Multifunction adder including multistage carry chain register with conditioning means

Claim 1

AN INFORMATION HANDLING APPARATUS FOR MANIPULATING A PLURALITY OF OPERANDS EACH OF WHICH IS COMPRISED OF A PLURALITY OF MUTUALLY EXCLUSIVE INFORMATION BITS, A FIRSTLEVEL GATING CIRCUIT HAVING A PLURALITY OF INPUTS CONNECTED THERETO, SAID PLURALITY OF INPUTS CONNECTED TO SAID FIRST LEVEL GATING CIRCUIT INCLUDING SIGNALS REPRESENTATIVE OF CORRESPONDING BITS OF SAID PLURALITY OF OPERANDS, A SECOND-LEVEL GATING CIRCUIT HAVING A PLURALITY OF INPUTS CONNECTED THERETO, MEANS CONNECTING THE OUTPUT OF SAID FIRST-LEVEL GATING CIRCUIT TOGETHER WITH SAID SIGNALS REPRESENTING SAID CORRESPONDING BITS OF SAID PLURALITY OF OPERANDS AS INPUTS TO SAID SECOND-LEVEL GATING CIRCUIT, A THIRD-LEVEL GATING CIRCUIT, AND MEANS CONNECTING THE OUTPUT OF SAID FIRST AND SECOND LEVEL GATING CIRCUITS TOGETHER WITH SAID SIGNALS REPRESENTING SAID CORRESPONDING BITS OF SAID PLURALITY OF OPERANDS AS INPUTS TO SAID THIRD-LEVEL GATING CIRCUIT, SAID PLURALITY OF INPUTS CONNECTED TO SAID FIRST- AND SECONDLEVEL GATING CIRCUIT FURTHER INCLUDING A PLURALITY OF LOGICAL CONTROL SIGNALS, AND MEANS FOR SELECTIVELY ACTIVATING SAID PLURALITY OF LOGICAL CONTROL SIGNAL INPUTS TO SAID FIRST- AND SECOND-LEVEL GATING CIRCUITS TO THEREY ENABLE SAID INFORMATING HANDLING APPARATUS TO SATISFY ANY ONE OF A PLURALITY OF BOTH LOGICAL AND ARITHMETIC OPERATIONS.