US 12,217,020 B2
Small multiplier after initial approximation for operations with increasing precision
Leonard Rarick, San Diego, CA (US)
Assigned to Imagination Technologies Limited, Kings Langley (GB)
Filed by Imagination Technologies Limited, Kings Langley (GB)
Filed on Dec. 26, 2023, as Appl. No. 18/395,836.
Application 17/209,809 is a division of application No. 14/516,643, filed on Oct. 17, 2014, granted, now 10,983,756, issued on Apr. 20, 2021.
Application 18/395,836 is a continuation of application No. 18/097,316, filed on Jan. 16, 2023, granted, now 11,853,718, issued on Dec. 26, 2023.
Application 18/097,316 is a continuation of application No. 17/209,809, filed on Mar. 23, 2021, granted, now 11,579,844, issued on Feb. 14, 2023.
Prior Publication US 2024/0241695 A1, Jul. 18, 2024
This patent is subject to a terminal disclaimer.
Int. Cl. G06F 7/552 (2006.01); G06F 7/523 (2006.01); G06F 7/537 (2006.01)
CPC G06F 7/552 (2013.01) [G06F 7/523 (2013.01); G06F 7/537 (2013.01); G06F 7/5525 (2013.01); G06F 2207/5351 (2013.01)] 18 Claims
OG exemplary drawing
 
1. An apparatus for performing an iterative arithmetic operation on an input value to obtain an output value that is used to execute an instruction requesting an arithmetic operation on an operand by said input value, comprising:
initial approximation circuitry configured to provide, based on at least a portion of said input value, an initial approximation of said output value;
limited precision multiplier circuitry configured to obtain a first multiplication result of a first iteration;
full-precision multiplier circuitry configured to obtain a second multiplication result of the first iteration; and
an output configured to output said output value.