----- Original Message -----
From: "Ian Lance Taylor" <iant@xxxxxxxxxx>
To: "Petar Bajic" <petar.bajic@xxxxxxxxxxxxxxx>
Cc: <gcc-help@xxxxxxxxxxx>
Sent: Thursday, July 13, 2006 9:51 AM
Subject: Re: adding movz to machine description
"Petar Bajic" <petar.bajic@xxxxxxxxxxxxxxx> writes:
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
In order for a define_expand to be used by the machine independent
code, it must have a standard name, as listed here:
http://gcc.gnu.org/onlinedocs/gccint/Standard-Names.html
In this case you should call it simply "movsicc", not "movsicc_movz".
Ian
define_expand is used but instruction is not generated
(define_expand "movsicc"
[(set (match_operand:SI 0 "register_operand" "=d,d")
(if_then_else:SI (eq:SI (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;
}")
In function dlx_emitcond_move I try to emit my instruction "movsicc_movz".
Comment is printed out, but instruction is not generated.
dlx_emit_cond_move (rtx dest, rtx src1, rtx test_rtx)
{
printf("dlx_emit_cond_move called");
emit_insn(gen_movsicc_movz(dest, src1, test_rtx));
return TRUE;
}
and finally instruction is defined like this:
(define_insn "movsicc_movz"
[(set (match_operand:SI 0 "register_operand" "=d,d")
(if_then_else:SI (match_operand:SI 1 "comparison_operator" "")
(match_operand:SI 2 "register_operand" "=d,d")
(match_dup 0)))]
""
"movz\\t%0,%2,%1"
[(set_attr "type" "condmove")
(set_attr "mode" "SI")])
I also have regular patern movsicc_insn wich is always used, and if I skip
it's definition, I can't build compiler (errpor "gen_movsicc_move not
defined")
(define_insn "movsicc_internal"
[(set (match_operand:SI 0 "register_operand" "=j,j")
(if_then_else:SI
(match_operator 1 "comparison_operator" [(match_operand:SI 4
"register_operand" "=k,k") (const_int 0)])
(match_operand:SI 2 "register_operand" "=d,d")
(match_operand:SI 3 "register_operand" "=d,d")))]
""
"movz\\t%0,%2,%4\\n\\tmovn\\t%0,%3,%4"
[(set_attr "type" "condmove")
(set_attr "mode" "SI")])
What do I have to do to make compiler use movsicc_movz when appropriate?
Petar
