Parallella Community

My integer version was also bad, but I get why now. The stuff I'm doing relies heavily on power of 2 integers, which compile down to a simple shift. But when I define the stuff as a function, and it's not inlined, the compiler has no way of knowing it'll be a power of 2 - So it applies the (apparently) expensive generic division.

That makes sense for integers, but doesn't the epiphany have some way to divide floats? Or is there only multiply?

That works for constants, but what about "a / b"? =)

cib,

We see big boost in '/' performance when using the "-ffast-math" is switch.

There are also some fast integer and floating point divisions examples here, can't recall which ones of them are in use within the compiler as of 4.8?

https://github.com/adapteva/epiphany-gc ... fast_div.S
https://github.com/adapteva/epiphany-gc ... y/divsi3.S

Andreas