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// ============================================================================
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// ============================================================================
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// __
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// __
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// \\__/ o\ (C) 2020-2021 Robert Finch, Waterloo
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// \\__/ o\ (C) 2020-2022 Robert Finch, Waterloo
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// \ __ / All rights reserved.
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// \ __ / All rights reserved.
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// \/_// robfinch@finitron.ca
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// \/_// robfinch@finitron.ca
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// ||
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// ||
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//
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//
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// DFPPkg.sv
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// DFPPkg.sv
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package DFPPkg;
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package DFPPkg;
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`define SUPPORT_DENORMALS 1'b1
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`define SUPPORT_DENORMALS 1'b1
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`define QINFDIV 4'd2
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`define QZEROZERO 4'd3
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typedef struct packed
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typedef struct packed
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{
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{
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logic sign;
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logic sign;
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logic [4:0] combo;
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logic [4:0] combo;
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logic [14:0] expc; // exponent continuation field
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logic [14:0] expc; // exponent continuation field
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logic [4:0] combo;
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logic [4:0] combo;
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logic [11:0] expc; // exponent continuation field
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logic [11:0] expc; // exponent continuation field
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logic [109:0] sigc; // significand continuation field
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logic [109:0] sigc; // significand continuation field
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} DFP128;
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} DFP128;
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// Packed 128 bit (storage) format
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typedef struct packed
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{
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logic sign;
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logic [4:0] combo;
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logic [9:0] expc; // exponent continuation field
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logic [79:0] sigc; // significand continuation field
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} DFP96;
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typedef logic [11:0] DFP96EXP;
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typedef logic [99:0] DFP96SIG;
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typedef logic [13:0] DFP128EXP;
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typedef logic [13:0] DFP128EXP;
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typedef logic [135:0] DFP128SIG;
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typedef logic [135:0] DFP128SIG;
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// Unpacked 96 bit format
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typedef struct packed
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{
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logic nan;
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logic qnan;
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logic snan;
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logic infinity;
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logic sign;
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logic [11:0] exp;
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logic [99:0] sig; // significand 25 digits
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} DFP96U;
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// Unpacked 128 bit format
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// Unpacked 128 bit format
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typedef struct packed
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typedef struct packed
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{
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{
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logic nan;
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logic nan;
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logic qnan;
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logic qnan;
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logic nan;
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logic nan;
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logic qnan;
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logic qnan;
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logic snan;
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logic snan;
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logic infinity;
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logic infinity;
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logic sign;
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logic sign;
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logic [11:0] exp;
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logic [103:0] sig; // significand 26 digits
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} DFP96UN;
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// Normalizer output to rounding, one extra digit
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typedef struct packed
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{
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logic nan;
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logic qnan;
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logic snan;
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logic infinity;
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logic sign;
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logic [13:0] exp;
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logic [13:0] exp;
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logic [139:0] sig; // significand 35 digits
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logic [139:0] sig; // significand 35 digits
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} DFP128UN;
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} DFP128UN;
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// 96-bit Double width significand, normalizer input
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typedef struct packed
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{
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logic nan;
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logic qnan;
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logic snan;
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logic infinity;
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logic sign;
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logic [11:0] exp;
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logic [207:0] sig; // significand 50+ 1 lead, 1-trail digit
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} DFP96UD;
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// 128-bit Double width significand, normalizer input
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// 128-bit Double width significand, normalizer input
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typedef struct packed
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typedef struct packed
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{
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{
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logic nan;
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logic nan;
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logic qnan;
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logic qnan;
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