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module top;
reg [7:0] a,b;
reg [4:0] c,d;
reg [10*8-1:0] x,y;
integer i;
initial
begin
a = 8'h42;
{c,d} = a;
$display("c=%h d=%h",c,d);
b[7:4] = 4'h6;
b[3:0] = 4'h8;
$display("b=%h",b);
{a[3:0],a[7:4]} = a & 8'hff;
$display("a=%h",a);
x = "ABCDEFGHIJ";
$display("x=%s x=%h",x,x);
for (i = 0;i < 10;i = i+1)
$display("x[%d:%d]=%s",8*i+7,8*i,x[8*i +: 8]);
for (i = 0;i < 10;i = i+1)
x[8*i +: 8] = (i+1)*(i+1);
$display("x=%h",x);
for (i = 0;i < 10;i = i+1)
begin
y[8*i +: 8] = x[8*(9-i) +: 8];
end
$display("y=%020h",y);
//
// i should be read only on entering the loop so updates to i in
// the body should not affect the number of iterations.
//
i = 5;
repeat (i)
begin
i = 2*(i - 1);
$display("hello i = %d",i);
end
$display("done hello");
end
endmodule
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