Re: [Qemu-devel] [PATCH v3 19/22] fpu/softfloat: re-factor scalbn

[Richard Henderson]

On 01/24/2018 05:13 AM, Alex Bennée wrote:
> +/* Multiply A by 2 raised to the power N.  */
> +static FloatParts scalbn_decomposed(FloatParts a, int n,
> +                                          float_status *s)
> +{
> +    if (a.cls == float_class_normal) {
> +        a.exp += n;
> +    }
> +    return a;
> +}

...

> -    if ( aExp == 0x7FF ) {
> -        if ( aSig ) {
> -            return propagateFloat64NaN(a, a, status);

This is where we used to raise inexact.
In the new function we need to handle this as in round_to_int.


r~