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 = 0;
    mask |= (((1<<5) - 1) << 10);
    uint32_t extracted = ((reg & mask)>>10);
    if(extracted < 31){
        extracted += 1;
    }
    reg &= ~(((1U << 5)-1) <<10);
    reg |= (extracted << 10);
    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