sparc: refactor cpu_relax to C

	* sysdeps/sparc/sparc64/cpu_relax.c: New file.
	* sysdeps/sparc/sparc32/sparcv9/cpu_relax.c: Likewise.
	* sysdeps/sparc/sparc64/cpu_relax.S: Remove file.
	* sysdeps/sparc/sparc32/sparcv9/cpu_relax.S: Likewise.

Signed-off-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>

5 files changed, 44 insertions, 68 deletions

diff --git a/ChangeLog b/ChangeLog
index d4392c07b1..50b83a37f5 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,5 +1,10 @@
 2017-12-01  Adhemerval Zanella  <adhemerval.zanella@linaro.org>
 
+	* sysdeps/sparc/sparc64/cpu_relax.c: New file.
+	* sysdeps/sparc/sparc32/sparcv9/cpu_relax.c: Likewise.
+	* sysdeps/sparc/sparc64/cpu_relax.S: Remove file.
+	* sysdeps/sparc/sparc32/sparcv9/cpu_relax.S: Likewise.
+
 	* sysdeps/sparc/sparc32/sparcv9/fpu/multiarch/Makefile
 	(libm-sysdep_routines): Add s_nearbyintf-generic and
 	s_nearbyint-generic.
diff --git a/sysdeps/sparc/sparc32/sparcv9/cpu_relax.S b/sysdeps/sparc/sparc32/sparcv9/cpu_relax.S
deleted file mode 100644
index 41a5e72b25..0000000000
--- a/sysdeps/sparc/sparc32/sparcv9/cpu_relax.S
+++ /dev/null
@@ -1 +0,0 @@
-#include <sysdeps/sparc/sparc64/cpu_relax.S>
diff --git a/sysdeps/sparc/sparc32/sparcv9/cpu_relax.c b/sysdeps/sparc/sparc32/sparcv9/cpu_relax.c
new file mode 100644
index 0000000000..1670cf6558
--- /dev/null
+++ b/sysdeps/sparc/sparc32/sparcv9/cpu_relax.c
@@ -0,0 +1 @@
+#include <sysdeps/sparc/sparc64/cpu_relax.c>
diff --git a/sysdeps/sparc/sparc64/cpu_relax.S b/sysdeps/sparc/sparc64/cpu_relax.S
deleted file mode 100644
index 5271164607..0000000000
--- a/sysdeps/sparc/sparc64/cpu_relax.S
+++ /dev/null
@@ -1,67 +0,0 @@
-/* CPU strand yielding for busy loops.
-   Copyright (C) 2012-2017 Free Software Foundation, Inc.
-   Contributed by David S. Miller (davem@davemloft.net)
-   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>
-
-	.text
-__cpu_relax_generic:
-	rd	%ccr, %g0
-	rd	%ccr, %g0
-	rd	%ccr, %g0
-	retl
-	 nop
-	.size	__cpu_relax_generic,.-__cpu_relax_generic
-
-__cpu_relax_pause:
-	wr	%g0, 128, %asr27
-	retl
-	 nop
-	.size	__cpu_relax_pause,.-__cpu_relax_pause
-
-ENTRY(__cpu_relax)
-	.type	__cpu_relax, @gnu_indirect_function
-# ifdef SHARED
-	SETUP_PIC_REG_LEAF(o3, o5)
-# endif
-	set	HWCAP_SPARC_PAUSE, %o1
-	andcc	%o0, %o1, %g0
-	be	1f
-	 nop
-# ifdef SHARED
-	sethi	%gdop_hix22(__cpu_relax_pause), %o1
-	xor	%o1, %gdop_lox10(__cpu_relax_pause), %o1
-# else
-	set	__cpu_relax_pause, %o1
-# endif
-	ba	10f
-	 nop
-1:
-# ifdef SHARED
-	sethi	%gdop_hix22(__cpu_relax_generic), %o1
-	xor	%o1, %gdop_lox10(__cpu_relax_generic), %o1
-# else
-	set	__cpu_relax_generic, %o1
-# endif
-10:
-# ifdef SHARED
-	add	%o3, %o1, %o1
-# endif
-	retl
-	 mov	%o1, %o0
-END(__cpu_relax)
diff --git a/sysdeps/sparc/sparc64/cpu_relax.c b/sysdeps/sparc/sparc64/cpu_relax.c
new file mode 100644
index 0000000000..7e01186c2c
--- /dev/null
+++ b/sysdeps/sparc/sparc64/cpu_relax.c
@@ -0,0 +1,38 @@
+/* CPU strand yielding for busy loops.  Linux/sparc64 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 <sparc-ifunc.h>
+
+static void
+__cpu_relax_generic (void)
+{
+  asm volatile ("rd %ccr, %g0;"
+		"rd %ccr, %g0;"
+		"rd %ccr, %g0");
+}
+
+static void
+__cpu_relax_pause (void)
+{
+  asm volatile ("wr %g0, 128, %asr27");
+}
+
+sparc_libc_ifunc (__cpu_relax,
+		  hwcap & HWCAP_SPARC_PAUSE
+		  ? __cpu_relax_pause
+		  : __cpu_relax_generic)