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https://gitlab.com/freepascal.org/fpc/source.git
synced 2025-04-28 06:23:48 +02:00
711 lines
23 KiB
ObjectPascal
711 lines
23 KiB
ObjectPascal
{
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$Id$
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Copyright (c) 2000-2002 by Florian Klaempfl
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Type checking and register allocation for math nodes
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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****************************************************************************
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}
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unit nmat;
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{$i fpcdefs.inc}
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interface
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uses
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node;
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type
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tmoddivnode = class(tbinopnode)
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function pass_1 : tnode;override;
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function det_resulttype:tnode;override;
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protected
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{ override the following if you want to implement }
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{ parts explicitely in the code generator (JM) }
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function first_moddiv64bitint: tnode; virtual;
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function firstoptimize: tnode; virtual;
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end;
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tmoddivnodeclass = class of tmoddivnode;
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tshlshrnode = class(tbinopnode)
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function pass_1 : tnode;override;
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function det_resulttype:tnode;override;
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end;
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tshlshrnodeclass = class of tshlshrnode;
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tunaryminusnode = class(tunarynode)
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constructor create(expr : tnode);virtual;
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function pass_1 : tnode;override;
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function det_resulttype:tnode;override;
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end;
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tunaryminusnodeclass = class of tunaryminusnode;
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tnotnode = class(tunarynode)
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constructor create(expr : tnode);virtual;
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function pass_1 : tnode;override;
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function det_resulttype:tnode;override;
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end;
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tnotnodeclass = class of tnotnode;
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var
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cmoddivnode : tmoddivnodeclass;
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cshlshrnode : tshlshrnodeclass;
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cunaryminusnode : tunaryminusnodeclass;
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cnotnode : tnotnodeclass;
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implementation
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uses
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systems,tokens,
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verbose,globals,cutils,
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globtype,
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symconst,symtype,symtable,symdef,types,
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htypechk,pass_1,cpubase,
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cgbase,
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ncon,ncnv,ncal,nadd;
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{****************************************************************************
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TMODDIVNODE
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****************************************************************************}
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function tmoddivnode.det_resulttype:tnode;
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var
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t : tnode;
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rd,ld : tdef;
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rv,lv : tconstexprint;
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begin
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result:=nil;
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resulttypepass(left);
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resulttypepass(right);
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set_varstate(left,true);
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set_varstate(right,true);
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if codegenerror then
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exit;
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{ constant folding }
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if is_constintnode(left) and is_constintnode(right) then
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begin
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rv:=tordconstnode(right).value;
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lv:=tordconstnode(left).value;
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{ check for division by zero }
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if (rv=0) then
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begin
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Message(parser_e_division_by_zero);
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{ recover }
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rv:=1;
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end;
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case nodetype of
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modn:
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t:=genintconstnode(lv mod rv);
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divn:
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t:=genintconstnode(lv div rv);
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end;
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result:=t;
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exit;
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end;
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{ allow operator overloading }
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t:=self;
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if isbinaryoverloaded(t) then
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begin
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result:=t;
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exit;
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end;
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{ if one operand is a cardinal and the other is a positive constant, convert the }
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{ constant to a cardinal as well so we don't have to do a 64bit division (JM) }
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{ Do the same for qwords and positive constants as well, otherwise things like }
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{ "qword mod 10" are evaluated with int64 as result, which is wrong if the }
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{ "qword" was > high(int64) (JM) }
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if (left.resulttype.def.deftype=orddef) and (right.resulttype.def.deftype=orddef) then
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if (torddef(right.resulttype.def).typ in [u32bit,u64bit]) and
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is_constintnode(left) and
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(tordconstnode(left).value >= 0) then
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inserttypeconv(left,right.resulttype)
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else if (torddef(left.resulttype.def).typ in [u32bit,u64bit]) and
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is_constintnode(right) and
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(tordconstnode(right).value >= 0) then
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inserttypeconv(right,left.resulttype);
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if (left.resulttype.def.deftype=orddef) and (right.resulttype.def.deftype=orddef) and
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(is_64bitint(left.resulttype.def) or is_64bitint(right.resulttype.def) or
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{ when mixing cardinals and signed numbers, convert everythign to 64bit (JM) }
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((torddef(right.resulttype.def).typ = u32bit) and
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is_signed(left.resulttype.def)) or
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((torddef(left.resulttype.def).typ = u32bit) and
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is_signed(right.resulttype.def))) then
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begin
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rd:=right.resulttype.def;
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ld:=left.resulttype.def;
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{ issue warning if necessary }
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if not (is_64bitint(left.resulttype.def) or is_64bitint(right.resulttype.def)) then
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CGMessage(type_w_mixed_signed_unsigned);
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if is_signed(rd) or is_signed(ld) then
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begin
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if (torddef(ld).typ<>s64bit) then
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inserttypeconv(left,cs64bittype);
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if (torddef(rd).typ<>s64bit) then
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inserttypeconv(right,cs64bittype);
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end
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else
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begin
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if (torddef(ld).typ<>u64bit) then
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inserttypeconv(left,cu64bittype);
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if (torddef(rd).typ<>u64bit) then
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inserttypeconv(right,cu64bittype);
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end;
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resulttype:=left.resulttype;
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end
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else
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begin
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if not(right.resulttype.def.deftype=orddef) or
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not(torddef(right.resulttype.def).typ in [s32bit,u32bit]) then
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inserttypeconv(right,s32bittype);
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if not(left.resulttype.def.deftype=orddef) or
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not(torddef(left.resulttype.def).typ in [s32bit,u32bit]) then
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inserttypeconv(left,s32bittype);
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{ the resulttype.def depends on the right side, because the left becomes }
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{ always 64 bit }
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resulttype:=right.resulttype;
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end;
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end;
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function tmoddivnode.first_moddiv64bitint: tnode;
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var
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procname: string[31];
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begin
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result := nil;
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{ otherwise create a call to a helper }
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if nodetype = divn then
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procname := 'fpc_div_'
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else
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procname := 'fpc_mod_';
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if is_signed(resulttype.def) then
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procname := procname + 'int64'
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else
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procname := procname + 'qword';
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result := ccallnode.createintern(procname,ccallparanode.create(left,
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ccallparanode.create(right,nil)));
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left := nil;
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right := nil;
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firstpass(result);
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end;
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function tmoddivnode.firstoptimize: tnode;
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var
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power{,shiftval} : longint;
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newtype: tnodetype;
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begin
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result := nil;
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{ divide/mod a number by a constant which is a power of 2? }
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if (cs_optimize in aktglobalswitches) and
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(right.nodetype = ordconstn) and
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{ ((nodetype = divn) or
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not is_signed(resulttype.def)) and}
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(not is_signed(resulttype.def)) and
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ispowerof2(tordconstnode(right).value,power) then
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begin
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if nodetype = divn then
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begin
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(*
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if is_signed(resulttype.def) then
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begin
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if is_64bitint(left.resulttype.def) then
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if not (cs_littlesize in aktglobalswitches) then
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shiftval := 63
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else
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{ the shift code is a lot bigger than the call to }
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{ the divide helper }
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exit
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else
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shiftval := 31;
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{ we reuse left twice, so create once a copy of it }
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{ !!! if left is a call is -> call gets executed twice }
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left := caddnode.create(addn,left,
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caddnode.create(andn,
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cshlshrnode.create(sarn,left.getcopy,
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cordconstnode.create(shiftval,s32bittype)),
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cordconstnode.create(tordconstnode(right).value-1,
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right.resulttype)));
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newtype := sarn;
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end
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else
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*)
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newtype := shrn;
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tordconstnode(right).value := power;
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result := cshlshrnode.create(newtype,left,right)
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end
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else
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begin
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dec(tordconstnode(right).value);
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result := caddnode.create(andn,left,right);
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end;
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{ left and right are reused }
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left := nil;
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right := nil;
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firstpass(result);
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exit;
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end;
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end;
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function tmoddivnode.pass_1 : tnode;
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begin
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result:=nil;
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firstpass(left);
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firstpass(right);
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if codegenerror then
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exit;
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result := firstoptimize;
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if assigned(result) then
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exit;
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{ 64bit }
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if (left.resulttype.def.deftype=orddef) and (right.resulttype.def.deftype=orddef) and
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(is_64bitint(left.resulttype.def) or is_64bitint(right.resulttype.def)) then
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begin
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result := first_moddiv64bitint;
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if assigned(result) then
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exit;
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location.loc:=LOC_REGISTER;
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calcregisters(self,2,0,0);
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end
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else
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begin
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left_right_max;
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if left.registers32<=right.registers32 then
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inc(registers32);
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end;
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location.loc:=LOC_REGISTER;
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end;
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{****************************************************************************
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TSHLSHRNODE
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****************************************************************************}
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function tshlshrnode.det_resulttype:tnode;
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var
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t : tnode;
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begin
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result:=nil;
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resulttypepass(left);
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resulttypepass(right);
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set_varstate(right,true);
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set_varstate(left,true);
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if codegenerror then
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exit;
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{ constant folding }
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if is_constintnode(left) and is_constintnode(right) then
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begin
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case nodetype of
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shrn:
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t:=genintconstnode(tordconstnode(left).value shr tordconstnode(right).value);
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shln:
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t:=genintconstnode(tordconstnode(left).value shl tordconstnode(right).value);
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end;
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result:=t;
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exit;
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end;
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{ allow operator overloading }
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t:=self;
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if isbinaryoverloaded(t) then
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begin
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result:=t;
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exit;
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end;
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{ 64 bit ints have their own shift handling }
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if not(is_64bitint(left.resulttype.def)) then
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begin
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if torddef(left.resulttype.def).typ <> u32bit then
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inserttypeconv(left,s32bittype);
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end;
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inserttypeconv(right,s32bittype);
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resulttype:=left.resulttype;
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end;
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function tshlshrnode.pass_1 : tnode;
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var
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regs : longint;
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begin
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result:=nil;
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firstpass(left);
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firstpass(right);
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if codegenerror then
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exit;
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{ 64 bit ints have their own shift handling }
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if not(is_64bitint(left.resulttype.def)) then
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regs:=1
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else
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regs:=2;
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if (right.nodetype<>ordconstn) then
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inc(regs);
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location.loc:=LOC_REGISTER;
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calcregisters(self,regs,0,0);
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end;
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{****************************************************************************
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TUNARYMINUSNODE
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****************************************************************************}
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constructor tunaryminusnode.create(expr : tnode);
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begin
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inherited create(unaryminusn,expr);
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end;
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function tunaryminusnode.det_resulttype : tnode;
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var
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t : tnode;
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minusdef : pprocdeflist;
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begin
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result:=nil;
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resulttypepass(left);
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set_varstate(left,true);
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if codegenerror then
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exit;
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{ constant folding }
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if is_constintnode(left) then
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begin
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tordconstnode(left).value:=-tordconstnode(left).value;
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result:=left;
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left:=nil;
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exit;
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end;
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if is_constrealnode(left) then
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begin
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trealconstnode(left).value_real:=-trealconstnode(left).value_real;
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result:=left;
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left:=nil;
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exit;
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end;
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resulttype:=left.resulttype;
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if (left.resulttype.def.deftype=floatdef) then
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begin
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end
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{$ifdef SUPPORT_MMX}
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else if (cs_mmx in aktlocalswitches) and
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is_mmx_able_array(left.resulttype.def) then
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begin
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{ if saturation is on, left.resulttype.def isn't
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"mmx able" (FK)
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if (cs_mmx_saturation in aktlocalswitches^) and
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(torddef(tarraydef(resulttype.def).definition).typ in
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[s32bit,u32bit]) then
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CGMessage(type_e_mismatch);
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}
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end
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{$endif SUPPORT_MMX}
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else if is_64bitint(left.resulttype.def) then
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begin
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end
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else if (left.resulttype.def.deftype=orddef) then
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begin
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inserttypeconv(left,s32bittype);
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resulttype:=left.resulttype;
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end
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else
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begin
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if assigned(overloaded_operators[_minus]) then
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minusdef:=overloaded_operators[_minus].defs
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else
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minusdef:=nil;
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while assigned(minusdef) do
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begin
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if is_equal(tparaitem(minusdef^.def.para.first).paratype.def,left.resulttype.def) and
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(tparaitem(minusdef^.def.para.first).next=nil) then
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begin
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t:=ccallnode.create(ccallparanode.create(left,nil),
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overloaded_operators[_minus],nil,nil);
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left:=nil;
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result:=t;
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exit;
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end;
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minusdef:=minusdef^.next;
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end;
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CGMessage(type_e_mismatch);
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end;
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end;
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{ generic code }
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{ overridden by: }
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{ i386 }
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function tunaryminusnode.pass_1 : tnode;
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begin
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result:=nil;
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firstpass(left);
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if codegenerror then
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exit;
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registers32:=left.registers32;
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registersfpu:=left.registersfpu;
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{$ifdef SUPPORT_MMX}
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registersmmx:=left.registersmmx;
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{$endif SUPPORT_MMX}
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if (left.resulttype.def.deftype=floatdef) then
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begin
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if (left.location.loc<>LOC_REGISTER) and
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(registersfpu<1) then
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registersfpu:=1;
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location.loc:=LOC_REGISTER;
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end
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{$ifdef SUPPORT_MMX}
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else if (cs_mmx in aktlocalswitches) and
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is_mmx_able_array(left.resulttype.def) then
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begin
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if (left.location.loc<>LOC_MMXREGISTER) and
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(registersmmx<1) then
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registersmmx:=1;
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end
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{$endif SUPPORT_MMX}
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else if is_64bitint(left.resulttype.def) then
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begin
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if (left.location.loc<>LOC_REGISTER) and
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(registers32<2) then
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registers32:=2;
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location.loc:=LOC_REGISTER;
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end
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else if (left.resulttype.def.deftype=orddef) then
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begin
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if (left.location.loc<>LOC_REGISTER) and
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(registers32<1) then
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registers32:=1;
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location.loc:=LOC_REGISTER;
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end;
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end;
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{****************************************************************************
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TNOTNODE
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****************************************************************************}
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constructor tnotnode.create(expr : tnode);
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begin
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inherited create(notn,expr);
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end;
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function tnotnode.det_resulttype : tnode;
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var
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t : tnode;
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notdef : pprocdeflist;
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v : tconstexprint;
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begin
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result:=nil;
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resulttypepass(left);
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set_varstate(left,true);
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if codegenerror then
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exit;
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{ constant folding }
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if (left.nodetype=ordconstn) then
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begin
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v:=tordconstnode(left).value;
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case torddef(left.resulttype.def).typ of
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bool8bit,
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bool16bit,
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bool32bit :
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begin
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{ here we do a boolean(byte(..)) type cast because }
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{ boolean(<int64>) is buggy in 1.00 }
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v:=byte(not(boolean(byte(v))));
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end;
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uchar,
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u8bit :
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v:=byte(not byte(v));
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s8bit :
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v:=shortint(not shortint(v));
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uwidechar,
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u16bit :
|
|
v:=word(not word(v));
|
|
s16bit :
|
|
v:=smallint(not smallint(v));
|
|
u32bit :
|
|
v:=cardinal(not cardinal(v));
|
|
s32bit :
|
|
v:=longint(not longint(v));
|
|
u64bit :
|
|
v:=int64(not int64(v)); { maybe qword is required }
|
|
s64bit :
|
|
v:=int64(not int64(v));
|
|
else
|
|
CGMessage(type_e_mismatch);
|
|
end;
|
|
t:=cordconstnode.create(v,left.resulttype);
|
|
result:=t;
|
|
exit;
|
|
end;
|
|
|
|
resulttype:=left.resulttype;
|
|
if is_boolean(resulttype.def) then
|
|
begin
|
|
end
|
|
else
|
|
{$ifdef SUPPORT_MMX}
|
|
if (cs_mmx in aktlocalswitches) and
|
|
is_mmx_able_array(left.resulttype.def) then
|
|
begin
|
|
end
|
|
else
|
|
{$endif SUPPORT_MMX}
|
|
if is_64bitint(left.resulttype.def) then
|
|
begin
|
|
end
|
|
else if is_integer(left.resulttype.def) then
|
|
begin
|
|
end
|
|
else
|
|
begin
|
|
if assigned(overloaded_operators[_op_not]) then
|
|
notdef:=overloaded_operators[_op_not].defs
|
|
else
|
|
notdef:=nil;
|
|
while assigned(notdef) do
|
|
begin
|
|
if is_equal(tparaitem(notdef^.def.para.first).paratype.def,left.resulttype.def) and
|
|
(tparaitem(notdef^.def.para.first).next=nil) then
|
|
begin
|
|
t:=ccallnode.create(ccallparanode.create(left,nil),
|
|
overloaded_operators[_op_not],nil,nil);
|
|
left:=nil;
|
|
result:=t;
|
|
exit;
|
|
end;
|
|
notdef:=notdef^.next;
|
|
end;
|
|
CGMessage(type_e_mismatch);
|
|
end;
|
|
end;
|
|
|
|
|
|
function tnotnode.pass_1 : tnode;
|
|
begin
|
|
result:=nil;
|
|
firstpass(left);
|
|
if codegenerror then
|
|
exit;
|
|
|
|
location.loc:=left.location.loc;
|
|
registers32:=left.registers32;
|
|
{$ifdef SUPPORT_MMX}
|
|
registersmmx:=left.registersmmx;
|
|
{$endif SUPPORT_MMX}
|
|
if is_boolean(resulttype.def) then
|
|
begin
|
|
if (location.loc in [LOC_REFERENCE,LOC_CREFERENCE,LOC_CREGISTER]) then
|
|
begin
|
|
location.loc:=LOC_REGISTER;
|
|
if (registers32<1) then
|
|
registers32:=1;
|
|
end;
|
|
{ before loading it into flags we need to load it into
|
|
a register thus 1 register is need PM }
|
|
{$ifdef i386}
|
|
if left.location.loc<>LOC_JUMP then
|
|
location.loc:=LOC_FLAGS;
|
|
{$endif def i386}
|
|
end
|
|
else
|
|
{$ifdef SUPPORT_MMX}
|
|
if (cs_mmx in aktlocalswitches) and
|
|
is_mmx_able_array(left.resulttype.def) then
|
|
begin
|
|
if (left.location.loc<>LOC_MMXREGISTER) and
|
|
(registersmmx<1) then
|
|
registersmmx:=1;
|
|
end
|
|
else
|
|
{$endif SUPPORT_MMX}
|
|
if is_64bitint(left.resulttype.def) then
|
|
begin
|
|
if (location.loc in [LOC_REFERENCE,LOC_CREFERENCE,LOC_CREGISTER]) then
|
|
begin
|
|
location.loc:=LOC_REGISTER;
|
|
if (registers32<2) then
|
|
registers32:=2;
|
|
end;
|
|
end
|
|
else if is_integer(left.resulttype.def) then
|
|
begin
|
|
if (left.location.loc<>LOC_REGISTER) and
|
|
(registers32<1) then
|
|
registers32:=1;
|
|
location.loc:=LOC_REGISTER;
|
|
end
|
|
end;
|
|
|
|
begin
|
|
cmoddivnode:=tmoddivnode;
|
|
cshlshrnode:=tshlshrnode;
|
|
cunaryminusnode:=tunaryminusnode;
|
|
cnotnode:=tnotnode;
|
|
end.
|
|
{
|
|
$Log$
|
|
Revision 1.34 2002-05-18 13:34:10 peter
|
|
* readded missing revisions
|
|
|
|
Revision 1.33 2002/05/16 19:46:39 carl
|
|
+ defines.inc -> fpcdefs.inc to avoid conflicts if compiling by hand
|
|
+ try to fix temp allocation (still in ifdef)
|
|
+ generic constructor calls
|
|
+ start of tassembler / tmodulebase class cleanup
|
|
|
|
Revision 1.31 2002/04/07 13:26:10 carl
|
|
+ change unit use
|
|
|
|
Revision 1.30 2002/04/02 17:11:29 peter
|
|
* tlocation,treference update
|
|
* LOC_CONSTANT added for better constant handling
|
|
* secondadd splitted in multiple routines
|
|
* location_force_reg added for loading a location to a register
|
|
of a specified size
|
|
* secondassignment parses now first the right and then the left node
|
|
(this is compatible with Kylix). This saves a lot of push/pop especially
|
|
with string operations
|
|
* adapted some routines to use the new cg methods
|
|
|
|
Revision 1.29 2002/03/04 19:10:11 peter
|
|
* removed compiler warnings
|
|
|
|
Revision 1.28 2002/02/11 11:45:51 michael
|
|
* Compilation without mmx support fixed from Peter
|
|
|
|
}
|