adding movz to machine description

[Petar Bajic]

----- Original Message ----- 
From: "Ian Lance Taylor" <iant@google.com>
To: "Petar Bajic" <petar.bajic@micronasnit.com>
Cc: <gcc-help@gcc.gnu.org>
Sent: Friday, July 07, 2006 7:39 PM
Subject: Re: adding movz to machine description


> "Petar Bajic" <petar.bajic@micronasnit.com> writes:
>
>> I need to add conditional move instructions without else branch to gcc 
>> dlx port.
>> Any help is appreciated. Im new here.
>
>
> Write it as a define_expand which generates, more or less,
>    (set a c)
>    (set a (if_then_else (eq b 0) d (match_dup a)))
>
> Ian
>


If I write define_expand like this :

(define_expand "movsicc_movz"
  [(set (match_operand:SI 0 "register_operand" "=d,d")
  (if_then_else (eq (match_operand:SI 2 "register_operand" "=d,d") 
(const_int 0))
     (match_operand:SI 1 "register_operand" "=d,d") (match_dup 0)))]
  ""
  "{dlx_emit_cond_move(operands[0], operands[1], operands[2]); DONE;}" )


it never gets used/generated