[fpc-devel] Fwd: [Lazarusdev] Moving issue 39853 to FPC project

[J. Gareth Moreton]

Ah, sorry, that was for #39834 - wrong issue!  Disregard.

Gareth aka. Kit

On 18/08/2022 07:28, J. Gareth Moreton via fpc-devel wrote:
>
> Thanks Ondrej.
>
> In the meantime, I've found the problem and am testing a fix. 
> Basically the function that computes the magic number for a given bit 
> size doesn't sign-extend it to the full size.  In the given example, 
> the signed divisior +60 for 32-bit produces the multiplicand 
> $88888889.  However, under x86_64, it is not sign-extended to the full 
> 64-bit internal type... that is, the variable holds $00000000 88888889 
> instead of $FFFFFFFF 88888889.  This causes a later condition that 
> checks if the value is less than 0 to malfunction.
>
> Gareth aka. Kit
>
> On 18/08/2022 07:06, Ondrej Pokorny via fpc-devel wrote:
>>
>> Hello it looks like only people with FPC developer status can move 
>> issues to the FPC project. Therefore I forward the request to fpc-devel.
>>
>> Ondrej
>>
>>
>> -------- Weitergeleitete Nachricht --------
>> Betreff: 	[Lazarusdev] Moving issue 39853 to FPC project
>> Datum: 	Thu, 18 Aug 2022 03:51:33 +0300
>> Kopie (CC): 	Maxim Ganetsky <ganmax at narod.ru>
>>
>>
>>
>> Hello.
>>
>> Could someone move this issue to FPC project please:
>> https://gitlab.com/freepascal.org/lazarus/lazarus/-/issues/39853
>>
>> -- 
>> Best regards,
>>   Maxim Ganetskymailto:ganmax at narod.ru
>>
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>
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