Electrical computers: arithmetic processing and calculating – Electrical digital calculating computer – Particular function performed
Reexamination Certificate
2011-03-22
2011-03-22
Malzahn, David H (Department: 2193)
Electrical computers: arithmetic processing and calculating
Electrical digital calculating computer
Particular function performed
Reexamination Certificate
active
07912888
ABSTRACT:
A computing device has a rounding processor that inputs therein a set of plural (K) input data IN1through INK comprising z bits. The rounding processor selects an ensured bit field depending upon the state of usage of each of specific areas A of upper z/2 bits of the 32-bit input data IN1through INK and rounds the corresponding input data to z/2. As a result of rounding processing, shift information SHIFT of lower (16−n) bits of each discarded non-specific area B is stored in a memory area. D10-1through D10-K of the rounded respective 16 bits are subjected to multiplication by a multiplier. A digit adjuster shifts multiplication results to the left on the basis of the shift information SHIFT respectively stored in the memory areas to adjust digits.
REFERENCES:
patent: 5644522 (1997-07-01), Moyse et al.
patent: 6233672 (2001-05-01), Lynch
patent: 6360204 (2002-03-01), Li et al.
patent: 2001/0023425 (2001-09-01), Oberman et al.
Malzahn David H
Oki Semiconductor Co., Ltd.
Studebaker Donald R.
Studebaker & Brackett PC
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