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Diffstat (limited to 'gcc-4.4.0/gcc/ada/s-unstyp.ads')
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diff --git a/gcc-4.4.0/gcc/ada/s-unstyp.ads b/gcc-4.4.0/gcc/ada/s-unstyp.ads new file mode 100644 index 000000000..bbd916a2c --- /dev/null +++ b/gcc-4.4.0/gcc/ada/s-unstyp.ads @@ -0,0 +1,210 @@ +------------------------------------------------------------------------------ +-- -- +-- GNAT RUN-TIME COMPONENTS -- +-- -- +-- S Y S T E M . U N S I G N E D _ T Y P E S -- +-- -- +-- S p e c -- +-- -- +-- Copyright (C) 1992-2009, Free Software Foundation, Inc. -- +-- -- +-- GNAT is free software; you can redistribute it and/or modify it under -- +-- terms of the GNU General Public License as published by the Free Soft- -- +-- ware Foundation; either version 3, or (at your option) any later ver- -- +-- sion. GNAT is distributed in the hope that it will be useful, but WITH- -- +-- OUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY -- +-- or FITNESS FOR A PARTICULAR PURPOSE. -- +-- -- +-- As a special exception under Section 7 of GPL version 3, you are granted -- +-- additional permissions described in the GCC Runtime Library Exception, -- +-- version 3.1, as published by the Free Software Foundation. -- +-- -- +-- You should have received a copy of the GNU General Public License and -- +-- a copy of the GCC Runtime Library Exception along with this program; -- +-- see the files COPYING3 and COPYING.RUNTIME respectively. If not, see -- +-- <http://www.gnu.org/licenses/>. -- +-- -- +-- GNAT was originally developed by the GNAT team at New York University. -- +-- Extensive contributions were provided by Ada Core Technologies Inc. -- +-- -- +------------------------------------------------------------------------------ + +-- This package contains definitions of standard unsigned types that +-- correspond in size to the standard signed types declared in Standard, +-- and (unlike the types in Interfaces) have corresponding names. It +-- also contains some related definitions for other specialized types +-- used by the compiler in connection with packed array types. + +pragma Warnings (Off); +pragma Compiler_Unit; +pragma Warnings (On); + +package System.Unsigned_Types is + pragma Pure; + + type Short_Short_Unsigned is mod 2 ** Short_Short_Integer'Size; + type Short_Unsigned is mod 2 ** Short_Integer'Size; + type Unsigned is mod 2 ** Integer'Size; + type Long_Unsigned is mod 2 ** Long_Integer'Size; + type Long_Long_Unsigned is mod 2 ** Long_Long_Integer'Size; + + type Float_Unsigned is mod 2 ** Float'Size; + -- Used in the implementation of Is_Negative intrinsic (see Exp_Intr) + + type Packed_Byte is mod 2 ** 8; + for Packed_Byte'Size use 8; + -- Component type for Packed_Bytes array + + type Packed_Bytes1 is array (Natural range <>) of Packed_Byte; + for Packed_Bytes1'Alignment use 1; + for Packed_Bytes1'Component_Size use Packed_Byte'Size; + -- This is the type used to implement packed arrays where no alignment + -- is required. This includes the cases of 1,2,4 (where we use direct + -- masking operations), and all odd component sizes (where the clusters + -- are not aligned anyway, see, e.g. System.Pack_07 in file s-pack07 + -- for details. + + type Packed_Bytes2 is new Packed_Bytes1; + for Packed_Bytes2'Alignment use Integer'Min (2, Standard'Maximum_Alignment); + -- This is the type used to implement packed arrays where an alignment + -- of 2 (is possible) is helpful for maximum efficiency of the get and + -- set routines in the corresponding library unit. This is true of all + -- component sizes that are even but not divisible by 4 (other than 2 for + -- which we use direct masking operations). In such cases, the clusters + -- can be assumed to be 2-byte aligned if the array is aligned. See for + -- example System.Pack_10 in file s-pack10). + + type Packed_Bytes4 is new Packed_Bytes1; + for Packed_Bytes4'Alignment use Integer'Min (4, Standard'Maximum_Alignment); + -- This is the type used to implement packed arrays where an alignment + -- of 4 (if possible) is helpful for maximum efficiency of the get and + -- set routines in the corresponding library unit. This is true of all + -- component sizes that are divisible by 4 (other than powers of 2, which + -- are either handled by direct masking or not packed at all). In such + -- cases the clusters can be assumed to be 4-byte aligned if the array + -- is aligned (see System.Pack_12 in file s-pack12 as an example). + + type Bits_1 is mod 2**1; + type Bits_2 is mod 2**2; + type Bits_4 is mod 2**4; + -- Types used for packed array conversions + + subtype Bytes_F is Packed_Bytes4 (1 .. Float'Size / 8); + -- Type used in implementation of Is_Negative intrinsic (see Exp_Intr) + + function Shift_Left + (Value : Short_Short_Unsigned; + Amount : Natural) return Short_Short_Unsigned; + + function Shift_Right + (Value : Short_Short_Unsigned; + Amount : Natural) return Short_Short_Unsigned; + + function Shift_Right_Arithmetic + (Value : Short_Short_Unsigned; + Amount : Natural) return Short_Short_Unsigned; + + function Rotate_Left + (Value : Short_Short_Unsigned; + Amount : Natural) return Short_Short_Unsigned; + + function Rotate_Right + (Value : Short_Short_Unsigned; + Amount : Natural) return Short_Short_Unsigned; + + function Shift_Left + (Value : Short_Unsigned; + Amount : Natural) return Short_Unsigned; + + function Shift_Right + (Value : Short_Unsigned; + Amount : Natural) return Short_Unsigned; + + function Shift_Right_Arithmetic + (Value : Short_Unsigned; + Amount : Natural) return Short_Unsigned; + + function Rotate_Left + (Value : Short_Unsigned; + Amount : Natural) return Short_Unsigned; + + function Rotate_Right + (Value : Short_Unsigned; + Amount : Natural) return Short_Unsigned; + + function Shift_Left + (Value : Unsigned; + Amount : Natural) return Unsigned; + + function Shift_Right + (Value : Unsigned; + Amount : Natural) return Unsigned; + + function Shift_Right_Arithmetic + (Value : Unsigned; + Amount : Natural) return Unsigned; + + function Rotate_Left + (Value : Unsigned; + Amount : Natural) return Unsigned; + + function Rotate_Right + (Value : Unsigned; + Amount : Natural) return Unsigned; + + function Shift_Left + (Value : Long_Unsigned; + Amount : Natural) return Long_Unsigned; + + function Shift_Right + (Value : Long_Unsigned; + Amount : Natural) return Long_Unsigned; + + function Shift_Right_Arithmetic + (Value : Long_Unsigned; + Amount : Natural) return Long_Unsigned; + + function Rotate_Left + (Value : Long_Unsigned; + Amount : Natural) return Long_Unsigned; + + function Rotate_Right + (Value : Long_Unsigned; + Amount : Natural) return Long_Unsigned; + + function Shift_Left + (Value : Long_Long_Unsigned; + Amount : Natural) return Long_Long_Unsigned; + + function Shift_Right + (Value : Long_Long_Unsigned; + Amount : Natural) return Long_Long_Unsigned; + + function Shift_Right_Arithmetic + (Value : Long_Long_Unsigned; + Amount : Natural) return Long_Long_Unsigned; + + function Rotate_Left + (Value : Long_Long_Unsigned; + Amount : Natural) return Long_Long_Unsigned; + + function Rotate_Right + (Value : Long_Long_Unsigned; + Amount : Natural) return Long_Long_Unsigned; + + pragma Import (Intrinsic, Shift_Left); + pragma Import (Intrinsic, Shift_Right); + pragma Import (Intrinsic, Shift_Right_Arithmetic); + pragma Import (Intrinsic, Rotate_Left); + pragma Import (Intrinsic, Rotate_Right); + + -- The following definitions are obsolescent. They were needed by the + -- previous version of the compiler and runtime, but are not needed + -- by the current version. We retain them to help with bootstrap path + -- problems. Also they seem harmless, and if any user programs have + -- been (rather improperly) using these types, why discombobulate them? + + subtype Packed_Bytes is Packed_Bytes4; + subtype Packed_Bytes_Unaligned is Packed_Bytes1; + +end System.Unsigned_Types; |