Advanced Chip Design- Practical Examples In Verilog Official

always @(posedge gated_clk) q <= d; endmodule

always_comb begin next = state; case (state) IDLE: if (cpu_req) next = TAG_CHECK; TAG_CHECK: if (hit) next = HIT_FILL; else next = MISS_REFILL; ... endcase end // Implement LRU replacement, write-back vs write-through endmodule | Tool | Purpose | |------|---------| | Verilator | Fast simulation + linting | | Yosys | Synthesis to generic netlist | | OpenSTA | Static timing analysis | | GTKWave | Waveform viewing | | SymbiYosys | Formal verification (SVA) | Advanced Chip Design- Practical Examples In Verilog

assign sig_dst = sync; endmodule module async_fifo #(DEPTH=8, WIDTH=16) ( input wclk, rclk, wrst_n, rrst_n, input wr_en, rd_en, input [WIDTH-1:0] wdata, output [WIDTH-1:0] rdata, output full, empty ); reg [WIDTH-1:0] mem [0:DEPTH-1]; reg [$clog2(DEPTH):0] wptr, rptr; // Gray coded always @(posedge gated_clk) q &lt;= d; endmodule always_comb

// Stage 2: Decode & Register Read (combinational) wire [4:0] rs1 = IF_ID_instr[19:15]; wire [4:0] rs2 = IF_ID_instr[24:20]; wire [31:0] reg_data1 = regfile[rs1]; wire [31:0] reg_data2 = regfile[rs2]; output reg sig_dst )

Add write buffer, ECC, and bank interleaving. 4. Clock Domain Crossing (CDC) Example: 2-flop synchronizer (single-bit) module sync_single ( input clk_dst, rst_n, input sig_src, output reg sig_dst ); reg meta, sync;