mirror of
https://gitlab.com/freepascal.org/fpc/source.git
synced 2025-10-31 01:51:49 +01:00
101 lines
3.0 KiB
ObjectPascal
101 lines
3.0 KiB
ObjectPascal
{
|
|
Copyright (c) 1998-2002 by Jonas Maebe, member of the Free Pascal
|
|
Development Team
|
|
|
|
This unit implements the ARM optimizer object
|
|
|
|
This program is free software; you can redistribute it and/or modify
|
|
it under the terms of the GNU General Public License as published by
|
|
the Free Software Foundation; either version 2 of the License, or
|
|
(at your option) any later version.
|
|
|
|
This program is distributed in the hope that it will be useful,
|
|
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
GNU General Public License for more details.
|
|
|
|
You should have received a copy of the GNU General Public License
|
|
along with this program; if not, write to the Free Software
|
|
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
|
|
|
|
****************************************************************************
|
|
}
|
|
|
|
|
|
Unit aoptcpu;
|
|
|
|
{$i fpcdefs.inc}
|
|
|
|
Interface
|
|
|
|
uses cpubase, aasmtai, aopt, aoptcpub;
|
|
|
|
Type
|
|
TCpuAsmOptimizer = class(TAsmOptimizer)
|
|
{ uses the same constructor as TAopObj }
|
|
function PeepHoleOptPass1Cpu(var p: tai): boolean; override;
|
|
procedure PeepHoleOptPass2;override;
|
|
End;
|
|
|
|
Implementation
|
|
|
|
uses
|
|
aasmbase,aasmcpu,cgbase;
|
|
|
|
function CanBeCond(p : tai) : boolean;
|
|
begin
|
|
result:=(p.typ=ait_instruction) and (taicpu(p).condition=C_None);
|
|
end;
|
|
|
|
|
|
function TCpuAsmOptimizer.PeepHoleOptPass1Cpu(var p: tai): boolean;
|
|
var
|
|
next1: tai;
|
|
begin
|
|
result := false;
|
|
case p.typ of
|
|
ait_instruction:
|
|
begin
|
|
case taicpu(p).opcode of
|
|
A_MOV:
|
|
begin
|
|
{ fold
|
|
mov reg2,reg0
|
|
mov reg3,reg1
|
|
to
|
|
movw reg2,reg0
|
|
}
|
|
if (taicpu(p).ops=2) and
|
|
(taicpu(p).oper[0]^.typ = top_reg) and
|
|
(taicpu(p).oper[1]^.typ = top_reg) and
|
|
getnextinstruction(p,next1) and
|
|
(next1.typ = ait_instruction) and
|
|
(taicpu(next1).opcode = A_MOV) and
|
|
(taicpu(next1).ops=2) and
|
|
(taicpu(next1).oper[0]^.typ = top_reg) and
|
|
(taicpu(next1).oper[1]^.typ = top_reg) and
|
|
(getsupreg(taicpu(next1).oper[0]^.reg)=getsupreg(taicpu(p).oper[0]^.reg)+1) and
|
|
((getsupreg(taicpu(p).oper[0]^.reg) mod 2)=0) and
|
|
((getsupreg(taicpu(p).oper[1]^.reg) mod 2)=0) and
|
|
(getsupreg(taicpu(next1).oper[1]^.reg)=getsupreg(taicpu(p).oper[1]^.reg)+1) then
|
|
begin
|
|
taicpu(p).opcode:=A_MOVW;
|
|
asml.remove(next1);
|
|
next1.free;
|
|
result := true;
|
|
end;
|
|
end;
|
|
end;
|
|
end;
|
|
end;
|
|
end;
|
|
|
|
|
|
procedure TCpuAsmOptimizer.PeepHoleOptPass2;
|
|
begin
|
|
end;
|
|
|
|
begin
|
|
casmoptimizer:=TCpuAsmOptimizer;
|
|
End.
|