Julian Thomas

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10 years, 2 months ago.

How can I make use of the FPU?

I see that the LPC4088 has an on board FPU, how can I make sure my code is using this extra power?

Question relating to:

Last updated: 23 Apr 2019
The mbed-enabled LPC4088 QuickStart Board from Embedded Artists is a easy to use ARM Cortex-M4 rapid prototyping board in a standard through hole DIP package (44-pin), targeted at high-performance as …

2 Answers

Martin Kojtal
10 years, 2 months ago.

Hello,

if you are using online compiler, target LPC4088 has set FPU, you can check it on github,

https://github.com/mbedmicro/mbed/blob/master/workspace_tools/targets.py#L177

which then translates into cpu type - Cortex-M4.fp.

Regards,
0xc0170

Dan D.
10 years, 2 months ago.

Along the same theme, what considerations should be made to make sure its being used optimally? For example, the FPU only works on single precision floats, right? So I assume that means i must avoid using double precision floats because that would resort back to software computation.

Are there any other "rules" to keep in mind?

Thanks