powerpc: ceil/ceilf refactor

This patches consolidates all the powerpc ceil{f} implementations on
the generic sysdeps/powerpc/fpu/s_ceil{f}.  The generic implementation
uses either the compiler builts for ISA 2.03+ (which generates the frip
instruction) or a generic implementation which uses FP only operations.

It adds a generic implementation (round_to_integer.h) which is shared
with other rounding to integer routines.  The resulting code should be
similar in term os performance to previous assembly one.

The IFUNC organization for powerpc64 is also change to be enabled only
for powerpc64 and not for powerpc64le (since minium ISA of 2.08 does not
require the fallback generic implementation).

Checked on powerpc-linux-gnu (built without --with-cpu, with
--with-cpu=power4 and with --with-cpu=power5+ and --disable-multi-arch),
powerpc64-linux-gnu (built without --with-cp and with --with-cpu=power5+
and --disable-multi-arch).

	* sysdeps/powerpc/fpu/fenv_libc.h (__fesetround_inline_nocheck): New
	function.
	* sysdeps/powerpc/fpu/round_to_integer.h: New file.
	* sysdeps/powerpc/fpu/s_ceil.c: Likewise.
	* sysdeps/powerpc/fpu/s_ceilf.c: Likewise.
	* sysdeps/powerpc/powerpc32/fpu/s_ceil.S: Remove file.
	* sysdeps/powerpc/powerpc32/fpu/s_ceilf.S: Likewise.
	* sysdeps/powerpc/powerpc32/power4/fpu/multiarch/Makefile
	(CFLAGS-s_ceil-power5+.c, CFLAGS-s_ceilf-power5+.c): New rule.
	* sysdeps/powerpc/powerpc32/power4/fpu/multiarch/s_ceil-power5+.S:
	Remove file.
	* sysdeps/powerpc/powerpc32/power4/fpu/multiarch/s_ceil-ppc32.S:
	Likewise.
	* sysdeps/powerpc/powerpc32/power4/fpu/multiarch/s_ceilf-power5+.S:
	Likewise.
	* sysdeps/powerpc/powerpc32/power4/fpu/multiarch/s_ceilf-ppc32.S:
	Likewise.
	* sysdeps/powerpc/powerpc32/power4/fpu/multiarch/s_ceil-power5+.c:
	New file.
	* sysdeps/powerpc/powerpc32/power4/fpu/multiarch/s_ceil-ppc32.c:
	Likewise.
	* sysdeps/powerpc/powerpc32/power4/fpu/multiarch/s_ceilf-power5+.c:
	Likewise.
	* sysdeps/powerpc/powerpc32/power4/fpu/multiarch/s_ceilf-ppc32.c:
	Likewise.
	* sysdeps/powerpc/powerpc32/power5+/fpu/s_ceil.S: Remove file.
	* sysdeps/powerpc/powerpc32/power5+/fpu/s_ceilf.S: Likewise.
	* sysdeps/powerpc/powerpc64/be/fpu/multiarch/Makefile: New file.
	* sysdeps/powerpc/powerpc64/be/fpu/multiarch/s_ceil-power5+.c:
	Likewise.
	* sysdeps/powerpc/powerpc64/be/fpu/multiarch/s_ceil-ppc64.c:
	Likewise.
	* sysdeps/powerpc/powerpc64/fpu/multiarch/s_ceil.c: Move to ...
	* sysdeps/powerpc/powerpc64/be/fpu/multiarch/s_ceil.c: ... here.
	* sysdeps/powerpc/powerpc64/be/fpu/multiarch/s_ceilf-power5+.c: New
	file.
	* sysdeps/powerpc/powerpc64/be/fpu/multiarch/s_ceilf-ppc64.c:
	Likewise.
	* sysdeps/powerpc/powerpc64/fpu/multiarch/s_ceilf.c: Move to ...
	* sysdeps/powerpc/powerpc64/be/fpu/multiarch/s_ceilf.c: ...
	* here.
	* sysdeps/powerpc/powerpc64/fpu/multiarch/Makefile
	(libm-sysdep_routines): Remove s_ceil-power5+, s_ceil-ppc64,
	s_ceilf-power5+, and s_ceilf-ppc64.
	* sysdeps/powerpc/powerpc64/fpu/multiarch/s_ceil-power5+.S: Remove
	file.
	* sysdeps/powerpc/powerpc64/fpu/multiarch/s_ceil-ppc64.S: Likewise.
	* sysdeps/powerpc/powerpc64/fpu/multiarch/s_ceilf-power5+.S: Likewise.
	* sysdeps/powerpc/powerpc64/fpu/multiarch/s_ceilf-ppc64.S: Likewise.
	* sysdeps/powerpc/powerpc64/fpu/s_ceil.S: Likewise.
	* sysdeps/powerpc/powerpc64/fpu/s_ceilf.S: Likewise.
	* sysdeps/powerpc/powerpc64/power5+/fpu/s_ceil.S: Likewise.
	* sysdeps/powerpc/powerpc64/power5+/fpu/s_ceilf.S: Likewise.

Reviewed-by: Gabriel F. T. Gomes <gabriel@inconstante.eti.br>

7 files changed, 85 insertions, 0 deletions

diff --git a/sysdeps/powerpc/powerpc64/be/fpu/multiarch/Makefile b/sysdeps/powerpc/powerpc64/be/fpu/multiarch/Makefile
new file mode 100644
index 0000000000..932c3c7e6c
--- /dev/null
+++ b/sysdeps/powerpc/powerpc64/be/fpu/multiarch/Makefile
@@ -0,0 +1,9 @@
+ifeq ($(subdir),math)
+libm-sysdep_routines += s_ceil-power5+ \
+			s_ceil-ppc64 \
+			s_ceilf-power5+ \
+			s_ceilf-ppc64
+
+CFLAGS-s_ceil-power5+.c = -mcpu=power5+
+CFLAGS-s_ceilf-power5+.c = -mcpu=power5+
+endif
diff --git a/sysdeps/powerpc/powerpc64/be/fpu/multiarch/s_ceil-power5+.c b/sysdeps/powerpc/powerpc64/be/fpu/multiarch/s_ceil-power5+.c
new file mode 100644
index 0000000000..87bc66cdb0
--- /dev/null
+++ b/sysdeps/powerpc/powerpc64/be/fpu/multiarch/s_ceil-power5+.c
@@ -0,0 +1,3 @@
+#include <math.h>
+#define __ceil __ceil_power5plus
+#include <sysdeps/powerpc/fpu/s_ceil.c>
diff --git a/sysdeps/powerpc/powerpc64/be/fpu/multiarch/s_ceil-ppc64.c b/sysdeps/powerpc/powerpc64/be/fpu/multiarch/s_ceil-ppc64.c
new file mode 100644
index 0000000000..8711ff3229
--- /dev/null
+++ b/sysdeps/powerpc/powerpc64/be/fpu/multiarch/s_ceil-ppc64.c
@@ -0,0 +1,3 @@
+#include <math.h>
+#define __ceil __ceil_ppc64
+#include <sysdeps/powerpc/fpu/s_ceil.c>
diff --git a/sysdeps/powerpc/powerpc64/be/fpu/multiarch/s_ceil.c b/sysdeps/powerpc/powerpc64/be/fpu/multiarch/s_ceil.c
new file mode 100644
index 0000000000..36976a0404
--- /dev/null
+++ b/sysdeps/powerpc/powerpc64/be/fpu/multiarch/s_ceil.c
@@ -0,0 +1,32 @@
+/* Multiple versions of ceil.
+   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 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, see
+   <http://www.gnu.org/licenses/>.  */
+
+#define NO_MATH_REDIRECT
+#include <math.h>
+#include <libm-alias-double.h>
+#include "init-arch.h"
+
+extern __typeof (__ceil) __ceil_ppc64 attribute_hidden;
+extern __typeof (__ceil) __ceil_power5plus attribute_hidden;
+
+libc_ifunc (__ceil,
+	    (hwcap & PPC_FEATURE_POWER5_PLUS)
+	    ? __ceil_power5plus
+            : __ceil_ppc64);
+
+libm_alias_double (__ceil, ceil)
diff --git a/sysdeps/powerpc/powerpc64/be/fpu/multiarch/s_ceilf-power5+.c b/sysdeps/powerpc/powerpc64/be/fpu/multiarch/s_ceilf-power5+.c
new file mode 100644
index 0000000000..a5bfa98535
--- /dev/null
+++ b/sysdeps/powerpc/powerpc64/be/fpu/multiarch/s_ceilf-power5+.c
@@ -0,0 +1,3 @@
+#include <math.h>
+#define __ceilf __ceilf_power5plus
+#include <sysdeps/powerpc/fpu/s_ceilf.c>
diff --git a/sysdeps/powerpc/powerpc64/be/fpu/multiarch/s_ceilf-ppc64.c b/sysdeps/powerpc/powerpc64/be/fpu/multiarch/s_ceilf-ppc64.c
new file mode 100644
index 0000000000..086251dc09
--- /dev/null
+++ b/sysdeps/powerpc/powerpc64/be/fpu/multiarch/s_ceilf-ppc64.c
@@ -0,0 +1,3 @@
+#include <math.h>
+#define __ceilf __ceilf_ppc64
+#include <sysdeps/powerpc/fpu/s_ceilf.c>
diff --git a/sysdeps/powerpc/powerpc64/be/fpu/multiarch/s_ceilf.c b/sysdeps/powerpc/powerpc64/be/fpu/multiarch/s_ceilf.c
new file mode 100644
index 0000000000..34811330d5
--- /dev/null
+++ b/sysdeps/powerpc/powerpc64/be/fpu/multiarch/s_ceilf.c
@@ -0,0 +1,32 @@
+/* Multiple versions of ceilf.
+   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 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, see
+   <http://www.gnu.org/licenses/>.  */
+
+#define NO_MATH_REDIRECT
+#include <math.h>
+#include <libm-alias-float.h>
+#include "init-arch.h"
+
+extern __typeof (__ceilf) __ceilf_ppc64 attribute_hidden;
+extern __typeof (__ceilf) __ceilf_power5plus attribute_hidden;
+
+libc_ifunc (__ceilf,
+	    (hwcap & PPC_FEATURE_POWER5_PLUS)
+	    ? __ceilf_power5plus
+            : __ceilf_ppc64);
+
+libm_alias_float (__ceil, ceil)