Normalization control system for floating point arithmetic opera

Details Normalization control system for floating point arithmetic opera Normalization control system for floating point arithmetic opera

1989-05-25

1991-02-05

Harkcom, Gary V.

Boots, shoes, and leggings

G06F 1500

Patent

active

049911309

ABSTRACT:
A microprogram controlled microprocessor capable of normalizing a given data in a floating point representation includes a memory storing a microprogram, an address register for holding a microprogram start address, an operand register for holding a source operand, a temporary register for temporarily holding an operation data, a pointer for holding a code indicative of the operand register at the time of starting the microprogram and for indicating a transfer source register in a transfer operation between internal registers, and a discriminator for discriminating whether or not an input source operand is a normalized number. The microprocessor operates on the basis of the microprogram to execute a given operation to the input source operand while causing the discriminator to discriminate whether or not the input source operand is a normalized number, so that the microprogram is completed without a branch when the input source operand is a normalized number. On the other hand, when the input source operand is an unnormalized number, the microprocessor operates to branch to a normalizing program and to cause a normalized operand to be held in the temporary register and a code indicative of the temporary register to be set to the pointer. In addition, the microprocessor operates to re-execute the microprogram from the address designated by the address register.

REFERENCES:
patent: 4412283 (1983-10-01), Mor et al.
patent: 4573118 (1986-02-01), Damouny et al.
patent: 4713750 (1987-12-01), Damouny et al.
patent: 4773035 (1988-09-01), Lee et al.

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