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`include "positConfig.sv"
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`include "positConfig.sv"
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// Decompose a posit number.
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// Decompose a posit number.
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module positDecompose(i, sgn, rgs, rgm, exp, sig, zer, inf);
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module positDecompose(i, sgn, rgs, rgm, exp, sig, zer, inf);
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`include "positSize.sv"
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`include "positSize.sv"
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localparam rs = $clog2(PSTWID-1);
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input [PSTWID-1:0] i;
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input [PSTWID-1:0] i;
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output sgn; // sign of number
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output sgn; // sign of number
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output rgs; // sign of regime
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output rgs; // sign of regime
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output [$clog2(PSTWID)-1:0] rgm; // regime (absolute value)
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output [rs:0] rgm; // regime (absolute value)
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output [es-1:0] exp; // exponent
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output [es-1:0] exp; // exponent
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output [PSTWID-es-1:0] sig; // significand
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output [PSTWID-1-es:0] sig; // significand
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output zer; // number is zero
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output zer; // number is zero
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output inf; // number is infinite
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output inf; // number is infinite
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wire [$clog2(PSTWID-2):0] lzcnt;
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wire [rs:0] lzcnt;
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wire [$clog2(PSTWID-2):0] locnt;
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wire [rs:0] locnt;
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assign sgn = i[PSTWID-1];
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assign sgn = i[PSTWID-1];
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assign inf = ~|i[PSTWID-2:0] & i[PSTWID-1];
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assign inf = ~|i[PSTWID-2:0] & i[PSTWID-1];
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assign zer = ~|i;
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assign zer = ~|i;
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positCntlz #(PSTWID) u1 (.i(ii[PSTWID-2:0]), .o(lzcnt));
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positCntlz #(PSTWID) u1 (.i(ii[PSTWID-2:0]), .o(lzcnt));
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positCntlo #(PSTWID) u2 (.i(ii[PSTWID-2:0]), .o(locnt));
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positCntlo #(PSTWID) u2 (.i(ii[PSTWID-2:0]), .o(locnt));
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assign rgm = rgs ? locnt - 1 : lzcnt;
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assign rgm = rgs ? locnt - 1 : lzcnt;
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wire [$clog2(PSTWID)-1:0] shamt = rgs ? locnt + 2'd1 : lzcnt + 2'd1;
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wire [rs:0] shamt = rgs ? locnt + 2'd1 : lzcnt + 2'd1;
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wire [PSTWID-1:0] tmp = ii << shamt;
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wire [PSTWID-1:0] tmp = ii << shamt;
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assign exp = |es ? tmp[PSTWID-2:PSTWID-1-es] : 0;
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assign exp = |es ? tmp[PSTWID-2:PSTWID-1-es] : 0;
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assign sig = {~zer,tmp[PSTWID-2-es:0]};
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assign sig = {~zer,tmp[PSTWID-2-es:0]};
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endmodule
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endmodule
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