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Re: [mips patch rfa] slight tweak to vr5400 "mul" opcode
On Fri, 2003-04-04 at 16:45, cgd at broadcom dot com wrote:
> At Sat, 5 Apr 2003 00:11:30 +0000 (UTC), "Eric Christopher" wrote:
> > > any reason the following patch shouldn't be applied?
> >
> > Yup. For the 5432 only 3 operand is correct. Don't ask me, I didn't
> > write the spec.
>
> Err, really?
>
> I ask because, upon seeing your msg, i just found and downloaded a
> 5432 spec (i'd previously been looking at a 5464 spec 8-) from:
>
> http://www.necelam.com/docs/files/1375_V2.pdf
>
> On page 484, where it describes the MUL instruction, it gives no such
> restriction...
Right. I correlated that with the 5500 documentation that states that
the mul instruction "has 5432 compatibility as well as two-operand..."
or something of the sort.
-eric