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Re: Sending floats using objc_msgSendv


On Aug 11, 2005, at 9:50 AM, Sherm Pendley wrote:

On Aug 11, 2005, at 8:49 AM, Patrick Beard wrote:


As Greg said, go read objc-msg-ppc.s to understand why.


One thing I don't understand is why the marg_* macros don't automatically do the right thing with float arguments. Isn't the point of having those macros to insulate the programmer from having to deal with that sort of detail?

The simple answer is that these macros are a little too simplistic to easiy encapsulate the calling conventions of the PowerPC. I've written code that builds parameter register maps in the past, and you need to keep track of the types of the parameters that have been pushed so far.

- Patrick

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References: 
 >Sending floats using objc_msgSendv (From: Nathaniel Gray <email@hidden>)
 >Re: Sending floats using objc_msgSendv (From: Greg Parker <email@hidden>)
 >Re: Sending floats using objc_msgSendv (From: Sherm Pendley <email@hidden>)
 >Re: Sending floats using objc_msgSendv (From: Nathaniel Gray <email@hidden>)
 >Re: Sending floats using objc_msgSendv (From: Sherm Pendley <email@hidden>)



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