| Line 1... |
Line 1... |
//
|
/**********************************************************************
|
// File: signed_mult_const_fpga.v
|
* File : signed_mult_const_fpga.v
|
// Author: Ivan Rezki
|
* Author: Ivan Rezki
|
// Topic: RTL Core
|
* email : irezki@gmail.com
|
// 2-Dimensional Fast Hartley Transform
|
* Topic : RTL Core
|
//
|
* 2-Dimensional Fast Hartley Transform
|
|
*
|
// Signed Multiplier - constant sqrt(2) = 1.41421
|
*
|
|
* Function: Signed Multiplier - constant sqrt(2) = 1.41421
|
// 8 bit accuracy:
|
*
|
// 1.41421*a = (256*1.41421)*a/256 = 362.03776*a/256 = 362*a/256
|
* 8 bit accuracy:
|
// product = 362*a/2^8
|
* 1.41421*a = (256*1.41421)*a/256 = 362.03776*a/256 = 362*a/256
|
// wire [8:0] mult_constant = 9'd362;
|
* product = 362*a/2^8
|
|
* wire [8:0] mult_constant = 9'd362;
|
// 15 bit accuracy:
|
*
|
// 1.41421*a = (32768*1.41421)*a/32768 = 46340.95*a/32768
|
* 15 bit accuracy:
|
// product = 46341*a/2^15
|
* 1.41421*a = (32768*1.41421)*a/32768 = 46340.95*a/32768
|
// wire [15:0] mult_constant = 16'd46341;
|
* product = 46341*a/2^15
|
|
* wire [15:0] mult_constant = 16'd46341;
|
// 16 bit accuracy:
|
*
|
// 1.41421*a = (65536*1.41421)*a/65536 = 92681*a/65536
|
* 16 bit accuracy:
|
// product = 92681*a/2^16
|
* 1.41421*a = (65536*1.41421)*a/65536 = 92681*a/65536
|
// wire [16:0] mult_constant = 17'd92681;
|
* product = 92681*a/2^16
|
|
* wire [16:0] mult_constant = 17'd92681;
|
|
*
|
|
* RIGHT TO USE: This code example, or any portion thereof, may be
|
|
* used and distributed without restriction, provided that this entire
|
|
* comment block is included with the example.
|
|
*
|
|
* DISCLAIMER: THIS CODE EXAMPLE IS PROVIDED "AS IS" WITHOUT WARRANTY
|
|
* OF ANY KIND, EITHER EXPRESS OR IMPLIED, INCLUDING, BUT NOT LIMITED
|
|
* TO WARRANTIES OF MERCHANTABILITY, FITNESS OR CORRECTNESS. IN NO
|
|
* EVENT SHALL THE AUTHOR OR AUTHORS BE LIABLE FOR ANY DAMAGES,
|
|
* INCLUDING INCIDENTAL OR CONSEQUENTIAL DAMAGES, ARISING OUT OF THE
|
|
* USE OF THIS CODE.
|
|
**********************************************************************/
|
|
|
module signed_mult_const_fpga (
|
module signed_mult_const_fpga (
|
rstn,
|
rstn,
|
clk,
|
clk,
|
valid,
|
valid,
|
