Hi,
Thanks for answer but Im not able to make it work; I dont know how to extract
the specific slot-usage (out of a number of an alternatives) out of the RTL
insn description.
Is there some get_attr_ for this?
--- On Wed, 12/3/08, Bingfeng Mei <[EMAIL PROTECTED]> wrote:
> From: Bingfeng Mei <[EMAIL PROTECTED]>
> Subject: RE: generate assembly mnemonic depending the resource allocation
> To: "[EMAIL PROTECTED]" <[EMAIL PROTECTED]>, "gcc@gcc.gnu.org"
> <gcc@gcc.gnu.org>
> Date: Wednesday, December 3, 2008, 3:00 PM
> You can use C statements to return a modified template
> string such like
> (define_insn "addsi3"
> [(set (match_operand:SI 0
> "general_register_operand" "=d")
> (plus:SI (match_operand:SI 1
> "general_register_operand" "d")
> (match_operand:SI 2
> "general_register_operand" "d")))]
> ""
> {
> switch (slot-used){
> case 0:
> return "add-slot0, %0, %1, %2";
> case 1:
> return "add-slot1, %0, %1, %2";
> case 2:
> return "add-slot1, %0, %1, %2";
> }
> }
> [(set_attr "type" "alu")
> (set_attr "mode" "SI")
> (set_attr "length" "1")])
>
> > -----Original Message-----
> > From: [EMAIL PROTECTED]
> [mailto:[EMAIL PROTECTED] On
> > Behalf Of Alex Turjan
> > Sent: 03 December 2008 10:34
> > To: gcc@gcc.gnu.org
> > Subject: generate assembly mnemonic depending the
> resource allocation
> >
> > Hi all,
> > Im building a gcc target for a vliw machine that can
> execute
> > the same instruction on different resources (slots)
> and
> > depending on which resources are allocate the
> instruction
> > must have a different mnemonic. Is it possible in gcc
> to have
> > for the same define_insn constraints (depending on the
>
> > allocated architecture resources) different assembly
> instructions?
> >
> > Here is an example:
> > Consider the following addSI RTL pattern:
> > (define_insn "addsi3"
> > [(set (match_operand:SI 0
> "general_register_operand" "=d")
> > (plus:SI (match_operand:SI 1
> "general_register_operand" "d")
> > (match_operand:SI 2
> > "general_register_operand" "d")))]
> > ""
> > "add %0,%1,%2%"
> > [(set_attr "type" "alu")
> > (set_attr "mode" "SI")
> > (set_attr "length" "1")])
> >
> > On my target machine "alu" is a reservation
> that occupies one
> > of the following 3 slots:
> "slot1|slot2|slot3" and, I need to
> > generate assembly code with different mnemonic
> depending on
> > which slot the instruction was scheduled:
> >
> > add-slot1 %0,%1,%2% // if scheduled on slot 1
> > add-slot2 %0,%1,%2% // if scheduled on slot 2
> > add-slot3 %0,%1,%2% // if scheduled on slot 3
> >
> > Alex
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
