Imported Upstream version 0.9.6+really0.9.3upstream/0.9.6+really0.9.3

1 files changed, 164 insertions, 19 deletions

diff --git a/tests/test-frexpl.c b/tests/test-frexpl.c
index fc2a4de0..8d9d41d2 100644
--- a/tests/test-frexpl.c
+++ b/tests/test-frexpl.c
@@ -1,5 +1,5 @@
 /* Test of splitting a 'long double' into fraction and mantissa.
-   Copyright (C) 2007-2015 Free Software Foundation, Inc.
+   Copyright (C) 2007-2010 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
@@ -27,8 +27,6 @@ SIGNATURE_CHECK (frexpl, long double, (long double, int *));
 
 #include "fpucw.h"
 #include "isnanl-nolibm.h"
-#include "minus-zero.h"
-#include "infinity.h"
 #include "nan.h"
 #include "macros.h"
 
@@ -37,18 +35,6 @@ SIGNATURE_CHECK (frexpl, long double, (long double, int *));
 #undef exp
 #define exp exponent
 
-#undef INFINITY
-#undef NAN
-
-#define DOUBLE long double
-#define VOLATILE
-#define ISNAN isnanl
-#define INFINITY Infinityl ()
-#define NAN NaNl ()
-#define L_(literal) literal##L
-#define MINUS_ZERO minus_zerol
-#define MAX_EXP LDBL_MAX_EXP
-#define MIN_EXP LDBL_MIN_EXP
 /* 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'
@@ -61,18 +47,177 @@ SIGNATURE_CHECK (frexpl, long double, (long double, int *));
 #else
 # define MIN_NORMAL_EXP LDBL_MIN_EXP
 #endif
-#define FREXP frexpl
-#define RANDOM randoml
-#include "test-frexp.h"
+
+/* On HP-UX 10.20, negating 0.0L does not yield -0.0L.
+   So we use minus_zero instead.
+   IRIX cc can't put -0.0L into .data, but can compute at runtime.
+   Note that the expression -LDBL_MIN * LDBL_MIN does not work on other
+   platforms, such as when cross-compiling to PowerPC on MacOS X 10.5.  */
+#if defined __hpux || defined __sgi
+static long double
+compute_minus_zero (void)
+{
+  return -LDBL_MIN * LDBL_MIN;
+}
+# define minus_zero compute_minus_zero ()
+#else
+long double minus_zero = -0.0L;
+#endif
+
+static long double
+my_ldexp (long double x, int d)
+{
+  for (; d > 0; d--)
+    x *= 2.0L;
+  for (; d < 0; d++)
+    x *= 0.5L;
+  return x;
+}
 
 int
 main ()
 {
+  int i;
+  long double x;
   DECL_LONG_DOUBLE_ROUNDING
 
   BEGIN_LONG_DOUBLE_ROUNDING ();
 
-  test_function ();
+  { /* NaN.  */
+    int exp = -9999;
+    long double mantissa;
+    x = NaNl ();
+    mantissa = frexpl (x, &exp);
+    ASSERT (isnanl (mantissa));
+  }
+
+  { /* Positive infinity.  */
+    int exp = -9999;
+    long double mantissa;
+    x = 1.0L / 0.0L;
+    mantissa = frexpl (x, &exp);
+    ASSERT (mantissa == x);
+  }
+
+  { /* Negative infinity.  */
+    int exp = -9999;
+    long double mantissa;
+    x = -1.0L / 0.0L;
+    mantissa = frexpl (x, &exp);
+    ASSERT (mantissa == x);
+  }
+
+  { /* Positive zero.  */
+    int exp = -9999;
+    long double mantissa;
+    x = 0.0L;
+    mantissa = frexpl (x, &exp);
+    ASSERT (exp == 0);
+    ASSERT (mantissa == x);
+    ASSERT (!signbit (mantissa));
+  }
+
+  { /* Negative zero.  */
+    int exp = -9999;
+    long double mantissa;
+    x = minus_zero;
+    mantissa = frexpl (x, &exp);
+    ASSERT (exp == 0);
+    ASSERT (mantissa == x);
+    ASSERT (signbit (mantissa));
+  }
+
+  for (i = 1, x = 1.0L; i <= LDBL_MAX_EXP; i++, x *= 2.0L)
+    {
+      int exp = -9999;
+      long double mantissa = frexpl (x, &exp);
+      ASSERT (exp == i);
+      ASSERT (mantissa == 0.5L);
+    }
+  for (i = 1, x = 1.0L; i >= MIN_NORMAL_EXP; i--, x *= 0.5L)
+    {
+      int exp = -9999;
+      long double mantissa = frexpl (x, &exp);
+      ASSERT (exp == i);
+      ASSERT (mantissa == 0.5L);
+    }
+  for (; i >= LDBL_MIN_EXP - 100 && x > 0.0L; i--, x *= 0.5L)
+    {
+      int exp = -9999;
+      long double mantissa = frexpl (x, &exp);
+      ASSERT (exp == i);
+      ASSERT (mantissa == 0.5L);
+    }
+
+  for (i = 1, x = -1.0L; i <= LDBL_MAX_EXP; i++, x *= 2.0L)
+    {
+      int exp = -9999;
+      long double mantissa = frexpl (x, &exp);
+      ASSERT (exp == i);
+      ASSERT (mantissa == -0.5L);
+    }
+  for (i = 1, x = -1.0L; i >= MIN_NORMAL_EXP; i--, x *= 0.5L)
+    {
+      int exp = -9999;
+      long double mantissa = frexpl (x, &exp);
+      ASSERT (exp == i);
+      ASSERT (mantissa == -0.5L);
+    }
+  for (; i >= LDBL_MIN_EXP - 100 && x < 0.0L; i--, x *= 0.5L)
+    {
+      int exp = -9999;
+      long double mantissa = frexpl (x, &exp);
+      ASSERT (exp == i);
+      ASSERT (mantissa == -0.5L);
+    }
+
+  for (i = 1, x = 1.01L; i <= LDBL_MAX_EXP; i++, x *= 2.0L)
+    {
+      int exp = -9999;
+      long double mantissa = frexpl (x, &exp);
+      ASSERT (exp == i);
+      ASSERT (mantissa == 0.505L);
+    }
+  for (i = 1, x = 1.01L; i >= MIN_NORMAL_EXP; i--, x *= 0.5L)
+    {
+      int exp = -9999;
+      long double mantissa = frexpl (x, &exp);
+      ASSERT (exp == i);
+      ASSERT (mantissa == 0.505L);
+    }
+  for (; i >= LDBL_MIN_EXP - 100 && x > 0.0L; i--, x *= 0.5L)
+    {
+      int exp = -9999;
+      long double mantissa = frexpl (x, &exp);
+      ASSERT (exp == i);
+      ASSERT (mantissa >= 0.5L);
+      ASSERT (mantissa < 1.0L);
+      ASSERT (mantissa == my_ldexp (x, - exp));
+    }
+
+  for (i = 1, x = 1.73205L; i <= LDBL_MAX_EXP; i++, x *= 2.0L)
+    {
+      int exp = -9999;
+      long double mantissa = frexpl (x, &exp);
+      ASSERT (exp == i);
+      ASSERT (mantissa == 0.866025L);
+    }
+  for (i = 1, x = 1.73205L; i >= MIN_NORMAL_EXP; i--, x *= 0.5L)
+    {
+      int exp = -9999;
+      long double mantissa = frexpl (x, &exp);
+      ASSERT (exp == i);
+      ASSERT (mantissa == 0.866025L);
+    }
+  for (; i >= LDBL_MIN_EXP - 100 && x > 0.0L; i--, x *= 0.5L)
+    {
+      int exp = -9999;
+      long double mantissa = frexpl (x, &exp);
+      ASSERT (exp == i || exp == i + 1);
+      ASSERT (mantissa >= 0.5L);
+      ASSERT (mantissa < 1.0L);
+      ASSERT (mantissa == my_ldexp (x, - exp));
+    }
 
   return 0;
 }