Method emit_wasm_store

winch/codegen/src/codegen/mod.rs:1393–1416

Emit a WebAssembly store.

(&mut self, arg: &MemArg, kind: StoreKind)

    /// Emit a WebAssembly store.
    pub fn emit_wasm_store(&mut self, arg: &MemArg, kind: StoreKind) -> Result<()> {
        let memory_index = MemoryIndex::from_u32(arg.memory);
        let heap = self.env.resolve_heap(memory_index);
        let src = self.context.pop_to_reg(self.masm, None)?;

        let maybe_addr = match kind {
            StoreKind::Atomic(size) => {
                self.emit_compute_heap_address_align_checked(&heap, &arg, size)?
            }
            StoreKind::Operand(size) | StoreKind::VectorLane(LaneSelector { size, .. }) => {
                self.emit_compute_heap_address(&heap, &arg, size)?
            }
        };

        if let Some(addr) = maybe_addr {
            self.masm
                .wasm_store(src.reg, self.masm.address_at_reg(addr, 0)?, kind)?;

            self.context.free_reg(addr);
        }
        self.context.free_reg(src);

        Ok(())
    }

    /// Loads the address of the table element at a given index. Returns the
    /// address of the table element using the provided register as base.