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detect double precision support according to OpenCL specs (1.2 and later)

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This commit is contained in:
Axel Kohlmeyer
2021-09-25 07:20:52 -04:00
parent 24c9bd4cd2
commit 530912a930
1 changed files with 10 additions and 4 deletions
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14
lib/gpu/geryon/ocl_device.h
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@ -556,16 +556,22 @@ void UCL_Device::add_properties(cl_device_id device_list) {
sizeof(float_width),&float_width,nullptr));
op.preferred_vector_width32=float_width;
// Determine if double precision is supported
cl_uint double_width;
CL_SAFE_CALL(clGetDeviceInfo(device_list,
CL_DEVICE_PREFERRED_VECTOR_WIDTH_DOUBLE,
sizeof(double_width),&double_width,nullptr));
op.preferred_vector_width64=double_width;
if (double_width==0)
op.double_precision=false;
else
// Determine if double precision is supported: All bits in the mask must be set.
cl_device_fp_config double_mask = (CL_FP_FMA|CL_FP_ROUND_TO_NEAREST|CL_FP_ROUND_TO_ZERO|
CL_FP_ROUND_TO_INF|CL_FP_INF_NAN|CL_FP_DENORM);
cl_device_fp_config double_avail;
CL_SAFE_CALL(clGetDeviceInfo(device_list,CL_DEVICE_DOUBLE_FP_CONFIG,
sizeof(double_avail),&double_avail,nullptr));
if (((double_avail & double_mask) ^ double_mask) == 0)
op.double_precision=true;
else
op.double_precision=false;
CL_SAFE_CALL(clGetDeviceInfo(device_list,
CL_DEVICE_PROFILING_TIMER_RESOLUTION,