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flat assembler > Main > Good / fast PRNG, for floats bonus

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cod3b453



Joined: 25 Aug 2004
Posts: 616
To be honest, I don't know how "fast"/"good-quality" these are (I don't have a machine I can test this on) but from a small and simple perspective the likes of chained AES or SHA instructions should provide a good sequence from a single instruction. The result could provide multiple random values per iteration and can then be normalised/rebased accordingly.

Code:
aesenc xmm0,xmm0
cvtdq2ps xmm1,xmm0
; ?
; profit

Something along these lines..may need some tweaking.
Post 24 Jan 2017, 19:55
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Furs



Joined: 04 Mar 2016
Posts: 759
Yes, thanks, I'm going to look into aesenc and others just for fun even if I don't end up using them (I guess they aren't so fast). Because I'm not really in the loop with all the new instructions so it's good exercise.
Post 25 Jan 2017, 13:41
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