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{
Copyright (c) 1998-2016 by Florian Klaempfl and Jonas Maebe
This unit contains helper procedures for the assembler peephole optimizer
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 aoptutils;
{$i fpcdefs.inc}
interface
uses
cpubase,aasmtai,aasmcpu;
function MatchOpType(const p : taicpu;type0: toptype) : Boolean;
function MatchOpType(const p : taicpu;type0,type1 : toptype) : Boolean;
{$if max_operands>2}
function MatchOpType(const p : taicpu; type0,type1,type2 : toptype) : Boolean;
{$endif max_operands>2}
{ skips all labels and returns the next "real" instruction }
function SkipLabels(hp: tai; out hp2: tai): boolean;
{ sets hp2 to hp and returns True if hp is not nil }
function SetAndTest(const hp: tai; out hp2: tai): Boolean;
implementation
uses
aasmbase;
function MatchOpType(const p : taicpu; type0: toptype) : Boolean; inline;
begin
Result:=(p.ops=1) and (p.oper[0]^.typ=type0);
end;
function MatchOpType(const p : taicpu; type0,type1 : toptype) : Boolean; inline;
begin
Result:=(p.ops=2) and (p.oper[0]^.typ=type0) and (p.oper[1]^.typ=type1);
end;
{$if max_operands>2}
function MatchOpType(const p : taicpu; type0,type1,type2 : toptype) : Boolean; inline;
begin
Result:=(p.ops=3) and (p.oper[0]^.typ=type0) and (p.oper[1]^.typ=type1) and (p.oper[2]^.typ=type2);
end;
{$endif max_operands>2}
{ skips all labels and returns the next "real" instruction }
function SkipLabels(hp: tai; out hp2: tai): boolean;
begin
while assigned(hp.next) and
(tai(hp.next).typ in SkipInstr + [ait_label,ait_align]) Do
hp := tai(hp.next);
if assigned(hp.next) then
begin
SkipLabels := True;
hp2 := tai(hp.next)
end
else
begin
hp2 := hp;
SkipLabels := False
end;
end;
{ sets hp2 to hp and returns True if hp is not nil }
function SetAndTest(const hp: tai; out hp2: tai): Boolean; inline;
begin
hp2 := hp;
Result := Assigned(hp);
end;
end.
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