DIVIDIERSCHALTUNG FüR GLEITKOMMAZAHLEN

摘要

A floating-point dividing circuit for dividing floating-point data by a nonrecovery dividing method. The circuit has a circuit part (83) which pre-processes a dividend (N) and a divisor (D) before dividing and determines a division type, an exponent operating part (91), a mantissa dividing part (100), a quotient generating circuit part (93, 94, 101, 103-105), and at least one of an exception and non-operation detecting part (92) and a control part (90). The exception and non-operation detecting part (92) generates a stop signal (DSTOP#X) upon detecting a non-operation pattern, and stops the repeated operation of the mantissa dividing part (100). The control part (90) generates at least one of a non-execution signal (DRUN) and a control signal (DCNT0-15#X), and stops latch operations of registers, during the non-execution of a division instruction.