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Re: [Help-smalltalk] ZeroDivide bug in float printing

From: Holger Freyther
Subject: Re: [Help-smalltalk] ZeroDivide bug in float printing
Date: Fri, 29 Mar 2019 16:32:28 +0000

> On 29. Mar 2019, at 10:15, Derek Zhou <address@hidden> wrote:
> That's good; however there are poor poeple still stuck with old
> compilers

Is this true for mainstream OS and CPU platforms? Do you have an example?
When I added the builtin (supported by then gcc and now present day clang)
my assumption was sooner than later everyone will be able to use a modern

Even for old CentOS there is support for newer compilers. Do you mind
sharing your specific example?

>> Overflow checking requires lots of thinking. E.g. have you considered
>> where abs(a) < 0? I would prefer if we can exclusively use the compiler
>> primitive.
> compiler primitives are nice; but there should be fallback path that
> also work

I think it depends. Undefined behavior is difficult to grok and it feels
we are walking very close to the edge.

By skimming the code I feel we have to look very carefully at it. Not
because I think it is wrong but because it is not trivial. The cognitive
load for using the builtin is a lot lower.

Let me try to review this in depth.


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