Re: [Rapideuphoria-develop] Architecture ifdefs

[Jeremy C. <je...@co...>]

Sounds fine to me except the x86 variants should probably be X86 and X86_64 
instead of lower case x86*.

Jeremy

-----Original Message----- 
From: Matt Lewis
Sent: Wednesday, August 31, 2011 9:57 AM
To: rap...@li...
Subject: [Rapideuphoria-develop] Architecture ifdefs

I've been thinking about the new architecture ifdefs for 4.1.  It
seems to me that we support 4 different architectures, though there is
a lot of overlap, and my definition of architecture is maybe somewhat
fuzzy, since it includes some OS dependencies.  Here's my view of the
situation:

x86
x86-64 Windows
x86-64 *nix
ARM32

I count x86-64 twice, since there are some differences (mainly in the
size of a long int) between Windows and *nix.  While technically the
same architecture, it may be important to understand which is which
(though through proper memstruct support, hopefully less so).

So perhaps the following ifdefs applied to the obvious situations:

BITS32  (obviously, if we allowed values inside of ifdefs, we could
just have BITS)
BITS64
x86
x86_64
ARM32 (eventually, we'll probably want to support 64-bit ARM)
LONG32
LONG64

I'm not sure if the last two make sense.  Adding these would require
allowing to set them for the translator.  The actual C code we
generate is cross platform, but this would affect which user code is
actually parsed and translated.  So far, I've been doing this sort of
thing at run time, using sizeof( C_POINTER ) to determine if we're
running in 32 or 64 bit mode.

I think all of these (maybe excepting the LONG* ifdefs) are required
as they'd be used for different reasons.  For instance, when
determining the max size of a euphoria integer, I don't care which OS
or even which architecture I'm using.

-- 
Matt Lewis

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