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hoo2
2025-06-09 22:46:39 +03:00
commit 082990ceae
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Compulsory coursework-2025-20250609/IEEE_754-2019.pdf
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Compulsory coursework-2025-20250609/fp_mult_top.sv
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//This module is given for the exercises
module fp_mult_top (
clk, rst, rnd, a, b, z, status
);
input logic [31:0] a, b; // Floating-Point numbers
input logic [2:0] rnd; // Rounding signal
output logic [31:0] z; // a ± b
output logic [7:0] status; // Status Flags
input logic clk, rst;
logic [31:0] a1, b1; // Floating-Point numbers
logic [2:0] rnd1; // Rounding signal
logic [31:0] z1; // a ± b
logic [7:0] status1; // Status Flags
fp_mult multiplier(a1,b1,rnd1,z1,status1,clk,rst);
always @(posedge clk)
if (!rst)
begin
a1 <= '0;
b1 <= '0;
rnd1 <= '0;
z <= '0;
status <= '0;
end
else
begin
a1 <= a;
b1 <= b;
rnd1 <= rnd;
z <= z1;
status <= status1;
end
endmodule
Compulsory coursework-2025-20250609/lab_coursework_2025.pdf
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Compulsory coursework-2025-20250609/multiplication.sv
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//////
// Please consider this function a black box. DO NOT try to copy any part of this function in your code.
//////
function [31:0] multiplication (string round, logic [31:0] a, logic [31:0] b);
bit [31:0] result;
// Convert every denormal in zero
if(a[30:23] == '0) a[22:0] = '0;
if(b[30:23] == '0) b[22:0] = '0;
if(a[30:23] == '1) a[22:0] = '0;
if(b[30:23] == '1) b[22:0] = '0;
// If (a is inf or NaN) or (b is inf or NaN) => Result Inf
if((a[30:23] == '1 && b[30:23] == '0) || (a[30:23] == '0 && b[30:23] == '1)) result = {1'b0, {8{1'b1}}, {23{1'b0}}};
else begin
result = $shortrealtobits($bitstoshortreal(a) * $bitstoshortreal(b));
case (round)
//IEEE_NEAR ROUNDING
"IEEE_near": begin
if(result[30:23] == '1) result[22:0] = '0;
if(result[30:23] == '0) result[22:0] = '0;
end
//IEEE_ZERO ROUNDING
"IEEE_zero": begin
//Round towards zero instead if rounded up and positive
if($bitstoshortreal(result) > ($bitstoshortreal(a) * $bitstoshortreal(b)))
begin
if($bitstoshortreal(result) > 0)
begin
result = result - 1;
end
end
//Round towards zero instead if rounded down and negative
if($bitstoshortreal(result) < ($bitstoshortreal(a) * $bitstoshortreal(b)))
begin
if($bitstoshortreal(result) < 0)
begin
result = result - 1;
end
end
if(result[30:23] == '0) result[22:0] = '0;
end
//AWAY_ZERO ROUNDING
"away_zero": begin
//Check if the result is denormal and round to minNormal
if((result[30:23] == '0 && result[22:0] != '0) || (a[30:23] != '0 && b[30:23] != '0 && result[30:23] == '0 && result[22:0] == '0)) begin
result = {result[31], {7{1'b0}}, 1'b1, {23{1'b0}}};
end
else begin
//Round away from zero instead if rounded up and negative
if($bitstoshortreal(result) > ($bitstoshortreal(a) * $bitstoshortreal(b)))
begin
if($bitstoshortreal(result) < 0)
begin
result = result + 1;
end
end
//Round away from zero instead if rounded down and positive
if($bitstoshortreal(result) < ($bitstoshortreal(a) * $bitstoshortreal(b)))
begin
if($bitstoshortreal(result) > 0)
begin
result = result + 1;
end
end
end
if(result[30:23] == '1) result[22:0] = '0;
end
//IEEE_PINF ROUNDING
"IEEE_pinf": begin
//Check if the result is denormal and round to minNormal, but only for positives
if((result[31] == 0 && result[30:23] == '0 && result[22:0] != '0) || (result[31] == 0 && a[30:23] != '0 && b[30:23] != '0 && result[30:23] == '0 && result[22:0] == '0)) begin
result = {{8{1'b0}}, 1'b1, {23{1'b0}}};
end
else begin
//Round towards positive infinity instead if rounded down and positive
if($bitstoshortreal(result) < ($bitstoshortreal(a) * $bitstoshortreal(b)))
begin
if($bitstoshortreal(result) > 0)
begin
result = result + 1;
end
end
//Round towards positive infinity instead if rounded down and negative
if($bitstoshortreal(result) < ($bitstoshortreal(a) * $bitstoshortreal(b)))
begin
if($bitstoshortreal(result) < 0)
begin
result = result - 1;
end
end
end
if(result[30:23] == '0) result[22:0] = '0;
end
//IEEE_NINF ROUNDING
"IEEE_ninf": begin
//Check if the result is denormal and round to minNormal, but only for negatives
if((result[31] == 1 && result[30:23] == '0 && result[22:0] != '0) || (result[31] == 1 && a[30:23] != '0 && b[30:23] != '0 && result[30:23] == '0 && result[22:0] == '0)) begin
result = {1'b1, {7{1'b0}}, 1'b1, {23{1'b0}}};
end
else begin
//Round towards negative infinity instead if rounded up and positive
if($bitstoshortreal(result) > ($bitstoshortreal(a) * $bitstoshortreal(b)))
begin
if($bitstoshortreal(result) > 0)
begin
result = result - 1;
end
end
//Round towards negative infinity instead if rounded up and negative
if($bitstoshortreal(result) > ($bitstoshortreal(a) * $bitstoshortreal(b)))
begin
if($bitstoshortreal(result) < 0)
begin
result = result + 1;
end
end
end
if(result[30:23] == '0) result[22:0] = '0;
end
//NEAR_UP ROUNDING
"near_up": begin
//Round towards positive infinity if rounded down, negative and in the middle
if(($bitstoshortreal(result) < ($bitstoshortreal(a) * $bitstoshortreal(b))))
begin
if(($bitstoshortreal(result) - ($bitstoshortreal(a) * $bitstoshortreal(b))) == (($bitstoshortreal(a) * $bitstoshortreal(b)) - $bitstoshortreal(result-1)))
begin
if($bitstoshortreal(result) < 0)
begin
result = result - 1;
end
end
end
//Round towards positive infinity if rounded down, positive and in the middle
if(($bitstoshortreal(result) < ($bitstoshortreal(a) * $bitstoshortreal(b))))
begin
if(($bitstoshortreal(result+1) - ($bitstoshortreal(a) * $bitstoshortreal(b))) == (($bitstoshortreal(a) * $bitstoshortreal(b)) - $bitstoshortreal(result)))
begin
if($bitstoshortreal(result) > 0)
begin
result = result + 1;
end
end
end
if(result[30:23] == '1) result[22:0] = '0;
if(result[30:23] == '0) result[22:0] = '0;
end
endcase
end
return result;
endfunction