crc32_dat24.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 x25 = c10 ^ d18 ^ c16 ^ d19 ^ c29 ^ d22 ^ c30 ^ d11 ^ d3 ^ 
        c19 ^ d8 ^ d17 ^ c23 ^ d15 ^ c11 ^ d2 ^ d21 ^ c26 ^ c25 ^ 
        c27 ^ c1;  // 21 ins 1 outs

    assign x24 = d1 ^ c15 ^ d7 ^ c25 ^ c28 ^ d21 ^ c29 ^ d14 ^ d2 ^ 
        d17 ^ c9 ^ c22 ^ c26 ^ d20 ^ c18 ^ d10 ^ c24 ^ d18 ^ c10 ^ 
        d16 ^ c0;  // 21 ins 1 outs

endmodule

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

module crc32_dat24_factor (crc_in,dat_in,crc_out);
input [31:0] crc_in;
input [23:0] dat_in;
output [31:0] crc_out;

wire [31:0] crc_out;

wire x142, x141, x140, x139, x138, x137, x136, 
       x135, x134, x133, x132, x131, x130, x129, x128, 
       x127, x126, x125, x124, x123, x122, x121, x120, 
       x119, x118, x117, x116, x115, x114, x113, x112, 
       x111, x110, x109, x108, x107, x106, x105, x104, 
       x103, x102, x101, x100, x99, x98, x97, x96, 
       x95, x94, x93, x92, x91, x90, x89, x23, 
       x22, x21, x20, x19, x18, x17, x16, x15, 
       x14, x13, x12, x11, x10, x9, x8, x7, 
       x6, x5, x4, x3, x2, x1, x0, x31, 
       x30, x29, x28, x27, x26, x25, x24;

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,d16,d17,d18,d19,d20,d21,d22,d23;

assign { 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 [23:0];

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 x142i (.out(x142),.a(c0),.b(d18),.c(d21),.d(c29),.e(1'b0),.f(1'b0));  // 4 ins 1 outs

    xor6 x141i (.out(x141),.a(c1),.b(c10),.c(d21),.d(c29),.e(1'b0),.f(1'b0));  // 4 ins 1 outs

    xor6 x140i (.out(x140),.a(c15),.b(d2),.c(d7),.d(d11),.e(1'b0),.f(1'b0));  // 4 ins 1 outs

    xor6 x139i (.out(x139),.a(d0),.b(c14),.c(d2),.d(d11),.e(1'b0),.f(1'b0));  // 4 ins 1 outs

    xor6 x138i (.out(x138),.a(c15),.b(d19),.c(c27),.d(1'b0),.e(1'b0),.f(1'b0));  // 3 ins 1 outs

    xor6 x137i (.out(x137),.a(c9),.b(d6),.c(d11),.d(c19),.e(1'b0),.f(1'b0));  // 4 ins 1 outs

    xor6 x136i (.out(x136),.a(c9),.b(c10),.c(d0),.d(c8),.e(1'b0),.f(1'b0));  // 4 ins 1 outs

    xor6 x135i (.out(x135),.a(d13),.b(d1),.c(d2),.d(1'b0),.e(1'b0),.f(1'b0));  // 3 ins 1 outs

    xor6 x134i (.out(x134),.a(d2),.b(c30),.c(1'b0),.d(1'b0),.e(1'b0),.f(1'b0));  // 2 ins 1 outs

    xor6 x133i (.out(x133),.a(d2),.b(d18),.c(c26),.d(1'b0),.e(1'b0),.f(1'b0));  // 3 ins 1 outs

    xor6 x132i (.out(x132),.a(c14),.b(c13),.c(d1),.d(d0),.e(1'b0),.f(1'b0));  // 4 ins 1 outs

    xor6 x131i (.out(x131),.a(c9),.b(d1),.c(d14),.d(c22),.e(1'b0),.f(1'b0));  // 4 ins 1 outs

    xor6 x130i (.out(x130),.a(c19),.b(c22),.c(d14),.d(c11),.e(1'b0),.f(1'b0));  // 4 ins 1 outs

    xor6 x129i (.out(x129),.a(d20),.b(d0),.c(c28),.d(1'b0),.e(1'b0),.f(1'b0));  // 3 ins 1 outs

    xor6 x128i (.out(x128),.a(d0),.b(d3),.c(c2),.d(d1),.e(c8),.f(1'b0));  // 5 ins 1 outs

    xor6 x127i (.out(x127),.a(c3),.b(d2),.c(c27),.d(d19),.e(c11),.f(1'b0));  // 5 ins 1 outs

    xor6 x126i (.out(x126),.a(d0),.b(d18),.c(d8),.d(c16),.e(c26),.f(1'b0));  // 5 ins 1 outs

    xor6 x125i (.out(x125),.a(d10),.b(c18),.c(c9),.d(c17),.e(d9),.f(1'b0));  // 5 ins 1 outs

    xor6 x124i (.out(x124),.a(d10),.b(c14),.c(c22),.d(c18),.e(c9),.f(1'b0));  // 5 ins 1 outs

    xor6 x123i (.out(x123),.a(c8),.b(d15),.c(c26),.d(d14),.e(c23),.f(1'b0));  // 5 ins 1 outs

    xor6 x122i (.out(x122),.a(d19),.b(d6),.c(c11),.d(c14),.e(c27),.f(1'b0));  // 5 ins 1 outs

    xor6 x121i (.out(x121),.a(d3),.b(c17),.c(d9),.d(c5),.e(d21),.f(1'b0));  // 5 ins 1 outs

    xor6 x120i (.out(x120),.a(c23),.b(c10),.c(d9),.d(d18),.e(d0),.f(1'b0));  // 5 ins 1 outs

    xor6 x119i (.out(x119),.a(d3),.b(d1),.c(c13),.d(d22),.e(d5),.f(1'b0));  // 5 ins 1 outs

    xor6 x118i (.out(x118),.a(c28),.b(c9),.c(c26),.d(d20),.e(1'b0),.f(1'b0));  // 4 ins 3 outs

    xor6 x117i (.out(x117),.a(d4),.b(c10),.c(c16),.d(c6),.e(d10),.f(1'b0));  // 5 ins 1 outs

    xor6 x116i (.out(x116),.a(c19),.b(d0),.c(d12),.d(c20),.e(1'b0),.f(1'b0));  // 4 ins 3 outs

    xor6 x115i (.out(x115),.a(c8),.b(c18),.c(d10),.d(c22),.e(d7),.f(1'b0));  // 5 ins 1 outs

    xor6 x114i (.out(x114),.a(c9),.b(c21),.c(c10),.d(c8),.e(c26),.f(1'b0));  // 5 ins 1 outs

    xor6 x113i (.out(x113),.a(d13),.b(c27),.c(c13),.d(d19),.e(c21),.f(1'b0));  // 5 ins 2 outs

    xor6 x112i (.out(x112),.a(c25),.b(d23),.c(c29),.d(c31),.e(d21),.f(1'b0));  // 5 ins 2 outs

    xor6 x111i (.out(x111),.a(c19),.b(d22),.c(d1),.d(d11),.e(c30),.f(1'b0));  // 5 ins 2 outs

    xor6 x110i (.out(x110),.a(d20),.b(c28),.c(d6),.d(c10),.e(c19),.f(1'b0));  // 5 ins 2 outs

    xor6 x109i (.out(x109),.a(d2),.b(c23),.c(d15),.d(c27),.e(d19),.f(1'b0));  // 5 ins 2 outs

    xor6 x108i (.out(x108),.a(c18),.b(c21),.c(c25),.d(c30),.e(d17),.f(1'b0));  // 5 ins 1 outs

    xor6 x107i (.out(x107),.a(d7),.b(c9),.c(c11),.d(c15),.e(1'b0),.f(1'b0));  // 4 ins 3 outs

    xor6 x106i (.out(x106),.a(d17),.b(c25),.c(c26),.d(c17),.e(d1),.f(1'b0));  // 5 ins 1 outs

    xor6 x105i (.out(x105),.a(c15),.b(d7),.c(d20),.d(c11),.e(c28),.f(1'b0));  // 5 ins 2 outs

    xor6 x104i (.out(x104),.a(c18),.b(d16),.c(c24),.d(d10),.e(1'b0),.f(1'b0));  // 4 ins 3 outs

    xor6 x103i (.out(x103),.a(c14),.b(d8),.c(c30),.d(d22),.e(c16),.f(1'b0));  // 5 ins 4 outs

    xor6 x102i (.out(x102),.a(d2),.b(c22),.c(d0),.d(d3),.e(c11),.f(1'b0));  // 5 ins 4 outs

    xor6 x101i (.out(x101),.a(d10),.b(c18),.c(d6),.d(c14),.e(1'b0),.f(1'b0));  // 4 ins 3 outs

    xor6 x100i (.out(x100),.a(d18),.b(c13),.c(c17),.d(d9),.e(d5),.f(1'b0));  // 5 ins 4 outs

    xor6 x99i (.out(x99),.a(c30),.b(d22),.c(d23),.d(c31),.e(1'b0),.f(1'b0));  // 4 ins 5 outs

    xor6 x98i (.out(x98),.a(d2),.b(d1),.c(c25),.d(d17),.e(1'b0),.f(1'b0));  // 4 ins 10 outs

    xor6 x97i (.out(x97),.a(d20),.b(d4),.c(d1),.d(c28),.e(c12),.f(1'b0));  // 5 ins 5 outs

    xor6 x96i (.out(x96),.a(d11),.b(d23),.c(c19),.d(c31),.e(1'b0),.f(1'b0));  // 4 ins 6 outs

    xor6 x95i (.out(x95),.a(c13),.b(d2),.c(c29),.d(d21),.e(d5),.f(1'b0));  // 5 ins 8 outs

    xor6 x94i (.out(x94),.a(d18),.b(c11),.c(d19),.d(c27),.e(c26),.f(1'b0));  // 5 ins 6 outs

    xor6 x93i (.out(x93),.a(c20),.b(d12),.c(c8),.d(d4),.e(c12),.f(1'b0));  // 5 ins 8 outs

    xor6 x92i (.out(x92),.a(d16),.b(c17),.c(c24),.d(d9),.e(c8),.f(1'b0));  // 5 ins 9 outs

    xor6 x91i (.out(x91),.a(d7),.b(d14),.c(c22),.d(c15),.e(c10),.f(1'b0));  // 5 ins 8 outs

    xor6 x90i (.out(x90),.a(c9),.b(d6),.c(c21),.d(d13),.e(c14),.f(1'b0));  // 5 ins 8 outs

    xor6 x89i (.out(x89),.a(d3),.b(c23),.c(d8),.d(c16),.e(d15),.f(1'b0));  // 5 ins 8 outs

    xor6 x23i (.out(x23),.a(x129),.b(x98),.c(x92),.d(x109),.e(x90),.f(1'b0));  // 5 ins 1 outs

    xor6 x22i (.out(x22),.a(x130),.b(x96),.c(x116),.d(x94),.e(x92),.f(1'b0));  // 5 ins 1 outs

    xor6 x21i (.out(x21),.a(x108),.b(d10),.c(c26),.d(d22),.e(d13),.f(x100));  // 6 ins 1 outs

    xor6 x20i (.out(x20),.a(d8),.b(x92),.c(c16),.d(x93),.e(d17),.f(x112));  // 6 ins 1 outs

    xor6 x19i (.out(x19),.a(d1),.b(x111),.c(x105),.d(d16),.e(c24),.f(x89));  // 6 ins 1 outs

    xor6 x18i (.out(x18),.a(x112),.b(c25),.c(x101),.d(x109),.e(x91),.f(1'b0));  // 5 ins 1 outs

    xor6 x17i (.out(x17),.a(x131),.b(x118),.c(x90),.d(x99),.e(x100),.f(1'b0));  // 5 ins 1 outs

    xor6 x16i (.out(x16),.a(x132),.b(x98),.c(x95),.d(x103),.e(x113),.f(x93));  // 6 ins 1 outs

    xor6 x15i (.out(x15),.a(x133),.b(x95),.c(x92),.d(x93),.e(x105),.f(x89));  // 6 ins 1 outs

    xor6 x14i (.out(x14),.a(x122),.b(x96),.c(x98),.d(x97),.e(x91),.f(x89));  // 6 ins 1 outs

    xor6 x13i (.out(x13),.a(x119),.b(x134),.c(x90),.d(x91),.e(x104),.f(x94));  // 6 ins 1 outs

    xor6 x12i (.out(x12),.a(d15),.b(x106),.c(x93),.d(x95),.e(x120),.f(x90));  // 6 ins 1 outs

    xor6 x11i (.out(x11),.a(x92),.b(x93),.c(x123),.d(x118),.e(x98),.f(x102));  // 6 ins 1 outs

    xor6 x10i (.out(x10),.a(d5),.b(d14),.c(c10),.d(x113),.e(x102),.f(x92));  // 6 ins 1 outs

    xor6 x9i (.out(x9),.a(x114),.b(x93),.c(x96),.d(x135),.e(x100),.f(1'b0));  // 5 ins 1 outs

    xor6 x8i (.out(x8),.a(x124),.b(x102),.c(x96),.d(x103),.e(x98),.f(x93));  // 6 ins 1 outs

    xor6 x7i (.out(x7),.a(x136),.b(x107),.c(x104),.d(x99),.e(x95),.f(x89));  // 6 ins 1 outs

    xor6 x6i (.out(x6),.a(x137),.b(x95),.c(x97),.d(x103),.e(x91),.f(1'b0));  // 5 ins 1 outs

    xor6 x5i (.out(x5),.a(x115),.b(x102),.c(x138),.d(x90),.e(x95),.f(x97));  // 6 ins 1 outs

    xor6 x4i (.out(x4),.a(x139),.b(x94),.c(x110),.d(x93),.e(x89),.f(1'b0));  // 5 ins 1 outs

    xor6 x3i (.out(x3),.a(x125),.b(x91),.c(x98),.d(x94),.e(x89),.f(1'b0));  // 5 ins 1 outs

    xor6 x2i (.out(x2),.a(x126),.b(x90),.c(x91),.d(x98),.e(x92),.f(1'b0));  // 5 ins 1 outs

    xor6 x1i (.out(x1),.a(x140),.b(x98),.c(x116),.d(x92),.e(x90),.f(1'b0));  // 5 ins 1 outs

    xor6 x0i (.out(x0),.a(c20),.b(x101),.c(d12),.d(d0),.e(x92),.f(1'b0));  // 5 ins 1 outs

    xor6 x31i (.out(x31),.a(x100),.b(c7),.c(d3),.d(d18),.e(x96),.f(x89));  // 6 ins 1 outs

    xor6 x30i (.out(x30),.a(c12),.b(x91),.c(d8),.d(x117),.e(c18),.f(x99));  // 6 ins 1 outs

    xor6 x29i (.out(x29),.a(x121),.b(c29),.c(x107),.d(x99),.e(x90),.f(1'b0));  // 5 ins 1 outs

    xor6 x28i (.out(x28),.a(c4),.b(x116),.c(x95),.d(d0),.e(x110),.f(x103));  // 6 ins 1 outs

    xor6 x27i (.out(x27),.a(x127),.b(x95),.c(x107),.d(x96),.e(x97),.f(1'b0));  // 5 ins 1 outs

    xor6 x26i (.out(x26),.a(x128),.b(x97),.c(x99),.d(x101),.e(x94),.f(1'b0));  // 5 ins 1 outs

    xor6 x25i (.out(x25),.a(x141),.b(x89),.c(x98),.d(x94),.e(x111),.f(1'b0));  // 5 ins 1 outs

    xor6 x24i (.out(x24),.a(x142),.b(x104),.c(x98),.d(x118),.e(x91),.f(1'b0));  // 5 ins 1 outs

endmodule