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

union __attribute__((__packed__)) XMM_u {
    int8_t a8[16];
    int16_t a16[8];
    int32_t a32[4];
    int64_t a64[2];
    __int128_t a128;
    uint8_t u8[16];
    uint16_t u16[8];
    uint32_t u32[4];
    uint64_t u64[2];
    __uint128_t u128;
    double fa64[2];
    float fa32[4];
};
typedef union XMM_u XMM;


int main() {
    XMM tmp;
    uint32_t ux = 0x10000000;
    tmp.u32[0] = ux;
    
    float f;
    f = tmp.fa32[0];
    
    printf("float = %e\n", f);

    double df;

    df = tmp.fa64[0];

    printf("double = %e\n", df);



    XMM tmp1;

    tmp1.fa32[0] = f;
    uint32_t cx; 
    cx = tmp1.u32[0];

    printf("float to HEX = %x\n", cx);

    tmp1.fa64[0] = df;

    uint64_t cdx;
    cdx = tmp1.u64[0];

    printf("double to HEX = %llx\n", cdx);

    return 0;
}