Macro-Based Register Config Helper

Code

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

#define SET_ENABLE_BIT(x,y) ( (x) |= ( y ))
#define SET_MODE_FIELD(x,y) ( (x) |= (( y ) << 1 ))
#define SET_SPEED_FIELD(x,y) ( (x) |= (( y ) << 3 ))

uint16_t build_register(uint8_t enable, uint8_t mode, uint8_t speed) {
    uint16_t registerVal = 0;
    SET_ENABLE_BIT(registerVal , enable);
    SET_MODE_FIELD(registerVal, mode);
    SET_SPEED_FIELD(registerVal, speed);
    return registerVal;
}

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

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

Solving Approach