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I took a brief glance at the LPC1830 and it seems it doesn't have hardware floating-point at all. (None of the mainstream Cortex M3 products that I've seen do)

by diydsp 13y ago

I took a brief glance at the LPC1830 and it seems it doesn't have hardware floating-point at all. (None of the mainstream Cortex M3 products that I've seen do). Do you have better info on this? So, I believe its FP support is through software and could be written to be double or greater precision. If this is true and if JS can only do floats, it would be bad news for many basic mathematical operations running on this chip. But hey, as someone pointed out above: People don't want performance. They want libraries. But with no FPU, count me out. I'd rather have my stm32f4. Just sayin'.

thedufer 13y ago
> If this is true and if JS can only do floats, it would be bad news for many basic mathematical operations running on this chip By spec, JS only has double-precision floats. However, since that means that 32-bit integers can be exactly represented, V8 optimizes to integer calculations unless actually using floats becomes necessary. I would guess that on this device floating point operations are done in software, but also that they rarely occur in practice.