Make scalbn set errno (bug 6803).

As noted in bug 6803, scalbn fails to set errno on overflow and
underflow.  This patch fixes this by making scalbn an alias of ldexp,
which has exactly the same semantics (for floating-point types with
radix 2) and already has wrappers that deal with setting errno,
instead of an alias of the internal __scalbn (which ldexp calls).

Notes:

* Where compat symbols were defined for scalbn functions, I didn't
  change what they point to (to keep the patch minimal), so such
  compat symbols continue to go directly to the non-errno-setting
  functions.

* Mike, I didn't do anything with the IA64 versions of these
  functions, where I think both the ldexp and scalbn functions already
  deal with setting errno.  As a cleanup (not needed to fix this bug)
  however you might want to make those functions into aliases for
  IA64; there is no need for them to be separate function
  implementations at all.

* This concludes the fix for bug 6803 since the scalb and scalbln
  cases of that bug were fixed some time ago.

Tested for x86_64, x86, mips64 and powerpc.

	[BZ #6803]
	* math/s_ldexp.c (scalbn): Define as weak alias of __ldexp.
	[NO_LONG_DOUBLE] (scalbnl): Define as weak alias of __ldexp.
	* math/s_ldexpf.c (scalbnf): Define as weak alias of __ldexpf.
	* math/s_ldexpl.c (scalbnl): Define as weak alias of __ldexpl.
	* sysdeps/i386/fpu/s_scalbn.S (scalbn): Remove alias.
	* sysdeps/i386/fpu/s_scalbnf.S (scalbnf): Likewise.
	* sysdeps/i386/fpu/s_scalbnl.S (scalbnl): Likewise.
	* sysdeps/ieee754/dbl-64/s_scalbn.c (scalbn): Likewise.
	[NO_LONG_DOUBLE] (scalbnl): Likewise.
	* sysdeps/ieee754/dbl-64/wordsize-64/s_scalbn.c (scalbn):
	Likewise.
	[NO_LONG_DOUBLE] (scalbnl): Likewise.
	* sysdeps/ieee754/flt-32/s_scalbnf.c (scalbnf): Likewise.
	* sysdeps/ieee754/ldbl-128/s_scalbnl.c (scalbnl): Likewise.
	* sysdeps/ieee754/ldbl-128ibm/s_scalbnl.c (scalbnl): Remove
	long_double_symbol calls.
	* sysdeps/ieee754/ldbl-64-128/s_scalbnl.c (scalbnl): Likewise.
	* sysdeps/ieee754/ldbl-opt/s_ldexpl.c (__ldexpl_2): Define as
	strong alias of __ldexpl.
	(scalbnl): Define using long_double_symbol.
	* sysdeps/m68k/m680x0/fpu/s_scalbn.c (__CONCATX(scalbn,suffix)):
	Remove alias.
	* sysdeps/sparc/sparc64/soft-fp/s_scalbnl.c (scalbnl): Likewise.
	* sysdeps/x86_64/fpu/s_scalbnl.S (scalbnl): Likewise.
	* math/libm-test.inc (scalbn_test_data): Add errno expectations.
	(scalbln_test_data): Add more errno expectations.

19 files changed, 116 insertions, 102 deletions

diff --git a/ChangeLog b/ChangeLog
index e9cc796..7751dfa 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,33 @@
+2015-09-16  Joseph Myers  <joseph@codesourcery.com>
+
+	[BZ #6803]
+	* math/s_ldexp.c (scalbn): Define as weak alias of __ldexp.
+	[NO_LONG_DOUBLE] (scalbnl): Define as weak alias of __ldexp.
+	* math/s_ldexpf.c (scalbnf): Define as weak alias of __ldexpf.
+	* math/s_ldexpl.c (scalbnl): Define as weak alias of __ldexpl.
+	* sysdeps/i386/fpu/s_scalbn.S (scalbn): Remove alias.
+	* sysdeps/i386/fpu/s_scalbnf.S (scalbnf): Likewise.
+	* sysdeps/i386/fpu/s_scalbnl.S (scalbnl): Likewise.
+	* sysdeps/ieee754/dbl-64/s_scalbn.c (scalbn): Likewise.
+	[NO_LONG_DOUBLE] (scalbnl): Likewise.
+	* sysdeps/ieee754/dbl-64/wordsize-64/s_scalbn.c (scalbn):
+	Likewise.
+	[NO_LONG_DOUBLE] (scalbnl): Likewise.
+	* sysdeps/ieee754/flt-32/s_scalbnf.c (scalbnf): Likewise.
+	* sysdeps/ieee754/ldbl-128/s_scalbnl.c (scalbnl): Likewise.
+	* sysdeps/ieee754/ldbl-128ibm/s_scalbnl.c (scalbnl): Remove
+	long_double_symbol calls.
+	* sysdeps/ieee754/ldbl-64-128/s_scalbnl.c (scalbnl): Likewise.
+	* sysdeps/ieee754/ldbl-opt/s_ldexpl.c (__ldexpl_2): Define as
+	strong alias of __ldexpl.
+	(scalbnl): Define using long_double_symbol.
+	* sysdeps/m68k/m680x0/fpu/s_scalbn.c (__CONCATX(scalbn,suffix)):
+	Remove alias.
+	* sysdeps/sparc/sparc64/soft-fp/s_scalbnl.c (scalbnl): Likewise.
+	* sysdeps/x86_64/fpu/s_scalbnl.S (scalbnl): Likewise.
+	* math/libm-test.inc (scalbn_test_data): Add errno expectations.
+	(scalbln_test_data): Add more errno expectations.
+
 2015-09-16  Justus Winter  <4winter@informatik.uni-hamburg.de>
 
 	Cache the host port like we cache the task port.  This way we do not
diff --git a/NEWS b/NEWS
index 61caf30..7d3955c 100644
--- a/NEWS
+++ b/NEWS
@@ -9,13 +9,13 @@ Version 2.23
 
 * The following bugs are resolved with this release:
 
-  2542, 2543, 2558, 2898, 4404, 14341, 14912, 15786, 15918, 16141, 16296,
-  16415, 16517, 16519, 16520, 16521, 16734, 16973, 16985, 17243, 17244,
-  17787, 17905, 18084, 18086, 18240, 18265, 18370, 18421, 18480, 18525,
-  18595, 18610, 18618, 18647, 18661, 18674, 18675, 18681, 18757, 18778,
-  18781, 18787, 18789, 18790, 18795, 18796, 18820, 18823, 18824, 18857,
-  18863, 18870, 18872, 18873, 18875, 18887, 18921, 18952, 18961, 18966,
-  18967.
+  2542, 2543, 2558, 2898, 4404, 6803, 14341, 14912, 15786, 15918, 16141,
+  16296, 16415, 16517, 16519, 16520, 16521, 16734, 16973, 16985, 17243,
+  17244, 17787, 17905, 18084, 18086, 18240, 18265, 18370, 18421, 18480,
+  18525, 18595, 18610, 18618, 18647, 18661, 18674, 18675, 18681, 18757,
+  18778, 18781, 18787, 18789, 18790, 18795, 18796, 18820, 18823, 18824,
+  18857, 18863, 18870, 18872, 18873, 18875, 18887, 18921, 18952, 18961,
+  18966, 18967.
 
 * The obsolete header <regexp.h> has been removed.  Programs that require
   this header must be updated to use <regex.h> instead.
diff --git a/math/libm-test.inc b/math/libm-test.inc
index 17a20c4..5594b9d 100644
--- a/math/libm-test.inc
+++ b/math/libm-test.inc
@@ -9175,65 +9175,65 @@ scalb_test (void)
 
 static const struct test_fi_f_data scalbn_test_data[] =
   {
-    TEST_fi_f (scalbn, 0, 0, 0, NO_INEXACT_EXCEPTION),
-    TEST_fi_f (scalbn, minus_zero, 0, minus_zero, NO_INEXACT_EXCEPTION),
-
-    TEST_fi_f (scalbn, plus_infty, 1, plus_infty, NO_INEXACT_EXCEPTION),
-    TEST_fi_f (scalbn, minus_infty, 1, minus_infty, NO_INEXACT_EXCEPTION),
-    TEST_fi_f (scalbn, qnan_value, 1, qnan_value, NO_INEXACT_EXCEPTION),
-
-    TEST_fi_f (scalbn, 0.8L, 4, 12.8L, NO_INEXACT_EXCEPTION),
-    TEST_fi_f (scalbn, -0.854375L, 5, -27.34L, NO_INEXACT_EXCEPTION),
-
-    TEST_fi_f (scalbn, 1, 0L, 1, NO_INEXACT_EXCEPTION),
-
-    TEST_fi_f (scalbn, min_value / 2, 0, min_value / 2, NO_INEXACT_EXCEPTION),
-    TEST_fi_f (scalbn, -min_value / 2, 0, -min_value / 2, NO_INEXACT_EXCEPTION),
-    TEST_fi_f (scalbn, min_value / 2, 1, min_value, NO_INEXACT_EXCEPTION),
-    TEST_fi_f (scalbn, -min_value / 2, 1, -min_value, NO_INEXACT_EXCEPTION),
-    TEST_fi_f (scalbn, min_value * 0x0.ffffp0, 0, min_value * 0x0.ffffp0, NO_INEXACT_EXCEPTION),
-    TEST_fi_f (scalbn, -min_value * 0x0.ffffp0, 0, -min_value * 0x0.ffffp0, NO_INEXACT_EXCEPTION),
-    TEST_fi_f (scalbn, min_subnorm_value, 0, min_subnorm_value, NO_INEXACT_EXCEPTION),
-    TEST_fi_f (scalbn, -min_subnorm_value, 0, -min_subnorm_value, NO_INEXACT_EXCEPTION),
-    TEST_fi_f (scalbn, min_subnorm_value, MANT_DIG, min_value, NO_INEXACT_EXCEPTION),
-    TEST_fi_f (scalbn, -min_subnorm_value, MANT_DIG, -min_value, NO_INEXACT_EXCEPTION),
-
-    TEST_fi_f (scalbn, min_value, -MANT_DIG, min_subnorm_value, NO_INEXACT_EXCEPTION),
-    TEST_fi_f (scalbn, -min_value, -MANT_DIG, -min_subnorm_value, NO_INEXACT_EXCEPTION),
-    TEST_fi_f (scalbn, min_value, -MANT_DIG-1, plus_uflow, INEXACT_EXCEPTION|UNDERFLOW_EXCEPTION),
-    TEST_fi_f (scalbn, -min_value, -MANT_DIG-1, minus_uflow, INEXACT_EXCEPTION|UNDERFLOW_EXCEPTION),
-    TEST_fi_f (scalbn, min_value, -MANT_DIG-2, plus_uflow, INEXACT_EXCEPTION|UNDERFLOW_EXCEPTION),
-    TEST_fi_f (scalbn, -min_value, -MANT_DIG-2, minus_uflow, INEXACT_EXCEPTION|UNDERFLOW_EXCEPTION),
+    TEST_fi_f (scalbn, 0, 0, 0, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
+    TEST_fi_f (scalbn, minus_zero, 0, minus_zero, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
+
+    TEST_fi_f (scalbn, plus_infty, 1, plus_infty, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
+    TEST_fi_f (scalbn, minus_infty, 1, minus_infty, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
+    TEST_fi_f (scalbn, qnan_value, 1, qnan_value, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
+
+    TEST_fi_f (scalbn, 0.8L, 4, 12.8L, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
+    TEST_fi_f (scalbn, -0.854375L, 5, -27.34L, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
+
+    TEST_fi_f (scalbn, 1, 0L, 1, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
+
+    TEST_fi_f (scalbn, min_value / 2, 0, min_value / 2, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
+    TEST_fi_f (scalbn, -min_value / 2, 0, -min_value / 2, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
+    TEST_fi_f (scalbn, min_value / 2, 1, min_value, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
+    TEST_fi_f (scalbn, -min_value / 2, 1, -min_value, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
+    TEST_fi_f (scalbn, min_value * 0x0.ffffp0, 0, min_value * 0x0.ffffp0, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
+    TEST_fi_f (scalbn, -min_value * 0x0.ffffp0, 0, -min_value * 0x0.ffffp0, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
+    TEST_fi_f (scalbn, min_subnorm_value, 0, min_subnorm_value, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
+    TEST_fi_f (scalbn, -min_subnorm_value, 0, -min_subnorm_value, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
+    TEST_fi_f (scalbn, min_subnorm_value, MANT_DIG, min_value, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
+    TEST_fi_f (scalbn, -min_subnorm_value, MANT_DIG, -min_value, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
+
+    TEST_fi_f (scalbn, min_value, -MANT_DIG, min_subnorm_value, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
+    TEST_fi_f (scalbn, -min_value, -MANT_DIG, -min_subnorm_value, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
+    TEST_fi_f (scalbn, min_value, -MANT_DIG-1, plus_uflow, INEXACT_EXCEPTION|UNDERFLOW_EXCEPTION|ERRNO_PLUS_UFLOW),
+    TEST_fi_f (scalbn, -min_value, -MANT_DIG-1, minus_uflow, INEXACT_EXCEPTION|UNDERFLOW_EXCEPTION|ERRNO_MINUS_UFLOW),
+    TEST_fi_f (scalbn, min_value, -MANT_DIG-2, plus_uflow, INEXACT_EXCEPTION|UNDERFLOW_EXCEPTION|ERRNO_PLUS_UFLOW),
+    TEST_fi_f (scalbn, -min_value, -MANT_DIG-2, minus_uflow, INEXACT_EXCEPTION|UNDERFLOW_EXCEPTION|ERRNO_MINUS_UFLOW),
     TEST_fi_f (scalbn, min_value * 1.5, -MANT_DIG, min_subnorm_value, INEXACT_EXCEPTION|UNDERFLOW_EXCEPTION, min_subnorm_value * 2, INEXACT_EXCEPTION|UNDERFLOW_EXCEPTION, min_subnorm_value, INEXACT_EXCEPTION|UNDERFLOW_EXCEPTION, min_subnorm_value * 2, INEXACT_EXCEPTION|UNDERFLOW_EXCEPTION),
     TEST_fi_f (scalbn, -min_value * 1.5, -MANT_DIG, -min_subnorm_value * 2, INEXACT_EXCEPTION|UNDERFLOW_EXCEPTION, -min_subnorm_value * 2, INEXACT_EXCEPTION|UNDERFLOW_EXCEPTION, -min_subnorm_value, INEXACT_EXCEPTION|UNDERFLOW_EXCEPTION, -min_subnorm_value, INEXACT_EXCEPTION|UNDERFLOW_EXCEPTION),
     TEST_fi_f (scalbn, min_value * 1.5, -MANT_DIG-1, plus_zero, INEXACT_EXCEPTION|UNDERFLOW_EXCEPTION, min_subnorm_value, INEXACT_EXCEPTION|UNDERFLOW_EXCEPTION, plus_zero, INEXACT_EXCEPTION|UNDERFLOW_EXCEPTION, min_subnorm_value, INEXACT_EXCEPTION|UNDERFLOW_EXCEPTION),
     TEST_fi_f (scalbn, -min_value * 1.5, -MANT_DIG-1, -min_subnorm_value, INEXACT_EXCEPTION|UNDERFLOW_EXCEPTION, -min_subnorm_value, INEXACT_EXCEPTION|UNDERFLOW_EXCEPTION, minus_zero, INEXACT_EXCEPTION|UNDERFLOW_EXCEPTION, minus_zero, INEXACT_EXCEPTION|UNDERFLOW_EXCEPTION),
-    TEST_fi_f (scalbn, min_value * 1.5, -MANT_DIG-2, plus_uflow, INEXACT_EXCEPTION|UNDERFLOW_EXCEPTION),
-    TEST_fi_f (scalbn, -min_value * 1.5, -MANT_DIG-2, minus_uflow, INEXACT_EXCEPTION|UNDERFLOW_EXCEPTION),
+    TEST_fi_f (scalbn, min_value * 1.5, -MANT_DIG-2, plus_uflow, INEXACT_EXCEPTION|UNDERFLOW_EXCEPTION|ERRNO_PLUS_UFLOW),
+    TEST_fi_f (scalbn, -min_value * 1.5, -MANT_DIG-2, minus_uflow, INEXACT_EXCEPTION|UNDERFLOW_EXCEPTION|ERRNO_MINUS_UFLOW),
     TEST_fi_f (scalbn, min_value * 1.25, -MANT_DIG, min_subnorm_value, INEXACT_EXCEPTION|UNDERFLOW_EXCEPTION, min_subnorm_value, INEXACT_EXCEPTION|UNDERFLOW_EXCEPTION, min_subnorm_value, INEXACT_EXCEPTION|UNDERFLOW_EXCEPTION, min_subnorm_value * 2, INEXACT_EXCEPTION|UNDERFLOW_EXCEPTION),
     TEST_fi_f (scalbn, -min_value * 1.25, -MANT_DIG, -min_subnorm_value * 2, INEXACT_EXCEPTION|UNDERFLOW_EXCEPTION, -min_subnorm_value, INEXACT_EXCEPTION|UNDERFLOW_EXCEPTION, -min_subnorm_value, INEXACT_EXCEPTION|UNDERFLOW_EXCEPTION, -min_subnorm_value, INEXACT_EXCEPTION|UNDERFLOW_EXCEPTION),
     TEST_fi_f (scalbn, min_value * 1.25, -MANT_DIG-1, plus_zero, INEXACT_EXCEPTION|UNDERFLOW_EXCEPTION, min_subnorm_value, INEXACT_EXCEPTION|UNDERFLOW_EXCEPTION, plus_zero, INEXACT_EXCEPTION|UNDERFLOW_EXCEPTION, min_subnorm_value, INEXACT_EXCEPTION|UNDERFLOW_EXCEPTION),
     TEST_fi_f (scalbn, -min_value * 1.25, -MANT_DIG-1, -min_subnorm_value, INEXACT_EXCEPTION|UNDERFLOW_EXCEPTION, -min_subnorm_value, INEXACT_EXCEPTION|UNDERFLOW_EXCEPTION, minus_zero, INEXACT_EXCEPTION|UNDERFLOW_EXCEPTION, minus_zero, INEXACT_EXCEPTION|UNDERFLOW_EXCEPTION),
-    TEST_fi_f (scalbn, min_value * 1.25, -MANT_DIG-2, plus_uflow, INEXACT_EXCEPTION|UNDERFLOW_EXCEPTION),
-    TEST_fi_f (scalbn, -min_value * 1.25, -MANT_DIG-2, minus_uflow, INEXACT_EXCEPTION|UNDERFLOW_EXCEPTION),
-
-    TEST_fi_f (scalbn, 1, INT_MAX, plus_oflow, INEXACT_EXCEPTION|OVERFLOW_EXCEPTION),
-    TEST_fi_f (scalbn, 1, INT_MIN, plus_uflow, INEXACT_EXCEPTION|UNDERFLOW_EXCEPTION),
-    TEST_fi_f (scalbn, max_value, INT_MAX, plus_oflow, INEXACT_EXCEPTION|OVERFLOW_EXCEPTION),
-    TEST_fi_f (scalbn, max_value, INT_MIN, plus_uflow, INEXACT_EXCEPTION|UNDERFLOW_EXCEPTION),
-    TEST_fi_f (scalbn, min_value, INT_MAX, plus_oflow, INEXACT_EXCEPTION|OVERFLOW_EXCEPTION),
-    TEST_fi_f (scalbn, min_value, INT_MIN, plus_uflow, INEXACT_EXCEPTION|UNDERFLOW_EXCEPTION),
-    TEST_fi_f (scalbn, min_value / 4, INT_MAX, plus_oflow, INEXACT_EXCEPTION|OVERFLOW_EXCEPTION),
-    TEST_fi_f (scalbn, min_value / 4, INT_MIN, plus_uflow, INEXACT_EXCEPTION|UNDERFLOW_EXCEPTION),
-
-    TEST_fi_f (scalbn, -1, INT_MAX, minus_oflow, INEXACT_EXCEPTION|OVERFLOW_EXCEPTION),
-    TEST_fi_f (scalbn, -1, INT_MIN, minus_uflow, INEXACT_EXCEPTION|UNDERFLOW_EXCEPTION),
-    TEST_fi_f (scalbn, -max_value, INT_MAX, minus_oflow, INEXACT_EXCEPTION|OVERFLOW_EXCEPTION),
-    TEST_fi_f (scalbn, -max_value, INT_MIN, minus_uflow, INEXACT_EXCEPTION|UNDERFLOW_EXCEPTION),
-    TEST_fi_f (scalbn, -min_value, INT_MAX, minus_oflow, INEXACT_EXCEPTION|OVERFLOW_EXCEPTION),
-    TEST_fi_f (scalbn, -min_value, INT_MIN, minus_uflow, INEXACT_EXCEPTION|UNDERFLOW_EXCEPTION),
-    TEST_fi_f (scalbn, -min_value / 4, INT_MAX, minus_oflow, INEXACT_EXCEPTION|OVERFLOW_EXCEPTION),
-    TEST_fi_f (scalbn, -min_value / 4, INT_MIN, minus_uflow, INEXACT_EXCEPTION|UNDERFLOW_EXCEPTION),
+    TEST_fi_f (scalbn, min_value * 1.25, -MANT_DIG-2, plus_uflow, INEXACT_EXCEPTION|UNDERFLOW_EXCEPTION|ERRNO_PLUS_UFLOW),
+    TEST_fi_f (scalbn, -min_value * 1.25, -MANT_DIG-2, minus_uflow, INEXACT_EXCEPTION|UNDERFLOW_EXCEPTION|ERRNO_MINUS_UFLOW),
+
+    TEST_fi_f (scalbn, 1, INT_MAX, plus_oflow, INEXACT_EXCEPTION|OVERFLOW_EXCEPTION|ERRNO_PLUS_OFLOW),
+    TEST_fi_f (scalbn, 1, INT_MIN, plus_uflow, INEXACT_EXCEPTION|UNDERFLOW_EXCEPTION|ERRNO_PLUS_UFLOW),
+    TEST_fi_f (scalbn, max_value, INT_MAX, plus_oflow, INEXACT_EXCEPTION|OVERFLOW_EXCEPTION|ERRNO_PLUS_OFLOW),
+    TEST_fi_f (scalbn, max_value, INT_MIN, plus_uflow, INEXACT_EXCEPTION|UNDERFLOW_EXCEPTION|ERRNO_PLUS_UFLOW),
+    TEST_fi_f (scalbn, min_value, INT_MAX, plus_oflow, INEXACT_EXCEPTION|OVERFLOW_EXCEPTION|ERRNO_PLUS_OFLOW),
+    TEST_fi_f (scalbn, min_value, INT_MIN, plus_uflow, INEXACT_EXCEPTION|UNDERFLOW_EXCEPTION|ERRNO_PLUS_UFLOW),
+    TEST_fi_f (scalbn, min_value / 4, INT_MAX, plus_oflow, INEXACT_EXCEPTION|OVERFLOW_EXCEPTION|ERRNO_PLUS_OFLOW),
+    TEST_fi_f (scalbn, min_value / 4, INT_MIN, plus_uflow, INEXACT_EXCEPTION|UNDERFLOW_EXCEPTION|ERRNO_PLUS_UFLOW),
+
+    TEST_fi_f (scalbn, -1, INT_MAX, minus_oflow, INEXACT_EXCEPTION|OVERFLOW_EXCEPTION|ERRNO_MINUS_OFLOW),
+    TEST_fi_f (scalbn, -1, INT_MIN, minus_uflow, INEXACT_EXCEPTION|UNDERFLOW_EXCEPTION|ERRNO_MINUS_UFLOW),
+    TEST_fi_f (scalbn, -max_value, INT_MAX, minus_oflow, INEXACT_EXCEPTION|OVERFLOW_EXCEPTION|ERRNO_MINUS_OFLOW),
+    TEST_fi_f (scalbn, -max_value, INT_MIN, minus_uflow, INEXACT_EXCEPTION|UNDERFLOW_EXCEPTION|ERRNO_MINUS_UFLOW),
+    TEST_fi_f (scalbn, -min_value, INT_MAX, minus_oflow, INEXACT_EXCEPTION|OVERFLOW_EXCEPTION|ERRNO_MINUS_OFLOW),
+    TEST_fi_f (scalbn, -min_value, INT_MIN, minus_uflow, INEXACT_EXCEPTION|UNDERFLOW_EXCEPTION|ERRNO_MINUS_UFLOW),
+    TEST_fi_f (scalbn, -min_value / 4, INT_MAX, minus_oflow, INEXACT_EXCEPTION|OVERFLOW_EXCEPTION|ERRNO_MINUS_OFLOW),
+    TEST_fi_f (scalbn, -min_value / 4, INT_MIN, minus_uflow, INEXACT_EXCEPTION|UNDERFLOW_EXCEPTION|ERRNO_MINUS_UFLOW),
   };
 
 static void
@@ -9264,35 +9264,35 @@ static const struct test_fl_f_data scalbln_test_data[] =
 
     TEST_fl_f (scalbln, 1, 0L, 1, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
 
-    TEST_fl_f (scalbln, min_value / 2, 0, min_value / 2, NO_INEXACT_EXCEPTION),
-    TEST_fl_f (scalbln, -min_value / 2, 0, -min_value / 2, NO_INEXACT_EXCEPTION),
-    TEST_fl_f (scalbln, min_value / 2, 1, min_value, NO_INEXACT_EXCEPTION),
-    TEST_fl_f (scalbln, -min_value / 2, 1, -min_value, NO_INEXACT_EXCEPTION),
-    TEST_fl_f (scalbln, min_value * 0x0.ffffp0, 0, min_value * 0x0.ffffp0, NO_INEXACT_EXCEPTION),
-    TEST_fl_f (scalbln, -min_value * 0x0.ffffp0, 0, -min_value * 0x0.ffffp0, NO_INEXACT_EXCEPTION),
-    TEST_fl_f (scalbln, min_subnorm_value, 0, min_subnorm_value, NO_INEXACT_EXCEPTION),
-    TEST_fl_f (scalbln, -min_subnorm_value, 0, -min_subnorm_value, NO_INEXACT_EXCEPTION),
-    TEST_fl_f (scalbln, min_subnorm_value, MANT_DIG, min_value, NO_INEXACT_EXCEPTION),
-    TEST_fl_f (scalbln, -min_subnorm_value, MANT_DIG, -min_value, NO_INEXACT_EXCEPTION),
-
-    TEST_fl_f (scalbln, min_value, -MANT_DIG, min_subnorm_value, NO_INEXACT_EXCEPTION),
-    TEST_fl_f (scalbln, -min_value, -MANT_DIG, -min_subnorm_value, NO_INEXACT_EXCEPTION),
-    TEST_fl_f (scalbln, min_value, -MANT_DIG-1, plus_uflow, INEXACT_EXCEPTION|UNDERFLOW_EXCEPTION),
-    TEST_fl_f (scalbln, -min_value, -MANT_DIG-1, minus_uflow, INEXACT_EXCEPTION|UNDERFLOW_EXCEPTION),
-    TEST_fl_f (scalbln, min_value, -MANT_DIG-2, plus_uflow, INEXACT_EXCEPTION|UNDERFLOW_EXCEPTION),
-    TEST_fl_f (scalbln, -min_value, -MANT_DIG-2, minus_uflow, INEXACT_EXCEPTION|UNDERFLOW_EXCEPTION),
+    TEST_fl_f (scalbln, min_value / 2, 0, min_value / 2, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
+    TEST_fl_f (scalbln, -min_value / 2, 0, -min_value / 2, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
+    TEST_fl_f (scalbln, min_value / 2, 1, min_value, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
+    TEST_fl_f (scalbln, -min_value / 2, 1, -min_value, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
+    TEST_fl_f (scalbln, min_value * 0x0.ffffp0, 0, min_value * 0x0.ffffp0, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
+    TEST_fl_f (scalbln, -min_value * 0x0.ffffp0, 0, -min_value * 0x0.ffffp0, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
+    TEST_fl_f (scalbln, min_subnorm_value, 0, min_subnorm_value, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
+    TEST_fl_f (scalbln, -min_subnorm_value, 0, -min_subnorm_value, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
+    TEST_fl_f (scalbln, min_subnorm_value, MANT_DIG, min_value, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
+    TEST_fl_f (scalbln, -min_subnorm_value, MANT_DIG, -min_value, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
+
+    TEST_fl_f (scalbln, min_value, -MANT_DIG, min_subnorm_value, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
+    TEST_fl_f (scalbln, -min_value, -MANT_DIG, -min_subnorm_value, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
+    TEST_fl_f (scalbln, min_value, -MANT_DIG-1, plus_uflow, INEXACT_EXCEPTION|UNDERFLOW_EXCEPTION|ERRNO_PLUS_UFLOW),
+    TEST_fl_f (scalbln, -min_value, -MANT_DIG-1, minus_uflow, INEXACT_EXCEPTION|UNDERFLOW_EXCEPTION|ERRNO_MINUS_UFLOW),
+    TEST_fl_f (scalbln, min_value, -MANT_DIG-2, plus_uflow, INEXACT_EXCEPTION|UNDERFLOW_EXCEPTION|ERRNO_PLUS_UFLOW),
+    TEST_fl_f (scalbln, -min_value, -MANT_DIG-2, minus_uflow, INEXACT_EXCEPTION|UNDERFLOW_EXCEPTION|ERRNO_MINUS_UFLOW),
     TEST_fl_f (scalbln, min_value * 1.5, -MANT_DIG, min_subnorm_value, INEXACT_EXCEPTION|UNDERFLOW_EXCEPTION, min_subnorm_value * 2, INEXACT_EXCEPTION|UNDERFLOW_EXCEPTION, min_subnorm_value, INEXACT_EXCEPTION|UNDERFLOW_EXCEPTION, min_subnorm_value * 2, INEXACT_EXCEPTION|UNDERFLOW_EXCEPTION),
     TEST_fl_f (scalbln, -min_value * 1.5, -MANT_DIG, -min_subnorm_value * 2, INEXACT_EXCEPTION|UNDERFLOW_EXCEPTION, -min_subnorm_value * 2, INEXACT_EXCEPTION|UNDERFLOW_EXCEPTION, -min_subnorm_value, INEXACT_EXCEPTION|UNDERFLOW_EXCEPTION, -min_subnorm_value, INEXACT_EXCEPTION|UNDERFLOW_EXCEPTION),
     TEST_fl_f (scalbln, min_value * 1.5, -MANT_DIG-1, plus_zero, INEXACT_EXCEPTION|UNDERFLOW_EXCEPTION, min_subnorm_value, INEXACT_EXCEPTION|UNDERFLOW_EXCEPTION, plus_zero, INEXACT_EXCEPTION|UNDERFLOW_EXCEPTION, min_subnorm_value, INEXACT_EXCEPTION|UNDERFLOW_EXCEPTION),
     TEST_fl_f (scalbln, -min_value * 1.5, -MANT_DIG-1, -min_subnorm_value, INEXACT_EXCEPTION|UNDERFLOW_EXCEPTION, -min_subnorm_value, INEXACT_EXCEPTION|UNDERFLOW_EXCEPTION, minus_zero, INEXACT_EXCEPTION|UNDERFLOW_EXCEPTION, minus_zero, INEXACT_EXCEPTION|UNDERFLOW_EXCEPTION),
-    TEST_fl_f (scalbln, min_value * 1.5, -MANT_DIG-2, plus_uflow, INEXACT_EXCEPTION|UNDERFLOW_EXCEPTION),
-    TEST_fl_f (scalbln, -min_value * 1.5, -MANT_DIG-2, minus_uflow, INEXACT_EXCEPTION|UNDERFLOW_EXCEPTION),
+    TEST_fl_f (scalbln, min_value * 1.5, -MANT_DIG-2, plus_uflow, INEXACT_EXCEPTION|UNDERFLOW_EXCEPTION|ERRNO_PLUS_UFLOW),
+    TEST_fl_f (scalbln, -min_value * 1.5, -MANT_DIG-2, minus_uflow, INEXACT_EXCEPTION|UNDERFLOW_EXCEPTION|ERRNO_MINUS_UFLOW),
     TEST_fl_f (scalbln, min_value * 1.25, -MANT_DIG, min_subnorm_value, INEXACT_EXCEPTION|UNDERFLOW_EXCEPTION, min_subnorm_value, INEXACT_EXCEPTION|UNDERFLOW_EXCEPTION, min_subnorm_value, INEXACT_EXCEPTION|UNDERFLOW_EXCEPTION, min_subnorm_value * 2, INEXACT_EXCEPTION|UNDERFLOW_EXCEPTION),
     TEST_fl_f (scalbln, -min_value * 1.25, -MANT_DIG, -min_subnorm_value * 2, INEXACT_EXCEPTION|UNDERFLOW_EXCEPTION, -min_subnorm_value, INEXACT_EXCEPTION|UNDERFLOW_EXCEPTION, -min_subnorm_value, INEXACT_EXCEPTION|UNDERFLOW_EXCEPTION, -min_subnorm_value, INEXACT_EXCEPTION|UNDERFLOW_EXCEPTION),
     TEST_fl_f (scalbln, min_value * 1.25, -MANT_DIG-1, plus_zero, INEXACT_EXCEPTION|UNDERFLOW_EXCEPTION, min_subnorm_value, INEXACT_EXCEPTION|UNDERFLOW_EXCEPTION, plus_zero, INEXACT_EXCEPTION|UNDERFLOW_EXCEPTION, min_subnorm_value, INEXACT_EXCEPTION|UNDERFLOW_EXCEPTION),
     TEST_fl_f (scalbln, -min_value * 1.25, -MANT_DIG-1, -min_subnorm_value, INEXACT_EXCEPTION|UNDERFLOW_EXCEPTION, -min_subnorm_value, INEXACT_EXCEPTION|UNDERFLOW_EXCEPTION, minus_zero, INEXACT_EXCEPTION|UNDERFLOW_EXCEPTION, minus_zero, INEXACT_EXCEPTION|UNDERFLOW_EXCEPTION),
-    TEST_fl_f (scalbln, min_value * 1.25, -MANT_DIG-2, plus_uflow, INEXACT_EXCEPTION|UNDERFLOW_EXCEPTION),
-    TEST_fl_f (scalbln, -min_value * 1.25, -MANT_DIG-2, minus_uflow, INEXACT_EXCEPTION|UNDERFLOW_EXCEPTION),
+    TEST_fl_f (scalbln, min_value * 1.25, -MANT_DIG-2, plus_uflow, INEXACT_EXCEPTION|UNDERFLOW_EXCEPTION|ERRNO_PLUS_UFLOW),
+    TEST_fl_f (scalbln, -min_value * 1.25, -MANT_DIG-2, minus_uflow, INEXACT_EXCEPTION|UNDERFLOW_EXCEPTION|ERRNO_MINUS_UFLOW),
 
     TEST_fl_f (scalbln, 1, INT_MAX, plus_oflow, INEXACT_EXCEPTION|OVERFLOW_EXCEPTION|ERRNO_PLUS_OFLOW),
     TEST_fl_f (scalbln, 1, INT_MIN, plus_uflow, INEXACT_EXCEPTION|UNDERFLOW_EXCEPTION|ERRNO_PLUS_UFLOW),
diff --git a/math/s_ldexp.c b/math/s_ldexp.c
index d2f9907..0248ba2 100644
--- a/math/s_ldexp.c
+++ b/math/s_ldexp.c
@@ -26,7 +26,9 @@ double __ldexp(double value, int exp)
 	return value;
 }
 weak_alias (__ldexp, ldexp)
+weak_alias (__ldexp, scalbn)
 #ifdef NO_LONG_DOUBLE
 strong_alias (__ldexp, __ldexpl)
 weak_alias (__ldexp, ldexpl)
+weak_alias (__ldexp, scalbnl)
 #endif
diff --git a/math/s_ldexpf.c b/math/s_ldexpf.c
index 24054ff..37af880 100644
--- a/math/s_ldexpf.c
+++ b/math/s_ldexpf.c
@@ -29,3 +29,4 @@ float __ldexpf(float value, int exp)
 	return value;
 }
 weak_alias (__ldexpf, ldexpf)
+weak_alias (__ldexpf, scalbnf)
diff --git a/math/s_ldexpl.c b/math/s_ldexpl.c
index 7c7809f..f34c805 100644
--- a/math/s_ldexpl.c
+++ b/math/s_ldexpl.c
@@ -30,3 +30,4 @@ long double __ldexpl(long double value, int exp)
 	return value;
 }
 weak_alias (__ldexpl, ldexpl)
+weak_alias (__ldexpl, scalbnl)
diff --git a/sysdeps/i386/fpu/s_scalbn.S b/sysdeps/i386/fpu/s_scalbn.S
index cc9d708..dab7580 100644
--- a/sysdeps/i386/fpu/s_scalbn.S
+++ b/sysdeps/i386/fpu/s_scalbn.S
@@ -14,7 +14,6 @@ ENTRY(__scalbn)
 	fstp	%st(1)
 	ret
 END (__scalbn)
-weak_alias (__scalbn, scalbn)
 strong_alias (__scalbn, __scalbln)
 
 #include <shlib-compat.h>
diff --git a/sysdeps/i386/fpu/s_scalbnf.S b/sysdeps/i386/fpu/s_scalbnf.S
index 0de0694..ad97be8 100644
--- a/sysdeps/i386/fpu/s_scalbnf.S
+++ b/sysdeps/i386/fpu/s_scalbnf.S
@@ -14,7 +14,6 @@ ENTRY(__scalbnf)
 	fstp	%st(1)
 	ret
 END (__scalbnf)
-weak_alias (__scalbnf, scalbnf)
 strong_alias (__scalbnf, __scalblnf)
 
 #include <shlib-compat.h>
diff --git a/sysdeps/i386/fpu/s_scalbnl.S b/sysdeps/i386/fpu/s_scalbnl.S
index 8da0b00..839b5ff 100644
--- a/sysdeps/i386/fpu/s_scalbnl.S
+++ b/sysdeps/i386/fpu/s_scalbnl.S
@@ -15,7 +15,6 @@ ENTRY(__scalbnl)
 	fstp	%st(1)
 	ret
 END (__scalbnl)
-weak_alias (__scalbnl, scalbnl)
 strong_alias (__scalbnl, __scalblnl)
 
 #include <shlib-compat.h>
diff --git a/sysdeps/ieee754/dbl-64/s_scalbn.c b/sysdeps/ieee754/dbl-64/s_scalbn.c
index 0f58034..58c7e1b 100644
--- a/sysdeps/ieee754/dbl-64/s_scalbn.c
+++ b/sysdeps/ieee754/dbl-64/s_scalbn.c
@@ -58,8 +58,6 @@ __scalbn (double x, int n)
   SET_HIGH_WORD (x, (hx & 0x800fffff) | (k << 20));
   return x * twom54;
 }
-weak_alias (__scalbn, scalbn)
 #ifdef NO_LONG_DOUBLE
 strong_alias (__scalbn, __scalbnl)
-weak_alias (__scalbn, scalbnl)
 #endif
diff --git a/sysdeps/ieee754/dbl-64/wordsize-64/s_scalbn.c b/sysdeps/ieee754/dbl-64/wordsize-64/s_scalbn.c
index 3822e17..d517a91 100644
--- a/sysdeps/ieee754/dbl-64/wordsize-64/s_scalbn.c
+++ b/sysdeps/ieee754/dbl-64/wordsize-64/s_scalbn.c
@@ -55,8 +55,6 @@ __scalbn (double x, int n)
 	INSERT_WORDS64(x,(ix&INT64_C(0x800fffffffffffff))|(k<<52));
 	return x*twom54;
 }
-weak_alias (__scalbn, scalbn)
 #ifdef NO_LONG_DOUBLE
 strong_alias (__scalbn, __scalbnl)
-weak_alias (__scalbn, scalbnl)
 #endif
diff --git a/sysdeps/ieee754/flt-32/s_scalbnf.c b/sysdeps/ieee754/flt-32/s_scalbnf.c
index 5d9bdd6..f36ae24 100644
--- a/sysdeps/ieee754/flt-32/s_scalbnf.c
+++ b/sysdeps/ieee754/flt-32/s_scalbnf.c
@@ -50,4 +50,3 @@ __scalbnf (float x, int n)
 	SET_FLOAT_WORD(x,(ix&0x807fffff)|(k<<23));
 	return x*twom25;
 }
-weak_alias (__scalbnf, scalbnf)
diff --git a/sysdeps/ieee754/ldbl-128/s_scalbnl.c b/sysdeps/ieee754/ldbl-128/s_scalbnl.c
index 8916dcbfd..a5cbd0d 100644
--- a/sysdeps/ieee754/ldbl-128/s_scalbnl.c
+++ b/sysdeps/ieee754/ldbl-128/s_scalbnl.c
@@ -60,4 +60,3 @@ long double __scalbnl (long double x, int n)
 	SET_LDOUBLE_MSW64(x,(hx&0x8000ffffffffffffULL)|(k<<48));
         return x*twom114;
 }
-weak_alias (__scalbnl, scalbnl)
diff --git a/sysdeps/ieee754/ldbl-128ibm/s_scalbnl.c b/sysdeps/ieee754/ldbl-128ibm/s_scalbnl.c
index a0d7aa9..0c45088 100644
--- a/sysdeps/ieee754/ldbl-128ibm/s_scalbnl.c
+++ b/sysdeps/ieee754/ldbl-128ibm/s_scalbnl.c
@@ -102,8 +102,3 @@ long double __scalbnl (long double x, int n)
 	x = ldbl_pack (xhi, xlo);
 	return x*twolm54;
 }
-#if IS_IN (libm)
-long_double_symbol (libm, __scalbnl, scalbnl);
-#else
-long_double_symbol (libc, __scalbnl, scalbnl);
-#endif
diff --git a/sysdeps/ieee754/ldbl-64-128/s_scalbnl.c b/sysdeps/ieee754/ldbl-64-128/s_scalbnl.c
index fe2412b..15af1b2 100644
--- a/sysdeps/ieee754/ldbl-64-128/s_scalbnl.c
+++ b/sysdeps/ieee754/ldbl-64-128/s_scalbnl.c
@@ -2,8 +2,3 @@
 #undef weak_alias
 #define weak_alias(n,a)
 #include <sysdeps/ieee754/ldbl-128/s_scalbnl.c>
-#if IS_IN (libm)
-long_double_symbol (libm, __scalbnl, scalbnl);
-#else
-long_double_symbol (libc, __scalbnl, scalbnl);
-#endif
diff --git a/sysdeps/ieee754/ldbl-opt/s_ldexpl.c b/sysdeps/ieee754/ldbl-opt/s_ldexpl.c
index 0dce1b1..ed87a92 100644
--- a/sysdeps/ieee754/ldbl-opt/s_ldexpl.c
+++ b/sysdeps/ieee754/ldbl-opt/s_ldexpl.c
@@ -2,8 +2,11 @@
 #undef weak_alias
 #define weak_alias(n,a)
 #include <math/s_ldexpl.c>
+strong_alias (__ldexpl, __ldexpl_2)
 #if IS_IN (libm)
 long_double_symbol (libm, __ldexpl, ldexpl);
+long_double_symbol (libm, __ldexpl_2, scalbnl);
 #else
 long_double_symbol (libc, __ldexpl, ldexpl);
+long_double_symbol (libc, __ldexpl_2, scalbnl);
 #endif
diff --git a/sysdeps/m68k/m680x0/fpu/s_scalbn.c b/sysdeps/m68k/m680x0/fpu/s_scalbn.c
index 940c6b6..4e0b878 100644
--- a/sysdeps/m68k/m680x0/fpu/s_scalbn.c
+++ b/sysdeps/m68k/m680x0/fpu/s_scalbn.c
@@ -45,7 +45,6 @@ __CONCATX(__scalbn,suffix) (x, exp)
 {
   return __m81_u(__CONCATX(__scalbn,suffix))(x, exp);
 }
-weak_alias (__CONCATX(__scalbn,suffix), __CONCATX(scalbn,suffix))
 strong_alias (__CONCATX(__scalbn,suffix), __CONCATX(__scalbln,suffix))
 
 #include <shlib-compat.h>
diff --git a/sysdeps/sparc/sparc64/soft-fp/s_scalbnl.c b/sysdeps/sparc/sparc64/soft-fp/s_scalbnl.c
index 98cf6e3..09c0acd 100644
--- a/sysdeps/sparc/sparc64/soft-fp/s_scalbnl.c
+++ b/sysdeps/sparc/sparc64/soft-fp/s_scalbnl.c
@@ -50,5 +50,3 @@ long double __scalbnl(long double arg, int exp)
 
   return r;
 }
-
-weak_alias (__scalbnl, scalbnl)
diff --git a/sysdeps/x86_64/fpu/s_scalbnl.S b/sysdeps/x86_64/fpu/s_scalbnl.S
index d0e9301..6c7683c 100644
--- a/sysdeps/x86_64/fpu/s_scalbnl.S
+++ b/sysdeps/x86_64/fpu/s_scalbnl.S
@@ -15,4 +15,3 @@ ENTRY(__scalbnl)
 	fstp	%st(1)
 	ret
 END (__scalbnl)
-weak_alias (__scalbnl, scalbnl)