This commit is a bit of a mixed bag, but most of the changes are
repetitive enough to just include in a single commit.
The following instructions remain unimplemented:
- br.table
- table.init
- table.get
- table.set
- table.copy
- table.size
- table.grow
- table.fill
- ref.null
- ref.func
- ref.is_null
- drop
- i32/i64.clz
- i32/i64.ctz
- i32/i64.popcnt
- i32/i64.rotl
- i32/i64.rotr
- X.trunc.Y
- X.trunc_sat.Y
- memory.size
- memory.grow
- memory.init
- memory.copy
- memory.fill
- elem.drop
- data.drop
As the parser now flattens out the instructions and inserts synthetic
nesting/structured instructions where needed, we can treat the whole
thing as a simple parsed bytecode stream.
This currently knows how to execute the following instructions:
- unreachable
- nop
- local.get
- local.set
- {i,f}{32,64}.const
- block
- loop
- if/else
- branch / branch_if
- i32_add
- i32_and/or/xor
- i32_ne
This also extends the 'wasm' utility to optionally execute the first
function in the module with optionally user-supplied arguments.
This adds very basic support for module instantiation/allocation, as
well as a stub for an interpreter (and executions APIs).
The 'wasm' utility is further expanded to instantiate, and attempt
executing the first non-imported function in the module.
Note that as the execution is a stub, the expected result is a zero.
Regardless, this will allow future commits to implement the JS
WebAssembly API. :^)
