{ $Id$ Copyright (c) 1993-98 by Florian Klaempfl Generate i386 assembler for type converting 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. **************************************************************************** } {$ifdef TP} {$E+,F+,N+,D+,L+,Y+} {$endif} unit cg386cnv; interface uses tree; procedure secondtypeconv(var p : ptree); procedure secondas(var p : ptree); procedure secondis(var p : ptree); implementation uses cobjects,verbose,globals,systems, symtable,aasm,types, hcodegen,temp_gen,pass_2, i386,cgai386,tgeni386; {***************************************************************************** SecondTypeConv *****************************************************************************} type tsecondconvproc = procedure(pto,pfrom : ptree;convtyp : tconverttype); {$ifndef OLDCNV} procedure second_int_to_int(pto,pfrom : ptree;convtyp : tconverttype); var op : tasmop; opsize : topsize; hregister : tregister; begin { is the result size smaller ? } if pto^.resulttype^.sizepfrom^.resulttype^.size then begin { insert range check if necessary } emitrangecheck(pfrom,pto^.resulttype); { remove reference } if not(pfrom^.location.loc in [LOC_REGISTER,LOC_CREGISTER]) then begin del_reference(pfrom^.location.reference); { we can do this here as we need no temp inside } ungetiftemp(pfrom^.location.reference); end; { get op and opsize, handle separate for constants, becuase movz doesn't support constant values } if (pfrom^.location.loc=LOC_MEM) and (pfrom^.location.reference.isintvalue) then begin opsize:=def_opsize(pto^.resulttype); op:=A_MOV; end else begin opsize:=def2def_opsize(pfrom^.resulttype,pto^.resulttype); if opsize in [S_B,S_W,S_L] then op:=A_MOV else if is_signed(pfrom^.resulttype) then op:=A_MOVSX else op:=A_MOVZX; end; { load the register we need } if pfrom^.location.loc<>LOC_REGISTER then hregister:=getregister32 else hregister:=pfrom^.location.register; { set the correct register size and location } clear_location(pto^.location); pto^.location.loc:=LOC_REGISTER; case pto^.resulttype^.size of 1 : pto^.location.register:=makereg8(hregister); 2 : pto^.location.register:=makereg16(hregister); 4 : pto^.location.register:=makereg32(hregister); end; { insert the assembler code } if pfrom^.location.loc in [LOC_CREGISTER,LOC_REGISTER] then emit_reg_reg(op,opsize,pfrom^.location.register,pto^.location.register) else exprasmlist^.concat(new(pai386,op_ref_reg(op,opsize, newreference(pfrom^.location.reference),pto^.location.register))); end { the result size is equal } else begin { insert range check if necessary } emitrangecheck(pfrom,pto^.resulttype); end; end; {$else} procedure maybe_rangechecking(p : ptree;p2,p1 : pdef); { produces if necessary rangecheckcode } var hp : preference; hregister : tregister; neglabel,poslabel : plabel; is_register : boolean; begin { convert from p2 to p1 } { range check from enums is not made yet !!} { and its probably not easy } if (p1^.deftype<>orddef) or (p2^.deftype<>orddef) then exit; { range checking is different for u32bit } { lets try to generate it allways } if (cs_check_range in aktlocalswitches) and { with $R+ explicit type conversations in TP aren't range checked! } (not(p^.explizit) {or not(cs_tp_compatible in aktmoduleswitches)}) and ((porddef(p1)^.low>porddef(p2)^.low) or (porddef(p1)^.highporddef(p1)^.high then begin getlabel(neglabel); getlabel(poslabel); exprasmlist^.concat(new(pai386,op_reg_reg(A_OR,S_L,hregister,hregister))); emitl(A_JL,neglabel); end; exprasmlist^.concat(new(pai386,op_reg_ref(A_BOUND,S_L,hregister,hp))); if porddef(p1)^.low>porddef(p1)^.high then begin hp:=new_reference(R_NO,0); hp^.symbol:=stringdup(porddef(p1)^.getrangecheckstring); emitl(A_JMP,poslabel); emitl(A_LABEL,neglabel); exprasmlist^.concat(new(pai386,op_reg_ref(A_BOUND,S_L,hregister,hp))); emitl(A_LABEL,poslabel); end; end; end; procedure second_only_rangecheck(pto,pfrom : ptree;convtyp : tconverttype); begin maybe_rangechecking(pto,pfrom^.resulttype,pto^.resulttype); end; procedure second_smaller(pto,pfrom : ptree;convtyp : tconverttype); var hregister,destregister : tregister; ref : boolean; hpp : preference; begin ref:=false; { problems with enums !! } if (cs_check_range in aktlocalswitches) and { with $R+ explicit type conversations in TP aren't range checked! } (not(pto^.explizit) {or not(cs_tp_compatible in aktmoduleswitches)}) and (pto^.resulttype^.deftype=orddef) and (pfrom^.resulttype^.deftype=orddef) then begin if porddef(pfrom^.resulttype)^.typ=u32bit then begin { when doing range checking for u32bit, we have some trouble } { because BOUND assumes signed values } { first, we check if the values is greater than 2^31: } { the u32bit rangenr contains the appropriate rangenr } porddef(pfrom^.resulttype)^.genrangecheck; hregister:=R_EDI; if (pto^.location.loc=LOC_REGISTER) or (pto^.location.loc=LOC_CREGISTER) then hregister:=pto^.location.register else exprasmlist^.concat(new(pai386,op_ref_reg(A_MOV,S_L, newreference(pto^.location.reference),R_EDI))); hpp:=new_reference(R_NO,0); hpp^.symbol:=stringdup(porddef(pfrom^.resulttype)^.getrangecheckstring); exprasmlist^.concat(new(pai386,op_reg_ref(A_BOUND,S_L,hregister,hpp))); { then we do a normal range check } porddef(pto^.resulttype)^.genrangecheck; hpp:=new_reference(R_NO,0); hpp^.symbol:=stringdup(porddef(pto^.resulttype)^.getrangecheckstring); exprasmlist^.concat(new(pai386,op_reg_ref(A_BOUND,S_L,hregister,hpp))); end else if ((porddef(pto^.resulttype)^.low>porddef(pfrom^.resulttype)^.low) or (porddef(pto^.resulttype)^.highLOC_CREGISTER) then begin del_reference(pfrom^.location.reference); { we can do this here as we need no temp inside second_bigger } ungetiftemp(pfrom^.location.reference); end; { this is wrong !!! gives me movl (%eax),%eax for the length(string !!! use only for constant values } {Constant cannot be loaded into registers using MOVZX!} if (pfrom^.location.loc<>LOC_MEM) or (not pfrom^.location.reference.isintvalue) then case convtyp of tc_u8bit_2_s32bit,tc_u8bit_2_u32bit : begin if is_register then hregister:=reg8toreg32(pfrom^.location.register) else hregister:=getregister32; op:=A_MOVZX; opsize:=S_BL; end; { here what do we do for negative values ? } tc_s8bit_2_s32bit,tc_s8bit_2_u32bit : begin if is_register then hregister:=reg8toreg32(pfrom^.location.register) else hregister:=getregister32; op:=A_MOVSX; opsize:=S_BL; end; tc_u16bit_2_s32bit,tc_u16bit_2_u32bit : begin if is_register then hregister:=reg16toreg32(pfrom^.location.register) else hregister:=getregister32; op:=A_MOVZX; opsize:=S_WL; end; tc_s16bit_2_s32bit,tc_s16bit_2_u32bit : begin if is_register then hregister:=reg16toreg32(pfrom^.location.register) else hregister:=getregister32; op:=A_MOVSX; opsize:=S_WL; end; tc_s8bit_2_u16bit, tc_u8bit_2_s16bit, tc_u8bit_2_u16bit : begin if is_register then hregister:=reg8toreg16(pfrom^.location.register) else hregister:=reg32toreg16(getregister32); op:=A_MOVZX; opsize:=S_BW; end; tc_s8bit_2_s16bit : begin if is_register then hregister:=reg8toreg16(pfrom^.location.register) else hregister:=reg32toreg16(getregister32); op:=A_MOVSX; opsize:=S_BW; end; end else case convtyp of tc_u8bit_2_s32bit, tc_s8bit_2_s32bit, tc_u16bit_2_s32bit, tc_s16bit_2_s32bit, tc_u8bit_2_u32bit, tc_s8bit_2_u32bit, tc_u16bit_2_u32bit, tc_s16bit_2_u32bit: begin hregister:=getregister32; op:=A_MOV; opsize:=S_L; end; tc_s8bit_2_u16bit, tc_s8bit_2_s16bit, tc_u8bit_2_s16bit, tc_u8bit_2_u16bit: begin hregister:=reg32toreg16(getregister32); op:=A_MOV; opsize:=S_W; end; end; if is_register then begin emit_reg_reg(op,opsize,pfrom^.location.register,hregister); end else begin if pfrom^.location.loc=LOC_CREGISTER then emit_reg_reg(op,opsize,pfrom^.location.register,hregister) else exprasmlist^.concat(new(pai386,op_ref_reg(op,opsize, newreference(pfrom^.location.reference),hregister))); end; clear_location(pto^.location); pto^.location.loc:=LOC_REGISTER; pto^.location.register:=hregister; maybe_rangechecking(pto,pfrom^.resulttype,pto^.resulttype); end; {$endif} procedure second_string_to_string(pto,pfrom : ptree;convtyp : tconverttype); var pushed : tpushed; begin { does anybody know a better solution than this big case statement ? } { ok, a proc table would do the job } case pstringdef(pto^.resulttype)^.string_typ of st_shortstring: case pstringdef(pfrom^.resulttype)^.string_typ of st_shortstring: begin stringdispose(pto^.location.reference.symbol); gettempofsizereference(pto^.resulttype^.size,pto^.location.reference); del_reference(pfrom^.location.reference); copyshortstring(pto^.location.reference,pfrom^.location.reference, pstringdef(pto^.resulttype)^.len,false); ungetiftemp(pfrom^.location.reference); end; st_longstring: begin {!!!!!!!} internalerror(8888); end; st_ansistring: begin gettempofsizereference(pto^.resulttype^.size,pto^.location.reference); loadansi2short(pfrom,pto); end; st_widestring: begin {!!!!!!!} internalerror(8888); end; end; st_longstring: case pstringdef(pfrom^.resulttype)^.string_typ of st_shortstring: begin {!!!!!!!} internalerror(8888); end; st_ansistring: begin {!!!!!!!} internalerror(8888); end; st_widestring: begin {!!!!!!!} internalerror(8888); end; end; st_ansistring: case pstringdef(pfrom^.resulttype)^.string_typ of st_shortstring: begin gettempofsizereference(pto^.resulttype^.size,pto^.location.reference); exprasmlist^.concat(new(pai386,op_const_ref(A_MOV,S_L,0,newreference(pto^.location.reference)))); pushusedregisters(pushed,$ff); emit_push_lea_loc(pfrom^.location); emit_push_lea_loc(pto^.location); emitcall('FPC_SHORTSTR_TO_ANSISTR',true); maybe_loadesi; popusedregisters(pushed); end; st_longstring: begin {!!!!!!!} internalerror(8888); end; st_widestring: begin {!!!!!!!} internalerror(8888); end; end; st_widestring: case pstringdef(pfrom^.resulttype)^.string_typ of st_shortstring: begin {!!!!!!!} internalerror(8888); end; st_longstring: begin {!!!!!!!} internalerror(8888); end; st_ansistring: begin {!!!!!!!} internalerror(8888); end; st_widestring: begin {!!!!!!!} internalerror(8888); end; end; end; end; procedure second_cstring_to_pchar(pto,pfrom : ptree;convtyp : tconverttype); begin clear_location(pto^.location); pto^.location.loc:=LOC_REGISTER; pto^.location.register:=getregister32; case pstringdef(pfrom^.resulttype)^.string_typ of st_shortstring : begin inc(pfrom^.location.reference.offset); exprasmlist^.concat(new(pai386,op_ref_reg(A_LEA,S_L,newreference(pfrom^.location.reference), pto^.location.register))); end; st_ansistring : begin exprasmlist^.concat(new(pai386,op_ref_reg(A_LEA,S_L,newreference(pfrom^.location.reference), pto^.location.register))); end; st_longstring: begin {!!!!!!!} internalerror(8888); end; st_widestring: begin {!!!!!!!} internalerror(8888); end; end; end; procedure second_string_to_chararray(pto,pfrom : ptree;convtyp : tconverttype); begin case pstringdef(pfrom^.resulttype)^.string_typ of st_shortstring : begin inc(pto^.location.reference.offset); end; st_ansistring : begin {!!!!!!!} internalerror(8888); end; st_longstring: begin {!!!!!!!} internalerror(8888); end; st_widestring: begin {!!!!!!!} internalerror(8888); end; end; end; procedure second_array_to_pointer(pto,pfrom : ptree;convtyp : tconverttype); begin del_reference(pfrom^.location.reference); clear_location(pto^.location); pto^.location.loc:=LOC_REGISTER; pto^.location.register:=getregister32; exprasmlist^.concat(new(pai386,op_ref_reg(A_LEA,S_L,newreference(pfrom^.location.reference), pto^.location.register))); end; procedure second_pointer_to_array(pto,pfrom : ptree;convtyp : tconverttype); begin clear_location(pto^.location); pto^.location.loc:=LOC_REFERENCE; clear_reference(pto^.location.reference); case pfrom^.location.loc of LOC_REGISTER : pto^.location.reference.base:=pfrom^.location.register; LOC_CREGISTER : begin pto^.location.reference.base:=getregister32; emit_reg_reg(A_MOV,S_L,pfrom^.location.register,pto^.location.reference.base); end else begin del_reference(pfrom^.location.reference); pto^.location.reference.base:=getregister32; exprasmlist^.concat(new(pai386,op_ref_reg(A_MOV,S_L,newreference(pfrom^.location.reference), pto^.location.reference.base))); end; end; end; { generates the code for the type conversion from an array of char } { to a string } procedure second_chararray_to_string(pto,pfrom : ptree;convtyp : tconverttype); var l : longint; begin { this is a type conversion which copies the data, so we can't } { return a reference } clear_location(pto^.location); pto^.location.loc:=LOC_MEM; { first get the memory for the string } gettempofsizereference(256,pto^.location.reference); { calc the length of the array } l:=parraydef(pfrom^.resulttype)^.highrange- parraydef(pfrom^.resulttype)^.lowrange+1; if l>255 then CGMessage(type_e_mismatch); { write the length } exprasmlist^.concat(new(pai386,op_const_ref(A_MOV,S_B,l, newreference(pto^.location.reference)))); { copy to first char of string } inc(pto^.location.reference.offset); { generates the copy code } { and we need the source never } concatcopy(pfrom^.location.reference,pto^.location.reference,l,true,false); { correct the string location } dec(pto^.location.reference.offset); end; procedure second_char_to_string(pto,pfrom : ptree;convtyp : tconverttype); var pushed : tpushed; begin clear_location(pto^.location); pto^.location.loc:=LOC_MEM; case pstringdef(pto^.resulttype)^.string_typ of st_shortstring : begin gettempofsizereference(256,pto^.location.reference); { call loadstring with correct left and right } pto^.right:=pfrom; pto^.left:=pto; loadshortstring(pto); pto^.left:=nil; { reset left tree, which is empty } { pto^.right is not disposed for typeconv !! PM } disposetree(pto^.right); pto^.right:=nil; end; st_ansistring : begin gettempofsizereference(4,pto^.location.reference); {temptoremove^.concat(new(ptemptodestroy,init(pto^.location.reference,pto^.resulttype)));} exprasmlist^.concat(new(pai386,op_const_ref(A_MOV,S_L,0,newreference(pto^.location.reference)))); pushusedregisters(pushed,$ff); emit_pushw_loc(pfrom^.location); emitpushreferenceaddr(exprasmlist,pto^.location.reference); emitcall('FPC_CHAR_TO_ANSISTR',true); popusedregisters(pushed); maybe_loadesi; end; else internalerror(4179); end; end; procedure second_int_to_real(pto,pfrom : ptree;convtyp : tconverttype); var r : preference; hregister : tregister; begin { for u32bit a solution is to push $0 and to load a comp } { does this first, it destroys maybe EDI } hregister:=R_EDI; if porddef(pfrom^.resulttype)^.typ=u32bit then push_int(0); if (pfrom^.location.loc=LOC_REGISTER) or (pfrom^.location.loc=LOC_CREGISTER) then begin case porddef(pfrom^.resulttype)^.typ of s8bit : exprasmlist^.concat(new(pai386,op_reg_reg(A_MOVSX,S_BL,pfrom^.location.register,R_EDI))); u8bit : exprasmlist^.concat(new(pai386,op_reg_reg(A_MOVZX,S_BL,pfrom^.location.register,R_EDI))); s16bit : exprasmlist^.concat(new(pai386,op_reg_reg(A_MOVSX,S_WL,pfrom^.location.register,R_EDI))); u16bit : exprasmlist^.concat(new(pai386,op_reg_reg(A_MOVZX,S_WL,pfrom^.location.register,R_EDI))); u32bit,s32bit: hregister:=pfrom^.location.register end; ungetregister(pfrom^.location.register); end else begin r:=newreference(pfrom^.location.reference); case porddef(pfrom^.resulttype)^.typ of s8bit : exprasmlist^.concat(new(pai386,op_ref_reg(A_MOVSX,S_BL,r,R_EDI))); u8bit : exprasmlist^.concat(new(pai386,op_ref_reg(A_MOVZX,S_BL,r,R_EDI))); s16bit : exprasmlist^.concat(new(pai386,op_ref_reg(A_MOVSX,S_WL,r,R_EDI))); u16bit : exprasmlist^.concat(new(pai386,op_ref_reg(A_MOVZX,S_WL,r,R_EDI))); u32bit,s32bit : exprasmlist^.concat(new(pai386,op_ref_reg(A_MOV,S_L,r,R_EDI))); end; del_reference(pfrom^.location.reference); ungetiftemp(pfrom^.location.reference); end; exprasmlist^.concat(new(pai386,op_reg(A_PUSH,S_L,hregister))); r:=new_reference(R_ESP,0); if porddef(pfrom^.resulttype)^.typ=u32bit then exprasmlist^.concat(new(pai386,op_ref(A_FILD,S_IQ,r))) else exprasmlist^.concat(new(pai386,op_ref(A_FILD,S_IL,r))); { better than an add on all processors } if porddef(pfrom^.resulttype)^.typ=u32bit then exprasmlist^.concat(new(pai386,op_const_reg(A_ADD,S_L,8,R_ESP))) else exprasmlist^.concat(new(pai386,op_reg(A_POP,S_L,R_EDI))); clear_location(pto^.location); pto^.location.loc:=LOC_FPU; end; procedure second_real_to_fix(pto,pfrom : ptree;convtyp : tconverttype); var rreg : tregister; ref : treference; begin { real must be on fpu stack } if (pfrom^.location.loc<>LOC_FPU) then exprasmlist^.concat(new(pai386,op_ref(A_FLD,S_FL,newreference(pfrom^.location.reference)))); push_int($1f3f); push_int(65536); reset_reference(ref); ref.base:=R_ESP; exprasmlist^.concat(new(pai386,op_ref(A_FIMUL,S_IL,newreference(ref)))); ref.offset:=4; exprasmlist^.concat(new(pai386,op_ref(A_FSTCW,S_NO,newreference(ref)))); ref.offset:=6; exprasmlist^.concat(new(pai386,op_ref(A_FLDCW,S_NO,newreference(ref)))); ref.offset:=0; exprasmlist^.concat(new(pai386,op_ref(A_FISTP,S_IL,newreference(ref)))); ref.offset:=4; exprasmlist^.concat(new(pai386,op_ref(A_FLDCW,S_NO,newreference(ref)))); rreg:=getregister32; exprasmlist^.concat(new(pai386,op_reg(A_POP,S_L,rreg))); { better than an add on all processors } exprasmlist^.concat(new(pai386,op_reg(A_POP,S_L,R_EDI))); clear_location(pto^.location); pto^.location.loc:=LOC_REGISTER; pto^.location.register:=rreg; end; procedure second_real_to_real(pto,pfrom : ptree;convtyp : tconverttype); begin case pfrom^.location.loc of LOC_FPU : ; LOC_MEM, LOC_REFERENCE: begin floatload(pfloatdef(pfrom^.resulttype)^.typ, pfrom^.location.reference); { we have to free the reference } del_reference(pfrom^.location.reference); end; end; clear_location(pto^.location); pto^.location.loc:=LOC_FPU; end; procedure second_fix_to_real(pto,pfrom : ptree;convtyp : tconverttype); var popeax,popebx,popecx,popedx : boolean; startreg : tregister; hl : plabel; r : treference; begin if (pfrom^.location.loc=LOC_REGISTER) or (pfrom^.location.loc=LOC_CREGISTER) then begin startreg:=pfrom^.location.register; ungetregister(startreg); popeax:=(startreg<>R_EAX) and not (R_EAX in unused); if popeax then exprasmlist^.concat(new(pai386,op_reg(A_PUSH,S_L,R_EAX))); { mov eax,eax is removed by emit_reg_reg } emit_reg_reg(A_MOV,S_L,startreg,R_EAX); end else begin exprasmlist^.concat(new(pai386,op_ref_reg(A_MOV,S_L,newreference( pfrom^.location.reference),R_EAX))); del_reference(pfrom^.location.reference); startreg:=R_NO; end; popebx:=(startreg<>R_EBX) and not (R_EBX in unused); if popebx then exprasmlist^.concat(new(pai386,op_reg(A_PUSH,S_L,R_EBX))); popecx:=(startreg<>R_ECX) and not (R_ECX in unused); if popecx then exprasmlist^.concat(new(pai386,op_reg(A_PUSH,S_L,R_ECX))); popedx:=(startreg<>R_EDX) and not (R_EDX in unused); if popedx then exprasmlist^.concat(new(pai386,op_reg(A_PUSH,S_L,R_EDX))); exprasmlist^.concat(new(pai386,op_none(A_CDQ,S_NO))); emit_reg_reg(A_XOR,S_L,R_EDX,R_EAX); emit_reg_reg(A_MOV,S_L,R_EAX,R_EBX); emit_reg_reg(A_SUB,S_L,R_EDX,R_EAX); getlabel(hl); emitl(A_JZ,hl); exprasmlist^.concat(new(pai386,op_const_reg(A_RCL,S_L,1,R_EBX))); emit_reg_reg(A_BSR,S_L,R_EAX,R_EDX); exprasmlist^.concat(new(pai386,op_const_reg(A_MOV,S_B,32,R_CL))); emit_reg_reg(A_SUB,S_B,R_DL,R_CL); emit_reg_reg(A_SHL,S_L,R_CL,R_EAX); exprasmlist^.concat(new(pai386,op_const_reg(A_ADD,S_W,1007,R_DX))); exprasmlist^.concat(new(pai386,op_const_reg(A_SHL,S_W,5,R_DX))); exprasmlist^.concat(new(pai386,op_const_reg_reg(A_SHLD,S_W,11,R_DX,R_BX))); exprasmlist^.concat(new(pai386,op_const_reg_reg(A_SHLD,S_W,20,R_EAX,R_EBX))); exprasmlist^.concat(new(pai386,op_const_reg(A_SHL,S_L,20,R_EAX))); emitl(A_LABEL,hl); { better than an add on all processors } exprasmlist^.concat(new(pai386,op_reg(A_PUSH,S_L,R_EBX))); exprasmlist^.concat(new(pai386,op_reg(A_PUSH,S_L,R_EAX))); reset_reference(r); r.base:=R_ESP; exprasmlist^.concat(new(pai386,op_ref(A_FLD,S_FL,newreference(r)))); exprasmlist^.concat(new(pai386,op_const_reg(A_ADD,S_L,8,R_ESP))); if popedx then exprasmlist^.concat(new(pai386,op_reg(A_POP,S_L,R_EDX))); if popecx then exprasmlist^.concat(new(pai386,op_reg(A_POP,S_L,R_ECX))); if popebx then exprasmlist^.concat(new(pai386,op_reg(A_POP,S_L,R_EBX))); if popeax then exprasmlist^.concat(new(pai386,op_reg(A_POP,S_L,R_EAX))); clear_location(pto^.location); pto^.location.loc:=LOC_FPU; end; procedure second_int_to_fix(pto,pfrom : ptree;convtyp : tconverttype); var hregister : tregister; begin if (pfrom^.location.loc=LOC_REGISTER) then hregister:=pfrom^.location.register else if (pfrom^.location.loc=LOC_CREGISTER) then hregister:=getregister32 else begin del_reference(pfrom^.location.reference); hregister:=getregister32; case porddef(pfrom^.resulttype)^.typ of s8bit : exprasmlist^.concat(new(pai386,op_ref_reg(A_MOVSX,S_BL,newreference(pfrom^.location.reference), hregister))); u8bit : exprasmlist^.concat(new(pai386,op_ref_reg(A_MOVZX,S_BL,newreference(pfrom^.location.reference), hregister))); s16bit : exprasmlist^.concat(new(pai386,op_ref_reg(A_MOVSX,S_WL,newreference(pfrom^.location.reference), hregister))); u16bit : exprasmlist^.concat(new(pai386,op_ref_reg(A_MOVZX,S_WL,newreference(pfrom^.location.reference), hregister))); u32bit,s32bit : exprasmlist^.concat(new(pai386,op_ref_reg(A_MOV,S_L,newreference(pfrom^.location.reference), hregister))); {!!!! u32bit } end; end; exprasmlist^.concat(new(pai386,op_const_reg(A_SHL,S_L,16,hregister))); clear_location(pto^.location); pto^.location.loc:=LOC_REGISTER; pto^.location.register:=hregister; end; procedure second_proc_to_procvar(pto,pfrom : ptree;convtyp : tconverttype); begin clear_location(pto^.location); pto^.location.loc:=LOC_REGISTER; pto^.location.register:=getregister32; del_reference(pfrom^.location.reference); exprasmlist^.concat(new(pai386,op_ref_reg(A_LEA,S_L, newreference(pfrom^.location.reference),pto^.location.register))); end; procedure second_bool_to_int(pto,pfrom : ptree;convtyp : tconverttype); var oldtruelabel,oldfalselabel,hlabel : plabel; hregister : tregister; newsize, opsize : topsize; op : tasmop; begin oldtruelabel:=truelabel; oldfalselabel:=falselabel; getlabel(truelabel); getlabel(falselabel); secondpass(pfrom); clear_location(pto^.location); pto^.location.loc:=LOC_REGISTER; del_reference(pfrom^.location.reference); case pfrom^.resulttype^.size of 1 : begin case pto^.resulttype^.size of 1 : opsize:=S_B; 2 : opsize:=S_BW; 4 : opsize:=S_BL; end; end; 2 : begin case pto^.resulttype^.size of 1 : begin if pfrom^.location.loc in [LOC_REGISTER,LOC_CREGISTER] then pfrom^.location.register:=reg16toreg8(pfrom^.location.register); opsize:=S_B; end; 2 : opsize:=S_W; 4 : opsize:=S_WL; end; end; 4 : begin case pto^.resulttype^.size of 1 : begin if pfrom^.location.loc in [LOC_REGISTER,LOC_CREGISTER] then pfrom^.location.register:=reg32toreg8(pfrom^.location.register); opsize:=S_B; end; 2 : begin if pfrom^.location.loc in [LOC_REGISTER,LOC_CREGISTER] then pfrom^.location.register:=reg32toreg16(pfrom^.location.register); opsize:=S_W; end; 4 : opsize:=S_L; end; end; end; if opsize in [S_B,S_W,S_L] then op:=A_MOV else if is_signed(pto^.resulttype) then op:=A_MOVSX else op:=A_MOVZX; hregister:=getregister32; case pto^.resulttype^.size of 1 : begin pto^.location.register:=reg32toreg8(hregister); newsize:=S_B; end; 2 : begin pto^.location.register:=reg32toreg16(hregister); newsize:=S_W; end; 4 : begin pto^.location.register:=hregister; newsize:=S_L; end; else internalerror(10060); end; case pfrom^.location.loc of LOC_MEM, LOC_REFERENCE : exprasmlist^.concat(new(pai386,op_ref_reg(op,opsize, newreference(pfrom^.location.reference),pto^.location.register))); LOC_REGISTER, LOC_CREGISTER : begin { remove things like movb %al,%al } if pfrom^.location.register<>pto^.location.register then exprasmlist^.concat(new(pai386,op_reg_reg(op,opsize, pfrom^.location.register,pto^.location.register))); end; LOC_FLAGS : begin hregister:=reg32toreg8(hregister); exprasmlist^.concat(new(pai386,op_reg(flag_2_set[pfrom^.location.resflags],S_B,hregister))); case pto^.resulttype^.size of 2 : exprasmlist^.concat(new(pai386,op_reg_reg(A_MOVZX,S_BW,hregister,pto^.location.register))); 4 : exprasmlist^.concat(new(pai386,op_reg_reg(A_MOVZX,S_BL,hregister,pto^.location.register))); end; end; LOC_JUMP : begin getlabel(hlabel); emitl(A_LABEL,truelabel); exprasmlist^.concat(new(pai386,op_const_reg(A_MOV,newsize,1,hregister))); emitl(A_JMP,hlabel); emitl(A_LABEL,falselabel); exprasmlist^.concat(new(pai386,op_reg_reg(A_XOR,newsize,hregister,hregister))); emitl(A_LABEL,hlabel); end; else internalerror(10061); end; freelabel(truelabel); freelabel(falselabel); truelabel:=oldtruelabel; falselabel:=oldfalselabel; end; procedure second_int_to_bool(pto,pfrom : ptree;convtyp : tconverttype); var hregister : tregister; begin clear_location(pto^.location); pto^.location.loc:=LOC_REGISTER; del_reference(pfrom^.location.reference); case pfrom^.location.loc of LOC_MEM,LOC_REFERENCE : begin hregister:=getregister32; exprasmlist^.concat(new(pai386,op_ref_reg(A_MOV,S_L, newreference(pfrom^.location.reference),hregister))); end; LOC_REGISTER,LOC_CREGISTER : begin hregister:=pfrom^.location.register; end; else internalerror(10062); end; exprasmlist^.concat(new(pai386,op_reg_reg(A_OR,S_L,hregister,hregister))); hregister:=reg32toreg8(hregister); exprasmlist^.concat(new(pai386,op_reg(flag_2_set[pfrom^.location.resflags],S_B,hregister))); case pto^.resulttype^.size of 1 : pto^.location.register:=hregister; 2 : begin pto^.location.register:=reg8toreg16(hregister); exprasmlist^.concat(new(pai386,op_reg_reg(A_MOVZX,S_BW,hregister,pto^.location.register))); end; 4 : begin pto^.location.register:=reg8toreg32(hregister); exprasmlist^.concat(new(pai386,op_reg_reg(A_MOVZX,S_BL,hregister,pto^.location.register))); end; else internalerror(10064); end; end; procedure second_load_smallset(pto,pfrom : ptree;convtyp : tconverttype); var href : treference; pushedregs : tpushed; begin href.symbol:=nil; pushusedregisters(pushedregs,$ff); gettempofsizereference(32,href); emitpushreferenceaddr(exprasmlist,pfrom^.location.reference); emitpushreferenceaddr(exprasmlist,href); emitcall('FPC_SET_LOAD_SMALL',true); maybe_loadesi; popusedregisters(pushedregs); clear_location(pto^.location); pto^.location.loc:=LOC_MEM; pto^.location.reference:=href; end; procedure second_ansistring_to_pchar(pto,pfrom : ptree;convtyp : tconverttype); var l1,l2 : plabel; hr : preference; begin clear_location(pto^.location); pto^.location.loc:=LOC_REGISTER; getlabel(l1); getlabel(l2); case pfrom^.location.loc of LOC_CREGISTER,LOC_REGISTER: exprasmlist^.concat(new(pai386,op_const_reg(A_CMP,S_L,0, pfrom^.location.register))); LOC_MEM,LOC_REFERENCE: begin exprasmlist^.concat(new(pai386,op_const_ref(A_CMP,S_L,0, newreference(pfrom^.location.reference)))); del_reference(pfrom^.location.reference); pto^.location.register:=getregister32; end; end; emitl(A_JZ,l1); if pfrom^.location.loc in [LOC_MEM,LOC_REFERENCE] then exprasmlist^.concat(new(pai386,op_ref_reg(A_MOV,S_L,newreference( pfrom^.location.reference), pto^.location.register))); emitl(A_JMP,l2); emitl(A_LABEL,l1); new(hr); reset_reference(hr^); hr^.symbol:=stringdup('FPC_EMPTYCHAR'); exprasmlist^.concat(new(pai386,op_ref_reg(A_LEA,S_L,hr, pto^.location.register))); emitl(A_LABEL,l2); end; procedure second_pchar_to_string(pto,pfrom : ptree;convtyp : tconverttype); var pushed : tpushed; begin case pstringdef(pto^.resulttype)^.string_typ of st_shortstring: begin pushusedregisters(pushed,$ff); stringdispose(pto^.location.reference.symbol); gettempofsizereference(pto^.resulttype^.size,pto^.location.reference); case pfrom^.location.loc of LOC_REGISTER,LOC_CREGISTER: begin exprasmlist^.concat(new(pai386,op_reg(A_PUSH,S_L,pfrom^.location.register))); ungetregister32(pfrom^.location.register); end; LOC_REFERENCE,LOC_MEM: begin emit_push_mem(pfrom^.location.reference); del_reference(pfrom^.location.reference); end; end; emitpushreferenceaddr(exprasmlist,pto^.location.reference); emitcall('FPC_PCHAR_TO_SHORTSTR',true); maybe_loadesi; popusedregisters(pushed); end; st_ansistring: begin stringdispose(pto^.location.reference.symbol); gettempofsizereference(pto^.resulttype^.size,pto^.location.reference); case pfrom^.location.loc of LOC_REGISTER,LOC_CREGISTER: begin ungetregister32(pfrom^.location.register); pushusedregisters(pushed,$ff); exprasmlist^.concat(new(pai386,op_reg(A_PUSH,S_L,pfrom^.location.register))); end; LOC_REFERENCE,LOC_MEM: begin del_reference(pfrom^.location.reference); pushusedregisters(pushed,$ff); emit_push_mem(pfrom^.location.reference); end; end; emitpushreferenceaddr(exprasmlist,pto^.location.reference); emitcall('FPC_PCHAR_TO_ANSISTR',true); maybe_loadesi; popusedregisters(pushed); end; else begin clear_location(pto^.location); pto^.location.loc:=LOC_REGISTER; internalerror(12121); end; end; end; procedure second_nothing(pto,pfrom : ptree;convtyp : tconverttype); begin end; {**************************************************************************** SecondTypeConv ****************************************************************************} procedure secondtypeconv(var p : ptree); const secondconvert : array[tconverttype] of tsecondconvproc = ( {$ifndef OLDCNV} second_nothing, {equal} second_nothing, {not_possible} second_string_to_string, second_char_to_string, second_pchar_to_string, second_nothing, {cchar_to_pchar} second_cstring_to_pchar, second_ansistring_to_pchar, second_string_to_chararray, second_chararray_to_string, second_array_to_pointer, second_pointer_to_array, second_int_to_int, second_bool_to_int, second_int_to_bool, second_real_to_real, second_int_to_real, second_int_to_fix, second_real_to_fix, second_fix_to_real, second_proc_to_procvar, second_nothing, {arrayconstructor_to_set} second_load_smallset ); {$else} second_nothing,second_nothing, second_bigger,second_only_rangecheck, second_bigger,second_bigger,second_bigger, second_smaller,second_smaller, second_smaller,second_string_to_string, second_cstring_to_pchar,second_string_to_chararray, second_array_to_pointer,second_pointer_to_array, second_char_to_string,second_bigger, second_bigger,second_bigger, second_smaller,second_smaller, second_smaller,second_smaller, second_bigger,second_smaller, second_only_rangecheck,second_bigger, second_bigger,second_bigger, second_bigger,second_only_rangecheck, second_smaller,second_smaller, second_smaller,second_smaller, second_bool_to_int,second_int_to_bool, second_int_to_real,second_real_to_fix, second_fix_to_real,second_int_to_fix,second_real_to_real, second_chararray_to_string, second_proc_to_procvar, { is constant char to pchar, is done by firstpass } second_nothing, second_load_smallset, second_ansistring_to_pchar, second_pchar_to_string, second_nothing); {$endif} begin { this isn't good coding, I think tc_bool_2_int, shouldn't be } { type conversion (FK) } { this is necessary, because second_bool_2_int, have to change } { true- and false label before calling secondpass } if p^.convtyp<>tc_bool_2_int then begin secondpass(p^.left); set_location(p^.location,p^.left^.location); if codegenerror then exit; end; {the second argument only is for maybe_range_checking !} secondconvert[p^.convtyp](p,p^.left,p^.convtyp) end; {***************************************************************************** SecondIs *****************************************************************************} procedure secondis(var p : ptree); var pushed : tpushed; begin { save all used registers } pushusedregisters(pushed,$ff); secondpass(p^.left); clear_location(p^.location); p^.location.loc:=LOC_FLAGS; p^.location.resflags:=F_NE; { push instance to check: } case p^.left^.location.loc of LOC_REGISTER,LOC_CREGISTER: begin exprasmlist^.concat(new(pai386,op_reg(A_PUSH, S_L,p^.left^.location.register))); ungetregister32(p^.left^.location.register); end; LOC_MEM,LOC_REFERENCE: begin exprasmlist^.concat(new(pai386,op_ref(A_PUSH, S_L,newreference(p^.left^.location.reference)))); del_reference(p^.left^.location.reference); end; else internalerror(100); end; { generate type checking } secondpass(p^.right); case p^.right^.location.loc of LOC_REGISTER,LOC_CREGISTER: begin exprasmlist^.concat(new(pai386,op_reg(A_PUSH, S_L,p^.right^.location.register))); ungetregister32(p^.right^.location.register); end; LOC_MEM,LOC_REFERENCE: begin exprasmlist^.concat(new(pai386,op_ref(A_PUSH, S_L,newreference(p^.right^.location.reference)))); del_reference(p^.right^.location.reference); end; else internalerror(100); end; emitcall('FPC_DO_IS',true); exprasmlist^.concat(new(pai386,op_reg_reg(A_OR,S_B,R_AL,R_AL))); popusedregisters(pushed); end; {***************************************************************************** SecondAs *****************************************************************************} procedure secondas(var p : ptree); var pushed : tpushed; begin secondpass(p^.left); { save all used registers } pushusedregisters(pushed,$ff); { push instance to check: } case p^.left^.location.loc of LOC_REGISTER,LOC_CREGISTER: exprasmlist^.concat(new(pai386,op_reg(A_PUSH, S_L,p^.left^.location.register))); LOC_MEM,LOC_REFERENCE: exprasmlist^.concat(new(pai386,op_ref(A_PUSH, S_L,newreference(p^.left^.location.reference)))); else internalerror(100); end; { we doesn't modifiy the left side, we check only the type } set_location(p^.location,p^.left^.location); { generate type checking } secondpass(p^.right); case p^.right^.location.loc of LOC_REGISTER,LOC_CREGISTER: begin exprasmlist^.concat(new(pai386,op_reg(A_PUSH, S_L,p^.right^.location.register))); ungetregister32(p^.right^.location.register); end; LOC_MEM,LOC_REFERENCE: begin exprasmlist^.concat(new(pai386,op_ref(A_PUSH, S_L,newreference(p^.right^.location.reference)))); del_reference(p^.right^.location.reference); end; else internalerror(100); end; emitcall('FPC_DO_AS',true); { restore register, this restores automatically the } { result } popusedregisters(pushed); end; end. { $Log$ Revision 1.38 1998-11-29 12:40:19 peter * newcnv -> not oldcnv Revision 1.37 1998/11/26 21:33:06 peter * rangecheck updates Revision 1.36 1998/11/26 14:39:11 peter * ansistring -> pchar fixed * ansistring constants fixed * ansistring constants are now written once Revision 1.35 1998/11/26 13:10:39 peter * new int - int conversion -dNEWCNV * some function renamings Revision 1.34 1998/11/18 15:44:08 peter * VALUEPARA for tp7 compatible value parameters Revision 1.33 1998/11/17 00:36:39 peter * more ansistring fixes Revision 1.32 1998/11/16 15:35:38 peter * rename laod/copystring -> load/copyshortstring * fixed int-bool cnv bug + char-ansistring conversion Revision 1.31 1998/11/05 12:02:30 peter * released useansistring * removed -Sv, its now available in fpc modes Revision 1.30 1998/10/27 11:12:45 peter * fixed char_to_string which did not set the .loc Revision 1.29 1998/10/26 15:18:41 peter * fixed fldcw,fstcw for as 2.9.1 Revision 1.28 1998/10/08 17:17:11 pierre * current_module old scanner tagged as invalid if unit is recompiled + added ppheap for better info on tracegetmem of heaptrc (adds line column and file index) * several memory leaks removed ith help of heaptrc !! Revision 1.27 1998/10/06 17:16:40 pierre * some memory leaks fixed (thanks to Peter for heaptrc !) Revision 1.26 1998/10/02 07:20:35 florian * range checking in units doesn't work if the units are smartlinked, fixed Revision 1.25 1998/09/30 12:14:24 peter * fixed boolean(longbool) conversion Revision 1.24 1998/09/27 10:16:22 florian * type casts pchar<->ansistring fixed * ansistring[..] calls does now an unique call Revision 1.23 1998/09/23 12:03:51 peter * overloading fix for array of const Revision 1.22 1998/09/22 15:34:09 peter + pchar -> string conversion Revision 1.21 1998/09/20 17:46:47 florian * some things regarding ansistrings fixed Revision 1.20 1998/09/17 09:42:12 peter + pass_2 for cg386 * Message() -> CGMessage() for pass_1/pass_2 Revision 1.19 1998/09/14 10:43:46 peter * all internal RTL functions start with FPC_ Revision 1.18 1998/09/11 12:29:40 pierre * removed explicit range_checking as it is buggy Revision 1.17.2.1 1998/09/11 12:08:54 pierre * removed explicit range_check was buggy Revision 1.17 1998/09/04 08:41:38 peter * updated some error CGMessages Revision 1.16 1998/09/03 17:39:03 florian + better code for type conversation longint/dword to real type Revision 1.15 1998/09/03 16:24:50 florian * bug of type conversation from dword to real fixed * bug fix of Jonas applied Revision 1.14 1998/08/28 12:51:39 florian + ansistring to pchar type cast fixed Revision 1.13 1998/08/28 10:56:56 peter * removed warnings Revision 1.12 1998/08/14 18:18:38 peter + dynamic set contruction * smallsets are now working (always longint size) Revision 1.11 1998/08/10 23:59:59 peter * fixed dup log Revision 1.10 1998/08/10 14:49:47 peter + localswitches, moduleswitches, globalswitches splitting Revision 1.9 1998/08/05 16:00:09 florian * some fixes for ansi strings Revision 1.8 1998/07/18 22:54:24 florian * some ansi/wide/longstring support fixed: o parameter passing o returning as result from functions Revision 1.7 1998/06/12 13:10:34 peter * small internalerror nr change Revision 1.6 1998/06/12 10:43:12 michael Fixed ansistrings : is_ansistring not found Revision 1.5 1998/06/08 13:13:30 pierre + temporary variables now in temp_gen.pas unit because it is processor independent * mppc68k.bat modified to undefine i386 and support_mmx (which are defaults for i386) Revision 1.4 1998/06/05 17:44:10 peter * splitted cgi386 Revision 1.3 1998/06/03 22:48:50 peter + wordbool,longbool * rename bis,von -> high,low * moved some systemunit loading/creating to psystem.pas Revision 1.2 1998/06/02 10:52:10 peter * fixed second_bool_to_int with bool8bit return Revision 1.1 1998/06/01 16:50:18 peter + boolean -> ord conversion * fixed ord -> boolean conversion }