sparc: M7 optimized memcpy/mempcpy/memmove

Support added to identify Sparc M7/T7/S7/M8/T8 processor capability.
Performance tests run on Sparc S7 using new code and old niagara4 code.

Optimizations for memcpy also apply to mempcpy and memmove
where they share code. Optimizations for memset also apply
to bzero as they share code.

For memcpy/mempcpy/memmove, performance comparison with niagara4 code:
Long word aligned data
  0-127 bytes - minimal changes
  128-1023 bytes - 7-30% gain
  1024+ bytes - 1-7% gain (in cache); 30-100% gain (out of cache)
Word aligned data
  0-127 bytes - 50%+ gain
  128-1023 bytes - 10-200% gain
  1024+ bytes - 0-15% gain (in cache); 5-50% gain (out of cache)
Unaligned data
  0-127 bytes - 0-70%+ gain
  128-447 bytes - 40-80%+ gain
  448-511 bytes - 1-3% loss
  512-4096 bytes - 2-3% gain (in cache); 0-20% gain (out of cache)
  4096+ bytes - ± 3% (in cache); 20-50% gain (out of cache)

Tested in sparcv9-*-* and sparc64-*-* targets in both multi and
non-multi arch configurations.

	Patrick McGehearty  <patrick.mcgehearty@oracle.com>
	Adhemerval Zanella  <adhemerval.zanella@linaro.org>

	* sysdeps/sparc/sparc32/sparcv9/multiarch/Makefile
	(sysdeps_routines): Add memcpy-memmove-niagara7 and memmove-ultra1.
	* sysdeps/sparc/sparc64/multiarch/Makefile (sysdeps_routines):
	Likewise.
	* sysdeps/sparc/sparc32/sparcv9/multiarch/memcpy-memmove-niagara7.S:
	New file.
	* sysdeps/sparc/sparc32/sparcv9/multiarch/memmove-ultra1.S: Likewise.
	* sysdeps/sparc/sparc32/sparcv9/multiarch/rtld-memmove.c: Likewise.
	* sysdeps/sparc/sparc64/multiarch/ifunc-impl-list.c
	(__libc_ifunc_impl_list): Add __memcpy_niagara7, __mempcpy_niagara7,
	and __memmove_niagara7.
	* sysdeps/sparc/sparc64/multiarch/ifunc-memcpy.h (IFUNC_SELECTOR):
	Add niagara7 option.
	* sysdeps/sparc/sparc64/multiarch/memmove.c: New file.
	* sysdeps/sparc/sparc64/multiarch/ifunc-memmove.h: Likewise.
	* sysdeps/sparc/sparc64/multiarch/memcpy-memmove-niagara7.S: Likewise.
	* sysdeps/sparc/sparc64/multiarch/memmove-ultra1.S: Likewise.
	* sysdeps/sparc/sparc64/multiarch/rtld-memmove.c: Likewise.

1 files changed, 31 insertions, 0 deletions

diff --git a/sysdeps/sparc/sparc64/multiarch/ifunc-memmove.h b/sysdeps/sparc/sparc64/multiarch/ifunc-memmove.h
new file mode 100644
index 0000000000..35ca614ac9
--- /dev/null
+++ b/sysdeps/sparc/sparc64/multiarch/ifunc-memmove.h
@@ -0,0 +1,31 @@
+/* Common definition for memmove implementation.
+   All versions must be listed in ifunc-impl-list.c.
+   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 <ifunc-init.h>
+
+extern __typeof (REDIRECT_NAME) OPTIMIZE (niagara7) attribute_hidden;
+extern __typeof (REDIRECT_NAME) OPTIMIZE (ultra1) attribute_hidden;
+
+static inline void *
+IFUNC_SELECTOR (int hwcap)
+{
+  if (hwcap & HWCAP_SPARC_ADP)
+    return OPTIMIZE (niagara7);
+  return OPTIMIZE (ultra1);
+}