Merge branch 'master' into mwest/b200_docs

1 files changed, 22 insertions, 0 deletions

diff --git a/fpga/usrp3/lib/io_port2/data_swapper_64.v b/fpga/usrp3/lib/io_port2/data_swapper_64.v
new file mode 100644
index 000000000..89ae6a7c2
--- /dev/null
+++ b/fpga/usrp3/lib/io_port2/data_swapper_64.v
@@ -0,0 +1,22 @@
+//
+// Copyright 2013 Ettus Research LLC
+//
+
+module data_swapper_64 (
+   input  [2:0]   swap_lanes,
+
+   input  [63:0]  i_tdata,
+   output [63:0]  o_tdata
+);
+   localparam SWAP_32B = 3'b100;
+   localparam SWAP_16B = 3'b010;
+   localparam SWAP_8B  = 3'b001;
+
+   wire [63:0] data_p1, data_p2;
+
+   assign data_p1 = (|(swap_lanes & SWAP_32B)) ? { i_tdata[31:0], i_tdata[63:32] } : i_tdata;
+   assign data_p2 = (|(swap_lanes & SWAP_16B)) ? { data_p1[47:32], data_p1[63:48], data_p1[15:0],  data_p1[31:16] } : data_p1;
+   assign o_tdata = (|(swap_lanes & SWAP_8B))  ? { data_p2[55:48], data_p2[63:56], data_p2[39:32], data_p2[47:40], 
+                                                   data_p2[23:16], data_p2[31:24], data_p2[7:0],   data_p2[15:8]  } : data_p2;
+
+endmodule // data_swapper_64