Pack Multiple Fields into a 16-bit Control Register

Code

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

uint16_t pack_register(uint8_t mode, uint8_t speed, uint8_t status)
{
    uint16_t result = 0u;

    if (mode > 7) mode = 7;         // 3 bits max
    if (speed > 31) speed = 31;     // 5 bits max
    if (status > 63) status = 63;   // 6 bits max

    result = (mode << 0) | (speed << 3) | (status << 10);

    return result;
    
}

int main() {
    uint8_t mode, speed, status;
    scanf("%hhu %hhu %hhu", &mode, &speed, &status);

    uint16_t reg = pack_register(mode, speed, status);
    printf("%u", reg);
    return 0;
}

Solving Approach