gcc/ada/exp_vfpt.ads

   1 ------------------------------------------------------------------------------
   2 --                                                                          --
   3 --                         GNAT COMPILER COMPONENTS                         --
   4 --                                                                          --
   5 --                             E X P _ V F P T                              --
   6 --                                                                          --
   7 --                                 S p e c                                  --
   8 --                                                                          --
   9 --          Copyright (C) 1992-2012, 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.  See the GNU General Public License --
  17 -- for  more details.  You should have  received  a copy of the GNU General --
  18 -- Public License  distributed with GNAT; see file COPYING3.  If not, go to --
  19 -- http://www.gnu.org/licenses for a complete copy of the license.          --
  20 --                                                                          --
  21 -- GNAT was originally developed  by the GNAT team at  New York University. --
  22 -- Extensive contributions were provided by Ada Core Technologies Inc.      --
  23 --                                                                          --
  24 ------------------------------------------------------------------------------
  25
  26 --  This package contains specialized routines for handling the expansion
  27 --  of arithmetic and conversion operations involving Vax format floating-
  28 --  point formats as used on the Vax and the Alpha and the ia64.
  29
  30 with Types; use Types;
  31 with Uintp; use Uintp;
  32
  33 package Exp_VFpt is
  34
  35    procedure Expand_Vax_Arith (N : Node_Id);
  36    --  The node N is an arithmetic node (N_Op_Abs, N_Op_Add, N_Op_Sub,
  37    --  N_Op_Div, N_Op_Mul, N_Op_Minus where the operands are in Vax float
  38    --  format. This procedure expands the necessary call.
  39
  40    procedure Expand_Vax_Comparison (N : Node_Id);
  41    --  The node N is an arithmetic comparison node where the types to be
  42    --  compared are in Vax float format. This procedure expands the necessary
  43    --  call.
  44
  45    procedure Expand_Vax_Conversion (N : Node_Id);
  46    --  The node N is a type conversion node where either the source or the
  47    --  target type, or both, are Vax floating-point type.
  48
  49    procedure Expand_Vax_Foreign_Return (N : Node_Id);
  50    --  The node N is a call to a foreign function that returns a Vax float
  51    --  value in a floating point register. Wraps the call in an asm stub
  52    --  that moves the return value to an integer location on Alpha/VMS,
  53    --  noop everywhere else.
  54
  55    function Get_Vax_Real_Literal_As_Signed (N : Node_Id) return Uint;
  56    --  Get the Vax binary representation of a real literal whose type is a Vax
  57    --  floating-point type. This is used by gigi. Previously we expanded real
  58    --  literal to a call to a LIB$OTS routine that performed the conversion.
  59    --  This worked correctly from a funcional point of view, but was
  60    --  inefficient and generated huge functions for aggregate initializations.
  61
  62    procedure Expand_Vax_Valid (N : Node_Id);
  63    --  The node N is an attribute reference node for the Valid attribute where
  64    --  the prefix is of a Vax floating-point type. This procedure expands the
  65    --  necessary call for the validity test.
  66
  67 end Exp_VFpt;