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299 lines
11 KiB
ObjectPascal
299 lines
11 KiB
ObjectPascal
{
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$Id$
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Copyright (c) 1998-2002 by Florian Klaempfl
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Generate for x86-64 and i386 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 nx86cnv;
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{$i fpcdefs.inc}
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interface
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uses
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node,ncgcnv,defutil,defcmp;
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type
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tx86typeconvnode = class(tcgtypeconvnode)
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protected
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function first_real_to_real : tnode;override;
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{ procedure second_int_to_int;override; }
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{ procedure second_string_to_string;override; }
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{ procedure second_cstring_to_pchar;override; }
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{ procedure second_string_to_chararray;override; }
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{ procedure second_array_to_pointer;override; }
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{ procedure second_pointer_to_array;override; }
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{ procedure second_chararray_to_string;override; }
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{ procedure second_char_to_string;override; }
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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_real_to_real;override; }
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{ procedure second_cord_to_pointer;override; }
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{ procedure second_proc_to_procvar;override; }
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{ procedure second_bool_to_int;override; }
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procedure second_int_to_bool;override;
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{ procedure second_load_smallset;override; }
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{ procedure second_ansistring_to_pchar;override; }
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{ procedure second_pchar_to_string;override; }
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{ procedure second_class_to_intf;override; }
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{ procedure second_char_to_char;override; }
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end;
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implementation
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uses
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verbose,systems,globals,globtype,
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aasmbase,aasmtai,aasmcpu,
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symconst,symdef,
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cgbase,cga,pass_2,
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ncon,ncal,ncnv,
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cpubase,
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cgutils,cgobj,cgx86,ncgutil,
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tgobj;
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function tx86typeconvnode.first_real_to_real : tnode;
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begin
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first_real_to_real:=nil;
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{ comp isn't a floating type }
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if (tfloatdef(resulttype.def).typ=s64comp) and
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(tfloatdef(left.resulttype.def).typ<>s64comp) and
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not (nf_explicit in flags) then
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CGMessage(type_w_convert_real_2_comp);
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if use_sse(resulttype.def) then
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begin
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if registersmm<1 then
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registersmm:=1;
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expectloc:=LOC_MMREGISTER;
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end
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else
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begin
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if registersfpu<1 then
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registersfpu:=1;
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expectloc:=LOC_FPUREGISTER;
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end;
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end;
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procedure tx86typeconvnode.second_int_to_bool;
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var
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hregister : tregister;
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{$ifndef cpu64bit}
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href : treference;
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{$endif cpu64bit}
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resflags : tresflags;
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hlabel,oldtruelabel,oldfalselabel : tasmlabel;
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begin
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oldtruelabel:=truelabel;
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oldfalselabel:=falselabel;
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objectlibrary.getlabel(truelabel);
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objectlibrary.getlabel(falselabel);
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secondpass(left);
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if codegenerror then
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exit;
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{ byte(boolean) or word(wordbool) or longint(longbool) must }
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{ be accepted for var parameters }
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if (nf_explicit in flags) and
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(left.resulttype.def.size=resulttype.def.size) and
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(left.location.loc in [LOC_REFERENCE,LOC_CREFERENCE,LOC_CREGISTER]) then
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begin
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location_copy(location,left.location);
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truelabel:=oldtruelabel;
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falselabel:=oldfalselabel;
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exit;
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end;
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{ Load left node into flag F_NE/F_E }
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resflags:=F_NE;
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case left.location.loc of
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LOC_CREFERENCE,
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LOC_REFERENCE :
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begin
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{$ifndef cpu64bit}
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if left.location.size in [OS_64,OS_S64] then
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begin
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hregister:=cg.getintregister(exprasmlist,OS_INT);
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cg.a_load_ref_reg(exprasmlist,OS_32,OS_32,left.location.reference,hregister);
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href:=left.location.reference;
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inc(href.offset,4);
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cg.a_op_ref_reg(exprasmlist,OP_OR,OS_32,href,hregister);
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end
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else
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{$endif cpu64bit}
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begin
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location_force_reg(exprasmlist,left.location,left.location.size,true);
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cg.a_op_reg_reg(exprasmlist,OP_OR,left.location.size,left.location.register,left.location.register);
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end;
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end;
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LOC_FLAGS :
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begin
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resflags:=left.location.resflags;
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end;
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LOC_REGISTER,LOC_CREGISTER :
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begin
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{$ifndef cpu64bit}
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if left.location.size in [OS_64,OS_S64] then
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begin
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hregister:=cg.getintregister(exprasmlist,OS_32);
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cg.a_load_reg_reg(exprasmlist,OS_32,OS_32,left.location.register64.reglo,hregister);
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cg.a_op_reg_reg(exprasmlist,OP_OR,OS_32,left.location.register64.reghi,hregister);
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end
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else
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{$endif cpu64bit}
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cg.a_op_reg_reg(exprasmlist,OP_OR,left.location.size,left.location.register,left.location.register);
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end;
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LOC_JUMP :
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begin
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hregister:=cg.getintregister(exprasmlist,OS_INT);
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objectlibrary.getlabel(hlabel);
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cg.a_label(exprasmlist,truelabel);
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cg.a_load_const_reg(exprasmlist,OS_INT,1,hregister);
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cg.a_jmp_always(exprasmlist,hlabel);
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cg.a_label(exprasmlist,falselabel);
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cg.a_load_const_reg(exprasmlist,OS_INT,0,hregister);
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cg.a_label(exprasmlist,hlabel);
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cg.a_op_reg_reg(exprasmlist,OP_OR,OS_INT,hregister,hregister);
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end;
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else
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internalerror(10062);
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end;
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{ load flags to register }
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location_reset(location,LOC_REGISTER,def_cgsize(resulttype.def));
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location.register:=cg.getintregister(exprasmlist,location.size);
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cg.g_flags2reg(exprasmlist,location.size,resflags,location.register);
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truelabel:=oldtruelabel;
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falselabel:=oldfalselabel;
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end;
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function tx86typeconvnode.first_int_to_real : tnode;
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begin
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first_int_to_real:=nil;
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if registersfpu<1 then
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registersfpu:=1;
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expectloc:=LOC_FPUREGISTER;
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end;
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procedure tx86typeconvnode.second_int_to_real;
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var
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href : treference;
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hregister : tregister;
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l1,l2 : tasmlabel;
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signtested : boolean;
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begin
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{
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if use_sse(resulttype.def) then
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begin
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end
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else
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}
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begin
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location_reset(location,LOC_FPUREGISTER,def_cgsize(resulttype.def));
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if (left.location.loc=LOC_REGISTER) and (torddef(left.resulttype.def).typ=u64bit) then
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begin
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{$ifdef cpu64bit}
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emit_const_reg(A_BT,S_Q,63,left.location.register);
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{$else cpu64bit}
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emit_const_reg(A_BT,S_L,31,left.location.register64.reghi);
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{$endif cpu64bit}
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signtested:=true;
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end
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else
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signtested:=false;
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{ We need to load from a reference }
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location_force_mem(exprasmlist,left.location);
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{ For u32bit we need to load it as comp and need to
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make it 64bits }
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if (torddef(left.resulttype.def).typ=u32bit) then
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begin
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tg.GetTemp(exprasmlist,8,tt_normal,href);
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location_freetemp(exprasmlist,left.location);
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cg.a_load_ref_ref(exprasmlist,left.location.size,OS_32,left.location.reference,href);
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inc(href.offset,4);
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cg.a_load_const_ref(exprasmlist,OS_32,0,href);
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dec(href.offset,4);
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left.location.reference:=href;
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end;
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{ Load from reference to fpu reg }
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case torddef(left.resulttype.def).typ of
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u32bit,
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scurrency,
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s64bit:
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exprasmlist.concat(taicpu.op_ref(A_FILD,S_IQ,left.location.reference));
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u64bit:
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begin
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{ unsigned 64 bit ints are harder to handle:
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we load bits 0..62 and then check bit 63:
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if it is 1 then we add $80000000 000000000
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as double }
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objectlibrary.getdatalabel(l1);
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objectlibrary.getlabel(l2);
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if not(signtested) then
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begin
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inc(left.location.reference.offset,4);
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emit_const_ref(A_BT,S_L,31,left.location.reference);
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dec(left.location.reference.offset,4);
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end;
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exprasmlist.concat(taicpu.op_ref(A_FILD,S_IQ,left.location.reference));
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cg.a_jmp_flags(exprasmlist,F_NC,l2);
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Consts.concat(Tai_label.Create(l1));
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{ I got this constant from a test program (FK) }
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Consts.concat(Tai_const.Create_32bit(0));
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Consts.concat(Tai_const.Create_32bit(longint ($80000000)));
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Consts.concat(Tai_const.Create_32bit($0000403f));
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reference_reset_symbol(href,l1,0);
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exprasmList.concat(Taicpu.Op_ref(A_FLD,S_FX,href));
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exprasmList.concat(Taicpu.Op_reg_reg(A_FADDP,S_NO,NR_ST,NR_ST1));
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cg.a_label(exprasmlist,l2);
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end
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else
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begin
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if left.resulttype.def.size<4 then
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begin
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tg.GetTemp(exprasmlist,4,tt_normal,href);
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location_freetemp(exprasmlist,left.location);
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cg.a_load_ref_ref(exprasmlist,left.location.size,OS_32,left.location.reference,href);
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left.location.reference:=href;
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end;
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exprasmlist.concat(taicpu.op_ref(A_FILD,S_IL,left.location.reference));
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end;
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end;
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location_freetemp(exprasmlist,left.location);
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tcgx86(cg).inc_fpu_stack;
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location.register:=NR_ST;
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end;
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end;
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end.
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{
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$Log$
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Revision 1.18 2005-02-14 17:13:10 peter
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* truncate log
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}
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