I read in CCodeGenerator>>computeKernelReturnTypes
fetchFloatAt:into: #float storeFloatAt:from: #float
fetchFloatAtPointer:into: #float storeFloatAtPointer:from:
#float
fetchSingleFloatAt:into: #float storeSingleFloatAt:from: #float
fetchSingleFloatAtPointer:into: #float
storeSingleFloatAtPointer:from: #float
Ain't these #double?