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89 lines
4.1 KiB
Verilog
89 lines
4.1 KiB
Verilog
// CMYK Adaptive Router
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// Derived from docs/semantics/ADAPTIVE_1BIT_CMYK_MERGED.md
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// Implements stress-based routing state machine
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`timescale 1ns / 1ps
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module cmyk_adaptive_router (
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input wire clk,
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input wire rst_n,
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input wire [31:0] v_t, // Q16.16 input signal
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input wire [31:0] m_t, // Q16.16 metaprobe stress
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input wire [31:0] delta_t, // Q16.16 delta stress
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output reg [1:0] state, // 00=K, 01=C, 10=M, 11=Y
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output reg [31:0] residual, // e_t: Error residual
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output reg gate_open // Control signal for data emission
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);
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// ═══════════════════════════════════════════════════════════════════════════
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// Parameters (Match Lean FabricConfig)
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// ═══════════════════════════════════════════════════════════════════════════
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parameter DELTA_PHI = 32'h12345678;
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parameter PHI_SHIFT = 5'd24;
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parameter MASK = 32'h000000AA;
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parameter SLUQ_SHIFT = 5'd4;
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parameter LAMBDA1 = 32'h00008000; // 0.5
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parameter LAMBDA2 = 32'h00004000; // 0.25
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parameter LAMBDA3 = 32'h00004000; // 0.25
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// ═══════════════════════════════════════════════════════════════════════════
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// Internal Registers
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// ═══════════════════════════════════════════════════════════════════════════
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reg [31:0] phi;
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reg [31:0] sluq_acc;
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// LUT for Threshold (Simplified 256-entry uniform for PoC)
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wire [31:0] theta_t = 32'h00008000; // 0.5
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// ═══════════════════════════════════════════════════════════════════════════
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// Adaptive Update Loop (Match Lean step function)
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// ═══════════════════════════════════════════════════════════════════════════
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wire [31:0] abs_residual = residual[31] ? (~residual + 1) : residual;
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// Fixed-point multiply helper (Q16.16)
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function [31:0] q_mul;
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input [31:0] a, b;
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reg [63:0] prod;
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begin
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prod = {{32{a[31]}}, a} * {{32{b[31]}}, b};
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q_mul = prod[47:16];
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end
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endfunction
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always @(posedge clk or negedge rst_n) begin
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if (!rst_n) begin
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phi <= 0;
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residual <= 0;
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sluq_acc <= 0;
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state <= 2'b00;
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gate_open <= 1'b1;
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end else begin
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// 1. φ-Accumulator
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phi <= phi + DELTA_PHI;
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// 2. 1-Bit Noise-Shaped Encoder
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// b_t = 1 if v_t + e_{t-1} > θ_t else 0
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if ((v_t + residual) > theta_t) begin
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residual <= (v_t + residual) - 32'h00010000; // b_t = 1.0
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end else begin
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residual <= (v_t + residual); // b_t = 0.0
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end
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// 3. SLUQ Routing Accumulator
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// a_{t+1} = a_t - (a_t >> r) + λ_1 |e_t| + λ_2 Δ_t + λ_3 m_t
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sluq_acc <= sluq_acc - (sluq_acc >> SLUQ_SHIFT) +
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q_mul(LAMBDA1, abs_residual) +
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q_mul(LAMBDA2, delta_t) +
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q_mul(LAMBDA3, m_t);
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// 4. CMYK State Classification
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// s_t = a_t >> 14
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state <= sluq_acc[15:14]; // Taking the relevant bits for state
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// Gate Control
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gate_open <= (sluq_acc[15:14] < 2'b10); // K and C are open, M and Y are closed
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end
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end
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endmodule
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