X-Git-Url: http://erislabs.net/gitweb/?a=blobdiff_plain;f=tests%2Ftest-printf-frexpl.c;h=c4c156a93c3c728b5de3a4dabdd93b6f110f0179;hb=9c9a9765811eb1e698517065953e09d6b8c07400;hp=32c92e8f3055f5ca2dbef9a03151f19fa39f7bc0;hpb=f6183e64302b3af947cdd932049180b5a32f6443;p=gnulib.git
diff --git a/tests/test-printf-frexpl.c b/tests/test-printf-frexpl.c
index 32c92e8f3..c4c156a93 100644
--- a/tests/test-printf-frexpl.c
+++ b/tests/test-printf-frexpl.c
@@ -1,10 +1,10 @@
/* Test of splitting a 'long double' into fraction and mantissa.
- Copyright (C) 2007 Free Software Foundation, Inc.
+ Copyright (C) 2007-2008 Free Software Foundation, Inc.
- This program is free software; you can redistribute it and/or modify
+ 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 2, or (at your option)
- any later version.
+ 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
@@ -12,8 +12,7 @@
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, write to the Free Software Foundation,
- Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. */
+ along with this program. If not, see . */
/* Written by Bruno Haible , 2007. */
@@ -22,9 +21,38 @@
#include "printf-frexpl.h"
#include
+#include
#include
-#define ASSERT(expr) if (!(expr)) abort ();
+#include "fpucw.h"
+
+#define ASSERT(expr) \
+ do \
+ { \
+ if (!(expr)) \
+ { \
+ fprintf (stderr, "%s:%d: assertion failed\n", __FILE__, __LINE__); \
+ fflush (stderr); \
+ abort (); \
+ } \
+ } \
+ while (0)
+
+/* On MIPS IRIX machines, LDBL_MIN_EXP is -1021, but the smallest reliable
+ exponent for 'long double' is -964. Similarly, on PowerPC machines,
+ LDBL_MIN_EXP is -1021, but the smallest reliable exponent for 'long double'
+ is -968. For exponents below that, the precision may be truncated to the
+ precision used for 'double'. */
+#ifdef __sgi
+# define MIN_NORMAL_EXP (LDBL_MIN_EXP + 57)
+# define MIN_SUBNORMAL_EXP MIN_NORMAL_EXP
+#elif defined __ppc || defined __ppc__ || defined __powerpc || defined __powerpc__
+# define MIN_NORMAL_EXP (LDBL_MIN_EXP + 53)
+# define MIN_SUBNORMAL_EXP MIN_NORMAL_EXP
+#else
+# define MIN_NORMAL_EXP LDBL_MIN_EXP
+# define MIN_SUBNORMAL_EXP (LDBL_MIN_EXP - 100)
+#endif
static long double
my_ldexp (long double x, int d)
@@ -41,6 +69,9 @@ main ()
{
int i;
long double x;
+ DECL_LONG_DOUBLE_ROUNDING
+
+ BEGIN_LONG_DOUBLE_ROUNDING ();
for (i = 1, x = 1.0L; i <= LDBL_MAX_EXP; i++, x *= 2.0L)
{
@@ -49,14 +80,14 @@ main ()
ASSERT (exp == i - 1);
ASSERT (mantissa == 1.0L);
}
- for (i = 1, x = 1.0L; i >= LDBL_MIN_EXP; i--, x *= 0.5L)
+ for (i = 1, x = 1.0L; i >= MIN_NORMAL_EXP; i--, x *= 0.5L)
{
int exp = -9999;
long double mantissa = printf_frexpl (x, &exp);
ASSERT (exp == i - 1);
ASSERT (mantissa == 1.0L);
}
- for (; i >= LDBL_MIN_EXP - 100 && x > 0.0L; i--, x *= 0.5L)
+ for (; i >= MIN_SUBNORMAL_EXP && x > 0.0L; i--, x *= 0.5L)
{
int exp = -9999;
long double mantissa = printf_frexpl (x, &exp);
@@ -71,14 +102,14 @@ main ()
ASSERT (exp == i - 1);
ASSERT (mantissa == 1.01L);
}
- for (i = 1, x = 1.01L; i >= LDBL_MIN_EXP; i--, x *= 0.5L)
+ for (i = 1, x = 1.01L; i >= MIN_NORMAL_EXP; i--, x *= 0.5L)
{
int exp = -9999;
long double mantissa = printf_frexpl (x, &exp);
ASSERT (exp == i - 1);
ASSERT (mantissa == 1.01L);
}
- for (; i >= LDBL_MIN_EXP - 100 && x > 0.0L; i--, x *= 0.5L)
+ for (; i >= MIN_SUBNORMAL_EXP && x > 0.0L; i--, x *= 0.5L)
{
int exp = -9999;
long double mantissa = printf_frexpl (x, &exp);
@@ -95,14 +126,14 @@ main ()
ASSERT (exp == i - 1);
ASSERT (mantissa == 1.73205L);
}
- for (i = 1, x = 1.73205L; i >= LDBL_MIN_EXP; i--, x *= 0.5L)
+ for (i = 1, x = 1.73205L; i >= MIN_NORMAL_EXP; i--, x *= 0.5L)
{
int exp = -9999;
long double mantissa = printf_frexpl (x, &exp);
ASSERT (exp == i - 1);
ASSERT (mantissa == 1.73205L);
}
- for (; i >= LDBL_MIN_EXP - 100 && x > 0.0L; i--, x *= 0.5L)
+ for (; i >= MIN_SUBNORMAL_EXP && x > 0.0L; i--, x *= 0.5L)
{
int exp = -9999;
long double mantissa = printf_frexpl (x, &exp);