swap.c

void swap_xor(int *x, int *y)
{
    *x = *x ^ *y;
    *y = *x ^ *y;
    *x = *x ^ *y;
}

void swap_normal(int *x, int *y)
{
    int temp = *x;
    *x = *y;
    *y = temp;
}

/* Dissasembly
    0000000000001170 <swap_xor>:
    1170:       8b 07                   mov    eax,DWORD PTR [rdi]
    1172:       33 06                   xor    eax,DWORD PTR [rsi]
    1174:       89 07                   mov    DWORD PTR [rdi],eax
    1176:       33 06                   xor    eax,DWORD PTR [rsi]
    1178:       89 06                   mov    DWORD PTR [rsi],eax
    117a:       31 07                   xor    DWORD PTR [rdi],eax
    117c:       c3                      ret    
    117d:       0f 1f 00                nop    DWORD PTR [rax]

0000000000001180 <swap_normal>:
    1180:       8b 07                   mov    eax,DWORD PTR [rdi]
    1182:       8b 16                   mov    edx,DWORD PTR [rsi]
    1184:       89 17                   mov    DWORD PTR [rdi],edx
    1186:       89 06                   mov    DWORD PTR [rsi],eax
    1188:       c3                      ret
*/