1 |
17 |
draunzer |
/////////////////////////////////////////////////////////////////////
|
2 |
|
|
//// ////
|
3 |
|
|
//// ////
|
4 |
|
|
//// Trigonometric functions using double precision Floating Point Unit ////
|
5 |
|
|
//// ////
|
6 |
|
|
//// Author: Muni Aditya ////
|
7 |
|
|
//// muni_aditya@yahoo.com ////
|
8 |
|
|
//// ////
|
9 |
|
|
/////////////////////////////////////////////////////////////////////
|
10 |
|
|
//// ////
|
11 |
|
|
//// Copyright (C) 2013 Muni Aditya ////
|
12 |
|
|
//// muni_aditya@yahoo.com ////
|
13 |
|
|
//// ////
|
14 |
|
|
//// This source file may be used and distributed without ////
|
15 |
|
|
//// restriction provided that this copyright statement is not ////
|
16 |
|
|
//// removed from the file and that any derivative work contains ////
|
17 |
|
|
//// the original copyright notice and the associated disclaimer.////
|
18 |
|
|
//// ////
|
19 |
|
|
//// THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY ////
|
20 |
|
|
//// EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED ////
|
21 |
|
|
//// TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS ////
|
22 |
|
|
//// FOR A PARTICULAR PURPOSE. IN NO EVENT SHALL THE AUTHOR ////
|
23 |
|
|
//// OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, ////
|
24 |
|
|
//// INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES ////
|
25 |
|
|
//// (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE ////
|
26 |
|
|
//// GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR ////
|
27 |
|
|
//// BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF ////
|
28 |
|
|
//// LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT ////
|
29 |
|
|
//// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT ////
|
30 |
|
|
//// OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE ////
|
31 |
|
|
//// POSSIBILITY OF SUCH DAMAGE. ////
|
32 |
|
|
//// ////
|
33 |
|
|
/////////////////////////////////////////////////////////////////////
|
34 |
|
|
|
35 |
|
|
|
36 |
|
|
`timescale 1ns / 100ps
|
37 |
|
|
|
38 |
|
|
`define INPUT_WIDTH 32
|
39 |
|
|
|
40 |
|
|
module cosecant_lut (quad, enable, degrees, data, rst, clk);
|
41 |
|
|
|
42 |
|
|
input [1:0] quad;
|
43 |
|
|
input enable;
|
44 |
|
|
input rst;
|
45 |
|
|
input [`INPUT_WIDTH-1:0] degrees ;
|
46 |
|
|
input clk;
|
47 |
|
|
|
48 |
|
|
//////////////inputs/////////////////
|
49 |
|
|
|
50 |
|
|
output reg [63:0] data;
|
51 |
|
|
|
52 |
|
|
//////////////output/////////////////
|
53 |
|
|
|
54 |
|
|
|
55 |
|
|
always@(posedge clk )
|
56 |
|
|
|
57 |
|
|
// needs to be positive in first and second quadrants
|
58 |
|
|
|
59 |
|
|
|
60 |
|
|
begin
|
61 |
|
|
if (quad == 2'b10 || quad == 2'b11)
|
62 |
|
|
begin
|
63 |
|
|
data[63] <= 1'b1;
|
64 |
|
|
end
|
65 |
|
|
|
66 |
|
|
else
|
67 |
|
|
begin
|
68 |
|
|
data[63] <= 1'b0;
|
69 |
|
|
end
|
70 |
|
|
|
71 |
|
|
if(enable)
|
72 |
|
|
case (degrees)
|
73 |
|
|
|
74 |
|
|
// look up table
|
75 |
|
|
|
76 |
|
|
`INPUT_WIDTH'd0 : data[62:0] <= 64'h7ff0000000000000;
|
77 |
|
|
`INPUT_WIDTH'd1 : data[62:0] <= 64'h404ca63b6cba7b71;
|
78 |
|
|
`INPUT_WIDTH'd2 : data[62:0] <= 64'h403ca7596e271c86;
|
79 |
|
|
`INPUT_WIDTH'd3 : data[62:0] <= 64'h40331b797e990dc0;
|
80 |
|
|
`INPUT_WIDTH'd4 : data[62:0] <= 64'h402cabd2100d036c;
|
81 |
|
|
`INPUT_WIDTH'd5 : data[62:0] <= 64'h4026f28a8ae3ab08;
|
82 |
|
|
`INPUT_WIDTH'd6 : data[62:0] <= 64'h4023222ff85e6006;
|
83 |
|
|
`INPUT_WIDTH'd7 : data[62:0] <= 64'h402069387b617567;
|
84 |
|
|
`INPUT_WIDTH'd8 : data[62:0] <= 64'h401cbdbe5febffb0;
|
85 |
|
|
`INPUT_WIDTH'd9 : data[62:0] <= 64'h401991df41de341d;
|
86 |
|
|
`INPUT_WIDTH'd10 : data[62:0] <= 64'h401708fb2129168e;
|
87 |
|
|
`INPUT_WIDTH'd11 : data[62:0] <= 64'h4014f69f90704701;
|
88 |
|
|
`INPUT_WIDTH'd12 : data[62:0] <= 64'h40133d2b00047f03;
|
89 |
|
|
`INPUT_WIDTH'd13 : data[62:0] <= 64'h4011c819f29be025;
|
90 |
|
|
`INPUT_WIDTH'd14 : data[62:0] <= 64'h401088c56499f439;
|
91 |
|
|
`INPUT_WIDTH'd15 : data[62:0] <= 64'h400ee8dd4748bf16;
|
92 |
|
|
`INPUT_WIDTH'd16 : data[62:0] <= 64'h400d060d6ac58d68;
|
93 |
|
|
`INPUT_WIDTH'd17 : data[62:0] <= 64'h400b5cc824ec982e;
|
94 |
|
|
`INPUT_WIDTH'd18 : data[62:0] <= 64'h4009e3779b97f4a8;
|
95 |
|
|
`INPUT_WIDTH'd19 : data[62:0] <= 64'h4008928aa26c4c08;
|
96 |
|
|
`INPUT_WIDTH'd20 : data[62:0] <= 64'h400763f38fb4cf95;
|
97 |
|
|
`INPUT_WIDTH'd21 : data[62:0] <= 64'h400652cbf905707a;
|
98 |
|
|
`INPUT_WIDTH'd22 : data[62:0] <= 64'h40055b11998752c1;
|
99 |
|
|
`INPUT_WIDTH'd23 : data[62:0] <= 64'h40047974b96de77f;
|
100 |
|
|
`INPUT_WIDTH'd24 : data[62:0] <= 64'h4003ab32fb93a3a7;
|
101 |
|
|
`INPUT_WIDTH'd25 : data[62:0] <= 64'h4002edfb187b1137;
|
102 |
|
|
`INPUT_WIDTH'd26 : data[62:0] <= 64'h40023fd71f682341;
|
103 |
|
|
`INPUT_WIDTH'd27 : data[62:0] <= 64'h40019f1b8c9526f0;
|
104 |
|
|
`INPUT_WIDTH'd28 : data[62:0] <= 64'h40010a59ff3c94be;
|
105 |
|
|
`INPUT_WIDTH'd29 : data[62:0] <= 64'h40008056af82561d;
|
106 |
|
|
`INPUT_WIDTH'd30 : data[62:0] <= 64'h4000000000000001;
|
107 |
|
|
`INPUT_WIDTH'd31 : data[62:0] <= 64'h3fff10cf62336e31;
|
108 |
|
|
`INPUT_WIDTH'd32 : data[62:0] <= 64'h3ffe317ab5700fce;
|
109 |
|
|
`INPUT_WIDTH'd33 : data[62:0] <= 64'h3ffd6093ce555fa8;
|
110 |
|
|
`INPUT_WIDTH'd34 : data[62:0] <= 64'h3ffc9cd7b485648a;
|
111 |
|
|
`INPUT_WIDTH'd35 : data[62:0] <= 64'h3ffbe52877982347;
|
112 |
|
|
`INPUT_WIDTH'd36 : data[62:0] <= 64'h3ffb38880b4603e4;
|
113 |
|
|
`INPUT_WIDTH'd37 : data[62:0] <= 64'h3ffa9613f8fd7862;
|
114 |
|
|
`INPUT_WIDTH'd38 : data[62:0] <= 64'h3ff9fd01bf93f3a3;
|
115 |
|
|
`INPUT_WIDTH'd39 : data[62:0] <= 64'h3ff96c9bc1d2abfe;
|
116 |
|
|
`INPUT_WIDTH'd40 : data[62:0] <= 64'h3ff8e43eaadf9334;
|
117 |
|
|
`INPUT_WIDTH'd41 : data[62:0] <= 64'h3ff863573463a809;
|
118 |
|
|
`INPUT_WIDTH'd42 : data[62:0] <= 64'h3ff7e9603e24eb24;
|
119 |
|
|
`INPUT_WIDTH'd43 : data[62:0] <= 64'h3ff775e129d20b11;
|
120 |
|
|
`INPUT_WIDTH'd44 : data[62:0] <= 64'h3ff7086c7026f77e;
|
121 |
|
|
`INPUT_WIDTH'd45 : data[62:0] <= 64'h3ff6a09e667f3bcd;
|
122 |
|
|
`INPUT_WIDTH'd46 : data[62:0] <= 64'h3ff63e1c2d781ada;
|
123 |
|
|
`INPUT_WIDTH'd47 : data[62:0] <= 64'h3ff5e092c2857578;
|
124 |
|
|
`INPUT_WIDTH'd48 : data[62:0] <= 64'h3ff587b62f6162b4;
|
125 |
|
|
`INPUT_WIDTH'd49 : data[62:0] <= 64'h3ff53340d31354d5;
|
126 |
|
|
`INPUT_WIDTH'd50 : data[62:0] <= 64'h3ff4e2f2c0fa463b;
|
127 |
|
|
`INPUT_WIDTH'd51 : data[62:0] <= 64'h3ff4969132d53892;
|
128 |
|
|
`INPUT_WIDTH'd52 : data[62:0] <= 64'h3ff44de60b3c3d86;
|
129 |
|
|
`INPUT_WIDTH'd53 : data[62:0] <= 64'h3ff408bf665efb99;
|
130 |
|
|
`INPUT_WIDTH'd54 : data[62:0] <= 64'h3ff3c6ef372fe94f;
|
131 |
|
|
`INPUT_WIDTH'd55 : data[62:0] <= 64'h3ff3884aef684af8;
|
132 |
|
|
`INPUT_WIDTH'd56 : data[62:0] <= 64'h3ff34cab310ac280;
|
133 |
|
|
`INPUT_WIDTH'd57 : data[62:0] <= 64'h3ff313eb883ae677;
|
134 |
|
|
`INPUT_WIDTH'd58 : data[62:0] <= 64'h3ff2ddea2c696f6a;
|
135 |
|
|
`INPUT_WIDTH'd59 : data[62:0] <= 64'h3ff2aa87c7f7612b;
|
136 |
|
|
`INPUT_WIDTH'd60 : data[62:0] <= 64'h3ff279a74590331d;
|
137 |
|
|
`INPUT_WIDTH'd61 : data[62:0] <= 64'h3ff24b2da2943b49;
|
138 |
|
|
`INPUT_WIDTH'd62 : data[62:0] <= 64'h3ff21f01c602373d;
|
139 |
|
|
`INPUT_WIDTH'd63 : data[62:0] <= 64'h3ff1f50c5b61511e;
|
140 |
|
|
`INPUT_WIDTH'd64 : data[62:0] <= 64'h3ff1cd37b13ce9c7;
|
141 |
|
|
`INPUT_WIDTH'd65 : data[62:0] <= 64'h3ff1a76f9ad128b7;
|
142 |
|
|
`INPUT_WIDTH'd66 : data[62:0] <= 64'h3ff183a154932d8b;
|
143 |
|
|
`INPUT_WIDTH'd67 : data[62:0] <= 64'h3ff161bb6b4a03f3;
|
144 |
|
|
`INPUT_WIDTH'd68 : data[62:0] <= 64'h3ff141ada5766663;
|
145 |
|
|
`INPUT_WIDTH'd69 : data[62:0] <= 64'h3ff12368eecf1f68;
|
146 |
|
|
`INPUT_WIDTH'd70 : data[62:0] <= 64'h3ff106df459ea073;
|
147 |
|
|
`INPUT_WIDTH'd71 : data[62:0] <= 64'h3ff0ec03a9d451e4;
|
148 |
|
|
`INPUT_WIDTH'd72 : data[62:0] <= 64'h3ff0d2ca0da1530d;
|
149 |
|
|
`INPUT_WIDTH'd73 : data[62:0] <= 64'h3ff0bb27477cf20f;
|
150 |
|
|
`INPUT_WIDTH'd74 : data[62:0] <= 64'h3ff0a51105712a50;
|
151 |
|
|
`INPUT_WIDTH'd75 : data[62:0] <= 64'h3ff0907dc1930690;
|
152 |
|
|
`INPUT_WIDTH'd76 : data[62:0] <= 64'h3ff07d64b78dea34;
|
153 |
|
|
`INPUT_WIDTH'd77 : data[62:0] <= 64'h3ff06bbddb2b91b8;
|
154 |
|
|
`INPUT_WIDTH'd78 : data[62:0] <= 64'h3ff05b81cfc51885;
|
155 |
|
|
`INPUT_WIDTH'd79 : data[62:0] <= 64'h3ff04ca9e08b8cb6;
|
156 |
|
|
`INPUT_WIDTH'd80 : data[62:0] <= 64'h3ff03f2ff9989907;
|
157 |
|
|
`INPUT_WIDTH'd81 : data[62:0] <= 64'h3ff0330ea1b99998;
|
158 |
|
|
`INPUT_WIDTH'd82 : data[62:0] <= 64'h3ff02840f4e91085;
|
159 |
|
|
`INPUT_WIDTH'd83 : data[62:0] <= 64'h3ff01ec29f6be927;
|
160 |
|
|
`INPUT_WIDTH'd84 : data[62:0] <= 64'h3ff0168fd9895209;
|
161 |
|
|
`INPUT_WIDTH'd85 : data[62:0] <= 64'h3ff00fa563d53203;
|
162 |
|
|
`INPUT_WIDTH'd86 : data[62:0] <= 64'h3ff00a008406617c;
|
163 |
|
|
`INPUT_WIDTH'd87 : data[62:0] <= 64'h3ff0059f0252e0bc;
|
164 |
|
|
`INPUT_WIDTH'd88 : data[62:0] <= 64'h3ff0027f274d432f;
|
165 |
|
|
`INPUT_WIDTH'd89 : data[62:0] <= 64'h3ff0009fba3f7835;
|
166 |
|
|
`INPUT_WIDTH'd90 : data[62:0] <= 64'h3ff0000000000000;
|
167 |
|
|
|
168 |
|
|
|
169 |
|
|
default:data <= 64'h0;
|
170 |
|
|
|
171 |
|
|
endcase
|
172 |
|
|
|
173 |
|
|
else
|
174 |
|
|
data <= 64'hxxxxxxxxxxxxxxx;
|
175 |
|
|
|
176 |
|
|
|
177 |
|
|
|
178 |
|
|
end
|
179 |
|
|
|
180 |
|
|
endmodule
|