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| author | Tristan Gingold <tgingold@free.fr> | 2014-01-04 11:25:55 +0100 |
|---|---|---|
| committer | Tristan Gingold <tgingold@free.fr> | 2014-01-04 11:25:55 +0100 |
| commit | 8c778be42999972dcda1aac95999e0eb1a5e3e9c (patch) | |
| tree | c69189bc93c0bd562d6e6814aafb1dfc1fab2f32 /libraries/ieee2008/numeric_bit_unsigned.vhdl | |
| parent | 071b3291e88f05bc06d91fe4ebe88582292d3f0d (diff) | |
| download | ghdl-8c778be42999972dcda1aac95999e0eb1a5e3e9c.tar.gz ghdl-8c778be42999972dcda1aac95999e0eb1a5e3e9c.tar.bz2 ghdl-8c778be42999972dcda1aac95999e0eb1a5e3e9c.zip | |
Add ieee 2008 packages.
Diffstat (limited to 'libraries/ieee2008/numeric_bit_unsigned.vhdl')
| -rw-r--r-- | libraries/ieee2008/numeric_bit_unsigned.vhdl | 620 |
1 files changed, 620 insertions, 0 deletions
diff --git a/libraries/ieee2008/numeric_bit_unsigned.vhdl b/libraries/ieee2008/numeric_bit_unsigned.vhdl new file mode 100644 index 000000000..1d76ed477 --- /dev/null +++ b/libraries/ieee2008/numeric_bit_unsigned.vhdl @@ -0,0 +1,620 @@ +-- --------------------------------------------------------------------
+--
+-- Copyright © 2008 by IEEE. All rights reserved.
+--
+-- This source file is an essential part of IEEE Std 1076-2008,
+-- IEEE Standard VHDL Language Reference Manual. This source file may not be
+-- copied, sold, or included with software that is sold without written
+-- permission from the IEEE Standards Department. This source file may be
+-- copied for individual use between licensed users. This source file is
+-- provided on an AS IS basis. The IEEE disclaims ANY WARRANTY EXPRESS OR
+-- IMPLIED INCLUDING ANY WARRANTY OF MERCHANTABILITY AND FITNESS FOR USE
+-- FOR A PARTICULAR PURPOSE. The user of the source file shall indemnify
+-- and hold IEEE harmless from any damages or liability arising out of the
+-- use thereof.
+--
+-- Title : Standard VHDL Synthesis Packages
+-- : (NUMERIC_BIT_UNSIGNED package declaration)
+-- :
+-- Library : This package shall be compiled into a library
+-- : symbolically named IEEE.
+-- :
+-- Developers: Accellera VHDL-TC, and IEEE P1076 Working Group
+-- :
+-- Purpose : This package defines numeric types and arithmetic functions
+-- : for use with synthesis tools. Values of type BIT_VECTOR
+-- : are interpreted as unsigned numbers in vector form.
+-- : The leftmost bit is treated as the most significant bit.
+-- : This package contains overloaded arithmetic operators on
+-- : the BIT_VECTOR type. The package also contains
+-- : useful type conversions functions, clock detection
+-- : functions, and other utility functions.
+-- :
+-- : If any argument to a function is a null array, a null array
+-- : is returned (exceptions, if any, are noted individually).
+--
+-- Note : This package may be modified to include additional data
+-- : required by tools, but it must in no way change the
+-- : external interfaces or simulation behavior of the
+-- : description. It is permissible to add comments and/or
+-- : attributes to the package declarations, but not to change
+-- : or delete any original lines of the package declaration.
+-- : The package body may be changed only in accordance with
+-- : the terms of Clause 16 of this standard.
+-- :
+-- --------------------------------------------------------------------
+-- $Revision: 1220 $
+-- $Date: 2008-04-10 17:16:09 +0930 (Thu, 10 Apr 2008) $
+-- --------------------------------------------------------------------
+
+package NUMERIC_BIT_UNSIGNED is
+ constant CopyRightNotice : STRING :=
+ "Copyright 2008 IEEE. All rights reserved.";
+
+ -- Id: A.3
+ function "+" (L, R : BIT_VECTOR) return BIT_VECTOR;
+ -- Result subtype: bit_vector(MAXIMUM(L'LENGTH, R'LENGTH)-1 downto 0).
+ -- Result: Adds two UNSIGNED vectors that may be of different lengths.
+
+ -- Id: A.3R
+ function "+"(L : BIT_VECTOR; R : BIT) return BIT_VECTOR;
+ -- Result subtype: bit_vector(L'LENGTH-1 downto 0)
+ -- Result: Similar to A.3 where R is a one bit bit_vector
+
+ -- Id: A.3L
+ function "+"(L : BIT; R : BIT_VECTOR) return BIT_VECTOR;
+ -- Result subtype: bit_vector(R'LENGTH-1 downto 0)
+ -- Result: Similar to A.3 where L is a one bit UNSIGNED
+
+ -- Id: A.5
+ function "+" (L : BIT_VECTOR; R : NATURAL) return BIT_VECTOR;
+ -- Result subtype: bit_vector(L'LENGTH-1 downto 0).
+ -- Result: Adds an UNSIGNED vector, L, with a non-negative INTEGER, R.
+
+ -- Id: A.6
+ function "+" (L : NATURAL; R : BIT_VECTOR) return BIT_VECTOR;
+ -- Result subtype: bit_vector(R'LENGTH-1 downto 0).
+ -- Result: Adds a non-negative INTEGER, L, with an UNSIGNED vector, R.
+
+ --============================================================================
+
+ -- Id: A.9
+ function "-" (L, R : BIT_VECTOR) return BIT_VECTOR;
+ -- Result subtype: UNSIGNED(MAXIMUM(L'LENGTH, R'LENGTH)-1 downto 0).
+ -- Result: Subtracts two UNSIGNED vectors that may be of different lengths.
+
+ -- Id: A.9R
+ function "-"(L : BIT_VECTOR; R : BIT) return BIT_VECTOR;
+ -- Result subtype: bit_vector(L'LENGTH-1 downto 0)
+ -- Result: Similar to A.9 where R is a one bit UNSIGNED
+
+ -- Id: A.9L
+ function "-"(L : BIT; R : BIT_VECTOR) return BIT_VECTOR;
+ -- Result subtype: bit_vector(R'LENGTH-1 downto 0)
+ -- Result: Similar to A.9 where L is a one bit UNSIGNED
+
+ -- Id: A.11
+ function "-" (L : BIT_VECTOR; R : NATURAL) return BIT_VECTOR;
+ -- Result subtype: bit_vector(L'LENGTH-1 downto 0).
+ -- Result: Subtracts a non-negative INTEGER, R, from an UNSIGNED vector, L.
+
+ -- Id: A.12
+ function "-" (L : NATURAL; R : BIT_VECTOR) return BIT_VECTOR;
+ -- Result subtype: bit_vector(R'LENGTH-1 downto 0).
+ -- Result: Subtracts an UNSIGNED vector, R, from a non-negative INTEGER, L.
+
+ --============================================================================
+
+ -- Id: A.15
+ function "*" (L, R : BIT_VECTOR) return BIT_VECTOR;
+ -- Result subtype: bit_vector((L'LENGTH+R'LENGTH-1) downto 0).
+ -- Result: Performs the multiplication operation on two UNSIGNED vectors
+ -- that may possibly be of different lengths.
+
+ -- Id: A.17
+ function "*" (L : BIT_VECTOR; R : NATURAL) return BIT_VECTOR;
+ -- Result subtype: bit_vector((L'LENGTH+L'LENGTH-1) downto 0).
+ -- Result: Multiplies an UNSIGNED vector, L, with a non-negative
+ -- INTEGER, R. R is converted to an UNSIGNED vector of
+ -- SIZE L'LENGTH before multiplication.
+
+ -- Id: A.18
+ function "*" (L : NATURAL; R : BIT_VECTOR) return BIT_VECTOR;
+ -- Result subtype: bit_vector((R'LENGTH+R'LENGTH-1) downto 0).
+ -- Result: Multiplies an UNSIGNED vector, R, with a non-negative
+ -- INTEGER, L. L is converted to an UNSIGNED vector of
+ -- SIZE R'LENGTH before multiplication.
+
+ --============================================================================
+ --
+ -- NOTE: If second argument is zero for "/" operator, a severity level
+ -- of ERROR is issued.
+
+ -- Id: A.21
+ function "/" (L, R : BIT_VECTOR) return BIT_VECTOR;
+ -- Result subtype: bit_vector(L'LENGTH-1 downto 0)
+ -- Result: Divides an UNSIGNED vector, L, by another UNSIGNED vector, R.
+
+ -- Id: A.23
+ function "/" (L : BIT_VECTOR; R : NATURAL) return BIT_VECTOR;
+ -- Result subtype: bit_vector(L'LENGTH-1 downto 0)
+ -- Result: Divides an UNSIGNED vector, L, by a non-negative INTEGER, R.
+ -- If NO_OF_BITS(R) > L'LENGTH, result is truncated to L'LENGTH.
+
+ -- Id: A.24
+ function "/" (L : NATURAL; R : BIT_VECTOR) return BIT_VECTOR;
+ -- Result subtype: bit_vector(R'LENGTH-1 downto 0)
+ -- Result: Divides a non-negative INTEGER, L, by an UNSIGNED vector, R.
+ -- If NO_OF_BITS(L) > R'LENGTH, result is truncated to R'LENGTH.
+
+ --============================================================================
+ --
+ -- NOTE: If second argument is zero for "rem" operator, a severity level
+ -- of ERROR is issued.
+
+ -- Id: A.27
+ function "rem" (L, R : BIT_VECTOR) return BIT_VECTOR;
+ -- Result subtype: bit_vector(R'LENGTH-1 downto 0)
+ -- Result: Computes "L rem R" where L and R are UNSIGNED vectors.
+
+ -- Id: A.29
+ function "rem" (L : BIT_VECTOR; R : NATURAL) return BIT_VECTOR;
+ -- Result subtype: bit_vector(L'LENGTH-1 downto 0)
+ -- Result: Computes "L rem R" where L is an UNSIGNED vector and R is a
+ -- non-negative INTEGER.
+ -- If NO_OF_BITS(R) > L'LENGTH, result is truncated to L'LENGTH.
+
+ -- Id: A.30
+ function "rem" (L : NATURAL; R : BIT_VECTOR) return BIT_VECTOR;
+ -- Result subtype: bit_vector(R'LENGTH-1 downto 0)
+ -- Result: Computes "L rem R" where R is an UNSIGNED vector and L is a
+ -- non-negative INTEGER.
+ -- If NO_OF_BITS(L) > R'LENGTH, result is truncated to R'LENGTH.
+
+ --============================================================================
+ --
+ -- NOTE: If second argument is zero for "mod" operator, a severity level
+ -- of ERROR is issued.
+
+ -- Id: A.33
+ function "mod" (L, R : BIT_VECTOR) return BIT_VECTOR;
+ -- Result subtype: bit_vector(R'LENGTH-1 downto 0)
+ -- Result: Computes "L mod R" where L and R are UNSIGNED vectors.
+
+ -- Id: A.35
+ function "mod" (L : BIT_VECTOR; R : NATURAL) return BIT_VECTOR;
+ -- Result subtype: bit_vector(L'LENGTH-1 downto 0)
+ -- Result: Computes "L mod R" where L is an UNSIGNED vector and R
+ -- is a non-negative INTEGER.
+ -- If NO_OF_BITS(R) > L'LENGTH, result is truncated to L'LENGTH.
+
+ -- Id: A.36
+ function "mod" (L : NATURAL; R : BIT_VECTOR) return BIT_VECTOR;
+ -- Result subtype: bit_vector(R'LENGTH-1 downto 0)
+ -- Result: Computes "L mod R" where R is an UNSIGNED vector and L
+ -- is a non-negative INTEGER.
+ -- If NO_OF_BITS(L) > R'LENGTH, result is truncated to R'LENGTH.
+
+ --============================================================================
+ -- Id: A.39
+ function find_leftmost (ARG : BIT_VECTOR; Y : BIT) return INTEGER;
+ -- Result subtype: INTEGER
+ -- Result: Finds the leftmost occurrence of the value of Y in ARG.
+ -- Returns the index of the occurrence if it exists, or -1 otherwise.
+
+ -- Id: A.41
+ function find_rightmost (ARG : BIT_VECTOR; Y : BIT) return INTEGER;
+ -- Result subtype: INTEGER
+ -- Result: Finds the leftmost occurrence of the value of Y in ARG.
+ -- Returns the index of the occurrence if it exists, or -1 otherwise.
+
+ --============================================================================
+ -- Comparison Operators
+ --============================================================================
+ -- Id: C.1
+ function ">" (L, R : BIT_VECTOR) return BOOLEAN;
+ -- Result subtype: BOOLEAN
+ -- Result: Computes "L > R" where L and R are UNSIGNED vectors possibly
+ -- of different lengths.
+
+ -- Id: C.3
+ function ">" (L : NATURAL; R : BIT_VECTOR) return BOOLEAN;
+ -- Result subtype: BOOLEAN
+ -- Result: Computes "L > R" where L is a non-negative INTEGER and
+ -- R is an UNSIGNED vector.
+
+ -- Id: C.5
+ function ">" (L : BIT_VECTOR; R : NATURAL) return BOOLEAN;
+ -- Result subtype: BOOLEAN
+ -- Result: Computes "L > R" where L is an UNSIGNED vector and
+ -- R is a non-negative INTEGER.
+
+ --============================================================================
+ -- Id: C.7
+ function "<" (L, R : BIT_VECTOR) return BOOLEAN;
+ -- Result subtype: BOOLEAN
+ -- Result: Computes "L < R" where L and R are UNSIGNED vectors possibly
+ -- of different lengths.
+
+ -- Id: C.9
+ function "<" (L : NATURAL; R : BIT_VECTOR) return BOOLEAN;
+ -- Result subtype: BOOLEAN
+ -- Result: Computes "L < R" where L is a non-negative INTEGER and
+ -- R is an UNSIGNED vector.
+
+ -- Id: C.11
+ function "<" (L : BIT_VECTOR; R : NATURAL) return BOOLEAN;
+ -- Result subtype: BOOLEAN
+ -- Result: Computes "L < R" where L is an UNSIGNED vector and
+ -- R is a non-negative INTEGER.
+
+ --============================================================================
+ -- Id: C.13
+ function "<=" (L, R : BIT_VECTOR) return BOOLEAN;
+ -- Result subtype: BOOLEAN
+ -- Result: Computes "L <= R" where L and R are UNSIGNED vectors possibly
+ -- of different lengths.
+
+ -- Id: C.15
+ function "<=" (L : NATURAL; R : BIT_VECTOR) return BOOLEAN;
+ -- Result subtype: BOOLEAN
+ -- Result: Computes "L <= R" where L is a non-negative INTEGER and
+ -- R is an UNSIGNED vector.
+
+ -- Id: C.17
+ function "<=" (L : BIT_VECTOR; R : NATURAL) return BOOLEAN;
+ -- Result subtype: BOOLEAN
+ -- Result: Computes "L <= R" where L is an UNSIGNED vector and
+ -- R is a non-negative INTEGER.
+
+ --============================================================================
+ -- Id: C.19
+ function ">=" (L, R : BIT_VECTOR) return BOOLEAN;
+ -- Result subtype: BOOLEAN
+ -- Result: Computes "L >= R" where L and R are UNSIGNED vectors possibly
+ -- of different lengths.
+
+ -- Id: C.21
+ function ">=" (L : NATURAL; R : BIT_VECTOR) return BOOLEAN;
+ -- Result subtype: BOOLEAN
+ -- Result: Computes "L >= R" where L is a non-negative INTEGER and
+ -- R is an UNSIGNED vector.
+
+ -- Id: C.23
+ function ">=" (L : BIT_VECTOR; R : NATURAL) return BOOLEAN;
+ -- Result subtype: BOOLEAN
+ -- Result: Computes "L >= R" where L is an UNSIGNED vector and
+ -- R is a non-negative INTEGER.
+
+ --============================================================================
+ -- Id: C.25
+ function "=" (L, R : BIT_VECTOR) return BOOLEAN;
+ -- Result subtype: BOOLEAN
+ -- Result: Computes "L = R" where L and R are UNSIGNED vectors possibly
+ -- of different lengths.
+
+ -- Id: C.27
+ function "=" (L : NATURAL; R : BIT_VECTOR) return BOOLEAN;
+ -- Result subtype: BOOLEAN
+ -- Result: Computes "L = R" where L is a non-negative INTEGER and
+ -- R is an UNSIGNED vector.
+
+ -- Id: C.29
+ function "=" (L : BIT_VECTOR; R : NATURAL) return BOOLEAN;
+ -- Result subtype: BOOLEAN
+ -- Result: Computes "L = R" where L is an UNSIGNED vector and
+ -- R is a non-negative INTEGER.
+
+ --============================================================================
+
+ -- Id: C.31
+ function "/=" (L, R : BIT_VECTOR) return BOOLEAN;
+ -- Result subtype: BOOLEAN
+ -- Result: Computes "L /= R" where L and R are UNSIGNED vectors possibly
+ -- of different lengths.
+
+ -- Id: C.33
+ function "/=" (L : NATURAL; R : BIT_VECTOR) return BOOLEAN;
+ -- Result subtype: BOOLEAN
+ -- Result: Computes "L /= R" where L is a non-negative INTEGER and
+ -- R is an UNSIGNED vector.
+
+ -- Id: C.35
+ function "/=" (L : BIT_VECTOR; R : NATURAL) return BOOLEAN;
+ -- Result subtype: BOOLEAN
+ -- Result: Computes "L /= R" where L is an UNSIGNED vector and
+ -- R is a non-negative INTEGER.
+
+ --============================================================================
+
+ -- Id: C.37
+ function MINIMUM (L, R : BIT_VECTOR) return BIT_VECTOR;
+ -- Result subtype: BIT_VECTOR
+ -- Result: Returns the lesser of two UNSIGNED vectors that may be
+ -- of different lengths.
+
+ -- Id: C.39
+ function MINIMUM (L : NATURAL; R : BIT_VECTOR) return BIT_VECTOR;
+ -- Result subtype: BIT_VECTOR
+ -- Result: Returns the lesser of a nonnegative INTEGER, L, and
+ -- an UNSIGNED vector, R.
+
+ -- Id: C.41
+ function MINIMUM (L : BIT_VECTOR; R : NATURAL) return BIT_VECTOR;
+ -- Result subtype: BIT_VECTOR
+ -- Result: Returns the lesser of an UNSIGNED vector, L, and
+ -- a nonnegative INTEGER, R.
+
+ --============================================================================
+
+ -- Id: C.43
+ function MAXIMUM (L, R : BIT_VECTOR) return BIT_VECTOR;
+ -- Result subtype: BIT_VECTOR
+ -- Result: Returns the greater of two UNSIGNED vectors that may be
+ -- of different lengths.
+
+ -- Id: C.45
+ function MAXIMUM (L : NATURAL; R : BIT_VECTOR) return BIT_VECTOR;
+ -- Result subtype: BIT_VECTOR
+ -- Result: Returns the greater of a nonnegative INTEGER, L, and
+ -- an UNSIGNED vector, R.
+
+ -- Id: C.47
+ function MAXIMUM (L : BIT_VECTOR; R : NATURAL) return BIT_VECTOR;
+ -- Result subtype: BIT_VECTOR
+ -- Result: Returns the greater of an UNSIGNED vector, L, and
+ -- a nonnegative INTEGER, R.
+
+ --============================================================================
+ -- Id: C.49
+ function "?>" (L, R : BIT_VECTOR) return BIT;
+ -- Result subtype: BIT
+ -- Result: Computes "L > R" where L and R are UNSIGNED vectors possibly
+ -- of different lengths.
+
+ -- Id: C.51
+ function "?>" (L : NATURAL; R : BIT_VECTOR) return BIT;
+ -- Result subtype: BIT
+ -- Result: Computes "L > R" where L is a nonnegative INTEGER and
+ -- R is an UNSIGNED vector.
+
+ -- Id: C.53
+ function "?>" (L : BIT_VECTOR; R : NATURAL) return BIT;
+ -- Result subtype: BIT
+ -- Result: Computes "L > R" where L is an UNSIGNED vector and
+ -- R is a nonnegative INTEGER.
+
+ --============================================================================
+
+ -- Id: C.55
+ function "?<" (L, R : BIT_VECTOR) return BIT;
+ -- Result subtype: BIT
+ -- Result: Computes "L < R" where L and R are UNSIGNED vectors possibly
+ -- of different lengths.
+
+ -- Id: C.57
+ function "?<" (L : NATURAL; R : BIT_VECTOR) return BIT;
+ -- Result subtype: BIT
+ -- Result: Computes "L < R" where L is a nonnegative INTEGER and
+ -- R is an UNSIGNED vector.
+
+ -- Id: C.59
+ function "?<" (L : BIT_VECTOR; R : NATURAL) return BIT;
+ -- Result subtype: BIT
+ -- Result: Computes "L < R" where L is an UNSIGNED vector and
+ -- R is a nonnegative INTEGER.
+
+ --============================================================================
+
+ -- Id: C.61
+ function "?<=" (L, R : BIT_VECTOR) return BIT;
+ -- Result subtype: BIT
+ -- Result: Computes "L <= R" where L and R are UNSIGNED vectors possibly
+ -- of different lengths.
+
+ -- Id: C.63
+ function "?<=" (L : NATURAL; R : BIT_VECTOR) return BIT;
+ -- Result subtype: BIT
+ -- Result: Computes "L <= R" where L is a nonnegative INTEGER and
+ -- R is an UNSIGNED vector.
+
+ -- Id: C.65
+ function "?<=" (L : BIT_VECTOR; R : NATURAL) return BIT;
+ -- Result subtype: BIT
+ -- Result: Computes "L <= R" where L is an UNSIGNED vector and
+ -- R is a nonnegative INTEGER.
+
+ --============================================================================
+
+ -- Id: C.67
+ function "?>=" (L, R : BIT_VECTOR) return BIT;
+ -- Result subtype: BIT
+ -- Result: Computes "L >= R" where L and R are UNSIGNED vectors possibly
+ -- of different lengths.
+
+ -- Id: C.69
+ function "?>=" (L : NATURAL; R : BIT_VECTOR) return BIT;
+ -- Result subtype: BIT
+ -- Result: Computes "L >= R" where L is a nonnegative INTEGER and
+ -- R is an UNSIGNED vector.
+
+ -- Id: C.71
+ function "?>=" (L : BIT_VECTOR; R : NATURAL) return BIT;
+ -- Result subtype: BIT
+ -- Result: Computes "L >= R" where L is an UNSIGNED vector and
+ -- R is a nonnegative INTEGER.
+
+ --============================================================================
+
+ -- Id: C.73
+ function "?=" (L, R : BIT_VECTOR) return BIT;
+ -- Result subtype: BIT
+ -- Result: Computes "L = R" where L and R are UNSIGNED vectors possibly
+ -- of different lengths.
+
+ -- Id: C.75
+ function "?=" (L : NATURAL; R : BIT_VECTOR) return BIT;
+ -- Result subtype: BIT
+ -- Result: Computes "L = R" where L is a nonnegative INTEGER and
+ -- R is an UNSIGNED vector.
+
+ -- Id: C.77
+ function "?=" (L : BIT_VECTOR; R : NATURAL) return BIT;
+ -- Result subtype: BIT
+ -- Result: Computes "L = R" where L is an UNSIGNED vector and
+ -- R is a nonnegative INTEGER.
+
+ --============================================================================
+
+ -- Id: C.79
+ function "?/=" (L, R : BIT_VECTOR) return BIT;
+ -- Result subtype: BIT
+ -- Result: Computes "L /= R" where L and R are UNSIGNED vectors possibly
+ -- of different lengths.
+
+ -- Id: C.81
+ function "?/=" (L : NATURAL; R : BIT_VECTOR) return BIT;
+ -- Result subtype: BIT
+ -- Result: Computes "L /= R" where L is a nonnegative INTEGER and
+ -- R is an UNSIGNED vector.
+
+ -- Id: C.83
+ function "?/=" (L : BIT_VECTOR; R : NATURAL) return BIT;
+ -- Result subtype: BIT
+ -- Result: Computes "L /= R" where L is an UNSIGNED vector and
+ -- R is a nonnegative INTEGER.
+
+ --============================================================================
+ -- Shift and Rotate Functions
+ --============================================================================
+
+ -- Id: S.1
+ function SHIFT_LEFT (ARG : BIT_VECTOR; COUNT : NATURAL) return BIT_VECTOR;
+ -- Result subtype: bit_vector(ARG'LENGTH-1 downto 0)
+ -- Result: Performs a shift-left on an UNSIGNED vector COUNT times.
+ -- The vacated positions are filled with '0'.
+ -- The COUNT leftmost elements are lost.
+
+ -- Id: S.2
+ function SHIFT_RIGHT (ARG : BIT_VECTOR; COUNT : NATURAL) return BIT_VECTOR;
+ -- Result subtype: UNSIGNED(ARG'LENGTH-1 downto 0)
+ -- Result: Performs a shift-right on an UNSIGNED vector COUNT times.
+ -- The vacated positions are filled with '0'.
+ -- The COUNT rightmost elements are lost.
+ --============================================================================
+
+ -- Id: S.5
+ function ROTATE_LEFT (ARG : BIT_VECTOR; COUNT : NATURAL) return BIT_VECTOR;
+ -- Result subtype: bit_vector(ARG'LENGTH-1 downto 0)
+ -- Result: Performs a rotate-left of an UNSIGNED vector COUNT times.
+
+ -- Id: S.6
+ function ROTATE_RIGHT (ARG : BIT_VECTOR; COUNT : NATURAL) return BIT_VECTOR;
+ -- Result subtype: bit_vector(ARG'LENGTH-1 downto 0)
+ -- Result: Performs a rotate-right of an UNSIGNED vector COUNT times.
+
+
+ --============================================================================
+
+ ------------------------------------------------------------------------------
+ -- Note: Function S.9 is not compatible with IEEE Std 1076-1987. Comment
+ -- out the function (declaration and body) for IEEE Std 1076-1987 compatibility.
+ ------------------------------------------------------------------------------
+ -- Id: S.9
+ function "sll" (ARG : BIT_VECTOR; COUNT : INTEGER) return BIT_VECTOR;
+ -- Result subtype: BIT_VECTOR(ARG'LENGTH-1 downto 0)
+ -- Result: SHIFT_LEFT(ARG, COUNT)
+
+ ------------------------------------------------------------------------------
+ -- Note: Function S.11 is not compatible with IEEE Std 1076-1987. Comment
+ -- out the function (declaration and body) for IEEE Std 1076-1987 compatibility.
+ ------------------------------------------------------------------------------
+ -- Id: S.11
+ function "srl" (ARG : BIT_VECTOR; COUNT : INTEGER) return BIT_VECTOR;
+ -- Result subtype: BIT_VECTOR(ARG'LENGTH-1 downto 0)
+ -- Result: SHIFT_RIGHT(ARG, COUNT)
+
+ ------------------------------------------------------------------------------
+ -- Note: Function S.13 is not compatible with IEEE Std 1076-1987. Comment
+ -- out the function (declaration and body) for IEEE Std 1076-1987 compatibility.
+ ------------------------------------------------------------------------------
+ -- Id: S.13
+ function "rol" (ARG : BIT_VECTOR; COUNT : INTEGER) return BIT_VECTOR;
+ -- Result subtype: BIT_VECTOR(ARG'LENGTH-1 downto 0)
+ -- Result: ROTATE_LEFT(ARG, COUNT)
+
+ ------------------------------------------------------------------------------
+ -- Note: Function S.15 is not compatible with IEEE Std 1076-1987. Comment
+ -- out the function (declaration and body) for IEEE Std 1076-1987 compatibility.
+ ------------------------------------------------------------------------------
+ -- Id: S.15
+ function "ror" (ARG : BIT_VECTOR; COUNT : INTEGER) return BIT_VECTOR;
+ -- Result subtype: BIT_VECTOR(ARG'LENGTH-1 downto 0)
+ -- Result: ROTATE_RIGHT(ARG, COUNT)
+
+ ------------------------------------------------------------------------------
+ -- Note: Function S.17 is not compatible with IEEE Std 1076-1987. Comment
+ -- out the function (declaration and body) for IEEE Std 1076-1987 compatibility.
+ ------------------------------------------------------------------------------
+ -- Id: S.17
+ function "sla" (ARG : BIT_VECTOR; COUNT : INTEGER) return BIT_VECTOR;
+ -- Result subtype: BIT_VECTOR(ARG'LENGTH-1 downto 0)
+ -- Result: SHIFT_LEFT(ARG, COUNT)
+
+ ------------------------------------------------------------------------------
+ -- Note: Function S.19 is not compatible with IEEE Std 1076-1987. Comment
+ -- out the function (declaration and body) for IEEE Std 1076-1987 compatibility.
+ ------------------------------------------------------------------------------
+ -- Id: S.19
+ function "sra" (ARG : BIT_VECTOR; COUNT : INTEGER) return BIT_VECTOR;
+ -- Result subtype: BIT_VECTOR(ARG'LENGTH-1 downto 0)
+ -- Result: SHIFT_RIGHT(ARG, COUNT)
+
+
+ --============================================================================
+ -- RESIZE Functions
+ --============================================================================
+
+ -- Id: R.2
+ function RESIZE (ARG : BIT_VECTOR; NEW_SIZE : NATURAL) return BIT_VECTOR;
+ -- Result subtype: bit_vector(NEW_SIZE-1 downto 0)
+ -- Result: Resizes the UNSIGNED vector ARG to the specified size.
+ -- To create a larger vector, the new [leftmost] bit positions
+ -- are filled with '0'. When truncating, the leftmost bits
+ -- are dropped.
+
+ function RESIZE (ARG, SIZE_RES : BIT_VECTOR) return BIT_VECTOR;
+ -- Result subtype: BIT_VECTOR (SIZE_RES'length-1 downto 0)
+
+ --============================================================================
+ -- Conversion Functions
+ --============================================================================
+
+ -- Id: D.1
+ function TO_INTEGER (ARG : BIT_VECTOR) return NATURAL;
+ -- Result subtype: NATURAL. Value cannot be negative since parameter is an
+ -- UNSIGNED vector.
+ -- Result: Converts the UNSIGNED vector to an INTEGER.
+
+ -- Id: D.3
+ function To_BitVector (ARG, SIZE : NATURAL) return BIT_VECTOR;
+ -- Result subtype: bit_vector(SIZE-1 downto 0)
+ -- Result: Converts a non-negative INTEGER to an UNSIGNED vector with
+ -- the specified size.
+
+ function To_BitVector (ARG : NATURAL; SIZE_RES : BIT_VECTOR)
+ return BIT_VECTOR;
+ -- Result subtype: STD_LOGIC_VECTOR(SIZE_RES'length-1 downto 0)
+
+-- begin LCS-2006-130
+ alias To_Bit_Vector is
+ To_BitVector[NATURAL, NATURAL return BIT_VECTOR];
+ alias To_BV is
+ To_BitVector[NATURAL, NATURAL return BIT_VECTOR];
+
+ alias To_Bit_Vector is
+ To_BitVector[NATURAL, BIT_VECTOR return BIT_VECTOR];
+ alias To_BV is
+ To_BitVector[NATURAL, BIT_VECTOR return BIT_VECTOR];
+
+end package NUMERIC_BIT_UNSIGNED;
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