/* Test of rounding towards zero.
Copyright (C) 2007 Free Software Foundation, Inc.
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 3 of the License, or
(at your option) any later version.
This program 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 General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see . */
/* Written by Bruno Haible , 2007. */
#include
#include
#include
#include
#include "isnanf.h"
#define ASSERT(expr) \
do \
{ \
if (!(expr)) \
{ \
fprintf (stderr, "%s:%d: assertion failed\n", __FILE__, __LINE__); \
abort (); \
} \
} \
while (0)
/* The Compaq (ex-DEC) C 6.4 compiler chokes on the expression 0.0 / 0.0. */
#ifdef __DECC
static float
NaN ()
{
static float zero = 0.0f;
return zero / zero;
}
#else
# define NaN() (0.0f / 0.0f)
#endif
int
main ()
{
/* Zero. */
ASSERT (truncf (0.0f) == 0.0f);
ASSERT (truncf (-0.0f) == 0.0f);
/* Positive numbers. */
ASSERT (truncf (0.3f) == 0.0f);
ASSERT (truncf (0.7f) == 0.0f);
ASSERT (truncf (1.0f) == 1.0f);
ASSERT (truncf (1.5f) == 1.0f);
ASSERT (truncf (1.999f) == 1.0f);
ASSERT (truncf (2.0f) == 2.0f);
ASSERT (truncf (65535.99f) == 65535.0f);
ASSERT (truncf (65536.0f) == 65536.0f);
ASSERT (truncf (2.341e31f) == 2.341e31f);
/* Negative numbers. */
ASSERT (truncf (-0.3f) == 0.0f);
ASSERT (truncf (-0.7f) == 0.0f);
ASSERT (truncf (-1.0f) == -1.0f);
ASSERT (truncf (-1.5f) == -1.0f);
ASSERT (truncf (-1.999f) == -1.0f);
ASSERT (truncf (-2.0f) == -2.0f);
ASSERT (truncf (-65535.99f) == -65535.0f);
ASSERT (truncf (-65536.0f) == -65536.0f);
ASSERT (truncf (-2.341e31f) == -2.341e31f);
/* Infinite numbers. */
ASSERT (truncf (1.0f / 0.0f) == 1.0f / 0.0f);
ASSERT (truncf (-1.0f / 0.0f) == -1.0f / 0.0f);
/* NaNs. */
ASSERT (isnanf (truncf (NaN ())));
return 0;
}