* initial revision, not yet enabled

compiler/sparc/ncpuset.pas

@@ -0,0 +1,133 @@
+{
+    $Id$
+    Copyright (c) 1998-2004 by Florian Klaempfl
+
+    Generate sparc assembler for in set/case 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 ncpuset;
+
+{$i fpcdefs.inc}
+
+  interface
+
+    uses
+       globtype,
+       nset,
+       ncgset;
+
+    type
+       tcpucasenode = class(tcgcasenode)
+         protected
+           procedure optimizevalues(var max_linear_list:aint;var max_dist:aword);override;
+           function has_jumptable : boolean;override;
+           procedure genjumptable(hp : pcaserecord;min_,max_ : aint);override;
+       end;
+
+
+  implementation
+
+    uses
+      globals,
+      systems,
+      cpubase,
+      aasmbase,aasmtai,aasmcpu,
+      cgbase,cgutils,cgobj,
+      procinfo;
+
+    procedure tcpucasenode.optimizevalues(var max_linear_list:aint;var max_dist:aword);
+      begin
+        { give the jump table a higher priority }
+        max_dist:=(max_dist*3) div 2;
+      end;
+
+
+    function tcpucasenode.has_jumptable : boolean;
+      begin
+        has_jumptable:=true;
+      end;
+
+
+    procedure tcpucasenode.genjumptable(hp : pcaserecord;min_,max_ : aint);
+      var
+        table : tasmlabel;
+        last : TConstExprInt;
+        indexreg,jmpreg,basereg : tregister;
+        href : treference;
+        jumpsegment : TAAsmOutput;
+
+        procedure genitem(t : pcaserecord);
+          var
+            i : aint;
+          begin
+            if assigned(t^.less) then
+              genitem(t^.less);
+            { fill possible hole }
+            for i:=last+1 to t^._low-1 do
+              jumpSegment.concat(Tai_const.Create_sym(elselabel));
+            for i:=t^._low to t^._high do
+              jumpSegment.concat(Tai_const.Create_sym(t^.statement));
+            last:=t^._high;
+            if assigned(t^.greater) then
+              genitem(t^.greater);
+          end;
+
+      begin
+        if (cs_create_smart in aktmoduleswitches) or
+           (af_smartlink_sections in target_asm.flags) then
+          jumpsegment:=current_procinfo.aktlocaldata
+        else
+          jumpsegment:=datasegment;
+        if not(jumptable_no_range) then
+          begin
+             { case expr less than min_ => goto elselabel }
+             cg.a_cmp_const_reg_label(exprasmlist,opsize,jmp_lt,aint(min_),hregister,elselabel);
+             { case expr greater than max_ => goto elselabel }
+             cg.a_cmp_const_reg_label(exprasmlist,opsize,jmp_gt,aint(max_),hregister,elselabel);
+          end;
+        objectlibrary.getlabel(table);
+        indexreg:=cg.getaddressregister(exprasmlist);
+        cg.a_op_const_reg_reg(exprasmlist,OP_SHL,OS_ADDR,2,hregister,indexreg);
+        { create reference }
+        reference_reset_symbol(href,table,0);
+        href.offset:=(-aint(min_))*4;
+        basereg:=cg.getaddressregister(exprasmlist);
+        cg.a_loadaddr_ref_reg(exprasmlist,href,basereg);
+
+        jmpreg:=cg.getaddressregister(exprasmlist);
+        cg.a_op_reg_reg_reg(exprasmlist,OP_ADD,OS_ADDR,indexreg,basereg,jmpreg);
+        exprasmlist.concat(taicpu.op_reg(A_JMP,jmpreg));
+        { Delay slot }
+        exprasmlist.concat(taicpu.op_none(A_NOP));
+        { generate jump table }
+        if not(cs_littlesize in aktglobalswitches) then
+          jumpSegment.concat(Tai_Align.Create_Op(4,0));
+        jumpSegment.concat(Tai_label.Create(table));
+        last:=min_;
+        genitem(hp);
+      end;
+
+
+
+
+end.
+{
+  $Log$
+  Revision 1.1  2004-10-30 17:50:53  florian
+    * initial revision, not yet enabled
+}