Electrical computers: arithmetic processing and calculating – Electrical digital calculating computer – Particular function performed
Reexamination Certificate
2005-11-08
2005-11-08
Chaki, Kakali (Department: 2193)
Electrical computers: arithmetic processing and calculating
Electrical digital calculating computer
Particular function performed
C708S495000
Reexamination Certificate
active
06963895
ABSTRACT:
Methods and systems are provided for fast computation of reciprocal square root for floating-point numbers. A piece-wise linear approximation of the result mantissa is computed in two cycles and used as the input to an iteration sequence that converges cubically. Three iterations produce a result with accuracy sufficient for computer graphic applications. The initial estimate and input operand are scaled to minimize final adjustments to the result mantissa and final exponent adjustments required by the algorithm are performed concurrently with any adjustment required by rounding. A pipelined implementation of the algorithm produces a result with a latency of 24 and a repeat rate of 21 clock cycles.
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Chaki Kakali
Do Chat C.
IP Strategy Group PC
Raza Microelectronics Inc.
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