Use Float32 in examples with backends that don't support Float64

Author: christiangnrd

examples/memcopy.jl

@@ -16,8 +16,8 @@ function mycopy!(A, B)
     return
 end
 
-A = KernelAbstractions.zeros(backend, Float64, 128, 128)
-B = KernelAbstractions.ones(backend, Float64, 128, 128)
+A = KernelAbstractions.zeros(backend, f_type, 128, 128)
+B = KernelAbstractions.ones(backend, f_type, 128, 128)
 mycopy!(A, B)
 KernelAbstractions.synchronize(backend)
 @test A == B

examples/memcopy_static.jl

@@ -16,8 +16,8 @@ function mycopy_static!(A, B)
     return
 end
 
-A = KernelAbstractions.zeros(backend, Float64, 128, 128)
-B = KernelAbstractions.ones(backend, Float64, 128, 128)
+A = KernelAbstractions.zeros(backend, f_type, 128, 128)
+B = KernelAbstractions.ones(backend, f_type, 128, 128)
 mycopy_static!(A, B)
 KernelAbstractions.synchronize(backend)
 @test A == B

examples/utils.jl

@@ -7,3 +7,5 @@ if Base.find_package("CUDA") !== nothing
 else
     const backend = CPU()
 end
+
+const f_type = KernelAbstractions.supports_float64(backend) ? Float64 : Float32