From 0df4b801a34697f2058b4a7b95e08d2a0576c9db Mon Sep 17 00:00:00 2001
From: Ben Hilburn <ben.hilburn@ettus.com>
Date: Thu, 10 Oct 2013 10:17:27 -0700
Subject: Squashed B200 FPGA Source. Code from Josh Blum, Ian Buckley, and Matt
 Ettus.

---
 fpga/usrp3/lib/dsp/clip.v | 24 ++++++++++++++++++++++++
 1 file changed, 24 insertions(+)
 create mode 100644 fpga/usrp3/lib/dsp/clip.v

(limited to 'fpga/usrp3/lib/dsp/clip.v')

diff --git a/fpga/usrp3/lib/dsp/clip.v b/fpga/usrp3/lib/dsp/clip.v
new file mode 100644
index 000000000..294c5e8ba
--- /dev/null
+++ b/fpga/usrp3/lib/dsp/clip.v
@@ -0,0 +1,24 @@
+// -*- verilog -*-
+//
+//  USRP - Universal Software Radio Peripheral
+//
+//  Copyright (C) 2008 Matt Ettus
+//
+
+//
+
+// Clipping "macro", keeps the bottom bits
+
+module clip
+  #(parameter bits_in=0,
+    parameter bits_out=0)
+    (input [bits_in-1:0] in,
+     output [bits_out-1:0] out);
+   
+   wire 		   overflow = |in[bits_in-1:bits_out-1] & ~(&in[bits_in-1:bits_out-1]);   
+   assign 		   out = overflow ? 
+			   (in[bits_in-1] ? {1'b1,{(bits_out-1){1'b0}}} : {1'b0,{(bits_out-1){1'b1}}}) :
+			   in[bits_out-1:0];
+   
+endmodule // clip
+
-- 
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