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Update unpackinput.sv

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Program clean up
This commit is contained in:
Harshini Srinath 2023-06-11 17:09:11 -07:00 committed by GitHub
parent 633ddb8660
commit 61b85d1c7f
1 changed files with 13 additions and 17 deletions
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30
src/fpu/unpackinput.sv
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@ -28,24 +28,24 @@
module unpackinput import cvw::*; #(parameter cvw_t P) (
input logic [P.FLEN-1:0] In, // inputs from register file
input logic En, // enable the input
input logic En, // enable the input
input logic [P.FMTBITS-1:0] Fmt, // format signal 00 - single 01 - double 11 - quad 10 - half
output logic Sgn, // sign bits of the number
output logic Sgn, // sign bits of the number
output logic [P.NE-1:0] Exp, // exponent of the number (converted to largest supported precision)
output logic [P.NF:0] Man, // mantissa of the number (converted to largest supported precision)
output logic NaN, // is the number a NaN
output logic SNaN, // is the number a signaling NaN
output logic Zero, // is the number zero
output logic Inf, // is the number infinity
output logic ExpNonZero, // is the exponent not zero
output logic FracZero, // is the fraction zero
output logic ExpMax, // does In have the maximum exponent (NaN or Inf)
output logic Subnorm, // is the number subnormal
output logic NaN, // is the number a NaN
output logic SNaN, // is the number a signaling NaN
output logic Zero, // is the number zero
output logic Inf, // is the number infinity
output logic ExpNonZero, // is the exponent not zero
output logic FracZero, // is the fraction zero
output logic ExpMax, // does In have the maximum exponent (NaN or Inf)
output logic Subnorm, // is the number subnormal
output logic [P.FLEN-1:0] PostBox // Number reboxed correctly as a NaN
);
logic [P.NF-1:0] Frac; // Fraction of XYZ
logic BadNaNBox; // incorrectly NaN Boxed
logic [P.NF-1:0] Frac; // Fraction of XYZ
logic BadNaNBox; // incorrectly NaN Boxed
if (P.FPSIZES == 1) begin // if there is only one floating point format supported
assign BadNaNBox = 0;
@ -107,7 +107,6 @@ module unpackinput import cvw::*; #(parameter cvw_t P) (
// is the exponent all 1's
assign ExpMax = Fmt ? &In[P.FLEN-2:P.NF] : &In[P.LEN1-2:P.NF1];
end else if (P.FPSIZES == 3) begin // three floating point precsions supported
// largest format | larger format | smallest format
@ -246,7 +245,6 @@ module unpackinput import cvw::*; #(parameter cvw_t P) (
2'b00: Sgn = In[P.S_LEN-1];
2'b10: Sgn = In[P.H_LEN-1];
endcase
// extract the fraction
always_comb
@ -266,7 +264,6 @@ module unpackinput import cvw::*; #(parameter cvw_t P) (
2'b10: ExpNonZero = |In[P.H_LEN-2:P.H_NF];
endcase
// example double to single conversion:
// 1023 = 0011 1111 1111
// 127 = 0000 0111 1111 (subtract this)
@ -284,8 +281,7 @@ module unpackinput import cvw::*; #(parameter cvw_t P) (
2'b00: Exp = {In[P.S_LEN-2], {P.Q_NE-P.S_NE{~In[P.S_LEN-2]}}, In[P.S_LEN-3:P.S_NF+1], In[P.S_NF]|~ExpNonZero};
2'b10: Exp = {In[P.H_LEN-2], {P.Q_NE-P.H_NE{~In[P.H_LEN-2]}}, In[P.H_LEN-3:P.H_NF+1], In[P.H_NF]|~ExpNonZero};
endcase
// is the exponent all 1's
always_comb
case (Fmt)