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
    int val = (reg >> 10) & 0x1F;       /* reg right shifted to 10 times
                                           mask with 0x1F. */
    if(val < 31)                        // checking val less than 31 or not
    val++;                              // increment the val
    
reg = reg & ~(0x1F << 10);              // clear the 5 bits

reg |= ((val & 0x1F) << 10);            // replacing the 5 bits in reg

return reg;

}

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

Solving Approach

uint32_t update_register(uint32_t reg) {

    // Your logic here

    int val = (reg >> 10) & 0x1F;       /* reg right shifted to 10 times

                                           mask with 0x1F. */

    if(val < 31)                        // checking val less than 31 or not

    val++;                              // increment the val

reg = reg & ~(0x1F << 10);              // clear the 5 bits

reg |= ((val & 0x1F) << 10);            // replacing the 5 bits in reg

return reg;

}