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//=======================================================================
// Project Monophony
//   Wire-Frame 3D Graphics Accelerator IP Core
//
// File:
//   fm_3d_core.v
//
// Abstract:
//   22-bit floating point 1/x rom table
//
// Author:
//   Kenji Ishimaru (info.wf3d@gmail.com)
//
//======================================================================
//
// Copyright (c) 2015, Kenji Ishimaru
// All rights reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are met:
//
//  -Redistributions of source code must retain the above copyright notice,
//   this list of conditions and the following disclaimer.
//  -Redistributions in binary form must reproduce the above copyright notice,
//   this list of conditions and the following disclaimer in the documentation
//   and/or other materials provided with the distribution.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
// AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
// THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
// PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
// CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
// EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
// PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
// OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
// WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
// OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
// EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
//
// Revision History
 
module fm_3d_frcp_rom (
  clk_core,
  i_a,
  o_c
);
 
////////////////////////////
// I/O definition
////////////////////////////
    input         clk_core;
    input  [6:0]  i_a;
    output [31:0] o_c;
 
////////////////////////////
// reg
////////////////////////////
    reg    [31:0] r_c;
////////////////////////////
// assign
////////////////////////////
    assign o_c = r_c;
///////////////////////////////////////////
//  always statement
///////////////////////////////////////////
    always @(posedge clk_core) begin
        case (i_a)
            7'd0:   r_c <= 32'h800001fc;
            7'd1:   r_c <= 32'h7f0101f4;
            7'd2:   r_c <= 32'h7e0701ec;
            7'd3:   r_c <= 32'h7d1101e5;
            7'd4:   r_c <= 32'h7c1f01dd;
            7'd5:   r_c <= 32'h7b3001d6;
            7'd6:   r_c <= 32'h7a4401cf;
            7'd7:   r_c <= 32'h795c01c8;
            7'd8:   r_c <= 32'h787801c2;
            7'd9:   r_c <= 32'h779701bb;
            7'd10:  r_c <= 32'h76b901b5;
            7'd11:  r_c <= 32'h75de01af;
            7'd12:  r_c <= 32'h750701a8;
            7'd13:  r_c <= 32'h743201a2;
            7'd14:  r_c <= 32'h7361019d;
            7'd15:  r_c <= 32'h72920197;
            7'd16:  r_c <= 32'h71c70191;
            7'd17:  r_c <= 32'h70fe018c;
            7'd18:  r_c <= 32'h70380186;
            7'd19:  r_c <= 32'h6f740181;
            7'd20:  r_c <= 32'h6eb3017c;
            7'd21:  r_c <= 32'h6df50177;
            7'd22:  r_c <= 32'h6d3a0172;
            7'd23:  r_c <= 32'h6c80016d;
            7'd24:  r_c <= 32'h6bca0168;
            7'd25:  r_c <= 32'h6b150164;
            7'd26:  r_c <= 32'h6a63015f;
            7'd27:  r_c <= 32'h69b4015a;
            7'd28:  r_c <= 32'h69060156;
            7'd29:  r_c <= 32'h685b0152;
            7'd30:  r_c <= 32'h67b2014d;
            7'd31:  r_c <= 32'h670b0149;
            7'd32:  r_c <= 32'h66660145;
            7'd33:  r_c <= 32'h65c30141;
            7'd34:  r_c <= 32'h6522013d;
            7'd35:  r_c <= 32'h64830139;
            7'd36:  r_c <= 32'h63e70136;
            7'd37:  r_c <= 32'h634c0132;
            7'd38:  r_c <= 32'h62b2012e;
            7'd39:  r_c <= 32'h621b012a;
            7'd40:  r_c <= 32'h61860127;
            7'd41:  r_c <= 32'h60f20123;
            7'd42:  r_c <= 32'h60600120;
            7'd43:  r_c <= 32'h5fd0011d;
            7'd44:  r_c <= 32'h5f410119;
            7'd45:  r_c <= 32'h5eb40116;
            7'd46:  r_c <= 32'h5e290113;
            7'd47:  r_c <= 32'h5d9f0110;
            7'd48:  r_c <= 32'h5d17010d;
            7'd49:  r_c <= 32'h5c90010a;
            7'd50:  r_c <= 32'h5c0b0107;
            7'd51:  r_c <= 32'h5b870104;
            7'd52:  r_c <= 32'h5b050101;
            7'd53:  r_c <= 32'h5a8400fe;
            7'd54:  r_c <= 32'h5a0500fb;
            7'd55:  r_c <= 32'h598700f9;
            7'd56:  r_c <= 32'h590b00f6;
            7'd57:  r_c <= 32'h588f00f3;
            7'd58:  r_c <= 32'h581600f1;
            7'd59:  r_c <= 32'h579d00ee;
            7'd60:  r_c <= 32'h572600ec;
            7'd61:  r_c <= 32'h56b000e9;
            7'd62:  r_c <= 32'h563b00e7;
            7'd63:  r_c <= 32'h55c700e4;
            7'd64:  r_c <= 32'h555500e2;
            7'd65:  r_c <= 32'h54e400e0;
            7'd66:  r_c <= 32'h547400dd;
            7'd67:  r_c <= 32'h540500db;
            7'd68:  r_c <= 32'h539700d9;
            7'd69:  r_c <= 32'h532a00d7;
            7'd70:  r_c <= 32'h52bf00d4;
            7'd71:  r_c <= 32'h525400d2;
            7'd72:  r_c <= 32'h51eb00d0;
            7'd73:  r_c <= 32'h518300ce;
            7'd74:  r_c <= 32'h511b00cc;
            7'd75:  r_c <= 32'h50b500ca;
            7'd76:  r_c <= 32'h505000c8;
            7'd77:  r_c <= 32'h4fec00c6;
            7'd78:  r_c <= 32'h4f8800c4;
            7'd79:  r_c <= 32'h4f2600c2;
            7'd80:  r_c <= 32'h4ec400c0;
            7'd81:  r_c <= 32'h4e6400bf;
            7'd82:  r_c <= 32'h4e0400bd;
            7'd83:  r_c <= 32'h4da600bb;
            7'd84:  r_c <= 32'h4d4800b9;
            7'd85:  r_c <= 32'h4ceb00b8;
            7'd86:  r_c <= 32'h4c8f00b6;
            7'd87:  r_c <= 32'h4c3400b4;
            7'd88:  r_c <= 32'h4bda00b2;
            7'd89:  r_c <= 32'h4b8000b1;
            7'd90:  r_c <= 32'h4b2700af;
            7'd91:  r_c <= 32'h4ad000ae;
            7'd92:  r_c <= 32'h4a7900ac;
            7'd93:  r_c <= 32'h4a2200aa;
            7'd94:  r_c <= 32'h49cd00a9;
            7'd95:  r_c <= 32'h497800a7;
            7'd96:  r_c <= 32'h492400a6;
            7'd97:  r_c <= 32'h48d100a4;
            7'd98:  r_c <= 32'h487e00a3;
            7'd99:  r_c <= 32'h482d00a2;
            7'd100: r_c <= 32'h47dc00a0;
            7'd101: r_c <= 32'h478b009f;
            7'd102: r_c <= 32'h473c009d;
            7'd103: r_c <= 32'h46ed009c;
            7'd104: r_c <= 32'h469e009b;
            7'd105: r_c <= 32'h46510099;
            7'd106: r_c <= 32'h46040098;
            7'd107: r_c <= 32'h45b80097;
            7'd108: r_c <= 32'h456c0095;
            7'd109: r_c <= 32'h45210094;
            7'd110: r_c <= 32'h44d70093;
            7'd111: r_c <= 32'h448d0092;
            7'd112: r_c <= 32'h44440091;
            7'd113: r_c <= 32'h43fb008f;
            7'd114: r_c <= 32'h43b3008e;
            7'd115: r_c <= 32'h436c008d;
            7'd116: r_c <= 32'h4325008c;
            7'd117: r_c <= 32'h42df008b;
            7'd118: r_c <= 32'h429a008a;
            7'd119: r_c <= 32'h42540088;
            7'd120: r_c <= 32'h42100087;
            7'd121: r_c <= 32'h41cc0086;
            7'd122: r_c <= 32'h41890085;
            7'd123: r_c <= 32'h41460084;
            7'd124: r_c <= 32'h41040083;
            7'd125: r_c <= 32'h40c20082;
            7'd126: r_c <= 32'h40810081;
            7'd127: r_c <= 32'h40400080;
            default: r_c <= 32'h0;
        endcase
    end
 
 
endmodule

Line No.	Rev	Author	Line
1	2	specular	`//=======================================================================`
2			`// Project Monophony`
3			`// Wire-Frame 3D Graphics Accelerator IP Core`
4			`//`
5			`// File:`
6			`// fm_3d_core.v`
7			`//`
8			`// Abstract:`
9			`// 22-bit floating point 1/x rom table`
10			`//`
11			`// Author:`
12	4	specular	`// Kenji Ishimaru (info.wf3d@gmail.com)`
13	2	specular	`//`
14			`//======================================================================`
15			`//`
16			`// Copyright (c) 2015, Kenji Ishimaru`
17			`// All rights reserved.`
18			`//`
19			`// Redistribution and use in source and binary forms, with or without`
20			`// modification, are permitted provided that the following conditions are met:`
21			`//`
22			`// -Redistributions of source code must retain the above copyright notice,`
23			`// this list of conditions and the following disclaimer.`
24			`// -Redistributions in binary form must reproduce the above copyright notice,`
25			`// this list of conditions and the following disclaimer in the documentation`
26			`// and/or other materials provided with the distribution.`
27			`//`
28			`// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"`
29			`// AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,`
30			`// THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR`
31			`// PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR`
32			`// CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,`
33			`// EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,`
34			`// PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;`
35			`// OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,`
36			`// WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR`
37			`// OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,`
38			`// EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.`
39			`//`
40			`// Revision History`
41
42			`module fm_3d_frcp_rom (`
43			`clk_core,`
44			`i_a,`
45			`o_c`
46			`);`
47
48			`////////////////////////////`
49			`// I/O definition`
50			`////////////////////////////`
51			`input clk_core;`
52			`input [6:0] i_a;`
53			`output [31:0] o_c;`
54
55			`////////////////////////////`
56			`// reg`
57			`////////////////////////////`
58			`reg [31:0] r_c;`
59			`////////////////////////////`
60			`// assign`
61			`////////////////////////////`
62			`assign o_c = r_c;`
63			`///////////////////////////////////////////`
64			`// always statement`
65			`///////////////////////////////////////////`
66			`always @(posedge clk_core) begin`
67			`case (i_a)`
68			`7'd0: r_c <= 32'h800001fc;`
69			`7'd1: r_c <= 32'h7f0101f4;`
70			`7'd2: r_c <= 32'h7e0701ec;`
71			`7'd3: r_c <= 32'h7d1101e5;`
72			`7'd4: r_c <= 32'h7c1f01dd;`
73			`7'd5: r_c <= 32'h7b3001d6;`
74			`7'd6: r_c <= 32'h7a4401cf;`
75			`7'd7: r_c <= 32'h795c01c8;`
76			`7'd8: r_c <= 32'h787801c2;`
77			`7'd9: r_c <= 32'h779701bb;`
78			`7'd10: r_c <= 32'h76b901b5;`
79			`7'd11: r_c <= 32'h75de01af;`
80			`7'd12: r_c <= 32'h750701a8;`
81			`7'd13: r_c <= 32'h743201a2;`
82			`7'd14: r_c <= 32'h7361019d;`
83			`7'd15: r_c <= 32'h72920197;`
84			`7'd16: r_c <= 32'h71c70191;`
85			`7'd17: r_c <= 32'h70fe018c;`
86			`7'd18: r_c <= 32'h70380186;`
87			`7'd19: r_c <= 32'h6f740181;`
88			`7'd20: r_c <= 32'h6eb3017c;`
89			`7'd21: r_c <= 32'h6df50177;`
90			`7'd22: r_c <= 32'h6d3a0172;`
91			`7'd23: r_c <= 32'h6c80016d;`
92			`7'd24: r_c <= 32'h6bca0168;`
93			`7'd25: r_c <= 32'h6b150164;`
94			`7'd26: r_c <= 32'h6a63015f;`
95			`7'd27: r_c <= 32'h69b4015a;`
96			`7'd28: r_c <= 32'h69060156;`
97			`7'd29: r_c <= 32'h685b0152;`
98			`7'd30: r_c <= 32'h67b2014d;`
99			`7'd31: r_c <= 32'h670b0149;`
100			`7'd32: r_c <= 32'h66660145;`
101			`7'd33: r_c <= 32'h65c30141;`
102			`7'd34: r_c <= 32'h6522013d;`
103			`7'd35: r_c <= 32'h64830139;`
104			`7'd36: r_c <= 32'h63e70136;`
105			`7'd37: r_c <= 32'h634c0132;`
106			`7'd38: r_c <= 32'h62b2012e;`
107			`7'd39: r_c <= 32'h621b012a;`
108			`7'd40: r_c <= 32'h61860127;`
109			`7'd41: r_c <= 32'h60f20123;`
110			`7'd42: r_c <= 32'h60600120;`
111			`7'd43: r_c <= 32'h5fd0011d;`
112			`7'd44: r_c <= 32'h5f410119;`
113			`7'd45: r_c <= 32'h5eb40116;`
114			`7'd46: r_c <= 32'h5e290113;`
115			`7'd47: r_c <= 32'h5d9f0110;`
116			`7'd48: r_c <= 32'h5d17010d;`
117			`7'd49: r_c <= 32'h5c90010a;`
118			`7'd50: r_c <= 32'h5c0b0107;`
119			`7'd51: r_c <= 32'h5b870104;`
120			`7'd52: r_c <= 32'h5b050101;`
121			`7'd53: r_c <= 32'h5a8400fe;`
122			`7'd54: r_c <= 32'h5a0500fb;`
123			`7'd55: r_c <= 32'h598700f9;`
124			`7'd56: r_c <= 32'h590b00f6;`
125			`7'd57: r_c <= 32'h588f00f3;`
126			`7'd58: r_c <= 32'h581600f1;`
127			`7'd59: r_c <= 32'h579d00ee;`
128			`7'd60: r_c <= 32'h572600ec;`
129			`7'd61: r_c <= 32'h56b000e9;`
130			`7'd62: r_c <= 32'h563b00e7;`
131			`7'd63: r_c <= 32'h55c700e4;`
132			`7'd64: r_c <= 32'h555500e2;`
133			`7'd65: r_c <= 32'h54e400e0;`
134			`7'd66: r_c <= 32'h547400dd;`
135			`7'd67: r_c <= 32'h540500db;`
136			`7'd68: r_c <= 32'h539700d9;`
137			`7'd69: r_c <= 32'h532a00d7;`
138			`7'd70: r_c <= 32'h52bf00d4;`
139			`7'd71: r_c <= 32'h525400d2;`
140			`7'd72: r_c <= 32'h51eb00d0;`
141			`7'd73: r_c <= 32'h518300ce;`
142			`7'd74: r_c <= 32'h511b00cc;`
143			`7'd75: r_c <= 32'h50b500ca;`
144			`7'd76: r_c <= 32'h505000c8;`
145			`7'd77: r_c <= 32'h4fec00c6;`
146			`7'd78: r_c <= 32'h4f8800c4;`
147			`7'd79: r_c <= 32'h4f2600c2;`
148			`7'd80: r_c <= 32'h4ec400c0;`
149			`7'd81: r_c <= 32'h4e6400bf;`
150			`7'd82: r_c <= 32'h4e0400bd;`
151			`7'd83: r_c <= 32'h4da600bb;`
152			`7'd84: r_c <= 32'h4d4800b9;`
153			`7'd85: r_c <= 32'h4ceb00b8;`
154			`7'd86: r_c <= 32'h4c8f00b6;`
155			`7'd87: r_c <= 32'h4c3400b4;`
156			`7'd88: r_c <= 32'h4bda00b2;`
157			`7'd89: r_c <= 32'h4b8000b1;`
158			`7'd90: r_c <= 32'h4b2700af;`
159			`7'd91: r_c <= 32'h4ad000ae;`
160			`7'd92: r_c <= 32'h4a7900ac;`
161			`7'd93: r_c <= 32'h4a2200aa;`
162			`7'd94: r_c <= 32'h49cd00a9;`
163			`7'd95: r_c <= 32'h497800a7;`
164			`7'd96: r_c <= 32'h492400a6;`
165			`7'd97: r_c <= 32'h48d100a4;`
166			`7'd98: r_c <= 32'h487e00a3;`
167			`7'd99: r_c <= 32'h482d00a2;`
168			`7'd100: r_c <= 32'h47dc00a0;`
169			`7'd101: r_c <= 32'h478b009f;`
170			`7'd102: r_c <= 32'h473c009d;`
171			`7'd103: r_c <= 32'h46ed009c;`
172			`7'd104: r_c <= 32'h469e009b;`
173			`7'd105: r_c <= 32'h46510099;`
174			`7'd106: r_c <= 32'h46040098;`
175			`7'd107: r_c <= 32'h45b80097;`
176			`7'd108: r_c <= 32'h456c0095;`
177			`7'd109: r_c <= 32'h45210094;`
178			`7'd110: r_c <= 32'h44d70093;`
179			`7'd111: r_c <= 32'h448d0092;`
180			`7'd112: r_c <= 32'h44440091;`
181			`7'd113: r_c <= 32'h43fb008f;`
182			`7'd114: r_c <= 32'h43b3008e;`
183			`7'd115: r_c <= 32'h436c008d;`
184			`7'd116: r_c <= 32'h4325008c;`
185			`7'd117: r_c <= 32'h42df008b;`
186			`7'd118: r_c <= 32'h429a008a;`
187			`7'd119: r_c <= 32'h42540088;`
188			`7'd120: r_c <= 32'h42100087;`
189			`7'd121: r_c <= 32'h41cc0086;`
190			`7'd122: r_c <= 32'h41890085;`
191			`7'd123: r_c <= 32'h41460084;`
192			`7'd124: r_c <= 32'h41040083;`
193			`7'd125: r_c <= 32'h40c20082;`
194			`7'd126: r_c <= 32'h40810081;`
195			`7'd127: r_c <= 32'h40400080;`
196			`default: r_c <= 32'h0;`
197			`endcase`
198			`end`
199
200
201			`endmodule`

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