Project is broken

[abitrolly]

Compiling this project with the latest version of Emscripten SDK which is just 3 days old from incoming fails. See PR #36 for details and description of the problem in asm.js from upstream.

   Unsupported:   %12 = tail call i128 @llvm.bswap.i128(i128 %11) #5
   LLVM ERROR: Instruction not yet supported for integer types larger than 64 bits

https://travis-ci.org/ethereumjs/rustbn.js/jobs/492925664#L631

[axic]

Last it was compiled with rust 1.27.2 and then-recent emscripten: https://github.com/ethereumjs/rustbn.js/tree/master/lib

Apart from running rustfmt, we haven't changed anything since.

@hugo-dc do you happen to remember what version of emscripten did you use?

[hugo-dc]

@axic I'm using 1.38.21

[axic]

Is it still compiling with 1.38.21?

[hugo-dc]

Yes, I've just compiled it using that version and Rust 1.27.2

[axic]

@abitrolly what rustc/emscripten are you building with?

[abitrolly]

@axic

rustc 1.32.0 (9fda7c223 2019-01-16)

https://travis-ci.org/ethereumjs/rustbn.js/jobs/492925664#L188

Emscripten 1.38.27
https://travis-ci.org/ethereumjs/rustbn.js/jobs/492925664#L273

[abitrolly]

Fails with Rust 1.27.2 and Emscripten 1.38.21

https://travis-ci.org/ethereumjs/rustbn.js/jobs/493657514#L693-L694

[axic]

See https://github.com/ethereumjs/rustbn.js/pull/36/files#r257229082.