| /* { dg-do compile } */ |
| /* { dg-require-effective-target bswap } */ |
| /* { dg-require-effective-target stdint_types } */ |
| /* { dg-options "-O2 -fdump-tree-optimized" } */ |
| /* { dg-additional-options "-mzarch" { target s390*-*-* } } */ |
| |
| #include <stdint.h> |
| |
| /* A variant via unsigned short. */ |
| |
| uint64_t |
| swap64_c (uint64_t x) |
| { |
| uint16_t a0 = x >> 48; |
| uint16_t a1 = x >> 32; |
| uint16_t a2 = x >> 16; |
| uint16_t a3 = x; |
| |
| return ((uint64_t) (((a0 >> 8) & 0xff) | ((a0 << 8) & 0xff00))) |
| | ((uint64_t) (((a1 >> 8) & 0xff) | ((a1 << 8) & 0xff00)) << 16) |
| | ((uint64_t) (((a2 >> 8) & 0xff) | ((a2 << 8) & 0xff00)) << 32) |
| | ((uint64_t) (((a3 >> 8) & 0xff) | ((a3 << 8) & 0xff00)) << 48); |
| } |
| |
| |
| /* { dg-final { scan-tree-dump-times "= __builtin_bswap64 \\\(" 1 "optimized" } } */ |
