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module top;
function automatic [31:0] operation1;
input [4:0] rounds;
input integer num;
integer i;
begin
begin : shadow
integer rounds;
rounds = 0;
end
for (i = 0; i < rounds; i = i + 1)
num = num * 2;
operation1 = num;
end
endfunction
function automatic [31:0] pass_through;
input [31:0] inp;
pass_through = inp;
endfunction
function automatic [31:0] operation2;
input [4:0] var;
input integer num;
begin
var[0] = var[0] ^ 1;
operation2 = num * var;
end
endfunction
function automatic [31:0] operation3;
input [4:0] rounds;
input integer num;
reg [4:0] rounds;
integer i;
begin
begin : shadow
integer rounds;
rounds = 0;
end
for (i = 0; i < rounds; i = i + 1)
num = num * 2;
operation3 = num;
end
endfunction
wire [31:0] a;
assign a = 2;
parameter A = 3;
wire [31:0] x1;
assign x1 = operation1(A, a);
wire [31:0] x1b;
assign x1b = operation1(pass_through(A), a);
wire [31:0] x2;
assign x2 = operation2(A, a);
wire [31:0] x3;
assign x3 = operation3(A, a);
// `define VERIFY
`ifdef VERIFY
assert property (a == 2);
assert property (A == 3);
assert property (x1 == 16);
assert property (x1b == 16);
assert property (x2 == 4);
assert property (x3 == 16);
`endif
endmodule
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