1 2 #include <stdio.h> 3 4 typedef unsigned int UInt; 5 typedef unsigned long long ULong; 6 7 #if defined(__x86_64__) 8 9 #define BSWAPQ(_lval) \ 10 do { \ 11 __asm__ __volatile__("bswapq %0" \ 12 : /*out*/ "+r"(_lval) ); \ 13 } while (0) 14 bswapq(ULong x)15ULong bswapq ( ULong x ) 16 { 17 BSWAPQ(x); BSWAPQ(x); 18 BSWAPQ(x); BSWAPQ(x); 19 BSWAPQ(x); BSWAPQ(x); 20 BSWAPQ(x); BSWAPQ(x); 21 BSWAPQ(x); BSWAPQ(x); 22 BSWAPQ(x); BSWAPQ(x); 23 BSWAPQ(x); BSWAPQ(x); 24 BSWAPQ(x); BSWAPQ(x); 25 BSWAPQ(x); BSWAPQ(x); 26 BSWAPQ(x); BSWAPQ(x); 27 BSWAPQ(x); BSWAPQ(x); 28 BSWAPQ(x); BSWAPQ(x); 29 BSWAPQ(x); BSWAPQ(x); 30 BSWAPQ(x); BSWAPQ(x); 31 BSWAPQ(x); BSWAPQ(x); 32 BSWAPQ(x); BSWAPQ(x); 33 BSWAPQ(x); BSWAPQ(x); 34 BSWAPQ(x); BSWAPQ(x); 35 BSWAPQ(x); BSWAPQ(x); 36 BSWAPQ(x); BSWAPQ(x); 37 BSWAPQ(x); BSWAPQ(x); 38 BSWAPQ(x); BSWAPQ(x); 39 BSWAPQ(x); BSWAPQ(x); 40 BSWAPQ(x); BSWAPQ(x); 41 BSWAPQ(x); BSWAPQ(x); 42 BSWAPQ(x); BSWAPQ(x); 43 BSWAPQ(x); BSWAPQ(x); 44 BSWAPQ(x); BSWAPQ(x); 45 BSWAPQ(x); BSWAPQ(x); 46 BSWAPQ(x); BSWAPQ(x); 47 BSWAPQ(x); BSWAPQ(x); 48 BSWAPQ(x); BSWAPQ(x); 49 BSWAPQ(x); 50 return x; 51 } 52 53 #endif /* defined(__x86_64__) */ 54 55 #define BSWAPL(_lval) \ 56 do { \ 57 __asm__ __volatile__("bswapl %0" \ 58 : /*out*/ "+r"(_lval) ); \ 59 } while (0) 60 bswapl(UInt x)61UInt bswapl ( UInt x ) 62 { 63 BSWAPL(x); BSWAPL(x); 64 BSWAPL(x); BSWAPL(x); 65 BSWAPL(x); BSWAPL(x); 66 BSWAPL(x); BSWAPL(x); 67 BSWAPL(x); BSWAPL(x); 68 BSWAPL(x); BSWAPL(x); 69 BSWAPL(x); BSWAPL(x); 70 BSWAPL(x); BSWAPL(x); 71 BSWAPL(x); BSWAPL(x); 72 BSWAPL(x); BSWAPL(x); 73 BSWAPL(x); BSWAPL(x); 74 BSWAPL(x); BSWAPL(x); 75 BSWAPL(x); BSWAPL(x); 76 BSWAPL(x); BSWAPL(x); 77 BSWAPL(x); BSWAPL(x); 78 BSWAPL(x); BSWAPL(x); 79 BSWAPL(x); BSWAPL(x); 80 BSWAPL(x); BSWAPL(x); 81 BSWAPL(x); BSWAPL(x); 82 BSWAPL(x); BSWAPL(x); 83 BSWAPL(x); BSWAPL(x); 84 BSWAPL(x); BSWAPL(x); 85 BSWAPL(x); BSWAPL(x); 86 BSWAPL(x); BSWAPL(x); 87 BSWAPL(x); BSWAPL(x); 88 BSWAPL(x); BSWAPL(x); 89 BSWAPL(x); BSWAPL(x); 90 BSWAPL(x); BSWAPL(x); 91 BSWAPL(x); BSWAPL(x); 92 BSWAPL(x); BSWAPL(x); 93 BSWAPL(x); BSWAPL(x); 94 BSWAPL(x); BSWAPL(x); 95 BSWAPL(x); 96 return x; 97 } 98 main(void)99int main ( void ) 100 { 101 #if defined(__x86_64__) 102 printf("0x%llx\n", bswapq( 0x8877665544332211ULL )); 103 #endif 104 printf("0x%x\n", bswapl( 0x44332211ULL )); 105 return 0; 106 } 107