On Tue, 13 Jan 2015, Markos Chandras wrote:
> >> What ADDU macro?
> >
> > This:
> >
> > {"addu", "t,r,I", 0, (int) M_ADDU_I, INSN_MACRO, 0, I1, 0, 0 },
> >
> > (from opcodes/mips-opc.c).
>
> I see your point about having 32-bit offsets supported here but it's not
> obvious that addu would simply accept this format without looking at the
> binutils sources.
All MIPS assemblers support it AFAIK, including SGI's MIPSpro and the
original MIPS Co. assembler.
You will have it documented in any reasonable MIPS assembly language
manual, and other books on the MIPS architecture will have it too. All
MIPS ALU operations have a corresponding macro that handles an arbitrary
third argument, including 32-bit immediates, e.g. AND, NOR, SUBU, etc.
Some branches and other operations are macros too.
If you have been unaware of this fact, then I suggest you that you have a
look at a MIPS assembly book, e.g. the book I started with had all the
macros and what they actually expand to listed, in addition to true
hardware instructions up to MIPS IV.
Maciej
