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package gfx;
typedef logic[31:0] float_word;
typedef logic[7:0] float_exp;
typedef logic[$bits(float_word) - $bits(float_exp) - 2:0] float_mant;
typedef logic[$bits(float_mant):0] float_mant_full; // Incluye '1.' explícito
localparam float_exp FLOAT_EXP_BIAS = (1 << ($bits(float_exp) - 1)) - 1;
localparam float_exp FLOAT_EXP_MAX = {($bits(float_exp)){1'b1}};
function float_mant_full full_mant(float_mant in);
full_mant = {1'b1, in};
endfunction
function float_mant implicit_mant(float_mant_full in);
assert (in[$bits(in) - 1]);
implicit_mant = in[$bits(in) - 2:0];
endfunction
typedef struct packed
{
logic sign;
float_exp exp;
float_mant mant;
} float;
/* Explicación de guard, round, sticky:
* https://drilian.com/2023/01/10/floating-point-numbers-and-rounding/
*/
typedef struct packed
{
float normal;
logic slow,
zero,
guard,
round,
sticky;
} float_round;
typedef struct packed
{
float val;
logic exp_max,
exp_min,
mant_zero;
} float_special;
/* -> 4,4,4,4,4,4,4,4 -> 8,8,8,8 -> 16,16 -> 32
*/
localparam FADD_CLZ_STAGES = 4;
endpackage
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