Method emit_table_set

winch/codegen/src/codegen/mod.rs:664–694

Emit the `table.set` operation for a function-reference table. Expects the value stack to contain `[index, value]` (with `value` on top) and consumes both.

(&mut self, table_index: TableIndex)

    /// Expects the value stack to contain `[index, value]` (with `value` on
    /// top) and consumes both.
    pub fn emit_table_set(&mut self, table_index: TableIndex) -> Result<()> {
        let table = self.env.table(table_index);
        ensure!(
            table.ref_type.heap_type == WasmHeapType::Func,
            CodeGenError::unsupported_wasm_type()
        );
        ensure!(
            self.tunables.table_lazy_init,
            CodeGenError::unsupported_table_eager_init()
        );
        let ptr_type = self.env.ptr_type();
        let table_data = self.env.resolve_table_data(table_index);
        let value = self.context.pop_to_reg(self.masm, None)?;
        let index = self.context.pop_to_reg(self.masm, None)?;
        let base = self.context.any_gpr(self.masm)?;
        let elem_addr = self.emit_compute_table_elem_addr(index.into(), base, &table_data)?;
        // Set the initialized bit.
        self.masm.or(
            writable!(value.into()),
            value.into(),
            RegImm::i64(FUNCREF_INIT_BIT as i64),
            ptr_type.try_into()?,
        )?;

        self.masm.store_ptr(value.into(), elem_addr)?;

        self.context.free_reg(value);
        self.context.free_reg(index);
        self.context.free_reg(base);
        Ok(())
    }

    /// Emit the `table.grow` operation.
    pub fn emit_table_grow(&mut self, table_index: TableIndex) -> Result<()> {