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{
Copyright (c) 1998-2002 by Florian Klaempfl
Generate PowerPC 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.
****************************************************************************
}
unit ngppccnv;
{$i fpcdefs.inc}
interface
uses
node,ncnv,ncgcnv;
type
tgenppctypeconvnode = class(tcgtypeconvnode)
protected
{ procedure second_int_to_int;override; }
{ procedure second_string_to_string;override; }
{ procedure second_cstring_to_pchar;override; }
{ procedure second_string_to_chararray;override; }
{ procedure second_array_to_pointer;override; }
{ function first_int_to_real: tnode; override; }
{ procedure second_pointer_to_array;override; }
{ procedure second_chararray_to_string;override; }
{ procedure second_char_to_string;override; }
{ procedure second_int_to_real;override; }
{ procedure second_real_to_real;override; }
{ procedure second_cord_to_pointer;override; }
{ procedure second_proc_to_procvar;override; }
{ procedure second_bool_to_int;override; }
procedure second_int_to_bool;override;
{ procedure second_load_smallset;override; }
{ procedure second_ansistring_to_pchar;override; }
{ procedure second_pchar_to_string;override; }
{ procedure second_class_to_intf;override; }
{ procedure second_char_to_char;override; }
end;
implementation
uses
verbose,globtype,globals,systems,
symconst,symdef,aasmbase,aasmtai,aasmdata,
defutil,
cgbase,cgutils,pass_1,pass_2,
ncgutil,procinfo,
cpubase,aasmcpu,
rgobj,tgobj,cgobj;
procedure tgenppctypeconvnode.second_int_to_bool;
var
hreg1,
hreg2 : tregister;
{$ifndef cpu64bitalu}
href : treference;
{$endif not cpu64bitalu}
resflags : tresflags;
opsize : tcgsize;
hlabel, oldTrueLabel, oldFalseLabel : tasmlabel;
newsize : tcgsize;
begin
oldTrueLabel:=current_procinfo.CurrTrueLabel;
oldFalseLabel:=current_procinfo.CurrFalseLabel;
current_asmdata.getjumplabel(current_procinfo.CurrTrueLabel);
current_asmdata.getjumplabel(current_procinfo.CurrFalseLabel);
secondpass(left);
if codegenerror then
exit;
{ Explicit typecasts from any ordinal type to a boolean type }
{ must not change the ordinal value }
if (nf_explicit in flags) and
not(left.location.loc in [LOC_FLAGS,LOC_JUMP]) then
begin
location_copy(location,left.location);
newsize:=def_cgsize(resultdef);
{ change of size? change sign only if location is LOC_(C)REGISTER? Then we have to sign/zero-extend }
if (tcgsize2size[newsize]<>tcgsize2size[left.location.size]) or
((newsize<>left.location.size) and (location.loc in [LOC_REGISTER,LOC_CREGISTER])) then
location_force_reg(current_asmdata.CurrAsmList,location,newsize,true)
else
location.size:=newsize;
current_procinfo.CurrTrueLabel:=oldTrueLabel;
current_procinfo.CurrFalseLabel:=oldFalseLabel;
exit;
end;
location_reset(location,LOC_REGISTER,def_cgsize(resultdef));
opsize := def_cgsize(left.resultdef);
{$ifndef cpu64bitalu}
if (opsize in [OS_64,OS_S64]) then
opsize:=OS_32;
{$endif not cpu64bitalu}
case left.location.loc of
LOC_CREFERENCE,LOC_REFERENCE,LOC_REGISTER,LOC_CREGISTER :
begin
if left.location.loc in [LOC_CREFERENCE,LOC_REFERENCE] then
begin
hreg1:=cg.getintregister(current_asmdata.CurrAsmList,OS_INT);
{$ifndef cpu64bitalu}
if left.location.size in [OS_64,OS_S64] then
begin
cg.a_load_ref_reg(current_asmdata.CurrAsmList,OS_INT,OS_INT,left.location.reference,hreg1);
hreg2:=cg.getintregister(current_asmdata.CurrAsmList,OS_INT);
href:=left.location.reference;
inc(href.offset,4);
cg.a_load_ref_reg(current_asmdata.CurrAsmList,OS_INT,OS_INT,href,hreg2);
cg.a_op_reg_reg_reg(current_asmdata.CurrAsmList,OP_OR,OS_32,hreg1,hreg2,hreg1);
end
else
{$endif not cpu64bitalu}
cg.a_load_ref_reg(current_asmdata.CurrAsmList,opsize,opsize,left.location.reference,hreg1);
end
else
begin
hreg1:=cg.getintregister(current_asmdata.CurrAsmList,OS_INT);
{$ifndef cpu64bitalu}
if left.location.size in [OS_64,OS_S64] then
begin
hreg1:=cg.getintregister(current_asmdata.CurrAsmList,OS_32);
cg.a_op_reg_reg_reg(current_asmdata.CurrAsmList,OP_OR,OS_32,left.location.register64.reghi,left.location.register64.reglo,hreg1);
end
else
{$endif not cpu64bitalu}
cg.a_load_reg_reg(current_asmdata.CurrAsmList,opsize,opsize,left.location.register,hreg1);
end;
hreg2 := cg.getintregister(current_asmdata.CurrAsmList,OS_INT);
if not(is_cbool(resultdef)) then
begin
{ hreg2:=hreg1-1; carry:=hreg1=0 }
current_asmdata.CurrAsmList.concat(taicpu.op_reg_reg_const(A_SUBIC,hreg2,hreg1,1));
{ hreg1:=hreg1-hreg2+carry (= hreg1-(hreg1-1)-carry) }
current_asmdata.CurrAsmList.concat(taicpu.op_reg_reg_reg(A_SUBFE,hreg1,hreg2,hreg1));
end
else
begin
{ carry:=hreg1<>0 }
current_asmdata.CurrAsmList.concat(taicpu.op_reg_reg_const(A_SUBFIC,hreg2,hreg1,0));
{ hreg1:=hreg1-hreg1-carry }
current_asmdata.CurrAsmList.concat(taicpu.op_reg_reg_reg(A_SUBFE,hreg1,hreg1,hreg1));
end;
end;
LOC_FLAGS :
begin
hreg1:=cg.getintregister(current_asmdata.CurrAsmList,OS_INT);
resflags:=left.location.resflags;
cg.g_flags2reg(current_asmdata.CurrAsmList,location.size,resflags,hreg1);
if (is_cbool(resultdef)) then
cg.a_op_reg_reg(current_asmdata.CurrAsmList,OP_NEG,location.size,hreg1,hreg1);
end;
LOC_JUMP :
begin
hreg1:=cg.getintregister(current_asmdata.CurrAsmList,OS_INT);
current_asmdata.getjumplabel(hlabel);
cg.a_label(current_asmdata.CurrAsmList,current_procinfo.CurrTrueLabel);
if not(is_cbool(resultdef)) then
cg.a_load_const_reg(current_asmdata.CurrAsmList,OS_INT,1,hreg1)
else
cg.a_load_const_reg(current_asmdata.CurrAsmList,OS_INT,-1,hreg1);
cg.a_jmp_always(current_asmdata.CurrAsmList,hlabel);
cg.a_label(current_asmdata.CurrAsmList,current_procinfo.CurrFalseLabel);
cg.a_load_const_reg(current_asmdata.CurrAsmList,OS_INT,0,hreg1);
cg.a_label(current_asmdata.CurrAsmList,hlabel);
end;
else
internalerror(10062);
end;
{$ifndef cpu64bitalu}
if (location.size in [OS_64,OS_S64]) then
begin
location.register64.reglo:=hreg1;
location.register64.reghi:=cg.getintregister(current_asmdata.CurrAsmList,OS_32);
if (is_cbool(resultdef)) then
{ reglo is either 0 or -1 -> reghi has to become the same }
cg.a_load_reg_reg(current_asmdata.CurrAsmList,OS_32,OS_32,location.register64.reglo,location.register64.reghi)
else
{ unsigned }
cg.a_load_const_reg(current_asmdata.CurrAsmList,OS_32,0,location.register64.reghi);
end
else
{$endif cpu64bitalu}
location.register:=hreg1;
current_procinfo.CurrTrueLabel:=oldTrueLabel;
current_procinfo.CurrFalseLabel:=oldFalseLabel;
end;
end.
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