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Re-remove FFT module (leaked in from main merge)

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FallenSigh
2026-06-25 00:51:54 +08:00
parent acb158a392
commit 828612164a
8 changed files with 4 additions and 1958 deletions
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32
rtl/ip/fft/Butterfly.v
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@@ -1,32 +0,0 @@
//----------------------------------------------------------------------
// Butterfly: Add/Sub and Scaling
//----------------------------------------------------------------------
module Butterfly #(
parameter WIDTH = 16,
parameter RH = 0 // Round Half Up
)(
input signed [WIDTH-1:0] x0_re, // Input Data #0 (Real)
input signed [WIDTH-1:0] x0_im, // Input Data #0 (Imag)
input signed [WIDTH-1:0] x1_re, // Input Data #1 (Real)
input signed [WIDTH-1:0] x1_im, // Input Data #1 (Imag)
output signed [WIDTH-1:0] y0_re, // Output Data #0 (Real)
output signed [WIDTH-1:0] y0_im, // Output Data #0 (Imag)
output signed [WIDTH-1:0] y1_re, // Output Data #1 (Real)
output signed [WIDTH-1:0] y1_im // Output Data #1 (Imag)
);
wire signed [WIDTH:0] add_re, add_im, sub_re, sub_im;
// Add/Sub
assign add_re = x0_re + x1_re;
assign add_im = x0_im + x1_im;
assign sub_re = x0_re - x1_re;
assign sub_im = x0_im - x1_im;
// Scaling
assign y0_re = (add_re + RH) >>> 1;
assign y0_im = (add_im + RH) >>> 1;
assign y1_re = (sub_re + RH) >>> 1;
assign y1_im = (sub_im + RH) >>> 1;
endmodule