Re: [Qemu-devel] mini documentation of "info registers" output

[Gwenole Beauchesne]

Le samedi, 2 jul 2005, à 06:12 Europe/Paris, Mulyadi Santosa a écrit :

> hm, i see....BTW, these two lazy flags, CCS and CCD, they are the
> representation of EFLAGS?

CCS/CCD = Condition Codes Source/Destination values. Those represent 
part of the state (input and/or result + operation type) used to 
evaluate the EFLAGS, when necessary. Hence the term lazy evaluation of 
condition codes and they aren't in the EFLAGS format.

> anyway, it is safe to frequently ignore flags? For example, if MUL
> generate overflow and set Zero Flag, Qemu must be aware of it, right?
> Or we can still safely ignore it?

Liveness analysis of the EFLAGS bits is performed to determine where 
computation of EFLAGS is really needed.

Bye,
Gwenolé.