Beispiel #1
0
func ExampleFFT1D() {
	N := 8

	hostIn := make([]float32, N)
	hostIn[0] = 1

	devIn := cu.MemAlloc(int64(len(hostIn)) * cu.SIZEOF_FLOAT32)
	defer cu.MemFree(&devIn)
	cu.MemcpyHtoD(devIn, unsafe.Pointer(&hostIn[0]), devIn.Bytes())

	hostOut := make([]complex64, N/2+1)
	devOut := cu.MemAlloc(int64(len(hostOut)) * cu.SIZEOF_COMPLEX64)
	defer cu.MemFree(&devOut)

	plan := Plan1d(N, R2C, 1)
	defer plan.Destroy()
	plan.ExecR2C(devIn, devOut)

	cu.MemcpyDtoH(unsafe.Pointer(&hostOut[0]), devOut, devOut.Bytes())

	fmt.Println("hostIn:", hostIn)
	fmt.Println("hostOut:", hostOut)

	// Output:
	// hostIn: [1 0 0 0 0 0 0 0]
	// hostOut: [(1+0i) (+1+0i) (+1+0i) (+1-0i) (+1+0i)]
}
Beispiel #2
0
func (dst *slice) copyHtoD(src unsafe.Pointer, srclen int, elemsize int) {
	if srclen != dst.Len() {
		panic(fmt.Errorf("cuda4/safe: len mismatch: len(src)=%v (host), dst.Len()=%v (device)", srclen, dst.Len()))
	}
	cu.MemcpyHtoD(dst.Pointer(), src, int64(elemsize)*int64(srclen))
}