1 ------------------------------------------------------------------------------
3 -- GNAT COMPILER COMPONENTS --
5 -- I N T E R F A C E S --
10 -- This specification is adapted from the Ada Reference Manual for use with --
11 -- GNAT. In accordance with the copyright of that document, you can freely --
12 -- copy and modify this specification, provided that if you redistribute a --
13 -- modified version, any changes that you have made are clearly indicated. --
15 ------------------------------------------------------------------------------
17 -- Assumes integer sizes of 8, 16, 32 and 64 are available, and that the
18 -- floating-point formats are IEEE compatible.
20 -- There is a specialized version of this package for OpenVMS.
23 pragma Pure (Interfaces);
25 type Integer_8 is range -2 ** 7 .. 2 ** 7 - 1;
26 for Integer_8'Size use 8;
28 type Integer_16 is range -2 ** 15 .. 2 ** 15 - 1;
29 for Integer_16'Size use 16;
31 type Integer_32 is range -2 ** 31 .. 2 ** 31 - 1;
32 for Integer_32'Size use 32;
34 type Integer_64 is range -2 ** 63 .. 2 ** 63 - 1;
35 for Integer_64'Size use 64;
37 type Unsigned_8 is mod 2 ** 8;
38 for Unsigned_8'Size use 8;
40 type Unsigned_16 is mod 2 ** 16;
41 for Unsigned_16'Size use 16;
43 type Unsigned_32 is mod 2 ** 32;
44 for Unsigned_32'Size use 32;
46 type Unsigned_64 is mod 2 ** 64;
47 for Unsigned_64'Size use 64;
59 function Shift_Right_Arithmetic
84 function Shift_Right_Arithmetic
100 (Value : Unsigned_32;
105 (Value : Unsigned_32;
109 function Shift_Right_Arithmetic
110 (Value : Unsigned_32;
115 (Value : Unsigned_32;
119 function Rotate_Right
120 (Value : Unsigned_32;
125 (Value : Unsigned_64;
130 (Value : Unsigned_64;
134 function Shift_Right_Arithmetic
135 (Value : Unsigned_64;
140 (Value : Unsigned_64;
144 function Rotate_Right
145 (Value : Unsigned_64;
149 pragma Import (Intrinsic, Shift_Left);
150 pragma Import (Intrinsic, Shift_Right);
151 pragma Import (Intrinsic, Shift_Right_Arithmetic);
152 pragma Import (Intrinsic, Rotate_Left);
153 pragma Import (Intrinsic, Rotate_Right);
155 -- Floating point types. We assume that we are on an IEEE machine, and
156 -- that the types Short_Float and Long_Float in Standard refer to the
157 -- 32-bit short and 64-bit long IEEE forms. Furthermore, if there is
158 -- an extended float, we assume that it is available as Long_Long_Float.
159 -- Note: it is harmless, and explicitly permitted, to include additional
160 -- types in interfaces, so it is not wrong to have IEEE_Extended_Float
161 -- defined even if the extended format is not available.
163 type IEEE_Float_32 is new Short_Float;
164 type IEEE_Float_64 is new Long_Float;
165 type IEEE_Extended_Float is new Long_Long_Float;