Shifter circuit for multiple precision division

Details Shifter circuit for multiple precision division Shifter circuit for multiple precision division

1992-08-31

1994-04-05

Malzahn, David H.

Boots, shoes, and leggings

364766, 364745, G06F 752

Patent

active

053011392

ABSTRACT:
A single, double and extended precision shifter circuit for a hardware floating point divide circuit is disclosed. The divide circuit implements the divide function by receiving two floating point numbers (X and Y) from a main processor, generating the quotient of X/Y using radix 4 SRT nonrestoring division steps, and then delivering the quotient to the main processor. The divide circuit is comprised of a control circuit, a quotient prediction circuit, a partial remainder generator circuit and a quotient generator circuit. The precision shifter circuit operates during the nonrestoring division steps to steer the next negative and positive quotient values generated by the quotient prediction circuit into the proper place within respective negative and positive quotient registers of the quotient generation circuit. The steering is performed according to the precision specified for the divide operation.

REFERENCES:
patent: 4272827 (1981-06-01), Inui et al.
patent: 4939686 (1990-07-01), Fandrianto
patent: 4979142 (1990-12-01), Allen et al.
patent: 5128891 (1992-07-01), Lynch et al.

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