Richard Henderson writes:
> Without bounding the increment, we can overflow exp either here
> in scalbn_decomposed or when adding the bias in round_canonical.
> This can result in e.g. underflowing to 0 instead of overflowing
> to infinity.
>
> The old softfloat code did bound the increment.
>
>
On 17 April 2018 at 14:51, Alex Bennée wrote:
>
> Richard Henderson writes:
>
>> Without bounding the increment, we can overflow exp either here
>> in scalbn_decomposed or when adding the bias in round_canonical.
>> This can result in e.g. underflowing to 0 instead of overflowing
>> to infinity.
On 17 April 2018 at 03:53, Richard Henderson
wrote:
> Without bounding the increment, we can overflow exp either here
> in scalbn_decomposed or when adding the bias in round_canonical.
> This can result in e.g. underflowing to 0 instead of overflowing
> to infinity.
>
> The old softfloat code did
Without bounding the increment, we can overflow exp either here
in scalbn_decomposed or when adding the bias in round_canonical.
This can result in e.g. underflowing to 0 instead of overflowing
to infinity.
The old softfloat code did bound the increment.
Signed-off-by: Richard Henderson
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fpu
