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234 lines
7.3 KiB
ObjectPascal
234 lines
7.3 KiB
ObjectPascal
{
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$Id$
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Copyright (c) 1998-2002 by Florian Klaempfl and Carl Eric Codere
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Generate PowerPC assembler for in set/case 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 nppcset;
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{$i fpcdefs.inc}
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interface
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uses
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node,nset,ncgset,cpubase,cginfo,cgbase,cgobj,aasmbase,aasmtai;
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type
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tppccasenode = class(tcgcasenode)
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protected
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procedure genlinearlist(hp : pcaserecord); override;
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end;
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implementation
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uses
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globtype,systems,
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verbose,globals,
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symconst,symdef,defutil,
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paramgr,
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cpuinfo,
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pass_2,cgcpu,
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ncon,
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cga,tgobj,ncgutil,regvars,rgobj,aasmcpu;
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{*****************************************************************************
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TCGCASENODE
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*****************************************************************************}
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procedure tppccasenode.genlinearlist(hp : pcaserecord);
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var
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first : boolean;
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last : TConstExprInt;
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resflags: tresflags;
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procedure genitem(t : pcaserecord);
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var r:Tregister;
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procedure gensub(value:longint);
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var
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tmpreg: tregister;
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begin
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value := -value;
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if (value >= low(smallint)) and
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(value <= high(smallint)) then
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exprasmlist.concat(taicpu.op_reg_reg_const(A_ADDIC_,hregister,
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hregister,value))
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else
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begin
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tmpreg := cg.get_scratch_reg_int(exprasmlist,OS_INT);
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cg.a_load_const_reg(exprasmlist,OS_INT,aword(value),tmpreg);
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exprasmlist.concat(taicpu.op_reg_reg_reg(A_ADD_,hregister,
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hregister,tmpreg));
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cg.free_scratch_reg(exprasmlist,tmpreg);
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end;
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end;
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begin
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if assigned(t^.less) then
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genitem(t^.less);
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{ need we to test the first value }
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if first and (t^._low>get_min_value(left.resulttype.def)) then
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begin
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cg.a_cmp_const_reg_label(exprasmlist,OS_INT,jmp_lt,
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aword(t^._low),hregister,elselabel);
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end;
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if t^._low=t^._high then
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begin
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r.enum:=R_CR0;
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if t^._low-last=0 then
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exprasmlist.concat(taicpu.op_reg_reg_const(A_CMPWI,r,
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hregister,0))
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else
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gensub(longint(t^._low-last));
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last:=t^._low;
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resflags.cr := R_CR0;
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resflags.flag := F_EQ;
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cg.a_jmp_flags(exprasmlist,resflags,t^.statement);
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end
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else
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begin
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{ it begins with the smallest label, if the value }
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{ is even smaller then jump immediately to the }
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{ ELSE-label }
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if first then
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begin
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{ have we to ajust the first value ? }
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if (t^._low>get_min_value(left.resulttype.def)) then
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gensub(longint(t^._low));
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end
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else
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begin
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{ if there is no unused label between the last and the }
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{ present label then the lower limit can be checked }
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{ immediately. else check the range in between: }
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gensub(longint(t^._low-last));
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if (t^._low-last) <> 1 then
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tcgppc(cg).a_jmp_cond(exprasmlist,jmp_lt,elselabel);
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end;
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gensub(longint(t^._high-t^._low));
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tcgppc(cg).a_jmp_cond(exprasmlist,jmp_le,t^.statement);
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last:=t^._high;
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end;
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first:=false;
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if assigned(t^.greater) then
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genitem(t^.greater);
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end;
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begin
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{ do we need to generate cmps? }
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if (with_sign and (min_label<0)) or
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(opsize = OS_32) then
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genlinearcmplist(hp)
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else
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begin
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last:=0;
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first:=true;
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genitem(hp);
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cg.a_jmp_always(exprasmlist,elselabel);
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end;
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end;
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begin
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ccasenode:=tppccasenode;
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end.
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{
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$Log$
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Revision 1.7 2003-02-19 22:00:16 daniel
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* Code generator converted to new register notation
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- Horribily outdated todo.txt removed
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Revision 1.6 2003/01/08 18:43:58 daniel
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* Tregister changed into a record
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Revision 1.5 2002/11/25 17:43:28 peter
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* splitted defbase in defutil,symutil,defcmp
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* merged isconvertable and is_equal into compare_defs(_ext)
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* made operator search faster by walking the list only once
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Revision 1.4 2002/10/21 18:08:05 jonas
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* some range errors fixed
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Revision 1.3 2002/09/09 13:57:45 jonas
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* small optimization to case genlist() case statements
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Revision 1.2 2002/09/08 20:14:33 jonas
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* use genlinearcmplist() for unsigned 32bit case statements instead
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of genlinearlist(), because the addic. instruction always sets the
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flags as if the arguments are signed 32bits (for smaller unsigned
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types, this doesn't matter since they fit in s32bit)
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Revision 1.1 2002/08/11 11:39:12 jonas
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+ powerpc-specific genlinearlist
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Revision 1.13 2002/08/11 06:14:40 florian
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* fixed powerpc compilation problems
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Revision 1.12 2002/08/10 17:15:12 jonas
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* optimizations and bugfix
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Revision 1.11 2002/07/28 09:24:18 carl
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+ generic case node
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Revision 1.10 2002/07/23 14:31:00 daniel
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* Added internal error when asked to generate code for 'if expr in []'
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Revision 1.9 2002/07/23 12:34:30 daniel
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* Readded old set code. To use it define 'oldset'. Activated by default
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for ppc.
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Revision 1.8 2002/07/22 11:48:04 daniel
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* Sets are now internally sets.
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Revision 1.7 2002/07/21 16:58:20 jonas
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* fixed some bugs in tcginnode.pass_2() and optimized the bit test
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Revision 1.6 2002/07/20 11:57:54 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 1.5 2002/07/11 14:41:28 florian
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* start of the new generic parameter handling
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Revision 1.4 2002/07/07 10:16:29 florian
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* problems with last commit fixed
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Revision 1.3 2002/07/06 20:19:25 carl
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+ generic set handling
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Revision 1.2 2002/07/01 16:23:53 peter
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* cg64 patch
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* basics for currency
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* asnode updates for class and interface (not finished)
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Revision 1.1 2002/06/16 08:14:56 carl
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+ generic sets
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}
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