Initial Subzero WASM prototype.

README-wasm.md

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+# Wasm Prototype Experiment Notes
+
+Here's the command I use to test:
+
+```
+LD_LIBRARY_PATH=~/nacl/v8/out/native/lib.target make -j48 -f Makefile.standalone WASM=1 && LD_LIBRARY_PATH=~/nacl/v8/out/native/lib.target ./pnacl-sz -O2 -filetype=asm -target=arm32 ./torture-s2wasm-sexpr-wasm/20000112-1.c.s.wast.wasm
+```
+You'll probably need to adjust your `LD_LIBRARY_PATH` to point to where your v8
+libraries are.
+
+You'll need to build v8 as a shared library. Build it like this:
+
+```
+make -j48 native component=shared_library
+```
+
+`wasm-run-torture-tests.py` can be used to run all the tests, or some
+subset. Running a subset will enable verbose output. You can download the
+torture tests from the [WebAssembly waterfall](https://wasm-stat.us/console).