powerpc: Add a POWER8-optimized version of cosf()

This implementation is based on the one already used at
sysdeps/powerpc/powerpc64/fpu/multiarch/s_sinf-power8.S.

	* sysdeps/powerpc/powerpc64/fpu/multiarch/Makefile
	[$(subdir) = math] (libm-sysdep_routines): Add s_cosf-power8 and
	s_cosf-ppc64.
	* sysdeps/powerpc/powerpc64/fpu/multiarch/s_cosf-power8.S: New file.
	* sysdeps/powerpc/powerpc64/fpu/multiarch/s_cosf-ppc64.c: Likewise.
	* sysdeps/powerpc/powerpc64/fpu/multiarch/s_cosf.c: Likewise.
	* sysdeps/powerpc/powerpc64/power8/fpu/s_cosf.S: Likewise.

4 files changed, 85 insertions, 1 deletions

diff --git a/sysdeps/powerpc/powerpc64/fpu/multiarch/Makefile b/sysdeps/powerpc/powerpc64/fpu/multiarch/Makefile
index ff4228825e..317a988854 100644
--- a/sysdeps/powerpc/powerpc64/fpu/multiarch/Makefile
+++ b/sysdeps/powerpc/powerpc64/fpu/multiarch/Makefile
@@ -26,7 +26,8 @@ libm-sysdep_routines += s_isnan-power7 s_isnan-power6x s_isnan-power6 \
 			s_isnan-power8 s_isinf-power8 s_finite-power8 \
 			s_llrint-power8 s_llround-power8 \
 			e_expf-power8 e_expf-ppc64 \
-			s_sinf-ppc64 s_sinf-power8
+			s_sinf-ppc64 s_sinf-power8 \
+			s_cosf-ppc64 s_cosf-power8
 
 CFLAGS-s_logbf-power7.c = -mcpu=power7
 CFLAGS-s_logbl-power7.c = -mcpu=power7
diff --git a/sysdeps/powerpc/powerpc64/fpu/multiarch/s_cosf-power8.S b/sysdeps/powerpc/powerpc64/fpu/multiarch/s_cosf-power8.S
new file mode 100644
index 0000000000..ee00a2c43a
--- /dev/null
+++ b/sysdeps/powerpc/powerpc64/fpu/multiarch/s_cosf-power8.S
@@ -0,0 +1,26 @@
+/* cosf function.  PowerPC64/power8 version.
+   Copyright (C) 2017 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/>.  */
+
+#include <sysdep.h>
+
+#undef weak_alias
+#define weak_alias(a,b)
+
+#define __cosf __cosf_power8
+
+#include <sysdeps/powerpc/powerpc64/power8/fpu/s_cosf.S>
diff --git a/sysdeps/powerpc/powerpc64/fpu/multiarch/s_cosf-ppc64.c b/sysdeps/powerpc/powerpc64/fpu/multiarch/s_cosf-ppc64.c
new file mode 100644
index 0000000000..635624c538
--- /dev/null
+++ b/sysdeps/powerpc/powerpc64/fpu/multiarch/s_cosf-ppc64.c
@@ -0,0 +1,26 @@
+/* cosf function.  PowerPC64 default version.
+   Copyright (C) 2017 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/>.  */
+
+#include <sysdep.h>
+
+#undef weak_alias
+#define weak_alias(a, b)
+
+#define __cosf __cosf_ppc64
+
+#include <sysdeps/powerpc/fpu/s_cosf.c>
diff --git a/sysdeps/powerpc/powerpc64/fpu/multiarch/s_cosf.c b/sysdeps/powerpc/powerpc64/fpu/multiarch/s_cosf.c
new file mode 100644
index 0000000000..acf2a59d69
--- /dev/null
+++ b/sysdeps/powerpc/powerpc64/fpu/multiarch/s_cosf.c
@@ -0,0 +1,31 @@
+/* Multiple versions of cosf.
+   Copyright (C) 2017 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/>.  */
+
+#include <math.h>
+#include <shlib-compat.h>
+#include "init-arch.h"
+
+extern __typeof (__cosf) __cosf_ppc64 attribute_hidden;
+extern __typeof (__cosf) __cosf_power8 attribute_hidden;
+
+libc_ifunc (__cosf,
+	    (hwcap2 & PPC_FEATURE2_ARCH_2_07)
+	    ? __cosf_power8
+	    : __cosf_ppc64);
+
+weak_alias (__cosf, cosf)