[PATCH] - Use of powerpc 64bit instructions in 32bit ABI

[Ulrich Weigand]

Fariborz Jahanian wrote:

>Yes. The very early apple's implementation assumed word_mode == DImode
>and emit_group{load/store} just work by
>using PARALLEL for function arguments/return values to register pairs.
>Problem started arising in other parts of
>the compiler;  which uses word_mode==DImode to figure out, for example,
>number of registers used in passing
>structure-by-value; with register size remaining 32-bit.

Could you elaborate what the problem with struct-by-value was?
This appears to work fine for me by returning false from
FUNCTION_ARG_PASS_BY_REFERENCE and then returning a PARALLEL
from FUNCTION_ARG for that struct parameter.



Mit freundlichen Gruessen / Best Regards

Ulrich Weigand

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  Dr. Ulrich Weigand
  Linux for S/390 Design & Development
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