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308 lines
13 KiB
ObjectPascal
308 lines
13 KiB
ObjectPascal
{
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Copyright (c) 1998-2002 by Florian Klaempfl
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Generate m68k assembler for type converting nodes
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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****************************************************************************
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}
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unit n68kcnv;
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{$i fpcdefs.inc}
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interface
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uses
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node,ncnv,ncgcnv,defcmp;
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type
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tm68ktypeconvnode = class(tcgtypeconvnode)
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protected
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function first_int_to_real: tnode; override;
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procedure second_int_to_real;override;
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procedure second_int_to_bool;override;
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end;
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implementation
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uses
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verbose,globals,systems,
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symconst,symdef,aasmbase,aasmtai,aasmdata,
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defutil,
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cgbase,pass_1,pass_2,procinfo,
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ncon,ncal,
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ncgutil,
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cpubase,cpuinfo,aasmcpu,
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rgobj,tgobj,cgobj,hlcgobj,cgutils,globtype,cgcpu;
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{*****************************************************************************
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FirstTypeConv
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*****************************************************************************}
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function tm68ktypeconvnode.first_int_to_real: tnode;
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var
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fname: string[32];
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begin
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{ In case we are in emulation mode, we must
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always call the helpers
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}
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if (cs_fp_emulation in current_settings.moduleswitches)
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or (current_settings.fputype=fpu_soft) then
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begin
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result := inherited first_int_to_real;
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exit;
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end
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else
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{ converting a 64bit integer to a float requires a helper }
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if is_64bitint(left.resultdef) then
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begin
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if is_signed(left.resultdef) then
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fname := 'fpc_int64_to_double'
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else
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fname := 'fpc_qword_to_double';
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result := ccallnode.createintern(fname,ccallparanode.create(
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left,nil));
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left:=nil;
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firstpass(result);
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exit;
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end
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else
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{ other integers are supposed to be 32 bit }
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begin
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if is_signed(left.resultdef) then
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inserttypeconv(left,s32inttype)
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else
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{ the fpu always considers 32-bit values as signed
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therefore we need to call the helper in case of
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a cardinal value.
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}
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begin
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fname := 'fpc_longword_to_double';
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result := ccallnode.createintern(fname,ccallparanode.create(
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left,nil));
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left:=nil;
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firstpass(result);
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exit;
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end;
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firstpass(left);
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end;
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result := nil;
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location.loc:=LOC_FPUREGISTER;
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end;
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{*****************************************************************************
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SecondTypeConv
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*****************************************************************************}
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procedure tm68ktypeconvnode.second_int_to_real;
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var
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tempconst: trealconstnode;
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ref: treference;
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valuereg, tempreg, leftreg, tmpfpureg: tregister;
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signed : boolean;
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scratch_used : boolean;
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opsize : tcgsize;
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begin
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scratch_used := false;
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location_reset(location,LOC_FPUREGISTER,def_cgsize(resultdef));
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signed := is_signed(left.resultdef);
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opsize := def_cgsize(left.resultdef);
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{ has to be handled by a helper }
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if is_64bitint(left.resultdef) then
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internalerror(200110011);
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{ has to be handled by a helper }
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if not signed then
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internalerror(2002081404);
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location.register:=cg.getfpuregister(current_asmdata.CurrAsmList,opsize);
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if not(left.location.loc in [LOC_REGISTER,LOC_CREGISTER,LOC_REFERENCE,LOC_CREFERENCE]) then
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hlcg.location_force_reg(current_asmdata.CurrAsmList,left.location,left.resultdef,osuinttype,false);
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case left.location.loc of
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LOC_REGISTER, LOC_CREGISTER:
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begin
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leftreg := left.location.register;
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current_asmdata.CurrAsmList.concat(taicpu.op_reg_reg(A_FMOVE,TCGSize2OpSize[opsize],leftreg,
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location.register));
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end;
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LOC_REFERENCE,LOC_CREFERENCE:
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begin
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current_asmdata.CurrAsmList.concat(taicpu.op_ref_reg(A_FMOVE,TCGSize2OpSize[opsize],
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left.location.reference,location.register));
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end
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else
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internalerror(200110012);
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end;
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end;
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procedure tm68ktypeconvnode.second_int_to_bool;
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var
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hreg1,
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hreg2 : tregister;
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reg64 : tregister64;
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resflags : tresflags;
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opsize : tcgsize;
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newsize : tcgsize;
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hlabel,
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oldTrueLabel,
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oldFalseLabel : tasmlabel;
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tmpreference : treference;
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begin
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oldTrueLabel:=current_procinfo.CurrTrueLabel;
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oldFalseLabel:=current_procinfo.CurrFalseLabel;
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current_asmdata.getjumplabel(current_procinfo.CurrTrueLabel);
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current_asmdata.getjumplabel(current_procinfo.CurrFalseLabel);
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secondpass(left);
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{ Explicit typecasts from any ordinal type to a boolean type }
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{ must not change the ordinal value }
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if (nf_explicit in flags) and
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not(left.location.loc in [LOC_FLAGS,LOC_JUMP]) then
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begin
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location_copy(location,left.location);
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newsize:=def_cgsize(resultdef);
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{ change of size? change sign only if location is LOC_(C)REGISTER? Then we have to sign/zero-extend }
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if (tcgsize2size[newsize]<>tcgsize2size[left.location.size]) or
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((newsize<>left.location.size) and (location.loc in [LOC_REGISTER,LOC_CREGISTER])) then
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hlcg.location_force_reg(current_asmdata.CurrAsmList,location,left.resultdef,resultdef,true)
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else
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location.size:=newsize;
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current_procinfo.CurrTrueLabel:=oldTrueLabel;
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current_procinfo.CurrFalseLabel:=oldFalseLabel;
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exit;
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end;
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resflags:=F_NE;
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newsize:=def_cgsize(resultdef);
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opsize := def_cgsize(left.resultdef);
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case left.location.loc of
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LOC_CREFERENCE,LOC_REFERENCE :
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begin
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if opsize in [OS_64,OS_S64] then
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begin
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reg64.reghi:=cg.getintregister(current_asmdata.CurrAsmList,OS_32);
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reg64.reglo:=cg.getintregister(current_asmdata.CurrAsmList,OS_32);
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cg64.a_load64_loc_reg(current_asmdata.CurrAsmList,left.location,reg64);
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current_asmdata.CurrAsmList.concat(taicpu.op_reg_reg(A_OR,S_L,reg64.reghi,reg64.reglo));
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current_asmdata.CurrAsmList.concat(taicpu.op_reg(A_TST,S_L,reg64.reglo));
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end
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else
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begin
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{ can we optimize it, or do we need to fix the ref. ? }
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if isvalidrefoffset(left.location.reference) then
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begin
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{ Coldfire cannot handle tst.l 123(dX) }
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if (current_settings.cputype in (cpu_coldfire + [cpu_mc68000])) and
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isintregister(left.location.reference.base) then
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begin
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tmpreference:=left.location.reference;
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hreg2:=cg.getaddressregister(current_asmdata.CurrAsmList);
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tmpreference.base:=hreg2;
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current_asmdata.CurrAsmList.concat(taicpu.op_reg_reg(A_MOVE,S_L,left.location.reference.base,hreg2));
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current_asmdata.CurrAsmList.concat(taicpu.op_ref(A_TST,TCGSize2OpSize[opsize],tmpreference));
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end
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else
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current_asmdata.CurrAsmList.concat(taicpu.op_ref(A_TST,TCGSize2OpSize[opsize],left.location.reference));
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end
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else
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begin
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hreg2:=cg.getintregister(current_asmdata.CurrAsmList,opsize);
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cg.a_load_ref_reg(current_asmdata.CurrAsmList,opsize,opsize,
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left.location.reference,hreg2);
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current_asmdata.CurrAsmList.concat(taicpu.op_reg(A_TST,TCGSize2OpSize[opsize],hreg2));
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end;
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end;
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end;
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LOC_REGISTER,LOC_CREGISTER :
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begin
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if opsize in [OS_64,OS_S64] then
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begin
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hreg2:=cg.getintregister(current_asmdata.CurrAsmList,opsize);
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current_asmdata.CurrAsmList.concat(taicpu.op_reg_reg(A_MOVE,S_L,left.location.register64.reglo,hreg2));
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current_asmdata.CurrAsmList.concat(taicpu.op_reg_reg(A_OR,S_L,left.location.register64.reghi,hreg2));
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current_asmdata.CurrAsmList.concat(taicpu.op_reg(A_TST,S_L,hreg2));
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end
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else
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begin
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hreg2:=left.location.register;
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current_asmdata.CurrAsmList.concat(taicpu.op_reg(A_TST,TCGSize2OpSize[opsize],hreg2));
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end;
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end;
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LOC_FLAGS :
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begin
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resflags:=left.location.resflags;
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end;
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LOC_JUMP :
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begin
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{ for now blindly copied from nx86cnv }
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location_reset(location,LOC_REGISTER,newsize);
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location.register:=cg.getintregister(current_asmdata.CurrAsmList,location.size);
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current_asmdata.getjumplabel(hlabel);
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cg.a_label(current_asmdata.CurrAsmList,current_procinfo.CurrTrueLabel);
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if not(is_cbool(resultdef)) then
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cg.a_load_const_reg(current_asmdata.CurrAsmList,location.size,1,location.register)
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else
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cg.a_load_const_reg(current_asmdata.CurrAsmList,location.size,-1,location.register);
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cg.a_jmp_always(current_asmdata.CurrAsmList,hlabel);
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cg.a_label(current_asmdata.CurrAsmList,current_procinfo.CurrFalseLabel);
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cg.a_load_const_reg(current_asmdata.CurrAsmList,location.size,0,location.register);
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cg.a_label(current_asmdata.CurrAsmList,hlabel);
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end;
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else
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internalerror(200512182);
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end;
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if left.location.loc<>LOC_JUMP then
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begin
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location_reset(location,LOC_REGISTER,newsize);
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if newsize in [OS_64,OS_S64] then
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begin
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hreg2:=cg.getintregister(current_asmdata.CurrAsmList,OS_32);
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cg.g_flags2reg(current_asmdata.CurrAsmList,OS_32,resflags,hreg2);
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if (is_cbool(resultdef)) then
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cg.a_op_reg_reg(current_asmdata.CurrAsmList,OP_NEG,OS_32,hreg2,hreg2);
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location.register64.reglo:=hreg2;
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location.register64.reghi:=cg.getintregister(current_asmdata.CurrAsmList,OS_32);
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if (is_cbool(resultdef)) then
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{ reglo is either 0 or -1 -> reghi has to become the same }
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cg.a_load_reg_reg(current_asmdata.CurrAsmList,OS_32,OS_32,location.register64.reglo,location.register64.reghi)
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else
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{ unsigned }
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cg.a_load_const_reg(current_asmdata.CurrAsmList,OS_32,0,location.register64.reghi);
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end
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else
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begin
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location.register:=cg.getintregister(current_asmdata.CurrAsmList,newsize);
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cg.g_flags2reg(current_asmdata.CurrAsmList,newsize,resflags,location.register);
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if (is_cbool(resultdef)) then
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cg.a_op_reg_reg(current_asmdata.CurrAsmList,OP_NEG,newsize,location.register,location.register);
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end
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end;
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current_procinfo.CurrTrueLabel:=oldTrueLabel;
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current_procinfo.CurrFalseLabel:=oldFalseLabel;
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end;
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begin
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ctypeconvnode:=tm68ktypeconvnode;
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end.
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