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Status: Tags: Links: Arithmetic Logic Unit

ALU Functions

X Inputs

• If zx = 1, then x=0
• If nx = 1, then x=!x

Y Inputs

• If zy = 1, then y=0
• If zy = 0, then y=!y

+ or &

• If f=1, then out=x+y
• If f=0, then out=x&y

Output

• If no=1, then out=!out

Type Outputs

• If out=0 then zr=1, else zr=0 (zero)
• If out=0 then ng=1, else ng=0 (negative)

References: