fxamacker / w2c2

Translates WebAssembly modules to C

w2c2

Translates WebAssembly modules to C. Inspired by wabt's wasm2c.

Features

• Implements the WebAssembly Core Specification 1.0
• Passes 99.9% of the WebAssembly core semantics test suite
• Written in C89 and generates C89
• Support for older operating systems and architectures
• Support for big-endian systems
• Streaming compilation, low memory usage

Performance

• Coremark 1.0: ~7% slower than native

Usage

make release
./w2c2 <module.wasm> > <module.c>

Examples

Coremark:

cd examples/coremark
./coremark

Testing

Requires Python 3 and wabt (for wast2json).

cd tests
make gen
make run-tests