Hi all,
I'm looking at the description of LIBCALL_VALUE (and its cousin
FUNCTION_VALUE) in the GCC Internals manual, and I'm also looking at all
the different machine.h files in gcc. None of these seem to address a
question I have.
Suppose my processor has only four 8-bit registers, A through D.
I can have LIBCALL_VALUE/FUNCTION_VALUE return register A for QImode,
HImode, and SImode, since I have 32 bits of registers available.
However, what should I return for DImode? I need 64 bits, but I don't
have enough registers.
I suspect that this is where BLKmode would come in, but I am not sure
how to use that. What happens if FUNCTION_VALUE is called with DImode?
What should I return?
Thanks for any help!
--Rob
