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481 lines
17 KiB
ObjectPascal
481 lines
17 KiB
ObjectPascal
{
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$Id$
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Copyright (c) 1998-2002 by Florian Klaempfl
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Generate PowerPC 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 nppccnv;
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{$i fpcdefs.inc}
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interface
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uses
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node,ncnv,ncgcnv,defbase;
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type
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tppctypeconvnode = class(tcgtypeconvnode)
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protected
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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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function first_int_to_real: tnode; 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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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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procedure pass_2;override;
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procedure second_call_helper(c : tconverttype); 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,
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cgbase,pass_1,pass_2,
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ncon,ncal,
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ncgutil,
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cpubase,aasmcpu,
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rgobj,tgobj,cgobj,cginfo;
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{*****************************************************************************
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FirstTypeConv
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*****************************************************************************}
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function tppctypeconvnode.first_int_to_real: tnode;
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var
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fname: string[19];
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begin
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{ converting a 64bit integer to a float requires a helper }
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if is_64bitint(left.resulttype.def) then
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begin
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if is_signed(left.resulttype.def) 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.resulttype.def) then
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inserttypeconv(left,s32bittype)
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else
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inserttypeconv(left,u32bittype);
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firstpass(left);
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end;
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result := inherited first_int_to_real;
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end;
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{*****************************************************************************
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SecondTypeConv
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*****************************************************************************}
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procedure tppctypeconvnode.second_int_to_int;
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var
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newsize : tcgsize;
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size, leftsize : cardinal;
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begin
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newsize:=def_cgsize(resulttype.def);
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{ insert range check if not explicit conversion }
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if not(nf_explizit in flags) then
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cg.g_rangecheck(exprasmlist,left,resulttype.def);
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{ is the result size smaller ? }
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size := resulttype.def.size;
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leftsize := left.resulttype.def.size;
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if (size < leftsize) or
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(((newsize in [OS_64,OS_S64]) or
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(left.location.loc <> LOC_REGISTER)) and
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(size > leftsize)) then
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begin
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{ reuse the left location by default }
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location_copy(location,left.location);
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location_force_reg(exprasmlist,location,newsize,false);
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end
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else
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begin
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{ no special loading is required, reuse current location }
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location_copy(location,left.location);
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location.size:=newsize;
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end;
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end;
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procedure tppctypeconvnode.second_int_to_real;
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type
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tdummyarray = packed array[0..7] of byte;
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{$ifdef VER1_0}
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var
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dummy1, dummy2: int64;
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{$else VER1_0}
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const
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dummy1: int64 = $4330000080000000;
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dummy2: int64 = $4330000000000000;
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{$endif VER1_0}
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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, valuereg_is_scratch: boolean;
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begin
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{$ifdef VER1_0}
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{ the "and" is because 1.0.x will sign-extend the $80000000 to }
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{ $ffffffff80000000 when converting it to int64 (JM) }
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dummy1 := int64($80000000) and (int64($43300000) shl 32);
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dummy2 := int64($43300000) shl 32;
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{$endif VER1_0}
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valuereg_is_scratch := false;
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location_reset(location,LOC_FPUREGISTER,def_cgsize(resulttype.def));
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{ the code here comes from the PowerPC Compiler Writer's Guide }
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{ * longint to double }
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{ addis R0,R0,0x4330 # R0 = 0x43300000 }
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{ stw R0,disp(R1) # store upper half }
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{ xoris R3,R3,0x8000 # flip sign bit }
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{ stw R3,disp+4(R1) # store lower half }
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{ lfd FR1,disp(R1) # float load double of value }
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{ fsub FR1,FR1,FR2 # subtract 0x4330000080000000 }
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{ * cardinal to double }
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{ addis R0,R0,0x4330 # R0 = 0x43300000 }
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{ stw R0,disp(R1) # store upper half }
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{ stw R3,disp+4(R1) # store lower half }
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{ lfd FR1,disp(R1) # float load double of value }
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{ fsub FR1,FR1,FR2 # subtract 0x4330000000000000 }
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tg.gettempofsizereference(exprasmlist,8,ref);
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signed := is_signed(left.resulttype.def);
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{ we need a certain constant for the conversion, so create it here }
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if signed then
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tempconst :=
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crealconstnode.create(double(dummy1),
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pbestrealtype^)
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else
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tempconst :=
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crealconstnode.create(double(dummy2),
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pbestrealtype^);
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resulttypepass(tempconst);
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firstpass(tempconst);
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secondpass(tempconst);
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if (tempconst.location.loc <> LOC_CREFERENCE) or
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{ has to be handled by a helper }
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is_64bitint(left.resulttype.def) then
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internalerror(200110011);
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case left.location.loc of
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LOC_REGISTER:
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begin
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leftreg := left.location.register;
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valuereg := leftreg;
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end;
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LOC_CREGISTER:
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begin
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leftreg := left.location.register;
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if signed then
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begin
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valuereg := cg.get_scratch_reg_int(exprasmlist);
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valuereg_is_scratch := true;
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end
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else
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valuereg := leftreg;
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end;
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LOC_REFERENCE,LOC_CREFERENCE:
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begin
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leftreg := cg.get_scratch_reg_int(exprasmlist);
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valuereg := leftreg;
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valuereg_is_scratch := true;
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cg.a_load_ref_reg(exprasmlist,def_cgsize(left.resulttype.def),
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left.location.reference,leftreg);
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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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tempreg := cg.get_scratch_reg_int(exprasmlist);
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exprasmlist.concat(taicpu.op_reg_const(A_LIS,tempreg,$4330));
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cg.a_load_reg_ref(exprasmlist,OS_32,tempreg,ref);
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cg.free_scratch_reg(exprasmlist,tempreg);
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if signed then
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exprasmlist.concat(taicpu.op_reg_reg_const(A_XORIS,valuereg,
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leftreg,smallint($8000)));
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inc(ref.offset,4);
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cg.a_load_reg_ref(exprasmlist,OS_32,valuereg,ref);
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dec(ref.offset,4);
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if (valuereg_is_scratch) then
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cg.free_scratch_reg(exprasmlist,valuereg);
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if (left.location.loc = LOC_REGISTER) or
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((left.location.loc = LOC_CREGISTER) and
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not signed) then
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rg.ungetregister(exprasmlist,leftreg)
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else
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cg.free_scratch_reg(exprasmlist,valuereg);
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tmpfpureg := rg.getregisterfpu(exprasmlist);
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cg.a_loadfpu_ref_reg(exprasmlist,OS_F64,tempconst.location.reference,
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tmpfpureg);
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tempconst.free;
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location.register := rg.getregisterfpu(exprasmlist);
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exprasmlist.concat(taicpu.op_reg_ref(A_LFD,location.register,
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ref));
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tg.ungetiftemp(exprasmlist,ref);
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exprasmlist.concat(taicpu.op_reg_reg_reg(A_FSUB,location.register,
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location.register,tmpfpureg));
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rg.ungetregisterfpu(exprasmlist,tmpfpureg);
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{ work around bug in some PowerPC processors }
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if (tfloatdef(resulttype.def).typ = s32real) then
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exprasmlist.concat(taicpu.op_reg_reg(A_FRSP,location.register,
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location.register));
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end;
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procedure tppctypeconvnode.second_real_to_real;
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begin
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inherited second_real_to_real;
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{ work around bug in some powerpc processors where doubles aren't }
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{ properly converted to singles }
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if (tfloatdef(left.resulttype.def).typ = s64real) and
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(tfloatdef(resulttype.def).typ = s32real) then
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exprasmlist.concat(taicpu.op_reg_reg(A_FRSP,location.register,
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location.register));
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end;
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procedure tppctypeconvnode.second_int_to_bool;
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var
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hreg1,
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hreg2 : tregister;
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resflags : tresflags;
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opsize : tcgsize;
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begin
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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_explizit 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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exit;
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end;
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location_reset(location,LOC_REGISTER,def_cgsize(left.resulttype.def));
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opsize := def_cgsize(left.resulttype.def);
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case left.location.loc of
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LOC_CREFERENCE,LOC_REFERENCE,LOC_REGISTER,LOC_CREGISTER :
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begin
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if left.location.loc in [LOC_CREFERENCE,LOC_REFERENCE] then
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begin
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reference_release(exprasmlist,left.location.reference);
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hreg2:=rg.getregisterint(exprasmlist);
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cg.a_load_ref_reg(exprasmlist,opsize,
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left.location.reference,hreg2);
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end
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else
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hreg2 := left.location.register;
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hreg1 := rg.getregisterint(exprasmlist);
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exprasmlist.concat(taicpu.op_reg_reg_const(A_SUBIC,hreg1,
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hreg2,1));
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exprasmlist.concat(taicpu.op_reg_reg_reg(A_SUBFE,hreg1,hreg1,
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hreg2));
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rg.ungetregister(exprasmlist,hreg2);
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end;
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LOC_FLAGS :
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begin
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hreg1:=rg.getregisterint(exprasmlist);
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resflags:=left.location.resflags;
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cg.g_flags2reg(exprasmlist,location.size,resflags,hreg1);
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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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location.register := hreg1;
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end;
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procedure tppctypeconvnode.second_call_helper(c : tconverttype);
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const
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secondconvert : array[tconverttype] of pointer = (
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@second_nothing, {equal}
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@second_nothing, {not_possible}
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@second_nothing, {second_string_to_string, handled in resulttype pass }
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@second_char_to_string,
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@second_nothing, {char_to_charray}
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@second_nothing, { pchar_to_string, handled in resulttype pass }
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@second_nothing, {cchar_to_pchar}
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@second_cstring_to_pchar,
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@second_ansistring_to_pchar,
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@second_string_to_chararray,
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@second_nothing, { chararray_to_string, handled in resulttype pass }
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@second_array_to_pointer,
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@second_pointer_to_array,
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@second_int_to_int,
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@second_int_to_bool,
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@second_bool_to_int, { bool_to_bool }
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@second_bool_to_int,
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@second_real_to_real,
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@second_int_to_real,
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@second_proc_to_procvar,
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@second_nothing, { arrayconstructor_to_set }
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@second_nothing, { second_load_smallset, handled in first pass }
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@second_cord_to_pointer,
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@second_nothing, { interface 2 string }
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@second_nothing, { interface 2 guid }
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@second_class_to_intf,
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@second_char_to_char,
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@second_nothing, { normal_2_smallset }
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@second_nothing { dynarray_2_openarray }
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);
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type
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tprocedureofobject = procedure of object;
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var
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r : packed record
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proc : pointer;
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obj : pointer;
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end;
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begin
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{ this is a little bit dirty but it works }
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{ and should be quite portable too }
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r.proc:=secondconvert[c];
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r.obj:=self;
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tprocedureofobject(r){$ifdef FPC}();{$endif FPC}
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end;
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procedure tppctypeconvnode.pass_2;
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{$ifdef TESTOBJEXT2}
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var
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r : preference;
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nillabel : plabel;
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{$endif TESTOBJEXT2}
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begin
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{ this isn't good coding, I think tc_bool_2_int, shouldn't be }
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{ type conversion (FK) }
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if not(convtype in [tc_bool_2_int,tc_bool_2_bool]) then
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begin
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secondpass(left);
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location_copy(location,left.location);
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if codegenerror then
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exit;
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end;
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second_call_helper(convtype);
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end;
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begin
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ctypeconvnode:=tppctypeconvnode;
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end.
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{
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$Log$
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Revision 1.21 2002-08-11 06:14:41 florian
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* fixed powerpc compilation problems
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Revision 1.20 2002/08/10 17:15:31 jonas
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* various fixes and optimizations
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Revision 1.19 2002/07/29 21:23:44 florian
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* more fixes for the ppc
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+ wrappers for the tcnvnode.first_* stuff introduced
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Revision 1.18 2002/07/29 09:20:20 jonas
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+ second_int_to_int implementation which is almost the same as the
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generic implementation, but it avoids some unnecessary type conversions
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Revision 1.17 2002/07/27 19:55:15 jonas
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+ generic implementation of tcg.g_flags2ref()
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* tcg.flags2xxx() now also needs a size parameter
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Revision 1.16 2002/07/24 14:38:00 florian
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* small typo fixed, compiles with 1.0.x again
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Revision 1.15 2002/07/21 16:57:22 jonas
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* hopefully final fix for second_int_to_real()
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Revision 1.14 2002/07/20 11:58:05 florian
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* types.pas renamed to defbase.pas because D6 contains a types
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unit so this would conflicts if D6 programms are compiled
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+ Willamette/SSE2 instructions to assembler added
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Revision 1.13 2002/07/13 06:49:39 jonas
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* fixed fpu constants in second_int_to_real (fpu values are also stored
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in big endian)
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Revision 1.12 2002/07/12 22:02:22 florian
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* fixed to compile with 1.1
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Revision 1.11 2002/07/11 14:41:34 florian
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* start of the new generic parameter handling
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Revision 1.10 2002/07/11 07:42:31 jonas
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* fixed nppccnv and enabled it
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- removed PPC specific second_int_to_int and use the generic one instead
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Revision 1.9 2002/05/20 13:30:42 carl
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* bugfix of hdisponen (base must be set, not index)
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* more portability fixes
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Revision 1.8 2002/05/18 13:34:26 peter
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* readded missing revisions
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Revision 1.7 2002/05/16 19:46:53 carl
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+ defines.inc -> fpcdefs.inc to avoid conflicts if compiling by hand
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+ try to fix temp allocation (still in ifdef)
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+ generic constructor calls
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+ start of tassembler / tmodulebase class cleanup
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Revision 1.5 2002/04/06 18:13:02 jonas
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* several powerpc-related additions and fixes
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}
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