/* Copyright (C) 1999-2018 Free Software Foundation, Inc.

   This file is part of the GNU C Library.

   Contributed by Andreas Jaeger <aj@suse.de>, 1999.

   The GNU C Library is free software; you can redistribute it and/or

   modify it under the terms of the GNU Lesser General Public

   License as published by the Free Software Foundation; either

   version 2.1 of the License, or (at your option) any later version.

   The GNU C Library is distributed in the hope that it will be useful,

   but WITHOUT ANY WARRANTY; without even the implied warranty of

   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU

   Lesser General Public License for more details.

   You should have received a copy of the GNU Lesser General Public

   License along with the GNU C Library; if not, see

   <http://www.gnu.org/licenses/>.  */

#include <math.h>

#include <float.h>

#include <stdio.h>

#include <math-tests.h>

static int errors = 0;

static void

check (const char *testname, int result)

{

  if (!result) {

    printf ("Failure: %s\n", testname);

    errors++;

  }

}

#define TEST_FUNC(NAME, FLOAT, SUFFIX, EPSILON, HUGEVAL)		      \

static void								      \

NAME (void)								      \

{									      \

  /* Variables are declared volatile to forbid some compiler		      \

     optimizations.  */							      \

  volatile FLOAT Inf_var, qNaN_var, zero_var, one_var;			      \

  /* A sNaN is only guaranteed to be representable in variables with */	      \

  /* static (or thread-local) storage duration.  */			      \

  static volatile FLOAT sNaN_var = __builtin_nans ## SUFFIX ("");	      \

  static volatile FLOAT minus_sNaN_var = -__builtin_nans ## SUFFIX ("");      \

  FLOAT x1, x2;								      \

									      \

  zero_var = 0.0;							      \

  one_var = 1.0;							      \

  qNaN_var = __builtin_nan ## SUFFIX ("");				      \

  Inf_var = one_var / zero_var;						      \

									      \

  (void) &zero_var;							      \

  (void) &one_var;							      \

  (void) &qNaN_var;							      \

  (void) &sNaN_var;							      \

  (void) &minus_sNaN_var;						      \

  (void) &Inf_var;							      \

									      \

									      \

  check (#FLOAT " isinf (inf) == 1", isinf (Inf_var) == 1);		      \

  check (#FLOAT " isinf (-inf) == -1", isinf (-Inf_var) == -1);		      \

  check (#FLOAT " !isinf (1)", !(isinf (one_var)));			      \

  check (#FLOAT " !isinf (qNaN)", !(isinf (qNaN_var)));			      \

  if (SNAN_TESTS (FLOAT))						      \

    check (#FLOAT " !isinf (sNaN)", !(isinf (sNaN_var)));		      \

									      \

  check (#FLOAT " isnan (qNaN)", isnan (qNaN_var));			      \

  if (SNAN_TESTS (FLOAT))						      \

    check (#FLOAT " isnan (sNaN)", isnan (sNaN_var));			      \

  check (#FLOAT " isnan (-qNaN)", isnan (-qNaN_var));			      \

  if (SNAN_TESTS (FLOAT))						      \

    check (#FLOAT " isnan (-sNaN)", isnan (minus_sNaN_var));		      \

  check (#FLOAT " !isnan (1)", !(isnan (one_var)));			      \

  check (#FLOAT " !isnan (inf)", !(isnan (Inf_var)));			      \

									      \

  check (#FLOAT " !issignaling (qNaN)", !(issignaling (qNaN_var)));	      \

  if (SNAN_TESTS (FLOAT))						      \

    check (#FLOAT " issignaling (sNaN)", issignaling (sNaN_var));	      \

  check (#FLOAT " !issignaling (-qNaN)", !(issignaling (-qNaN_var)));	      \

  if (SNAN_TESTS (FLOAT))						      \

    check (#FLOAT " issignaling (-sNaN)", issignaling (minus_sNaN_var));      \

  check (#FLOAT " !issignaling (1)", !(issignaling (one_var)));		      \

  check (#FLOAT " !issignaling (inf)", !(issignaling (Inf_var)));	      \

									      \

  check (#FLOAT " inf == inf", Inf_var == Inf_var);			      \

  check (#FLOAT " -inf == -inf", -Inf_var == -Inf_var);			      \

  check (#FLOAT " inf != -inf", Inf_var != -Inf_var);			      \

  check (#FLOAT " qNaN != qNaN", qNaN_var != qNaN_var);			      \

  if (SNAN_TESTS (FLOAT))						      \

    check (#FLOAT " sNaN != sNaN", sNaN_var != sNaN_var);		      \

  if (SNAN_TESTS (FLOAT))						      \

    check (#FLOAT " qNaN != sNaN", qNaN_var != sNaN_var);		      \

  if (SNAN_TESTS (FLOAT))						      \

    check (#FLOAT " -sNaN != -sNaN", minus_sNaN_var != minus_sNaN_var);	      \

  if (SNAN_TESTS (FLOAT))						      \

    check (#FLOAT " sNaN != -sNaN", sNaN_var != minus_sNaN_var);	      \

  if (SNAN_TESTS (FLOAT))						      \

    check (#FLOAT " qNaN != -sNaN", qNaN_var != minus_sNaN_var);	      \

									      \

  /*									      \

     the same tests but this time with NAN from <bits/nan.h>		      \

     NAN is a double const						      \

   */									      \

  check (#FLOAT " isnan (NAN)", isnan (NAN));				      \

  check (#FLOAT " isnan (-NAN)", isnan (-NAN));				      \

  check (#FLOAT " !isinf (NAN)", !(isinf (NAN)));			      \

  check (#FLOAT " !isinf (-NAN)", !(isinf (-NAN)));			      \

  check (#FLOAT " NAN != NAN", NAN != NAN);				      \

  check (#FLOAT " NAN != qNaN", NAN != qNaN_var);			      \

  if (SNAN_TESTS (FLOAT))						      \

    check (#FLOAT " NAN != sNaN", NAN != sNaN_var);			      \

  if (SNAN_TESTS (FLOAT))						      \

    check (#FLOAT " NAN != -sNaN", NAN != minus_sNaN_var);		      \

									      \

  /*									      \

     And again with the value returned by the `nan' function.		      \

   */									      \

  check (#FLOAT " isnan (nan (\"\"))", isnan (nan ## SUFFIX ("")));	      \

  check (#FLOAT " isnan (-nan (\"\"))", isnan (-nan ## SUFFIX ("")));	      \

  check (#FLOAT " !isinf (nan (\"\"))", !(isinf (nan ## SUFFIX (""))));	      \

  check (#FLOAT " !isinf (-nan (\"\"))", !(isinf (-nan ## SUFFIX (""))));     \

  check (#FLOAT " nan (\"\") != nan (\"\")",				      \

	 nan ## SUFFIX ("") != nan ## SUFFIX (""));			      \

  check (#FLOAT " nan (\"\") != qNaN", nan ## SUFFIX ("") != qNaN_var);	      \

  if (SNAN_TESTS (FLOAT))						      \

    check (#FLOAT " nan (\"\") != sNaN", nan ## SUFFIX ("") != sNaN_var);     \

  if (SNAN_TESTS (FLOAT))						      \

    check (#FLOAT " nan (\"\") != -sNaN",				      \

	   nan ## SUFFIX ("") != minus_sNaN_var);			      \

									      \

  /* test if EPSILON is ok */						      \

  x1 = 1.0;								      \

  x2 = x1 + EPSILON;							      \

  check (#FLOAT " 1 != 1+EPSILON", x1 != x2);				      \

									      \

  x1 = 1.0;								      \

  x2 = x1 - EPSILON;							      \

  check (#FLOAT " 1 != 1-EPSILON", x1 != x2);				      \

									      \

  /* test if HUGE_VALx is ok */						      \

  x1 = HUGEVAL;								      \

  check (#FLOAT " isinf (HUGE_VALx) == +1", isinf (x1) == +1);		      \

  x1 = - HUGEVAL;							      \

  check (#FLOAT " isinf (-HUGE_VALx) == -1", isinf (x1) == -1);		      \

}

#define TEST_CONVERT(NAME, FLOAT, DOUBLE, SUFFIX)			      \

void									      \

NAME (void)								      \

{									      \

  volatile DOUBLE Inf_var, qNaN_var, zero_var, one_var;			      \

  /* A sNaN is only guaranteed to be representable in variables with */	      \

  /* static (or thread-local) storage duration.  */			      \

  static volatile DOUBLE sNaN_var = __builtin_nans ## SUFFIX ("");	      \

  FLOAT x1, x2;								      \

									      \

  zero_var = 0.0;							      \

  one_var = 1.0;							      \

  qNaN_var = __builtin_nan ## SUFFIX ("");				      \

  Inf_var = one_var / zero_var;						      \

									      \

  (void) &qNaN_var;							      \

  (void) &sNaN_var;							      \

  (void) &Inf_var;							      \

									      \

  x1 = (FLOAT) qNaN_var;						      \

  check (" "#FLOAT" x = ("#FLOAT") ("#DOUBLE") qNaN, isnan", isnan (x1));     \

  check (" "#FLOAT" x = ("#FLOAT") ("#DOUBLE") qNaN, !issignaling",	      \

	 !issignaling (x1));						      \

  if (SNAN_TESTS (FLOAT))						      \

    {									      \

      x1 = (FLOAT) sNaN_var;						      \

      check (" "#FLOAT" x = ("#FLOAT") ("#DOUBLE") sNaN, isnan", isnan (x1)); \

      if (SNAN_TESTS_TYPE_CAST)						      \

	{								      \

	  /* Upon type conversion, a sNaN is converted into a qNaN plus an */ \

	  /* INVALID exception (not checked here).  */			      \

	  check (" "#FLOAT" x = ("#FLOAT") ("#DOUBLE") sNaN, !issignaling",   \

		 !issignaling (x1));					      \

	}								      \

      }									      \

  x2 = (FLOAT) Inf_var;							      \

  check (" "#FLOAT" x = ("#FLOAT") ("#DOUBLE") Inf", isinf (x2) != 0);	      \

}

TEST_FUNC (float_test, float, f, FLT_EPSILON, HUGE_VALF)

TEST_FUNC (double_test, double, , DBL_EPSILON, HUGE_VAL)

TEST_CONVERT (convert_dfsf_test, float, double, )

TEST_CONVERT (convert_sfdf_test, double, float, f)

#if LDBL_MANT_DIG > DBL_MANT_DIG

TEST_FUNC (ldouble_test, long double, l, LDBL_EPSILON, HUGE_VALL)

TEST_CONVERT (convert_tfsf_test, float, long double, l)

TEST_CONVERT (convert_sftf_test, long double, float, f)

TEST_CONVERT (convert_tfdf_test, double, long double, l)

TEST_CONVERT (convert_dftf_test, long double, double, )

#endif

int

do_test (void)

{

  float_test ();

  double_test ();

  convert_dfsf_test();

  convert_sfdf_test();

#if LDBL_MANT_DIG > DBL_MANT_DIG

  ldouble_test ();

  convert_tfsf_test();

  convert_sftf_test();

  convert_tfdf_test();

  convert_dftf_test();

#endif

  return errors != 0;

}

#define TEST_FUNCTION do_test ()

#include "../test-skeleton.c"