| #ifdef __INT16_TYPE__ |
| typedef __INT16_TYPE__ int16_t; |
| #else |
| typedef short int16_t; |
| #endif |
| |
| #ifdef __UINT32_TYPE__ |
| typedef __UINT32_TYPE__ uint32_t; |
| #else |
| typedef unsigned uint32_t; |
| #endif |
| |
| #define __fake_const_swab32(x) ((uint32_t)( \ |
| (((uint32_t) (x) & (uint32_t)0x000000ffUL) << 24) | \ |
| (((uint32_t)(int16_t)(x) & (uint32_t)0x00ffff00UL) << 8) | \ |
| (((uint32_t) (x) & (uint32_t)0x00ff0000UL) >> 8) | \ |
| (((uint32_t) (x) & (uint32_t)0xff000000UL) >> 24))) |
| |
| |
| /* Previous version of bswap optimization failed to consider sign extension |
| and as a result would replace an expression *not* doing a bswap by a |
| bswap. */ |
| |
| __attribute__ ((noinline, noclone)) uint32_t |
| fake_bswap32 (uint32_t in) |
| { |
| return __fake_const_swab32 (in); |
| } |
| |
| int |
| main(void) |
| { |
| if (sizeof (uint32_t) * __CHAR_BIT__ != 32) |
| return 0; |
| if (sizeof (int16_t) * __CHAR_BIT__ != 16) |
| return 0; |
| if (fake_bswap32 (0x81828384) != 0xff838281) |
| __builtin_abort (); |
| return 0; |
| } |