OK. Then how the equivalent C code should be generated then ? Where is "foo"
array memory supposed to be allocated ?
void test()
{
float foo[36];
float* foo_ptr = &foo[4];
...
code that uses foo_ptr
...
}
Thanks.
Le lundi 14 août 2017 17:07:38 UTC+2, jj a écrit :
>
> Stack is optional. If you are targeting Wasm directly, you do not need
> to have a stack at all if your language domain does not need it. What
> Emscripten does with the stack is it blocks out a linear chunk of
> memory at startup and calls that the stack, and whenever compiled code
> does things like takes the address of a local variable, it must be
> pushed to the WebAssembly Memory out from a Wasm function local, so
> that it can be referenced by a pointer in other functions. WebAssembly
> itself does not care about Emscripten's STACKTOP etc., but all it
> operates on are the get_local and set_local type of opcodes for
> function local data.
>
> 2017-08-14 17:18 GMT+03:00 <[email protected] <javascript:>>:
> > Hi,
> >
> > We are compiling to wasm code from our Faust DSP compiler (so producing
> our
> > own wasm modules).
> >
> > In our wasm code, it is not clear yet how we could possibly define stack
> > allocated arrays. Compiling a C++ code example, I see that Emscripten
> > runtime code has some stack operations (like
> > stackSave/stackAlloc/stackRestore...) and generates stack related code
> in
> > the function header. So I understand that Emscripten runtime allocates a
> > block of memory to be used for the stack yes?, but what to do in if we
> don't
> > interact with the Emscripten runtime? Do we need to manage our own stack
> in
> > a similar way as Emscripten runtime does? Or are they any simpler
> > recommended way?
> >
> > Thanks.
> >
> > Stéphane Letz
> >
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