Extract and Modify Field in a 32-bit Register

Code

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

uint32_t update_register(uint32_t reg) {
    // Your logic here
    uint32_t mask = 0x7C00;
    uint32_t field = (reg & mask)>>10;
    if(field<31)
        field++;
    reg &= ~mask;
    reg |= (field << 10);
    return reg;
}

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

Solving Approach

1. create mask for the target field

2. extract the target field
3. modify the field (apply the required logic)
4. update the register