mirror of
https://gitlab.com/freepascal.org/fpc/source.git
synced 2025-10-31 20:12:55 +01:00
b023627f6a
o changed type of opsize field of tcgcasenode from tcgsize into tdef,
and fixed compilation of other code generator units after this change
git-svn-id: branches/jvmbackend@18339 -
261 lines
9.6 KiB
ObjectPascal
261 lines
9.6 KiB
ObjectPascal
{
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Copyright (c) 1998-2002 by Florian Klaempfl
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Generate arm 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 narmset;
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{$i fpcdefs.inc}
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interface
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uses
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globtype,
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node,nset,pass_1,ncgset;
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type
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tarmcasenode = class(tcgcasenode)
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procedure optimizevalues(var max_linear_list:aint;var max_dist:aword);override;
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function has_jumptable : boolean;override;
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procedure genjumptable(hp : pcaselabel;min_,max_ : aint);override;
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procedure genlinearlist(hp : pcaselabel);override;
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end;
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implementation
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uses
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systems,
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verbose,globals,constexp,
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symconst,symdef,defutil,
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aasmbase,aasmtai,aasmdata,aasmcpu,
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cgbase,pass_2,
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ncon,
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cpubase,cpuinfo,procinfo,
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cgutils,cgobj,ncgutil,
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cgcpu;
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{*****************************************************************************
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TARMCASENODE
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*****************************************************************************}
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procedure tarmcasenode.optimizevalues(var max_linear_list:aint;var max_dist:aword);
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begin
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inc(max_linear_list,2)
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end;
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function tarmcasenode.has_jumptable : boolean;
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begin
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has_jumptable:=true;
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end;
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procedure tarmcasenode.genjumptable(hp : pcaselabel;min_,max_ : aint);
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var
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last : TConstExprInt;
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indexreg : tregister;
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href : treference;
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tablelabel: TAsmLabel;
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opcgsize : tcgsize;
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procedure genitem(list:TAsmList;t : pcaselabel);
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var
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i : aint;
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begin
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if assigned(t^.less) then
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genitem(list,t^.less);
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{ fill possible hole }
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for i:=last.svalue+1 to t^._low.svalue-1 do
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list.concat(Tai_const.Create_sym(elselabel));
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for i:=t^._low.svalue to t^._high.svalue do
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list.concat(Tai_const.Create_sym(blocklabel(t^.blockid)));
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last:=t^._high.svalue;
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if assigned(t^.greater) then
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genitem(list,t^.greater);
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end;
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procedure genitem_thumb2(list:TAsmList;t : pcaselabel);
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var
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i : aint;
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begin
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if assigned(t^.less) then
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genitem_thumb2(list,t^.less);
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{ fill possible hole }
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for i:=last.svalue+1 to t^._low.svalue-1 do
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list.concat(Tai_const.Create_rel_sym(aitconst_half16bit,tablelabel,elselabel));
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for i:=t^._low.svalue to t^._high.svalue do
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list.concat(Tai_const.Create_rel_sym(aitconst_half16bit,tablelabel,blocklabel(t^.blockid)));
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last:=t^._high.svalue;
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if assigned(t^.greater) then
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genitem_thumb2(list,t^.greater);
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end;
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begin
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opcgsize:=def_cgsize(opsize);
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if not(jumptable_no_range) then
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begin
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{ case expr less than min_ => goto elselabel }
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cg.a_cmp_const_reg_label(current_asmdata.CurrAsmList,opcgsize,jmp_lt,aint(min_),hregister,elselabel);
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{ case expr greater than max_ => goto elselabel }
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cg.a_cmp_const_reg_label(current_asmdata.CurrAsmList,opcgsize,jmp_gt,aint(max_),hregister,elselabel);
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end;
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{ make it a 32bit register }
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indexreg:=cg.makeregsize(current_asmdata.CurrAsmList,hregister,OS_INT);
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cg.a_load_reg_reg(current_asmdata.CurrAsmList,opcgsize,OS_INT,hregister,indexreg);
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if current_settings.cputype in cpu_thumb2 then
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begin
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{ adjust index }
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cg.a_op_const_reg_reg(current_asmdata.CurrAsmList,OP_SUB,OS_ADDR,min_,indexreg,indexreg);
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{ create reference and generate jump table }
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reference_reset(href,4);
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href.base:=NR_PC;
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href.index:=indexreg;
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href.shiftmode:=SM_LSL;
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href.shiftimm:=1;
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current_asmdata.CurrAsmList.Concat(taicpu.op_ref(A_TBH,href));
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{ generate jump table }
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current_asmdata.getjumplabel(tablelabel);
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cg.a_label(current_asmdata.CurrAsmList,tablelabel);
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last:=min_;
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genitem_thumb2(current_asmdata.CurrAsmList,hp);
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end
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else
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begin
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{ adjust index }
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cg.a_op_const_reg_reg(current_asmdata.CurrAsmList,OP_SUB,OS_ADDR,min_+1,indexreg,indexreg);
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{ create reference and generate jump table }
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reference_reset(href,4);
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href.base:=NR_PC;
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href.index:=indexreg;
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href.shiftmode:=SM_LSL;
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href.shiftimm:=2;
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cg.a_load_ref_reg(current_asmdata.CurrAsmList,OS_ADDR,OS_ADDR,href,NR_PC);
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{ generate jump table }
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last:=min_;
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genitem(current_asmdata.CurrAsmList,hp);
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end;
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end;
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procedure tarmcasenode.genlinearlist(hp : pcaselabel);
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var
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first : boolean;
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lastrange : boolean;
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last : TConstExprInt;
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cond_lt,cond_le : tresflags;
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opcgsize : tcgsize;
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procedure genitem(t : pcaselabel);
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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.resultdef)) then
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begin
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cg.a_cmp_const_reg_label(current_asmdata.CurrAsmList,opcgsize,jmp_lt,aint(t^._low.svalue),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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if t^._low-last=0 then
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cg.a_cmp_const_reg_label(current_asmdata.CurrAsmList, opcgsize, OC_EQ,0,hregister,blocklabel(t^.blockid))
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else
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begin
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tcgarm(cg).cgsetflags:=true;
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cg.a_op_const_reg(current_asmdata.CurrAsmList, OP_SUB, opcgsize, aint(int64(t^._low-last)), hregister);
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tcgarm(cg).cgsetflags:=false;
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cg.a_jmp_flags(current_asmdata.CurrAsmList,F_EQ,blocklabel(t^.blockid));
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end;
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last:=t^._low;
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lastrange:=false;
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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.resultdef)) or (get_min_value(left.resultdef)<>0) then
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begin
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tcgarm(cg).cgsetflags:=true;
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cg.a_op_const_reg(current_asmdata.CurrAsmList, OP_SUB, opcgsize, aint(int64(t^._low)), hregister);
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tcgarm(cg).cgsetflags:=false;
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end;
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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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tcgarm(cg).cgsetflags:=true;
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cg.a_op_const_reg(current_asmdata.CurrAsmList, OP_SUB, opcgsize, aint(int64(t^._low-last)), hregister);
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tcgarm(cg).cgsetflags:=false;
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{ no jump necessary here if the new range starts at }
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{ at the value following the previous one }
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if ((t^._low-last) <> 1) or
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(not lastrange) then
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cg.a_jmp_flags(current_asmdata.CurrAsmList,cond_lt,elselabel);
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end;
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tcgarm(cg).cgsetflags:=true;
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cg.a_op_const_reg(current_asmdata.CurrAsmList,OP_SUB,opcgsize,aint(int64(t^._high-t^._low)),hregister);
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tcgarm(cg).cgsetflags:=false;
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cg.a_jmp_flags(current_asmdata.CurrAsmList,cond_le,blocklabel(t^.blockid));
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last:=t^._high;
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lastrange:=true;
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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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opcgsize:=def_cgsize(opsize);
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if with_sign then
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begin
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cond_lt:=F_LT;
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cond_le:=F_LE;
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end
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else
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begin
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cond_lt:=F_CC;
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cond_le:=F_LS;
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end;
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{ do we need to generate cmps? }
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if (with_sign and (min_label<0)) 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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lastrange:=false;
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first:=true;
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genitem(hp);
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cg.a_jmp_always(current_asmdata.CurrAsmList,elselabel);
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end;
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end;
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begin
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ccasenode:=tarmcasenode;
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end.
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