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104 lines
3.7 KiB
ObjectPascal
104 lines
3.7 KiB
ObjectPascal
{
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Copyright (c) 2011 by Jonas Maebe
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Generate JVM byetcode for in memory related 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 njvmmem;
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{$i fpcdefs.inc}
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interface
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uses
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globtype,
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cgbase,cpubase,
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node,nmem,ncgmem;
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type
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tjvmvecnode = class(tcgvecnode)
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procedure pass_generate_code;override;
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end;
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implementation
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uses
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systems,
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cutils,verbose,
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symdef,defutil,
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aasmdata,pass_2,
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cgutils,hlcgobj;
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{*****************************************************************************
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TJVMVECNODE
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*****************************************************************************}
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procedure tjvmvecnode.pass_generate_code;
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var
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newsize: tcgsize;
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begin
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{ This routine is not used for Strings, as they are a class type and
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you have to use charAt() there to load a character (and you cannot
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change characters; you have to create a new string in that case)
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As far as arrays are concerned: we have to create a trefererence
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with arrayreftype in [art_indexreg,art_indexref], and ref.base =
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pointer to the array (i.e., left.location.register) }
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secondpass(left);
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newsize:=def_cgsize(resultdef);
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if left.location.loc=LOC_CREFERENCE then
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location_reset_ref(location,LOC_CREFERENCE,newsize,left.location.reference.alignment)
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else
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location_reset_ref(location,LOC_REFERENCE,newsize,left.location.reference.alignment);
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hlcg.location_force_reg(current_asmdata.CurrAsmList,left.location,left.resultdef,left.resultdef,true);
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location.reference.base:=left.location.register;
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secondpass(right);
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{ simplify index location if necessary, since array references support
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an index in memory, but not an another array index }
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if (right.location.loc in [LOC_REFERENCE,LOC_CREFERENCE]) and
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(right.location.reference.arrayreftype<>art_none) then
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hlcg.location_force_reg(current_asmdata.CurrAsmList,right.location,right.resultdef,right.resultdef,true);
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case right.location.loc of
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LOC_REGISTER,LOC_CREGISTER:
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begin
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location.reference.arrayreftype:=art_indexreg;
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location.reference.index:=right.location.register;
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end;
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LOC_REFERENCE,LOC_CREFERENCE:
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begin
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location.reference.arrayreftype:=art_indexref;
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location.reference.indexbase:=right.location.reference.base;
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location.reference.indexsymbol:=right.location.reference.symbol;
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location.reference.indexoffset:=right.location.reference.offset;
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end;
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LOC_CONSTANT:
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begin
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location.reference.arrayreftype:=art_indexconst;
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location.reference.indexoffset:=right.location.value;
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end
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else
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internalerror(2011012002);
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end;
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end;
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begin
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cvecnode:=tjvmvecnode;
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end.
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