/* Test of rounding towards positive infinity.
- Copyright (C) 2007-2010 Free Software Foundation, Inc.
+ Copyright (C) 2007-2011 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
#include <stdio.h>
#include "isnanf-nolibm.h"
+#include "minus-zero.h"
#include "macros.h"
#define MANT_DIG FLT_MANT_DIG
#define L_(literal) literal##f
+/* -0.0. See minus-zero.h. */
+#define MINUS_ZERO minus_zerof
+
/* 2^(MANT_DIG-1). */
static const DOUBLE TWO_MANT_DIG =
/* Assume MANT_DIG <= 5 * 31.
}
else if (z < L_(0.0))
{
+ /* For -1 < x < 0, return -0.0 regardless of the current rounding
+ mode. */
+ if (z > L_(-1.0))
+ z = MINUS_ZERO;
/* Avoid rounding errors for values near -2^k, where k >= MANT_DIG-1. */
- if (z > - TWO_MANT_DIG)
+ else if (z > - TWO_MANT_DIG)
{
/* Round to the next integer (nearest or up or down, doesn't matter). */
z -= TWO_MANT_DIG;