Random Numbers

[britlion]

Boriel, I know the compiler's pseudorandom number generator is better than the one in the ROM.

Seen this:

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?

If it's smaller, faster or better, you might want to consider

For posterity, an 8 bit result with 32 bit seed that passes diehard test for 32 bit entropy:

Code:

rnd ld hl,0xA280 ; xz -> yw ld de,0xC0DE ; yw -> zt ld (rnd+1),de ; x = y, z = w ld a,e ; w = w ^ ( w << 3 ) add a,a add a,a add a,a xor e ld e,a ld a,h ; t = x ^ (x << 1) add a,a xor h ld d,a rra ; t = t ^ (t >> 1) ^ w xor d xor e ld h,l ; y = z ld l,a ; w = t ld (rnd+4),hl ret