Extract and Modify Field in a 32-bit Register

Code

#include <stdio.h>
#include <stdint.h>
//1111 1111 1111 1111    1111 11   11 1111 1111
uint32_t update_register(uint32_t reg) {
    // Your logic here
    uint32_t mask = (0x1F<<10);
    uint32_t field = (reg>>10)&0x1F;
    if(field<31) field++;
    reg&=~mask;
    reg|=(field<<10)&mask;
    return reg;
}

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

Solving Approach

 

 

 

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Input

15360

Expected Output

16384