Switch SP and memory offset to uint32

[codefromthecrypt]

There are some confusing code in the source wasm_exec.js which is about forcing unsigned numbers. The memory offset and stack pointer should both be uint32 not int32 where possible.

This is the correct way to force unsigned in go. The javascript does it via sp >>>= 0; which can be wholesale removed here as it has no effect, regardless of if the variable types are changed.

golang/go@9848e93

[prep]

Yes, fair point. I set out to mimic as much of the original wasm_exec.js as possible to get things working quickly and spot deviations more easily. Now that things are starting to work, I'll sort things like this out 👍

[codefromthecrypt]

sounds good. PS I'm starting a reference doc here and will continue tomorrow https://github.com/tetratelabs/wazero/pull/621/files just in case the notes help

[prep]

Very nice! I've pushed some changes including the change to uint32 for offset and length.

[codefromthecrypt]

thanks!