1 files changed, 59 insertions, 0 deletions
diff --git a/sysdeps/powerpc/fpu/s_modf.c b/sysdeps/powerpc/fpu/s_modf.c
new file mode 100644
index 0000000000..2304fc48ed
--- /dev/null
+++ b/sysdeps/powerpc/fpu/s_modf.c
@@ -0,0 +1,59 @@
+/* Copyright (C) 2013-2019 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 Library General Public License as
+   published by the Free Software Foundation; either version 2 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
+   Library General Public License for more details.
+
+   You should have received a copy of the GNU Library General Public
+   License along with the GNU C Library; see the file COPYING.LIB.  If
+   not, see <http://www.gnu.org/licenses/>.  */
+
+/* ISA 2.07 provides fast GPR to FP instruction (mfvsr{d,wz}) which make
+   generic implementation faster.  Also disables for old ISAs that do not
+   have ceil/floor instructions.  */
+#if defined(_ARCH_PWR8) || !defined(_ARCH_PWR5X)
+# include <sysdeps/ieee754/ldbl-opt/s_modf.c>
+#else
+# include <math.h>
+# include <math_ldbl_opt.h>
+# include <libm-alias-double.h>
+
+double
+__modf (double x, double *iptr)
+{
+  if (__builtin_isinf (x))
+    {
+      *iptr = x;
+      return copysign (0.0, x);
+    }
+  else if (__builtin_isnan (x))
+    {
+      *iptr = NAN;
+      return NAN;
+    }
+
+  if (x >= 0.0)
+    {
+      *iptr = floor (x);
+      return copysign (x - *iptr, x);
+    }
+  else
+    {
+      *iptr = ceil (x);
+      return copysign (x - *iptr, x);
+    }
+}
+# ifndef __modf
+libm_alias_double (__modf, modf)
+#  if LONG_DOUBLE_COMPAT (libc, GLIBC_2_0)
+compat_symbol (libc, __modf, modfl, GLIBC_2_0);
+#  endif
+# endif
+#endif