifyTypeSupport to Array.cpp in OpenCL
umar456 Feb 20, 2020
d37b174
Only print verbose messages in FindMKL if they are supported
umar456 Feb 20, 2020
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16 changes: 12 additions & 4 deletions CMakeModules/FindMKL.cmake
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Original file line number Diff line number Diff line change
Expand Up @@ -167,10 +167,14 @@ endif()

if(WIN32)
set(ENV_LIBRARY_PATHS "$ENV{LIB}")
message(VERBOSE "MKL environment variable(LIB): ${ENV_LIBRARY_PATHS}")
if (${CMAKE_VERSION} VERSION_GREATER 3.14)
message(VERBOSE "MKL environment variable(LIB): ${ENV_LIBRARY_PATHS}")
endif()
else()
string(REGEX REPLACE ":" ";" ENV_LIBRARY_PATHS "$ENV{LIBRARY_PATH}")
message(VERBOSE "MKL environment variable(LIBRARY_PATH): ${ENV_LIBRARY_PATHS}")
if (${CMAKE_VERSION} VERSION_GREATER 3.14)
message(VERBOSE "MKL environment variable(LIBRARY_PATH): ${ENV_LIBRARY_PATHS}")
endif()
endif()

# Finds and creates libraries for MKL with the MKL:: prefix
Expand Down Expand Up @@ -225,7 +229,9 @@ function(find_mkl_library)
intel64
intel64/gcc4.7)
if(MKL_${mkl_args_NAME}_LINK_LIBRARY)
message(VERBOSE "MKL_${mkl_args_NAME}_LINK_LIBRARY: ${MKL_${mkl_args_NAME}_LINK_LIBRARY}")
if (CMAKE_VERSION VERSION_GREATER 3.14)
message(VERBOSE "MKL_${mkl_args_NAME}_LINK_LIBRARY: ${MKL_${mkl_args_NAME}_LINK_LIBRARY}")
endif()
mark_as_advanced(MKL_${mkl_args_NAME}_LINK_LIBRARY)
endif()
endif()
Expand All @@ -252,7 +258,9 @@ function(find_mkl_library)
IntelSWTools/compilers_and_libraries/windows/tbb/lib/intel64/${msvc_dir}
)
if(MKL_${mkl_args_NAME}_STATIC_LINK_LIBRARY)
message(VERBOSE "MKL_${mkl_args_NAME}_STATIC_LINK_LIBRARY: ${MKL_${mkl_args_NAME}_STATIC_LINK_LIBRARY}")
if (CMAKE_VERSION VERSION_GREATER 3.14)
message(VERBOSE "MKL_${mkl_args_NAME}_STATIC_LINK_LIBRARY: ${MKL_${mkl_args_NAME}_STATIC_LINK_LIBRARY}")
endif()
mark_as_advanced(MKL_${mkl_args_NAME}_STATIC_LINK_LIBRARY)
endif()
endif()
Expand Down
28 changes: 28 additions & 0 deletions src/backend/opencl/Array.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -47,6 +47,34 @@ Node_ptr bufferNodePtr() {
shortname<T>(true));
}

namespace {
template<typename T>
void verifyTypeSupport() {
return;
}

template<>
void verifyTypeSupport<double>() {
if (!isDoubleSupported(getActiveDeviceId())) {
AF_ERROR("Double precision not supported", AF_ERR_NO_DBL);
}
}

template<>
void verifyTypeSupport<cdouble>() {
if (!isDoubleSupported(getActiveDeviceId())) {
AF_ERROR("Double precision not supported", AF_ERR_NO_DBL);
}
}

template<>
void verifyTypeSupport<common::half>() {
if (!isHalfSupported(getActiveDeviceId())) {
AF_ERROR("Half precision not supported", AF_ERR_NO_HALF);
}
}
} // namespace

template<typename T>
Array<T>::Array(dim4 dims)
: info(getActiveDeviceId(), dims, 0, calcStrides(dims),
Expand Down
13 changes: 0 additions & 13 deletions src/backend/opencl/err_opencl.hpp
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Expand Up @@ -20,16 +20,3 @@
throw SupportError(__PRETTY_FUNCTION__, __AF_FILENAME__, __LINE__, \
message, boost::stacktrace::stacktrace()); \
} while (0)

namespace opencl {
template<typename T>
void verifyTypeSupport() {
if ((std::is_same<T, double>::value || std::is_same<T, cdouble>::value) &&
!isDoubleSupported(getActiveDeviceId())) {
AF_ERROR("Double precision not supported", AF_ERR_NO_DBL);
} else if (std::is_same<T, common::half>::value &&
!isHalfSupported(getActiveDeviceId())) {
AF_ERROR("Half precision not supported", AF_ERR_NO_HALF);
}
}
} // namespace opencl
17 changes: 15 additions & 2 deletions src/backend/opencl/platform.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -332,7 +332,7 @@ bool isDoubleSupported(int device) {
dev = *devMngr.mDevices[device];
}

return (dev.getInfo<CL_DEVICE_PREFERRED_VECTOR_WIDTH_DOUBLE>() > 0);
return (dev.getInfo<CL_DEVICE_DOUBLE_FP_CONFIG>() > 0);
}

bool isHalfSupported(int device) {
Expand All @@ -343,7 +343,20 @@ bool isHalfSupported(int device) {
common::lock_guard_t lock(devMngr.deviceMutex);
dev = *devMngr.mDevices[device];
}
return (dev.getInfo<CL_DEVICE_PREFERRED_VECTOR_WIDTH_HALF>() > 0);
cl_device_fp_config config = 0;
size_t ret_size = 0;
// NVIDIA OpenCL seems to return error codes for CL_DEVICE_HALF_FP_CONFIG.
// It seems to be a bug in their implementation. Assuming if this function
// fails that the implemenation does not support f16 type. Using the C API
// to avoid exceptions
cl_int err =
clGetDeviceInfo(dev(), CL_DEVICE_HALF_FP_CONFIG,
sizeof(cl_device_fp_config), &config, &ret_size);

if (err)
return false;
else
return config > 0;
}

void devprop(char* d_name, char* d_platform, char* d_toolkit, char* d_compute) {
Expand Down
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