On 2/12/19 3:03 AM, David Hildenbrand wrote:
> PoP describes "Round to nearest with ties away from 0" as
> "The candidate nearest to the input value is selected. In case of a tie,
> the candidate selected is the one that is larger in magnitude."
>
> While float_round_ties_away is according to the introducing commit
> f9288a76f181 ("softfloat: Add support for ties-away rounding")
> "roundTiesToAway: the floating-point number nearest to the infinitely
> precise result shall be delivered; if the two nearest floating-point
> numbers bracketing an unrepresentable infinitely precise result are
> equally near, the one with larger magnitude shall be delivered."
>
> So this could be it if we're lucky ;)
Yep, that's right.
>
> Handle "round to prepare for shorter precision" just as when setting it
> via SET FLOATING POINT and friends.
>
> As all instructions properly check for valid rounding modes in translate.c
> we can add an assert. Fix one missing empty line.
>
> Cc: Peter Maydell <[email protected]>
> Signed-off-by: David Hildenbrand <[email protected]>
> ---
Reviewed-by: Richard Henderson <[email protected]>
r~
