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// ============================================================================

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//   \\__/ o\    (C) 2020-2022  Robert Finch, Waterloo

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//

//      DPDUnpack.sv

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// ============================================================================

import DFPPkg::*;

module DFPUnpack128(i, o);

input DFP128 i;

output DFP128U o;

assign o.sign = i.sign;

assign o.exp = {i.combo[4:3]==2'b11 ? i.combo[2:1] : i.combo[4:3],i.expc};

assign o.nan = i.combo==5'b11111;

assign o.qnan = i.combo==5'b11111 && i.expc[11]==1'b0;

assign o.snan = i.combo==5'b11111 && i.expc[11]==1'b1;

assign o.infinity = i.combo==5'b11110;

DPDDecodeN #(.N(11)) u1 (i.sigc, o.sig[131:0]);

assign o.sig[135:132] = i.combo[4:3]==2'b11 ? {3'b100,i.combo[0]} : {1'b0,i.combo[2:0]};

endmodule

module DFPUnpack96(i, o);

input DFP96 i;

output DFP96U o;

assign o.sign = i.sign;

assign o.exp = {i.combo[4:3]==2'b11 ? i.combo[2:1] : i.combo[4:3],i.expc};

assign o.nan = i.combo==5'b11111;

assign o.qnan = i.combo==5'b11111 && i.expc[9]==1'b0;

assign o.snan = i.combo==5'b11111 && i.expc[9]==1'b1;

assign o.infinity = i.combo==5'b11110;

DPDDecodeN #(.N(8)) u1 (i.sigc, o.sig[95:0]);

assign o.sig[99:96] = i.combo[4:3]==2'b11 ? {3'b100,i.combo[0]} : {1'b0,i.combo[2:0]};

endmodule

module DFPUnpack64(i, o);

input DFP64 i;

output DFP64U o;

assign o.sign = i.sign;

assign o.exp = {i.combo[4:3]==2'b11 ? i.combo[2:1] : i.combo[4:3],i.expc};

assign o.nan = i.combo==5'b11111;

assign o.qnan = i.combo==5'b11111 && i.expc[7]==1'b0;

assign o.snan = i.combo==5'b11111 && i.expc[7]==1'b1;

assign o.infinity = i.combo==5'b11110;

DPDDecodeN #(.N(5)) u1 (i.sigc, o.sig[59:0]);

assign o.sig[63:60] = i.combo[4:3]==2'b11 ? {3'b100,i.combo[0]} : {1'b0,i.combo[2:0]};

endmodule

module DFPUnpack32(i, o);

input DFP32 i;

output DFP32U o;

assign o.sign = i.sign;

assign o.exp = {i.combo[4:3]==2'b11 ? i.combo[2:1] : i.combo[4:3],i.expc};

assign o.nan = i.combo==5'b11111;

assign o.qnan = i.combo==5'b11111 && i.expc[7]==1'b0;

assign o.snan = i.combo==5'b11111 && i.expc[7]==1'b1;

assign o.infinity = i.combo==5'b11110;

DPDDecodeN #(.N(2)) u1 (i.sigc, o.sig[23:0]);

assign o.sig[27:24] = i.combo[4:3]==2'b11 ? {3'b100,i.combo[0]} : {1'b0,i.combo[2:0]};

endmodule