Squashed B200 FPGA Source. Code from Josh Blum, Ian Buckley, and Matt Ettus.

1 files changed, 23 insertions, 0 deletions

diff --git a/fpga/usrp3/lib/dsp/sign_extend.v b/fpga/usrp3/lib/dsp/sign_extend.v
new file mode 100644
index 000000000..7c85920aa
--- /dev/null
+++ b/fpga/usrp3/lib/dsp/sign_extend.v
@@ -0,0 +1,23 @@
+// -*- verilog -*-
+//
+//  USRP - Universal Software Radio Peripheral
+//
+//  Copyright (C) 2003 Matt Ettus
+//
+
+//
+
+
+// Sign extension "macro"
+// bits_out should be greater than bits_in
+
+module sign_extend (in,out);
+	parameter bits_in=0;  // FIXME Quartus insists on a default
+	parameter bits_out=0;
+	
+	input [bits_in-1:0] in;
+	output [bits_out-1:0] out;
+	
+	assign out = {{(bits_out-bits_in){in[bits_in-1]}},in};
+	
+endmodule