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Copy pathsha256_512bit_input.v
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sha256_512bit_input.v
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/****************************************************************************************************/
/* SHA 256 module - 512bit input version */
/* Original Source: Aishwarya Nagarajan, UW-Madison, ERCBench Researcher */
/* Edited and cleaned by: Sebastian Herzberg, TU Dresden */
/* */
/* Inputs: clk, rst, valid,first, last, msg_in (512bits) */
/* Outputs: ready, msg_out (256 bits) */
/* The output is delivered 65 cycles after the last valid input chunk is provided */
/* */
/* */
/* This program is free software: you can redistribute it and/or modify */
/* it under the terms of the GNU General Public License as published by */
/* the Free Software Foundation, either version 3 of the License, or */
/* (at your option) any later version. */
/* */
/* This program is distributed in the hope that it will be useful, */
/* but WITHOUT ANY WARRANTY; without even the implied warranty of */
/* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the */
/* GNU General Public License for more details. */
/* */
/* You should have received a copy of the GNU General Public License */
/* along with this program. If not, see <http://www.gnu.org/licenses/>. */
/* */
/****************************************************************************************************/
module sha_multi_chunks2(
clk,
rst,
valid,
first,
last,
msg_in,
msg_out,
ready
);
input clk, rst, valid, first, last;
input [511:0]msg_in;
output [255:0]msg_out;
output reg ready;
// defining hash localparams
localparam H0 = 32'h6a09e667;
localparam H1 = 32'hbb67ae85;
localparam H2 = 32'h3c6ef372;
localparam H3 = 32'ha54ff53a;
localparam H4 = 32'h510e527f;
localparam H5 = 32'h9b05688c;
localparam H6 = 32'h1f83d9ab;
localparam H7 = 32'h5be0cd19;
// defining round constants
localparam K00 = 32'h428a2f98;
localparam K01 = 32'h71374491;
localparam K02 = 32'hb5c0fbcf;
localparam K03 = 32'he9b5dba5;
localparam K04 = 32'h3956c25b;
localparam K05 = 32'h59f111f1;
localparam K06 = 32'h923f82a4;
localparam K07 = 32'hab1c5ed5;
localparam K08 = 32'hd807aa98;
localparam K09 = 32'h12835b01;
localparam K10 = 32'h243185be;
localparam K11 = 32'h550c7dc3;
localparam K12 = 32'h72be5d74;
localparam K13 = 32'h80deb1fe;
localparam K14 = 32'h9bdc06a7;
localparam K15 = 32'hc19bf174;
localparam K16 = 32'he49b69c1;
localparam K17 = 32'hefbe4786;
localparam K18 = 32'h0fc19dc6;
localparam K19 = 32'h240ca1cc;
localparam K20 = 32'h2de92c6f;
localparam K21 = 32'h4a7484aa;
localparam K22 = 32'h5cb0a9dc;
localparam K23 = 32'h76f988da;
localparam K24 = 32'h983e5152;
localparam K25 = 32'ha831c66d;
localparam K26 = 32'hb00327c8;
localparam K27 = 32'hbf597fc7;
localparam K28 = 32'hc6e00bf3;
localparam K29 = 32'hd5a79147;
localparam K30 = 32'h06ca6351;
localparam K31 = 32'h14292967;
localparam K32 = 32'h27b70a85;
localparam K33 = 32'h2e1b2138;
localparam K34 = 32'h4d2c6dfc;
localparam K35 = 32'h53380d13;
localparam K36 = 32'h650a7354;
localparam K37 = 32'h766a0abb;
localparam K38 = 32'h81c2c92e;
localparam K39 = 32'h92722c85;
localparam K40 = 32'ha2bfe8a1;
localparam K41 = 32'ha81a664b;
localparam K42 = 32'hc24b8b70;
localparam K43 = 32'hc76c51a3;
localparam K44 = 32'hd192e819;
localparam K45 = 32'hd6990624;
localparam K46 = 32'hf40e3585;
localparam K47 = 32'h106aa070;
localparam K48 = 32'h19a4c116;
localparam K49 = 32'h1e376c08;
localparam K50 = 32'h2748774c;
localparam K51 = 32'h34b0bcb5;
localparam K52 = 32'h391c0cb3;
localparam K53 = 32'h4ed8aa4a;
localparam K54 = 32'h5b9cca4f;
localparam K55 = 32'h682e6ff3;
localparam K56 = 32'h748f82ee;
localparam K57 = 32'h78a5636f;
localparam K58 = 32'h84c87814;
localparam K59 = 32'h8cc70208;
localparam K60 = 32'h90befffa;
localparam K61 = 32'ha4506ceb;
localparam K62 = 32'hbef9a3f7;
localparam K63 = 32'hc67178f2;
// declaring input and output regs and wires
reg [6:0] cycle;
wire [6:0] next_cycle;
reg [31:0] a_reg, b_reg, c_reg, d_reg, e_reg, f_reg, g_reg, h_reg;
wire [31:0] w_ex,a_out,b_out,c_out,d_out,e_out,f_out,g_out,h_out ;
reg [31:0] w_16,w_15,w_7,w_2;
reg [31:0] w0,w1,w2,w3,w4,w5,w6,w7,w8,w9,w10,w11,w12,w13,w14,w15,w16,w17,w18,w19,w20,w21,w22,w23,w24,w25,w26,w27,w28,w29,w30,w31,w32,w33,w34,w35,w36,w37,w38,w39,w40,w41,w42,w43,w44,w45,w46,w47,w48,w49,w50,w51,w52,w53,w54,w55,w56,w57,w58,w59,w60,w61,w62,w63;
reg [31:0] k,w_in,a_in,b_in,c_in,d_in,e_in,f_in,g_in,h_in;
//instatiating submodules
extension E (clk, rst, w_16,w_15,w_7,w_2, w_ex);
main_loop M (clk, rst, k,w_in,a_in,b_in,c_in,d_in,e_in,f_in,g_in,h_in, a_out,b_out,c_out,d_out,e_out,f_out,g_out,h_out);
//combinational - assigning next cycle value
assign next_cycle = (cycle == 7'd64)? 7'd0:(cycle+1'b1);
//combinational - assigning value of output message
assign msg_out = {(H0+a_reg+a_out),(H1+b_reg+b_out),(H2+c_reg+c_out),(H3+d_reg+d_out),(H4+e_reg+e_out),(H5+f_reg+f_out),(H6+g_reg+g_out),(H7+h_reg+h_out)};
//combinational - assigning words 0-15
always @(*)begin
if (rst|(!valid)) begin
w0 = 32'b0;
w1 = 32'b0;
w2 = 32'b0;
w3 = 32'b0;
w4 = 32'b0;
w5 = 32'b0;
w6 = 32'b0;
w7 = 32'b0;
w8 = 32'b0;
w9 = 32'b0;
w10 = 32'b0;
w11 = 32'b0;
w12 = 32'b0;
w13 = 32'b0;
w14 = 32'b0;
w15 = 32'b0;
end
else begin
w0 = msg_in[511:480];
w1 = msg_in[479:448];
w2 = msg_in[447:416];
w3 = msg_in[415:384];
w4 = msg_in[383:352];
w5 = msg_in[351:320];
w6 = msg_in[319:288];
w7 = msg_in[287:256];
w8 = msg_in[255:224];
w9 = msg_in[223:192];
w10 = msg_in[191:160];
w11 = msg_in[159:128];
w12 = msg_in[127:96];
w13 = msg_in[95:64];
w14 = msg_in[63:32];
w15 = msg_in[31:0];
end
end
//synchronous - assigning words 16-63, updates the hash values at the beginning of every new chunk of words
always@(posedge clk)begin
if (rst|(!valid)) begin
cycle <= 7'd0;
end
else begin
cycle <= next_cycle;
case (next_cycle)
'd0: begin // updating the hash values from previous round
a_reg <= a_out;
b_reg <= b_out;
c_reg <= c_out;
d_reg <= d_out;
e_reg <= e_out;
f_reg <= f_out;
g_reg <= g_out;
h_reg <= h_out;
end
'd2: w16 <= w_ex;
'd3: w17 <= w_ex;
'd4: w18 <= w_ex;
'd5: w19 <= w_ex;
'd6: w20 <= w_ex;
'd7: w21 <= w_ex;
'd8: w22 <= w_ex;
'd9: w23 <= w_ex;
'd10: w24 <= w_ex;
'd11: w25 <= w_ex;
'd12: w26 <= w_ex;
'd13: w27 <= w_ex;
'd14: w28 <= w_ex;
'd15: w29 <= w_ex;
'd16: w30 <= w_ex;
'd17: w31 <= w_ex;
'd18: w32 <= w_ex;
'd19: w33 <= w_ex;
'd20: w34 <= w_ex;
'd21: w35 <= w_ex;
'd22: w36 <= w_ex;
'd23: w37 <= w_ex;
'd24: w38 <= w_ex;
'd25: w39 <= w_ex;
'd26: w40 <= w_ex;
'd27: w41 <= w_ex;
'd28: w42 <= w_ex;
'd29: w43 <= w_ex;
'd30: w44 <= w_ex;
'd31: w45 <= w_ex;
'd32: w46 <= w_ex;
'd33: w47 <= w_ex;
'd34: w48 <= w_ex;
'd35: w49 <= w_ex;
'd36: w50 <= w_ex;
'd37: w51 <= w_ex;
'd38: w52 <= w_ex;
'd39: w53 <= w_ex;
'd40: w54 <= w_ex;
'd41: w55 <= w_ex;
'd42: w56 <= w_ex;
'd43: w57 <= w_ex;
'd44: w58 <= w_ex;
'd45: w59 <= w_ex;
'd46: w60 <= w_ex;
'd47: w61 <= w_ex;
'd48: w62 <= w_ex;
'd49: w63 <= w_ex;
endcase
end
end
//combinational - assigning inputs for main_loop and extension module. If last chunk, asserts ready at cycle 65
always@(*)begin
case (cycle)
'd0:begin
if(first) begin
w_16 = w0;
w_15 = w1;
w_7 = w9;
w_2 = w14;
k = K00;
w_in = w0;
a_in = H0;
b_in = H1;
c_in = H2;
d_in = H3;
e_in = H4;
f_in = H5;
g_in = H6;
h_in = H7;
ready = 1'b0;
end
else begin
w_16 = w0;
w_15 = w1;
w_7 = w9;
w_2 = w14;
k = K00;
w_in = w0;
a_in = H0+a_reg;
b_in = H1+b_reg;
c_in = H2+c_reg;
d_in = H3+d_reg;
e_in = H4+e_reg;
f_in = H5+f_reg;
g_in = H6+g_reg;
h_in = H7+h_reg;
ready = 1'b0;
end
end
'd1:begin
w_16 = w1;
w_15 = w2;
w_7 = w10;
w_2 = w15;
k = K01;
w_in = w1;
a_in = a_out;
b_in = b_out;
c_in = c_out;
d_in = d_out;
e_in = e_out;
f_in = f_out;
g_in = g_out;
h_in = h_out;
ready = 1'b0;
end
'd2:begin
w_16 = w2;
w_15 = w3;
w_7 = w11;
w_2 = w16;
k = K02;
w_in = w2;
a_in = a_out;
b_in = b_out;
c_in = c_out;
d_in = d_out;
e_in = e_out;
f_in = f_out;
g_in = g_out;
h_in = h_out;
ready = 1'b0;
end
'd3:begin
w_16 = w3;
w_15 = w4;
w_7 = w12;
w_2 = w17;
k = K03;
w_in = w3;
a_in = a_out;
b_in = b_out;
c_in = c_out;
d_in = d_out;
e_in = e_out;
f_in = f_out;
g_in = g_out;
h_in = h_out;
ready = 1'b0;
end
'd4:begin
w_16 = w4;
w_15 = w5;
w_7 = w13;
w_2 = w18;
k = K04;
w_in = w4;
a_in = a_out;
b_in = b_out;
c_in = c_out;
d_in = d_out;
e_in = e_out;
f_in = f_out;
g_in = g_out;
h_in = h_out;
ready = 1'b0;
end
'd5:begin
w_16 = w5;
w_15 = w6;
w_7 = w14;
w_2 = w19;
k = K05;
w_in = w5;
a_in = a_out;
b_in = b_out;
c_in = c_out;
d_in = d_out;
e_in = e_out;
f_in = f_out;
g_in = g_out;
h_in = h_out;
ready = 1'b0;
end
'd6:begin
w_16 = w6;
w_15 = w7;
w_7 = w15;
w_2 = w20;
k = K06;
w_in = w6;
a_in = a_out;
b_in = b_out;
c_in = c_out;
d_in = d_out;
e_in = e_out;
f_in = f_out;
g_in = g_out;
h_in = h_out;
ready = 1'b0;
end
'd7:begin
w_16 = w7;
w_15 = w8;
w_7 = w16;
w_2 = w21;
k = K07;
w_in = w7;
a_in = a_out;
b_in = b_out;
c_in = c_out;
d_in = d_out;
e_in = e_out;
f_in = f_out;
g_in = g_out;
h_in = h_out;
ready = 1'b0;
end
'd8:begin
w_16 = w8;
w_15 = w9;
w_7 = w17;
w_2 = w22;
k = K08;
w_in = w8;
a_in = a_out;
b_in = b_out;
c_in = c_out;
d_in = d_out;
e_in = e_out;
f_in = f_out;
g_in = g_out;
h_in = h_out;
ready = 1'b0;
end
'd9:begin
w_16 = w9;
w_15 = w10;
w_7 = w18;
w_2 = w23;
k = K09;
w_in = w9;
a_in = a_out;
b_in = b_out;
c_in = c_out;
d_in = d_out;
e_in = e_out;
f_in = f_out;
g_in = g_out;
h_in = h_out;
ready = 1'b0;
end
'd10:begin
w_16 = w10;
w_15 = w11;
w_7 = w19;
w_2 = w24;
k = K10;
w_in = w10;
a_in = a_out;
b_in = b_out;
c_in = c_out;
d_in = d_out;
e_in = e_out;
f_in = f_out;
g_in = g_out;
h_in = h_out;
ready = 1'b0;
end
'd11:begin
w_16 = w11;
w_15 = w12;
w_7 = w20;
w_2 = w25;
k = K11;
w_in = w11;
a_in = a_out;
b_in = b_out;
c_in = c_out;
d_in = d_out;
e_in = e_out;
f_in = f_out;
g_in = g_out;
h_in = h_out;
ready = 1'b0;
end
'd12:begin
w_16 = w12;
w_15 = w13;
w_7 = w21;
w_2 = w26;
k = K12;
w_in = w12;
a_in = a_out;
b_in = b_out;
c_in = c_out;
d_in = d_out;
e_in = e_out;
f_in = f_out;
g_in = g_out;
h_in = h_out;
ready = 1'b0;
end
'd13:begin
w_16 = w13;
w_15 = w14;
w_7 = w22;
w_2 = w27;
k = K13;
w_in = w13;
a_in = a_out;
b_in = b_out;
c_in = c_out;
d_in = d_out;
e_in = e_out;
f_in = f_out;
g_in = g_out;
h_in = h_out;
ready = 1'b0;
end
'd14:begin
w_16 = w14;
w_15 = w15;
w_7 = w23;
w_2 = w28;
k = K14;
w_in = w14;
a_in = a_out;
b_in = b_out;
c_in = c_out;
d_in = d_out;
e_in = e_out;
f_in = f_out;
g_in = g_out;
h_in = h_out;
ready = 1'b0;
end
'd15:begin
w_16 = w15;
w_15 = w16;
w_7 = w24;
w_2 = w29;
k = K15;
w_in = w15;
a_in = a_out;
b_in = b_out;
c_in = c_out;
d_in = d_out;
e_in = e_out;
f_in = f_out;
g_in = g_out;
h_in = h_out;
ready = 1'b0;
end
'd16:begin
w_16 = w16;
w_15 = w17;
w_7 = w25;
w_2 = w30;
k = K16;
w_in = w16;
a_in = a_out;
b_in = b_out;
c_in = c_out;
d_in = d_out;
e_in = e_out;
f_in = f_out;
g_in = g_out;
h_in = h_out;
ready = 1'b0;
end
'd17:begin
w_16 = w17;
w_15 = w18;
w_7 = w26;
w_2 = w31;
k = K17;
w_in = w17;
a_in = a_out;
b_in = b_out;
c_in = c_out;
d_in = d_out;
e_in = e_out;
f_in = f_out;
g_in = g_out;
h_in = h_out;
ready = 1'b0;
end
'd18:begin
w_16 = w18;
w_15 = w19;
w_7 = w27;
w_2 = w32;
k = K18;
w_in = w18;
a_in = a_out;
b_in = b_out;
c_in = c_out;
d_in = d_out;
e_in = e_out;
f_in = f_out;
g_in = g_out;
h_in = h_out;
ready = 1'b0;
end
'd19:begin
w_16 = w19;
w_15 = w20;
w_7 = w28;
w_2 = w33;
k = K19;
w_in = w19;
a_in = a_out;
b_in = b_out;
c_in = c_out;
d_in = d_out;
e_in = e_out;
f_in = f_out;
g_in = g_out;
h_in = h_out;
ready = 1'b0;
end
'd20:begin
w_16 = w20;
w_15 = w21;
w_7 = w29;
w_2 = w34;
k = K20;
w_in = w20;
a_in = a_out;
b_in = b_out;
c_in = c_out;
d_in = d_out;
e_in = e_out;
f_in = f_out;
g_in = g_out;
h_in = h_out;
ready = 1'b0;
end
'd21:begin
w_16 = w21;
w_15 = w22;
w_7 = w30;
w_2 = w35;
k = K21;
w_in = w21;
a_in = a_out;
b_in = b_out;
c_in = c_out;
d_in = d_out;
e_in = e_out;
f_in = f_out;
g_in = g_out;
h_in = h_out;
ready = 1'b0;
end
'd22:begin
w_16 = w22;
w_15 = w23;
w_7 = w31;
w_2 = w36;
k = K22;
w_in = w22;
a_in = a_out;
b_in = b_out;
c_in = c_out;
d_in = d_out;
e_in = e_out;
f_in = f_out;
g_in = g_out;
h_in = h_out;
ready = 1'b0;
end
'd23:begin
w_16 = w23;
w_15 = w24;
w_7 = w32;
w_2 = w37;
k = K23;
w_in = w23;
a_in = a_out;
b_in = b_out;
c_in = c_out;
d_in = d_out;
e_in = e_out;
f_in = f_out;
g_in = g_out;
h_in = h_out;
ready = 1'b0;
end
'd24:begin
w_16 = w24;
w_15 = w25;
w_7 = w33;
w_2 = w38;
k = K24;
w_in = w24;
a_in = a_out;
b_in = b_out;
c_in = c_out;
d_in = d_out;
e_in = e_out;
f_in = f_out;
g_in = g_out;
h_in = h_out;
ready = 1'b0;
end
'd25:begin
w_16 = w25;
w_15 = w26;
w_7 = w34;
w_2 = w39;
k = K25;
w_in = w25;
a_in = a_out;
b_in = b_out;
c_in = c_out;
d_in = d_out;
e_in = e_out;
f_in = f_out;
g_in = g_out;
h_in = h_out;
ready = 1'b0;
end
'd26:begin
w_16 = w26;
w_15 = w27;
w_7 = w35;
w_2 = w40;
k = K26;
w_in = w26;
a_in = a_out;
b_in = b_out;
c_in = c_out;
d_in = d_out;
e_in = e_out;
f_in = f_out;
g_in = g_out;
h_in = h_out;
ready = 1'b0;
end
'd27:begin
w_16 = w27;
w_15 = w28;
w_7 = w36;
w_2 = w41;
k = K27;
w_in = w27;
a_in = a_out;
b_in = b_out;
c_in = c_out;
d_in = d_out;
e_in = e_out;
f_in = f_out;
g_in = g_out;
h_in = h_out;
ready = 1'b0;
end
'd28:begin
w_16 = w28;
w_15 = w29;
w_7 = w37;
w_2 = w42;
k = K28;
w_in = w28;
a_in = a_out;
b_in = b_out;
c_in = c_out;
d_in = d_out;
e_in = e_out;
f_in = f_out;
g_in = g_out;
h_in = h_out;
ready = 1'b0;
end
'd29:begin
w_16 = w29;
w_15 = w30;
w_7 = w38;
w_2 = w43;
k = K29;
w_in = w29;
a_in = a_out;
b_in = b_out;
c_in = c_out;
d_in = d_out;
e_in = e_out;
f_in = f_out;
g_in = g_out;
h_in = h_out;
ready = 1'b0;
end
'd30:begin
w_16 = w30;
w_15 = w31;
w_7 = w39;
w_2 = w44;
k = K30;
w_in = w30;
a_in = a_out;
b_in = b_out;
c_in = c_out;
d_in = d_out;
e_in = e_out;
f_in = f_out;
g_in = g_out;
h_in = h_out;
ready = 1'b0;
end
'd31:begin
w_16 = w31;
w_15 = w32;
w_7 = w40;
w_2 = w45;
k = K31;
w_in = w31;
a_in = a_out;
b_in = b_out;
c_in = c_out;
d_in = d_out;
e_in = e_out;
f_in = f_out;
g_in = g_out;
h_in = h_out;
ready = 1'b0;
end
'd32:begin
w_16 = w32;
w_15 = w33;
w_7 = w41;
w_2 = w46;
k = K32;
w_in = w32;
a_in = a_out;
b_in = b_out;
c_in = c_out;
d_in = d_out;
e_in = e_out;
f_in = f_out;
g_in = g_out;
h_in = h_out;
ready = 1'b0;
end
'd33:begin
w_16 = w33;
w_15 = w34;
w_7 = w42;
w_2 = w47;
k = K33;
w_in = w33;
a_in = a_out;
b_in = b_out;
c_in = c_out;
d_in = d_out;
e_in = e_out;
f_in = f_out;
g_in = g_out;
h_in = h_out;
ready = 1'b0;
end
'd34:begin
w_16 = w34;
w_15 = w35;
w_7 = w43;
w_2 = w48;
k = K34;
w_in = w34;
a_in = a_out;
b_in = b_out;
c_in = c_out;
d_in = d_out;
e_in = e_out;
f_in = f_out;
g_in = g_out;
h_in = h_out;
ready = 1'b0;
end
'd35:begin
w_16 = w35;
w_15 = w36;
w_7 = w44;
w_2 = w49;
k = K35;
w_in = w35;
a_in = a_out;
b_in = b_out;
c_in = c_out;
d_in = d_out;
e_in = e_out;
f_in = f_out;
g_in = g_out;
h_in = h_out;
ready = 1'b0;
end
'd36:begin
w_16 = w36;
w_15 = w37;
w_7 = w45;
w_2 = w50;
k = K36;
w_in = w36;
a_in = a_out;
b_in = b_out;
c_in = c_out;
d_in = d_out;
e_in = e_out;
f_in = f_out;
g_in = g_out;
h_in = h_out;
ready = 1'b0;
end
'd37:begin
w_16 = w37;
w_15 = w38;
w_7 = w46;
w_2 = w51;
k = K37;
w_in = w37;
a_in = a_out;
b_in = b_out;
c_in = c_out;
d_in = d_out;
e_in = e_out;
f_in = f_out;
g_in = g_out;
h_in = h_out;
ready = 1'b0;
end
'd38:begin
w_16 = w38;
w_15 = w39;
w_7 = w47;
w_2 = w52;
k = K38;
w_in = w38;
a_in = a_out;
b_in = b_out;
c_in = c_out;
d_in = d_out;
e_in = e_out;
f_in = f_out;
g_in = g_out;
h_in = h_out;
ready = 1'b0;
end
'd39:begin
w_16 = w39;
w_15 = w40;
w_7 = w48;
w_2 = w53;
k = K39;
w_in = w39;
a_in = a_out;
b_in = b_out;
c_in = c_out;
d_in = d_out;
e_in = e_out;
f_in = f_out;
g_in = g_out;
h_in = h_out;
ready = 1'b0;
end
'd40:begin
w_16 = w40;
w_15 = w41;
w_7 = w49;
w_2 = w54;
k = K40;
w_in = w40;
a_in = a_out;
b_in = b_out;
c_in = c_out;
d_in = d_out;
e_in = e_out;
f_in = f_out;
g_in = g_out;
h_in = h_out;
ready = 1'b0;
end
'd41:begin
w_16 = w41;
w_15 = w42;
w_7 = w50;
w_2 = w55;
k = K41;
w_in = w41;
a_in = a_out;
b_in = b_out;
c_in = c_out;
d_in = d_out;
e_in = e_out;
f_in = f_out;
g_in = g_out;
h_in = h_out;
ready = 1'b0;
end
'd42:begin
w_16 = w42;
w_15 = w43;
w_7 = w51;
w_2 = w56;
k = K42;
w_in = w42;
a_in = a_out;
b_in = b_out;
c_in = c_out;
d_in = d_out;
e_in = e_out;
f_in = f_out;
g_in = g_out;