[m68k] Add ffssi2 pattern for MCF528x

[Bernardo Innocenti]

On Thursday 14 August 2003 02:21, Richard Henderson wrote:
> On Wed, Aug 13, 2003 at 02:10:52AM +0200, Bernardo Innocenti wrote:
> > This patch must be applied _after_ the previous two ColdFire
> > patches (both were approved but not yet committed to CVS).
>
> Have you applied for cvs write access?

Not yet. May I put you as my sponsor in the request form, please?


> > 	* config/m68k/m68kmd: Add ffssi2 pattern for 528x
>
> Well, I guess.  But really you want to add ctz patterns.  I suggest
>
> (define_insn "*ff1"
>   [(set (match_operand:SI 0 "register_operand" "=d")
>         (ctz:SI (not:SI (match_operand:SI 1 "register_operand" "0"))))]
>   ""
>   "ff1%.l %0")
>
> (define_expand "ctxsi2"
>   [(set (match_dup 2)
> 	(not:SI (match_operand:SI 1 "register_operand" "")))
>    (set (match_operand:SI 0 "register_operand" "=d")
>         (ctz:SI (not:SI (match_dup 2))))]
>   ""
> {
>   operands[2] = gen_reg_rtx (SImode);
> })
>
> Then add a ffssi2 expander that uses these patterns.

Unfortunately, I can't test on a 528x. Peter, what do you think?

-- 
  // Bernardo Innocenti - Develer S.r.l., R&D dept.
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