Boots – shoes – and leggings
Patent
1987-03-27
1988-10-18
Malzahn, David H.
Boots, shoes, and leggings
364745, G06F 748
Patent
active
047792205
ABSTRACT:
A floating-point data rounding and normalizing circuit comprises a shift controller receiving a fraction portion of an input floating-point data for generating a shift control signal indicative of a shift amount required for normalization. A barrel shifter receives the fraction portion of the input floating-point data and is controlled by the shift control signal to shift the fraction portion by the required amount. A round circuit receives the shifted fraction portion for rounding it, and if an overflow occurs in the rounding operation by the rounding circuit, it is detected by a detector. A rounded fraction is inputted to another shifter controlled by the overflow detector so as to shift back the rounded fraction output one bit in response to generation of the overflow. Further, an encoder are provided to generate a two's complement of a binary number indicating the above mentioned required shift amount, and an addition circuit receiving an exponent portion of the input floating-point data, the two's complement and an output of the overflow detecting means for generating a normalized exponent data.
REFERENCES:
patent: 4295203 (1981-10-01), Joyce
patent: 4429370 (1984-01-01), Blau et al.
patent: 4468748 (1984-08-01), Blau et al.
patent: 4562553 (1985-12-01), Mattedi et al.
patent: 4592006 (1986-05-01), Hagiwara et al.
Malzahn David H.
NEC Corporation
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