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Re: [Qemu-devel] TCG debugging improvements


From: Andreas Färber
Subject: Re: [Qemu-devel] TCG debugging improvements
Date: Mon, 17 Nov 2008 22:00:47 +0100


Am 17.11.2008 um 21:08 schrieb Blue Swirl:

On 11/17/08, Paul Brook <address@hidden> wrote:
I'd just applied changes that enforce type size checking for TCG variables
when DEBUG_TCGV is defined. This should help avoid subtle bugs due to
64/32-bit mismatches.

I fixed a few bugs in the process, but it's mostly mechanical changes. TCGv is target_ulong sized, so the majority of code remains unchanged. Explicit sizes are typically only required when working with different sized ops, or
floating point.

One of the main side-effects of this is that helper functions now need to be declared properly. Previously we sort-of did this, but not consistently enough to enforce types. With the exception of the SSE/MMX ops (which are
table driven and use messy typecasts) we should be able to detect
inconsistencies between the code generator and the helper function
implementations.

There should be no functional changes. I've tested what I can, but please
test your favourite host/target.

PPC is broken. This used to print something, now it doesn't:
./qemu-system-ppc -L ./pc-bios/ -hda /dev/null

ppc64 mixed tl and i64 in some places, possibly also ppc tl and i32 for SPE, maybe that's why?





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