{ Copyright (c) 1998-2002 by Florian Klaempfl Generate i8086 inline nodes This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with this program; if not, write to the Free Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. **************************************************************************** } unit n8086inl; {$i fpcdefs.inc} interface uses nx86inl,node; type { ti8086inlinenode } ti8086inlinenode = class(tx86inlinenode) function typecheck_seg: tnode; override; function first_seg: tnode; override; procedure second_seg; override; procedure second_get_frame;override; procedure second_incdec;override; end; implementation uses ninl, systems, globtype,globals, cutils,verbose, constexp, symconst, defutil, aasmbase,aasmtai,aasmdata,aasmcpu, symtype,symdef,symcpu, cgbase,pass_2, cpuinfo,cpubase,paramgr, nbas,ncon,ncal,ncnv,nld,ncgutil, tgobj, cga,cgutils,cgx86,cgobj,hlcgobj, htypechk,procinfo; function ti8086inlinenode.typecheck_seg: tnode; begin result := nil; resultdef:=u16inttype; { don't allow constants } if is_constnode(left) then begin CGMessagePos(left.fileinfo,type_e_no_addr_of_constant); exit; end; end; function ti8086inlinenode.first_seg: tnode; begin expectloc:=LOC_REGISTER; result:=nil; end; procedure ti8086inlinenode.second_seg; var segref: treference; begin secondpass(left); if not(left.location.loc in [LOC_REFERENCE,LOC_CREFERENCE]) then internalerror(2013040101); { if a segment register is specified in ref, we use that } if left.location.reference.segment<>NR_NO then begin location_reset(location,LOC_REGISTER,OS_16); if is_segment_reg(left.location.reference.segment) then begin location.register:=cg.getintregister(current_asmdata.CurrAsmList,OS_16); current_asmdata.CurrAsmList.Concat(Taicpu.op_reg_reg(A_MOV,S_W,left.location.reference.segment,location.register)); end else location.register:=left.location.reference.segment; end { references relative to a symbol use the segment of the symbol, which can be obtained by the SEG directive } else if assigned(left.location.reference.symbol) then begin location_reset(location,LOC_REGISTER,OS_16); location.register:=cg.getintregister(current_asmdata.CurrAsmList,OS_16); reference_reset_symbol(segref,left.location.reference.symbol,0,0); segref.refaddr:=addr_seg; cg.a_load_ref_reg(current_asmdata.CurrAsmList,OS_16,OS_16,segref,location.register); end else if left.location.reference.base=NR_BP then begin location_reset(location,LOC_REGISTER,OS_16); location.register:=cg.getintregister(current_asmdata.CurrAsmList,OS_16); current_asmdata.CurrAsmList.concat(Taicpu.op_reg_reg(A_MOV,S_W,NR_SS,location.register)); end else begin location_reset(location,LOC_REGISTER,OS_16); location.register:=cg.getintregister(current_asmdata.CurrAsmList,OS_16); current_asmdata.CurrAsmList.Concat(Taicpu.op_reg_reg(A_MOV,S_W,NR_DS,location.register)); end; end; procedure ti8086inlinenode.second_get_frame; begin if current_settings.x86memorymodel in x86_far_data_models then begin if current_procinfo.framepointer=NR_STACK_POINTER_REG then internalerror(2014030201); location_reset(location,LOC_REGISTER,OS_32); location.register:=cg.getintregister(current_asmdata.CurrAsmList,OS_32); emit_reg_reg(A_MOV,S_W,current_procinfo.framepointer,location.register); current_asmdata.CurrAsmList.Concat(Taicpu.op_reg_reg(A_MOV,S_W,NR_SS,GetNextReg(location.register))); end else inherited second_get_frame; end; procedure ti8086inlinenode.second_incdec; const addsubop:array[in_inc_x..in_dec_x] of TOpCG=(OP_ADD,OP_SUB); var addvalue : TConstExprInt; addconstant : boolean; hregister : tregister; tmploc: tlocation; begin if is_farpointer(tcallparanode(left).left.resultdef) then begin { set defaults } addconstant:=true; hregister:=NR_NO; { first secondpass second argument, because if the first arg } { is used in that expression then SSL may move it to another } { register } if assigned(tcallparanode(left).right) then secondpass(tcallparanode(tcallparanode(left).right).left); { load first parameter, must be a reference } secondpass(tcallparanode(left).left); tmploc:=tcallparanode(left).left.location; tmploc.size:=OS_S16; { get addvalue } case tcallparanode(left).left.resultdef.typ of pointerdef : begin if is_void(tpointerdef(tcallparanode(left).left.resultdef).pointeddef) then addvalue:=1 else addvalue:=tpointerdef(tcallparanode(left).left.resultdef).pointeddef.size; end; else internalerror(10081); end; { second_ argument specified?, must be a s16bit in register } if assigned(tcallparanode(left).right) then begin { when constant, just multiply the addvalue } if is_constintnode(tcallparanode(tcallparanode(left).right).left) then addvalue:=addvalue*get_ordinal_value(tcallparanode(tcallparanode(left).right).left) else if is_constpointernode(tcallparanode(tcallparanode(left).right).left) then addvalue:=addvalue*tpointerconstnode(tcallparanode(tcallparanode(left).right).left).value else begin hlcg.location_force_reg(current_asmdata.CurrAsmList,tcallparanode(tcallparanode(left).right).left.location,tcallparanode(tcallparanode(left).right).left.resultdef,s16inttype,addvalue<=1); hregister:=tcallparanode(tcallparanode(left).right).left.location.register; { insert multiply with addvalue if its >1 } if addvalue>1 then hlcg.a_op_const_reg(current_asmdata.CurrAsmList,OP_IMUL,s16inttype,addvalue.svalue,hregister); addconstant:=false; end; end; { write the add instruction } if addconstant then begin hlcg.a_op_const_loc(current_asmdata.CurrAsmList,addsubop[inlinenumber],s16inttype, smallint(addvalue.svalue), tmploc); end else begin hlcg.a_op_reg_loc(current_asmdata.CurrAsmList,addsubop[inlinenumber],s16inttype, hregister,tmploc); end; end else inherited second_incdec; end; begin cinlinenode:=ti8086inlinenode; end.