1------------------------------------------------------------------------------ 2-- -- 3-- GNAT COMPILER COMPONENTS -- 4-- -- 5-- S Y S T E M . V A X _ F L O A T _ O P E R A T I O N S -- 6-- -- 7-- S p e c -- 8-- -- 9-- Copyright (C) 1997-1998 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 2, 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 COPYING. If not, write -- 19-- to the Free Software Foundation, 59 Temple Place - Suite 330, Boston, -- 20-- MA 02111-1307, USA. -- 21-- -- 22-- As a special exception, if other files instantiate generics from this -- 23-- unit, or you link this unit with other files to produce an executable, -- 24-- this unit does not by itself cause the resulting executable to be -- 25-- covered by the GNU General Public License. This exception does not -- 26-- however invalidate any other reasons why the executable file might be -- 27-- covered by the GNU Public License. -- 28-- -- 29-- GNAT was originally developed by the GNAT team at New York University. -- 30-- Extensive contributions were provided by Ada Core Technologies Inc. -- 31-- -- 32------------------------------------------------------------------------------ 33 34-- This package contains runtime routines for handling the non-IEEE 35-- floating-point formats used on the Vax and the Alpha. 36 37package System.Vax_Float_Operations is 38 39 pragma Warnings (Off); 40 -- Suppress warnings if not on Alpha/VAX 41 42 type D is digits 9; 43 pragma Float_Representation (VAX_Float, D); 44 -- D Float type on Vax 45 46 type G is digits 15; 47 pragma Float_Representation (VAX_Float, G); 48 -- G Float type on Vax 49 50 type F is digits 6; 51 pragma Float_Representation (VAX_Float, F); 52 -- F Float type on Vax 53 54 type S is digits 6; 55 pragma Float_Representation (IEEE_Float, S); 56 -- IEEE short 57 58 type T is digits 15; 59 pragma Float_Representation (IEEE_Float, T); 60 -- IEEE long 61 62 pragma Warnings (On); 63 64 type Q is range -2 ** 63 .. +(2 ** 63 - 1); 65 -- 64-bit signed integer 66 67 -------------------------- 68 -- Conversion Functions -- 69 -------------------------- 70 71 function D_To_G (X : D) return G; 72 function G_To_D (X : G) return D; 73 -- Conversions between D float and G float 74 75 function G_To_F (X : G) return F; 76 function F_To_G (X : F) return G; 77 -- Conversions between F float and G float 78 79 function F_To_S (X : F) return S; 80 function S_To_F (X : S) return F; 81 -- Conversions between F float and IEEE short 82 83 function G_To_T (X : G) return T; 84 function T_To_G (X : T) return G; 85 -- Conversions between G float and IEEE long 86 87 function F_To_Q (X : F) return Q; 88 function Q_To_F (X : Q) return F; 89 -- Conversions between F float and 64-bit integer 90 91 function G_To_Q (X : G) return Q; 92 function Q_To_G (X : Q) return G; 93 -- Conversions between G float and 64-bit integer 94 95 function T_To_D (X : T) return D; 96 -- Conversion from IEEE long to D_Float (used for literals) 97 98 -------------------------- 99 -- Arithmetic Functions -- 100 -------------------------- 101 102 function Abs_F (X : F) return F; 103 function Abs_G (X : G) return G; 104 -- Absolute value of F/G float 105 106 function Add_F (X, Y : F) return F; 107 function Add_G (X, Y : G) return G; 108 -- Addition of F/G float 109 110 function Div_F (X, Y : F) return F; 111 function Div_G (X, Y : G) return G; 112 -- Division of F/G float 113 114 function Mul_F (X, Y : F) return F; 115 function Mul_G (X, Y : G) return G; 116 -- Multiplication of F/G float 117 118 function Neg_F (X : F) return F; 119 function Neg_G (X : G) return G; 120 -- Negation of F/G float 121 122 function Sub_F (X, Y : F) return F; 123 function Sub_G (X, Y : G) return G; 124 -- Subtraction of F/G float 125 126 -------------------------- 127 -- Comparison Functions -- 128 -------------------------- 129 130 function Eq_F (X, Y : F) return Boolean; 131 function Eq_G (X, Y : G) return Boolean; 132 -- Compares for X = Y 133 134 function Le_F (X, Y : F) return Boolean; 135 function Le_G (X, Y : G) return Boolean; 136 -- Compares for X <= Y 137 138 function Lt_F (X, Y : F) return Boolean; 139 function Lt_G (X, Y : G) return Boolean; 140 -- Compares for X < Y 141 142 ---------------------- 143 -- Debug Procedures -- 144 ---------------------- 145 146 procedure Debug_Output_D (Arg : D); 147 procedure Debug_Output_F (Arg : F); 148 procedure Debug_Output_G (Arg : G); 149 pragma Export (Ada, Debug_Output_D); 150 pragma Export (Ada, Debug_Output_F); 151 pragma Export (Ada, Debug_Output_G); 152 -- These routines output their argument in decimal string form, with 153 -- no terminating line return. They are provided for implicit use by 154 -- the pre gnat-3.12w GDB, and are retained for backwards compatibility. 155 156 function Debug_String_D (Arg : D) return System.Address; 157 function Debug_String_F (Arg : F) return System.Address; 158 function Debug_String_G (Arg : G) return System.Address; 159 pragma Export (Ada, Debug_String_D); 160 pragma Export (Ada, Debug_String_F); 161 pragma Export (Ada, Debug_String_G); 162 -- These routines return a decimal C string image of their argument. 163 -- They are provided for implicit use by the debugger, in response to 164 -- the special encoding used for Vax floating-point types (see Exp_Dbug 165 -- for details). They supercede the above Debug_Output_D/F/G routines 166 -- which didn't work properly with GDBTK. 167 168 procedure pd (Arg : D); 169 procedure pf (Arg : F); 170 procedure pg (Arg : G); 171 pragma Export (Ada, pd); 172 pragma Export (Ada, pf); 173 pragma Export (Ada, pg); 174 -- These are like the Debug_Output_D/F/G procedures except that they 175 -- output a line return after the output. They were originally present 176 -- for direct use in GDB before GDB recognized Vax floating-point 177 -- types, and are retained for backwards compatibility. 178 179private 180 pragma Inline (D_To_G); 181 pragma Inline (F_To_G); 182 pragma Inline (F_To_Q); 183 pragma Inline (F_To_S); 184 pragma Inline (G_To_D); 185 pragma Inline (G_To_F); 186 pragma Inline (G_To_Q); 187 pragma Inline (G_To_T); 188 pragma Inline (Q_To_F); 189 pragma Inline (Q_To_G); 190 pragma Inline (S_To_F); 191 pragma Inline (T_To_G); 192 193 pragma Inline (Abs_F); 194 pragma Inline (Abs_G); 195 pragma Inline (Add_F); 196 pragma Inline (Add_G); 197 pragma Inline (Div_G); 198 pragma Inline (Div_F); 199 pragma Inline (Mul_F); 200 pragma Inline (Mul_G); 201 pragma Inline (Neg_G); 202 pragma Inline (Neg_F); 203 pragma Inline (Sub_F); 204 pragma Inline (Sub_G); 205 206 pragma Inline (Eq_F); 207 pragma Inline (Eq_G); 208 pragma Inline (Le_F); 209 pragma Inline (Le_G); 210 pragma Inline (Lt_F); 211 pragma Inline (Lt_G); 212 213end System.Vax_Float_Operations; 214