| unsigned long long __cdecl _byteswap_uint64(unsigned long long _Int64); |
| |
| unsigned long long __cdecl _byteswap_uint64(unsigned long long _Int64) |
| { |
| #ifdef _WIN64 |
| unsigned long long retval; |
| __asm__ __volatile__ ("bswapq %[retval]" : [retval] "=rm" (retval) : "[retval]" (_Int64)); |
| return retval; |
| #else |
| union { |
| long long int64part; |
| struct { |
| unsigned long lowpart; |
| unsigned long hipart; |
| }; |
| } retval; |
| retval.int64part = _Int64; |
| __asm__ __volatile__ ("bswapl %[lowpart]\n" |
| "bswapl %[hipart]\n" |
| : [lowpart] "=rm" (retval.hipart), [hipart] "=rm" (retval.lowpart) : "[lowpart]" (retval.lowpart), "[hipart]" (retval.hipart)); |
| return retval.int64part; |
| #endif |
| } |