stdc_bit_width_ui
return (1U << (stdc_bit_width_ui(ui) - 1));
return (2U << (stdc_bit_width_ui(ui - 1) - 1));
.so_ui = stdc_bit_width_ui,
extern unsigned int stdc_bit_width_ui(unsigned int) _C23_UNSEQ_ATTR;
char(*)[4]: stdc_bit_width_ui(val), \