Gets fib(30) from 380ms to 340ms.
(cherry picked from commit a58704296cd36d3080dbf8f1be49300de2c25ea9;
amended to comment out two dbgln_if()s that no longer compile after
this change if WASM_TRACE_DEBUG is defined to 1 -- see comments on
LadybirdBrowser/ladybird#960. Likewise, one dbgln_if() in Wasi.cpp
got commented out as well)
Instead of one stack to hold frames, labels, and values, there is now
three separate stacks. This speeds up fib(30) from 580ms to 480ms.
(cherry picked from commit a3b077c6415e0f4038b8c8da1e1e9c9cc2df5f0a)
`Module::functions` created clones of all of the functions in the
module. It provided a _slightly_ better API, but ended up costing around
40ms when instantiating spidermonkey.
(cherry picked from commit dc52998341bb86ad8fb790fb72f943e43b16e8e5)
This should make debugging and profiling much better, at little to no
runtime cost.
Also moves off the operator definitions to a separate header, so it
should also improve the editing experience quite a bit.
This commit is a fairly large refactor, mainly because it unified the
two different ways that existed to represent references.
Now Reference values are also a kind of value.
It also implements a printer for values/references instead of copying
the implementation everywhere.
This allows multiply different kinds of interpreters to be used by the
runtime; currently a BytecodeInterpreter and a
DebuggerBytecodeInterpreter is provided.
This should make it easier to implement multiple types of interpreters
on top of a configuration, and also give a small speed boost in not
initialising as many Stack objects.
Doing that was causing a lot of malloc/free traffic, but since there's
no need to have a stable pointer to them, we can just store them by
value.
This makes execution significantly faster :^)
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. :^)
