.

11 files changed, 658 insertions, 50 deletions

diff --git a/math/atest-exp.c b/math/atest-exp.c
index 2f168c9a6d..158be4231a 100644
--- a/math/atest-exp.c
+++ b/math/atest-exp.c
@@ -1,4 +1,4 @@
-/* Copyright (C) 1997, 1998, 2000, 2006 Free Software Foundation, Inc.
+/* Copyright (C) 1997, 1998, 2000 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
    Contributed by Geoffrey Keating <Geoff.Keating@anu.edu.au>, 1997.
 
@@ -171,10 +171,8 @@ main (void)
 
    memset (e2, '\0', sizeof (mp1));
    for (i = -1; i < 100 && i < FRAC / 4; i++)
-     e2[(FRAC - i * 4 - 4) / mpbpl] |= ((mp_limb_t) (strchr (hexdig,
-							     exp1[i + 1])
-						     - hexdig)
- 					<< (FRAC - i * 4 - 4) % mpbpl);
+     e2[(FRAC - i * 4 - 4) / mpbpl] |= ((strchr (hexdig, exp1[i + 1]) - hexdig)
+					<< (FRAC - i * 4 - 4) % mpbpl);
 
    if (mpn_cmp (ex, e2, SZ) >= 0)
      mpn_sub_n (e3, ex, e2, SZ);
diff --git a/math/atest-exp2.c b/math/atest-exp2.c
index 2c028a2b83..33d942fc61 100644
--- a/math/atest-exp2.c
+++ b/math/atest-exp2.c
@@ -1,4 +1,4 @@
-/* Copyright (C) 1997, 1998, 2000, 2006 Free Software Foundation, Inc.
+/* Copyright (C) 1997, 1998, 2000 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
    Contributed by Geoffrey Keating <Geoff.Keating@anu.edu.au>, 1997.
 
@@ -73,9 +73,8 @@ read_mpn_hex(mp_limb_t *x, const char *str)
 
   memset (x, 0, sizeof (mp1));
   for (i = -1; i < 100 && i < FRAC / 4; ++i)
-    x[(FRAC - i * 4 - 4) / mpbpl] |= ((mp_limb_t) (strchr (hexdig, str[i + 1])
-						   - hexdig)
- 				      << (FRAC - i * 4 - 4) % mpbpl);
+    x[(FRAC - i * 4 - 4) / mpbpl] |= ((strchr (hexdig, str[i + 1]) - hexdig)
+				      << (FRAC - i * 4 - 4) % mpbpl);
 }
 
 static mp_limb_t *get_log2(void) __attribute__((const));
diff --git a/math/atest-sincos.c b/math/atest-sincos.c
index bef3521c96..911aaec275 100644
--- a/math/atest-sincos.c
+++ b/math/atest-sincos.c
@@ -1,4 +1,4 @@
-/* Copyright (C) 1997, 1998, 2000, 2006 Free Software Foundation, Inc.
+/* Copyright (C) 1997, 1998, 2000 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
    Contributed by Geoffrey Keating <Geoff.Keating@anu.edu.au>, 1997.
 
@@ -239,11 +239,9 @@ main (void)
    memset (c2, 0, sizeof (mp1));
    for (i = 0; i < 100 && i < FRAC / 4; i++)
      {
-       s2[(FRAC - i * 4 - 4) / mpbpl] |= ((mp_limb_t) (strchr (hexdig, sin1[i])
-						       - hexdig)
- 					  << (FRAC - i * 4 - 4) % mpbpl);
-       c2[(FRAC - i * 4 - 4) / mpbpl] |= ((mp_limb_t) (strchr (hexdig, cos1[i])
-						       - hexdig)
+       s2[(FRAC - i * 4 - 4) / mpbpl] |= ((strchr (hexdig, sin1[i]) - hexdig)
+					  << (FRAC - i * 4 - 4) % mpbpl);
+       c2[(FRAC - i * 4 - 4) / mpbpl] |= ((strchr (hexdig, cos1[i]) - hexdig)
 					  << (FRAC - i * 4 - 4) % mpbpl);
      }
 
diff --git a/math/basic-test.c b/math/basic-test.c
index e42c014572..e48a3ae4e0 100644
--- a/math/basic-test.c
+++ b/math/basic-test.c
@@ -1,4 +1,4 @@
-/* Copyright (C) 1999 Free Software Foundation, Inc.
+/* Copyright (C) 1999, 2007 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
    Contributed by Andreas Jaeger <aj@suse.de>, 1999.
 
@@ -44,7 +44,7 @@ NAME (void)								      \
 									      \
   zero_var = 0.0;							      \
   one_var = 1.0;							      \
-  NaN_var = zero_var/zero_var;						      \
+  NaN_var = zero_var / zero_var;					      \
   Inf_var = one_var / zero_var;						      \
 									      \
   (void) &zero_var;							      \
@@ -103,21 +103,51 @@ NAME (void)								      \
   check (#FLOAT " isinf (-HUGE_VALx) == -1", isinf (x1) == -1);		      \
 }
 
+#define TEST_TRUNC(NAME, FLOAT, DOUBLE) \
+void									      \
+NAME (void)								      \
+{									      \
+  volatile DOUBLE Inf_var, NaN_var, zero_var, one_var;			      \
+  FLOAT x1, x2;								      \
+									      \
+  zero_var = 0.0;							      \
+  one_var = 1.0;							      \
+  NaN_var = zero_var / zero_var;					      \
+  Inf_var = one_var / zero_var;						      \
+									      \
+  (void) &NaN_var;							      \
+  (void) &Inf_var;							      \
+									      \
+  x1 = (FLOAT) NaN_var;							      \
+  check (" "#FLOAT" x = ("#FLOAT") ("#DOUBLE") NaN", isnan (x1) != 0);	      \
+  x2 = (FLOAT) Inf_var;							      \
+  check (" "#FLOAT" x = ("#FLOAT") ("#DOUBLE") Inf", isinf (x2) != 0);	      \
+}
+
 TEST_FUNC (float_test, float, nanf, FLT_EPSILON, HUGE_VALF)
 TEST_FUNC (double_test, double, nan, DBL_EPSILON, HUGE_VAL)
+TEST_TRUNC (truncdfsf_test, float, double)
 #ifndef NO_LONG_DOUBLE
 TEST_FUNC (ldouble_test, long double, nanl, LDBL_EPSILON, HUGE_VALL)
+TEST_TRUNC (trunctfsf_test, float, long double)
+TEST_TRUNC (trunctfdf_test, double, long double)
 #endif
 
 int
-main (void)
+do_test (void)
 {
   float_test ();
   double_test ();
+  truncdfsf_test();
 
 #ifndef NO_LONG_DOUBLE
   ldouble_test ();
+  trunctfsf_test();
+  trunctfdf_test();
 #endif
 
   return errors != 0;
 }
+
+#define TEST_FUNCTION do_test ()
+#include "../test-skeleton.c"
diff --git a/math/bug-nextafter.c b/math/bug-nextafter.c
index 2a967c75bf..1d21841ea6 100644
--- a/math/bug-nextafter.c
+++ b/math/bug-nextafter.c
@@ -4,6 +4,9 @@
 #include <stdlib.h>
 #include <stdio.h>
 
+float zero = 0.0;
+float inf = INFINITY;
+
 int
 main (void)
 {
@@ -34,6 +37,81 @@ main (void)
       ++result;
     }
 
+  i = 0;
+  m = FLT_MIN;
+  feclearexcept (FE_ALL_EXCEPT);
+  i = nextafterf (m, i);
+  if (i < 0 || i >= FLT_MIN)
+    {
+      puts ("nextafterf+ failed");
+      ++result;
+    }
+  if (fetestexcept (FE_UNDERFLOW) == 0)
+    {
+      puts ("nextafterf+ did not underflow");
+      ++result;
+    }
+  i = 0;
+  feclearexcept (FE_ALL_EXCEPT);
+  i = nextafterf (-m, -i);
+  if (i > 0 || i <= -FLT_MIN)
+    {
+      puts ("nextafterf- failed");
+      ++result;
+    }
+  if (fetestexcept (FE_UNDERFLOW) == 0)
+    {
+      puts ("nextafterf- did not underflow");
+      ++result;
+    }
+  i = -INFINITY;
+  feclearexcept (FE_ALL_EXCEPT);
+  m = nextafterf (zero, inf);
+  if (m < 0.0 || m >= FLT_MIN)
+    {
+      puts ("nextafterf+ failed");
+      ++result;
+    }
+  if (fetestexcept (FE_UNDERFLOW) == 0)
+    {
+      puts ("nextafterf+ did not underflow");
+      ++result;
+    }
+  feclearexcept (FE_ALL_EXCEPT);
+  if (nextafterf (m, i) != 0.0)
+    {
+      puts ("nextafterf+ failed");
+      ++result;
+    }
+  if (fetestexcept (FE_UNDERFLOW) == 0)
+    {
+      puts ("nextafterf+ did not underflow");
+      ++result;
+    }
+  feclearexcept (FE_ALL_EXCEPT);
+  m = nextafterf (copysignf (zero, -1.0), -inf);
+  if (m > 0.0 || m <= -FLT_MIN)
+    {
+      puts ("nextafterf- failed");
+      ++result;
+    }
+  if (fetestexcept (FE_UNDERFLOW) == 0)
+    {
+      puts ("nextafterf- did not underflow");
+      ++result;
+    }
+  feclearexcept (FE_ALL_EXCEPT);
+  if (nextafterf (m, -i) != 0.0)
+    {
+      puts ("nextafterf- failed");
+      ++result;
+    }
+  if (fetestexcept (FE_UNDERFLOW) == 0)
+    {
+      puts ("nextafterf- did not underflow");
+      ++result;
+    }
+
   double di = INFINITY;
   double dm = DBL_MAX;
   feclearexcept (FE_ALL_EXCEPT);
@@ -59,5 +137,182 @@ main (void)
       ++result;
     }
 
+  di = 0;
+  dm = DBL_MIN;
+  feclearexcept (FE_ALL_EXCEPT);
+  di = nextafter (dm, di);
+  if (di < 0 || di >= DBL_MIN)
+    {
+      puts ("nextafter+ failed");
+      ++result;
+    }
+  if (fetestexcept (FE_UNDERFLOW) == 0)
+    {
+      puts ("nextafter+ did not underflow");
+      ++result;
+    }
+  di = 0;
+  feclearexcept (FE_ALL_EXCEPT);
+  di = nextafter (-dm, -di);
+  if (di > 0 || di <= -DBL_MIN)
+    {
+      puts ("nextafter- failed");
+      ++result;
+    }
+  if (fetestexcept (FE_UNDERFLOW) == 0)
+    {
+      puts ("nextafter- did not underflow");
+      ++result;
+    }
+  di = -INFINITY;
+  feclearexcept (FE_ALL_EXCEPT);
+  dm = nextafter (zero, inf);
+  if (dm < 0.0 || dm >= DBL_MIN)
+    {
+      puts ("nextafter+ failed");
+      ++result;
+    }
+  if (fetestexcept (FE_UNDERFLOW) == 0)
+    {
+      puts ("nextafter+ did not underflow");
+      ++result;
+    }
+  feclearexcept (FE_ALL_EXCEPT);
+  if (nextafter (dm, di) != 0.0)
+    {
+      puts ("nextafter+ failed");
+      ++result;
+    }
+  if (fetestexcept (FE_UNDERFLOW) == 0)
+    {
+      puts ("nextafter+ did not underflow");
+      ++result;
+    }
+  feclearexcept (FE_ALL_EXCEPT);
+  dm = nextafter (copysign (zero, -1.0), -inf);
+  if (dm > 0.0 || dm <= -DBL_MIN)
+    {
+      puts ("nextafter- failed");
+      ++result;
+    }
+  if (fetestexcept (FE_UNDERFLOW) == 0)
+    {
+      puts ("nextafter- did not underflow");
+      ++result;
+    }
+  feclearexcept (FE_ALL_EXCEPT);
+  if (nextafter (dm, -di) != 0.0)
+    {
+      puts ("nextafter- failed");
+      ++result;
+    }
+  if (fetestexcept (FE_UNDERFLOW) == 0)
+    {
+      puts ("nextafter- did not underflow");
+      ++result;
+    }
+
+#ifndef NO_LONG_DOUBLE
+  long double li = INFINITY;
+  long double lm = LDBL_MAX;
+  feclearexcept (FE_ALL_EXCEPT);
+  if (nextafterl (lm, li) != li)
+    {
+      puts ("nextafterl+ failed");
+      ++result;
+    }
+  if (fetestexcept (FE_OVERFLOW) == 0)
+    {
+      puts ("nextafterl+ did not overflow");
+      ++result;
+    }
+  feclearexcept (FE_ALL_EXCEPT);
+  if (nextafterl (-lm, -li) != -li)
+    {
+      puts ("nextafterl failed");
+      ++result;
+    }
+  if (fetestexcept (FE_OVERFLOW) == 0)
+    {
+      puts ("nextafterl- did not overflow");
+      ++result;
+    }
+
+  li = 0;
+  lm = LDBL_MIN;
+  feclearexcept (FE_ALL_EXCEPT);
+  li = nextafterl (lm, li);
+  if (li < 0 || li >= LDBL_MIN)
+    {
+      puts ("nextafterl+ failed");
+      ++result;
+    }
+  if (fetestexcept (FE_UNDERFLOW) == 0)
+    {
+      puts ("nextafterl+ did not underflow");
+      ++result;
+    }
+  li = 0;
+  feclearexcept (FE_ALL_EXCEPT);
+  li = nextafterl (-lm, -li);
+  if (li > 0 || li <= -LDBL_MIN)
+    {
+      puts ("nextafterl- failed");
+      ++result;
+    }
+  if (fetestexcept (FE_UNDERFLOW) == 0)
+    {
+      puts ("nextafterl- did not underflow");
+      ++result;
+    }
+  li = -INFINITY;
+  feclearexcept (FE_ALL_EXCEPT);
+  lm = nextafterl (zero, inf);
+  if (lm < 0.0 || lm >= LDBL_MIN)
+    {
+      puts ("nextafterl+ failed");
+      ++result;
+    }
+  if (fetestexcept (FE_UNDERFLOW) == 0)
+    {
+      puts ("nextafterl+ did not underflow");
+      ++result;
+    }
+  feclearexcept (FE_ALL_EXCEPT);
+  if (nextafterl (lm, li) != 0.0)
+    {
+      puts ("nextafterl+ failed");
+      ++result;
+    }
+  if (fetestexcept (FE_UNDERFLOW) == 0)
+    {
+      puts ("nextafterl+ did not underflow");
+      ++result;
+    }
+  feclearexcept (FE_ALL_EXCEPT);
+  lm = nextafterl (copysign (zero, -1.0), -inf);
+  if (lm > 0.0 || lm <= -LDBL_MIN)
+    {
+      puts ("nextafterl- failed");
+      ++result;
+    }
+  if (fetestexcept (FE_UNDERFLOW) == 0)
+    {
+      puts ("nextafterl- did not underflow");
+      ++result;
+    }
+  feclearexcept (FE_ALL_EXCEPT);
+  if (nextafterl (lm, -li) != 0.0)
+    {
+      puts ("nextafterl- failed");
+      ++result;
+    }
+  if (fetestexcept (FE_UNDERFLOW) == 0)
+    {
+      puts ("nextafterl- did not underflow");
+      ++result;
+    }
+#endif
+
   return result;
 }
diff --git a/math/bug-nexttoward.c b/math/bug-nexttoward.c
index e306a129c2..ff57e5e3f5 100644
--- a/math/bug-nexttoward.c
+++ b/math/bug-nexttoward.c
@@ -4,6 +4,9 @@
 #include <stdlib.h>
 #include <stdio.h>
 
+float zero = 0.0;
+float inf = INFINITY;
+
 int
 main (void)
 {
@@ -35,6 +38,81 @@ main (void)
       ++result;
     }
 
+  fi = 0;
+  m = FLT_MIN;
+  feclearexcept (FE_ALL_EXCEPT);
+  fi = nexttowardf (m, fi);
+  if (fi < 0 || fi >= FLT_MIN)
+    {
+      puts ("nexttowardf+ failed");
+      ++result;
+    }
+  if (fetestexcept (FE_UNDERFLOW) == 0)
+    {
+      puts ("nexttowardf+ did not underflow");
+      ++result;
+    }
+  fi = 0;
+  feclearexcept (FE_ALL_EXCEPT);
+  fi = nexttowardf (-m, -fi);
+  if (fi > 0 || fi <= -FLT_MIN)
+    {
+      puts ("nexttowardf- failed");
+      ++result;
+    }
+  if (fetestexcept (FE_UNDERFLOW) == 0)
+    {
+      puts ("nexttowardf- did not underflow");
+      ++result;
+    }
+  fi = -INFINITY;
+  feclearexcept (FE_ALL_EXCEPT);
+  m = nexttowardf (zero, inf);
+  if (m < 0.0 || m >= FLT_MIN)
+    {
+      puts ("nexttowardf+ failed");
+      ++result;
+    }
+  if (fetestexcept (FE_UNDERFLOW) == 0)
+    {
+      puts ("nexttowardf+ did not underflow");
+      ++result;
+    }
+  feclearexcept (FE_ALL_EXCEPT);
+  if (nexttowardf (m, fi) != 0.0)
+    {
+      puts ("nexttowardf+ failed");
+      ++result;
+    }
+  if (fetestexcept (FE_UNDERFLOW) == 0)
+    {
+      puts ("nexttowardf+ did not underflow");
+      ++result;
+    }
+  feclearexcept (FE_ALL_EXCEPT);
+  m = nexttowardf (copysignf (zero, -1.0), -inf);
+  if (m > 0.0 || m <= -FLT_MIN)
+    {
+      puts ("nexttowardf- failed");
+      ++result;
+    }
+  if (fetestexcept (FE_UNDERFLOW) == 0)
+    {
+      puts ("nexttowardf- did not underflow");
+      ++result;
+    }
+  feclearexcept (FE_ALL_EXCEPT);
+  if (nexttowardf (m, -fi) != 0.0)
+    {
+      puts ("nexttowardf- failed");
+      ++result;
+    }
+  if (fetestexcept (FE_UNDERFLOW) == 0)
+    {
+      puts ("nexttowardf- did not underflow");
+      ++result;
+    }
+
   tl = (long double) DBL_MAX + 1.0e305L;
   double di = INFINITY;
   double dm = DBL_MAX;
@@ -61,5 +139,182 @@ main (void)
       ++result;
     }
 
+  di = 0;
+  dm = DBL_MIN;
+  feclearexcept (FE_ALL_EXCEPT);
+  di = nexttoward (dm, di);
+  if (di < 0 || di >= DBL_MIN)
+    {
+      puts ("nexttoward+ failed");
+      ++result;
+    }
+  if (fetestexcept (FE_UNDERFLOW) == 0)
+    {
+      puts ("nexttoward+ did not underflow");
+      ++result;
+    }
+  di = 0;
+  feclearexcept (FE_ALL_EXCEPT);
+  di = nexttoward (-dm, -di);
+  if (di > 0 || di <= -DBL_MIN)
+    {
+      puts ("nexttoward- failed");
+      ++result;
+    }
+  if (fetestexcept (FE_UNDERFLOW) == 0)
+    {
+      puts ("nexttoward- did not underflow");
+      ++result;
+    }
+  di = -INFINITY;
+  feclearexcept (FE_ALL_EXCEPT);
+  dm = nexttoward (zero, inf);
+  if (dm < 0.0 || dm >= DBL_MIN)
+    {
+      puts ("nexttoward+ failed");
+      ++result;
+    }
+  if (fetestexcept (FE_UNDERFLOW) == 0)
+    {
+      puts ("nexttoward+ did not underflow");
+      ++result;
+    }
+  feclearexcept (FE_ALL_EXCEPT);
+  if (nexttoward (dm, di) != 0.0)
+    {
+      puts ("nexttoward+ failed");
+      ++result;
+    }
+  if (fetestexcept (FE_UNDERFLOW) == 0)
+    {
+      puts ("nexttoward+ did not underflow");
+      ++result;
+    }
+  feclearexcept (FE_ALL_EXCEPT);
+  dm = nexttoward (copysign (zero, -1.0), -inf);
+  if (dm > 0.0 || dm <= -DBL_MIN)
+    {
+      puts ("nexttoward- failed");
+      ++result;
+    }
+  if (fetestexcept (FE_UNDERFLOW) == 0)
+    {
+      puts ("nexttoward- did not underflow");
+      ++result;
+    }
+  feclearexcept (FE_ALL_EXCEPT);
+  if (nexttoward (dm, -di) != 0.0)
+    {
+      puts ("nexttoward- failed");
+      ++result;
+    }
+  if (fetestexcept (FE_UNDERFLOW) == 0)
+    {
+      puts ("nexttoward- did not underflow");
+      ++result;
+    }
+
+#ifndef NO_LONG_DOUBLE
+  long double li = INFINITY;
+  long double lm = LDBL_MAX;
+  feclearexcept (FE_ALL_EXCEPT);
+  if (nexttowardl (lm, li) != li)
+    {
+      puts ("nexttowardl+ failed");
+      ++result;
+    }
+  if (fetestexcept (FE_OVERFLOW) == 0)
+    {
+      puts ("nexttowardl+ did not overflow");
+      ++result;
+    }
+  feclearexcept (FE_ALL_EXCEPT);
+  if (nexttowardl (-lm, -li) != -li)
+    {
+      puts ("nexttowardl failed");
+      ++result;
+    }
+  if (fetestexcept (FE_OVERFLOW) == 0)
+    {
+      puts ("nexttowardl- did not overflow");
+      ++result;
+    }
+
+  li = 0;
+  lm = LDBL_MIN;
+  feclearexcept (FE_ALL_EXCEPT);
+  li = nexttowardl (lm, li);
+  if (li < 0 || li >= LDBL_MIN)
+    {
+      puts ("nexttowardl+ failed");
+      ++result;
+    }
+  if (fetestexcept (FE_UNDERFLOW) == 0)
+    {
+      puts ("nexttowardl+ did not underflow");
+      ++result;
+    }
+  li = 0;
+  feclearexcept (FE_ALL_EXCEPT);
+  li = nexttowardl (-lm, -li);
+  if (li > 0 || li <= -LDBL_MIN)
+    {
+      puts ("nexttowardl- failed");
+      ++result;
+    }
+  if (fetestexcept (FE_UNDERFLOW) == 0)
+    {
+      puts ("nexttowardl- did not underflow");
+      ++result;
+    }
+  li = -INFINITY;
+  feclearexcept (FE_ALL_EXCEPT);
+  lm = nexttowardl (zero, inf);
+  if (lm < 0.0 || lm >= LDBL_MIN)
+    {
+      puts ("nexttowardl+ failed");
+      ++result;
+    }
+  if (fetestexcept (FE_UNDERFLOW) == 0)
+    {
+      puts ("nexttowardl+ did not underflow");
+      ++result;
+    }
+  feclearexcept (FE_ALL_EXCEPT);
+  if (nexttowardl (lm, li) != 0.0)
+    {
+      puts ("nexttowardl+ failed");
+      ++result;
+    }
+  if (fetestexcept (FE_UNDERFLOW) == 0)
+    {
+      puts ("nexttowardl+ did not underflow");
+      ++result;
+    }
+  feclearexcept (FE_ALL_EXCEPT);
+  lm = nexttowardl (copysign (zero, -1.0), -inf);
+  if (lm > 0.0 || lm <= -LDBL_MIN)
+    {
+      puts ("nexttowardl- failed");
+      ++result;
+    }
+  if (fetestexcept (FE_UNDERFLOW) == 0)
+    {
+      puts ("nexttowardl- did not underflow");
+      ++result;
+    }
+  feclearexcept (FE_ALL_EXCEPT);
+  if (nexttowardl (lm, -li) != 0.0)
+    {
+      puts ("nexttowardl- failed");
+      ++result;
+    }
+  if (fetestexcept (FE_UNDERFLOW) == 0)
+    {
+      puts ("nexttowardl- did not underflow");
+      ++result;
+    }
+#endif
+
   return result;
 }
diff --git a/math/libm-test.inc b/math/libm-test.inc
index 23ee6beaa8..81dd364f77 100644
--- a/math/libm-test.inc
+++ b/math/libm-test.inc
@@ -4127,7 +4127,9 @@ log_test (void)
   TEST_f_f (log, 1, 0);
 
   TEST_f_f (log, -1, nan_value, INVALID_EXCEPTION);
+  TEST_f_f (log, minus_infty, nan_value, INVALID_EXCEPTION);
   TEST_f_f (log, plus_infty, plus_infty);
+  TEST_f_f (log, nan_value, nan_value);
 
   TEST_f_f (log, M_El, 1);
   TEST_f_f (log, 1.0 / M_El, -1);
@@ -4157,6 +4159,7 @@ log10_test (void)
 
   /* log10 (x) == NaN plus invalid exception if x < 0.  */
   TEST_f_f (log10, -1, nan_value, INVALID_EXCEPTION);
+  TEST_f_f (log10, minus_infty, nan_value, INVALID_EXCEPTION);