roundf-ieee: Fix test failures on AIX 7.1 and OSF/1 5.1.

* m4/roundf.m4 (gl_FUNC_ROUNDF): Test also the sign of roundf (-0.3f).
* modules/roundf-ieee (Depends-on): Add floorf-ieee, ceilf-ieee.
* doc/posix-functions/roundf.texi: Mention problem with negative
arguments.
* doc/posix-functions/ceilf.texi: Mention problem on OSF/1 5.1.

diff --git a/ChangeLog b/ChangeLog
index 698473f0a59f508f25946e148c6b9d6c156ddf74..74dd189df302995aa9f8a8ef9d4cca15e64071e4 100644 (file)
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,12 @@
+2011-06-19  Bruno Haible  <bruno@clisp.org>
+
+       roundf-ieee: Fix test failures on AIX 7.1 and OSF/1 5.1.
+       * m4/roundf.m4 (gl_FUNC_ROUNDF): Test also the sign of roundf (-0.3f).
+       * modules/roundf-ieee (Depends-on): Add floorf-ieee, ceilf-ieee.
+       * doc/posix-functions/roundf.texi: Mention problem with negative
+       arguments.
+       * doc/posix-functions/ceilf.texi: Mention problem on OSF/1 5.1.
+
 2011-06-19  Bruno Haible  <bruno@clisp.org>
 
        ceilf-ieee: Work around bug on MacOS X 10.5.

diff --git a/doc/posix-functions/ceilf.texi b/doc/posix-functions/ceilf.texi
index f9c0394eb401c0fdab55b05cfc2b48238b59bfb3..890b979b267ea4f9963f1a970c83d7aa9338334e 100644 (file)
--- a/doc/posix-functions/ceilf.texi
+++ b/doc/posix-functions/ceilf.texi
@@ -18,7 +18,7 @@ Portability problems fixed by Gnulib module @code{ceilf-ieee}:
 @item
 This function returns a positive zero for an argument between -1 and 0
 on some platforms:
-MacOS X 10.5, AIX 7.1.
+MacOS X 10.5, AIX 7.1, OSF/1 5.1.
 @item
 This function returns a positive zero for a minus zero argument
 on some platforms:

diff --git a/doc/posix-functions/roundf.texi b/doc/posix-functions/roundf.texi
index c4fb602916d7839c0c3dfc9552a724c2befaebc1..b1d854b906a42e6b955094bfae4369f52fd5d3b7 100644 (file)
--- a/doc/posix-functions/roundf.texi
+++ b/doc/posix-functions/roundf.texi
@@ -22,6 +22,10 @@ mingw.
 Portability problems fixed by Gnulib module @code{roundf-ieee}:
 @itemize
 @item
+This function returns a positive zero for an argument between -0.5 and 0
+on some platforms:
+AIX 7.1, OSF/1 5.1.
+@item
 This function returns a positive zero for a minus zero argument
 on some platforms:
 OSF/1 5.1.

diff --git a/m4/roundf.m4 b/m4/roundf.m4
index 83dffd1a8f69c58319625ad972d2283a0a44621a..9c21340cacc983cee1db398aca89aa69c1483cf6 100644 (file)
--- a/m4/roundf.m4
+++ b/m4/roundf.m4
@@ -1,4 +1,4 @@
-# roundf.m4 serial 12
+# roundf.m4 serial 13
 dnl Copyright (C) 2007-2011 Free Software Foundation, Inc.
 dnl This file is free software; the Free Software Foundation
 dnl gives unlimited permission to copy and/or distribute it,
@@ -70,10 +70,14 @@ static float dummy (float f) { return 0; }
 int main (int argc, char *argv[])
 {
   float (*my_roundf) (float) = argc ? roundf : dummy;
+  int result = 0;
   /* Test whether roundf (-0.0f) is -0.0f.  */
   if (signbitf (minus_zerof) && !signbitf (my_roundf (minus_zerof)))
-    return 1;
-  return 0;
+    result |= 1;
+  /* Test whether roundf (-0.3f) is -0.0f.  */
+  if (signbitf (-0.3f) && !signbitf (my_roundf (-0.3f)))
+    result |= 2;
+  return result;
 }
               ]])],
               [gl_cv_func_roundf_ieee=yes],

diff --git a/modules/roundf-ieee b/modules/roundf-ieee
index ffa2381cd73dcc4834d9bca9a009cb1d8acc0798..6496cc387ea4d171937522e939ce3a1fef950528 100644 (file)
--- a/modules/roundf-ieee
+++ b/modules/roundf-ieee
@@ -8,6 +8,8 @@ m4/signbit.m4
 
 Depends-on:
 roundf
+floorf-ieee     [test $HAVE_DECL_ROUNDF = 0 || test $REPLACE_ROUNDF = 1]
+ceilf-ieee      [test $HAVE_DECL_ROUNDF = 0 || test $REPLACE_ROUNDF = 1]
 
 configure.ac:
 gl_FUNC_ROUNDF_IEEE