Set errno for log1p on pole/domain error.

According to bug 6792, errno is not set to ERANGE/EDOM
by calling log1p/log1pf/log1pl with x = -1 or x < -1.

This patch adds a wrapper which sets errno in those cases
and returns the value of the existing __log1p function.
The log1p is now an alias to the wrapper function
instead of __log1p.

The files in sysdeps are reflecting these changes.
The ia64 implementation sets errno by itself,
thus the wrapper-file is empty.

The libm-test is adjusted for log1p-tests to check errno.

	[BZ #6792]
	* math/w_log1p.c: New file.
	* math/w_log1pf.c: Likewise.
	* math/w_log1pl.c: Likewise.
	* math/Makefile (libm-calls): Add w_log1p.
	* math/s_log1pl.c (log1pl): Remove weak_alias.
	* sysdeps/i386/fpu/s_log1p.S (log1p): Likewise.
	* sysdeps/i386/fpu/s_log1pf.S (log1pf): Likewise.
	* sysdeps/i386/fpu/s_log1pl.S (log1pl): Likewise.
	* sysdeps/x86_64/fpu/s_log1pl.S (log1pl): Likewise.
	* sysdeps/ieee754/dbl-64/s_log1p.c (log1p): Likewise.
	[NO_LONG_DOUBLE] (log1pl): Likewise.
	* sysdeps/ieee754/flt-32/s_log1pf.c (log1pf): Likewise.
	* sysdeps/ieee754/ldbl-128/s_log1pl.c (log1pl): Likewise.
	* sysdeps/ieee754/ldbl-64-128/s_log1pl.c
	(log1p): Remove long_double_symbol.
	* sysdeps/ieee754/ldbl-128ibm/s_log1pl.c (log1pl): Likewise.
	* sysdeps/ieee754/ldbl-64-128/w_log1pl.c: New file.
	* sysdeps/ieee754/ldbl-128ibm/w_log1pl.c: Likewise.
	* sysdeps/m68k/m680x0/fpu/s_log1p.c: Define empty weak_alias to
	remove weak_alias for corresponding log1p function.
	* sysdeps/m68k/m680x0/fpu/s_log1pf.c: Likewise.
	* sysdeps/m68k/m680x0/fpu/s_log1pl.c: Likewise.
	* sysdeps/ia64/fpu/w_log1p.c: New file.
	* sysdeps/ia64/fpu/w_log1pf.c: Likewise.
	* sysdeps/ia64/fpu/w_log1pl.c: Likewise.
	* math/libm-test.inc (log1p_test_data):	Add errno expectations.

7 files changed, 46 insertions, 13 deletions

diff --git a/sysdeps/ieee754/dbl-64/s_log1p.c b/sysdeps/ieee754/dbl-64/s_log1p.c
index c922148..86bbfba 100644
--- a/sysdeps/ieee754/dbl-64/s_log1p.c
+++ b/sysdeps/ieee754/dbl-64/s_log1p.c
@@ -189,8 +189,3 @@ __log1p (double x)
   else
     return k * ln2_hi - ((hfsq - (s * (hfsq + R) + (k * ln2_lo + c))) - f);
 }
-weak_alias (__log1p, log1p)
-#ifdef NO_LONG_DOUBLE
-strong_alias (__log1p, __log1pl)
-weak_alias (__log1p, log1pl)
-#endif
diff --git a/sysdeps/ieee754/flt-32/s_log1pf.c b/sysdeps/ieee754/flt-32/s_log1pf.c
index 5f00feb..94c33fc 100644
--- a/sysdeps/ieee754/flt-32/s_log1pf.c
+++ b/sysdeps/ieee754/flt-32/s_log1pf.c
@@ -96,4 +96,3 @@ __log1pf(float x)
 	if(k==0) return f-(hfsq-s*(hfsq+R)); else
 		 return k*ln2_hi-((hfsq-(s*(hfsq+R)+(k*ln2_lo+c)))-f);
 }
-weak_alias (__log1pf, log1pf)
diff --git a/sysdeps/ieee754/ldbl-128/s_log1pl.c b/sysdeps/ieee754/ldbl-128/s_log1pl.c
index 4a30af6..b70a55b 100644
--- a/sysdeps/ieee754/ldbl-128/s_log1pl.c
+++ b/sysdeps/ieee754/ldbl-128/s_log1pl.c
@@ -253,5 +253,3 @@ __log1pl (long double xm1)
   z = z + e * C1;
   return (z);
 }
-
-weak_alias (__log1pl, log1pl)
diff --git a/sysdeps/ieee754/ldbl-128ibm/s_log1pl.c b/sysdeps/ieee754/ldbl-128ibm/s_log1pl.c
index e4bb6e8..a0e24d7 100644
--- a/sysdeps/ieee754/ldbl-128ibm/s_log1pl.c
+++ b/sysdeps/ieee754/ldbl-128ibm/s_log1pl.c
@@ -249,5 +249,3 @@ __log1pl (long double xm1)
   z = z + e * C1;
   return (z);
 }
-
-long_double_symbol (libm, __log1pl, log1pl);
diff --git a/sysdeps/ieee754/ldbl-128ibm/w_log1pl.c b/sysdeps/ieee754/ldbl-128ibm/w_log1pl.c
new file mode 100644
index 0000000..279a62a
--- /dev/null
+++ b/sysdeps/ieee754/ldbl-128ibm/w_log1pl.c
@@ -0,0 +1,23 @@
+/* Wrapper for __log1pl that handles setting errno.
+   Copyright (C) 2015 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 of the License, or (at your option) any later version.
+
+   The GNU C Library 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
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library; if not, see
+   <http://www.gnu.org/licenses/>.  */
+
+#include <math_ldbl_opt.h>
+#undef weak_alias
+#define weak_alias(n,a)
+#include <math/w_log1pl.c>
+long_double_symbol (libm, __w_log1pl, log1pl);
diff --git a/sysdeps/ieee754/ldbl-64-128/s_log1pl.c b/sysdeps/ieee754/ldbl-64-128/s_log1pl.c
index eebd636..11d56bf 100644
--- a/sysdeps/ieee754/ldbl-64-128/s_log1pl.c
+++ b/sysdeps/ieee754/ldbl-64-128/s_log1pl.c
@@ -1,5 +1,2 @@
 #include <math_ldbl_opt.h>
-#undef weak_alias
-#define weak_alias(n,a)
 #include <sysdeps/ieee754/ldbl-128/s_log1pl.c>
-long_double_symbol (libm, __log1pl, log1pl);
diff --git a/sysdeps/ieee754/ldbl-64-128/w_log1pl.c b/sysdeps/ieee754/ldbl-64-128/w_log1pl.c
new file mode 100644
index 0000000..279a62a
--- /dev/null
+++ b/sysdeps/ieee754/ldbl-64-128/w_log1pl.c
@@ -0,0 +1,23 @@
+/* Wrapper for __log1pl that handles setting errno.
+   Copyright (C) 2015 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 of the License, or (at your option) any later version.
+
+   The GNU C Library 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
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library; if not, see
+   <http://www.gnu.org/licenses/>.  */
+
+#include <math_ldbl_opt.h>
+#undef weak_alias
+#define weak_alias(n,a)
+#include <math/w_log1pl.c>
+long_double_symbol (libm, __w_log1pl, log1pl);