1 files changed, 39 insertions, 0 deletions
diff --git a/libc/sysdeps/ieee754/ldbl-128ibm/s_fmal.c b/libc/sysdeps/ieee754/ldbl-128ibm/s_fmal.c
new file mode 100644
index 000000000..e59d2c349
--- /dev/null
+++ b/libc/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