Compress Interleaved Bits Reverse Bit Spreading

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

uint8_t compress_bits(uint16_t val) {
    uint8_t res = 0;
    for(uint8_t i=0;i<8;i++)
    {
        res <<= 1;
        res |= (val & 1);
        val >>= 2;
    }
    uint8_t rev = 0;
    for(uint8_t i=0;i<8;i++)
    {
        rev <<= 1;
        rev |= (res & 1);
        res >>= 1;
    }
    return rev;
}

int main() {
    uint16_t val;
    scanf("%hu", &val);

    uint8_t result = compress_bits(val);
    printf("%u", result);
    return 0;
}