Electrical computers: arithmetic processing and calculating – Electrical digital calculating computer – Particular function performed
Reexamination Certificate
2005-01-11
2005-01-11
Chaki, Kakali (Department: 2124)
Electrical computers: arithmetic processing and calculating
Electrical digital calculating computer
Particular function performed
C708S495000
Reexamination Certificate
active
06842765
ABSTRACT:
A processor for performing a multiply-add instruction on a multiplicand A, a multiplier B, and an addend C, to calculate a result D. The operands are double-precision floating point numbers and the result D is a canonical-form extended-precision floating point number having a high order component and a low order component. The processor is a fused multiply-add processor with a multiplier, an adder, a normalizer and a rounder. The post-adder data path, the normalizer and the rounder each have a data width sufficient to represent post-adder intermediate results to permit the high and low order words of a correctly-rounded result D to be computed. The mantissas of the extended-precision result D are provided such that the high order word mantissa is stored to double precision registers.
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Enenkel Robert F.
Fleischer Bruce M.
Gustavson Fred G.
Moreira Jose E.
Chaki Kakali
Do Chat C.
Mims Jr. David A.
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