I need an advice about duplication of input arguments in secondary registers

[Kai Tietz]

Hi,

Is there somebody who is able to give me a hint, how to manage it to pass 
register passed arguments in two different registers ? I need this for the 
x86_64 port. The MS ABI passes floating-points in XMM registers, but 
additionally for va-sake within the standard integer registers as shadows. 
Is there in gcc an example, which may can help ?

Regards,
 i.A. Kai Tietz

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  Kai Tietz - Software engineering
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