Pack Multiple Fields into a 16-bit Control Register

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

#define MODE(x,y)(x|=(y|((x>>0)&0x00)))
#define SPEED(x,y)(x|=((y|(x>>3))<<3))
#define STATUS(x,y)(x|=((y|(x>>10))<<10))

uint16_t pack_register(uint8_t mode, uint8_t speed, uint8_t status) {
    // Your logic here
    uint16_t result=0;
    result = MODE(result,mode);
    result = SPEED(result,speed);
    result = STATUS(result,status);
    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;
}