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draunzer |
/////////////////////////////////////////////////////////////////////
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//// ////
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//// ////
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//// Trigonometric functions using double precision Floating Point Unit ////
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//// ////
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//// Author: Muni Aditya ////
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//// muni_aditya@yahoo.com ////
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//// ////
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/////////////////////////////////////////////////////////////////////
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//// ////
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//// Copyright (C) 2013 Muni Aditya ////
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//// muni_aditya@yahoo.com ////
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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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`timescale 1ns / 100ps
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`define INPUT_WIDTH 32
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module sine_lut (quad, enable, degrees, data, rst, clk);
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input [1:0] quad;
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input enable;
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input rst;
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input [`INPUT_WIDTH-1:0] degrees ;
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input clk;
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//////////////inputs/////////////////
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output reg [63:0] data;
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//////////////output/////////////////
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always@(posedge clk )
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// needs to be positive in first and second quadrants
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begin
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if (quad == 2'b10 || quad == 2'b11)
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begin
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data[63] <= 1'b1;
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end
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else
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begin
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data[63] <= 1'b0;
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end
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if(enable)
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case (degrees)
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//look up table
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`INPUT_WIDTH'd0 : data[62:0] <= 64'h0000000000000000;
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`INPUT_WIDTH'd1 : data[62:0] <= 64'h3f91df0b2b89dd1e;
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`INPUT_WIDTH'd2 : data[62:0] <= 64'h3fa1de58c9f7dc27;
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`INPUT_WIDTH'd3 : data[62:0] <= 64'h3faacbc748efc90d;
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`INPUT_WIDTH'd4 : data[62:0] <= 64'h3fb1db8f6d6a5128;
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`INPUT_WIDTH'd5 : data[62:0] <= 64'h3fb64fd6b8c28102;
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`INPUT_WIDTH'd6 : data[62:0] <= 64'h3fbac2609b3c576b;
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`INPUT_WIDTH'd7 : data[62:0] <= 64'h3fbf32d44c4f62d3;
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`INPUT_WIDTH'd8 : data[62:0] <= 64'h3fc1d06c968d9e19;
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`INPUT_WIDTH'd9 : data[62:0] <= 64'h3fc4060b67a85375;
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`INPUT_WIDTH'd10 : data[62:0] <= 64'h3fc63a1a7e0b7389;
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`INPUT_WIDTH'd11 : data[62:0] <= 64'h3fc86c6ddd76624f;
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`INPUT_WIDTH'd12 : data[62:0] <= 64'h3fca9cd9ac4258f5;
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`INPUT_WIDTH'd13 : data[62:0] <= 64'h3fcccb3236cdc674;
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`INPUT_WIDTH'd14 : data[62:0] <= 64'h3fcef74bf2e4b91d;
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`INPUT_WIDTH'd15 : data[62:0] <= 64'h3fd0907dc1930690;
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`INPUT_WIDTH'd16 : data[62:0] <= 64'h3fd1a40add328e29;
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`INPUT_WIDTH'd17 : data[62:0] <= 64'h3fd2b637cf83d5c7;
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`INPUT_WIDTH'd18 : data[62:0] <= 64'h3fd3c6ef372fe94f;
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`INPUT_WIDTH'd19 : data[62:0] <= 64'h3fd4d61bd000cddc;
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`INPUT_WIDTH'd20 : data[62:0] <= 64'h3fd5e3a8748a0bf5;
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`INPUT_WIDTH'd21 : data[62:0] <= 64'h3fd6ef801fced33c;
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`INPUT_WIDTH'd22 : data[62:0] <= 64'h3fd7f98deee59681;
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`INPUT_WIDTH'd23 : data[62:0] <= 64'h3fd901bd2298ffaa;
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`INPUT_WIDTH'd24 : data[62:0] <= 64'h3fda07f921061ad0;
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`INPUT_WIDTH'd25 : data[62:0] <= 64'h3fdb0c2d77379853;
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`INPUT_WIDTH'd26 : data[62:0] <= 64'h3fdc0e45dabe05c8;
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`INPUT_WIDTH'd27 : data[62:0] <= 64'h3fdd0e2e2b44de00;
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`INPUT_WIDTH'd28 : data[62:0] <= 64'h3fde0bd274245079;
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`INPUT_WIDTH'd29 : data[62:0] <= 64'h3fdf071eedefa0ed;
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`INPUT_WIDTH'd30 : data[62:0] <= 64'h3fdfffffffffffff;
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`INPUT_WIDTH'd31 : data[62:0] <= 64'h3fe07b3120fddf13;
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`INPUT_WIDTH'd32 : data[62:0] <= 64'h3fe0f5193eacdd2a;
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`INPUT_WIDTH'd33 : data[62:0] <= 64'h3fe16daed770771c;
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`INPUT_WIDTH'd34 : data[62:0] <= 64'h3fe1e4e88411fd12;
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`INPUT_WIDTH'd35 : data[62:0] <= 64'h3fe25abcf87c4978;
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`INPUT_WIDTH'd36 : data[62:0] <= 64'h3fe2cf2304755a5e;
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`INPUT_WIDTH'd37 : data[62:0] <= 64'h3fe342119455beb6;
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`INPUT_WIDTH'd38 : data[62:0] <= 64'h3fe3b37fb1bdc939;
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`INPUT_WIDTH'd39 : data[62:0] <= 64'h3fe4236484487abe;
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`INPUT_WIDTH'd40 : data[62:0] <= 64'h3fe491b7523c161c;
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`INPUT_WIDTH'd41 : data[62:0] <= 64'h3fe4fe6f81384fd4;
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`INPUT_WIDTH'd42 : data[62:0] <= 64'h3fe5698496e20bd8;
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`INPUT_WIDTH'd43 : data[62:0] <= 64'h3fe5d2ee398c9c2b;
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`INPUT_WIDTH'd44 : data[62:0] <= 64'h3fe63aa430e07310;
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`INPUT_WIDTH'd45 : data[62:0] <= 64'h3fe6a09e667f3bcc;
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`INPUT_WIDTH'd46 : data[62:0] <= 64'h3fe704d4e6a54d38;
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`INPUT_WIDTH'd47 : data[62:0] <= 64'h3fe7673fe0c86982;
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`INPUT_WIDTH'd48 : data[62:0] <= 64'h3fe7c7d7a833bec1;
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`INPUT_WIDTH'd49 : data[62:0] <= 64'h3fe82694b4a11c36;
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`INPUT_WIDTH'd50 : data[62:0] <= 64'h3fe8836fa2cf5039;
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`INPUT_WIDTH'd51 : data[62:0] <= 64'h3fe8de613515a327;
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`INPUT_WIDTH'd52 : data[62:0] <= 64'h3fe9376253f463d1;
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`INPUT_WIDTH'd53 : data[62:0] <= 64'h3fe98e6c0ea27a14;
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`INPUT_WIDTH'd54 : data[62:0] <= 64'h3fe9e3779b97f4a8;
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`INPUT_WIDTH'd55 : data[62:0] <= 64'h3fea367e59158747;
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`INPUT_WIDTH'd56 : data[62:0] <= 64'h3fea8779cda8eea5;
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`INPUT_WIDTH'd57 : data[62:0] <= 64'h3fead663a8ae2fdb;
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`INPUT_WIDTH'd58 : data[62:0] <= 64'h3feb2335c2cda945;
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`INPUT_WIDTH'd59 : data[62:0] <= 64'h3feb6dea1e76eadd;
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`INPUT_WIDTH'd60 : data[62:0] <= 64'h3febb67ae8584caa;
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`INPUT_WIDTH'd61 : data[62:0] <= 64'h3febfce277d339c6;
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`INPUT_WIDTH'd62 : data[62:0] <= 64'h3fec411b4f6d2707;
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`INPUT_WIDTH'd63 : data[62:0] <= 64'h3fec83201d3d2c6c;
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`INPUT_WIDTH'd64 : data[62:0] <= 64'h3fecc2ebbb5638ca;
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`INPUT_WIDTH'd65 : data[62:0] <= 64'h3fed0079302dd767;
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`INPUT_WIDTH'd66 : data[62:0] <= 64'h3fed3bc3aeff7f95;
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`INPUT_WIDTH'd67 : data[62:0] <= 64'h3fed74c6982c666f;
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`INPUT_WIDTH'd68 : data[62:0] <= 64'h3fedab7d7997cb57;
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`INPUT_WIDTH'd69 : data[62:0] <= 64'h3feddfe40effb805;
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`INPUT_WIDTH'd70 : data[62:0] <= 64'h3fee11f642522d1b;
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`INPUT_WIDTH'd71 : data[62:0] <= 64'h3fee41b02bfeb4ca;
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`INPUT_WIDTH'd72 : data[62:0] <= 64'h3fee6f0e134454ff;
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`INPUT_WIDTH'd73 : data[62:0] <= 64'h3fee9a0c6e7bdb1f;
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`INPUT_WIDTH'd74 : data[62:0] <= 64'h3feec2a7e35e7b80;
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`INPUT_WIDTH'd75 : data[62:0] <= 64'h3feee8dd4748bf15;
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`INPUT_WIDTH'd76 : data[62:0] <= 64'h3fef0ca99f79ba25;
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`INPUT_WIDTH'd77 : data[62:0] <= 64'h3fef2e0a214e870f;
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`INPUT_WIDTH'd78 : data[62:0] <= 64'h3fef4cfc327a0080;
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`INPUT_WIDTH'd79 : data[62:0] <= 64'h3fef697d6938b6c2;
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`INPUT_WIDTH'd80 : data[62:0] <= 64'h3fef838b8c811c17;
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`INPUT_WIDTH'd81 : data[62:0] <= 64'h3fef9b24942fe45c;
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`INPUT_WIDTH'd82 : data[62:0] <= 64'h3fefb046a930947a;
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`INPUT_WIDTH'd83 : data[62:0] <= 64'h3fefc2f025a23e8b;
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`INPUT_WIDTH'd84 : data[62:0] <= 64'h3fefd31f94f867c6;
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`INPUT_WIDTH'd85 : data[62:0] <= 64'h3fefe0d3b41815a2;
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`INPUT_WIDTH'd86 : data[62:0] <= 64'h3fefec0b7170fff6;
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`INPUT_WIDTH'd87 : data[62:0] <= 64'h3feff4c5ed12e61d;
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`INPUT_WIDTH'd88 : data[62:0] <= 64'h3feffb0278bf0567;
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`INPUT_WIDTH'd89 : data[62:0] <= 64'h3feffec097f5af8a;
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`INPUT_WIDTH'd90 : data[62:0] <= 64'h3ff0000000000000;
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default:data <= 64'h0;
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endcase
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else
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data <= 64'hxxxxxxxxxxxxxxx;
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end
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endmodule
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