Extract and Modify Field in a 32-bit Register

Code

#include <stdio.h>
#include <stdint.h>

uint32_t update_register(uint32_t reg) {
    uint32_t mask = ((1U << 5) - 1U) << 10;  // bits [14:10]
    uint32_t field = (reg & mask) >> 10;
    if (field < 31) field++;
    return (field << 10) | (~mask & reg);
}


int main() {
    uint32_t reg;
    scanf("%u", &reg);
    uint32_t updated = update_register(reg);
    printf("%u", updated);
    return 0;
}

Solving Approach