diff options
Diffstat (limited to 'gcc-4.8/gcc/ada/s-bignum.ads')
| -rw-r--r-- | gcc-4.8/gcc/ada/s-bignum.ads | 116 |
1 files changed, 0 insertions, 116 deletions
diff --git a/gcc-4.8/gcc/ada/s-bignum.ads b/gcc-4.8/gcc/ada/s-bignum.ads deleted file mode 100644 index 7cc752688..000000000 --- a/gcc-4.8/gcc/ada/s-bignum.ads +++ /dev/null @@ -1,116 +0,0 @@ ------------------------------------------------------------------------------- --- -- --- GNAT COMPILER COMPONENTS -- --- -- --- S Y S T E M . B I G N U M S -- --- -- --- S p e c -- --- -- --- Copyright (C) 2012, 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 provides arbitrary precision signed integer arithmetic for --- use in computing intermediate values in expressions for the case where --- pragma Overflow_Check (Eliminated) is in effect. - -with Interfaces; - -package System.Bignums is - - pragma Assert (Long_Long_Integer'Size = 64); - -- This package assumes that Long_Long_Integer size is 64 bit (i.e. that it - -- has a range of -2**63 to 2**63-1). The front end ensures that the mode - -- ELIMINATED is not allowed for overflow checking if this is not the case. - - subtype Length is Natural range 0 .. 2 ** 23 - 1; - -- Represent number of words in Digit_Vector - - Base : constant := 2 ** 32; - -- Digit vectors use this base - - subtype SD is Interfaces.Unsigned_32; - -- Single length digit - - type Digit_Vector is array (Length range <>) of SD; - -- Represent digits of a number (most significant digit first) - - type Bignum_Data (Len : Length) is record - Neg : Boolean; - -- Set if value is negative, never set for zero - - D : Digit_Vector (1 .. Len); - -- Digits of number, most significant first, represented in base - -- 2**Base. No leading zeroes are stored, and the value of zero is - -- represented using an empty vector for D. - end record; - - for Bignum_Data use record - Len at 0 range 0 .. 23; - Neg at 3 range 0 .. 7; - end record; - - type Bignum is access all Bignum_Data; - -- This is the type that is used externally. Possibly this could be a - -- private type, but we leave the structure exposed for now. For one - -- thing it helps with debugging. Note that this package never shares - -- an allocated Bignum value, so for example for X + 0, a copy of X is - -- returned, not X itself. - - -- Note: none of the subprograms in this package modify the Bignum_Data - -- records referenced by Bignum arguments of mode IN. - - function Big_Add (X, Y : Bignum) return Bignum; -- "+" - function Big_Sub (X, Y : Bignum) return Bignum; -- "-" - function Big_Mul (X, Y : Bignum) return Bignum; -- "*" - function Big_Div (X, Y : Bignum) return Bignum; -- "/" - function Big_Exp (X, Y : Bignum) return Bignum; -- "**" - function Big_Mod (X, Y : Bignum) return Bignum; -- "mod" - function Big_Rem (X, Y : Bignum) return Bignum; -- "rem" - function Big_Neg (X : Bignum) return Bignum; -- "-" - function Big_Abs (X : Bignum) return Bignum; -- "abs" - -- Perform indicated arithmetic operation on bignum values. No exception - -- raised except for Div/Mod/Rem by 0 which raises Constraint_Error with - -- an appropriate message. - - function Big_EQ (X, Y : Bignum) return Boolean; -- "=" - function Big_NE (X, Y : Bignum) return Boolean; -- "/=" - function Big_GE (X, Y : Bignum) return Boolean; -- ">=" - function Big_LE (X, Y : Bignum) return Boolean; -- "<=" - function Big_GT (X, Y : Bignum) return Boolean; -- ">" - function Big_LT (X, Y : Bignum) return Boolean; -- "<" - -- Perform indicated comparison on bignums, returning result as Boolean. - -- No exception raised for any input arguments. - - function Bignum_In_LLI_Range (X : Bignum) return Boolean; - -- Returns True if the Bignum value is in the range of Long_Long_Integer, - -- so that a call to From_Bignum is guaranteed not to raise an exception. - - function To_Bignum (X : Long_Long_Integer) return Bignum; - -- Convert Long_Long_Integer to Bignum. No exception can be raised for any - -- input argument. - - function From_Bignum (X : Bignum) return Long_Long_Integer; - -- Convert Bignum to Long_Long_Integer. Constraint_Error raised with - -- appropriate message if value is out of range of Long_Long_Integer. - -end System.Bignums; |