VI_CTRL
snprintb(bits, sizeof(bits), VIPER_BITS, VI_CTRL);
vic = VI_CTRL;
:: "r" (&VI_CTRL), "r" (vic) : "memory");
snprintb(bits, sizeof(bits), VIPER_BITS, VI_CTRL);
vic = VI_CTRL;
:: "r" (&VI_CTRL), "r" (vic) : "memory");