On Wed, Aug 30, 2006 at 11:51:58AM +0200, Johannes Berg wrote:
> On Wed, 2006-08-30 at 11:47 +0200, Martin Langer wrote:
> 
> > > -217b
> > > +218b
> 
> > Does the last bit of FFF belongs to G ? It would make more sense to me, 
> > but then we need a new definition for G.
> 
> Well, that doesn't make sense either because in the first two insns I
> quoted in binary it is:
> 
> -0b10000101111011
> +0b10000110001011
> 
> I think it's more likely that the last nibble of F belongs completely to
> something else or something...

Yep. The first 8 bits seem to be the opcode. In case of our famous 
0x378c it's only 0x37 which means "write" and the 8 is used for bit 
shifts. I just learned how to write different lengths between 8 and 16 
bits. They do work in this way:

0x370c  write 8 bits    (AA)
0x371c  write 9 bits    (AA + 1 bit from CC)
0x372c  write 10 bits   (AA + 2 bits from CC)
...
0x378c  write 16 bits   (AA + CC)

But 0x379c..0x37fc will always write 8 bits (CC).


Martin
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