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Diffstat (limited to 'fpga/usrp3/lib/vita/float_to_iq.v')
-rw-r--r-- | fpga/usrp3/lib/vita/float_to_iq.v | 79 |
1 files changed, 0 insertions, 79 deletions
diff --git a/fpga/usrp3/lib/vita/float_to_iq.v b/fpga/usrp3/lib/vita/float_to_iq.v deleted file mode 100644 index c7efbc4d3..000000000 --- a/fpga/usrp3/lib/vita/float_to_iq.v +++ /dev/null @@ -1,79 +0,0 @@ -module float_to_iq - - #(parameter BITS_IN = 32, - parameter BITS_OUT = 16 - ) - - ( - - input [31:0] in, - output [15:0] out - ); - - //flags - - wire neg_inf; - wire pos_inf; - wire denorm; - wire tiny_exp; - - - - assign pos_inf = (in[31] == 0 && in[30:23] == 1 && in[22:0] == 0); - assign neg_inf = (in[31] == 1 && in[30:23] == 1 && in[22:0] == 0); - assign denorm = (in[30:23] == 0); - assign tiny_exp = (in[30:23] < 'd111); - - - - - - - wire [23:0] implied_bit_fraction; - wire [24:0] operation_round; - wire [15:0] round_fraction; - wire [15:0] shifted_fraction; - wire [7:0] shift_val; - - wire [22:0] true_frac; - - - - - assign shift_val = (in[30:23] > 127)? (in[30:23] - 127): (127 - in[30:23]); - assign implied_bit_fraction = {1'b1,in[22:0]}; - - - - assign operation_round = (implied_bit_fraction + 'h000080); - - - //testing for overflow - assign round_fraction = (operation_round[24] == 0)?(operation_round[23:8]):(16'h7FFF); - //shift the rounded value - wire [15:0] shift = round_fraction >> (15 - shift_val); - //2's complement the shifted output if the signed bit is 1 - wire [15:0] final_val = (in[31] == 1)?(~shift + 1'b1):shift; - - - - assign out = (pos_inf)?{1'b0,15'h7FFF}:(neg_inf)?{1'b1,15'h8000}:(denorm || tiny_exp)? 16'b0: final_val; - - - -endmodule - - - - - - - - - - - - - - - |