Invention Grant
- Patent Title: Emulation of fused multiply-add operations
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Application No.: US14461890Application Date: 2014-08-18
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Publication No.: US09645792B2Publication Date: 2017-05-09
- Inventor: Pramod Vasant Argade , Andrew Evan Gruber , Chiente Ho , Stewart Griffin Hall , Lin Chen
- Applicant: QUALCOMM Incorporated
- Applicant Address: US CA San Diego
- Assignee: QUALCOMM Incorporated
- Current Assignee: QUALCOMM Incorporated
- Current Assignee Address: US CA San Diego
- Agency: Shumaker & Sieffert, P.A.
- Main IPC: G06F7/544
- IPC: G06F7/544 ; G06F7/483

Abstract:
At least one processor may emulate a fused multiply-add operation for a first operand, a second operand, and a third operand. The at least one processor may determine an intermediate value based at least in part on multiplying the first operand with the second operand, determine at least one of an upper intermediate value or a lower intermediate value, wherein determining the upper intermediate value comprises rounding, towards zero, the intermediate value by a specified number of bits, and wherein determining the lower intermediate value comprises subtracting the intermediate value by the upper intermediate value, determine an upper value and a lower value based at least in part on adding or subtracting the third operand to one of the upper intermediate value or the lower intermediate value, and determine an emulated fused multiply-add result by adding the upper value and the lower value.
Public/Granted literature
- US20160048374A1 EMULATION OF FUSED MULTIPLY-ADD OPERATIONS Public/Granted day:2016-02-18
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