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/* { dg-do compile { target arm*-*-* alpha*-*-* ia64*-*-* x86_64-*-* s390x-*-* powerpc*-*-* rs6000-*-* } } */

/* { dg-require-effective-target stdint_types } */

/* { dg-require-effective-target lp64 } */

/* { dg-options "-O2 -fdump-tree-bswap" } */

#include <stdint.h>

#define __const_swab64(x) ((uint64_t)(                                          \

        (((uint64_t)(x) & (uint64_t)0x00000000000000ffULL) << 56) |             \

        (((uint64_t)(x) & (uint64_t)0x000000000000ff00ULL) << 40) |             \

        (((uint64_t)(x) & (uint64_t)0x0000000000ff0000ULL) << 24) |             \

        (((uint64_t)(x) & (uint64_t)0x00000000ff000000ULL) <<  8) |             \

        (((uint64_t)(x) & (uint64_t)0x000000ff00000000ULL) >>  8) |             \

        (((uint64_t)(x) & (uint64_t)0x0000ff0000000000ULL) >> 24) |             \

        (((uint64_t)(x) & (uint64_t)0x00ff000000000000ULL) >> 40) |             \

        (((uint64_t)(x) & (uint64_t)0xff00000000000000ULL) >> 56)))

/* This byte swap implementation is used by the Linux kernel and the

   GNU C library.  */

uint64_t

swap64 (uint64_t in)

{

  return __const_swab64 (in);

}

/* 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 DItype __attribute__ ((mode (DI)));

DItype

swap64_b (DItype u)

{

  return ((((u) & 0xff00000000000000ull) >> 56)

          | (((u) & 0x00ff000000000000ull) >> 40)

          | (((u) & 0x0000ff0000000000ull) >> 24)

          | (((u) & 0x000000ff00000000ull) >>  8)

          | (((u) & 0x00000000ff000000ull) <<  8)

          | (((u) & 0x0000000000ff0000ull) << 24)

          | (((u) & 0x000000000000ff00ull) << 40)

          | (((u) & 0x00000000000000ffull) << 56));

}

/* The OpenSSL variant.  */

uint64_t

swap64_c (uint64_t x)

{

  uint32_t a = x >> 32;

  uint32_t b = (uint32_t) x;

  return ((uint64_t) ((((((b)) >> (8)) | (((b)) << (32 - (8)))) & 0xff00ff00L)

                      | (((((b)) << (8)) | (((b)) >> (32 - (8)))) & 0x00ff00ffL)) << 32)

          | (uint64_t) ((((((a)) >> (8)) | (((a)) << (32 - (8)))) & 0xff00ff00L)

                        | (((((a)) << (8)) | (((a)) >> (32 - (8)))) & 0x00ff00ffL));

}

/* { dg-final { scan-tree-dump-times "64 bit bswap implementation found at" 3 "bswap" } } */

/* { dg-final { cleanup-tree-dump "bswap" } } */