Function create_tvmjs_wasm

python/tvm/support/emcc.py:65–142

Create wasm that is supposed to run with the tvmjs. Parameters ---------- output : str The target shared library. objects : list List of object files. options : str The additional options. cc : str, optional The compile string. libs :

(output, objects, options=None, cc="emcc", libs=None)

def create_tvmjs_wasm(output, objects, options=None, cc="emcc", libs=None):
    """Create wasm that is supposed to run with the tvmjs.

    Parameters
    ----------
    output : str
        The target shared library.

    objects : list
        List of object files.

    options : str
        The additional options.

    cc : str, optional
        The compile string.

    libs : list
        List of user-defined library files (e.g. .bc files) to add into the wasm.
    """
    cmd = [cc]
    cmd += ["-O3"]
    cmd += ["-std=c++17"]
    cmd += ["--no-entry"]
    # NOTE: asynctify conflicts with wasm-exception
    # so we temp disable exception handling for now
    #
    # We also expect user to explicitly pass in
    # -s ASYNCIFY=1 as it can increase wasm size by 2xq
    #
    # cmd += ["-s", "ASYNCIFY=1"]
    # cmd += ["-fwasm-exceptions"]
    cmd += ["-s", "WASM_BIGINT=1"]
    cmd += ["-s", "ERROR_ON_UNDEFINED_SYMBOLS=0"]
    cmd += ["-s", "STANDALONE_WASM=1"]
    cmd += ["-s", "ALLOW_MEMORY_GROWTH=1"]
    cmd += ["-s", "TOTAL_MEMORY=160MB"]

    objects = [objects] if isinstance(objects, str) else objects

    with_runtime = False
    for obj in objects:
        if obj.find("wasm_runtime.bc") != -1:
            with_runtime = True

    all_libs = []
    if not with_runtime:
        all_libs += [find_wasm_lib("wasm_runtime.bc")[0]]

    all_libs += [find_wasm_lib("tvmjs_support.bc")[0]]
    all_libs += [find_wasm_lib("webgpu_runtime.bc")[0]]

    if libs:
        if not isinstance(libs, list):
            raise ValueError("Expect `libs` to be a list of paths in string.")
        for lib in libs:
            if not Path(lib).exists():
                raise RuntimeError(