Re: [Qemu-devel] [PATCH 3/9] target-xtensa: specialize softfloat NaN rules

[Max Filippov]

On Sun, Sep 9, 2012 at 4:13 PM, Max Filippov <address@hidden> wrote:
> On Sun, Sep 9, 2012 at 1:31 PM, Peter Maydell <address@hidden> wrote:
>> the Xtensa ISA it says it doesn't have signaling NaNs. Maybe
>> it would be better to have a define for NO_SIGNALING_NANS
>> which made float*_is_signaling_nan() always return false and
>> float*_is_quiet_nan() always return true?

float*_is_quiet_nan should return float*_is_any_nan, but there's no
float16_is_any_nan. I guess it should look like this (any sign, all-ones
exponent part and non-zero mantissa part):

INLINE int float16_is_any_nan(float16 a)
{
    return ((float16_val(a) & ~0x8000) > 0x7c00);
}

Is it correct?

-- 
Thanks.
-- Max