diff options
Diffstat (limited to 'ieee_proposed/rtl/std_logic_1164_additions.vhd')
| -rw-r--r-- | ieee_proposed/rtl/std_logic_1164_additions.vhd | 1808 |
1 files changed, 1808 insertions, 0 deletions
diff --git a/ieee_proposed/rtl/std_logic_1164_additions.vhd b/ieee_proposed/rtl/std_logic_1164_additions.vhd new file mode 100644 index 0000000..0c71490 --- /dev/null +++ b/ieee_proposed/rtl/std_logic_1164_additions.vhd @@ -0,0 +1,1808 @@ +------------------------------------------------------------------------------ +-- "std_logic_1164_additions" package contains the additions to the standard +-- "std_logic_1164" package proposed by the VHDL-200X-ft working group. +-- This package should be compiled into "ieee_proposed" and used as follows: +-- use ieee.std_logic_1164.all; +-- use ieee_proposed.std_logic_1164_additions.all; +-- Last Modified: $Date: 2007-09-11 14:52:13-04 $ +-- RCS ID: $Id: std_logic_1164_additions.vhdl,v 1.12 2007-09-11 14:52:13-04 l435385 Exp $ +-- +-- Created for VHDL-200X par, David Bishop (dbishop@vhdl.org) +------------------------------------------------------------------------------ +library ieee; +use ieee.std_logic_1164.all; +use std.textio.all; +package std_logic_1164_additions is + + -- NOTE that in the new std_logic_1164, STD_LOGIC_VECTOR is a resolved + -- subtype of STD_ULOGIC_VECTOR. Thus there is no need for funcitons which + -- take inputs in STD_LOGIC_VECTOR. + -- For compatability with VHDL-2002, I have replicated all of these funcitons + -- here for STD_LOGIC_VECTOR. + -- new aliases +-- alias to_bv is ieee.std_logic_1164.To_bitvector [STD_LOGIC_VECTOR, BIT return BIT_VECTOR]; +-- alias to_bv is ieee.std_logic_1164.To_bitvector [STD_ULOGIC_VECTOR, BIT return BIT_VECTOR]; +-- alias to_bit_vector is ieee.std_logic_1164.To_bitvector [STD_LOGIC_VECTOR, BIT return BIT_VECTOR]; +-- alias to_bit_vector is ieee.std_logic_1164.To_bitvector [STD_ULOGIC_VECTOR, BIT return BIT_VECTOR]; +-- alias to_slv is ieee.std_logic_1164.To_StdLogicVector [BIT_VECTOR return STD_LOGIC_VECTOR]; +-- alias to_slv is ieee.std_logic_1164.To_StdLogicVector [STD_ULOGIC_VECTOR return STD_LOGIC_VECTOR]; +-- alias to_std_logic_vector is ieee.std_logic_1164.To_StdLogicVector [BIT_VECTOR return STD_LOGIC_VECTOR]; +-- alias to_std_logic_vector is ieee.std_logic_1164.To_StdLogicVector [STD_ULOGIC_VECTOR return STD_LOGIC_VECTOR]; +-- alias to_sulv is ieee.std_logic_1164.To_StdULogicVector [BIT_VECTOR return STD_ULOGIC_VECTOR]; +-- alias to_sulv is ieee.std_logic_1164.To_StdULogicVector [STD_LOGIC_VECTOR return STD_ULOGIC_VECTOR]; +-- alias to_std_ulogic_vector is ieee.std_logic_1164.To_StdULogicVector [BIT_VECTOR return STD_ULOGIC_VECTOR]; +-- alias to_std_ulogic_vector is ieee.std_logic_1164.To_StdULogicVector [STD_LOGIC_VECTOR return STD_ULOGIC_VECTOR]; + + function TO_01 (s : STD_ULOGIC_VECTOR; xmap : STD_ULOGIC := '0') + return STD_ULOGIC_VECTOR; + function TO_01 (s : STD_ULOGIC; xmap : STD_ULOGIC := '0') + return STD_ULOGIC; + function TO_01 (s : BIT_VECTOR; xmap : STD_ULOGIC := '0') + return STD_ULOGIC_VECTOR; + function TO_01 (s : BIT; xmap : STD_ULOGIC := '0') + return STD_ULOGIC; + + ------------------------------------------------------------------- + -- overloaded shift operators + ------------------------------------------------------------------- + + function "sll" (l : STD_LOGIC_VECTOR; r : INTEGER) return STD_LOGIC_VECTOR; + function "sll" (l : STD_ULOGIC_VECTOR; r : INTEGER) return STD_ULOGIC_VECTOR; + + function "srl" (l : STD_LOGIC_VECTOR; r : INTEGER) return STD_LOGIC_VECTOR; + function "srl" (l : STD_ULOGIC_VECTOR; r : INTEGER) return STD_ULOGIC_VECTOR; + + function "rol" (l : STD_LOGIC_VECTOR; r : INTEGER) return STD_LOGIC_VECTOR; + function "rol" (l : STD_ULOGIC_VECTOR; r : INTEGER) return STD_ULOGIC_VECTOR; + + function "ror" (l : STD_LOGIC_VECTOR; r : INTEGER) return STD_LOGIC_VECTOR; + function "ror" (l : STD_ULOGIC_VECTOR; r : INTEGER) return STD_ULOGIC_VECTOR; + ------------------------------------------------------------------- + -- vector/scalar overloaded logical operators + ------------------------------------------------------------------- + function "and" (l : STD_LOGIC_VECTOR; r : STD_ULOGIC) return STD_LOGIC_VECTOR; + function "and" (l : STD_ULOGIC_VECTOR; r : STD_ULOGIC) return STD_ULOGIC_VECTOR; + function "and" (l : STD_ULOGIC; r : STD_LOGIC_VECTOR) return STD_LOGIC_VECTOR; + function "and" (l : STD_ULOGIC; r : STD_ULOGIC_VECTOR) return STD_ULOGIC_VECTOR; + function "nand" (l : STD_LOGIC_VECTOR; r : STD_ULOGIC) return STD_LOGIC_VECTOR; + function "nand" (l : STD_ULOGIC_VECTOR; r : STD_ULOGIC) return STD_ULOGIC_VECTOR; + function "nand" (l : STD_ULOGIC; r : STD_LOGIC_VECTOR) return STD_LOGIC_VECTOR; + function "nand" (l : STD_ULOGIC; r : STD_ULOGIC_VECTOR) return STD_ULOGIC_VECTOR; + function "or" (l : STD_LOGIC_VECTOR; r : STD_ULOGIC) return STD_LOGIC_VECTOR; + function "or" (l : STD_ULOGIC_VECTOR; r : STD_ULOGIC) return STD_ULOGIC_VECTOR; + function "or" (l : STD_ULOGIC; r : STD_LOGIC_VECTOR) return STD_LOGIC_VECTOR; + function "or" (l : STD_ULOGIC; r : STD_ULOGIC_VECTOR) return STD_ULOGIC_VECTOR; + function "nor" (l : STD_LOGIC_VECTOR; r : STD_ULOGIC) return STD_LOGIC_VECTOR; + function "nor" (l : STD_ULOGIC_VECTOR; r : STD_ULOGIC) return STD_ULOGIC_VECTOR; + function "nor" (l : STD_ULOGIC; r : STD_LOGIC_VECTOR) return STD_LOGIC_VECTOR; + function "nor" (l : STD_ULOGIC; r : STD_ULOGIC_VECTOR) return STD_ULOGIC_VECTOR; + function "xor" (l : STD_LOGIC_VECTOR; r : STD_ULOGIC) return STD_LOGIC_VECTOR; + function "xor" (l : STD_ULOGIC_VECTOR; r : STD_ULOGIC) return STD_ULOGIC_VECTOR; + function "xor" (l : STD_ULOGIC; r : STD_LOGIC_VECTOR) return STD_LOGIC_VECTOR; + function "xor" (l : STD_ULOGIC; r : STD_ULOGIC_VECTOR) return STD_ULOGIC_VECTOR; + function "xnor" (l : STD_LOGIC_VECTOR; r : STD_ULOGIC) return STD_LOGIC_VECTOR; + function "xnor" (l : STD_ULOGIC_VECTOR; r : STD_ULOGIC) return STD_ULOGIC_VECTOR; + function "xnor" (l : STD_ULOGIC; r : STD_LOGIC_VECTOR) return STD_LOGIC_VECTOR; + function "xnor" (l : STD_ULOGIC; r : STD_ULOGIC_VECTOR) return STD_ULOGIC_VECTOR; + + ------------------------------------------------------------------- + -- vector-reduction functions. + -- "and" functions default to "1", or defaults to "0" + ------------------------------------------------------------------- + ----------------------------------------------------------------------------- + -- %%% Replace the "_reduce" functions with the ones commented out below. + ----------------------------------------------------------------------------- + -- function "and" ( l : std_logic_vector ) RETURN std_ulogic; + -- function "and" ( l : std_ulogic_vector ) RETURN std_ulogic; + -- function "nand" ( l : std_logic_vector ) RETURN std_ulogic; + -- function "nand" ( l : std_ulogic_vector ) RETURN std_ulogic; + -- function "or" ( l : std_logic_vector ) RETURN std_ulogic; + -- function "or" ( l : std_ulogic_vector ) RETURN std_ulogic; + -- function "nor" ( l : std_logic_vector ) RETURN std_ulogic; + -- function "nor" ( l : std_ulogic_vector ) RETURN std_ulogic; + -- function "xor" ( l : std_logic_vector ) RETURN std_ulogic; + -- function "xor" ( l : std_ulogic_vector ) RETURN std_ulogic; + -- function "xnor" ( l : std_logic_vector ) RETURN std_ulogic; + -- function "xnor" ( l : std_ulogic_vector ) RETURN std_ulogic; + function and_reduce (l : STD_LOGIC_VECTOR) return STD_ULOGIC; + function and_reduce (l : STD_ULOGIC_VECTOR) return STD_ULOGIC; + function nand_reduce (l : STD_LOGIC_VECTOR) return STD_ULOGIC; + function nand_reduce (l : STD_ULOGIC_VECTOR) return STD_ULOGIC; + function or_reduce (l : STD_LOGIC_VECTOR) return STD_ULOGIC; + function or_reduce (l : STD_ULOGIC_VECTOR) return STD_ULOGIC; + function nor_reduce (l : STD_LOGIC_VECTOR) return STD_ULOGIC; + function nor_reduce (l : STD_ULOGIC_VECTOR) return STD_ULOGIC; + function xor_reduce (l : STD_LOGIC_VECTOR) return STD_ULOGIC; + function xor_reduce (l : STD_ULOGIC_VECTOR) return STD_ULOGIC; + function xnor_reduce (l : STD_LOGIC_VECTOR) return STD_ULOGIC; + function xnor_reduce (l : STD_ULOGIC_VECTOR) return STD_ULOGIC; + ------------------------------------------------------------------- + -- ?= operators, same functionality as 1076.3 1994 std_match + ------------------------------------------------------------------- +-- FUNCTION "?=" ( l, r : std_ulogic ) RETURN std_ulogic; +-- FUNCTION "?=" ( l, r : std_logic_vector ) RETURN std_ulogic; +-- FUNCTION "?=" ( l, r : std_ulogic_vector ) RETURN std_ulogic; +-- FUNCTION "?/=" ( l, r : std_ulogic ) RETURN std_ulogic; +-- FUNCTION "?/=" ( l, r : std_logic_vector ) RETURN std_ulogic; +-- FUNCTION "?/=" ( l, r : std_ulogic_vector ) RETURN std_ulogic; +-- FUNCTION "?>" ( l, r : std_ulogic ) RETURN std_ulogic; +-- FUNCTION "?>=" ( l, r : std_ulogic ) RETURN std_ulogic; +-- FUNCTION "?<" ( l, r : std_ulogic ) RETURN std_ulogic; +-- FUNCTION "?<=" ( l, r : std_ulogic ) RETURN std_ulogic; + +-- function \?=\ (l, r : STD_ULOGIC) return STD_ULOGIC; +-- function \?=\ (l, r : STD_LOGIC_VECTOR) return STD_ULOGIC; +-- function \?=\ (l, r : STD_ULOGIC_VECTOR) return STD_ULOGIC; +-- function \?/=\ (l, r : STD_ULOGIC) return STD_ULOGIC; +-- function \?/=\ (l, r : STD_LOGIC_VECTOR) return STD_ULOGIC; +-- function \?/=\ (l, r : STD_ULOGIC_VECTOR) return STD_ULOGIC; + function \?>\ (l, r : STD_ULOGIC) return STD_ULOGIC; + function \?>=\ (l, r : STD_ULOGIC) return STD_ULOGIC; + function \?<\ (l, r : STD_ULOGIC) return STD_ULOGIC; + function \?<=\ (l, r : STD_ULOGIC) return STD_ULOGIC; + + + -- "??" operator, converts a std_ulogic to a boolean. + --%%% Uncomment the following operators + -- FUNCTION "??" (S : STD_ULOGIC) RETURN BOOLEAN; + --%%% REMOVE the following funciton (for testing only) + function \??\ (S : STD_ULOGIC) return BOOLEAN; + + -- rtl_synthesis off +-- pragma synthesis_off + function to_string (value : STD_ULOGIC) return STRING; + function to_string (value : STD_ULOGIC_VECTOR) return STRING; + function to_string (value : STD_LOGIC_VECTOR) return STRING; + + -- explicitly defined operations + + alias TO_BSTRING is TO_STRING [STD_ULOGIC_VECTOR return STRING]; + alias TO_BINARY_STRING is TO_STRING [STD_ULOGIC_VECTOR return STRING]; + function TO_OSTRING (VALUE : STD_ULOGIC_VECTOR) return STRING; + alias TO_OCTAL_STRING is TO_OSTRING [STD_ULOGIC_VECTOR return STRING]; + function TO_HSTRING (VALUE : STD_ULOGIC_VECTOR) return STRING; + alias TO_HEX_STRING is TO_HSTRING [STD_ULOGIC_VECTOR return STRING]; + + procedure READ (L : inout LINE; VALUE : out STD_ULOGIC; GOOD : out BOOLEAN); + procedure READ (L : inout LINE; VALUE : out STD_ULOGIC); + + procedure READ (L : inout LINE; VALUE : out STD_ULOGIC_VECTOR; GOOD : out BOOLEAN); + procedure READ (L : inout LINE; VALUE : out STD_ULOGIC_VECTOR); + + procedure WRITE (L : inout LINE; VALUE : in STD_ULOGIC; + JUSTIFIED : in SIDE := right; FIELD : in WIDTH := 0); + + procedure WRITE (L : inout LINE; VALUE : in STD_ULOGIC_VECTOR; + JUSTIFIED : in SIDE := right; FIELD : in WIDTH := 0); + + alias BREAD is READ [LINE, STD_ULOGIC_VECTOR, BOOLEAN]; + alias BREAD is READ [LINE, STD_ULOGIC_VECTOR]; + alias BINARY_READ is READ [LINE, STD_ULOGIC_VECTOR, BOOLEAN]; + alias BINARY_READ is READ [LINE, STD_ULOGIC_VECTOR]; + + procedure OREAD (L : inout LINE; VALUE : out STD_ULOGIC_VECTOR; GOOD : out BOOLEAN); + procedure OREAD (L : inout LINE; VALUE : out STD_ULOGIC_VECTOR); + alias OCTAL_READ is OREAD [LINE, STD_ULOGIC_VECTOR, BOOLEAN]; + alias OCTAL_READ is OREAD [LINE, STD_ULOGIC_VECTOR]; + + procedure HREAD (L : inout LINE; VALUE : out STD_ULOGIC_VECTOR; GOOD : out BOOLEAN); + procedure HREAD (L : inout LINE; VALUE : out STD_ULOGIC_VECTOR); + alias HEX_READ is HREAD [LINE, STD_ULOGIC_VECTOR, BOOLEAN]; + alias HEX_READ is HREAD [LINE, STD_ULOGIC_VECTOR]; + + alias BWRITE is WRITE [LINE, STD_ULOGIC_VECTOR, SIDE, WIDTH]; + alias BINARY_WRITE is WRITE [LINE, STD_ULOGIC_VECTOR, SIDE, WIDTH]; + + procedure OWRITE (L : inout LINE; VALUE : in STD_ULOGIC_VECTOR; + JUSTIFIED : in SIDE := right; FIELD : in WIDTH := 0); + alias OCTAL_WRITE is OWRITE [LINE, STD_ULOGIC_VECTOR, SIDE, WIDTH]; + + procedure HWRITE (L : inout LINE; VALUE : in STD_ULOGIC_VECTOR; + JUSTIFIED : in SIDE := right; FIELD : in WIDTH := 0); + alias HEX_WRITE is HWRITE [LINE, STD_ULOGIC_VECTOR, SIDE, WIDTH]; + + alias TO_BSTRING is TO_STRING [STD_LOGIC_VECTOR return STRING]; + alias TO_BINARY_STRING is TO_STRING [STD_LOGIC_VECTOR return STRING]; + function TO_OSTRING (VALUE : STD_LOGIC_VECTOR) return STRING; + alias TO_OCTAL_STRING is TO_OSTRING [STD_LOGIC_VECTOR return STRING]; + function TO_HSTRING (VALUE : STD_LOGIC_VECTOR) return STRING; + alias TO_HEX_STRING is TO_HSTRING [STD_LOGIC_VECTOR return STRING]; + + procedure READ (L : inout LINE; VALUE : out STD_LOGIC_VECTOR; GOOD : out BOOLEAN); + procedure READ (L : inout LINE; VALUE : out STD_LOGIC_VECTOR); + + procedure WRITE (L : inout LINE; VALUE : in STD_LOGIC_VECTOR; + JUSTIFIED : in SIDE := right; FIELD : in WIDTH := 0); + + alias BREAD is READ [LINE, STD_LOGIC_VECTOR, BOOLEAN]; + alias BREAD is READ [LINE, STD_LOGIC_VECTOR]; + alias BINARY_READ is READ [LINE, STD_LOGIC_VECTOR, BOOLEAN]; + alias BINARY_READ is READ [LINE, STD_LOGIC_VECTOR]; + + procedure OREAD (L : inout LINE; VALUE : out STD_LOGIC_VECTOR; GOOD : out BOOLEAN); + procedure OREAD (L : inout LINE; VALUE : out STD_LOGIC_VECTOR); + alias OCTAL_READ is OREAD [LINE, STD_LOGIC_VECTOR, BOOLEAN]; + alias OCTAL_READ is OREAD [LINE, STD_LOGIC_VECTOR]; + + procedure HREAD (L : inout LINE; VALUE : out STD_LOGIC_VECTOR; GOOD : out BOOLEAN); + procedure HREAD (L : inout LINE; VALUE : out STD_LOGIC_VECTOR); + alias HEX_READ is HREAD [LINE, STD_LOGIC_VECTOR, BOOLEAN]; + alias HEX_READ is HREAD [LINE, STD_LOGIC_VECTOR]; + + alias BWRITE is WRITE [LINE, STD_LOGIC_VECTOR, SIDE, WIDTH]; + alias BINARY_WRITE is WRITE [LINE, STD_LOGIC_VECTOR, SIDE, WIDTH]; + + procedure OWRITE (L : inout LINE; VALUE : in STD_LOGIC_VECTOR; + JUSTIFIED : in SIDE := right; FIELD : in WIDTH := 0); + alias OCTAL_WRITE is OWRITE [LINE, STD_LOGIC_VECTOR, SIDE, WIDTH]; + + procedure HWRITE (L : inout LINE; VALUE : in STD_LOGIC_VECTOR; + JUSTIFIED : in SIDE := right; FIELD : in WIDTH := 0); + alias HEX_WRITE is HWRITE [LINE, STD_LOGIC_VECTOR, SIDE, WIDTH]; + -- rtl_synthesis on +-- pragma synthesis_on + function maximum (l, r : STD_ULOGIC_VECTOR) return STD_ULOGIC_VECTOR; + function maximum (l, r : STD_LOGIC_VECTOR) return STD_LOGIC_VECTOR; + function maximum (l, r : STD_ULOGIC) return STD_ULOGIC; + function minimum (l, r : STD_ULOGIC_VECTOR) return STD_ULOGIC_VECTOR; + function minimum (l, r : STD_LOGIC_VECTOR) return STD_LOGIC_VECTOR; + function minimum (l, r : STD_ULOGIC) return STD_ULOGIC; +end package std_logic_1164_additions; + +package body std_logic_1164_additions is +-- type stdlogic_table is array(STD_ULOGIC, STD_ULOGIC) of STD_ULOGIC; + ----------------------------------------------------------------------------- + -- New/updated funcitons for VHDL-200X fast track + ----------------------------------------------------------------------------- + -- to_01 + ------------------------------------------------------------------- + function TO_01 (s : STD_ULOGIC_VECTOR; xmap : STD_ULOGIC := '0') + return STD_ULOGIC_VECTOR is + variable RESULT : STD_ULOGIC_VECTOR(s'length-1 downto 0); + variable BAD_ELEMENT : BOOLEAN := false; + alias XS : STD_ULOGIC_VECTOR(s'length-1 downto 0) is s; + begin + for I in RESULT'range loop + case XS(I) is + when '0' | 'L' => RESULT(I) := '0'; + when '1' | 'H' => RESULT(I) := '1'; + when others => BAD_ELEMENT := true; + end case; + end loop; + if BAD_ELEMENT then + for I in RESULT'range loop + RESULT(I) := XMAP; -- standard fixup + end loop; + end if; + return RESULT; + end function TO_01; + ------------------------------------------------------------------- + function TO_01 (s : STD_ULOGIC; xmap : STD_ULOGIC := '0') + return STD_ULOGIC is + begin + case s is + when '0' | 'L' => RETURN '0'; + when '1' | 'H' => RETURN '1'; + when others => return xmap; + end case; + end function TO_01; + ------------------------------------------------------------------- + function TO_01 (s : BIT_VECTOR; xmap : STD_ULOGIC := '0') + return STD_ULOGIC_VECTOR is + variable RESULT : STD_ULOGIC_VECTOR(s'length-1 downto 0); + alias XS : BIT_VECTOR(s'length-1 downto 0) is s; + begin + for I in RESULT'range loop + case XS(I) is + when '0' => RESULT(I) := '0'; + when '1' => RESULT(I) := '1'; + end case; + end loop; + return RESULT; + end function TO_01; + ------------------------------------------------------------------- + function TO_01 (s : BIT; xmap : STD_ULOGIC := '0') + return STD_ULOGIC is + begin + case s is + when '0' => RETURN '0'; + when '1' => RETURN '1'; + end case; + end function TO_01; +-- end Bugzilla issue #148 + ------------------------------------------------------------------- + + ------------------------------------------------------------------- + -- overloaded shift operators + ------------------------------------------------------------------- + + ------------------------------------------------------------------- + -- sll + ------------------------------------------------------------------- + function "sll" (l : STD_LOGIC_VECTOR; r : INTEGER) return STD_LOGIC_VECTOR is + alias lv : STD_LOGIC_VECTOR (1 to l'length) is l; + variable result : STD_LOGIC_VECTOR (1 to l'length) := (others => '0'); + begin + if r >= 0 then + result(1 to l'length - r) := lv(r + 1 to l'length); + else + result := l srl -r; + end if; + return result; + end function "sll"; + ------------------------------------------------------------------- + function "sll" (l : STD_ULOGIC_VECTOR; r : INTEGER) return STD_ULOGIC_VECTOR is + alias lv : STD_ULOGIC_VECTOR (1 to l'length) is l; + variable result : STD_ULOGIC_VECTOR (1 to l'length) := (others => '0'); + begin + if r >= 0 then + result(1 to l'length - r) := lv(r + 1 to l'length); + else + result := l srl -r; + end if; + return result; + end function "sll"; + + ------------------------------------------------------------------- + -- srl + ------------------------------------------------------------------- + function "srl" (l : STD_LOGIC_VECTOR; r : INTEGER) return STD_LOGIC_VECTOR is + alias lv : STD_LOGIC_VECTOR (1 to l'length) is l; + variable result : STD_LOGIC_VECTOR (1 to l'length) := (others => '0'); + begin + if r >= 0 then + result(r + 1 to l'length) := lv(1 to l'length - r); + else + result := l sll -r; + end if; + return result; + end function "srl"; + ------------------------------------------------------------------- + function "srl" (l : STD_ULOGIC_VECTOR; r : INTEGER) return STD_ULOGIC_VECTOR is + alias lv : STD_ULOGIC_VECTOR (1 to l'length) is l; + variable result : STD_ULOGIC_VECTOR (1 to l'length) := (others => '0'); + begin + if r >= 0 then + result(r + 1 to l'length) := lv(1 to l'length - r); + else + result := l sll -r; + end if; + return result; + end function "srl"; + + ------------------------------------------------------------------- + -- rol + ------------------------------------------------------------------- + function "rol" (l : STD_LOGIC_VECTOR; r : INTEGER) return STD_LOGIC_VECTOR is + alias lv : STD_LOGIC_VECTOR (1 to l'length) is l; + variable result : STD_LOGIC_VECTOR (1 to l'length); + constant rm : INTEGER := r mod l'length; + begin + if r >= 0 then + result(1 to l'length - rm) := lv(rm + 1 to l'length); + result(l'length - rm + 1 to l'length) := lv(1 to rm); + else + result := l ror -r; + end if; + return result; + end function "rol"; + ------------------------------------------------------------------- + function "rol" (l : STD_ULOGIC_VECTOR; r : INTEGER) return STD_ULOGIC_VECTOR is + alias lv : STD_ULOGIC_VECTOR (1 to l'length) is l; + variable result : STD_ULOGIC_VECTOR (1 to l'length); + constant rm : INTEGER := r mod l'length; + begin + if r >= 0 then + result(1 to l'length - rm) := lv(rm + 1 to l'length); + result(l'length - rm + 1 to l'length) := lv(1 to rm); + else + result := l ror -r; + end if; + return result; + end function "rol"; + + ------------------------------------------------------------------- + -- ror + ------------------------------------------------------------------- + function "ror" (l : STD_LOGIC_VECTOR; r : INTEGER) return STD_LOGIC_VECTOR is + alias lv : STD_LOGIC_VECTOR (1 to l'length) is l; + variable result : STD_LOGIC_VECTOR (1 to l'length) := (others => '0'); + constant rm : INTEGER := r mod l'length; + begin + if r >= 0 then + result(rm + 1 to l'length) := lv(1 to l'length - rm); + result(1 to rm) := lv(l'length - rm + 1 to l'length); + else + result := l rol -r; + end if; + return result; + end function "ror"; + ------------------------------------------------------------------- + function "ror" (l : STD_ULOGIC_VECTOR; r : INTEGER) return STD_ULOGIC_VECTOR is + alias lv : STD_ULOGIC_VECTOR (1 to l'length) is l; + variable result : STD_ULOGIC_VECTOR (1 to l'length) := (others => '0'); + constant rm : INTEGER := r mod l'length; + begin + if r >= 0 then + result(rm + 1 to l'length) := lv(1 to l'length - rm); + result(1 to rm) := lv(l'length - rm + 1 to l'length); + else + result := l rol -r; + end if; + return result; + end function "ror"; + ------------------------------------------------------------------- + -- vector/scalar overloaded logical operators + ------------------------------------------------------------------- + + ------------------------------------------------------------------- + -- and + ------------------------------------------------------------------- + function "and" (l : STD_LOGIC_VECTOR; r : STD_ULOGIC) return STD_LOGIC_VECTOR is + alias lv : STD_LOGIC_VECTOR (1 to l'length) is l; + variable result : STD_LOGIC_VECTOR (1 to l'length); + begin + for i in result'range loop + result(i) := "and" (lv(i), r); + end loop; + return result; + end function "and"; + ------------------------------------------------------------------- + function "and" (l : STD_ULOGIC_VECTOR; r : STD_ULOGIC) return STD_ULOGIC_VECTOR is + alias lv : STD_ULOGIC_VECTOR (1 to l'length) is l; + variable result : STD_ULOGIC_VECTOR (1 to l'length); + begin + for i in result'range loop + result(i) := "and" (lv(i), r); + end loop; + return result; + end function "and"; + ------------------------------------------------------------------- + function "and" (l : STD_ULOGIC; r : STD_LOGIC_VECTOR) return STD_LOGIC_VECTOR is + alias rv : STD_LOGIC_VECTOR (1 to r'length) is r; + variable result : STD_LOGIC_VECTOR (1 to r'length); + begin + for i in result'range loop + result(i) := "and" (l, rv(i)); + end loop; + return result; + end function "and"; + ------------------------------------------------------------------- + function "and" (l : STD_ULOGIC; r : STD_ULOGIC_VECTOR) return STD_ULOGIC_VECTOR is + alias rv : STD_ULOGIC_VECTOR (1 to r'length) is r; + variable result : STD_ULOGIC_VECTOR (1 to r'length); + begin + for i in result'range loop + result(i) := "and" (l, rv(i)); + end loop; + return result; + end function "and"; + + ------------------------------------------------------------------- + -- nand + ------------------------------------------------------------------- + function "nand" (l : STD_LOGIC_VECTOR; r : STD_ULOGIC) return STD_LOGIC_VECTOR is + alias lv : STD_LOGIC_VECTOR (1 to l'length) is l; + variable result : STD_LOGIC_VECTOR (1 to l'length); + begin + for i in result'range loop + result(i) := "not"("and" (lv(i), r)); + end loop; + return result; + end function "nand"; + ------------------------------------------------------------------- + function "nand" (l : STD_ULOGIC_VECTOR; r : STD_ULOGIC) return STD_ULOGIC_VECTOR is + alias lv : STD_ULOGIC_VECTOR (1 to l'length) is l; + variable result : STD_ULOGIC_VECTOR (1 to l'length); + begin + for i in result'range loop + result(i) := "not"("and" (lv(i), r)); + end loop; + return result; + end function "nand"; + ------------------------------------------------------------------- + function "nand" (l : STD_ULOGIC; r : STD_LOGIC_VECTOR) return STD_LOGIC_VECTOR is + alias rv : STD_LOGIC_VECTOR (1 to r'length) is r; + variable result : STD_LOGIC_VECTOR (1 to r'length); + begin + for i in result'range loop + result(i) := "not"("and" (l, rv(i))); + end loop; + return result; + end function "nand"; + ------------------------------------------------------------------- + function "nand" (l : STD_ULOGIC; r : STD_ULOGIC_VECTOR) return STD_ULOGIC_VECTOR is + alias rv : STD_ULOGIC_VECTOR (1 to r'length) is r; + variable result : STD_ULOGIC_VECTOR (1 to r'length); + begin + for i in result'range loop + result(i) := "not"("and" (l, rv(i))); + end loop; + return result; + end function "nand"; + + ------------------------------------------------------------------- + -- or + ------------------------------------------------------------------- + function "or" (l : STD_LOGIC_VECTOR; r : STD_ULOGIC) return STD_LOGIC_VECTOR is + alias lv : STD_LOGIC_VECTOR (1 to l'length) is l; + variable result : STD_LOGIC_VECTOR (1 to l'length); + begin + for i in result'range loop + result(i) := "or" (lv(i), r); + end loop; + return result; + end function "or"; + ------------------------------------------------------------------- + function "or" (l : STD_ULOGIC_VECTOR; r : STD_ULOGIC) return STD_ULOGIC_VECTOR is + alias lv : STD_ULOGIC_VECTOR (1 to l'length) is l; + variable result : STD_ULOGIC_VECTOR (1 to l'length); + begin + for i in result'range loop + result(i) := "or" (lv(i), r); + end loop; + return result; + end function "or"; + ------------------------------------------------------------------- + function "or" (l : STD_ULOGIC; r : STD_LOGIC_VECTOR) return STD_LOGIC_VECTOR is + alias rv : STD_LOGIC_VECTOR (1 to r'length) is r; + variable result : STD_LOGIC_VECTOR (1 to r'length); + begin + for i in result'range loop + result(i) := "or" (l, rv(i)); + end loop; + return result; + end function "or"; + ------------------------------------------------------------------- + function "or" (l : STD_ULOGIC; r : STD_ULOGIC_VECTOR) return STD_ULOGIC_VECTOR is + alias rv : STD_ULOGIC_VECTOR (1 to r'length) is r; + variable result : STD_ULOGIC_VECTOR (1 to r'length); + begin + for i in result'range loop + result(i) := "or" (l, rv(i)); + end loop; + return result; + end function "or"; + + ------------------------------------------------------------------- + -- nor + ------------------------------------------------------------------- + function "nor" (l : STD_LOGIC_VECTOR; r : STD_ULOGIC) return STD_LOGIC_VECTOR is + alias lv : STD_LOGIC_VECTOR (1 to l'length) is l; + variable result : STD_LOGIC_VECTOR (1 to l'length); + begin + for i in result'range loop + result(i) := "not"("or" (lv(i), r)); + end loop; + return result; + end function "nor"; + ------------------------------------------------------------------- + function "nor" (l : STD_ULOGIC_VECTOR; r : STD_ULOGIC) return STD_ULOGIC_VECTOR is + alias lv : STD_ULOGIC_VECTOR (1 to l'length) is l; + variable result : STD_ULOGIC_VECTOR (1 to l'length); + begin + for i in result'range loop + result(i) := "not"("or" (lv(i), r)); + end loop; + return result; + end function "nor"; + ------------------------------------------------------------------- + function "nor" (l : STD_ULOGIC; r : STD_LOGIC_VECTOR) return STD_LOGIC_VECTOR is + alias rv : STD_LOGIC_VECTOR (1 to r'length) is r; + variable result : STD_LOGIC_VECTOR (1 to r'length); + begin + for i in result'range loop + result(i) := "not"("or" (l, rv(i))); + end loop; + return result; + end function "nor"; + ------------------------------------------------------------------- + function "nor" (l : STD_ULOGIC; r : STD_ULOGIC_VECTOR) return STD_ULOGIC_VECTOR is + alias rv : STD_ULOGIC_VECTOR (1 to r'length) is r; + variable result : STD_ULOGIC_VECTOR (1 to r'length); + begin + for i in result'range loop + result(i) := "not"("or" (l, rv(i))); + end loop; + return result; + end function "nor"; + + ------------------------------------------------------------------- + -- xor + ------------------------------------------------------------------- + function "xor" (l : STD_LOGIC_VECTOR; r : STD_ULOGIC) return STD_LOGIC_VECTOR is + alias lv : STD_LOGIC_VECTOR (1 to l'length) is l; + variable result : STD_LOGIC_VECTOR (1 to l'length); + begin + for i in result'range loop + result(i) := "xor" (lv(i), r); + end loop; + return result; + end function "xor"; + ------------------------------------------------------------------- + function "xor" (l : STD_ULOGIC_VECTOR; r : STD_ULOGIC) return STD_ULOGIC_VECTOR is + alias lv : STD_ULOGIC_VECTOR (1 to l'length) is l; + variable result : STD_ULOGIC_VECTOR (1 to l'length); + begin + for i in result'range loop + result(i) := "xor" (lv(i), r); + end loop; + return result; + end function "xor"; + ------------------------------------------------------------------- + function "xor" (l : STD_ULOGIC; r : STD_LOGIC_VECTOR) return STD_LOGIC_VECTOR is + alias rv : STD_LOGIC_VECTOR (1 to r'length) is r; + variable result : STD_LOGIC_VECTOR (1 to r'length); + begin + for i in result'range loop + result(i) := "xor" (l, rv(i)); + end loop; + return result; + end function "xor"; + ------------------------------------------------------------------- + function "xor" (l : STD_ULOGIC; r : STD_ULOGIC_VECTOR) return STD_ULOGIC_VECTOR is + alias rv : STD_ULOGIC_VECTOR (1 to r'length) is r; + variable result : STD_ULOGIC_VECTOR (1 to r'length); + begin + for i in result'range loop + result(i) := "xor" (l, rv(i)); + end loop; + return result; + end function "xor"; + + ------------------------------------------------------------------- + -- xnor + ------------------------------------------------------------------- + function "xnor" (l : STD_LOGIC_VECTOR; r : STD_ULOGIC) return STD_LOGIC_VECTOR is + alias lv : STD_LOGIC_VECTOR (1 to l'length) is l; + variable result : STD_LOGIC_VECTOR (1 to l'length); + begin + for i in result'range loop + result(i) := "not"("xor" (lv(i), r)); + end loop; + return result; + end function "xnor"; + ------------------------------------------------------------------- + function "xnor" (l : STD_ULOGIC_VECTOR; r : STD_ULOGIC) return STD_ULOGIC_VECTOR is + alias lv : STD_ULOGIC_VECTOR (1 to l'length) is l; + variable result : STD_ULOGIC_VECTOR (1 to l'length); + begin + for i in result'range loop + result(i) := "not"("xor" (lv(i), r)); + end loop; + return result; + end function "xnor"; + ------------------------------------------------------------------- + function "xnor" (l : STD_ULOGIC; r : STD_LOGIC_VECTOR) return STD_LOGIC_VECTOR is + alias rv : STD_LOGIC_VECTOR (1 to r'length) is r; + variable result : STD_LOGIC_VECTOR (1 to r'length); + begin + for i in result'range loop + result(i) := "not"("xor" (l, rv(i))); + end loop; + return result; + end function "xnor"; + ------------------------------------------------------------------- + function "xnor" (l : STD_ULOGIC; r : STD_ULOGIC_VECTOR) return STD_ULOGIC_VECTOR is + alias rv : STD_ULOGIC_VECTOR (1 to r'length) is r; + variable result : STD_ULOGIC_VECTOR (1 to r'length); + begin + for i in result'range loop + result(i) := "not"("xor" (l, rv(i))); + end loop; + return result; + end function "xnor"; + + ------------------------------------------------------------------- + -- vector-reduction functions + ------------------------------------------------------------------- + + ------------------------------------------------------------------- + -- and + ------------------------------------------------------------------- + function and_reduce (l : STD_LOGIC_VECTOR) return STD_ULOGIC is + begin + return and_reduce (to_StdULogicVector (l)); + end function and_reduce; + ------------------------------------------------------------------- + function and_reduce (l : STD_ULOGIC_VECTOR) return STD_ULOGIC is + variable result : STD_ULOGIC := '1'; + begin + for i in l'reverse_range loop + result := (l(i) and result); + end loop; + return result; + end function and_reduce; + + ------------------------------------------------------------------- + -- nand + ------------------------------------------------------------------- + function nand_reduce (l : STD_LOGIC_VECTOR) return STD_ULOGIC is + begin + return not (and_reduce(to_StdULogicVector(l))); + end function nand_reduce; + ------------------------------------------------------------------- + function nand_reduce (l : STD_ULOGIC_VECTOR) return STD_ULOGIC is + begin + return not (and_reduce(l)); + end function nand_reduce; + + ------------------------------------------------------------------- + -- or + ------------------------------------------------------------------- + function or_reduce (l : STD_LOGIC_VECTOR) return STD_ULOGIC is + begin + return or_reduce (to_StdULogicVector (l)); + end function or_reduce; + ------------------------------------------------------------------- + function or_reduce (l : STD_ULOGIC_VECTOR) return STD_ULOGIC is + variable result : STD_ULOGIC := '0'; + begin + for i in l'reverse_range loop + result := (l(i) or result); + end loop; + return result; + end function or_reduce; + + ------------------------------------------------------------------- + -- nor + ------------------------------------------------------------------- + function nor_reduce (l : STD_LOGIC_VECTOR) return STD_ULOGIC is + begin + return "not"(or_reduce(To_StdULogicVector(l))); + end function nor_reduce; + ------------------------------------------------------------------- + function nor_reduce (l : STD_ULOGIC_VECTOR) return STD_ULOGIC is + begin + return "not"(or_reduce(l)); + end function nor_reduce; + + ------------------------------------------------------------------- + -- xor + ------------------------------------------------------------------- + function xor_reduce (l : STD_LOGIC_VECTOR) return STD_ULOGIC is + begin + return xor_reduce (to_StdULogicVector (l)); + end function xor_reduce; + ------------------------------------------------------------------- + function xor_reduce (l : STD_ULOGIC_VECTOR) return STD_ULOGIC is + variable result : STD_ULOGIC := '0'; + begin + for i in l'reverse_range loop + result := (l(i) xor result); + end loop; + return result; + end function xor_reduce; + + ------------------------------------------------------------------- + -- xnor + ------------------------------------------------------------------- + function xnor_reduce (l : STD_LOGIC_VECTOR) return STD_ULOGIC is + begin + return "not"(xor_reduce(To_StdULogicVector(l))); + end function xnor_reduce; + ------------------------------------------------------------------- + function xnor_reduce (l : STD_ULOGIC_VECTOR) return STD_ULOGIC is + begin + return "not"(xor_reduce(l)); + end function xnor_reduce; + -- %%% End "remove the following functions" + + + -- The following functions are implicity in 1076-2006 + -- truth table for "?=" function +-- constant match_logic_table : stdlogic_table := ( +-- ----------------------------------------------------- +-- -- U X 0 1 Z W L H - | | +-- ----------------------------------------------------- +-- ('U', 'U', 'U', 'U', 'U', 'U', 'U', 'U', '1'), -- | U | +-- ('U', 'X', 'X', 'X', 'X', 'X', 'X', 'X', '1'), -- | X | +-- ('U', 'X', '1', '0', 'X', 'X', '1', '0', '1'), -- | 0 | +-- ('U', 'X', '0', '1', 'X', 'X', '0', '1', '1'), -- | 1 | +-- ('U', 'X', 'X', 'X', 'X', 'X', 'X', 'X', '1'), -- | Z | +-- ('U', 'X', 'X', 'X', 'X', 'X', 'X', 'X', '1'), -- | W | +-- ('U', 'X', '1', '0', 'X', 'X', '1', '0', '1'), -- | L | +-- ('U', 'X', '0', '1', 'X', 'X', '0', '1', '1'), -- | H | +-- ('1', '1', '1', '1', '1', '1', '1', '1', '1') -- | - | +-- ); + +-- constant no_match_logic_table : stdlogic_table := ( +-- ----------------------------------------------------- +-- -- U X 0 1 Z W L H - | | +-- ----------------------------------------------------- +-- ('U', 'U', 'U', 'U', 'U', 'U', 'U', 'U', '0'), -- | U | +-- ('U', 'X', 'X', 'X', 'X', 'X', 'X', 'X', '0'), -- | X | +-- ('U', 'X', '0', '1', 'X', 'X', '0', '1', '0'), -- | 0 | +-- ('U', 'X', '1', '0', 'X', 'X', '1', '0', '0'), -- | 1 | +-- ('U', 'X', 'X', 'X', 'X', 'X', 'X', 'X', '0'), -- | Z | +-- ('U', 'X', 'X', 'X', 'X', 'X', 'X', 'X', '0'), -- | W | +-- ('U', 'X', '0', '1', 'X', 'X', '0', '1', '0'), -- | L | +-- ('U', 'X', '1', '0', 'X', 'X', '1', '0', '0'), -- | H | +-- ('0', '0', '0', '0', '0', '0', '0', '0', '0') -- | - | +-- ); + + ------------------------------------------------------------------- + -- ?= functions, Similar to "std_match", but returns "std_ulogic". + ------------------------------------------------------------------- + -- %%% FUNCTION "?=" ( l, r : std_ulogic ) RETURN std_ulogic IS +-- function \?=\ (l, r : STD_ULOGIC) return STD_ULOGIC is +-- begin +-- return match_logic_table (l, r); +-- end function \?=\; +-- -- %%% END FUNCTION "?="; +-- ------------------------------------------------------------------- +-- -- %%% FUNCTION "?=" ( l, r : std_logic_vector ) RETURN std_ulogic IS +-- function \?=\ (l, r : STD_LOGIC_VECTOR) return STD_ULOGIC is +-- alias lv : STD_LOGIC_VECTOR(1 to l'length) is l; +-- alias rv : STD_LOGIC_VECTOR(1 to r'length) is r; +-- variable result, result1 : STD_ULOGIC; -- result +-- begin +-- -- Logically identical to an "=" operator. +-- if ((l'length < 1) or (r'length < 1)) then +-- report "STD_LOGIC_1164.""?="": null detected, returning X" +-- severity warning; +-- return 'X'; +-- end if; +-- if lv'length /= rv'length then +-- report "STD_LOGIC_1164.""?="": L'LENGTH /= R'LENGTH, returning X" +-- severity warning; +-- return 'X'; +-- else +-- result := '1'; +-- for i in lv'low to lv'high loop +-- result1 := match_logic_table(lv(i), rv(i)); +-- if result1 = 'U' then +-- return 'U'; +-- elsif result1 = 'X' or result = 'X' then +-- result := 'X'; +-- else +-- result := result and result1; +-- end if; +-- end loop; +-- return result; +-- end if; +-- end function \?=\; +-- -- %%% END FUNCTION "?="; +-- ------------------------------------------------------------------- +-- -- %%% FUNCTION "?=" ( l, r : std_ulogic_vector ) RETURN std_ulogic IS +-- function \?=\ (l, r : STD_ULOGIC_VECTOR) return STD_ULOGIC is +-- alias lv : STD_ULOGIC_VECTOR(1 to l'length) is l; +-- alias rv : STD_ULOGIC_VECTOR(1 to r'length) is r; +-- variable result, result1 : STD_ULOGIC; +-- begin +-- if ((l'length < 1) or (r'length < 1)) then +-- report "STD_LOGIC_1164.""?="": null detected, returning X" +-- severity warning; +-- return 'X'; +-- end if; +-- if lv'length /= rv'length then +-- report "STD_LOGIC_1164.""?="": L'LENGTH /= R'LENGTH, returning X" +-- severity warning; +-- return 'X'; +-- else +-- result := '1'; +-- for i in lv'low to lv'high loop +-- result1 := match_logic_table(lv(i), rv(i)); +-- if result1 = 'U' then +-- return 'U'; +-- elsif result1 = 'X' or result = 'X' then +-- result := 'X'; +-- else +-- result := result and result1; +-- end if; +-- end loop; +-- return result; +-- end if; +-- end function \?=\; +-- -- %%% END FUNCTION "?="; +-- -- %%% FUNCTION "?/=" ( l, r : std_ulogic ) RETURN std_ulogic is +-- function \?/=\ (l, r : STD_ULOGIC) return STD_ULOGIC is +-- begin +-- return no_match_logic_table (l, r); +-- end function \?/=\; +-- -- %%% END FUNCTION "?/="; +-- -- %%% FUNCTION "?/=" ( l, r : std_logic_vector ) RETURN std_ulogic is +-- function \?/=\ (l, r : STD_LOGIC_VECTOR) return STD_ULOGIC is +-- alias lv : STD_LOGIC_VECTOR(1 to l'length) is l; +-- alias rv : STD_LOGIC_VECTOR(1 to r'length) is r; +-- variable result, result1 : STD_ULOGIC; -- result +-- begin +-- if ((l'length < 1) or (r'length < 1)) then +-- report "STD_LOGIC_1164.""?/="": null detected, returning X" +-- severity warning; +-- return 'X'; +-- end if; +-- if lv'length /= rv'length then +-- report "STD_LOGIC_1164.""?/="": L'LENGTH /= R'LENGTH, returning X" +-- severity warning; +-- return 'X'; +-- else +-- result := '0'; +-- for i in lv'low to lv'high loop +-- result1 := no_match_logic_table(lv(i), rv(i)); +-- if result1 = 'U' then +-- return 'U'; +-- elsif result1 = 'X' or result = 'X' then +-- result := 'X'; +-- else +-- result := result or result1; +-- end if; +-- end loop; +-- return result; +-- end if; +-- end function \?/=\; +-- -- %%% END FUNCTION "?/="; +-- -- %%% FUNCTION "?/=" ( l, r : std_ulogic_vector ) RETURN std_ulogic is +-- function \?/=\ (l, r : STD_ULOGIC_VECTOR) return STD_ULOGIC is +-- alias lv : STD_ULOGIC_VECTOR(1 to l'length) is l; +-- alias rv : STD_ULOGIC_VECTOR(1 to r'length) is r; +-- variable result, result1 : STD_ULOGIC; +-- begin +-- if ((l'length < 1) or (r'length < 1)) then +-- report "STD_LOGIC_1164.""?/="": null detected, returning X" +-- severity warning; +-- return 'X'; +-- end if; +-- if lv'length /= rv'length then +-- report "STD_LOGIC_1164.""?/="": L'LENGTH /= R'LENGTH, returning X" +-- severity warning; +-- return 'X'; +-- else +-- result := '0'; +-- for i in lv'low to lv'high loop +-- result1 := no_match_logic_table(lv(i), rv(i)); +-- if result1 = 'U' then +-- return 'U'; +-- elsif result1 = 'X' or result = 'X' then +-- result := 'X'; +-- else +-- result := result or result1; +-- end if; +-- end loop; +-- return result; +-- end if; +-- end function \?/=\; +-- -- %%% END FUNCTION "?/="; + -- %%% FUNCTION "?>" ( l, r : std_ulogic ) RETURN std_ulogic is + function \?>\ (l, r : STD_ULOGIC) return STD_ULOGIC is + variable lx, rx : STD_ULOGIC; + begin + if (l = '-') or (r = '-') then + report "STD_LOGIC_1164.""?>"": '-' found in compare string" + severity error; + return 'X'; + else + lx := to_x01 (l); + rx := to_x01 (r); + if lx = 'X' or rx = 'X' then + return 'X'; + elsif lx > rx then + return '1'; + else + return '0'; + end if; + end if; + end function \?>\; + -- %%% END FUNCTION "?>"; + + -- %%% FUNCTION "?>=" ( l, r : std_ulogic ) RETURN std_ulogic is + function \?>=\ (l, r : STD_ULOGIC) return STD_ULOGIC is + variable lx, rx : STD_ULOGIC; + begin + if (l = '-') or (r = '-') then + report "STD_LOGIC_1164.""?>="": '-' found in compare string" + severity error; + return 'X'; + else + lx := to_x01 (l); + rx := to_x01 (r); + if lx = 'X' or rx = 'X' then + return 'X'; + elsif lx >= rx then + return '1'; + else + return '0'; + end if; + end if; + end function \?>=\; + -- %%% END FUNCTION "?/>="; + + -- %%% FUNCTION "?<" ( l, r : std_ulogic ) RETURN std_ulogic is + function \?<\ (l, r : STD_ULOGIC) return STD_ULOGIC is + variable lx, rx : STD_ULOGIC; + begin + if (l = '-') or (r = '-') then + report "STD_LOGIC_1164.""?<"": '-' found in compare string" + severity error; + return 'X'; + else + lx := to_x01 (l); + rx := to_x01 (r); + if lx = 'X' or rx = 'X' then + return 'X'; + elsif lx < rx then + return '1'; + else + return '0'; + end if; + end if; + end function \?<\; + -- %%% END FUNCTION "?/<"; + + -- %%% FUNCTION "?<=" ( l, r : std_ulogic ) RETURN std_ulogic is + function \?<=\ (l, r : STD_ULOGIC) return STD_ULOGIC is + variable lx, rx : STD_ULOGIC; + begin + if (l = '-') or (r = '-') then + report "STD_LOGIC_1164.""?<="": '-' found in compare string" + severity error; + return 'X'; + else + lx := to_x01 (l); + rx := to_x01 (r); + if lx = 'X' or rx = 'X' then + return 'X'; + elsif lx <= rx then + return '1'; + else + return '0'; + end if; + end if; + end function \?<=\; + -- %%% END FUNCTION "?/<="; + + -- "??" operator, converts a std_ulogic to a boolean. +-- %%% FUNCTION "??" + function \??\ (S : STD_ULOGIC) return BOOLEAN is + begin + return S = '1' or S = 'H'; + end function \??\; +-- %%% END FUNCTION "??"; + + -- rtl_synthesis off +-- pragma synthesis_off + ----------------------------------------------------------------------------- + -- This section copied from "std_logic_textio" + ----------------------------------------------------------------------------- + -- Type and constant definitions used to map STD_ULOGIC values + -- into/from character values. + type MVL9plus is ('U', 'X', '0', '1', 'Z', 'W', 'L', 'H', '-', error); + type char_indexed_by_MVL9 is array (STD_ULOGIC) of CHARACTER; + type MVL9_indexed_by_char is array (CHARACTER) of STD_ULOGIC; + type MVL9plus_indexed_by_char is array (CHARACTER) of MVL9plus; + constant MVL9_to_char : char_indexed_by_MVL9 := "UX01ZWLH-"; + constant char_to_MVL9 : MVL9_indexed_by_char := + ('U' => 'U', 'X' => 'X', '0' => '0', '1' => '1', 'Z' => 'Z', + 'W' => 'W', 'L' => 'L', 'H' => 'H', '-' => '-', others => 'U'); + constant char_to_MVL9plus : MVL9plus_indexed_by_char := + ('U' => 'U', 'X' => 'X', '0' => '0', '1' => '1', 'Z' => 'Z', + 'W' => 'W', 'L' => 'L', 'H' => 'H', '-' => '-', others => error); + + constant NBSP : CHARACTER := CHARACTER'val(160); -- space character + constant NUS : STRING(2 to 1) := (others => ' '); -- null STRING + + -- purpose: Skips white space + procedure skip_whitespace ( + L : inout LINE) is + variable readOk : BOOLEAN; + variable c : CHARACTER; + begin + while L /= null and L.all'length /= 0 loop + if (L.all(1) = ' ' or L.all(1) = NBSP or L.all(1) = HT) then + read (l, c, readOk); + else + exit; + end if; + end loop; + end procedure skip_whitespace; + + procedure READ (L : inout LINE; VALUE : out STD_ULOGIC; + GOOD : out BOOLEAN) is + variable c : CHARACTER; + variable readOk : BOOLEAN; + begin + VALUE := 'U'; -- initialize to a "U" + Skip_whitespace (L); + read (l, c, readOk); + if not readOk then + good := false; + else + if char_to_MVL9plus(c) = error then + good := false; + else + VALUE := char_to_MVL9(c); + good := true; + end if; + end if; + end procedure READ; + + procedure READ (L : inout LINE; VALUE : out STD_ULOGIC_VECTOR; + GOOD : out BOOLEAN) is + variable m : STD_ULOGIC; + variable c : CHARACTER; + variable mv : STD_ULOGIC_VECTOR(0 to VALUE'length-1); + variable readOk : BOOLEAN; + variable i : INTEGER; + variable lastu : BOOLEAN := false; -- last character was an "_" + begin + VALUE := (VALUE'range => 'U'); -- initialize to a "U" + Skip_whitespace (L); + if VALUE'length > 0 then + read (l, c, readOk); + i := 0; + good := false; + while i < VALUE'length loop + if not readOk then -- Bail out if there was a bad read + return; + elsif c = '_' then + if i = 0 then -- Begins with an "_" + return; + elsif lastu then -- "__" detected + return; + else + lastu := true; + end if; + elsif (char_to_MVL9plus(c) = error) then -- Illegal character + return; + else + mv(i) := char_to_MVL9(c); + i := i + 1; + if i > mv'high then -- reading done + good := true; + VALUE := mv; + return; + end if; + lastu := false; + end if; + read(L, c, readOk); + end loop; + else + good := true; -- read into a null array + end if; + end procedure READ; + + procedure READ (L : inout LINE; VALUE : out STD_ULOGIC) is + variable c : CHARACTER; + variable readOk : BOOLEAN; + begin + VALUE := 'U'; -- initialize to a "U" + Skip_whitespace (L); + read (l, c, readOk); + if not readOk then + report "STD_LOGIC_1164.READ(STD_ULOGIC) " + & "End of string encountered" + severity error; + return; + elsif char_to_MVL9plus(c) = error then + report + "STD_LOGIC_1164.READ(STD_ULOGIC) Error: Character '" & + c & "' read, expected STD_ULOGIC literal." + severity error; + else + VALUE := char_to_MVL9(c); + end if; + end procedure READ; + + procedure READ (L : inout LINE; VALUE : out STD_ULOGIC_VECTOR) is + variable m : STD_ULOGIC; + variable c : CHARACTER; + variable readOk : BOOLEAN; + variable mv : STD_ULOGIC_VECTOR(0 to VALUE'length-1); + variable i : INTEGER; + variable lastu : BOOLEAN := false; -- last character was an "_" + begin + VALUE := (VALUE'range => 'U'); -- initialize to a "U" + Skip_whitespace (L); + if VALUE'length > 0 then -- non Null input string + read (l, c, readOk); + i := 0; + while i < VALUE'length loop + if readOk = false then -- Bail out if there was a bad read + report "STD_LOGIC_1164.READ(STD_ULOGIC_VECTOR) " + & "End of string encountered" + severity error; + return; + elsif c = '_' then + if i = 0 then + report "STD_LOGIC_1164.READ(STD_ULOGIC_VECTOR) " + & "String begins with an ""_""" severity error; + return; + elsif lastu then + report "STD_LOGIC_1164.READ(STD_ULOGIC_VECTOR) " + & "Two underscores detected in input string ""__""" + severity error; + return; + else + lastu := true; + end if; + elsif c = ' ' or c = NBSP or c = HT then -- reading done. + report "STD_LOGIC_1164.READ(STD_ULOGIC_VECTOR) " + & "Short read, Space encounted in input string" + severity error; + return; + elsif char_to_MVL9plus(c) = error then + report "STD_LOGIC_1164.READ(STD_ULOGIC_VECTOR) " + & "Error: Character '" & + c & "' read, expected STD_ULOGIC literal." + severity error; + return; + else + mv(i) := char_to_MVL9(c); + i := i + 1; + if i > mv'high then + VALUE := mv; + return; + end if; + lastu := false; + end if; + read(L, c, readOk); + end loop; + end if; + end procedure READ; + + procedure WRITE (L : inout LINE; VALUE : in STD_ULOGIC; + JUSTIFIED : in SIDE := right; FIELD : in WIDTH := 0) is + begin + write(l, MVL9_to_char(VALUE), justified, field); + end procedure WRITE; + + procedure WRITE (L : inout LINE; VALUE : in STD_ULOGIC_VECTOR; + JUSTIFIED : in SIDE := right; FIELD : in WIDTH := 0) is + variable s : STRING(1 to VALUE'length); + variable m : STD_ULOGIC_VECTOR(1 to VALUE'length) := VALUE; + begin + for i in 1 to VALUE'length loop + s(i) := MVL9_to_char(m(i)); + end loop; + write(l, s, justified, field); + end procedure WRITE; + + -- Read and Write procedures for STD_LOGIC_VECTOR + + procedure READ (L : inout LINE; VALUE : out STD_LOGIC_VECTOR; + GOOD : out BOOLEAN) is + variable ivalue : STD_ULOGIC_VECTOR (VALUE'range); + begin + READ (L => L, VALUE => ivalue, GOOD => GOOD); + VALUE := to_stdlogicvector (ivalue); + end procedure READ; + + procedure READ (L : inout LINE; VALUE : out STD_LOGIC_VECTOR) is + variable ivalue : STD_ULOGIC_VECTOR (VALUE'range); + begin + READ (L => L, VALUE => ivalue); + VALUE := to_stdlogicvector (ivalue); + end procedure READ; + + procedure WRITE (L : inout LINE; VALUE : in STD_LOGIC_VECTOR; + JUSTIFIED : in SIDE := right; FIELD : in WIDTH := 0) is + variable s : STRING(1 to VALUE'length); + variable m : STD_LOGIC_VECTOR(1 to VALUE'length) := VALUE; + begin + for i in 1 to VALUE'length loop + s(i) := MVL9_to_char(m(i)); + end loop; + write(L, s, justified, field); + end procedure WRITE; + + ----------------------------------------------------------------------- + -- Alias for bread and bwrite are provided with call out the read and + -- write functions. + ----------------------------------------------------------------------- + + -- Hex Read and Write procedures for STD_ULOGIC_VECTOR. + -- Modified from the original to be more forgiving. + + procedure Char2QuadBits (C : CHARACTER; + RESULT : out STD_ULOGIC_VECTOR(3 downto 0); + GOOD : out BOOLEAN; + ISSUE_ERROR : in BOOLEAN) is + begin + case c is + when '0' => result := x"0"; good := true; + when '1' => result := x"1"; good := true; + when '2' => result := x"2"; good := true; + when '3' => result := x"3"; good := true; + when '4' => result := x"4"; good := true; + when '5' => result := x"5"; good := true; + when '6' => result := x"6"; good := true; + when '7' => result := x"7"; good := true; + when '8' => result := x"8"; good := true; + when '9' => result := x"9"; good := true; + when 'A' | 'a' => result := x"A"; good := true; + when 'B' | 'b' => result := x"B"; good := true; + when 'C' | 'c' => result := x"C"; good := true; + when 'D' | 'd' => result := x"D"; good := true; + when 'E' | 'e' => result := x"E"; good := true; + when 'F' | 'f' => result := x"F"; good := true; + when 'Z' => result := "ZZZZ"; good := true; + when 'X' => result := "XXXX"; good := true; + when others => + assert not ISSUE_ERROR + report + "STD_LOGIC_1164.HREAD Read a '" & c & + "', expected a Hex character (0-F)." + severity error; + good := false; + end case; + end procedure Char2QuadBits; + + procedure HREAD (L : inout LINE; VALUE : out STD_ULOGIC_VECTOR; + GOOD : out BOOLEAN) is + variable ok : BOOLEAN; + variable c : CHARACTER; + constant ne : INTEGER := (VALUE'length+3)/4; + constant pad : INTEGER := ne*4 - VALUE'length; + variable sv : STD_ULOGIC_VECTOR(0 to ne*4 - 1); + variable i : INTEGER; + variable lastu : BOOLEAN := false; -- last character was an "_" + begin + VALUE := (VALUE'range => 'U'); -- initialize to a "U" + Skip_whitespace (L); + if VALUE'length > 0 then + read (l, c, ok); + i := 0; + while i < ne loop + -- Bail out if there was a bad read + if not ok then + good := false; + return; + elsif c = '_' then + if i = 0 then + good := false; -- Begins with an "_" + return; + elsif lastu then + good := false; -- "__" detected + return; + else + lastu := true; + end if; + else + Char2QuadBits(c, sv(4*i to 4*i+3), ok, false); + if not ok then + good := false; + return; + end if; + i := i + 1; + lastu := false; + end if; + if i < ne then + read(L, c, ok); + end if; + end loop; + if or_reduce (sv (0 to pad-1)) = '1' then -- %%% replace with "or" + good := false; -- vector was truncated. + else + good := true; + VALUE := sv (pad to sv'high); + end if; + else + good := true; -- Null input string, skips whitespace + end if; + end procedure HREAD; + + procedure HREAD (L : inout LINE; VALUE : out STD_ULOGIC_VECTOR) is + variable ok : BOOLEAN; + variable c : CHARACTER; + constant ne : INTEGER := (VALUE'length+3)/4; + constant pad : INTEGER := ne*4 - VALUE'length; + variable sv : STD_ULOGIC_VECTOR(0 to ne*4 - 1); + variable i : INTEGER; + variable lastu : BOOLEAN := false; -- last character was an "_" + begin + VALUE := (VALUE'range => 'U'); -- initialize to a "U" + Skip_whitespace (L); + if VALUE'length > 0 then -- non Null input string + read (l, c, ok); + i := 0; + while i < ne loop + -- Bail out if there was a bad read + if not ok then + report "STD_LOGIC_1164.HREAD " + & "End of string encountered" + severity error; + return; + end if; + if c = '_' then + if i = 0 then + report "STD_LOGIC_1164.HREAD " + & "String begins with an ""_""" severity error; + return; + elsif lastu then + report "STD_LOGIC_1164.HREAD " + & "Two underscores detected in input string ""__""" + severity error; + return; + else + lastu := true; + end if; + else + Char2QuadBits(c, sv(4*i to 4*i+3), ok, true); + if not ok then + return; + end if; + i := i + 1; + lastu := false; + end if; + if i < ne then + read(L, c, ok); + end if; + end loop; + if or_reduce (sv (0 to pad-1)) = '1' then -- %%% replace with "or" + report "STD_LOGIC_1164.HREAD Vector truncated" + severity error; + else + VALUE := sv (pad to sv'high); + end if; + end if; + end procedure HREAD; + + procedure HWRITE (L : inout LINE; VALUE : in STD_ULOGIC_VECTOR; + JUSTIFIED : in SIDE := right; FIELD : in WIDTH := 0) is + begin + write (L, to_hstring (VALUE), JUSTIFIED, FIELD); + end procedure HWRITE; + + + -- Octal Read and Write procedures for STD_ULOGIC_VECTOR. + -- Modified from the original to be more forgiving. + + procedure Char2TriBits (C : CHARACTER; + RESULT : out STD_ULOGIC_VECTOR(2 downto 0); + GOOD : out BOOLEAN; + ISSUE_ERROR : in BOOLEAN) is + begin + case c is + when '0' => result := o"0"; good := true; + when '1' => result := o"1"; good := true; + when '2' => result := o"2"; good := true; + when '3' => result := o"3"; good := true; + when '4' => result := o"4"; good := true; + when '5' => result := o"5"; good := true; + when '6' => result := o"6"; good := true; + when '7' => result := o"7"; good := true; + when 'Z' => result := "ZZZ"; good := true; + when 'X' => result := "XXX"; good := true; + when others => + assert not ISSUE_ERROR + report + "STD_LOGIC_1164.OREAD Error: Read a '" & c & + "', expected an Octal character (0-7)." + severity error; + good := false; + end case; + end procedure Char2TriBits; + + procedure OREAD (L : inout LINE; VALUE : out STD_ULOGIC_VECTOR; + GOOD : out BOOLEAN) is + variable ok : BOOLEAN; + variable c : CHARACTER; + constant ne : INTEGER := (VALUE'length+2)/3; + constant pad : INTEGER := ne*3 - VALUE'length; + variable sv : STD_ULOGIC_VECTOR(0 to ne*3 - 1); + variable i : INTEGER; + variable lastu : BOOLEAN := false; -- last character was an "_" + begin + VALUE := (VALUE'range => 'U'); -- initialize to a "U" + Skip_whitespace (L); + if VALUE'length > 0 then + read (l, c, ok); + i := 0; + while i < ne loop + -- Bail out if there was a bad read + if not ok then + good := false; + return; + elsif c = '_' then + if i = 0 then + good := false; -- Begins with an "_" + return; + elsif lastu then + good := false; -- "__" detected + return; + else + lastu := true; + end if; + else + Char2TriBits(c, sv(3*i to 3*i+2), ok, false); + if not ok then + good := false; + return; + end if; + i := i + 1; + lastu := false; + end if; + if i < ne then + read(L, c, ok); + end if; + end loop; + if or_reduce (sv (0 to pad-1)) = '1' then -- %%% replace with "or" + good := false; -- vector was truncated. + else + good := true; + VALUE := sv (pad to sv'high); + end if; + else + good := true; -- read into a null array + end if; + end procedure OREAD; + + procedure OREAD (L : inout LINE; VALUE : out STD_ULOGIC_VECTOR) is + variable c : CHARACTER; + variable ok : BOOLEAN; + constant ne : INTEGER := (VALUE'length+2)/3; + constant pad : INTEGER := ne*3 - VALUE'length; + variable sv : STD_ULOGIC_VECTOR(0 to ne*3 - 1); + variable i : INTEGER; + variable lastu : BOOLEAN := false; -- last character was an "_" + begin + VALUE := (VALUE'range => 'U'); -- initialize to a "U" + Skip_whitespace (L); + if VALUE'length > 0 then + read (l, c, ok); + i := 0; + while i < ne loop + -- Bail out if there was a bad read + if not ok then + report "STD_LOGIC_1164.OREAD " + & "End of string encountered" + severity error; + return; + elsif c = '_' then + if i = 0 then + report "STD_LOGIC_1164.OREAD " + & "String begins with an ""_""" severity error; + return; + elsif lastu then + report "STD_LOGIC_1164.OREAD " + & "Two underscores detected in input string ""__""" + severity error; + return; + else + lastu := true; + end if; + else + Char2TriBits(c, sv(3*i to 3*i+2), ok, true); + if not ok then + return; + end if; + i := i + 1; + lastu := false; + end if; + if i < ne then + read(L, c, ok); + end if; + end loop; + if or_reduce (sv (0 to pad-1)) = '1' then -- %%% replace with "or" + report "STD_LOGIC_1164.OREAD Vector truncated" + severity error; + else + VALUE := sv (pad to sv'high); + end if; + end if; + end procedure OREAD; + + procedure OWRITE (L : inout LINE; VALUE : in STD_ULOGIC_VECTOR; + JUSTIFIED : in SIDE := right; FIELD : in WIDTH := 0) is + begin + write (L, to_ostring(VALUE), JUSTIFIED, FIELD); + end procedure OWRITE; + + -- Hex Read and Write procedures for STD_LOGIC_VECTOR + + procedure HREAD (L : inout LINE; VALUE : out STD_LOGIC_VECTOR; + GOOD : out BOOLEAN) is + variable ivalue : STD_ULOGIC_VECTOR (VALUE'range); + begin + HREAD (L => L, VALUE => ivalue, GOOD => GOOD); + VALUE := to_stdlogicvector (ivalue); + end procedure HREAD; + + procedure HREAD (L : inout LINE; VALUE : out STD_LOGIC_VECTOR) is + variable ivalue : STD_ULOGIC_VECTOR (VALUE'range); + begin + HREAD (L => L, VALUE => ivalue); + VALUE := to_stdlogicvector (ivalue); + end procedure HREAD; + + procedure HWRITE (L : inout LINE; VALUE : in STD_LOGIC_VECTOR; + JUSTIFIED : in SIDE := right; FIELD : in WIDTH := 0) is + begin + write (L, to_hstring(VALUE), JUSTIFIED, FIELD); + end procedure HWRITE; + + -- Octal Read and Write procedures for STD_LOGIC_VECTOR + + procedure OREAD (L : inout LINE; VALUE : out STD_LOGIC_VECTOR; + GOOD : out BOOLEAN) is + variable ivalue : STD_ULOGIC_VECTOR (VALUE'range); + begin + OREAD (L => L, VALUE => ivalue, GOOD => GOOD); + VALUE := to_stdlogicvector (ivalue); + end procedure OREAD; + + procedure OREAD (L : inout LINE; VALUE : out STD_LOGIC_VECTOR) is + variable ivalue : STD_ULOGIC_VECTOR (VALUE'range); + begin + OREAD (L => L, VALUE => ivalue); + VALUE := to_stdlogicvector (ivalue); + end procedure OREAD; + + procedure OWRITE (L : inout LINE; VALUE : in STD_LOGIC_VECTOR; + JUSTIFIED : in SIDE := right; FIELD : in WIDTH := 0) is + begin + write (L, to_ostring(VALUE), JUSTIFIED, FIELD); + end procedure OWRITE; + + ----------------------------------------------------------------------------- + -- New string functions for vhdl-200x fast track + ----------------------------------------------------------------------------- + function to_string (value : STD_ULOGIC) return STRING is + variable result : STRING (1 to 1); + begin + result (1) := MVL9_to_char (value); + return result; + end function to_string; + ------------------------------------------------------------------- + -- TO_STRING (an alias called "to_bstring" is provide) + ------------------------------------------------------------------- + function to_string (value : STD_ULOGIC_VECTOR) return STRING is + alias ivalue : STD_ULOGIC_VECTOR(1 to value'length) is value; + variable result : STRING(1 to value'length); + begin + if value'length < 1 then + return NUS; + else + for i in ivalue'range loop + result(i) := MVL9_to_char(iValue(i)); + end loop; + return result; + end if; + end function to_string; + + ------------------------------------------------------------------- + -- TO_HSTRING + ------------------------------------------------------------------- + function to_hstring (value : STD_ULOGIC_VECTOR) return STRING is + constant ne : INTEGER := (value'length+3)/4; + variable pad : STD_ULOGIC_VECTOR(0 to (ne*4 - value'length) - 1); + variable ivalue : STD_ULOGIC_VECTOR(0 to ne*4 - 1); + variable result : STRING(1 to ne); + variable quad : STD_ULOGIC_VECTOR(0 to 3); + begin + if value'length < 1 then + return NUS; + else + if value (value'left) = 'Z' then + pad := (others => 'Z'); + else + pad := (others => '0'); + end if; + ivalue := pad & value; + for i in 0 to ne-1 loop + quad := To_X01Z(ivalue(4*i to 4*i+3)); + case quad is + when x"0" => result(i+1) := '0'; + when x"1" => result(i+1) := '1'; + when x"2" => result(i+1) := '2'; + when x"3" => result(i+1) := '3'; + when x"4" => result(i+1) := '4'; + when x"5" => result(i+1) := '5'; + when x"6" => result(i+1) := '6'; + when x"7" => result(i+1) := '7'; + when x"8" => result(i+1) := '8'; + when x"9" => result(i+1) := '9'; + when x"A" => result(i+1) := 'A'; + when x"B" => result(i+1) := 'B'; + when x"C" => result(i+1) := 'C'; + when x"D" => result(i+1) := 'D'; + when x"E" => result(i+1) := 'E'; + when x"F" => result(i+1) := 'F'; + when "ZZZZ" => result(i+1) := 'Z'; + when others => result(i+1) := 'X'; + end case; + end loop; + return result; + end if; + end function to_hstring; + + ------------------------------------------------------------------- + -- TO_OSTRING + ------------------------------------------------------------------- + function to_ostring (value : STD_ULOGIC_VECTOR) return STRING is + constant ne : INTEGER := (value'length+2)/3; + variable pad : STD_ULOGIC_VECTOR(0 to (ne*3 - value'length) - 1); + variable ivalue : STD_ULOGIC_VECTOR(0 to ne*3 - 1); + variable result : STRING(1 to ne); + variable tri : STD_ULOGIC_VECTOR(0 to 2); + begin + if value'length < 1 then + return NUS; + else + if value (value'left) = 'Z' then + pad := (others => 'Z'); + else + pad := (others => '0'); + end if; + ivalue := pad & value; + for i in 0 to ne-1 loop + tri := To_X01Z(ivalue(3*i to 3*i+2)); + case tri is + when o"0" => result(i+1) := '0'; + when o"1" => result(i+1) := '1'; + when o"2" => result(i+1) := '2'; + when o"3" => result(i+1) := '3'; + when o"4" => result(i+1) := '4'; + when o"5" => result(i+1) := '5'; + when o"6" => result(i+1) := '6'; + when o"7" => result(i+1) := '7'; + when "ZZZ" => result(i+1) := 'Z'; + when others => result(i+1) := 'X'; + end case; + end loop; + return result; + end if; + end function to_ostring; + + function to_string (value : STD_LOGIC_VECTOR) return STRING is + begin + return to_string (to_stdulogicvector (value)); + end function to_string; + + function to_hstring (value : STD_LOGIC_VECTOR) return STRING is + begin + return to_hstring (to_stdulogicvector (value)); + end function to_hstring; + + function to_ostring (value : STD_LOGIC_VECTOR) return STRING is + begin + return to_ostring (to_stdulogicvector (value)); + end function to_ostring; + + -- rtl_synthesis on +-- pragma synthesis_on + function maximum (L, R : STD_ULOGIC_VECTOR) return STD_ULOGIC_VECTOR is + begin -- function maximum + if L > R then return L; + else return R; + end if; + end function maximum; + + -- std_logic_vector output + function minimum (L, R : STD_ULOGIC_VECTOR) return STD_ULOGIC_VECTOR is + begin -- function minimum + if L > R then return R; + else return L; + end if; + end function minimum; + + function maximum (L, R : STD_LOGIC_VECTOR) return STD_LOGIC_VECTOR is + begin -- function maximum + if L > R then return L; + else return R; + end if; + end function maximum; + + -- std_logic_vector output + function minimum (L, R : STD_LOGIC_VECTOR) return STD_LOGIC_VECTOR is + begin -- function minimum + if L > R then return R; + else return L; + end if; + end function minimum; + + function maximum (L, R : STD_ULOGIC) return STD_ULOGIC is + begin -- function maximum + if L > R then return L; + else return R; + end if; + end function maximum; + + -- std_logic_vector output + function minimum (L, R : STD_ULOGIC) return STD_ULOGIC is + begin -- function minimum + if L > R then return R; + else return L; + end if; + end function minimum; +end package body std_logic_1164_additions; |
