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Re: [Qemu-devel] TCG debugging improvements
From: |
Blue Swirl |
Subject: |
Re: [Qemu-devel] TCG debugging improvements |
Date: |
Mon, 17 Nov 2008 22:08:31 +0200 |
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
Sparc32 and Sparc64 are fine, thanks for the fixes.