Re: [Qemu-devel] [PATCH] Softfloat: Add support to softfloat to return floatxx_default_nan when the corresponding target status flag is set.

[Christophe Lyon <christophe.lyon@st.com>]

On 04.02.2011 20:47, Aurelien Jarno wrote:
> On Fri, Feb 04, 2011 at 02:44:48PM +0000, Peter Maydell wrote:
>> On 4 February 2011 14:01, Christophe Lyon <christophe.lyon@st.com> wrote:
>>
>> The target-specific #ifdef is pretty ugly.
I wanted to be safe (not breaking other targets), and as there are already some #ifdef in the same file, it seemed acceptable ;-)


> 
> I confirm that the same bug is present on SH4 (tested on real hardware),
> so the same fix is needed there. Thanks for catching that. Can you
> please resend your patch without the #ifdef?
> 
OK

>> (cc'ing Aurelien to check since he's the SH4 maintainer.)
>>
>> I also think the change is simple enough that we ought to do
>> it consistently for the floatx80 and float128 functions even if
>> neither ARM nor sh4 use them.
>>
> 
> Agreed.
> 
OK.

I was also wondering about the float16 case? The ARM ARM describes it uses default_nan too, but I couldn't find that right piece of code to patch in softfloat. Any idea? It seems to behave a bit differently from other FP formats.

Christophe.