🚀 go-pugleaf

I need some help on addressing modes in gcc 2.2.2.

I have a machine where some instructions can take a constant address,
or a constant plus a register. Some can handle the indirect versions
of those (contents of a fixed location, or contents of a fixed location
plus a register).

How do I tell the compiler that some instructions cannot indirect? I
can say that an operand must be memory, but it won't be able to be
any memory expression. (In other words, GO_IF_LEGITIMATE_ADDRESS needs
to depend on the instruction being generated).

Also, am I correct in thinking that if GO_IF_LEGITIMATE_ADDRESS is
passed an rtx beginning with '(mem (...) )', then it is an indirect
address? (I.e., if it is passed '(reg X)' it is not the register itself
that is being addressed, but the address pointed to by the register)

		Michael
michael@stb.info.com