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9 |
Papayaved |
clc
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| 2 |
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clear
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| 3 |
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close all
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POW_MAX = 16;
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fid = fopen('W_int32.sv', 'w');
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| 9 |
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fprintf(fid, '`ifndef _fft_w_\n');
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fprintf(fid, '`define _fft_w_\n');
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fprintf(fid, '`include "round32.sv"\n\n');
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fprintf(fid, 'module W_int32 #(parameter POW, W_WIDTH)(clk, k, W_Re, W_Im);\n');
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fprintf(fid, '// N = 2**POW, Max POW = 10, Max W_WIDTH = 32\n');
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fprintf(fid, '// File contains the rotate coefficients\n');
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fprintf(fid, '// W(k, N) = exp(-2i * pi * k / N)\n');
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fprintf(fid, '// in the scale W * 2^30\n\n');
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fprintf(fid, ' input wire clk;\n');
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fprintf(fid, ' input wire [POW-2:0] k;\n');
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fprintf(fid, ' output wire signed [W_WIDTH-1:0] W_Re, W_Im;\n\n');
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fprintf(fid, ' generate\n');
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fprintf(fid, ' if (POW == 1)\n');
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fprintf(fid, ' begin\n');
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w = W(0, 2) * 2^30;
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bit32 = IntToBit32(real(w));
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fprintf(fid, ' localparam bit signed [31:0] W_Re_table = 32''sh%08x;\n', bit32);
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bit32 = IntToBit32(imag(w));
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fprintf(fid, ' localparam bit signed [31:0] W_Im_table = 32''sh%08x;\n\n', bit32);
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fprintf(fid, ' round32 #(.WIDTH(W_WIDTH)) round_re(W_Re_table, W_Re);\n');
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fprintf(fid, ' round32 #(.WIDTH(W_WIDTH)) round_im(W_Im_table, W_Im);\n');
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fprintf(fid, ' end\n');
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for POW = 2:POW_MAX
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fprintf(fid, ' else if (POW == %d)\n', POW);
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fprintf(fid, ' begin\n');
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fprintf(fid, ' reg signed [31:0] W_Re_table[%d] = ''{\n', 2^(POW-1));
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fprintf(fid, ' ');
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for i=1:2^(POW-1)
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w = W(i-1, 2^POW) * 2^30;
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bit32 = IntToBit32(real(w));
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if i ~= 2^(POW-1)
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fprintf(fid, '32''sh%08x, ', bit32);
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if mod(i, 8) == 0
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fprintf(fid, '\n');
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fprintf(fid, ' ');
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end
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else
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fprintf(fid, '32''sh%08x\n', bit32);
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fprintf(fid, ' };\n\n');
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end
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end
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fprintf(fid, ' reg signed [31:0] W_Im_table[%d] = ''{\n', 2^(POW-1));
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fprintf(fid, ' ');
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for i=1:2^(POW-1)
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w = W(i-1, 2^POW) * 2^30;
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bit32 = IntToBit32(imag(w));
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if i ~= 2^(POW-1)
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fprintf(fid, '32''sh%08x, ', bit32);
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if mod(i, 8) == 0
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fprintf(fid, '\n');
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fprintf(fid, ' ');
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end
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else
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fprintf(fid, '32''sh%08x\n', bit32);
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fprintf(fid, ' };\n\n');
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end
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end
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fprintf(fid, ' reg signed [31:0] W_Re_reg, W_Im_reg;\n');
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fprintf(fid, ' always_ff @(posedge clk) begin\n');
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fprintf(fid, ' W_Re_reg <= W_Re_table[k];\n');
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fprintf(fid, ' W_Im_reg <= W_Im_table[k];\n');
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fprintf(fid, ' end\n\n');
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fprintf(fid, ' round32 #(.WIDTH(W_WIDTH)) round_re(W_Re_reg, W_Re);\n');
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fprintf(fid, ' round32 #(.WIDTH(W_WIDTH)) round_im(W_Im_reg, W_Im);\n');
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fprintf(fid, ' end\n');
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end
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fprintf(fid, ' endgenerate\n');
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fprintf(fid, 'endmodule :W_int32\n\n');
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fprintf(fid, '`endif\n');
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| 91 |
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fclose(fid);
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