G - Physics – 06 – F
Patent
G - Physics
06
F
354/127, 354/197
G06F 7/50 (2006.01) G06F 5/01 (2006.01)
Patent
CA 2006704
Abstract of the Disclosure In a total sum calculation circuit for the use in calculating a total sum of first through n-th input data which are represented by a floating point representation and which are composed of first through n-th exponent parts and first through n-th fraction parts, where n is an integer greater than two, an n-input data comparison circuit simultaneously compares the first through the n-th exponent parts with one another to produce a maximum one of the first through the n-th exponent parts and a comparison result signal representative of which one of the first through the n-th exponent parts is the maximum exponent part. Supplied with the first through the n-th exponent parts and the comparison result signal, a shift number calculation circuit calculates first through n-th shift digit numbers between the maximum exponent part and the first through the n-th exponent parts. The first through the n-th fraction parts are shifted by first through n-th shift digit numbers in first through n-th shifters are produced as first through n-th shifted fraction parts which are summed up into an unnormalized fraction part. The unnormalized fraction part is normalized into a total sum fraction part by the use of normalization information derived from the unnormalized fraction part. The maximum exponent part is also normalized by the (Abstract of the Disclosure continued) normalization information into a total sum exponent part. A combination of the total sum exponent part and the total sum fraction part is produced as the total sum represented by the floating point representation.
Corporation Nec
Smart & Biggar
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