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Nat.mult/square_nat returns different results at different stack depths #4083

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vicuna opened this issue Aug 13, 2006 · 2 comments
Closed

Nat.mult/square_nat returns different results at different stack depths #4083

vicuna opened this issue Aug 13, 2006 · 2 comments
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@vicuna
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vicuna commented Aug 13, 2006

Original bug ID: 4083
Reporter: mgiovann
Status: closed (set by @xavierleroy on 2006-08-19T07:46:37Z)
Resolution: not a bug
Priority: normal
Severity: minor
Version: 3.09.2
Category: ~DO NOT USE (was: OCaml general)

Bug description

It seems that Nat.mult_nat and Nat.square_nat fills the higher digits of the product with garbage, but depending on the nesting depth of the calling function.

Additional information

I attach a simple test case I verified on Mac OS X 10.4.7 (running on a PPC 750), and on Windows XP (running on a Celeron).

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vicuna commented Aug 14, 2006

Comment author: mgiovann

Please disregard. I apologize for the waste of time I might have caused, but looking at the attached code "sideways and squinting a little", I noticed a bug in it that has nothing to do with Nat.

@vicuna
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vicuna commented Aug 19, 2006

Comment author: @xavierleroy

For the record: when calling Nat.square_nat d ld od x lx ox, we must have
ld >= 2 * lx. This wasn't the case in the submitted code.

@vicuna vicuna closed this as completed Aug 19, 2006
@vicuna vicuna added the bug label Mar 19, 2019
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