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Re: [Qemu-devel] [PATCH] tcg-optimize: Fold sub r,0,x to neg r,x
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From: |
Blue Swirl |
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Subject: |
Re: [Qemu-devel] [PATCH] tcg-optimize: Fold sub r,0,x to neg r,x |
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Date: |
Wed, 20 Mar 2013 20:59:56 +0000 |
On Wed, Mar 20, 2013 at 12:13 AM, Richard Henderson <address@hidden> wrote:
> On 2013-02-23 08:43, Blue Swirl wrote:
>>>
>>> Signed-off-by: Richard Henderson<address@hidden>
>>> >---
>>> > tcg/optimize.c | 33 ++++++++++++++++++++++++++++++++-
>>> > 1 file changed, 32 insertions(+), 1 deletion(-)
>>> >
>>> >I noticed this while looking at other dumps. This seems like it
>>> >should be considered independently of the other patch series.
>>
>> This breaks Sparc32 boot, only a few first instructions are executed.
>>
>
> I can't replicate any failure with the sparc-test image.
> Can you expand on a method to replicate this?
It was just with qemu-system-sparc -d in_asm. Unpatched can get to
OpenBIOS prompt, patched does not leave boot mode, PC always < 0x6000.
>
>
> r~