URL
https://opencores.org/ocsvn/theia_gpu/theia_gpu/trunk
Subversion Repositories theia_gpu
[/] [theia_gpu/] [branches/] [icarus_version/] [rtl/] [Collaterals.v] - Rev 168
Go to most recent revision | Compare with Previous | Blame | View Log
`timescale 1ns / 1ps `include "aDefinitions.v" /********************************************************************************** Theia, Ray Cast Programable graphic Processing Unit. Copyright (C) 2010 Diego Valverde (diego.valverde.g@gmail.com) This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with this program; if not, write to the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. ***********************************************************************************/ //------------------------------------------------ module FFD_POSEDGE_ASYNC_RESET # ( parameter SIZE=`WIDTH ) ( input wire Clock, input wire Clear, input wire [SIZE-1:0] D, output reg [SIZE-1:0] Q ); always @(posedge Clock or posedge Clear) begin if (Clear) Q = 0; else Q = D; end endmodule //---------------------------------------------------- module FFD_POSEDGE_SYNCRONOUS_RESET # ( parameter SIZE=`WIDTH ) ( input wire Clock, input wire Reset, input wire Enable, input wire [SIZE-1:0] D, output reg [SIZE-1:0] Q ); always @ (posedge Clock) begin if ( Reset ) Q <= `WIDTH'b0; else begin if (Enable) Q <= D; end end//always endmodule //------------------------------------------------ module UPCOUNTER_POSEDGE # (parameter SIZE=`WIDTH) ( input wire Clock, Reset, input wire [SIZE-1:0] Initial, input wire Enable, output reg [SIZE-1:0] Q ); always @(posedge Clock ) begin if (Reset) Q <= Initial; else begin if (Enable) Q <= Q + 1; end end endmodule //---------------------------------------------------------------------- module SELECT_1_TO_N # ( parameter SEL_WIDTH=4, parameter OUTPUT_WIDTH=16 ) ( input wire [SEL_WIDTH-1:0] Sel, input wire En, output wire [OUTPUT_WIDTH-1:0] O ); reg[OUTPUT_WIDTH-1:0] shift; always @ ( * ) begin if (~En) shift = 1; else shift = (1 << Sel); end assign O = ( ~En ) ? 0 : shift ; //assign O = En & (1 << Sel); endmodule //---------------------------------------------------------------------- module MUXFULLPARALELL_2SEL_GENERIC # ( parameter SIZE=`WIDTH ) ( input wire [1:0] Sel, input wire [SIZE-1:0]I1, I2, I3,I4, output reg [SIZE-1:0] O1 ); always @( * ) begin case (Sel) 2'b00: O1 = I1; 2'b01: O1 = I2; 2'b10: O1 = I3; 2'b11: O1 = I4; default: O1 = SIZE-1'b0; endcase end endmodule //-------- module CIRCULAR_SHIFTLEFT_POSEDGE_EX # ( parameter SIZE=`WIDTH ) ( input wire Clock, input wire Reset, input wire[SIZE-1:0] Initial, input wire Enable, output wire[SIZE-1:0] O ); reg [SIZE-1:0] tmp; always @(posedge Clock) begin if (Reset) tmp <= Initial; else begin if (Enable) begin if (tmp[SIZE-1]) begin tmp <= Initial; end else begin tmp <= tmp << 1; end end end end assign O = tmp; endmodule //------------------------------------------------ module MUXFULLPARALELL_3SEL_WALKINGONE # ( parameter SIZE=`WIDTH ) ( input wire [2:0] Sel, input wire [SIZE-1:0]I1, I2, I3, output reg [SIZE-1:0] O1 ); always @( * ) begin case (Sel) 3'b001: O1 = I1; 3'b010: O1 = I2; 3'b100: O1 = I3; default: O1 = SIZE-1'b0; endcase end endmodule //------------------------------------------------ module SHIFTLEFT_POSEDGE # ( parameter SIZE=`WIDTH ) ( input wire Clock, input wire Reset, input wire[SIZE-1:0] Initial, input wire Enable, output wire[SIZE-1:0] O ); reg [SIZE-1:0] tmp; always @(posedge Clock) begin if (Reset) tmp <= Initial; else begin if (Enable) tmp <= tmp << 1; end end assign O = tmp; endmodule //------------------------------------------------ //------------------------------------------------ module CIRCULAR_SHIFTLEFT_POSEDGE # ( parameter SIZE=`WIDTH ) ( input wire Clock, input wire Reset, input wire[SIZE-1:0] Initial, input wire Enable, output wire[SIZE-1:0] O ); reg [SIZE-1:0] tmp; always @(posedge Clock) begin if (Reset || tmp[SIZE-1]) tmp <= Initial; else begin if (Enable) tmp <= tmp << 1; end end assign O = tmp; endmodule //----------------------------------------------------------- /* Sorry forgot how this flop is called. Any way Truth table is this Q S Q_next R 0 0 0 0 0 1 1 0 1 0 1 0 1 1 1 0 X X 0 1 The idea is that it toggles from 0 to 1 when S = 1, but if it gets another S = 1, it keeps the output to 1. */ module FFToggleOnce_1Bit ( input wire Clock, input wire Reset, input wire Enable, input wire S, output reg Q ); reg Q_next; always @ (negedge Clock) begin Q <= Q_next; end always @ ( posedge Clock ) begin if (Reset) Q_next <= 0; else if (Enable) Q_next <= (S && !Q) || Q; else Q_next <= Q; end endmodule //----------------------------------------------------------- module UpCounter_16E ( input wire Clock, input wire Reset, input wire [15:0] Initial, input wire Enable, output wire [15:0] Q ); reg [15:0] Temp; always @(posedge Clock or posedge Reset) begin if (Reset) Temp = Initial; else if (Enable) Temp = Temp + 1'b1; end assign Q = Temp; endmodule //----------------------------------------------------------- module UpCounter_32 ( input wire Clock, input wire Reset, input wire [31:0] Initial, input wire Enable, output wire [31:0] Q ); reg [31:0] Temp; always @(posedge Clock or posedge Reset) begin if (Reset) begin Temp = Initial; end else begin if (Enable) begin Temp = Temp + 1'b1; end end end assign Q = Temp; endmodule //----------------------------------------------------------- module UpCounter_3 ( input wire Clock, input wire Reset, input wire [2:0] Initial, input wire Enable, output wire [2:0] Q ); reg [2:0] Temp; always @(posedge Clock or posedge Reset) begin if (Reset) Temp = Initial; else if (Enable) Temp = Temp + 3'b1; end assign Q = Temp; endmodule module FFD32_POSEDGE ( input wire Clock, input wire[31:0] D, output reg[31:0] Q ); always @ (posedge Clock) Q <= D; endmodule //------------------------------------------------ module MUXFULLPARALELL_96bits_2SEL ( input wire Sel, input wire [95:0]I1, I2, output reg [95:0] O1 ); always @( * ) begin case (Sel) 1'b0: O1 = I1; 1'b1: O1 = I2; endcase end endmodule //------------------------------------------------ module MUXFULLPARALELL_16bits_2SEL_X ( input wire [1:0] Sel, input wire [15:0]I1, I2, I3, output reg [15:0] O1 ); always @( * ) begin case (Sel) 2'b00: O1 = I1; 2'b01: O1 = I2; 2'b10: O1 = I3; default: O1 = 16'b0; endcase end endmodule //------------------------------------------------ module MUXFULLPARALELL_16bits_2SEL ( input wire Sel, input wire [15:0]I1, I2, output reg [15:0] O1 ); always @( * ) begin case (Sel) 1'b0: O1 = I1; 1'b1: O1 = I2; endcase end endmodule //-------------------------------------------------------------- module FFT1 ( input wire D, input wire Clock, input wire Reset , output reg Q ); always @ ( posedge Clock or posedge Reset ) begin if (Reset) begin Q <= 1'b0; end else begin if (D) Q <= ! Q; end end//always endmodule //--------------------------------------------------------------
Go to most recent revision | Compare with Previous | Blame | View Log