Re: [Qemu-devel] [PATCH v2] softfloat: add float128_is_{normal, denormal}

[Richard Henderson <richard.henderson@linaro.org>]

On 2/6/19 9:10 AM, David Hildenbrand wrote:
> Needed on s390x, to test for the data class of a number. So it will
> gain soon a user.
> 
> A number is considered normal if the exponent is neither 0 nor all 1's.
> That can be checked by adding 1 to the exponent, and comparing against
>> = 2 after dropping an eventual overflow into the sign bit.
> While at it, convert the other floatXX_is_normal functions to use a
> similar, less error prone calculation, as suggested by Richard H.
> 
> Signed-off-by: David Hildenbrand <david@redhat.com>
> ---
>  include/fpu/softfloat.h | 14 ++++++++++++--
>  1 file changed, 12 insertions(+), 2 deletions(-)


Reviewed-by: Richard Henderson <richard.henderson@linaro.org>


r~