Normalizing circuit of floating-point arithmetic circuit for two

Details Normalizing circuit of floating-point arithmetic circuit for two Normalizing circuit of floating-point arithmetic circuit for two

1990-07-13

1991-12-24

Harkcom, Gary V.

Boots, shoes, and leggings

G06F 738

Patent

active

050758829

ABSTRACT:
A post-normalizing unit for use in a floating-point arithmetic circuit having a pre-normalizing unit for carrying out a pre-normalization operation on first and second exponent parts and first and second fraction parts to produce a maximum exponent part and first and second pre-normalized fraction parts, an arithmetic unit for carrying out an arithmetic operation on the first and the second pre-normalized fraction parts to produce an operated fraction part, and first and second shift count calculating circuits calculate first and second shift counts for use in normalizing the operated fraction part with an input cardinal number regarded as first and second cardinal numbers, respectively. Supplied with the operated fraction part, first and second shifters left-shift the operated fraction part on the basis of the first and the second shift counts to produce first and second shifted fraction parts, respectively. Supplied with the maximum exponent part, first and second exponent adjusting circuits adjust the maximum exponent part by using the first and the second shift counts to produce first and second adjusted exponent parts, respectively. A result selector selects one of the first and the second shifted fraction parts as a post-normalized fraction part. An exponent adjustment selector selects one of the first and the second adjusted exponent part as a post-normalized exponent part.

REFERENCES:
patent: 4758974 (1988-07-01), Fields et al.
patent: 4905178 (1990-02-01), Mor et al.
patent: 4926369 (1991-05-01), Hokenek et al.

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