> Hello,
> 
> This patch rewrites ppc_svr4_push_dummy_call so that it implements the two-pass push-arguments algorithm using a "for" loop.
> 
> The simplification identified and fixed the bugs:
> 
> - Altivec registers on the stack weren't being 16 byte aligned
> - Floats weren't being converted to doubles before being stored in register/memory ("gdb.base/callfuncs.exp: p t_float_values2" now passes).
> 
> Ok?
> 
> Andrew
> 
> PS: I intend moving align_{up,down} to utils.c but that is separate.

Oops, try this.  It's got the up-to-date changelog and uses a more 
readable context diff.

Andrew