gcc/ada/libgnat/s-maccod.ads

   1 ------------------------------------------------------------------------------
   2 --                                                                          --
   3 --                         GNAT COMPILER COMPONENTS                         --
   4 --                                                                          --
   5 --                   S Y S T E M . M A C H I N E _ C O D E                  --
   6 --                                                                          --
   7 --                                 S p e c                                  --
   8 --                                                                          --
   9 --          Copyright (C) 1992-2017, Free Software Foundation, Inc.         --
  10 --                                                                          --
  11 -- GNAT is free software;  you can  redistribute it  and/or modify it under --
  12 -- terms of the  GNU General Public License as published  by the Free Soft- --
  13 -- ware  Foundation;  either version 3,  or (at your option) any later ver- --
  14 -- sion.  GNAT is distributed in the hope that it will be useful, but WITH- --
  15 -- OUT ANY WARRANTY;  without even the  implied warranty of MERCHANTABILITY --
  16 -- or FITNESS FOR A PARTICULAR PURPOSE.                                     --
  17 --                                                                          --
  18 -- As a special exception under Section 7 of GPL version 3, you are granted --
  19 -- additional permissions described in the GCC Runtime Library Exception,   --
  20 -- version 3.1, as published by the Free Software Foundation.               --
  21 --                                                                          --
  22 -- You should have received a copy of the GNU General Public License and    --
  23 -- a copy of the GCC Runtime Library Exception along with this program;     --
  24 -- see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see    --
  25 -- <http://www.gnu.org/licenses/>.                                          --
  26 --                                                                          --
  27 -- GNAT was originally developed  by the GNAT team at  New York University. --
  28 -- Extensive contributions were provided by Ada Core Technologies Inc.      --
  29 --                                                                          --
  30 ------------------------------------------------------------------------------
  31
  32 --  This package provides machine code support, both for intrinsic machine
  33 --  operations, and also for machine code statements. See GNAT documentation
  34 --  for full details.
  35
  36 package System.Machine_Code is
  37    pragma No_Elaboration_Code_All;
  38    pragma Pure;
  39
  40    --  All identifiers in this unit are implementation defined
  41
  42    pragma Implementation_Defined;
  43
  44    type Asm_Input_Operand  is private;
  45    type Asm_Output_Operand is private;
  46    --  These types are never used directly, they are declared only so that
  47    --  the calls to Asm are type correct according to Ada semantic rules.
  48
  49    No_Input_Operands  : constant Asm_Input_Operand;
  50    No_Output_Operands : constant Asm_Output_Operand;
  51
  52    type Asm_Input_Operand_List  is
  53      array (Integer range <>) of Asm_Input_Operand;
  54
  55    type Asm_Output_Operand_List is
  56      array (Integer range <>) of Asm_Output_Operand;
  57
  58    type Asm_Insn is private;
  59    --  This type is not used directly. It is declared only so that the
  60    --  aggregates used in code statements are type correct by Ada rules.
  61
  62    procedure Asm (
  63      Template : String;
  64      Outputs  : Asm_Output_Operand_List;
  65      Inputs   : Asm_Input_Operand_List;
  66      Clobber  : String  := "";
  67      Volatile : Boolean := False);
  68
  69    procedure Asm (
  70      Template : String;
  71      Outputs  : Asm_Output_Operand := No_Output_Operands;
  72      Inputs   : Asm_Input_Operand_List;
  73      Clobber  : String  := "";
  74      Volatile : Boolean := False);
  75
  76    procedure Asm (
  77      Template : String;
  78      Outputs  : Asm_Output_Operand_List;
  79      Inputs   : Asm_Input_Operand := No_Input_Operands;
  80      Clobber  : String  := "";
  81      Volatile : Boolean := False);
  82
  83    procedure Asm (
  84      Template : String;
  85      Outputs  : Asm_Output_Operand := No_Output_Operands;
  86      Inputs   : Asm_Input_Operand  := No_Input_Operands;
  87      Clobber  : String  := "";
  88      Volatile : Boolean := False);
  89
  90    function Asm (
  91      Template : String;
  92      Outputs  : Asm_Output_Operand_List;
  93      Inputs   : Asm_Input_Operand_List;
  94      Clobber  : String  := "";
  95      Volatile : Boolean := False) return Asm_Insn;
  96
  97    function Asm (
  98      Template : String;
  99      Outputs  : Asm_Output_Operand := No_Output_Operands;
 100      Inputs   : Asm_Input_Operand_List;
 101      Clobber  : String  := "";
 102      Volatile : Boolean := False) return Asm_Insn;
 103
 104    function Asm (
 105      Template : String;
 106      Outputs  : Asm_Output_Operand_List;
 107      Inputs   : Asm_Input_Operand := No_Input_Operands;
 108      Clobber  : String  := "";
 109      Volatile : Boolean := False) return Asm_Insn;
 110
 111    function Asm (
 112      Template : String;
 113      Outputs  : Asm_Output_Operand := No_Output_Operands;
 114      Inputs   : Asm_Input_Operand  := No_Input_Operands;
 115      Clobber  : String  := "";
 116      Volatile : Boolean := False) return Asm_Insn;
 117
 118    pragma Import (Intrinsic, Asm);
 119
 120 private
 121
 122    type Asm_Input_Operand  is new Integer;
 123    type Asm_Output_Operand is new Integer;
 124    type Asm_Insn           is new Integer;
 125    --  All three of these types are dummy types, to meet the requirements of
 126    --  type consistency. No values of these types are ever referenced.
 127
 128    No_Input_Operands  : constant Asm_Input_Operand  := 0;
 129    No_Output_Operands : constant Asm_Output_Operand := 0;
 130
 131 end System.Machine_Code;