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chewxy / math32

A float32 version of Go's math package

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Importing math32 for TinyGo on RP2040/arm32 missing methods for Sqrt Log and Exp

djthorpe opened this issue · comments

commented

I am importing your great float32 package for the following environment:

tinygo version 0.23.0 linux/arm (using go version go1.18.1 and LLVM version 14.0.0)
Target: Raspberry Pi Pico RP2040 (arm32)

Linking is failing as per message below.

tinygo:ld.lld: error: undefined symbol: github.com/chewxy/math32.Sqrt
tinygo:ld.lld: error: undefined symbol: github.com/chewxy/math32.Log
tinygo:ld.lld: error: undefined symbol: github.com/chewxy/math32.Exp

I think this is because some sort of architechture nuance here means it does or doesn't have the in-built architecture dependent versions. Sorry not sure of the exact flags, happy to help debug some more.

The workaround for me is to comment out missing "haveArchExp" symbol (for example):

func Exp(x float32) float32 {
	/*	if haveArchExp {
		return archExp(x)
	}*/
	return exp(x)
}
commented

Hey sorry for the long wait, not sure how this slipped my radar. I've added a fix to exclude all assembly from tinygo builds. Let me know if this solves your issue!