This is my out put:
And this is the comparison results:
I don't know what's wrong with it.
Here is my HDL code:
CHIP ALU {
IN
x[16], y[16], // 16-bit inputs
zx, // zero the x input?
nx, // negate the x input?
zy, // zero the y input?
ny, // negate the y input?
f, // compute out = x + y (if 1) or x & y (if 0)
no; // negate the out output?
OUT
out[16], // 16-bit output
zr, // 1 if (out == 0), 0 otherwise
ng; // 1 if (out < 0), 0 otherwise
PARTS:
// zx
Mux16(a=x,b=false,sel=zx,out=out1);
// nx
Not16(in=out1,out=notout1);
Mux16(a=out1,b=notout1,sel=nx,out=out2);
// zy
Mux16(a=y,b=false,sel=zy,out=out3);
// ny
Not16(in=out3,out=notout3);
Mux16(a=out3,b=notout3,sel=ny,out=out4);
// f
Add16(a=out2,b=out4,out=xPlusy);
And16(a=out2,b=out4,out=xAndy);
Mux16(a=xAndy,b=xPlusy,sel=f,out=out5);
// no
Not16(in=out5,out=notout5);
Mux16(a=out5,b=notout5,sel=no,out=final);
Mux16(a=final,b=false,sel=false,out=out);
// zr
Or16Way(in=final, out=zrOut);
Not(in=zrOut, out=zr);
// zg
IsNegative(in=final,out=zg);
}
CHIP IsNegative {
IN in[16];
OUT out;
PARTS:
Or(a=in[15],b=false,out=out);
}
If you find my problem, please let me know!!!
Thanks:-)
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