* retag for unitrwunitrw

git-svn-id: http://svn.freepascal.org/svn/fpc/branches/unitrw@1551 3ad0048d-3df7-0310-abae-a5850022a9f2

1 files changed, 91 insertions, 0 deletions

diff --git a/compiler/x86/nx86con.pas b/compiler/x86/nx86con.pas
new file mode 100644
index 0000000000..123f94cde8
--- /dev/null
+++ b/compiler/x86/nx86con.pas
@@ -0,0 +1,91 @@
+{
+    Copyright (c) 1998-2002 by Florian Klaempfl
+
+    Generate i386 assembler for constants
+
+    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 nx86con;
+
+{$i fpcdefs.inc}
+
+interface
+
+    uses
+       node,ncon,ncgcon;
+
+    type
+       tx86realconstnode = class(tcgrealconstnode)
+          function pass_1 : tnode;override;
+          procedure pass_2;override;
+       end;
+
+implementation
+
+    uses
+      systems,globals,
+      symdef,
+      defutil,
+      cpubase,
+      cga,cgx86,cgobj,cgbase,cgutils;
+
+{*****************************************************************************
+                           TI386REALCONSTNODE
+*****************************************************************************}
+
+    function tx86realconstnode.pass_1 : tnode;
+      begin
+         result:=nil;
+         if is_number_float(value_real) and not(use_sse(resulttype.def)) and (value_real=1.0) or (value_real=0.0) then
+           begin
+              expectloc:=LOC_FPUREGISTER;
+              registersfpu:=1;
+           end
+         else
+           expectloc:=LOC_CREFERENCE;
+      end;
+
+    procedure tx86realconstnode.pass_2;
+
+      begin
+         if is_number_float(value_real) then
+           begin
+             if (value_real=1.0) and not(use_sse(resulttype.def)) then
+               begin
+                  emit_none(A_FLD1,S_NO);
+                  location_reset(location,LOC_FPUREGISTER,def_cgsize(resulttype.def));
+                  location.register:=NR_ST;
+                  tcgx86(cg).inc_fpu_stack;
+               end
+             else if (value_real=0.0) and not(use_sse(resulttype.def)) then
+               begin
+                  emit_none(A_FLDZ,S_NO);
+                  location_reset(location,LOC_FPUREGISTER,def_cgsize(resulttype.def));
+                  location.register:=NR_ST;
+                  tcgx86(cg).inc_fpu_stack;
+               end
+            else
+              inherited pass_2;
+           end
+         else
+           inherited pass_2;
+      end;
+
+
+begin
+   crealconstnode:=tx86realconstnode;
+end.