crc32_dat16.v

本電子檔為 verilog cookbook,包含了通訊,影像,DSP等重要常用之verilog編碼,可作為工程師與初學者的參考手冊

    assign x22 = c25 ^ c16 ^ c27 ^ d11 ^ d0 ^ d12 ^ c30 ^ d14 ^ c28 ^ 
        d9 ^ c6;  // 11 ins 1 outs

    assign x21 = d5 ^ c25 ^ c21 ^ d9 ^ c26 ^ d10 ^ c29 ^ d13 ^ c5;  // 9 ins 1 outs

    assign x20 = d4 ^ c24 ^ c20 ^ d9 ^ c28 ^ d12 ^ c25 ^ d8 ^ c4;  // 9 ins 1 outs

    assign x19 = c31 ^ d3 ^ c23 ^ c19 ^ c27 ^ d11 ^ c24 ^ d7 ^ d15 ^ 
        d8 ^ c3;  // 11 ins 1 outs

    assign x18 = c30 ^ d2 ^ c22 ^ d15 ^ c31 ^ c18 ^ c26 ^ d10 ^ c23 ^ 
        d6 ^ d14 ^ d7 ^ c2;  // 13 ins 1 outs

    assign x17 = c29 ^ d14 ^ c30 ^ c17 ^ d5 ^ c22 ^ d9 ^ c21 ^ d1 ^ 
        d13 ^ d6 ^ c25 ^ c1;  // 13 ins 1 outs

    assign x16 = c28 ^ d13 ^ c29 ^ c16 ^ d5 ^ d0 ^ c20 ^ d12 ^ c21 ^ 
        d4 ^ c24 ^ d8 ^ c0;  // 13 ins 1 outs

endmodule

////////////////////////////////////////////////////////////////
// Depth optimal factored version
////////////////////////////////////////////////////////////////

module crc32_dat16_factor (crc_in,dat_in,crc_out);
input [31:0] crc_in;
input [15:0] dat_in;
output [31:0] crc_out;

wire [31:0] crc_out;

wire x64, x63, x62, x61, x60, x59, x58, 
       x57, x55, x54, x53, x52, x51, x50, x49, 
       x48, x47, x46, x45, x44, x43, x42, x41, 
       x40, x39, x38, x37, x36, x35, x34, x33, 
       x32, x15, x14, x13, x12, x11, x10, x9, 
       x8, x7, x6, x5, x4, x3, x2, x1, 
       x0, x31, x30, x29, x28, x27, x26, x25, 
       x24, x23, x22, x21, x20, x19, x18, x17, 
       x16;

assign crc_out = {x31,x30,x29,x28,x27,x26,x25,x24,x23,x22,x21,x20,x19,x18,x17,
        x16,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;

assign { d15,d14,d13,d12,d11,d10,d9,d8,d7,d6,d5,d4,d3,d2,d1,
        d0} = dat_in [15:0];

wire c0,c1,c2,c3,c4,c5,c6,c7,c8,c9,c10,c11,c12,c13,c14,
    c15,c16,c17,c18,c19,c20,c21,c22,c23,c24,c25,c26,c27,c28,c29,c30,
    c31;

assign { c31,c30,c29,c28,c27,c26,c25,c24,c23,c22,c21,c20,c19,c18,c17,
        c16,c15,c14,c13,c12,c11,c10,c9,c8,c7,c6,c5,c4,c3,c2,c1,
        c0} = crc_in [31:0];

    xor6 x64i (.out(x64),.a(d6),.b(c22),.c(d11),.d(c27),.e(1'b0),.f(1'b0));  // 4 ins 1 outs

    xor6 x63i (.out(x63),.a(d7),.b(c23),.c(c18),.d(d2),.e(1'b0),.f(1'b0));  // 4 ins 1 outs

    xor6 x62i (.out(x62),.a(c26),.b(c17),.c(c27),.d(d11),.e(1'b0),.f(1'b0));  // 4 ins 1 outs

    xor6 x61i (.out(x61),.a(c17),.b(c18),.c(d2),.d(d1),.e(1'b0),.f(1'b0));  // 4 ins 1 outs

    xor6 x60i (.out(x60),.a(c16),.b(d5),.c(d0),.d(c21),.e(1'b0),.f(1'b0));  // 4 ins 1 outs

    xor6 x59i (.out(x59),.a(d9),.b(c25),.c(c21),.d(d5),.e(1'b0),.f(1'b0));  // 4 ins 1 outs

    xor6 x58i (.out(x58),.a(c22),.b(d6),.c(c17),.d(d1),.e(1'b0),.f(1'b0));  // 4 ins 1 outs

    xor6 x57i (.out(x57),.a(c2),.b(c31),.c(d7),.d(c23),.e(1'b0),.f(1'b0));  // 4 ins 1 outs

    xor6 x55i (.out(x55),.a(c22),.b(c7),.c(c16),.d(d6),.e(1'b0),.f(1'b0));  // 4 ins 1 outs

    xor6 x54i (.out(x54),.a(d6),.b(d9),.c(d10),.d(c22),.e(1'b0),.f(1'b0));  // 4 ins 1 outs

    xor6 x53i (.out(x53),.a(c16),.b(c24),.c(d0),.d(d8),.e(1'b0),.f(1'b0));  // 4 ins 2 outs

    xor6 x52i (.out(x52),.a(c30),.b(c27),.c(d11),.d(d14),.e(d4),.f(1'b0));  // 5 ins 1 outs

    xor6 x51i (.out(x51),.a(c25),.b(d14),.c(c30),.d(d9),.e(1'b0),.f(1'b0));  // 4 ins 2 outs

    xor6 x50i (.out(x50),.a(c18),.b(d2),.c(d3),.d(c19),.e(1'b0),.f(1'b0));  // 4 ins 2 outs

    xor6 x49i (.out(x49),.a(d4),.b(c20),.c(c22),.d(d6),.e(1'b0),.f(1'b0));  // 4 ins 2 outs

    xor6 x48i (.out(x48),.a(d5),.b(c12),.c(d8),.d(c24),.e(1'b0),.f(1'b0));  // 4 ins 1 outs

    xor6 x47i (.out(x47),.a(d4),.b(d8),.c(c20),.d(c24),.e(1'b0),.f(1'b0));  // 4 ins 2 outs

    xor6 x46i (.out(x46),.a(d1),.b(d8),.c(d10),.d(c24),.e(1'b0),.f(1'b0));  // 4 ins 1 outs

    xor6 x45i (.out(x45),.a(d3),.b(c29),.c(d5),.d(c21),.e(d13),.f(1'b0));  // 5 ins 2 outs

    xor6 x44i (.out(x44),.a(c30),.b(d14),.c(d5),.d(c21),.e(1'b0),.f(1'b0));  // 4 ins 2 outs

    xor6 x43i (.out(x43),.a(d1),.b(c17),.c(d15),.d(c31),.e(1'b0),.f(1'b0));  // 4 ins 3 outs

    xor6 x42i (.out(x42),.a(c29),.b(d10),.c(d5),.d(c21),.e(c26),.f(1'b0));  // 5 ins 3 outs

    xor6 x41i (.out(x41),.a(c27),.b(d11),.c(d5),.d(c21),.e(1'b0),.f(1'b0));  // 4 ins 4 outs

    xor6 x40i (.out(x40),.a(c19),.b(c23),.c(d7),.d(d3),.e(1'b0),.f(1'b0));  // 4 ins 4 outs

    xor6 x39i (.out(x39),.a(d12),.b(c28),.c(d0),.d(c16),.e(1'b0),.f(1'b0));  // 4 ins 3 outs

    xor6 x38i (.out(x38),.a(d10),.b(c26),.c(c30),.d(d14),.e(1'b0),.f(1'b0));  // 4 ins 5 outs

    xor6 x37i (.out(x37),.a(c19),.b(d0),.c(d3),.d(c16),.e(1'b0),.f(1'b0));  // 4 ins 7 outs

    xor6 x36i (.out(x36),.a(c24),.b(c31),.c(d15),.d(d8),.e(1'b0),.f(1'b0));  // 4 ins 8 outs

    xor6 x35i (.out(x35),.a(c20),.b(d4),.c(d12),.d(c28),.e(1'b0),.f(1'b0));  // 4 ins 8 outs

    xor6 x34i (.out(x34),.a(d7),.b(c23),.c(d1),.d(c17),.e(1'b0),.f(1'b0));  // 4 ins 8 outs

    xor6 x33i (.out(x33),.a(c22),.b(c18),.c(d2),.d(d6),.e(1'b0),.f(1'b0));  // 4 ins 8 outs

    xor6 x32i (.out(x32),.a(c29),.b(d9),.c(c25),.d(d13),.e(1'b0),.f(1'b0));  // 4 ins 9 outs

    xor6 x15i (.out(x15),.a(x59),.b(x35),.c(x36),.d(x40),.e(1'b0),.f(1'b0));  // 4 ins 1 outs

    xor6 x14i (.out(x14),.a(x52),.b(c20),.c(x33),.d(x36),.e(x40),.f(1'b0));  // 5 ins 1 outs

    xor6 x13i (.out(x13),.a(c19),.b(x33),.c(x34),.d(x45),.e(x38),.f(1'b0));  // 5 ins 1 outs

    xor6 x12i (.out(x12),.a(x60),.b(x33),.c(x35),.d(x43),.e(x32),.f(1'b0));  // 5 ins 1 outs

    xor6 x11i (.out(x11),.a(x51),.b(x35),.c(x37),.d(x43),.e(1'b0),.f(1'b0));  // 4 ins 1 outs

    xor6 x10i (.out(x10),.a(c18),.b(x44),.c(d2),.d(x37),.e(x32),.f(1'b0));  // 5 ins 1 outs

    xor6 x9i (.out(x9),.a(x61),.b(x41),.c(x35),.d(x32),.e(1'b0),.f(1'b0));  // 4 ins 1 outs

    xor6 x8i (.out(x8),.a(x46),.b(x35),.c(x37),.d(x62),.e(1'b0),.f(1'b0));  // 4 ins 1 outs

    xor6 x7i (.out(x7),.a(c29),.b(x63),.c(x37),.d(x42),.e(x36),.f(1'b0));  // 5 ins 1 outs

    xor6 x6i (.out(x6),.a(x33),.b(x34),.c(c30),.d(d14),.e(x47),.f(x41));  // 6 ins 1 outs

    xor6 x5i (.out(x5),.a(x49),.b(d13),.c(x37),.d(x34),.e(x42),.f(1'b0));  // 5 ins 1 outs

    xor6 x4i (.out(x4),.a(x33),.b(x35),.c(x36),.d(d11),.e(x37),.f(c27));  // 6 ins 1 outs

    xor6 x3i (.out(x3),.a(d9),.b(x36),.c(c25),.d(x50),.e(x38),.f(x34));  // 6 ins 1 outs

    xor6 x2i (.out(x2),.a(x33),.b(x32),.c(x34),.d(x53),.e(c30),.f(d14));  // 6 ins 1 outs

    xor6 x1i (.out(x1),.a(x64),.b(x34),.c(x39),.d(x32),.e(1'b0),.f(1'b0));  // 4 ins 1 outs

    xor6 x0i (.out(x0),.a(x54),.b(c25),.c(c26),.d(x39),.e(1'b0),.f(1'b0));  // 4 ins 1 outs

    xor6 x31i (.out(x31),.a(x36),.b(x41),.c(d9),.d(c25),.e(c15),.f(1'b0));  // 5 ins 1 outs

    xor6 x30i (.out(x30),.a(d7),.b(c23),.c(x47),.d(x38),.e(c14),.f(1'b0));  // 5 ins 1 outs

    xor6 x29i (.out(x29),.a(d6),.b(x32),.c(x40),.d(c22),.e(c13),.f(1'b0));  // 5 ins 1 outs

    xor6 x28i (.out(x28),.a(c21),.b(d12),.c(c28),.d(x48),.e(x33),.f(1'b0));  // 5 ins 1 outs

    xor6 x27i (.out(x27),.a(x34),.b(d4),.c(x41),.d(c20),.e(c11),.f(1'b0));  // 5 ins 1 outs

    xor6 x26i (.out(x26),.a(d10),.b(c26),.c(x49),.d(x37),.e(c10),.f(1'b0));  // 5 ins 1 outs

    xor6 x25i (.out(x25),.a(d11),.b(c27),.c(x36),.d(x50),.e(c9),.f(1'b0));  // 5 ins 1 outs

    xor6 x24i (.out(x24),.a(c18),.b(d2),.c(x34),.d(x38),.e(c8),.f(1'b0));  // 5 ins 1 outs

    xor6 x23i (.out(x23),.a(d0),.b(x55),.c(x32),.d(x43),.e(1'b0),.f(1'b0));  // 4 ins 1 outs

    xor6 x22i (.out(x22),.a(d11),.b(c27),.c(x51),.d(x39),.e(c6),.f(1'b0));  // 5 ins 1 outs

    xor6 x21i (.out(x21),.a(c29),.b(x32),.c(x42),.d(c5),.e(1'b0),.f(1'b0));  // 4 ins 1 outs

    xor6 x20i (.out(x20),.a(c24),.b(c25),.c(d9),.d(d8),.e(x35),.f(c4));  // 6 ins 1 outs

    xor6 x19i (.out(x19),.a(d11),.b(c27),.c(x40),.d(x36),.e(c3),.f(1'b0));  // 5 ins 1 outs

    xor6 x18i (.out(x18),.a(x57),.b(d15),.c(x33),.d(x38),.e(1'b0),.f(1'b0));  // 4 ins 1 outs

    xor6 x17i (.out(x17),.a(x58),.b(x32),.c(x44),.d(c1),.e(1'b0),.f(1'b0));  // 4 ins 1 outs

    xor6 x16i (.out(x16),.a(x35),.b(d3),.c(x53),.d(x45),.e(c0),.f(1'b0));  // 5 ins 1 outs

endmodule