constish_time_non_zero
mask = constish_time_non_zero(bit0(b)); \
mask = constish_time_non_zero(value >> 15);
mask = constish_time_non_zero(value >> 15);
mask = constish_time_non_zero(value >> 15);
mask = constish_time_non_zero(value >> 15);
mask = constish_time_non_zero(value >> 15);
mask = constish_time_non_zero(value >> 15);
uint16_t mask = constish_time_non_zero(subtracted >> 15);