Re: [Qemu-devel] [PATCH 3/7] target/m68k: add fsglmul and fsgldiv

[Richard Henderson]

On 06/26/2017 01:05 AM, Laurent Vivier wrote:
> > floatx80_div()?
>
> Just to follow the spec of the instruction:
>
> "if either operand requires more than 24 bits of mantissa to be
> accurately represented, the extraneous mantissa bits are truncated prior
> to the multiplication;"
>
> Do you think I should keep them in floatx80 and use the floatx80_round()
> (I introduce latter in the series) to reduce the precision prior the
> floatx80_mul()?

Actually, yes.  The spec explicitly says that the exponent will be in extended 
precision.


r~