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authorAdhemerval Zanella <azanella@linux.vnet.ibm.com>2013-03-25 16:10:06 -0500
committerAdhemerval Zanella <azanella@linux.vnet.ibm.com>2013-04-23 13:38:52 -0500
commit3c0265394d9ffedff2b0de508602dc52e077ce5c (patch)
treeb24ae491b39263545fd8d3a3201491c11eea78ab /sysdeps
parentff491d14a2c7329e4b61cb9d937203d4139954f9 (diff)
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PowerPC: modf optimization
This patch implements modf/modff optimization for POWER by focus
on FP operations instead of relying in integer ones.
Diffstat (limited to 'sysdeps')
-rw-r--r--sysdeps/powerpc/power5/fpu/s_modf.c58
-rw-r--r--sysdeps/powerpc/power5/fpu/s_modff.c46
-rw-r--r--sysdeps/powerpc/powerpc32/power5/Implies2
-rw-r--r--sysdeps/powerpc/powerpc64/power5/Implies2
4 files changed, 108 insertions, 0 deletions
diff --git a/sysdeps/powerpc/power5/fpu/s_modf.c b/sysdeps/powerpc/power5/fpu/s_modf.c
new file mode 100644
index 0000000000..b45bf66169
--- /dev/null
+++ b/sysdeps/powerpc/power5/fpu/s_modf.c
@@ -0,0 +1,58 @@
+/* Copyright (C) 2013 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/>.  */
+
+#include <math.h>
+#include <math_private.h>
+#include <math_ldbl_opt.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 (x - *iptr);
+    }
+  else
+    {
+      *iptr = __ceil (x);
+      return (x - *iptr);
+    }
+}
+weak_alias (__modf, modf)
+#ifdef NO_LONG_DOUBLE
+strong_alias (__modf, __modfl)
+weak_alias (__modf, modfl)
+#endif
+#ifdef IS_IN_libm
+# if LONG_DOUBLE_COMPAT(libm, GLIBC_2_0)
+compat_symbol (libm, __modf, modfl, GLIBC_2_0);
+# endif
+#elif LONG_DOUBLE_COMPAT(libc, GLIBC_2_0)
+compat_symbol (libc, __modf, modfl, GLIBC_2_0);
+#endif
diff --git a/sysdeps/powerpc/power5/fpu/s_modff.c b/sysdeps/powerpc/power5/fpu/s_modff.c
new file mode 100644
index 0000000000..55759cde05
--- /dev/null
+++ b/sysdeps/powerpc/power5/fpu/s_modff.c
@@ -0,0 +1,46 @@
+/* Copyright (C) 2013 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/>.  */
+
+#include <math.h>
+#include <math_private.h>
+
+float
+__modff (float x, float *iptr)
+{
+  if (__builtin_isinff (x))
+    {
+      *iptr = x;
+      return __copysignf (0.0, x);
+    }
+  else if (__builtin_isnanf (x))
+    {
+      *iptr = NAN;
+      return NAN;
+    }
+
+  if (x >= 0.0)
+    {
+      *iptr = __floorf (x);
+      return (x - *iptr);
+    }
+  else
+    {
+      *iptr = __ceilf (x);
+      return (x - *iptr);
+    }
+}
+weak_alias (__modff, modff)
diff --git a/sysdeps/powerpc/powerpc32/power5/Implies b/sysdeps/powerpc/powerpc32/power5/Implies
index 17139bf21c..17949d41c5 100644
--- a/sysdeps/powerpc/powerpc32/power5/Implies
+++ b/sysdeps/powerpc/powerpc32/power5/Implies
@@ -1,2 +1,4 @@
+powerpc/power5/fpu
+powerpc/power5
 powerpc/powerpc32/power4/fpu
 powerpc/powerpc32/power4
diff --git a/sysdeps/powerpc/powerpc64/power5/Implies b/sysdeps/powerpc/powerpc64/power5/Implies
index bedb20b65c..b36831e287 100644
--- a/sysdeps/powerpc/powerpc64/power5/Implies
+++ b/sysdeps/powerpc/powerpc64/power5/Implies
@@ -1,2 +1,4 @@
+powerpc/power5/fpu
+powerpc/power5
 powerpc/powerpc64/power4/fpu
 powerpc/powerpc64/power4