Endianness issue in bswap_m256

[lrettig]

Logging this to track the conversation yesterday in gitter:

@axic Mar 21 18:38 very likely evm2was has endianess issues
@hugo-dc Mar 21 18:52 i’ve just confirmed storage is the problem, fill the tests expecting "0x" : “0x0200000000000000000000000000000000000000000000000000000000000000” in storage, and the test case pass
@jwasinger Mar 21 19:19 I have the fix. the endianness is being flipped by bswap_m256 : ;; generated by ./wasm/generateInterface.js\n(func $SSTORE (call $storageStore(call $bswap_m256 (get_global $sp))(call $bswap_m256 (i32.add (get_global $sp) (i32.const -32)))))

[lrettig]

@jwasinger are we sure all the endianness issues are fixed already?

[jwasinger]

No, this was auto-closed by #202 which was merged 'as-is' (without fully fixing this issue)