107 lines
3.7 KiB
Coq
107 lines
3.7 KiB
Coq
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/////////////////////////////////////////////////////////////////////
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//// ////
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//// Discrete Cosine Transform Unit ////
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//// ////
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//// Author: Richard Herveille ////
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//// richard@asics.ws ////
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//// www.asics.ws ////
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//// ////
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/////////////////////////////////////////////////////////////////////
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//// ////
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//// Copyright (C) 2001 Richard Herveille ////
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//// richard@asics.ws ////
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//// ////
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//// This source file may be used and distributed without ////
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//// restriction provided that this copyright statement is not ////
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//// removed from the file and that any derivative work contains ////
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//// the original copyright notice and the associated disclaimer.////
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//// ////
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//// THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY ////
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//// EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED ////
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//// TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS ////
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//// FOR A PARTICULAR PURPOSE. IN NO EVENT SHALL THE AUTHOR ////
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//// OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, ////
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//// INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES ////
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//// (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE ////
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//// GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR ////
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//// BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF ////
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//// LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT ////
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//// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT ////
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//// OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE ////
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//// POSSIBILITY OF SUCH DAMAGE. ////
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//// ////
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/////////////////////////////////////////////////////////////////////
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// CVS Log
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//
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// $Id: dctu.v,v 1.3 2002-10-31 12:50:03 rherveille Exp $
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//
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// $Date: 2002-10-31 12:50:03 $
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// $Revision: 1.3 $
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// $Author: rherveille $
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// $Locker: $
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// $State: Exp $
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//
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// Change History:
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// $Log: not supported by cvs2svn $
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// Revision 1.2 2002/10/23 09:06:59 rherveille
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// Improved many files.
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// Fixed some bugs in Run-Length-Encoder.
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// Removed dependency on ud_cnt and ro_cnt.
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// Started (Motion)JPEG hardware encoder project.
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//
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//synopsys translate_off
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`include "timescale.v"
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//synopsys translate_on
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module dctu(clk, ena, ddgo, x, y, ddin, dout);
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parameter coef_width = 16;
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parameter di_width = 8;
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parameter [2:0] v = 0;
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parameter [2:0] u = 0;
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//
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// inputs & outputs
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//
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input clk;
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input ena;
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input ddgo; // double delayed go signal
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input [2:0] x, y;
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input [di_width:1] ddin; // delayed data input
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output [11:0] dout;
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//
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// variables
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//
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reg [ 31:0] coef;
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wire [coef_width +10:0] result;
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`include "dct_cos_table.v"
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//
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// module body
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//
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// hookup cosine-table
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always @(posedge clk)
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if(ena)
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coef <= #1 dct_cos_table(x, y, u, v);
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// hookup dct-mac unit
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dct_mac #(8, coef_width)
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macu (
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.clk(clk),
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.ena(ena),
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.dclr(ddgo),
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.din(ddin),
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.coef( coef[31:31 -coef_width +1] ),
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.result(result)
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);
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assign dout = result[coef_width +10: coef_width -1];
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endmodule
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