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Consolidated two commits:
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From 51c33bd233d00d77f268ec28565506a6cd1e7d10 Mon Sep 17 00:00:00 2001
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From: Adhemerval Zanella <azanella@linux.vnet.ibm.com>
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Date: Mon, 25 Mar 2013 16:10:06 -0500
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Subject: [PATCH 25/42] PowerPC: modf optimization
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This patch implements modf/modff optimization for POWER by focus
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on FP operations instead of relying in integer ones.
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(backported from commit 3c0265394d9ffedff2b0de508602dc52e077ce5c)
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This backport does not include the benchmark tests from the original
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commit.
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From 599fefcc3e7fbf65d9c441bf1b336b272c39f262 Mon Sep 17 00:00:00 2001
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From: Adhemerval Zanella <azanella@linux.vnet.ibm.com>
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Date: Fri, 26 Apr 2013 13:00:56 -0500
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Subject: [PATCH 26/42] PowerPC: modf optimization fix
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This patch fix the 3c0265394d9ffedff2b0de508602dc52e077ce5c commits
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by correctly setting minimum architecture for modf PPC optimization
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to power5+ instead of power5 (since only on power5+ round/ceil will
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be inline to inline assembly).
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(cherry picked from commit aa630f590c9c7d070a7cdf3a2a88069ad6b63de9)
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diff -pruN glibc-2.17-c758a686/sysdeps/powerpc/power5+/fpu/s_modf.c glibc-2.17-c758a686/sysdeps/powerpc/power5+/fpu/s_modf.c
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--- glibc-2.17-c758a686/sysdeps/powerpc/power5+/fpu/s_modf.c 1970-01-01 05:30:00.000000000 +0530
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+++ glibc-2.17-c758a686/sysdeps/powerpc/power5+/fpu/s_modf.c 2013-08-06 17:48:57.609526556 +0530
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@@ -0,0 +1,58 @@
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+/* Copyright (C) 2013 Free Software Foundation, Inc.
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+ This file is part of the GNU C Library
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+
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+ The GNU C Library is free software; you can redistribute it and/or
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+ modify it under the terms of the GNU Library General Public License as
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+ published by the Free Software Foundation; either version 2 of the
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+ License, or (at your option) any later version.
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+
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+ The GNU C Library is distributed in the hope that it will be useful,
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+ but WITHOUT ANY WARRANTY; without even the implied warranty of
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+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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+ Library General Public License for more details.
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+
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+ You should have received a copy of the GNU Library General Public
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+ License along with the GNU C Library; see the file COPYING.LIB. If
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+ not, see <http://www.gnu.org/licenses/>. */
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+
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+#include <math.h>
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+#include <math_private.h>
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+#include <math_ldbl_opt.h>
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+
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+double
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+__modf (double x, double *iptr)
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+{
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+ if (__builtin_isinf (x))
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+ {
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+ *iptr = x;
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+ return __copysign (0.0, x);
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+ }
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+ else if (__builtin_isnan (x))
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+ {
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+ *iptr = NAN;
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+ return NAN;
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+ }
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+
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+ if (x >= 0.0)
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+ {
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+ *iptr = __floor (x);
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+ return (x - *iptr);
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+ }
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+ else
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+ {
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+ *iptr = __ceil (x);
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+ return (x - *iptr);
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+ }
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+}
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+weak_alias (__modf, modf)
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+#ifdef NO_LONG_DOUBLE
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+strong_alias (__modf, __modfl)
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+weak_alias (__modf, modfl)
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+#endif
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+#ifdef IS_IN_libm
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+# if LONG_DOUBLE_COMPAT(libm, GLIBC_2_0)
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+compat_symbol (libm, __modf, modfl, GLIBC_2_0);
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+# endif
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+#elif LONG_DOUBLE_COMPAT(libc, GLIBC_2_0)
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+compat_symbol (libc, __modf, modfl, GLIBC_2_0);
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+#endif
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diff -pruN glibc-2.17-c758a686/sysdeps/powerpc/power5+/fpu/s_modff.c glibc-2.17-c758a686/sysdeps/powerpc/power5+/fpu/s_modff.c
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--- glibc-2.17-c758a686/sysdeps/powerpc/power5+/fpu/s_modff.c 1970-01-01 05:30:00.000000000 +0530
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+++ glibc-2.17-c758a686/sysdeps/powerpc/power5+/fpu/s_modff.c 2013-08-06 17:48:57.609526556 +0530
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@@ -0,0 +1,46 @@
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+/* Copyright (C) 2013 Free Software Foundation, Inc.
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+ This file is part of the GNU C Library
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+
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+ The GNU C Library is free software; you can redistribute it and/or
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+ modify it under the terms of the GNU Library General Public License as
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+ published by the Free Software Foundation; either version 2 of the
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+ License, or (at your option) any later version.
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+
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+ The GNU C Library is distributed in the hope that it will be useful,
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+ but WITHOUT ANY WARRANTY; without even the implied warranty of
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+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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+ Library General Public License for more details.
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+
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+ You should have received a copy of the GNU Library General Public
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+ License along with the GNU C Library; see the file COPYING.LIB. If
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+ not, see <http://www.gnu.org/licenses/>. */
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+
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+#include <math.h>
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+#include <math_private.h>
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+
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+float
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+__modff (float x, float *iptr)
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+{
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+ if (__builtin_isinff (x))
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+ {
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+ *iptr = x;
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+ return __copysignf (0.0, x);
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+ }
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+ else if (__builtin_isnanf (x))
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+ {
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+ *iptr = NAN;
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+ return NAN;
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+ }
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+
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+ if (x >= 0.0)
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+ {
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+ *iptr = __floorf (x);
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+ return (x - *iptr);
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+ }
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+ else
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+ {
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+ *iptr = __ceilf (x);
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+ return (x - *iptr);
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+ }
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+}
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+weak_alias (__modff, modff)
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diff -pruN glibc-2.17-c758a686/sysdeps/powerpc/powerpc32/power5/Implies glibc-2.17-c758a686/sysdeps/powerpc/powerpc32/power5/Implies
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--- glibc-2.17-c758a686/sysdeps/powerpc/powerpc32/power5/Implies 2012-12-25 08:32:13.000000000 +0530
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+++ glibc-2.17-c758a686/sysdeps/powerpc/powerpc32/power5/Implies 2013-08-06 17:48:54.266526703 +0530
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@@ -1,2 +1,4 @@
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+powerpc/power5/fpu
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+powerpc/power5
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powerpc/powerpc32/power4/fpu
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powerpc/powerpc32/power4
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diff -pruN glibc-2.17-c758a686/sysdeps/powerpc/powerpc32/power5+/Implies glibc-2.17-c758a686/sysdeps/powerpc/powerpc32/power5+/Implies
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--- glibc-2.17-c758a686/sysdeps/powerpc/powerpc32/power5+/Implies 2012-12-25 08:32:13.000000000 +0530
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+++ glibc-2.17-c758a686/sysdeps/powerpc/powerpc32/power5+/Implies 2013-08-06 17:48:57.609526556 +0530
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@@ -1,2 +1,4 @@
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+powerpc/power5+/fpu
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+powerpc/power5+
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powerpc/powerpc32/power5/fpu
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powerpc/powerpc32/power5
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diff -pruN glibc-2.17-c758a686/sysdeps/powerpc/powerpc64/power5/Implies glibc-2.17-c758a686/sysdeps/powerpc/powerpc64/power5/Implies
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--- glibc-2.17-c758a686/sysdeps/powerpc/powerpc64/power5/Implies 2012-12-25 08:32:13.000000000 +0530
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+++ glibc-2.17-c758a686/sysdeps/powerpc/powerpc64/power5/Implies 2013-08-06 17:48:54.266526703 +0530
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@@ -1,2 +1,4 @@
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+powerpc/power5/fpu
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+powerpc/power5
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powerpc/powerpc64/power4/fpu
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powerpc/powerpc64/power4
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diff -pruN glibc-2.17-c758a686/sysdeps/powerpc/powerpc64/power5+/Implies glibc-2.17-c758a686/sysdeps/powerpc/powerpc64/power5+/Implies
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--- glibc-2.17-c758a686/sysdeps/powerpc/powerpc64/power5+/Implies 2012-12-25 08:32:13.000000000 +0530
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+++ glibc-2.17-c758a686/sysdeps/powerpc/powerpc64/power5+/Implies 2013-08-06 17:48:57.610526556 +0530
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@@ -1,2 +1,4 @@
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+powerpc/power5+/fpu
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+powerpc/power5+
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powerpc/powerpc64/power5/fpu
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powerpc/powerpc64/power5
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