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#include <string.h>

#include <stdlib.h>

#include <float.h>

#define fpsizeoff       sizeof(float)

#define fpsizeof        sizeof(double)

#define fpsizeofl       sizeof(long double)

/* Work around the fact that with the Intel double-extended precision,

   we've got a 10 byte type stuffed into some amount of padding.  And

   the fact that -ffloat-store is going to stuff this value temporarily

   into some bit of stack frame that we've no control over and can't zero.  */

#if LDBL_MANT_DIG == 64

# if defined(__i386__) || defined(__x86_64__) || defined (__ia64__)

#  undef fpsizeofl

#  define fpsizeofl     10

# endif

#endif

/* Work around the fact that the sign of the second double in the IBM

   double-double format is not strictly specified when it contains a zero.

   For instance, -0.0L can be represented with either (-0.0, +0.0) or

   (-0.0, -0.0).  The former is what we'll get from the compiler when it

   builds constants; the later is what we'll get from the negation operator

   at runtime.  */

/* ??? This hack only works for big-endian, which is fortunately true for

   all of AIX, Darwin, and Irix.  */

#if LDBL_MANT_DIG == 106

# undef fpsizeofl

# define fpsizeofl      sizeof(double)

#endif

#define TEST(TYPE, EXT)                                         \

TYPE c##EXT (TYPE x, TYPE y)                                    \

{                                                               \

  return __builtin_copysign##EXT (x, y);                        \

}                                                               \

                                                                \

struct D##EXT { TYPE x, y, z; };                                \

                                                                \

static const struct D##EXT T##EXT[] = {                         \

  { 1.0, 2.0, 1.0 },                                            \

  { 1.0, -2.0, -1.0 },                                          \

  { -1.0, -2.0, -1.0 },                                         \

  { 0.0, -2.0, -0.0 },                                          \

  { -0.0, -2.0, -0.0 },                                         \

  { -0.0, 2.0, 0.0 },                                           \

  { __builtin_inf##EXT (), -0.0, -__builtin_inf##EXT () },      \

  { -__builtin_nan##EXT (""), __builtin_inf##EXT (),            \

    __builtin_nan##EXT ("") }                                   \

};                                                              \

                                                                \

void test##EXT (void)                                           \

{                                                               \

  int i, n = sizeof (T##EXT) / sizeof (T##EXT[0]);              \

  TYPE r;                                                       \

  for (i = 0; i < n; ++i)                                        \

    {                                                           \

      r = c##EXT (T##EXT[i].x, T##EXT[i].y);                    \

      if (memcmp (&r, &T##EXT[i].z, fpsizeof##EXT) != 0)        \

        abort ();                                               \

    }                                                           \

}

TEST(float, f)

TEST(double, )

TEST(long double, l)

int main()

{

  testf();

  test();

  testl();

  return 0;

}