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Re: [perl #18127] [PATCH] Implicit stack direction probe

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Dan Sugalski
October 29, 2002 08:27
Re: [perl #18127] [PATCH] Implicit stack direction probe
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At 4:57 PM +0100 10/29/02, Leopold Toetsch wrote:
>Dan Sugalski wrote:
>>At 3:27 PM +0100 10/29/02, Leopold Toetsch wrote:
>>... Can we really
>>>have e.g. odd aligned PMCs on stack? I don't think so. Or am I 
>>>still missing something?
>>There was some indication back when this was first implemented that 
>>the i386, at least when running windows, could have odd-aligned 
>>pointers in stack-allocated data. Nobody was 100% sure, but better 
>>safe than not, at least until someone can say definitively that 
>>we're being too cautious.
>Then lets first test my patch(es) (in a different followup) on all 
>plattforms. If i386/Win really fails, we make some #ifdef.
>life.pasm gens 270 => 403 is an argument ;-)

Oh, absolutely. Correctness, though, is more important that speed. 
(Barely, but still more important :) I'm always loathe to count on 
empirical research on computers--the specs are available *somewhere*, 
and we should see about digging them up and getting a final answer 
one way or another.

--------------------------------------"it's like this"-------------------
Dan Sugalski                          even samurai                         have teddy bears and even
                                       teddy bears get drunk

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