| 摘要 |
PROBLEM TO BE SOLVED: To provide a relatively simple zero result predicting mechanism for detecting a zero result without performing any completely arithmetic operation to the number of inputs for largely increasing processing speeds of the various arithmetic operations. SOLUTION: In order to detect the zero result of the sum of a first operand A, a second operand B, and a carry bit Cin, A (bar) and A (bar)+1 are calculated, and then one of them is compared with the second operand B dependently of the carry bit Cin (Cin=0, A (bar); Cin=1, A (bar)+1) in this zero result detector. |
