Subversion Repositories mod_mult_exp

 
--------------------------------------------------------------------------------
--
-- BLK MEM GEN v7_1 Core - Testbench Package 
--
--------------------------------------------------------------------------------
--
-- (c) Copyright 2006_3010 Xilinx, Inc. All rights reserved.
--
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--------------------------------------------------------------------------------
--
-- Filename: bmg_tb_pkg.vhd
--
-- Description:
--   BMG Testbench Package files
--
--------------------------------------------------------------------------------
-- Author: IP Solutions Division
--
-- History: Sep 12, 2011 - First Release
--------------------------------------------------------------------------------
--
--------------------------------------------------------------------------------
-- Library Declarations
--------------------------------------------------------------------------------
 
 
LIBRARY IEEE;
USE IEEE.STD_LOGIC_1164.ALL;
USE IEEE.STD_LOGIC_ARITH.ALL;
USE IEEE.STD_LOGIC_UNSIGNED.ALL;
 
PACKAGE BMG_TB_PKG IS
 
 FUNCTION DIVROUNDUP (
    DATA_VALUE : INTEGER;
    DIVISOR : INTEGER)
 RETURN INTEGER;
 ------------------------
 FUNCTION IF_THEN_ELSE (
    CONDITION : BOOLEAN;
    TRUE_CASE : STD_LOGIC_VECTOR;
    FALSE_CASE : STD_LOGIC_VECTOR)
  RETURN STD_LOGIC_VECTOR;
 ------------------------ 
 FUNCTION IF_THEN_ELSE (
   CONDITION : BOOLEAN;
   TRUE_CASE : STRING;
   FALSE_CASE :STRING)
 RETURN STRING;
 ------------------------ 
 FUNCTION IF_THEN_ELSE (
   CONDITION : BOOLEAN;
   TRUE_CASE : STD_LOGIC;
   FALSE_CASE :STD_LOGIC)
 RETURN STD_LOGIC;
 ------------------------ 
 FUNCTION IF_THEN_ELSE (
   CONDITION : BOOLEAN;
   TRUE_CASE : INTEGER;
   FALSE_CASE : INTEGER)
 RETURN INTEGER;
 ------------------------ 
 FUNCTION LOG2ROUNDUP (
      DATA_VALUE : INTEGER)
 RETURN INTEGER; 
 
END BMG_TB_PKG;
 
PACKAGE BODY BMG_TB_PKG IS
 
 FUNCTION DIVROUNDUP (
    DATA_VALUE : INTEGER;
    DIVISOR : INTEGER)
  RETURN INTEGER IS
    VARIABLE DIV                   : INTEGER;
  BEGIN
    DIV   := DATA_VALUE/DIVISOR;
    IF ( (DATA_VALUE MOD DIVISOR) /= 0) THEN
      DIV := DIV+1;
    END IF;
    RETURN DIV;
  END DIVROUNDUP;
  ---------------------------------
    FUNCTION IF_THEN_ELSE (
    CONDITION : BOOLEAN;
    TRUE_CASE : STD_LOGIC_VECTOR;
    FALSE_CASE : STD_LOGIC_VECTOR)
    RETURN STD_LOGIC_VECTOR IS
    BEGIN
       IF NOT CONDITION THEN
          RETURN FALSE_CASE;
       ELSE
          RETURN TRUE_CASE;
      END IF;
   END IF_THEN_ELSE;
  ---------------------------------
    FUNCTION IF_THEN_ELSE (
    CONDITION : BOOLEAN;
    TRUE_CASE : STD_LOGIC;
    FALSE_CASE : STD_LOGIC)
    RETURN STD_LOGIC IS
    BEGIN
       IF NOT CONDITION THEN
          RETURN FALSE_CASE;
       ELSE
          RETURN TRUE_CASE;
      END IF;
   END IF_THEN_ELSE;
  ---------------------------------
  FUNCTION IF_THEN_ELSE (
    CONDITION : BOOLEAN;
    TRUE_CASE : INTEGER;
    FALSE_CASE : INTEGER)
  RETURN INTEGER IS
    VARIABLE RETVAL : INTEGER := 0;
  BEGIN
    IF CONDITION=FALSE THEN
      RETVAL:=FALSE_CASE;
    ELSE
      RETVAL:=TRUE_CASE;
    END IF;
    RETURN RETVAL;
  END IF_THEN_ELSE;
  ---------------------------------
  FUNCTION IF_THEN_ELSE (
    CONDITION : BOOLEAN;
    TRUE_CASE : STRING;
    FALSE_CASE : STRING)
  RETURN STRING IS
    BEGIN
     IF NOT CONDITION THEN
        RETURN FALSE_CASE;
     ELSE
        RETURN TRUE_CASE;
     END IF;
 END IF_THEN_ELSE;
  ------------------------------- 
  FUNCTION LOG2ROUNDUP (
      DATA_VALUE : INTEGER)
    RETURN INTEGER IS
      VARIABLE WIDTH       : INTEGER := 0;
      VARIABLE CNT         : INTEGER := 1;
    BEGIN
      IF (DATA_VALUE <= 1) THEN
        WIDTH   := 1;
      ELSE
        WHILE (CNT < DATA_VALUE) LOOP
          WIDTH := WIDTH + 1;
          CNT   := CNT *2;
        END LOOP;
      END IF;
      RETURN WIDTH;
    END LOG2ROUNDUP;
 
END BMG_TB_PKG;