📄 crc16_dat32.v
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// Copyright 2007 Altera Corporation. All rights reserved.
// Altera products are protected under numerous U.S. and foreign patents,
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//
// This reference design file, and your use thereof, is subject to and governed
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/////////////////////////////////////////////////////////////////////////////
//// CRC-16 of 32 data bits. MSB used first.
// Polynomial 00001021 (MSB excluded)
// x^12 + x^5 + x^0
//
// Optimal LUT depth 2
//
// CCCCCCCCCCCCCCCC DDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDD
// 0000000000111111 00000000001111111111222222222233
// 0123456789012345 01234567890123456789012345678901
//
// C00 = ...XX.X...XXX... X...X...X..XX......XX.X...XXX...
// C01 = ....XX.X...XXX.. .X...X...X..XX......XX.X...XXX..
// C02 = .....XX.X...XXX. ..X...X...X..XX......XX.X...XXX.
// C03 = ......XX.X...XXX ...X...X...X..XX......XX.X...XXX
// C04 = X......XX.X...XX ....X...X...X..XX......XX.X...XX
// C05 = XX.XX.X.XXX.X..X X...XX..XX.XXX..XX.XX.X.XXX.X..X
// C06 = .XX.XX.X.XXX.X.. .X...XX..XX.XXX..XX.XX.X.XXX.X..
// C07 = ..XX.XX.X.XXX.X. ..X...XX..XX.XXX..XX.XX.X.XXX.X.
// C08 = X..XX.XX.X.XXX.X ...X...XX..XX.XXX..XX.XX.X.XXX.X
// C09 = XX..XX.XX.X.XXX. ....X...XX..XX.XXX..XX.XX.X.XXX.
// C10 = XXX..XX.XX.X.XXX .....X...XX..XX.XXX..XX.XX.X.XXX
// C11 = .XXX..XX.XX.X.XX ......X...XX..XX.XXX..XX.XX.X.XX
// C12 = X.X...XXX...XX.X X...X..XX......XX.X...XXX...XX.X
// C13 = XX.X...XXX...XX. .X...X..XX......XX.X...XXX...XX.
// C14 = .XX.X...XXX...XX ..X...X..XX......XX.X...XXX...XX
// C15 = ..XX.X...XXX...X ...X...X..XX......XX.X...XXX...X
//
module crc16_dat32 (crc_in,dat_in,crc_out);
input [15:0] crc_in;
input [31:0] dat_in;
output [15:0] crc_out;
wire [15:0] crc_out;
parameter METHOD = 1;
generate
if (METHOD == 0)
crc16_dat32_flat cc (.crc_in(crc_in),.dat_in(dat_in),.crc_out(crc_out));
else
crc16_dat32_factor cc (.crc_in(crc_in),.dat_in(dat_in),.crc_out(crc_out));
endgenerate
endmodule
////////////////////////////////////////////////////////////////
// Flat version
////////////////////////////////////////////////////////////////
module crc16_dat32_flat (crc_in,dat_in,crc_out);
input [15:0] crc_in;
input [31:0] dat_in;
output [15:0] crc_out;
wire [15:0] crc_out;
wire x15, x14, x13, x12, x11, x10, x9,
x8, x7, x6, x5, x4, x3, x2, x1,
x0;
assign crc_out = {x15,x14,x13,x12,x11,x10,x9,x8,x7,x6,x5,x4,x3,x2,x1,
x0};
wire d0,d1,d2,d3,d4,d5,d6,d7,d8,d9,d10,d11,d12,d13,d14,
d15,d16,d17,d18,d19,d20,d21,d22,d23,d24,d25,d26,d27,d28,d29,d30,
d31;
assign { d31,d30,d29,d28,d27,d26,d25,d24,d23,d22,d21,d20,d19,d18,d17,
d16,d15,d14,d13,d12,d11,d10,d9,d8,d7,d6,d5,d4,d3,d2,d1,
d0} = dat_in [31:0];
wire c0,c1,c2,c3,c4,c5,c6,c7,c8,c9,c10,c11,c12,c13,c14,
c15;
assign { c15,c14,c13,c12,c11,c10,c9,c8,c7,c6,c5,c4,c3,c2,c1,
c0} = crc_in [15:0];
assign x15 = d11 ^ d31 ^ c15 ^ d10 ^ d21 ^ c2 ^ c9 ^ d7 ^ d25 ^
c5 ^ d18 ^ d3 ^ c11 ^ d26 ^ c3 ^ c10 ^ d19 ^ d27; // 18 ins 1 outs
assign x14 = d10 ^ d30 ^ c14 ^ d9 ^ d20 ^ c1 ^ c8 ^ d6 ^ d24 ^
c15 ^ d31 ^ c4 ^ d17 ^ d2 ^ c10 ^ d25 ^ c2 ^ c9 ^ d18 ^
d26; // 20 ins 1 outs
assign x13 = d23 ^ d29 ^ c13 ^ d19 ^ c0 ^ c7 ^ d8 ^ d1 ^ d9 ^
d5 ^ c14 ^ d30 ^ c3 ^ d16 ^ c9 ^ d24 ^ c1 ^ c8 ^ d17 ^
d25; // 20 ins 1 outs
assign x12 = d0 ^ d28 ^ c12 ^ d18 ^ d7 ^ d8 ^ c6 ^ d22 ^ c13 ^
d29 ^ c2 ^ d15 ^ d4 ^ c8 ^ d23 ^ d31 ^ c15 ^ c0 ^ c7 ^
d24 ^ d16; // 21 ins 1 outs
assign x11 = c10 ^ d26 ^ d17 ^ d25 ^ d6 ^ c2 ^ c9 ^ d10 ^ c12 ^
d28 ^ c1 ^ d14 ^ d18 ^ c7 ^ c15 ^ d31 ^ d11 ^ d22 ^ c3 ^
d30 ^ c14 ^ d23 ^ c6 ^ d19 ^ d15; // 25 ins 1 outs
assign x10 = c9 ^ d25 ^ d24 ^ d5 ^ c1 ^ c8 ^ d9 ^ c11 ^ d31 ^
d16 ^ d27 ^ c0 ^ d13 ^ d17 ^ c15 ^ c6 ^ c14 ^ d30 ^ d10 ^
d21 ^ c2 ^ d29 ^ c13 ^ d22 ^ c5 ^ d18 ^ d14; // 27 ins 1 outs
assign x9 = c0 ^ c7 ^ d4 ^ c10 ^ d30 ^ d15 ^ d26 ^ d8 ^ d23 ^
d16 ^ d12 ^ c14 ^ c5 ^ c13 ^ d29 ^ d9 ^ d20 ^ c1 ^ d28 ^
c12 ^ d21 ^ d24 ^ c8 ^ c4 ^ d17 ^ d13; // 26 ins 1 outs
assign x8 = d15 ^ c7 ^ c15 ^ c6 ^ d3 ^ c9 ^ d29 ^ d14 ^ d25 ^
d7 ^ d22 ^ c13 ^ d11 ^ c12 ^ d28 ^ d19 ^ c0 ^ d27 ^ d8 ^
c4 ^ c11 ^ d20 ^ d23 ^ d31 ^ c3 ^ d12 ^ d16; // 27 ins 1 outs
assign x7 = d14 ^ c6 ^ c14 ^ c5 ^ d2 ^ c8 ^ d28 ^ d13 ^ d24 ^
d6 ^ d21 ^ c12 ^ d10 ^ c11 ^ d27 ^ d18 ^ d26 ^ d7 ^ c3 ^
c10 ^ d11 ^ d22 ^ d30 ^ c2 ^ d15 ^ d19; // 26 ins 1 outs
assign x6 = c5 ^ c13 ^ d12 ^ d9 ^ d1 ^ c7 ^ d27 ^ d13 ^ c11 ^
c4 ^ d23 ^ d5 ^ d20 ^ c10 ^ d26 ^ d17 ^ d25 ^ d6 ^ c2 ^
c9 ^ d10 ^ d21 ^ d29 ^ c1 ^ d14 ^ d18; // 26 ins 1 outs
assign x5 = c12 ^ d28 ^ c4 ^ d4 ^ d19 ^ c6 ^ d8 ^ d12 ^ c10 ^
c3 ^ d22 ^ d11 ^ d0 ^ c9 ^ d25 ^ d24 ^ d5 ^ c1 ^ c8 ^
d9 ^ d20 ^ d31 ^ d16 ^ d26 ^ c0 ^ d13 ^ d17 ^ c15; // 28 ins 1 outs
assign x4 = c8 ^ d24 ^ c15 ^ d31 ^ c0 ^ c7 ^ d4 ^ c10 ^ d30 ^
d15 ^ d26 ^ d8 ^ d23 ^ d16 ^ d12 ^ c14; // 16 ins 1 outs
assign x3 = d15 ^ c7 ^ c15 ^ d31 ^ d23 ^ c14 ^ d30 ^ c6 ^ d3 ^
c9 ^ d29 ^ d14 ^ d25 ^ d7 ^ d22 ^ c13 ^ d11; // 17 ins 1 outs
assign x2 = d14 ^ c6 ^ c14 ^ d30 ^ d22 ^ c13 ^ d29 ^ c5 ^ d2 ^
c8 ^ d28 ^ d13 ^ d24 ^ d6 ^ d21 ^ c12 ^ d10; // 17 ins 1 outs
assign x1 = c5 ^ c13 ^ d29 ^ d21 ^ c12 ^ d28 ^ d12 ^ d9 ^ d1 ^
c7 ^ d27 ^ d13 ^ c11 ^ c4 ^ d23 ^ d5 ^ d20; // 17 ins 1 outs
assign x0 = c12 ^ d28 ^ d20 ^ c11 ^ c4 ^ d26 ^ d27 ^ d4 ^ d19 ^
c6 ^ d8 ^ d12 ^ c10 ^ c3 ^ d22 ^ d11 ^ d0; // 17 ins 1 outs
endmodule
////////////////////////////////////////////////////////////////
// Depth optimal factored version
////////////////////////////////////////////////////////////////
module crc16_dat32_factor (crc_in,dat_in,crc_out);
input [15:0] crc_in;
input [31:0] dat_in;
output [15:0] crc_out;
wire [15:0] crc_out;
wire x281, x280, x279, x278, x277, x276, x275,
x274, x273, x272, x271, x270, x269, x268, x267,
x266, x265, x264, x263, x262, x261, x260, x259,
x258, x257, x256, x255, x254, x253, x252, x251,
x250, x249, x15, x14, x13, x12, x11, x10,
x9, x8, x7, x6, x5, x4, x3, x2,
x1, x0;
assign crc_out = {x15,x14,x13,x12,x11,x10,x9,x8,x7,x6,x5,x4,x3,x2,x1,
x0};
wire d0,d1,d2,d3,d4,d5,d6,d7,d8,d9,d10,d11,d12,d13,d14,
d15,d16,d17,d18,d19,d20,d21,d22,d23,d24,d25,d26,d27,d28,d29,d30,
d31;
assign { d31,d30,d29,d28,d27,d26,d25,d24,d23,d22,d21,d20,d19,d18,d17,
d16,d15,d14,d13,d12,d11,d10,d9,d8,d7,d6,d5,d4,d3,d2,d1,
d0} = dat_in [31:0];
wire c0,c1,c2,c3,c4,c5,c6,c7,c8,c9,c10,c11,c12,c13,c14,
c15;
assign { c15,c14,c13,c12,c11,c10,c9,c8,c7,c6,c5,c4,c3,c2,c1,
c0} = crc_in [15:0];
xor6 x281i (.out(x281),.a(d13),.b(d0),.c(d11),.d(c3),.e(1'b0),.f(1'b0)); // 4 ins 1 outs
xor6 x280i (.out(x280),.a(d1),.b(d23),.c(c7),.d(d12),.e(1'b0),.f(1'b0)); // 4 ins 1 outs
xor6 x279i (.out(x279),.a(d26),.b(d5),.c(c10),.d(d19),.e(1'b0),.f(1'b0)); // 4 ins 1 outs
xor6 x278i (.out(x278),.a(d1),.b(d21),.c(d6),.d(d15),.e(1'b0),.f(1'b0)); // 4 ins 1 outs
xor6 x277i (.out(x277),.a(d7),.b(d2),.c(d5),.d(1'b0),.e(1'b0),.f(1'b0)); // 3 ins 1 outs
xor6 x276i (.out(x276),.a(c11),.b(d14),.c(1'b0),.d(1'b0),.e(1'b0),.f(1'b0)); // 2 ins 1 outs
xor6 x275i (.out(x275),.a(c1),.b(d28),.c(c12),.d(1'b0),.e(1'b0),.f(1'b0)); // 3 ins 1 outs
xor6 x274i (.out(x274),.a(c6),.b(d22),.c(d8),.d(d18),.e(1'b0),.f(1'b0)); // 4 ins 1 outs
xor6 x273i (.out(x273),.a(d13),.b(d9),.c(d23),.d(c7),.e(1'b0),.f(1'b0)); // 4 ins 1 outs
xor6 x272i (.out(x272),.a(c15),.b(c5),.c(d21),.d(d31),.e(1'b0),.f(1'b0)); // 4 ins 1 outs
xor6 x271i (.out(x271),.a(d14),.b(c12),.c(d9),.d(d8),.e(d28),.f(1'b0)); // 5 ins 1 outs
xor6 x270i (.out(x270),.a(c2),.b(d7),.c(d18),.d(c3),.e(d11),.f(1'b0)); // 5 ins 1 outs
xor6 x269i (.out(x269),.a(d16),.b(c3),.c(d19),.d(d5),.e(c0),.f(1'b0)); // 5 ins 1 outs
xor6 x268i (.out(x268),.a(d2),.b(c5),.c(d14),.d(c2),.e(c3),.f(1'b0)); // 5 ins 1 outs
xor6 x267i (.out(x267),.a(c4),.b(d20),.c(d27),.d(d19),.e(d12),.f(1'b0)); // 5 ins 1 outs
xor6 x266i (.out(x266),.a(d31),.b(c15),.c(d6),.d(d21),.e(d2),.f(1'b0)); // 5 ins 1 outs
xor6 x265i (.out(x265),.a(d13),.b(d15),.c(d6),.d(d11),.e(d19),.f(1'b0)); // 5 ins 2 outs
xor6 x264i (.out(x264),.a(c5),.b(d9),.c(c0),.d(d16),.e(d17),.f(1'b0)); // 5 ins 1 outs
xor6 x263i (.out(x263),.a(d19),.b(d27),.c(c3),.d(c11),.e(1'b0),.f(1'b0)); // 4 ins 2 outs
xor6 x262i (.out(x262),.a(d24),.b(d4),.c(d11),.d(d0),.e(c8),.f(1'b0)); // 5 ins 2 outs
xor6 x261i (.out(x261),.a(d10),.b(d29),.c(c2),.d(d13),.e(c13),.f(1'b0)); // 5 ins 2 outs
xor6 x260i (.out(x260),.a(d21),.b(d15),.c(d1),.d(d8),.e(1'b0),.f(1'b0)); // 4 ins 3 outs
xor6 x259i (.out(x259),.a(d4),.b(c10),.c(d26),.d(d8),.e(1'b0),.f(1'b0)); // 4 ins 3 outs
xor6 x258i (.out(x258),.a(c14),.b(d30),.c(c15),.d(d14),.e(d31),.f(1'b0)); // 5 ins 2 outs
xor6 x257i (.out(x257),.a(d7),.b(d3),.c(c9),.d(d11),.e(d25),.f(1'b0)); // 5 ins 3 outs
xor6 x256i (.out(x256),.a(c11),.b(d5),.c(c5),.d(d27),.e(d14),.f(1'b0)); // 5 ins 4 outs
xor6 x255i (.out(x255),.a(d12),.b(d13),.c(c4),.d(d20),.e(1'b0),.f(1'b0)); // 4 ins 5 outs
xor6 x254i (.out(x254),.a(c15),.b(d8),.c(d16),.d(c0),.e(d31),.f(1'b0)); // 5 ins 5 outs
xor6 x253i (.out(x253),.a(c10),.b(d10),.c(d26),.d(d18),.e(c2),.f(1'b0)); // 5 ins 5 outs
xor6 x252i (.out(x252),.a(d29),.b(c13),.c(c7),.d(d23),.e(d15),.f(1'b0)); // 5 ins 7 outs
xor6 x251i (.out(x251),.a(d17),.b(c1),.c(d9),.d(d25),.e(c9),.f(1'b0)); // 5 ins 6 outs
xor6 x250i (.out(x250),.a(d24),.b(c8),.c(c14),.d(d30),.e(d21),.f(1'b0)); // 5 ins 7 outs
xor6 x249i (.out(x249),.a(c12),.b(d28),.c(c6),.d(c3),.e(d22),.f(1'b0)); // 5 ins 7 outs
xor6 x15i (.out(x15),.a(x272),.b(x263),.c(x257),.d(x253),.e(1'b0),.f(1'b0)); // 4 ins 1 outs
xor6 x14i (.out(x14),.a(c4),.b(x250),.c(d20),.d(x266),.e(x253),.f(x251)); // 6 ins 1 outs
xor6 x13i (.out(x13),.a(x269),.b(x250),.c(x260),.d(x252),.e(x251),.f(1'b0)); // 5 ins 1 outs
xor6 x12i (.out(x12),.a(x270),.b(x249),.c(x262),.d(x252),.e(x254),.f(1'b0)); // 5 ins 1 outs
xor6 x11i (.out(x11),.a(x273),.b(x251),.c(x265),.d(x253),.e(x258),.f(x249)); // 6 ins 1 outs
xor6 x10i (.out(x10),.a(x274),.b(x254),.c(x251),.d(x256),.e(x261),.f(x250)); // 6 ins 1 outs
xor6 x9i (.out(x9),.a(x264),.b(x255),.c(x250),.d(x275),.e(x259),.f(x252)); // 6 ins 1 outs
xor6 x8i (.out(x8),.a(x267),.b(x276),.c(x249),.d(x252),.e(x254),.f(x257)); // 6 ins 1 outs
xor6 x7i (.out(x7),.a(x277),.b(x256),.c(x253),.d(x265),.e(x250),.f(x249)); // 6 ins 1 outs
xor6 x6i (.out(x6),.a(x278),.b(x252),.c(x255),.d(x256),.e(x253),.f(x251)); // 6 ins 1 outs
xor6 x5i (.out(x5),.a(x279),.b(x251),.c(x255),.d(x254),.e(x262),.f(x249)); // 6 ins 1 outs
xor6 x4i (.out(x4),.a(x280),.b(x260),.c(x259),.d(x254),.e(x250),.f(1'b0)); // 5 ins 1 outs
xor6 x3i (.out(x3),.a(x258),.b(c6),.c(d22),.d(x257),.e(x252),.f(1'b0)); // 5 ins 1 outs
xor6 x2i (.out(x2),.a(x268),.b(d6),.c(x249),.d(x261),.e(x250),.f(1'b0)); // 5 ins 1 outs
xor6 x1i (.out(x1),.a(x271),.b(x256),.c(x260),.d(x255),.e(x252),.f(1'b0)); // 5 ins 1 outs
xor6 x0i (.out(x0),.a(x281),.b(x255),.c(x263),.d(x249),.e(x259),.f(1'b0)); // 5 ins 1 outs
endmodule
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