From 554fd8c5195424bdbcabf5de30fdc183aba391bd Mon Sep 17 00:00:00 2001 From: upstream source tree Date: Sun, 15 Mar 2015 20:14:05 -0400 Subject: obtained gcc-4.6.4.tar.bz2 from upstream website; verified gcc-4.6.4.tar.bz2.sig; imported gcc-4.6.4 source tree from verified upstream tarball. downloading a git-generated archive based on the 'upstream' tag should provide you with a source tree that is binary identical to the one extracted from the above tarball. if you have obtained the source via the command 'git clone', however, do note that line-endings of files in your working directory might differ from line-endings of the respective files in the upstream repository. --- gcc/ada/s-veboop.adb | 125 +++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 125 insertions(+) create mode 100644 gcc/ada/s-veboop.adb (limited to 'gcc/ada/s-veboop.adb') diff --git a/gcc/ada/s-veboop.adb b/gcc/ada/s-veboop.adb new file mode 100644 index 000000000..dea318abb --- /dev/null +++ b/gcc/ada/s-veboop.adb @@ -0,0 +1,125 @@ +------------------------------------------------------------------------------ +-- -- +-- GNAT RUN-TIME LIBRARY (GNARL) COMPONENTS -- +-- -- +-- S Y S T E M . V E C T O R S . B O O L E A N _ O P E R A T I O N S -- +-- -- +-- B o d y -- +-- -- +-- Copyright (C) 2002-2009, 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 -- +-- . -- +-- -- +-- GNAT was originally developed by the GNAT team at New York University. -- +-- Extensive contributions were provided by Ada Core Technologies Inc. -- +-- -- +------------------------------------------------------------------------------ + +package body System.Vectors.Boolean_Operations is + + SU : constant := Storage_Unit; + -- Convenient short hand, used throughout + + -- The coding of this unit depends on the fact that the Component_Size + -- of a normally declared array of Boolean is equal to Storage_Unit. We + -- can't use the Component_Size directly since it is non-static. The + -- following declaration checks that this declaration is correct + + type Boolean_Array is array (Integer range <>) of Boolean; + pragma Compile_Time_Error + (Boolean_Array'Component_Size /= SU, "run time compile failure"); + + -- NOTE: The boolean literals must be qualified here to avoid visibility + -- anomalies when this package is compiled through Rtsfind, in a context + -- that includes a user-defined type derived from boolean. + + True_Val : constant Vector := Standard.True'Enum_Rep + + Standard.True'Enum_Rep * 2**SU + + Standard.True'Enum_Rep * 2**(SU * 2) + + Standard.True'Enum_Rep * 2**(SU * 3) + + Standard.True'Enum_Rep * 2**(SU * 4) + + Standard.True'Enum_Rep * 2**(SU * 5) + + Standard.True'Enum_Rep * 2**(SU * 6) + + Standard.True'Enum_Rep * 2**(SU * 7); + -- This constant represents the bits to be flipped to perform a logical + -- "not" on a vector of booleans, independent of the actual + -- representation of True. + + -- The representations of (False, True) are assumed to be zero/one and + -- the maximum number of unpacked booleans per Vector is assumed to be 8. + + pragma Assert (Standard.False'Enum_Rep = 0); + pragma Assert (Standard.True'Enum_Rep = 1); + pragma Assert (Vector'Size / Storage_Unit <= 8); + + -- The reason we need to do these gymnastics is that no call to + -- Unchecked_Conversion can be made at the library level since this + -- unit is pure. Also a conversion from the array type to the Vector type + -- inside the body of "not" is inefficient because of alignment issues. + + ----------- + -- "not" -- + ----------- + + function "not" (Item : Vectors.Vector) return Vectors.Vector is + begin + return Item xor True_Val; + end "not"; + + ---------- + -- Nand -- + ---------- + + function Nand (Left, Right : Boolean) return Boolean is + begin + return not (Left and Right); + end Nand; + + function Nand (Left, Right : Vectors.Vector) return Vectors.Vector is + begin + return not (Left and Right); + end Nand; + + --------- + -- Nor -- + --------- + + function Nor (Left, Right : Boolean) return Boolean is + begin + return not (Left or Right); + end Nor; + + function Nor (Left, Right : Vectors.Vector) return Vectors.Vector is + begin + return not (Left or Right); + end Nor; + + ---------- + -- Nxor -- + ---------- + + function Nxor (Left, Right : Boolean) return Boolean is + begin + return not (Left xor Right); + end Nxor; + + function Nxor (Left, Right : Vectors.Vector) return Vectors.Vector is + begin + return not (Left xor Right); + end Nxor; + +end System.Vectors.Boolean_Operations; -- cgit v1.2.3