Also I remember that pascal expects the caller to cleanup to the stack whereas in C the callee cleans up the stack. (perhaps I have this reversed)...
There was also something about whether or not to return values on the stack but I believe that too is covered in the PowerPC ABI. I assume the stack cleanup issues are also addressed (namely by simply using registers instead of the stack)?
Other the years the whole going from Pascal to C on a 68k and then going from 68k to PPC and now to Intel has really 'done a number' on my facilities to find useful information in my brain at a reasonable speed. I doubt that it's solely the Mac's fault ;-)
alex
At 12:23 PM -0900 11/30/05, Mike Kluev wrote:
>On Wed, 30 Nov 2005 10:58:03, Chris Hanson <email@hidden> wrote:
>
>> On Nov 29, 2005, at 2:10 PM, Chris Espinosa wrote:
>>
>>> The 'pascal' keyword actually became a no-op in the transition to
>>> PowerPC more than ten years ago. It specified whether arguments
>>> should be pushed on the calling stack in left-to-right or right-to-
>>> left order. Because PowerPC passes function arguments in
>>> registers, 'pascal' is meaningless in the PowerPC ABI.
>>
>> With enough function arguments ? or the right combination of types of
>> function arguments, if I remember correctly ? PowerPC still requires
>> arguments to be pushed onto the stack. However, the PowerPC ABI
>> declared that all arguments must be pushed in left-to-right order for
>> interop purposes, keeping the "pascal" keyword meaningless.
>
>left-to-right? Is that not a problem for var-arg functions?
>
>Mike
>
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