System and method for a floating point unit with feedback...

Electrical computers: arithmetic processing and calculating – Electrical digital calculating computer – Particular function performed

Reexamination Certificate

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C708S205000, C708S508000

Reexamination Certificate

active

07730117

ABSTRACT:
A system for performing floating point arithmetic operations including an input register adapted for receiving an operand. The system also includes a mechanism for performing a shift or masking operation in response to determining that the operand is in an un-normalized format. The system also includes instructions for performing single precision incrementing of the operand in response to determining that the operand is single precision, that the operand requires the incrementing based on the results of a previous operation and that the previous operation did not perform the incrementing. The operand was created in the previous operation. The system further includes instructions for performing double precision incrementing of the operand in response to determining that the operand is double precision, that the operand requires the incrementing based on the results of the previous operation and that the previous operation did not perform the incrementing.

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Montoye et al., “Design of the IBM RISC System/6000 Floating-Point Execution Unit,” IBM Journal of R&D, vol. 34, No. 1, pp. 59-70, Jan. 1990.

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