mirror of
https://gitlab.com/freepascal.org/fpc/source.git
synced 2025-11-04 05:39:29 +01:00
a60a957420
to 0 or field_type(-1) (bug noted by Russell Davies on fpc-devel + his
test programs)
* fixed bit offset calculations for nested bitpacked record regvars
git-svn-id: trunk@11242 -
995 lines
43 KiB
ObjectPascal
995 lines
43 KiB
ObjectPascal
{
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Copyright (c) 1998-2002 by Florian Klaempfl
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Generate assembler for memory related nodes which are
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the same for all (most?) processors
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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 ncgmem;
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{$i fpcdefs.inc}
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interface
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uses
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globtype,cgbase,cpuinfo,cpubase,
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node,nmem;
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type
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tcgloadvmtaddrnode = class(tloadvmtaddrnode)
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procedure pass_generate_code;override;
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end;
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tcgloadparentfpnode = class(tloadparentfpnode)
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procedure pass_generate_code;override;
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end;
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tcgaddrnode = class(taddrnode)
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procedure pass_generate_code;override;
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end;
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tcgderefnode = class(tderefnode)
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procedure pass_generate_code;override;
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end;
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tcgsubscriptnode = class(tsubscriptnode)
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procedure pass_generate_code;override;
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end;
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tcgwithnode = class(twithnode)
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procedure pass_generate_code;override;
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end;
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tcgvecnode = class(tvecnode)
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private
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procedure rangecheck_array;
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protected
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function get_mul_size : aint;
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{# This routine is used to calculate the address of the reference.
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On entry reg contains the index in the array,
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and l contains the size of each element in the array.
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This routine should update location.reference correctly,
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so it points to the correct address.
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}
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procedure update_reference_reg_mul(reg:tregister;l:aint);virtual;
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procedure update_reference_reg_packed(reg:tregister;l:aint);virtual;
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procedure second_wideansistring;virtual;
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procedure second_dynamicarray;virtual;
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public
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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,globals,constexp,
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symconst,symdef,symsym,symtable,defutil,paramgr,
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aasmbase,aasmtai,aasmdata,
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procinfo,pass_2,parabase,
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pass_1,nld,ncon,nadd,nutils,
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cgutils,cgobj,
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tgobj,ncgutil
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;
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{*****************************************************************************
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TCGLOADVMTADDRNODE
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*****************************************************************************}
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procedure tcgloadvmtaddrnode.pass_generate_code;
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var
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href : treference;
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begin
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location_reset(location,LOC_REGISTER,OS_ADDR);
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if (left.nodetype=typen) then
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begin
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reference_reset_symbol(href,
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current_asmdata.RefAsmSymbol(tobjectdef(tclassrefdef(resultdef).pointeddef).vmt_mangledname),0);
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location.register:=cg.getaddressregister(current_asmdata.CurrAsmList);
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cg.a_loadaddr_ref_reg(current_asmdata.CurrAsmList,href,location.register);
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end
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else
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begin
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{ left contains self, load vmt from self }
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secondpass(left);
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gen_load_vmt_register(current_asmdata.CurrAsmList,tobjectdef(left.resultdef),left.location,location.register);
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end;
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end;
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{*****************************************************************************
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TCGLOADPARENTFPNODE
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*****************************************************************************}
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procedure tcgloadparentfpnode.pass_generate_code;
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var
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currpi : tprocinfo;
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hsym : tparavarsym;
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href : treference;
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begin
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if (current_procinfo.procdef.parast.symtablelevel=parentpd.parast.symtablelevel) then
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begin
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location_reset(location,LOC_REGISTER,OS_ADDR);
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location.register:=current_procinfo.framepointer;
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end
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else
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begin
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currpi:=current_procinfo;
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location_reset(location,LOC_REGISTER,OS_ADDR);
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location.register:=cg.getaddressregister(current_asmdata.CurrAsmList);
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{ load framepointer of current proc }
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hsym:=tparavarsym(currpi.procdef.parast.Find('parentfp'));
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if not assigned(hsym) then
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internalerror(200309281);
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cg.a_load_loc_reg(current_asmdata.CurrAsmList,OS_ADDR,hsym.localloc,location.register);
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{ walk parents }
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while (currpi.procdef.owner.symtablelevel>parentpd.parast.symtablelevel) do
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begin
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currpi:=currpi.parent;
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if not assigned(currpi) then
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internalerror(200311201);
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hsym:=tparavarsym(currpi.procdef.parast.Find('parentfp'));
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if not assigned(hsym) then
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internalerror(200309282);
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if hsym.localloc.loc<>LOC_REFERENCE then
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internalerror(200309283);
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reference_reset_base(href,location.register,hsym.localloc.reference.offset);
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cg.a_load_ref_reg(current_asmdata.CurrAsmList,OS_ADDR,OS_ADDR,href,location.register);
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end;
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end;
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end;
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{*****************************************************************************
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TCGADDRNODE
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*****************************************************************************}
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procedure tcgaddrnode.pass_generate_code;
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begin
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secondpass(left);
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location_reset(location,LOC_REGISTER,OS_ADDR);
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location.register:=cg.getaddressregister(current_asmdata.CurrAsmList);
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if not(left.location.loc in [LOC_REFERENCE,LOC_CREFERENCE]) then
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internalerror(2006111510);
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cg.a_loadaddr_ref_reg(current_asmdata.CurrAsmList,left.location.reference,location.register);
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end;
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{*****************************************************************************
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TCGDEREFNODE
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*****************************************************************************}
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procedure tcgderefnode.pass_generate_code;
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var
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paraloc1 : tcgpara;
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begin
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secondpass(left);
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location_reset(location,LOC_REFERENCE,def_cgsize(resultdef));
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case left.location.loc of
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LOC_CREGISTER,
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LOC_REGISTER:
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begin
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maybechangeloadnodereg(current_asmdata.CurrAsmList,left,true);
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{$ifdef cpu_uses_separate_address_registers}
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if getregtype(left.location.register)<>R_ADDRESSREGISTER then
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begin
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location.reference.base := cg.getaddressregister(current_asmdata.CurrAsmList);
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cg.a_load_reg_reg(current_asmdata.CurrAsmList,OS_ADDR,OS_ADDR,left.location.register,
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location.reference.base);
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end
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else
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{$endif}
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location.reference.base := left.location.register;
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end;
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LOC_CREFERENCE,
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LOC_REFERENCE:
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begin
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location.reference.base:=cg.getaddressregister(current_asmdata.CurrAsmList);
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cg.a_load_loc_reg(current_asmdata.CurrAsmList,OS_ADDR,left.location,location.reference.base);
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end;
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LOC_CONSTANT:
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begin
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location.reference.offset:=left.location.value;
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end;
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else
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internalerror(200507031);
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end;
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if (cs_use_heaptrc in current_settings.globalswitches) and
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(cs_checkpointer in current_settings.localswitches) and
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not(cs_compilesystem in current_settings.moduleswitches) and
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not(tpointerdef(left.resultdef).is_far) and
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not(nf_no_checkpointer in flags) then
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begin
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paraloc1.init;
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paramanager.getintparaloc(pocall_default,1,paraloc1);
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paramanager.allocparaloc(current_asmdata.CurrAsmList,paraloc1);
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cg.a_param_reg(current_asmdata.CurrAsmList, OS_ADDR,location.reference.base,paraloc1);
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paramanager.freeparaloc(current_asmdata.CurrAsmList,paraloc1);
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paraloc1.done;
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cg.allocallcpuregisters(current_asmdata.CurrAsmList);
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cg.a_call_name(current_asmdata.CurrAsmList,'FPC_CHECKPOINTER');
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cg.deallocallcpuregisters(current_asmdata.CurrAsmList);
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end;
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end;
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{*****************************************************************************
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TCGSUBSCRIPTNODE
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*****************************************************************************}
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procedure tcgsubscriptnode.pass_generate_code;
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var
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paraloc1 : tcgpara;
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sref: tsubsetreference;
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begin
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secondpass(left);
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if codegenerror then
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exit;
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paraloc1.init;
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{ classes and interfaces must be dereferenced implicit }
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if is_class_or_interface(left.resultdef) then
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begin
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location_reset(location,LOC_REFERENCE,def_cgsize(resultdef));
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case left.location.loc of
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LOC_CREGISTER,
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LOC_REGISTER:
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begin
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{$ifdef cpu_uses_separate_address_registers}
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if getregtype(left.location.register)<>R_ADDRESSREGISTER then
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begin
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location.reference.base:=rg.getaddressregister(current_asmdata.CurrAsmList);
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cg.a_load_reg_reg(current_asmdata.CurrAsmList,OS_ADDR,OS_ADDR,
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left.location.register,location.reference.base);
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end
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else
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{$endif}
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location.reference.base := left.location.register;
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end;
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LOC_CREFERENCE,
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LOC_REFERENCE:
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begin
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location.reference.base:=cg.getaddressregister(current_asmdata.CurrAsmList);
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cg.a_load_loc_reg(current_asmdata.CurrAsmList,OS_ADDR,left.location,location.reference.base);
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end;
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end;
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{ implicit deferencing }
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if (cs_use_heaptrc in current_settings.globalswitches) and
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(cs_checkpointer in current_settings.localswitches) and
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not(cs_compilesystem in current_settings.moduleswitches) then
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begin
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paramanager.getintparaloc(pocall_default,1,paraloc1);
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paramanager.allocparaloc(current_asmdata.CurrAsmList,paraloc1);
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cg.a_param_reg(current_asmdata.CurrAsmList, OS_ADDR,location.reference.base,paraloc1);
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paramanager.freeparaloc(current_asmdata.CurrAsmList,paraloc1);
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cg.allocallcpuregisters(current_asmdata.CurrAsmList);
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cg.a_call_name(current_asmdata.CurrAsmList,'FPC_CHECKPOINTER');
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cg.deallocallcpuregisters(current_asmdata.CurrAsmList);
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end;
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end
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else if is_interfacecom(left.resultdef) then
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begin
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location_reset(location,LOC_REFERENCE,def_cgsize(resultdef));
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tg.GetTempTyped(current_asmdata.CurrAsmList,left.resultdef,tt_normal,location.reference);
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cg.a_load_loc_ref(current_asmdata.CurrAsmList,OS_ADDR,left.location,location.reference);
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{ implicit deferencing also for interfaces }
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if (cs_use_heaptrc in current_settings.globalswitches) and
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(cs_checkpointer in current_settings.localswitches) and
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not(cs_compilesystem in current_settings.moduleswitches) then
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begin
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paramanager.getintparaloc(pocall_default,1,paraloc1);
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paramanager.allocparaloc(current_asmdata.CurrAsmList,paraloc1);
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cg.a_param_reg(current_asmdata.CurrAsmList, OS_ADDR,location.reference.base,paraloc1);
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paramanager.freeparaloc(current_asmdata.CurrAsmList,paraloc1);
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cg.allocallcpuregisters(current_asmdata.CurrAsmList);
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cg.a_call_name(current_asmdata.CurrAsmList,'FPC_CHECKPOINTER');
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cg.deallocallcpuregisters(current_asmdata.CurrAsmList);
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end;
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end
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else
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begin
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location_copy(location,left.location);
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{ some abi's require that functions return (some) records in }
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{ registers }
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case location.loc of
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LOC_REFERENCE,
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LOC_CREFERENCE:
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;
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LOC_REGISTER,
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LOC_CREGISTER:
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begin
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if (left.resultdef.size > sizeof(pint)) then
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location_force_mem(current_asmdata.CurrAsmList,location)
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else
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begin
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if (left.location.loc = LOC_REGISTER) then
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location.loc := LOC_SUBSETREG
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else
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location.loc := LOC_CSUBSETREG;
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location.size:=def_cgsize(resultdef);
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location.sreg.subsetreg := left.location.register;
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location.sreg.subsetregsize := left.location.size;
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if not is_packed_record_or_object(left.resultdef) then
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begin
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if (target_info.endian = ENDIAN_BIG) then
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location.sreg.startbit := (tcgsize2size[location.sreg.subsetregsize] - tcgsize2size[location.size] - vs.fieldoffset) * 8
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else
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location.sreg.startbit := (vs.fieldoffset * 8);
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location.sreg.bitlen := tcgsize2size[location.size] * 8;
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end
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else
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begin
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location.sreg.bitlen := resultdef.packedbitsize;
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if (target_info.endian = ENDIAN_BIG) then
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location.sreg.startbit := (tcgsize2size[location.sreg.subsetregsize]*8 - location.sreg.bitlen) - vs.fieldoffset
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else
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location.sreg.startbit := vs.fieldoffset;
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end;
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end;
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end;
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LOC_SUBSETREG,
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LOC_CSUBSETREG:
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begin
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location.size:=def_cgsize(resultdef);
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if not is_packed_record_or_object(left.resultdef) then
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begin
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if (target_info.endian = ENDIAN_BIG) then
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inc(location.sreg.startbit, (left.resultdef.size - tcgsize2size[location.size] - vs.fieldoffset) * 8)
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else
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inc(location.sreg.startbit, vs.fieldoffset * 8);
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location.sreg.bitlen := tcgsize2size[location.size] * 8;
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end
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else
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begin
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location.sreg.bitlen := resultdef.packedbitsize;
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if (target_info.endian = ENDIAN_BIG) then
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inc(location.sreg.startbit, left.location.sreg.bitlen - location.sreg.bitlen - vs.fieldoffset)
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else
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inc(location.sreg.startbit, vs.fieldoffset);
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end;
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end;
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else
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internalerror(2006031901);
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end;
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end;
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if (location.loc in [LOC_REFERENCE,LOC_CREFERENCE]) then
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begin
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if not is_packed_record_or_object(left.resultdef) then
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begin
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inc(location.reference.offset,vs.fieldoffset);
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{$ifdef SUPPORT_UNALIGNED}
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{ packed? }
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if (vs.owner.defowner.typ in [recorddef,objectdef]) and
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(tabstractrecordsymtable(vs.owner).usefieldalignment=1) then
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location.reference.alignment:=1;
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{$endif SUPPORT_UNALIGNED}
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end
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else if (vs.fieldoffset mod 8 = 0) and
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(resultdef.packedbitsize mod 8 = 0) and
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{ is different in case of e.g. packenum 2 and an enum }
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{ which fits in 8 bits }
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(resultdef.size*8 = resultdef.packedbitsize) then
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begin
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inc(location.reference.offset,vs.fieldoffset div 8);
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if (resultdef.size*8 <> resultdef.packedbitsize) then
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internalerror(2006082013);
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{ packed records always have an alignment of 1 }
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location.reference.alignment:=1;
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end
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else
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begin
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sref.ref:=location.reference;
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sref.ref.alignment:=1;
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sref.bitindexreg:=NR_NO;
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inc(sref.ref.offset,vs.fieldoffset div 8);
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sref.startbit:=vs.fieldoffset mod 8;
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sref.bitlen:=resultdef.packedbitsize;
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if (left.location.loc=LOC_REFERENCE) then
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location.loc:=LOC_SUBSETREF
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else
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location.loc:=LOC_CSUBSETREF;
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location.sref:=sref;
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end;
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{ also update the size of the location }
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location.size:=def_cgsize(resultdef);
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end;
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paraloc1.done;
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end;
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{*****************************************************************************
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TCGWITHNODE
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*****************************************************************************}
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procedure tcgwithnode.pass_generate_code;
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begin
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location_reset(location,LOC_VOID,OS_NO);
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if assigned(left) then
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secondpass(left);
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end;
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{*****************************************************************************
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TCGVECNODE
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*****************************************************************************}
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function tcgvecnode.get_mul_size : aint;
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begin
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if nf_memindex in flags then
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get_mul_size:=1
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else
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begin
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if (left.resultdef.typ=arraydef) then
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if not is_packed_array(left.resultdef) then
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get_mul_size:=tarraydef(left.resultdef).elesize
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else
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get_mul_size:=tarraydef(left.resultdef).elepackedbitsize
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else
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get_mul_size:=resultdef.size;
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end
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end;
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procedure tcgvecnode.update_reference_reg_mul(reg:tregister;l:aint);
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var
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hreg: tregister;
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begin
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if location.reference.base=NR_NO then
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begin
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if l<>1 then
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cg.a_op_const_reg(current_asmdata.CurrAsmList,OP_IMUL,OS_ADDR,l,reg);
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location.reference.base:=reg;
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end
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else if location.reference.index=NR_NO then
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begin
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if l<>1 then
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cg.a_op_const_reg(current_asmdata.CurrAsmList,OP_IMUL,OS_ADDR,l,reg);
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location.reference.index:=reg;
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end
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else
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begin
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hreg := cg.getaddressregister(current_asmdata.CurrAsmList);
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cg.a_loadaddr_ref_reg(current_asmdata.CurrAsmList,location.reference,hreg);
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reference_reset_base(location.reference,hreg,0);
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{ insert new index register }
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if l<>1 then
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cg.a_op_const_reg(current_asmdata.CurrAsmList,OP_IMUL,OS_ADDR,l,reg);
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location.reference.index:=reg;
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end;
|
|
end;
|
|
|
|
|
|
procedure tcgvecnode.update_reference_reg_packed(reg:tregister;l:aint);
|
|
var
|
|
sref: tsubsetreference;
|
|
offsetreg: tregister;
|
|
alignpower: aint;
|
|
temp : longint;
|
|
begin
|
|
{ only orddefs are bitpacked. Even then we only need special code in }
|
|
{ case the bitpacked *byte size* is not a power of two, otherwise }
|
|
{ everything can be handled using the the regular array code. }
|
|
if ((l mod 8) = 0) and
|
|
(ispowerof2(l div 8,temp) or
|
|
not is_ordinal(resultdef)) then
|
|
begin
|
|
update_reference_reg_mul(reg,l div 8);
|
|
exit;
|
|
end;
|
|
if (l > 8*sizeof(aint)) then
|
|
internalerror(200608051);
|
|
sref.ref := location.reference;
|
|
offsetreg := cg.getaddressregister(current_asmdata.CurrAsmList);
|
|
cg.a_op_const_reg(current_asmdata.CurrAsmList,OP_SUB,OS_INT,tarraydef(left.resultdef).lowrange,reg);
|
|
cg.a_op_const_reg(current_asmdata.CurrAsmList,OP_IMUL,OS_INT,l,reg);
|
|
{ keep alignment for index }
|
|
sref.ref.alignment := left.resultdef.alignment;
|
|
if not ispowerof2(sref.ref.alignment,temp) then
|
|
internalerror(2006081201);
|
|
alignpower:=temp;
|
|
cg.a_op_const_reg_reg(current_asmdata.CurrAsmList,OP_SHR,OS_ADDR,3+alignpower,reg,offsetreg);
|
|
cg.a_op_const_reg(current_asmdata.CurrAsmList,OP_SHL,OS_ADDR,alignpower,offsetreg);
|
|
if (sref.ref.base = NR_NO) then
|
|
sref.ref.base := offsetreg
|
|
else if (sref.ref.index = NR_NO) then
|
|
sref.ref.index := offsetreg
|
|
else
|
|
begin
|
|
cg.a_op_reg_reg(current_asmdata.CurrAsmList,OP_ADD,OS_ADDR,sref.ref.base,offsetreg);
|
|
sref.ref.base := offsetreg;
|
|
end;
|
|
cg.a_op_const_reg(current_asmdata.CurrAsmList,OP_AND,OS_INT,(1 shl (3+alignpower))-1,reg);
|
|
sref.bitindexreg := reg;
|
|
sref.startbit := 0;
|
|
sref.bitlen := resultdef.packedbitsize;
|
|
if (left.location.loc = LOC_REFERENCE) then
|
|
location.loc := LOC_SUBSETREF
|
|
else
|
|
location.loc := LOC_CSUBSETREF;
|
|
location.sref := sref;
|
|
end;
|
|
|
|
|
|
procedure tcgvecnode.second_wideansistring;
|
|
begin
|
|
end;
|
|
|
|
procedure tcgvecnode.second_dynamicarray;
|
|
begin
|
|
end;
|
|
|
|
|
|
procedure tcgvecnode.rangecheck_array;
|
|
var
|
|
hightree : tnode;
|
|
poslabel,
|
|
neglabel : tasmlabel;
|
|
hreg : tregister;
|
|
paraloc1,paraloc2 : tcgpara;
|
|
begin
|
|
paraloc1.init;
|
|
paraloc2.init;
|
|
if is_open_array(left.resultdef) or
|
|
is_array_of_const(left.resultdef) then
|
|
begin
|
|
{ cdecl functions don't have high() so we can not check the range }
|
|
{ (can't use current_procdef, since it may be a nested procedure) }
|
|
if not(tprocdef(tparasymtable(tparavarsym(tloadnode(left).symtableentry).owner).defowner).proccalloption in [pocall_cdecl,pocall_cppdecl]) then
|
|
begin
|
|
{ Get high value }
|
|
hightree:=load_high_value_node(tparavarsym(tloadnode(left).symtableentry));
|
|
{ it must be available }
|
|
if not assigned(hightree) then
|
|
internalerror(200212201);
|
|
firstpass(hightree);
|
|
secondpass(hightree);
|
|
{ generate compares }
|
|
if (right.location.loc in [LOC_REGISTER,LOC_CREGISTER]) then
|
|
hreg:=cg.makeregsize(current_asmdata.CurrAsmList,right.location.register,OS_INT)
|
|
else
|
|
begin
|
|
hreg:=cg.getintregister(current_asmdata.CurrAsmList,OS_INT);
|
|
cg.a_load_loc_reg(current_asmdata.CurrAsmList,OS_INT,right.location,hreg);
|
|
end;
|
|
current_asmdata.getjumplabel(neglabel);
|
|
current_asmdata.getjumplabel(poslabel);
|
|
cg.a_cmp_const_reg_label(current_asmdata.CurrAsmList,OS_INT,OC_LT,0,hreg,poslabel);
|
|
cg.a_cmp_loc_reg_label(current_asmdata.CurrAsmList,OS_INT,OC_BE,hightree.location,hreg,neglabel);
|
|
cg.a_label(current_asmdata.CurrAsmList,poslabel);
|
|
cg.a_call_name(current_asmdata.CurrAsmList,'FPC_RANGEERROR');
|
|
cg.a_label(current_asmdata.CurrAsmList,neglabel);
|
|
{ release hightree }
|
|
hightree.free;
|
|
end;
|
|
end
|
|
else
|
|
if is_dynamic_array(left.resultdef) then
|
|
begin
|
|
paramanager.getintparaloc(pocall_default,1,paraloc1);
|
|
paramanager.getintparaloc(pocall_default,2,paraloc2);
|
|
paramanager.allocparaloc(current_asmdata.CurrAsmList,paraloc2);
|
|
cg.a_param_loc(current_asmdata.CurrAsmList,right.location,paraloc2);
|
|
paramanager.allocparaloc(current_asmdata.CurrAsmList,paraloc1);
|
|
cg.a_param_loc(current_asmdata.CurrAsmList,left.location,paraloc1);
|
|
paramanager.freeparaloc(current_asmdata.CurrAsmList,paraloc1);
|
|
paramanager.freeparaloc(current_asmdata.CurrAsmList,paraloc2);
|
|
cg.allocallcpuregisters(current_asmdata.CurrAsmList);
|
|
cg.a_call_name(current_asmdata.CurrAsmList,'FPC_DYNARRAY_RANGECHECK');
|
|
cg.deallocallcpuregisters(current_asmdata.CurrAsmList);
|
|
end
|
|
else
|
|
cg.g_rangecheck(current_asmdata.CurrAsmList,right.location,right.resultdef,left.resultdef);
|
|
paraloc1.done;
|
|
paraloc2.done;
|
|
end;
|
|
|
|
|
|
procedure tcgvecnode.pass_generate_code;
|
|
|
|
var
|
|
offsetdec,
|
|
extraoffset : aint;
|
|
t : tnode;
|
|
href : treference;
|
|
otl,ofl : tasmlabel;
|
|
newsize : tcgsize;
|
|
mulsize,
|
|
bytemulsize,
|
|
alignpow : aint;
|
|
isjump : boolean;
|
|
paraloc1,
|
|
paraloc2 : tcgpara;
|
|
subsetref : tsubsetreference;
|
|
temp : longint;
|
|
begin
|
|
paraloc1.init;
|
|
paraloc2.init;
|
|
mulsize:=get_mul_size;
|
|
if not is_packed_array(left.resultdef) then
|
|
bytemulsize:=mulsize
|
|
else
|
|
bytemulsize:=mulsize div 8;
|
|
|
|
newsize:=def_cgsize(resultdef);
|
|
secondpass(left);
|
|
if left.location.loc=LOC_CREFERENCE then
|
|
location_reset(location,LOC_CREFERENCE,newsize)
|
|
else
|
|
location_reset(location,LOC_REFERENCE,newsize);
|
|
|
|
{ an ansistring needs to be dereferenced }
|
|
if is_ansistring(left.resultdef) or
|
|
is_widestring(left.resultdef) then
|
|
begin
|
|
if nf_callunique in flags then
|
|
internalerror(200304236);
|
|
|
|
{DM!!!!!}
|
|
case left.location.loc of
|
|
LOC_REGISTER,
|
|
LOC_CREGISTER :
|
|
begin
|
|
{$ifdef m68k}
|
|
location.reference.base:=cg.getaddressregister(current_asmdata.CurrAsmList);
|
|
cg.a_load_reg_reg(current_asmdata.CurrAsmList,OS_ADDR,OS_ADDR,left.location.register,location.reference.base);
|
|
{$else m68k}
|
|
location.reference.base:=left.location.register;
|
|
{$endif m68k}
|
|
end;
|
|
LOC_CREFERENCE,
|
|
LOC_REFERENCE :
|
|
begin
|
|
location.reference.base:=cg.getaddressregister(current_asmdata.CurrAsmList);
|
|
cg.a_load_ref_reg(current_asmdata.CurrAsmList,OS_ADDR,OS_ADDR,left.location.reference,location.reference.base);
|
|
end;
|
|
else
|
|
internalerror(2002032218);
|
|
end;
|
|
|
|
{ check for a zero length string,
|
|
we can use the ansistring routine here }
|
|
if (cs_check_range in current_settings.localswitches) then
|
|
begin
|
|
paramanager.getintparaloc(pocall_default,1,paraloc1);
|
|
paramanager.allocparaloc(current_asmdata.CurrAsmList,paraloc1);
|
|
cg.a_param_reg(current_asmdata.CurrAsmList,OS_ADDR,location.reference.base,paraloc1);
|
|
paramanager.freeparaloc(current_asmdata.CurrAsmList,paraloc1);
|
|
cg.allocallcpuregisters(current_asmdata.CurrAsmList);
|
|
cg.a_call_name(current_asmdata.CurrAsmList,'FPC_'+upper(tstringdef(left.resultdef).stringtypname)+'_CHECKZERO');
|
|
cg.deallocallcpuregisters(current_asmdata.CurrAsmList);
|
|
end;
|
|
|
|
{ in ansistrings/widestrings S[1] is p<w>char(S)[0] !! }
|
|
if is_ansistring(left.resultdef) then
|
|
offsetdec:=1
|
|
else
|
|
offsetdec:=2;
|
|
dec(location.reference.offset,offsetdec);
|
|
end
|
|
else if is_dynamic_array(left.resultdef) then
|
|
begin
|
|
case left.location.loc of
|
|
LOC_REGISTER,
|
|
LOC_CREGISTER :
|
|
location.reference.base:=left.location.register;
|
|
LOC_REFERENCE,
|
|
LOC_CREFERENCE :
|
|
begin
|
|
location.reference.base:=cg.getaddressregister(current_asmdata.CurrAsmList);
|
|
cg.a_load_ref_reg(current_asmdata.CurrAsmList,OS_ADDR,OS_ADDR,
|
|
left.location.reference,location.reference.base);
|
|
end;
|
|
else
|
|
internalerror(2002032219);
|
|
end;
|
|
end
|
|
else
|
|
location_copy(location,left.location);
|
|
|
|
{ location must be memory }
|
|
if not(location.loc in [LOC_REFERENCE,LOC_CREFERENCE]) then
|
|
internalerror(200411013);
|
|
|
|
{ offset can only differ from 0 if arraydef }
|
|
if (left.resultdef.typ=arraydef) and
|
|
not(is_dynamic_array(left.resultdef)) and
|
|
(not(is_packed_array(left.resultdef)) or
|
|
((mulsize mod 8 = 0) and
|
|
ispowerof2(mulsize div 8,temp)) or
|
|
{ only orddefs are bitpacked }
|
|
not is_ordinal(resultdef)) then
|
|
dec(location.reference.offset,bytemulsize*tarraydef(left.resultdef).lowrange);
|
|
|
|
if right.nodetype=ordconstn then
|
|
begin
|
|
{ offset can only differ from 0 if arraydef }
|
|
case left.resultdef.typ of
|
|
arraydef :
|
|
begin
|
|
{ do not do any range checking when this is an array access to a pointer which has been
|
|
typecasted from an array }
|
|
if (not (ado_isconvertedpointer in tarraydef(left.resultdef).arrayoptions)) then
|
|
begin
|
|
if not(is_open_array(left.resultdef)) and
|
|
not(is_array_of_const(left.resultdef)) and
|
|
not(is_dynamic_array(left.resultdef)) then
|
|
begin
|
|
if (tordconstnode(right).value.svalue>tarraydef(left.resultdef).highrange) or
|
|
(tordconstnode(right).value.svalue<tarraydef(left.resultdef).lowrange) then
|
|
begin
|
|
{ this should be caught in the typecheckpass! (JM) }
|
|
if (cs_check_range in current_settings.localswitches) then
|
|
CGMessage(parser_e_range_check_error)
|
|
else
|
|
CGMessage(parser_w_range_check_error);
|
|
end;
|
|
end
|
|
else
|
|
begin
|
|
{ range checking for open and dynamic arrays needs
|
|
runtime code }
|
|
secondpass(right);
|
|
if (cs_check_range in current_settings.localswitches) then
|
|
rangecheck_array;
|
|
end;
|
|
end;
|
|
end;
|
|
stringdef :
|
|
begin
|
|
if (cs_check_range in current_settings.localswitches) then
|
|
begin
|
|
case tstringdef(left.resultdef).stringtype of
|
|
{ it's the same for ansi- and wide strings }
|
|
st_widestring,
|
|
st_ansistring:
|
|
begin
|
|
paramanager.getintparaloc(pocall_default,1,paraloc1);
|
|
paramanager.getintparaloc(pocall_default,2,paraloc2);
|
|
paramanager.allocparaloc(current_asmdata.CurrAsmList,paraloc2);
|
|
cg.a_param_const(current_asmdata.CurrAsmList,OS_INT,tordconstnode(right).value.svalue,paraloc2);
|
|
href:=location.reference;
|
|
paramanager.allocparaloc(current_asmdata.CurrAsmList,paraloc1);
|
|
if not(tf_winlikewidestring in target_info.flags) or
|
|
(tstringdef(left.resultdef).stringtype<>st_widestring) then
|
|
begin
|
|
dec(href.offset,sizeof(pint)-offsetdec);
|
|
cg.a_param_ref(current_asmdata.CurrAsmList,OS_ADDR,href,paraloc1);
|
|
end
|
|
else
|
|
begin
|
|
{ winlike widestrings have a 4 byte length }
|
|
dec(href.offset,4-offsetdec);
|
|
cg.a_param_ref(current_asmdata.CurrAsmList,OS_32,href,paraloc1);
|
|
end;
|
|
paramanager.freeparaloc(current_asmdata.CurrAsmList,paraloc1);
|
|
paramanager.freeparaloc(current_asmdata.CurrAsmList,paraloc2);
|
|
cg.allocallcpuregisters(current_asmdata.CurrAsmList);
|
|
cg.a_call_name(current_asmdata.CurrAsmList,'FPC_'+upper(tstringdef(left.resultdef).stringtypname)+'_RANGECHECK');
|
|
cg.deallocallcpuregisters(current_asmdata.CurrAsmList);
|
|
end;
|
|
|
|
st_shortstring:
|
|
begin
|
|
{!!!!!!!!!!!!!!!!!}
|
|
{ if this one is implemented making use of the high parameter for openshortstrings, update ncgutils.do_get_used_regvars() too (JM) }
|
|
end;
|
|
|
|
st_longstring:
|
|
begin
|
|
{!!!!!!!!!!!!!!!!!}
|
|
end;
|
|
end;
|
|
end;
|
|
end;
|
|
end;
|
|
if not(is_packed_array(left.resultdef)) or
|
|
((mulsize mod 8 = 0) and
|
|
(ispowerof2(mulsize div 8,temp) or
|
|
{ only orddefs are bitpacked }
|
|
not is_ordinal(resultdef))) then
|
|
begin
|
|
inc(location.reference.offset,
|
|
bytemulsize*tordconstnode(right).value.svalue);
|
|
{ don't do this for floats etc.; needed to properly set the }
|
|
{ size for bitpacked arrays (e.g. a bitpacked array of }
|
|
{ enums who are size 2 but fit in one byte -> in the array }
|
|
{ they will be one byte and have to be stored like that) }
|
|
if is_packed_array(left.resultdef) and
|
|
(tcgsize2size[newsize] <> bytemulsize) then
|
|
newsize:=int_cgsize(bytemulsize);
|
|
end
|
|
else
|
|
begin
|
|
subsetref.ref := location.reference;
|
|
subsetref.ref.alignment := left.resultdef.alignment;
|
|
if not ispowerof2(subsetref.ref.alignment,temp) then
|
|
internalerror(2006081212);
|
|
alignpow:=temp;
|
|
inc(subsetref.ref.offset,((mulsize * (tordconstnode(right).value.svalue-tarraydef(left.resultdef).lowrange)) shr (3+alignpow)) shl alignpow);
|
|
subsetref.bitindexreg := NR_NO;
|
|
subsetref.startbit := (mulsize * (tordconstnode(right).value.svalue-tarraydef(left.resultdef).lowrange)) and ((1 shl (3+alignpow))-1);
|
|
subsetref.bitlen := resultdef.packedbitsize;
|
|
if (left.location.loc = LOC_REFERENCE) then
|
|
location.loc := LOC_SUBSETREF
|
|
else
|
|
location.loc := LOC_CSUBSETREF;
|
|
location.sref := subsetref;
|
|
end;
|
|
end
|
|
else
|
|
{ not nodetype=ordconstn }
|
|
begin
|
|
if (cs_opt_level1 in current_settings.optimizerswitches) and
|
|
{ if we do range checking, we don't }
|
|
{ need that fancy code (it would be }
|
|
{ buggy) }
|
|
not(cs_check_range in current_settings.localswitches) and
|
|
(left.resultdef.typ=arraydef) and
|
|
not is_packed_array(left.resultdef) then
|
|
begin
|
|
extraoffset:=0;
|
|
if (right.nodetype=addn) then
|
|
begin
|
|
if taddnode(right).right.nodetype=ordconstn then
|
|
begin
|
|
extraoffset:=tordconstnode(taddnode(right).right).value.svalue;
|
|
t:=taddnode(right).left;
|
|
taddnode(right).left:=nil;
|
|
right.free;
|
|
right:=t;
|
|
end
|
|
else if taddnode(right).left.nodetype=ordconstn then
|
|
begin
|
|
extraoffset:=tordconstnode(taddnode(right).left).value.svalue;
|
|
t:=taddnode(right).right;
|
|
taddnode(right).right:=nil;
|
|
right.free;
|
|
right:=t;
|
|
end;
|
|
end
|
|
else if (right.nodetype=subn) then
|
|
begin
|
|
if taddnode(right).right.nodetype=ordconstn then
|
|
begin
|
|
extraoffset:=-tordconstnode(taddnode(right).right).value.svalue;
|
|
t:=taddnode(right).left;
|
|
taddnode(right).left:=nil;
|
|
right.free;
|
|
right:=t;
|
|
end;
|
|
end;
|
|
inc(location.reference.offset,
|
|
mulsize*extraoffset);
|
|
end;
|
|
{ calculate from left to right }
|
|
if not(location.loc in [LOC_CREFERENCE,LOC_REFERENCE]) then
|
|
internalerror(200304237);
|
|
isjump:=(right.expectloc=LOC_JUMP);
|
|
if isjump then
|
|
begin
|
|
otl:=current_procinfo.CurrTrueLabel;
|
|
current_asmdata.getjumplabel(current_procinfo.CurrTrueLabel);
|
|
ofl:=current_procinfo.CurrFalseLabel;
|
|
current_asmdata.getjumplabel(current_procinfo.CurrFalseLabel);
|
|
end;
|
|
secondpass(right);
|
|
|
|
{ if mulsize = 1, we won't have to modify the index }
|
|
location_force_reg(current_asmdata.CurrAsmList,right.location,OS_ADDR,not is_packed_array(left.resultdef) and (mulsize = 1) );
|
|
|
|
if isjump then
|
|
begin
|
|
current_procinfo.CurrTrueLabel:=otl;
|
|
current_procinfo.CurrFalseLabel:=ofl;
|
|
end
|
|
else if (right.location.loc = LOC_JUMP) then
|
|
internalerror(2006010801);
|
|
|
|
{ only range check now, we can't range check loc_flags/loc_jump }
|
|
if cs_check_range in current_settings.localswitches then
|
|
begin
|
|
if left.resultdef.typ=arraydef then
|
|
rangecheck_array;
|
|
end;
|
|
|
|
{ produce possible range check code: }
|
|
if cs_check_range in current_settings.localswitches then
|
|
begin
|
|
if left.resultdef.typ=arraydef then
|
|
begin
|
|
{ done defore (PM) }
|
|
end
|
|
else if (left.resultdef.typ=stringdef) then
|
|
begin
|
|
case tstringdef(left.resultdef).stringtype of
|
|
{ it's the same for ansi- and wide strings }
|
|
st_widestring,
|
|
st_ansistring:
|
|
begin
|
|
paramanager.getintparaloc(pocall_default,1,paraloc1);
|
|
paramanager.getintparaloc(pocall_default,2,paraloc2);
|
|
paramanager.allocparaloc(current_asmdata.CurrAsmList,paraloc2);
|
|
cg.a_param_reg(current_asmdata.CurrAsmList,OS_INT,right.location.register,paraloc2);
|
|
href:=location.reference;
|
|
dec(href.offset,sizeof(pint)-offsetdec);
|
|
|
|
href:=location.reference;
|
|
paramanager.allocparaloc(current_asmdata.CurrAsmList,paraloc1);
|
|
if not(tf_winlikewidestring in target_info.flags) or
|
|
(tstringdef(left.resultdef).stringtype<>st_widestring) then
|
|
begin
|
|
dec(href.offset,sizeof(pint)-offsetdec);
|
|
cg.a_param_ref(current_asmdata.CurrAsmList,OS_ADDR,href,paraloc1);
|
|
end
|
|
else
|
|
begin
|
|
{ winlike widestrings have a 4 byte length }
|
|
dec(href.offset,4-offsetdec);
|
|
cg.a_param_ref(current_asmdata.CurrAsmList,OS_32,href,paraloc1);
|
|
end;
|
|
|
|
paramanager.freeparaloc(current_asmdata.CurrAsmList,paraloc1);
|
|
paramanager.freeparaloc(current_asmdata.CurrAsmList,paraloc2);
|
|
cg.allocallcpuregisters(current_asmdata.CurrAsmList);
|
|
cg.a_call_name(current_asmdata.CurrAsmList,'FPC_'+upper(tstringdef(left.resultdef).stringtypname)+'_RANGECHECK');
|
|
cg.deallocallcpuregisters(current_asmdata.CurrAsmList);
|
|
end;
|
|
st_shortstring:
|
|
begin
|
|
{!!!!!!!!!!!!!!!!!}
|
|
end;
|
|
st_longstring:
|
|
begin
|
|
{!!!!!!!!!!!!!!!!!}
|
|
end;
|
|
end;
|
|
end;
|
|
end;
|
|
|
|
{ insert the register and the multiplication factor in the
|
|
reference }
|
|
if not is_packed_array(left.resultdef) then
|
|
update_reference_reg_mul(right.location.register,mulsize)
|
|
else
|
|
update_reference_reg_packed(right.location.register,mulsize);
|
|
end;
|
|
|
|
location.size:=newsize;
|
|
paraloc1.done;
|
|
paraloc2.done;
|
|
end;
|
|
|
|
|
|
begin
|
|
cloadvmtaddrnode:=tcgloadvmtaddrnode;
|
|
cloadparentfpnode:=tcgloadparentfpnode;
|
|
caddrnode:=tcgaddrnode;
|
|
cderefnode:=tcgderefnode;
|
|
csubscriptnode:=tcgsubscriptnode;
|
|
cwithnode:=tcgwithnode;
|
|
cvecnode:=tcgvecnode;
|
|
end.
|