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GNU C Library master sources branch, ibm/2.13/master, updated. glibc-2.13-34-g9cb11a4
- From: rsa at sourceware dot org
- To: glibc-cvs at sourceware dot org
- Date: 19 Aug 2011 15:33:18 -0000
- Subject: GNU C Library master sources branch, ibm/2.13/master, updated. glibc-2.13-34-g9cb11a4
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http://sources.redhat.com/git/gitweb.cgi?p=glibc.git;a=commitdiff;h=9cb11a4f1e562490f02ef634946ec015bf6e75e4
commit 9cb11a4f1e562490f02ef634946ec015bf6e75e4
Author: Dave Flaherty <flaherty@linux.vnet.ibm.com>
Date: Fri Aug 19 10:29:30 2011 -0500
Check for finite/infinity parms in IBM Long Double 128 fmal( )
This patch addresses some IBM Long Double 128 fmal () test-ldouble.out
and test-ildoubl.out failures. If the â??xâ?? and â??yâ?? parameters are
finite values and â??zâ?? is infinity, the result of fmal () should be â??zâ??
not NaN.
diff --git a/ChangeLog b/ChangeLog
index 0638748..085dad0 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,8 @@
+2011-08-18 David Flaherty <flaherty@linux.vnet.ibm.com>
+
+ * sysdeps/ieee754/ldbl-128ibm/s_fmal.c: New file which checks
+ for finite and infinity parameters.
+
2011-08-04 Will Schmidt <will_schmidt@vnet.ibm.com>
* sysdeps/powerpc/powerpc32/power7/strncmp.S: Adjust the alignment
diff --git a/sysdeps/ieee754/ldbl-128ibm/s_fmal.c b/sysdeps/ieee754/ldbl-128ibm/s_fmal.c
new file mode 100644
index 0000000..e59d2c3
--- /dev/null
+++ b/sysdeps/ieee754/ldbl-128ibm/s_fmal.c
@@ -0,0 +1,39 @@
+/* Compute x * y + z as ternary operation.
+ Copyright (C) 2011 Free Software Foundation, Inc.
+ This file is part of the GNU C Library.
+ Contributed by David Flaherty <flaherty@linux.vnet.ibm.com>.
+
+ 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, write to the Free
+ Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
+ 02111-1307 USA. */
+
+#include <math.h>
+#include <math_ldbl_opt.h>
+
+long double
+__fmal (long double x, long double y, long double z)
+{
+ /* An IBM long double 128 is really just 2 IEEE64 doubles, and in
+ * the case of inf/nan only the first double counts. So we use the
+ * (double) cast to avoid any data movement. */
+ if ((finite ((double)x) && finite ((double)y)) && isinf ((double)z))
+ return (z);
+
+ return (x * y) + z;
+}
+#ifdef IS_IN_libm
+long_double_symbol (libm, __fmal, fmal);
+#else
+long_double_symbol (libc, __fmal, fmal);
+#endif
-----------------------------------------------------------------------
Summary of changes:
ChangeLog | 5 +++++
{math => sysdeps/ieee754/ldbl-128ibm}/s_fmal.c | 19 +++++++++++++++----
2 files changed, 20 insertions(+), 4 deletions(-)
copy {math => sysdeps/ieee754/ldbl-128ibm}/s_fmal.c (61%)
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