ppc eabi float arguments

[Bernhard Schommer]

Hi,

if been working with the windriver Diab c compiler for 32bit ppc for  and
encountered an incompatibly with the eabi version of the gcc 4.83. When
calling functions with more than 8 float arguments the gcc stores the 9th
float argument (and so on) as a float where as the diab compiler stores the
argument as a double using 8 byte.

I checked the EABI document and it seems to support the way the diab
compiler passes the arguments:

"Arguments not otherwise handled above [i.e. not passed in registers]
are passed in the parameter words of the caller=E2=80=99s stack frame. [...=
]
float, long long (where implemented), and double arguments are
considered to have 8-byte size and alignment, *with float arguments
converted to double representation*. "

Does anyone know the reason why the gcc passes the argument as single float=
?

Best Regards,
-Bernhard