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= 0x1f << 10; //mask of 5bits of 1 to left of 10 position
    uint32_t result = (reg & mask) >> 10; //extract the field


    if(result < 31)
    {
        result+=1;
    }

    reg &= ~mask; //clear the old field bits using mask 

    reg |= (result <<10); //set the result bits in the register
    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