powerpc: floor/floorf refactor

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

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/round_to_integer.h (set_fenv_mode):
	Add FLOOR option.
	(round_mode): Add definition for FLOOR.
	* sysdeps/powerpc/fpu/s_floor.c: New file.
	* sysdeps/powerpc/fpu/s_floorf.c: Likewise.
	* sysdeps/powerpc/powerpc32/fpu/s_floor.S: Remove file.
	* sysdeps/powerpc/powerpc32/fpu/s_floorf.S: Likewise.
	* sysdeps/powerpc/powerpc32/power4/fpu/multiarch/s_floor-power5+.S:
	Remove file.
	* sysdeps/powerpc/powerpc32/power4/fpu/multiarch/s_floor-ppc32.S:
	Likewise
	* sysdeps/powerpc/powerpc32/power4/fpu/multiarch/s_floorf-power5+.S:
	Likewise.
	* sysdeps/powerpc/powerpc32/power4/fpu/multiarch/s_floorf-ppc32.S:
	Likewise.
	* sysdeps/powerpc/powerpc32/power4/fpu/multiarch/s_floor-power5+.c:
	New file.
	* sysdeps/powerpc/powerpc32/power4/fpu/multiarch/s_floor-ppc32.c:
	Likewise.
	* sysdeps/powerpc/powerpc32/power4/fpu/multiarch/s_floorf-power5+.c:
	Likewise.
	* sysdeps/powerpc/powerpc32/power4/fpu/multiarch/s_floorf-ppc32.c:
	Likewise.
	* sysdeps/powerpc/powerpc32/power5+/fpu/s_floor.S: Remove file.
	* sysdeps/powerpc/powerpc32/power5+/fpu/s_floorf.S: Remove file.
	* sysdeps/powerpc/powerpc64/be/fpu/multiarch/Makefile
	(libm-sysdep_routines): Add s_floor-power5+, s_floor-ppc64,
	s_floorf-power5+, and s_floorf-ppc64.
	(CFLAGS-s_floor-power5+.c, CFLAGS-s_floorf-power5+.c): New rule.
	* sysdep/powerpc/powerpc64/be/fpu/multiarch/s_floor-power5+.c: New
	file.
	* sysdep/powerpc/powerpc64/be/fpu/multiarch/s_floor-ppc64.c: Likewise.
	* sysdeps/powerpc/powerpc64/fpu/multiarch/s_floor.c: Move to ...
	* sysdeps/powerpc/powerpc64/be/fpu/multiarch/s_floor.c: ... here.
	* sysdep/powerpc/powerpc64/be/fpu/multiarch/s_floorf-power5+.c: New
	file.
	* sysdep/powerpc/powerpc64/be/fpu/multiarch/s_floorf-ppc64.c:
	Likewise.
	* sysdeps/powerpc/powerpc64/fpu/multiarch/s_floorf.c: Move to ...
	* sysdeps/powerpc/powerpc64/be/fpu/multiarch/s_floorf.c: ... here.
	* sysdeps/powerpc/powerpc64/fpu/multiarch/Makefile
	(libm-sysdep_routines): Remove s_floor-power5+, s_floor-ppc64,
	s_floorf-power5+, and s_floorf-ppc64.
	* sysdep/powerpc/powerpc64/fpu/multiarch/s_floor-power5+.S: Remove
	file.
	* sysdeps/powerpc/powerpc64/fpu/multiarch/s_floor-ppc64.S: Remove
	file.
	* sysdeps/powerpc/powerpc64/fpu/multiarch/s_floorf-power5+.S:
	Likewise.
	* sysdeps/powerpc/powerpc64/fpu/multiarch/s_floorf-ppc64.S:
	Likewise.
	* sysdeps/powerpc/powerpc64/fpu/s_floor.S: Likewise.
	* sysdeps/powerpc/powerpc64/fpu/s_floorf.S: Likewise.
	* sysdeps/powerpc/powerpc64/power5+/fpu/s_floor.S: Likewise.
	* sysdeps/powerpc/powerpc64/power5+/fpu/s_floorf.S: Likewise.

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

7 files changed, 87 insertions, 1 deletions

diff --git a/sysdeps/powerpc/powerpc64/be/fpu/multiarch/Makefile b/sysdeps/powerpc/powerpc64/be/fpu/multiarch/Makefile
index 932c3c7e6c..8bb06e5cc0 100644
--- a/sysdeps/powerpc/powerpc64/be/fpu/multiarch/Makefile
+++ b/sysdeps/powerpc/powerpc64/be/fpu/multiarch/Makefile
@@ -2,8 +2,14 @@ ifeq ($(subdir),math)
 libm-sysdep_routines += s_ceil-power5+ \
 			s_ceil-ppc64 \
 			s_ceilf-power5+ \
-			s_ceilf-ppc64
+			s_ceilf-ppc64 \
+			s_floor-power5+ \
+			s_floor-ppc64 \
+			s_floorf-power5+ \
+			s_floorf-ppc64
 
 CFLAGS-s_ceil-power5+.c = -mcpu=power5+
 CFLAGS-s_ceilf-power5+.c = -mcpu=power5+
+CFLAGS-s_floor-power5+.c = -mcpu=power5+
+CFLAGS-s_floorf-power5+.c = -mcpu=power5+
 endif
diff --git a/sysdeps/powerpc/powerpc64/be/fpu/multiarch/s_floor-power5+.c b/sysdeps/powerpc/powerpc64/be/fpu/multiarch/s_floor-power5+.c
new file mode 100644
index 0000000000..d3c2f52e57
--- /dev/null
+++ b/sysdeps/powerpc/powerpc64/be/fpu/multiarch/s_floor-power5+.c
@@ -0,0 +1,3 @@
+#include <math.h>
+#define __floor __floor_power5plus
+#include <sysdeps/powerpc/fpu/s_floor.c>
diff --git a/sysdeps/powerpc/powerpc64/be/fpu/multiarch/s_floor-ppc64.c b/sysdeps/powerpc/powerpc64/be/fpu/multiarch/s_floor-ppc64.c
new file mode 100644
index 0000000000..92c072c886
--- /dev/null
+++ b/sysdeps/powerpc/powerpc64/be/fpu/multiarch/s_floor-ppc64.c
@@ -0,0 +1,3 @@
+#include <math.h>
+#define __floor __floor_ppc64
+#include <sysdeps/powerpc/fpu/s_floor.c>
diff --git a/sysdeps/powerpc/powerpc64/be/fpu/multiarch/s_floor.c b/sysdeps/powerpc/powerpc64/be/fpu/multiarch/s_floor.c
new file mode 100644
index 0000000000..e421c176d4
--- /dev/null
+++ b/sysdeps/powerpc/powerpc64/be/fpu/multiarch/s_floor.c
@@ -0,0 +1,34 @@
+/* Multiple versions of floor.
+   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 <math_ldbl_opt.h>
+#include <shlib-compat.h>
+#include "init-arch.h"
+#include <libm-alias-double.h>
+
+extern __typeof (__floor) __floor_ppc64 attribute_hidden;
+extern __typeof (__floor) __floor_power5plus attribute_hidden;
+
+libc_ifunc (__floor,
+	    (hwcap & PPC_FEATURE_POWER5_PLUS)
+	    ? __floor_power5plus
+            : __floor_ppc64);
+
+libm_alias_double (__floor, floor)
diff --git a/sysdeps/powerpc/powerpc64/be/fpu/multiarch/s_floorf-power5+.c b/sysdeps/powerpc/powerpc64/be/fpu/multiarch/s_floorf-power5+.c
new file mode 100644
index 0000000000..ecc409580b
--- /dev/null
+++ b/sysdeps/powerpc/powerpc64/be/fpu/multiarch/s_floorf-power5+.c
@@ -0,0 +1,3 @@
+#include <math.h>
+#define __floorf __floorf_power5plus
+#include <sysdeps/powerpc/fpu/s_floorf.c>
diff --git a/sysdeps/powerpc/powerpc64/be/fpu/multiarch/s_floorf-ppc64.c b/sysdeps/powerpc/powerpc64/be/fpu/multiarch/s_floorf-ppc64.c
new file mode 100644
index 0000000000..ad657ecfc4
--- /dev/null
+++ b/sysdeps/powerpc/powerpc64/be/fpu/multiarch/s_floorf-ppc64.c
@@ -0,0 +1,3 @@
+#include <math.h>
+#define __floorf __floorf_ppc64
+#include <sysdeps/powerpc/fpu/s_floorf.c>
diff --git a/sysdeps/powerpc/powerpc64/be/fpu/multiarch/s_floorf.c b/sysdeps/powerpc/powerpc64/be/fpu/multiarch/s_floorf.c
new file mode 100644
index 0000000000..a0eb18dff9
--- /dev/null
+++ b/sysdeps/powerpc/powerpc64/be/fpu/multiarch/s_floorf.c
@@ -0,0 +1,34 @@
+/* Multiple versions of floorf.
+   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 <math_ldbl_opt.h>
+#include <shlib-compat.h>
+#include "init-arch.h"
+#include <libm-alias-float.h>
+
+extern __typeof (__floorf) __floorf_ppc64 attribute_hidden;
+extern __typeof (__floorf) __floorf_power5plus attribute_hidden;
+
+libc_ifunc (__floorf,
+	    (hwcap & PPC_FEATURE_POWER5_PLUS)
+	    ? __floorf_power5plus
+            : __floorf_ppc64);
+
+libm_alias_float (__floor, floor)