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Diffstat (limited to 'usrp/fpga/toplevel/mrfm/shifter.v')
| -rw-r--r-- | usrp/fpga/toplevel/mrfm/shifter.v | 106 |
1 files changed, 0 insertions, 106 deletions
diff --git a/usrp/fpga/toplevel/mrfm/shifter.v b/usrp/fpga/toplevel/mrfm/shifter.v deleted file mode 100644 index dd4d4b527..000000000 --- a/usrp/fpga/toplevel/mrfm/shifter.v +++ /dev/null @@ -1,106 +0,0 @@ -// -*- verilog -*- -// -// USRP - Universal Software Radio Peripheral -// -// Copyright (C) 2005,2006 Matt Ettus -// -// This program is free software; you can redistribute it and/or modify -// it under the terms of the GNU General Public License as published by -// the Free Software Foundation; either version 2 of the License, or -// (at your option) any later version. -// -// This program is distributed in the hope that it will be useful, -// but WITHOUT ANY WARRANTY; without even the implied warranty of -// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the -// GNU General Public License for more details. -// -// You should have received a copy of the GNU General Public License -// along with this program; if not, write to the Free Software -// Foundation, Inc., 51 Franklin Street, Boston, MA 02110-1301 USA -// - -module shifter(input wire [33:0] in, output wire [15:0] out, input wire [7:0] shift); - // Wish we could do assign out = in[15+shift:shift]; - - reg [15:0] quotient, remainder; - wire [15:0] out_unclipped; - reg [18:0] msbs; - wire in_range; - - always @* - case(shift) - 0 : quotient = in[15:0]; - 1 : quotient = in[16:1]; - 2 : quotient = in[17:2]; - 3 : quotient = in[18:3]; - 4 : quotient = in[19:4]; - 5 : quotient = in[20:5]; - 6 : quotient = in[21:6]; - 7 : quotient = in[22:7]; - 8 : quotient = in[23:8]; - 9 : quotient = in[24:9]; - 10 : quotient = in[25:10]; - 11 : quotient = in[26:11]; - 12 : quotient = in[27:12]; - 13 : quotient = in[28:13]; - 14 : quotient = in[29:14]; - 15 : quotient = in[30:15]; - 16 : quotient = in[31:16]; - 17 : quotient = in[32:17]; - 18 : quotient = in[33:18]; - default : quotient = in[15:0]; - endcase // case(shift) - - always @* - case(shift) - 0 : remainder = 16'b0; - 1 : remainder = {in[0],15'b0}; - 2 : remainder = {in[1:0],14'b0}; - 3 : remainder = {in[2:0],13'b0}; - 4 : remainder = {in[3:0],12'b0}; - 5 : remainder = {in[4:0],11'b0}; - 6 : remainder = {in[5:0],10'b0}; - 7 : remainder = {in[6:0],9'b0}; - 8 : remainder = {in[7:0],8'b0}; - 9 : remainder = {in[8:0],7'b0}; - 10 : remainder = {in[9:0],6'b0}; - 11 : remainder = {in[10:0],5'b0}; - 12 : remainder = {in[11:0],4'b0}; - 13 : remainder = {in[12:0],3'b0}; - 14 : remainder = {in[13:0],2'b0}; - 15 : remainder = {in[14:0],1'b0}; - 16 : remainder = in[15:0]; - 17 : remainder = in[16:1]; - 18 : remainder = in[17:2]; - default : remainder = 16'b0; - endcase // case(shift) - - always @* - case(shift) - 0 : msbs = in[33:15]; - 1 : msbs = {in[33],in[33:16]}; - 2 : msbs = {{2{in[33]}},in[33:17]}; - 3 : msbs = {{3{in[33]}},in[33:18]}; - 4 : msbs = {{4{in[33]}},in[33:19]}; - 5 : msbs = {{5{in[33]}},in[33:20]}; - 6 : msbs = {{6{in[33]}},in[33:21]}; - 7 : msbs = {{7{in[33]}},in[33:22]}; - 8 : msbs = {{8{in[33]}},in[33:23]}; - 9 : msbs = {{9{in[33]}},in[33:24]}; - 10 : msbs = {{10{in[33]}},in[33:25]}; - 11 : msbs = {{11{in[33]}},in[33:26]}; - 12 : msbs = {{12{in[33]}},in[33:27]}; - 13 : msbs = {{13{in[33]}},in[33:28]}; - 14 : msbs = {{14{in[33]}},in[33:29]}; - 15 : msbs = {{15{in[33]}},in[33:30]}; - 16 : msbs = {{16{in[33]}},in[33:31]}; - 17 : msbs = {{17{in[33]}},in[33:32]}; - 18 : msbs = {{18{in[33]}},in[33]}; - default : msbs = in[33:15]; - endcase // case(shift) - - assign in_range = &msbs | ~(|msbs); - assign out_unclipped = quotient + (in[33] & |remainder); - assign out = in_range ? out_unclipped : {in[33],{15{~in[33]}}}; - -endmodule // shifter |