Advanced Chip Design- Practical Examples In Verilog -

// Tag SRAM, Data SRAM, LRU bits reg [19:0] tag [0:WAYS-1][0:LINE_SIZE-1]; reg [255:0] data [0:WAYS-1][0:LINE_SIZE-1];

// Stage 1: Instruction Fetch always @(posedge clk or negedge rst_n) begin if (!rst_n) begin pc <= 32'b0; IF_ID_instr <= 32'b0; end else begin pc <= pc_next; IF_ID_instr <= instr_mem_data; IF_ID_pc <= pc; end end Advanced Chip Design- Practical Examples In Verilog

always @(posedge gated_clk) q <= d; endmodule // Tag SRAM, Data SRAM, LRU bits reg

always @(posedge HCLK or negedge HRESETn) begin if (!HRESETn) HREADYOUT <= 1'b1; else begin if (HREADY && HTRANS == NONSEQ) begin if (HWRITE) memory[HADDR[11:2]] <= HWDATA; else HRDATA <= memory[HADDR[11:2]]; HREADYOUT <= 1'b1; end else HREADYOUT <= 1'b1; // wait-state insertion possible end end endmodule // Tag SRAM

always @(posedge clk_dst or negedge rst_n) begin if (!rst_n) sync, meta <= 2'b00; else sync, meta <= meta, sig_src; end

wire [3:0] wgray = wptr ^ (wptr >> 1); wire [3:0] rgray = rptr ^ (rptr >> 1);

// ALU inside execute wire [31:0] alu_out = (opcode == ADD) ? ID_EX_rs1 + ID_EX_rs2 : ...;