- removed as this unit is no longer necessary

compiler/ia64/tgcpu.pas

@@ -1,408 +0,0 @@
-{
-    $Id$
-    Copyright (C) 2000 by Florian Klaempfl
-
-    This unit handles the temporary variables stuff for iA64
-    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 tgcpu;
-
-{$i fpcdefs.inc}
-
-interface
-
-    uses
-       cobjects,globals,
-       hcodegen,verbose,aasm,
-       node,
-       cpuinfo,cpubase,cpuasm;
-
-    const
-       { this is iA64 specific }
-       countusableregqp : byte = c_countusableregsqp;
-
-       { this value is used in tsaved, if the register isn't saved }
-       reg_not_saved = $7fffffff;
-
-    type
-       tpushed = array[R_NO..R_NO] of boolean;
-       tsaved = array[R_NO..R_NO] of longint;
-
-    var
-       { tries to hold the amount of times which the current tree is processed  }
-       t_times : longint;
-
-    function getregisterint : tregister;
-    procedure ungetregisterint(r : tregister);
-    { tries to allocate the passed register, if possible }
-    function getexplicitregisterint(r : tregister) : tregister;
-
-    procedure ungetregister(r : tregister);
-
-    procedure cleartempgen;
-    procedure del_reference(const ref : treference);
-    procedure del_locref(const location : tlocation);
-    procedure del_location(const l : tlocation);
-
-    { pushs and restores registers }
-    procedure pushusedregisters(var pushed : tpushed;b : byte);
-    procedure popusedregisters(const pushed : tpushed);
-
-    { saves and restores used registers to temp. values }
-    procedure saveusedregisters(var saved : tsaved;b : byte);
-    procedure restoreusedregisters(const saved : tsaved);
-
-    { increments the push count of all registers in b}
-    procedure incrementregisterpushed(b : byte);
-
-    procedure clearregistercount;
-    procedure resetusableregisters;
-
-    type
-       regvar_longintarray = array[0..128+128+64-1] of longint;
-       regvar_booleanarray = array[0..128+128+64-1] of boolean;
-       regvar_ptreearray = array[0..128+128+64-1] of tnode;
-
-    var
-       unused,usableregs : tregisterset;
-
-       { uses only 1 byte while a set uses in FPC 32 bytes }
-       usedinproc : byte;
-
-       { count, how much a register must be pushed if it is used as register }
-       { variable                                                           }
-       reg_pushes : regvar_longintarray;
-       is_reg_var : regvar_booleanarray;
-
-
-implementation
-
-    uses
-      globtype,temp_gen;
-
-    procedure incrementregisterpushed(b : byte);
-
-      var
-         regi : tregister;
-
-      begin
-{!!!!!!!!
-         for regi:=R_EAX to R_EDI do
-           begin
-              if (b and ($80 shr word(regi)))<>0 then
-                inc(reg_pushes[regi],t_times*2);
-           end;
-}
-      end;
-
-    procedure pushusedregisters(var pushed : tpushed;b : byte);
-
-      var
-         r : tregister;
-
-      begin
-{!!!!!!!!
-         usedinproc:=usedinproc or b;
-         for r:=R_EAX to R_EBX do
-           begin
-              pushed[r]:=false;
-              { if the register is used by the calling subroutine    }
-              if ((b and ($80 shr byte(r)))<>0) then
-                begin
-                   { and is present in use }
-                   if not(r in unused) then
-                     begin
-                        { then save it }
-                        exprasmlist^.concat(new(paicpu,op_reg(A_PUSH,S_L,r)));
-
-                        { here was a big problem  !!!!!}
-                        { you cannot do that for a register that is
-                        globally assigned to a var
-                        this also means that you must push it much more
-                        often, but there must be a better way
-                        maybe by putting the value back to the stack !! }
-                        if not(is_reg_var[r]) then
-                          begin
-                            unused:=unused+[r];
-                          end;
-                        pushed[r]:=true;
-                     end;
-                end;
-           end;
-}
-      end;
-
-    procedure saveusedregisters(var saved : tsaved;b : byte);
-
-      var
-         r : tregister;
-         hr : treference;
-
-      begin
-{!!!!!!!
-         usedinproc:=usedinproc or b;
-         for r:=R_EAX to R_EBX do
-           begin
-              saved[r]:=reg_not_saved;
-              { if the register is used by the calling subroutine    }
-              if ((b and ($80 shr byte(r)))<>0) then
-                begin
-                   { and is present in use }
-                   if not(r in unused) then
-                     begin
-                        { then save it }
-                        gettempofsizereference(4,hr);
-                        saved[r]:=hr.offset;
-                        exprasmlist^.concat(new(paicpu,op_reg_ref(A_MOV,S_L,r,newreference(hr))));
-                        { here was a big problem  !!!!!}
-                        { you cannot do that for a register that is
-                        globally assigned to a var
-                        this also means that you must push it much more
-                        often, but there must be a better way
-                        maybe by putting the value back to the stack !! }
-                        if not(is_reg_var[r]) then
-                          begin
-                            unused:=unused+[r];
-                          end;
-                     end;
-                end;
-           end;
-}
-      end;
-
-    procedure popusedregisters(const pushed : tpushed);
-
-      var
-         r : tregister;
-
-      begin
-{!!!!!!!
-         { restore in reverse order: }
-         for r:=R_EBX downto R_EAX do
-           if pushed[r] then
-             begin
-                exprasmlist^.concat(new(paicpu,op_reg(A_POP,S_L,r)));
-                unused:=unused-[r];
-             end;
-}
-      end;
-
-    procedure restoreusedregisters(const saved : tsaved);
-      var
-         r : tregister;
-         hr : treference;
-
-      begin
-{
-         { restore in reverse order: }
-         for r:=R_EBX downto R_EAX do
-           if saved[r]<>reg_not_saved then
-             begin
-                reset_reference(hr);
-                hr.base:=frame_pointer_reg;
-                hr.offset:=saved[r];
-                exprasmlist^.concat(new(paicpu,op_ref_reg(A_MOV,S_L,newreference(hr),r)));
-                unused:=unused-[r];
-                ungetiftemp(hr);
-             end;
-}
-      end;
-
-    procedure ungetregister(r : tregister);
-
-      begin
-{
-         if r in [R_EAX,R_ECX,R_EDX,R_EBX,R_ESP,R_EBP,R_ESI,R_EDI] then
-           ungetregister32(r)
-          else if r in [R_AX,R_CX,R_DX,R_BX,R_SP,R_BP,R_SI,R_DI] then
-           ungetregister32(reg16toreg32(r))
-         else if r in [R_AL,R_BL,R_CL,R_DL] then
-           ungetregister32(reg8toreg32(r))
-         else internalerror(18);
-}
-      end;
-
-    procedure ungetregisterint(r : tregister);
-
-      begin
-{
-         if (r = R_EDI) or
-            ((not assigned(procinfo^._class)) and (r = R_ESI)) then
-           begin
-             exprasmlist^.concat(new(pairegalloc,dealloc(r)));
-             exit;
-           end;
-         if cs_regalloc in aktglobalswitches then
-           begin
-              { takes much time }
-              if not(r in usableregs) then
-                exit;
-              unused:=unused+[r];
-              inc(usablereg32);
-           end
-         else
-           begin
-              if not(r in [R_EAX,R_EBX,R_ECX,R_EDX]) then
-                exit;
-                  inc(usablereg32);
-              unused:=unused+[r];
-           end;
-         exprasmlist^.concat(new(pairegalloc,dealloc(r)));
-}
-      end;
-
-
-    procedure del_reference(const ref : treference);
-
-      begin
-         if ref.is_immediate then
-           exit;
-         ungetregisterint(ref.base);
-      end;
-
-
-    procedure del_locref(const location : tlocation);
-      begin
-         if (location.loc<>LOC_MEM) and (location.loc<>LOC_REFERENCE) then
-           exit;
-         if location.reference.is_immediate then
-           exit;
-         ungetregisterint(location.reference.base);
-      end;
-
-
-    procedure del_location(const l : tlocation);
-      begin
-        case l.loc of
-          LOC_REGISTER :
-            ungetregister(l.register);
-          LOC_MEM,LOC_REFERENCE :
-            del_reference(l.reference);
-        end;
-      end;
-
-
-    function getregisterint : tregister;
-      begin
-{
-         if usableregint=0 then
-           internalerror(10);
-         dec(usableregint);
-         if R_EAX in unused then
-           begin
-              unused:=unused-[R_EAX];
-              usedinproc:=usedinproc or ($80 shr byte(R_EAX));
-              getregister32:=R_EAX;
-              exprasmlist^.concat(new(pairegalloc,alloc(R_EAX)));
-           end
-         else if R_EDX in unused then
-           begin
-              unused:=unused-[R_EDX];
-              usedinproc:=usedinproc or ($80 shr byte(R_EDX));
-              getregister32:=R_EDX;
-              exprasmlist^.concat(new(pairegalloc,alloc(R_EDX)));
-           end
-         else if R_EBX in unused then
-           begin
-              unused:=unused-[R_EBX];
-              usedinproc:=usedinproc or ($80 shr byte(R_EBX));
-              getregister32:=R_EBX;
-              exprasmlist^.concat(new(pairegalloc,alloc(R_EBX)));
-           end
-         else if R_ECX in unused then
-           begin
-              unused:=unused-[R_ECX];
-              usedinproc:=usedinproc or ($80 shr byte(R_ECX));
-              getregister32:=R_ECX;
-              exprasmlist^.concat(new(pairegalloc,alloc(R_ECX)));
-           end
-         else internalerror(10);
-}
-      end;
-
-    function getexplicitregisterint(r : tregister) : tregister;
-
-      begin
-{
-         if r in [R_ESI,R_EDI] then
-           begin
-             exprasmlist^.concat(new(pairegalloc,alloc(r)));
-             getexplicitregister32 := r;
-             exit;
-           end;
-         if r in unused then
-           begin
-              dec(usablereg32);
-              unused:=unused-[r];
-              usedinproc:=usedinproc or ($80 shr byte(r));
-              exprasmlist^.concat(new(pairegalloc,alloc(r)));
-              getexplicitregister32:=r;
-           end
-         else
-           getexplicitregister32:=getregister32;
-}
-      end;
-
-    procedure cleartempgen;
-
-      begin
-         unused:=usableregs;
-         countusableregint:=c_countusableregsint;
-         countusableregfpu:=c_countusableregsfpu;
-         countusableregqp:=c_countusableregsqp;
-      end;
-
-
-   procedure clearregistercount;
-      var
-        regi : tregister;
-      begin
-{
-         for regi:=R_EAX to R_EDI do
-           begin
-              reg_pushes[regi]:=0;
-              is_reg_var[regi]:=false;
-           end;
-}
-      end;
-
-   procedure resetusableregisters;
-      begin
-{
-        usableregs:=[R_EAX,R_EBX,R_ECX,R_EDX];
-        c_usableregs:=4;
-}
-      end;
-
-begin
-  resetusableregisters;
-end.
-{
-  $Log$
-  Revision 1.3  2002-05-16 19:46:52  carl
-  + defines.inc -> fpcdefs.inc to avoid conflicts if compiling by hand
-  + try to fix temp allocation (still in ifdef)
-  + generic constructor calls
-  + start of tassembler / tmodulebase class cleanup
-
-  Revision 1.2  2002/04/20 21:38:45  carl
-  * renamed some constants
-
-  Revision 1.1  2000/12/31 16:54:19  florian
-    + initial revision
-
-}