Re: FSQRT mnemonic missing from PPC-ASM.LISP

On Fri, 10 Jan 2003, Randall Beer wrote:

> I just discovered that the FSQRT mnemonic is missing from the
> DEFPARAMETER for *PPC-OPCODES*  in PPC-ASM.LISP. The net effect of this
> is that one can't assemble any PPC LAP code containing FSQRTs.
>
> Randy Beer
>
>

FSQRT and FSQRTS are both categorized as "optional PPC instructions".
(My guess is that most PPC implementations opt to implement them;
I'm fairly sure that the PPC 601 didn't, but don't know about other
CPUs.)

I agree that assembler should recognize FSQRT/FSQRTS; if there's
really any issue of whether or not these instructions are implemented,
there may need to be some mechanism to select a target architecture.

(You can currently assemble PPC64 instructions, which are definitely
not implemented on 32-bit CPUs.)