Date: Thu, 24 Apr 2025 15:19:42 -0700
On Thursday, 24 April 2025 13:43:30 Pacific Daylight Time Tiago Freire via Std-
Proposals wrote:
> A fused multiply add has been considered as well as a fused multiply double
> add (adds 2 numbers to the multiplication result instead of just one).
> While they make sense from a computer science perspective, hardware support
> for those operations is lacking.
I've never seen a fused-multiply-double-add. I have seen fused-double-
mutliply-then-add - that's dot product instructions.
Proposals wrote:
> A fused multiply add has been considered as well as a fused multiply double
> add (adds 2 numbers to the multiplication result instead of just one).
> While they make sense from a computer science perspective, hardware support
> for those operations is lacking.
I've never seen a fused-multiply-double-add. I have seen fused-double-
mutliply-then-add - that's dot product instructions.
-- Thiago Macieira - thiago (AT) macieira.info - thiago (AT) kde.org Principal Engineer - Intel DCAI Platform & System Engineering
Received on 2025-04-24 22:19:46