57 lines
1.2 KiB
Coq
57 lines
1.2 KiB
Coq
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// Library: calc1
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// Module: Hold Register
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// Author: Naseer Siddique
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module holdreg(hold_data1, hold_data2, hold_prio_req, c_clk, req_cmd_in, req_data_in, reset);
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input c_clk;
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input [0:3] req_cmd_in;
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input [1:7] reset;
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input [0:31] req_data_in;
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output [0:3] hold_prio_req;
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output [0:31] hold_data1, hold_data2;
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reg [0:3] cmd_hold, hold_prio_reg;
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wire [0:3] cmd_hold_q;
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reg [0:31] hold_data1_q, hold_data2_q;
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always
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@ (posedge c_clk) begin
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fork
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cmd_hold[0:3] <= (reset[1] == 1) ? 4'b0 : req_cmd_in[0:3];
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hold_prio_reg[0:3] <= cmd_hold[0:3];
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join
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end
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always
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@ (posedge c_clk) begin
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fork
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hold_data1_q[0:31] <=
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(reset[1]) ? 32'b0 :
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(req_cmd_in[0:3] != 4'b0) ? req_data_in[0:31] :
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hold_data1_q[0:31];
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hold_data2_q[0:31] <=
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(reset[1]) ? 32'b0 : (cmd_hold[0:3] != 4'b0) ?
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req_data_in[0:31] : hold_data2_q[0:31];
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join
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end
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assign hold_data1 = hold_data1_q;
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assign hold_data2 = hold_data2_q;
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assign hold_prio_req = hold_prio_reg;
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endmodule // holdreg
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