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From: | Gwenole Beauchesne |
Subject: | Re: [Qemu-devel] mini documentation of "info registers" output |
Date: | Sat, 2 Jul 2005 09:18:55 +0200 |
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.
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