Rep:[f-cpu] New snapshot for EU_INC and EU_CMP

["Nicolas Boulay" <nicolas.boulay@ifrance.com>]

-----Message d'origine-----
De: Etienne LABARRE <etienne.labarre@gadz.org>
A: f-cpu english ML <f-cpu@seul.org>
Date: 29/07/02
Objet: [f-cpu] New snapshot for EU_INC and EU_CMP

Hi all,

New snapshot include a lot of changes and features :

INC unit and CMP unit are now two different units, for simplify and
decrease latency

Both units are based to the same component : find_lsb
 It's a binary tree for find the first null lsb in a word.
 It supports SIMD operations (size of chunk = 8, 16, 32, 64, 128, 256
 bits)

>>>> ??? oups ! I think we will go to ever more confusing. F-cpu should
always have 5 chunk size (8-16-32-64&128( for future long double)) and
should have some instruction for the whole register like you're 256 bits
(which is in fact all the bits). So chunk are 5 and fixed (intra-chunk
operation) but the register size are not fixed and we need inter-chunk
operation (where the *number* of chunk isn't given).

nicO

 
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