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https://gitlab.com/freepascal.org/fpc/source.git
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276 lines
9.4 KiB
ObjectPascal
276 lines
9.4 KiB
ObjectPascal
{
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Copyright (c) 2008 by Florian Klaempfl
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Code generation for add nodes on the AVR
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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 navradd;
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{$i fpcdefs.inc}
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interface
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uses
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node,ncgadd,cpubase;
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type
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tavraddnode = class(tcgaddnode)
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private
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function GetResFlags(unsigned:Boolean):TResFlags;
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protected
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function pass_1 : tnode;override;
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procedure second_cmpordinal;override;
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procedure second_cmpsmallset;override;
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procedure second_cmp64bit;override;
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end;
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implementation
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uses
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globtype,systems,
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cutils,verbose,globals,
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symconst,symdef,paramgr,
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aasmbase,aasmtai,aasmdata,aasmcpu,defutil,htypechk,
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cgbase,cgutils,cgcpu,
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cpuinfo,pass_1,pass_2,regvars,procinfo,
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cpupara,
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ncon,nset,nadd,
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ncgutil,tgobj,rgobj,rgcpu,cgobj,cg64f32;
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{*****************************************************************************
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TSparcAddNode
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*****************************************************************************}
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function tavraddnode.GetResFlags(unsigned:Boolean):TResFlags;
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begin
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case NodeType of
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equaln:
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GetResFlags:=F_EQ;
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unequaln:
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GetResFlags:=F_NE;
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else
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if not(unsigned) then
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begin
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if nf_swapped in flags then
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case NodeType of
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ltn:
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GetResFlags:=F_GT;
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lten:
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GetResFlags:=F_GE;
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gtn:
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GetResFlags:=F_LT;
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gten:
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GetResFlags:=F_LE;
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end
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else
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case NodeType of
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ltn:
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GetResFlags:=F_LT;
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lten:
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GetResFlags:=F_LE;
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gtn:
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GetResFlags:=F_GT;
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gten:
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GetResFlags:=F_GE;
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end;
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end
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else
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begin
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if nf_swapped in Flags then
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case NodeType of
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ltn:
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GetResFlags:=F_HI;
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lten:
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GetResFlags:=F_CS;
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gtn:
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GetResFlags:=F_CC;
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gten:
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GetResFlags:=F_LS;
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end
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else
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case NodeType of
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ltn:
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GetResFlags:=F_CC;
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lten:
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GetResFlags:=F_LS;
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gtn:
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GetResFlags:=F_HI;
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gten:
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GetResFlags:=F_CS;
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end;
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end;
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end;
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end;
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procedure tavraddnode.second_cmpsmallset;
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var
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tmpreg : tregister;
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begin
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{
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pass_left_right;
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location_reset(location,LOC_FLAGS,OS_NO);
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force_reg_left_right(false,false);
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case nodetype of
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equaln:
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begin
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current_asmdata.CurrAsmList.concat(taicpu.op_reg_reg(A_CMP,left.location.register,right.location.register));
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location.resflags:=F_EQ;
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end;
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unequaln:
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begin
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current_asmdata.CurrAsmList.concat(taicpu.op_reg_reg(A_CMP,left.location.register,right.location.register));
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location.resflags:=F_NE;
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end;
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lten,
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gten:
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begin
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if (not(nf_swapped in flags) and
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(nodetype = lten)) or
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((nf_swapped in flags) and
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(nodetype = gten)) then
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swapleftright;
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tmpreg:=cg.getintregister(current_asmdata.CurrAsmList,location.size);
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current_asmdata.CurrAsmList.concat(taicpu.op_reg_reg_reg(A_AND,tmpreg,left.location.register,right.location.register));
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current_asmdata.CurrAsmList.concat(taicpu.op_reg_reg(A_CMP,tmpreg,right.location.register));
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location.resflags:=F_EQ;
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end;
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else
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internalerror(2004012401);
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end;
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}
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end;
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procedure tavraddnode.second_cmp64bit;
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var
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unsigned : boolean;
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oldnodetype : tnodetype;
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begin
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{
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pass_left_right;
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force_reg_left_right(false,false);
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unsigned:=not(is_signed(left.resultdef)) or
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not(is_signed(right.resultdef));
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{ operation requiring proper N, Z and C flags ? }
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if unsigned or (nodetype in [equaln,unequaln]) then
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begin
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location_reset(location,LOC_FLAGS,OS_NO);
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location.resflags:=getresflags(unsigned);
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current_asmdata.CurrAsmList.concat(taicpu.op_reg_reg(A_CMP,left.location.register64.reghi,right.location.register64.reghi));
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current_asmdata.CurrAsmList.concat(setcondition(taicpu.op_reg_reg(A_CMP,left.location.register64.reglo,right.location.register64.reglo),C_EQ));
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end
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else
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{ operation requiring proper N, Z and V flags ? }
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begin
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location_reset(location,LOC_JUMP,OS_NO);
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current_asmdata.CurrAsmList.concat(taicpu.op_reg_reg(A_CMP,left.location.register64.reghi,right.location.register64.reghi));
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{ the jump the sequence is a little bit hairy }
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case nodetype of
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ltn,gtn:
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begin
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cg.a_jmp_flags(current_asmdata.CurrAsmList,getresflags(false),current_procinfo.CurrTrueLabel);
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{ cheat a little bit for the negative test }
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toggleflag(nf_swapped);
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cg.a_jmp_flags(current_asmdata.CurrAsmList,getresflags(false),current_procinfo.CurrFalseLabel);
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toggleflag(nf_swapped);
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end;
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lten,gten:
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begin
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oldnodetype:=nodetype;
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if nodetype=lten then
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nodetype:=ltn
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else
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nodetype:=gtn;
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cg.a_jmp_flags(current_asmdata.CurrAsmList,getresflags(unsigned),current_procinfo.CurrTrueLabel);
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{ cheat for the negative test }
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if nodetype=ltn then
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nodetype:=gtn
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else
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nodetype:=ltn;
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cg.a_jmp_flags(current_asmdata.CurrAsmList,getresflags(unsigned),current_procinfo.CurrFalseLabel);
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nodetype:=oldnodetype;
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end;
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end;
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current_asmdata.CurrAsmList.concat(taicpu.op_reg_reg(A_CMP,left.location.register64.reglo,right.location.register64.reglo));
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{ the comparisaion of the low dword have to be
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always unsigned! }
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cg.a_jmp_flags(current_asmdata.CurrAsmList,getresflags(true),current_procinfo.CurrTrueLabel);
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cg.a_jmp_always(current_asmdata.CurrAsmList,current_procinfo.CurrFalseLabel);
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end;
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}
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end;
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function tavraddnode.pass_1 : tnode;
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begin
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result:=inherited pass_1;
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{ handling boolean expressions }
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if not(assigned(result)) and
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(
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not(is_boolean(left.resultdef)) or
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not(is_boolean(right.resultdef)) or
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is_dynamic_array(left.resultdef)
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) then
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expectloc:=LOC_FLAGS;
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end;
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procedure tavraddnode.second_cmpordinal;
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var
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unsigned : boolean;
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tmpreg : tregister;
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b : byte;
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begin
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{
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pass_left_right;
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force_reg_left_right(true,true);
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unsigned:=not(is_signed(left.resultdef)) or
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not(is_signed(right.resultdef));
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if right.location.loc = LOC_CONSTANT then
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begin
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if is_shifter_const(right.location.value,b) then
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current_asmdata.CurrAsmList.concat(taicpu.op_reg_const(A_CMP,left.location.register,right.location.value))
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else
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begin
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tmpreg:=cg.getintregister(current_asmdata.CurrAsmList,location.size);
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cg.a_load_const_reg(current_asmdata.CurrAsmList,OS_INT,
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right.location.value,tmpreg);
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current_asmdata.CurrAsmList.concat(taicpu.op_reg_reg(A_CMP,left.location.register,tmpreg));
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end;
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end
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else
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current_asmdata.CurrAsmList.concat(taicpu.op_reg_reg(A_CMP,left.location.register,right.location.register));
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location_reset(location,LOC_FLAGS,OS_NO);
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location.resflags:=getresflags(unsigned);
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}
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end;
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begin
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caddnode:=tavraddnode;
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end.
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