[sdiy] Best software noise algorithm?

[Rainer Buchty]

On Thu, 18 Feb 2010, Antti Huovilainen wrote:

> Example code for the in-loop part follows:
> ; calculate seed = (seed * a + c) & 65535
> ; w0 = seed
> ; w1 = temp
> ; w2 = a = 20077
> ; w3 = c = 12345
>
> ; setup
> mov     w2, 20077
> mov     w3, 12345
>
> ; loop
> mul.uu  w0, w2, w0
> add     w0, w3, w0

And where does w1 come into play here?

Is it
 	mul.uu w1,w2,w0
 	add w0,w3,w1

or was w1 just testing the attention of your readers? :)

Rainer