Function getScratchRegister

src/e9tool/e9metadata.cpp:558–561

* Given some sratch space, return the corresponding register. */

 * Given some sratch space, return the corresponding register.
 */
static Register getScratchRegister(int slot)
{
    return (slot < 0 || slot > RMAX_IDX? REGISTER_INVALID: getReg(slot));
}

/*
 * Send instructions that ensure the given register is saved.