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[/] [openrisc/] [trunk/] [gnu-src/] [gcc-4.5.1/] [gcc/] [testsuite/] [gcc.dg/] [optimize-bswapsi-1.c] - Rev 414
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/* { dg-do compile { target arm*-*-* alpha*-*-* i?86-*-* powerpc*-*-* rs6000-*-* x86_64-*-* s390*-*-* } } */ /* { dg-require-effective-target stdint_types } */ /* { dg-options "-O2 -fdump-tree-bswap" } */ #include <stdint.h> #define __const_swab32(x) ((uint32_t)( \ (((uint32_t)(x) & (uint32_t)0x000000ffUL) << 24) | \ (((uint32_t)(x) & (uint32_t)0x0000ff00UL) << 8) | \ (((uint32_t)(x) & (uint32_t)0x00ff0000UL) >> 8) | \ (((uint32_t)(x) & (uint32_t)0xff000000UL) >> 24))) /* This byte swap implementation is used by the Linux kernel and the GNU C library. */ uint32_t swap32_a (uint32_t in) { return __const_swab32 (in); } /* The OpenSSH byte swap implementation. */ uint32_t swap32_b (uint32_t in) { uint32_t a; a = (in << 16) | (in >> 16); a = ((a & 0x00ff00ff) << 8) | ((a & 0xff00ff00) >> 8); return a; } /* This variant is currently used by libgcc. The difference is that the bswap source and destination have a signed integer type which requires a slightly higher search depth in order to dive through the cast as well. */ typedef int SItype __attribute__ ((mode (SI))); SItype swap32_c (SItype u) { return ((((u) & 0xff000000) >> 24) | (((u) & 0x00ff0000) >> 8) | (((u) & 0x0000ff00) << 8) | (((u) & 0x000000ff) << 24)); } /* { dg-final { scan-tree-dump-times "32 bit bswap implementation found at" 3 "bswap" } } */ /* { dg-final { cleanup-tree-dump "bswap" } } */
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