Patchwork [3/4] sparc: M7 optimized memcpy/mempcpy/memmove

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Submitter Patrick McGehearty
Date Dec. 13, 2017, 4:07 a.m.
Message ID <1513138050-65509-4-git-send-email-patrick.mcgehearty@oracle.com>
Download mbox | patch
Permalink /patch/24904/
State New
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Patrick McGehearty - Dec. 13, 2017, 4:07 a.m.
Tested in sparcv9-*-* and sparc64-*-* targets in both multi and
non-multi arch configurations.

Support added to identify Sparc M7/T7/S7/M8/T8 processor capability.
Usual "make check" correctness tests run with no regressions.
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)

	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.
---
 ChangeLog                                          |   19 +
 sysdeps/sparc/sparc32/sparcv9/multiarch/Makefile   |    3 +-
 .../sparcv9/multiarch/memcpy-memmove-niagara7.S    |    2 +
 .../sparc32/sparcv9/multiarch/memmove-ultra1.S     |    4 +
 .../sparc/sparc32/sparcv9/multiarch/rtld-memmove.c |    1 +
 sysdeps/sparc/sparc64/multiarch/Makefile           |    3 +-
 sysdeps/sparc/sparc64/multiarch/ifunc-impl-list.c  |    9 +
 sysdeps/sparc/sparc64/multiarch/ifunc-memcpy.h     |    3 +
 sysdeps/sparc/sparc64/multiarch/ifunc-memmove.h    |   31 +
 .../sparc64/multiarch/memcpy-memmove-niagara7.S    |  980 ++++++++++++++++++++
 sysdeps/sparc/sparc64/multiarch/memmove-ultra1.S   |    4 +
 sysdeps/sparc/sparc64/multiarch/memmove.c          |   33 +
 sysdeps/sparc/sparc64/multiarch/rtld-memmove.c     |    1 +
 13 files changed, 1091 insertions(+), 2 deletions(-)
 create mode 100644 sysdeps/sparc/sparc32/sparcv9/multiarch/memcpy-memmove-niagara7.S
 create mode 100644 sysdeps/sparc/sparc32/sparcv9/multiarch/memmove-ultra1.S
 create mode 100644 sysdeps/sparc/sparc32/sparcv9/multiarch/rtld-memmove.c
 create mode 100644 sysdeps/sparc/sparc64/multiarch/ifunc-memmove.h
 create mode 100644 sysdeps/sparc/sparc64/multiarch/memcpy-memmove-niagara7.S
 create mode 100644 sysdeps/sparc/sparc64/multiarch/memmove-ultra1.S
 create mode 100644 sysdeps/sparc/sparc64/multiarch/memmove.c
 create mode 100644 sysdeps/sparc/sparc64/multiarch/rtld-memmove.c

Patch

diff --git a/ChangeLog b/ChangeLog
index 9a9a435..ea0e060 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,5 +1,24 @@ 
 2017-12-11  Jose E. Marchesi  <jose.marchesi@oracle.com>
 
+	* 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/ifunc-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.
+
 	* sysdeps/sparc/sparc32/sparcv9/memmove.S: New file.
 	* sysdeps/sparc/sparc32/sparcv9/rtld-memmove.c: Likewise.
 	* sysdeps/sparc/sparc64/memmove.S: Likewise.
diff --git a/sysdeps/sparc/sparc32/sparcv9/multiarch/Makefile b/sysdeps/sparc/sparc32/sparcv9/multiarch/Makefile
index e12636b..869f063 100644
--- a/sysdeps/sparc/sparc32/sparcv9/multiarch/Makefile
+++ b/sysdeps/sparc/sparc32/sparcv9/multiarch/Makefile
@@ -9,5 +9,6 @@  endif
 ifeq ($(subdir),string)
 sysdep_routines += memcpy-ultra3 memcpy-niagara1 memcpy-niagara2 \
 		   memset-niagara1 memcpy-niagara4 memset-niagara4 \
-		   memcpy-ultra1 memset-ultra1
+		   memcpy-ultra1 memset-ultra1 memcpy-memmove-niagara7 \
+		   memmove-ultra1
 endif
diff --git a/sysdeps/sparc/sparc32/sparcv9/multiarch/memcpy-memmove-niagara7.S b/sysdeps/sparc/sparc32/sparcv9/multiarch/memcpy-memmove-niagara7.S
new file mode 100644
index 0000000..16da150
--- /dev/null
+++ b/sysdeps/sparc/sparc32/sparcv9/multiarch/memcpy-memmove-niagara7.S
@@ -0,0 +1,2 @@ 
+#define XCC icc
+#include <sparc64/multiarch/memcpy-memmove-niagara7.S>
diff --git a/sysdeps/sparc/sparc32/sparcv9/multiarch/memmove-ultra1.S b/sysdeps/sparc/sparc32/sparcv9/multiarch/memmove-ultra1.S
new file mode 100644
index 0000000..35ba76b
--- /dev/null
+++ b/sysdeps/sparc/sparc32/sparcv9/multiarch/memmove-ultra1.S
@@ -0,0 +1,4 @@ 
+#undef libc_hidden_builtin_def
+#define libc_hidden_builtin_def(name)
+#define memmove __memmove_ultra1
+#include <sysdeps/sparc/sparc32/sparcv9/memmove.S>
diff --git a/sysdeps/sparc/sparc32/sparcv9/multiarch/rtld-memmove.c b/sysdeps/sparc/sparc32/sparcv9/multiarch/rtld-memmove.c
new file mode 100644
index 0000000..2c88061
--- /dev/null
+++ b/sysdeps/sparc/sparc32/sparcv9/multiarch/rtld-memmove.c
@@ -0,0 +1 @@ 
+#include <sparc64/multiarch/rtld-memmove.c>
diff --git a/sysdeps/sparc/sparc64/multiarch/Makefile b/sysdeps/sparc/sparc64/multiarch/Makefile
index ba8ede1..69292ca 100644
--- a/sysdeps/sparc/sparc64/multiarch/Makefile
+++ b/sysdeps/sparc/sparc64/multiarch/Makefile
@@ -9,7 +9,8 @@  endif
 ifeq ($(subdir),string)
 sysdep_routines += memcpy-ultra3 memcpy-niagara1 memcpy-niagara2 \
 		   memset-niagara1 memcpy-niagara4 memset-niagara4 \
-		   memcpy-ultra1 memset-ultra1
+		   memcpy-ultra1 memset-ultra1 memcpy-memmove-niagara7 \
+		   memmove-ultra1
 endif
 
 ifeq ($(subdir),stdlib)
diff --git a/sysdeps/sparc/sparc64/multiarch/ifunc-impl-list.c b/sysdeps/sparc/sparc64/multiarch/ifunc-impl-list.c
index a97bc45..a803392 100644
--- a/sysdeps/sparc/sparc64/multiarch/ifunc-impl-list.c
+++ b/sysdeps/sparc/sparc64/multiarch/ifunc-impl-list.c
@@ -36,6 +36,8 @@  __libc_ifunc_impl_list (const char *name, struct libc_ifunc_impl *array,
   hwcap = GLRO(dl_hwcap);
 
   IFUNC_IMPL (i, name, memcpy,
+	      IFUNC_IMPL_ADD (array, i, memcpy, hwcap & HWCAP_SPARC_ADP,
+			      __memcpy_niagara7)
 	      IFUNC_IMPL_ADD (array, i, memcpy, hwcap & HWCAP_SPARC_CRYPTO,
 			      __memcpy_niagara4)
 	      IFUNC_IMPL_ADD (array, i, memcpy, hwcap & HWCAP_SPARC_N2,
@@ -47,6 +49,8 @@  __libc_ifunc_impl_list (const char *name, struct libc_ifunc_impl *array,
 	      IFUNC_IMPL_ADD (array, i, memcpy, 1, __memcpy_ultra1));
 
   IFUNC_IMPL (i, name, mempcpy,
+	      IFUNC_IMPL_ADD (array, i, mempcpy, hwcap & HWCAP_SPARC_ADP,
+			      __mempcpy_niagara7)
 	      IFUNC_IMPL_ADD (array, i, mempcpy, hwcap & HWCAP_SPARC_CRYPTO,
 			      __mempcpy_niagara4)
 	      IFUNC_IMPL_ADD (array, i, mempcpy, hwcap & HWCAP_SPARC_N2,
@@ -71,5 +75,10 @@  __libc_ifunc_impl_list (const char *name, struct libc_ifunc_impl *array,
 			      __memset_niagara1)
 	      IFUNC_IMPL_ADD (array, i, memset, 1, __memset_ultra1));
 
+  IFUNC_IMPL (i, name, memmove,
+	      IFUNC_IMPL_ADD (array, i, memmove, hwcap & HWCAP_SPARC_ADP,
+			      __memmove_niagara7)
+	      IFUNC_IMPL_ADD (array, i, memmove, 1, __memmove_ultra1));
+
   return i;
 }
diff --git a/sysdeps/sparc/sparc64/multiarch/ifunc-memcpy.h b/sysdeps/sparc/sparc64/multiarch/ifunc-memcpy.h
index 46f3795..dbdad2d 100644
--- a/sysdeps/sparc/sparc64/multiarch/ifunc-memcpy.h
+++ b/sysdeps/sparc/sparc64/multiarch/ifunc-memcpy.h
@@ -19,6 +19,7 @@ 
 
 #include <ifunc-init.h>
 
+extern __typeof (REDIRECT_NAME) OPTIMIZE (niagara7) attribute_hidden;
 extern __typeof (REDIRECT_NAME) OPTIMIZE (niagara4) attribute_hidden;
 extern __typeof (REDIRECT_NAME) OPTIMIZE (niagara2) attribute_hidden;
 extern __typeof (REDIRECT_NAME) OPTIMIZE (niagara1) attribute_hidden;
@@ -28,6 +29,8 @@  extern __typeof (REDIRECT_NAME) OPTIMIZE (ultra1) attribute_hidden;
 static inline void *
 IFUNC_SELECTOR (int hwcap)
 {
+  if (hwcap & HWCAP_SPARC_ADP)
+    return OPTIMIZE (niagara7);
   if (hwcap & HWCAP_SPARC_CRYPTO)
     return OPTIMIZE (niagara4);
   if (hwcap & HWCAP_SPARC_N2)
diff --git a/sysdeps/sparc/sparc64/multiarch/ifunc-memmove.h b/sysdeps/sparc/sparc64/multiarch/ifunc-memmove.h
new file mode 100644
index 0000000..35ca614
--- /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);
+}
diff --git a/sysdeps/sparc/sparc64/multiarch/memcpy-memmove-niagara7.S b/sysdeps/sparc/sparc64/multiarch/memcpy-memmove-niagara7.S
new file mode 100644
index 0000000..8c31e93
--- /dev/null
+++ b/sysdeps/sparc/sparc64/multiarch/memcpy-memmove-niagara7.S
@@ -0,0 +1,980 @@ 
+/* Copy SIZE bytes from SRC to DEST.  For SUN4V M7.
+   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>
+
+#ifndef XCC
+# define XCC    xcc
+#endif
+	.register	%g2,#scratch
+	.register	%g3,#scratch
+	.register	%g6,#scratch
+
+#define	FPRS_FEF	0x04
+
+/*
+ * ASI_STBI_P marks the cache line as "least recently used"
+ * which means if many threads are active, it has a high chance
+ * of being pushed out of the cache between the first initializing
+ * store and the final stores.
+ * Thus, in this algorithm we use ASI_STBIMRU_P which marks the
+ * cache line as "most recently used" for all but the last cache
+ * line.
+ */
+
+#define	ASI_BLK_INIT_QUAD_LDD_P	0xe2
+#define	ASI_ST_BLK_INIT_MRU_P	0xf2
+
+#define	ASI_STBI_P	ASI_BLK_INIT_QUAD_LDD_P
+#define	ASI_STBIMRU_P	ASI_ST_BLK_INIT_MRU_P
+
+#define	BLOCK_SIZE	64	/* L2 data cache line size  */
+#define	SHORTCOPY	3
+#define	SHORTCHECK	14
+#define	SHORT_LONG	64	/* max copy for short longword-aligned case  */
+				/* must be at least 64  */
+#define	SMALL_MAX	255	/* max small copy for word/long aligned  */
+#define	SMALL_UMAX	128	/* max small copy for unaligned case  */
+#define	MED_WMAX	1023	/* max copy for medium word-aligned case  */
+#define	MED_MAX		511	/* max copy for medium longword-aligned case  */
+#define	ST_CHUNK	20	/* ST_CHUNK - block of values for BIS Store  */
+/* on T4, prefetch 20 is a strong read prefetch to L1 and L2 data cache
+ * prefetch 20 can cause inst pipeline to delay if data is in memory
+ * prefetch 21 is a strong read prefetch to L2 data cache, not L1 data cache  */
+#define	ALIGN_PRE	20	/* distance for aligned prefetch loop  */
+
+#define EX_ST(x)	x
+#define EX_RETVAL(x)	x
+#define STORE_ASI(src,addr)	stxa src, [addr] ASI_STBIMRU_P
+#define STORE_INIT(src,addr)	stxa src, [addr] ASI_STBI_P
+
+#if IS_IN (libc)
+
+	.text
+
+ENTRY(__memmove_niagara7)
+	/* %o0=dst, %o1=src, %o2=len */
+	cmp	%o1, %o0	/* if from address is >= to use forward copy  */
+	bgeu,pn	%XCC, .Lforcpy	/* else use backward if ...  */
+	 sub	%o0, %o1, %o4	/* get difference of two addresses  */
+	cmp	%o2, %o4	/* compare size and difference of addresses  */
+	bleu,pn	%XCC, .Lforcpy	/* if size is bigger, do overlapped copy  */
+	 add	%o1, %o2, %o5	/* get to end of source space  */
+
+/* an overlapped copy that must be done "backwards"  */
+.Lchksize:
+	cmp	%o2, 8			/* less than 8 byte do byte copy  */
+	blu,pn %XCC, 2f			/* else continue  */
+
+/* Now size is bigger than 8  */
+.Ldbalign:
+	 add	%o0, %o2, %g1		/* get to end of dest space  */
+	andcc	%g1, 7, %o3		/* %o3 has cnt til dst 8 byte align  */
+	bz,a,pn	%XCC, .Ldbbck		/* skip if dst is 8 byte aligned  */
+	 andn	%o2, 7, %o3		/* force %o3 cnt to multiple of 8  */
+	sub	%o2, %o3, %o2		/* update o2 with new count  */
+
+1:	dec	%o5			/* decrement source  */
+	ldub	[%o5], %g1		/* load one byte  */
+	deccc	%o3			/* decrement count  */
+	bgu,pt	%XCC, 1b		/* if not done keep copying  */
+	 stb	%g1, [%o5+%o4]		/* store one byte into dest  */
+	andncc	%o2, 7, %o3		/* force %o3 cnt to multiple of 8  */
+	bz,pn	%XCC, 2f		/* if size < 8, move to byte copy  */
+
+/* Now Destination is 8 byte aligned  */
+.Ldbbck:
+	 andcc	%o5, 7, %o0		/* %o0 has src offset  */
+	bz,a,pn	%XCC, .Ldbcopybc	/* if src is aligned do fast memmove  */
+	 sub	%o2, %o3, %o2		/* Residue bytes in %o2  */
+
+.Lcpy_dbwdbc:				/* alignment of src is needed  */
+	sub	%o2, 8, %o2		/* set size one loop ahead  */
+	sll	%o0, 3, %g1		/* %g1 is left shift  */
+	mov	64, %g5			/* init %g5 to be 64  */
+	sub	%g5, %g1, %g5		/* %g5 rightshift = (64 - leftshift)  */
+	sub	%o5, %o0, %o5		/* align the src at 8 bytes.  */
+	add	%o4, %o0, %o4		/* increase diff between src & dst  */
+	ldx	[%o5], %o1		/* load first 8 bytes  */
+	srlx	%o1, %g5, %o1
+1:	sub	%o5, 8, %o5		/* subtract 8 from src  */
+	ldx	[%o5], %o0		/* load 8 byte  */
+	sllx	%o0, %g1, %o3		/* shift loaded val left to tmp reg  */
+	or	%o1, %o3, %o3		/* align data  */
+	stx	%o3, [%o5+%o4]		/* store 8 byte  */
+	subcc	%o2, 8, %o2		/* subtract 8 byte from size  */
+	bg,pt	%XCC, 1b		/* if size > 0 continue  */
+	 srlx	%o0, %g5, %o1		/* move extra byte for the next use  */
+
+	srl	%g1, 3, %o0		/* restore %o0 value for alignment  */
+	add	%o5, %o0, %o5		/* restore src alignment  */
+	sub	%o4, %o0, %o4		/* restore diff between src & dest  */
+
+	ba	2f			/* branch to the trailing byte copy  */
+	 add	%o2, 8, %o2		/* restore size value  */
+
+.Ldbcopybc:				/* alignment of src is not needed  */
+1:	sub	%o5, 8, %o5		/* subtract from src  */
+	ldx	[%o5], %g1		/* load 8 bytes  */
+	subcc	%o3, 8, %o3		/* subtract from size  */
+	bgu,pt	%XCC, 1b		/* if size is bigger 0 continue  */
+	 stx	%g1, [%o5+%o4]		/* store 8 bytes to destination  */
+
+	ba	2f
+	 nop
+
+.Lbcbyte:
+1:	ldub	[%o5], %g1		/* load one byte  */
+	stb	%g1, [%o5+%o4]		/* store one byte  */
+2:	deccc	%o2			/* decrement size  */
+	bgeu,a,pt %XCC, 1b		/* if size is >= 0 continue  */
+	 dec	%o5			/* decrement from address  */
+
+.Lexitbc:				/* exit from backward copy  */
+	retl
+	 add	%o5, %o4, %o0		/* restore dest addr  */
+
+
+/* Check to see if memmove is large aligned copy
+ * If so, use special version of copy that avoids
+ * use of block store init.  */
+.Lforcpy:
+	cmp	%o2, SMALL_MAX		/* check for not small case  */
+	blt,pn	%XCC, .Lmv_short	/* merge with memcpy  */
+	 mov	%o0, %g1		/* save %o0  */
+	neg	%o0, %o5
+	andcc	%o5, 7, %o5		/* bytes till DST 8 byte aligned  */
+	brz,pt	%o5, .Lmv_dst_aligned_on_8
+
+/* %o5 has the bytes to be written in partial store.  */
+	 sub	%o2, %o5, %o2
+	sub	%o1, %o0, %o1		/* %o1 gets the difference  */
+7:					/* dst aligning loop  */
+	ldub	[%o1+%o0], %o4		/* load one byte  */
+	subcc	%o5, 1, %o5
+	stb	%o4, [%o0]
+	bgu,pt	%XCC, 7b
+	 add	%o0, 1, %o0		/* advance dst  */
+	add	%o1, %o0, %o1		/* restore %o1  */
+.Lmv_dst_aligned_on_8:
+	andcc	%o1, 7, %o5
+	brnz,pn	%o5, .Lsrc_dst_unaligned_on_8
+	 prefetch [%o1 + (1 * BLOCK_SIZE)], 20
+
+.Lmv_src_dst_aligned_on_8:
+/* check if we are copying MED_MAX or more bytes  */
+	cmp	%o2, MED_MAX		/* limit to store buffer size  */
+	bleu,pt	%XCC, .Lmedlong
+	 prefetch [%o1 + (2 * BLOCK_SIZE)], 20
+
+/* The mv_align loop below mimics the memcpy code for large aligned copies,
+ * but does not use the ASI_STBI_P (block initializing store) performance
+ * optimization.  This is used when memcpy is incorrectly invoked with
+ * overlapping buffers.  */
+
+.Lmv_large_align8_copy:			/* Src and dst share 8 byte align  */
+					/* align dst to 64 byte boundary  */
+	andcc	%o0, 0x3f, %o3		/* check for dst 64 byte aligned  */
+	brz,pn	%o3, .Lmv_aligned_on_64
+	 sub	%o3, 64, %o3		/* %o3 has negative bytes to move  */
+	add	%o2, %o3, %o2		/* adjust remaining count  */
+.Lmv_align_to_64:
+	ldx	[%o1], %o4
+	add	%o1, 8, %o1		/* increment src ptr  */
+	addcc	%o3, 8, %o3
+	stx	%o4, [%o0]
+	brnz,pt	%o3, .Lmv_align_to_64
+	 add	%o0, 8, %o0		/* increment dst ptr  */
+
+.Lmv_aligned_on_64:
+	andn	%o2, 0x3f, %o5		/* %o5 is multiple of block size  */
+	and	%o2, 0x3f, %o2		/* residue bytes in %o2  */
+.Lmv_align_loop:
+	ldx	[%o1],%o4
+	stx	%o4,[%o0]
+	prefetch [%o0 + (10 * BLOCK_SIZE)], 22
+	prefetch [%o1 + (10 * BLOCK_SIZE)], 21
+	subcc	%o5, 64, %o5
+	ldx	[%o1+8],%o4
+	stx	%o4,[%o0+8]
+	ldx	[%o1+16],%o4
+	stx	%o4,[%o0+16]
+	ldx	[%o1+24],%o4
+	stx	%o4,[%o0+24]
+	ldx	[%o1+32],%o4
+	stx	%o4,[%o0+32]
+	ldx	[%o1+40],%o4
+	stx	%o4,[%o0+40]
+	ldx	[%o1+48],%o4
+	add	%o1, 64, %o1
+	stx	%o4,[%o0+48]
+	add	%o0, 64, %o0
+	ldx	[%o1-8],%o4
+	bgt,pt	%XCC, .Lmv_align_loop
+	 stx	%o4,[%o0-8]
+
+	ba	.Lmedlong
+	 nop
+END(__memmove_niagara7)
+
+ENTRY(__mempcpy_niagara7)
+	/* %o0=dst, %o1=src, %o2=len */
+	ba,pt	%icc, 101f
+	 add	%o0, %o2, %g1		/* save dst + len  */
+END(__mempcpy_niagara7)
+
+	.align	32
+ENTRY(__memcpy_niagara7)
+100:	/* %o0=dst, %o1=src, %o2=len */
+	mov	%o0, %g1		/* save %o0  */
+101:
+#ifndef __arch64__
+	srl	%o2, 0, %o2
+#endif
+	cmp	%o2, SMALL_MAX		/* check for not small case  */
+	bgeu,pn	%XCC, .Lmedium		/* go to larger cases  */
+.Lmv_short:
+	 cmp	%o2, SHORTCOPY		/* check for really short case  */
+	ble,pn	%XCC, .Lsmallfin
+	 or	%o0, %o1, %o4		/* prepare alignment check  */
+	andcc	%o4, 0x3, %o5		/* test for word alignment  */
+	bnz,pn	%XCC, .Lsmallunalign	/* branch to non-word aligned case  */
+	 nop
+	subcc	%o2, 7, %o2		/* adjust count  */
+	ble,pn	%XCC, .Lsmallwordx
+	 andcc	%o4, 0x7, %o5		/* test for long alignment  */
+/* 8 or more bytes, src and dest start on word boundary
+ * %o4 contains or %o0, %o1  */
+.Lsmalllong:
+	bnz,pn	%XCC, .Lsmallwords	/* branch to word aligned case  */
+	 cmp	%o2, SHORT_LONG-7
+	bge,a	%XCC, .Lmedl64		/* if we branch  */
+	 sub	%o2,56,%o2		/* adjust %o2 to -63 off count  */
+
+/* slightly unroll the small_long_loop to improve very short copies  */
+	cmp	%o2, 32-7
+	blt,a,pn %XCC, .Lsmall_long_l
+	 sub	%o1, %o0, %o1		/* %o1 gets the difference  */
+
+	ldx	[%o1], %o5
+	ldx	[%o1+8], %o4
+	ldx	[%o1+16], %o3
+
+	subcc	%o2, 24, %o2
+	sub	%o1, %o0, %o1		/* %o1 gets the difference  */
+
+	stx	%o5, [%o0]		/* write word  */
+	stx	%o4, [%o0+8]		/* write word  */
+	stx	%o3, [%o0+16]		/* write word  */
+
+	add	%o0, 24, %o0
+
+/* end loop unroll  */
+
+.Lsmall_long_l:
+	ldx	[%o1+%o0], %o3
+	subcc	%o2, 8, %o2
+	add	%o0, 8, %o0
+	bgu,pn	%XCC, .Lsmall_long_l	/* loop until done  */
+	 stx	%o3, [%o0-8]		/* write word  */
+	addcc	%o2, 7, %o2		/* restore %o2 to correct count  */
+	bnz,pn	%XCC, .Lsmall_long_x	/* check for completion  */
+	 add	%o1, %o0, %o1		/* restore %o1  */
+	retl
+	 mov	EX_RETVAL(%g1), %o0	/* restore %o0  */
+.Lsmall_long_x:
+	cmp	%o2, 4			/* check for 4 or more bytes left  */
+	blt,pn	%XCC, .Lsmallleft3	/* if not, go to finish up  */
+	 nop
+	lduw	[%o1], %o3
+	add	%o1, 4, %o1
+	subcc	%o2, 4, %o2
+	stw	%o3, [%o0]
+	bnz,pn	%XCC, .Lsmallleft3
+	 add	%o0, 4, %o0
+	retl
+	 mov	EX_RETVAL(%g1), %o0	/* restore %o0  */
+
+	.align 32
+/* src and dest start on word boundary; 7 or fewer bytes  */
+.Lsmallwordx:
+	lduw	[%o1], %o3		/* read word  */
+	addcc	%o2, 3, %o2		/* restore count  */
+	bz,pt	%XCC, .Lsmallexit
+	 stw	%o3, [%o0]		/* write word  */
+	deccc	%o2			/* reduce count for cc test  */
+	ldub	[%o1+4], %o3		/* load one byte  */
+	bz,pt	%XCC, .Lsmallexit
+	 stb	%o3, [%o0+4]		/* store one byte  */
+	ldub	[%o1+5], %o3		/* load second byte  */
+	deccc	%o2
+	bz,pt	%XCC, .Lsmallexit
+	 stb	%o3, [%o0+5]		/* store second byte  */
+	ldub	[%o1+6], %o3		/* load third byte  */
+	stb	%o3, [%o0+6]		/* store third byte  */
+.Lsmallexit:
+	retl
+	 mov	EX_RETVAL(%g1), %o0	/* restore %o0  */
+
+	.align 32
+.Lsmallunalign:
+	cmp	%o2, SHORTCHECK
+	ble,pn	%XCC, .Lsmallrest
+	 cmp	%o2, SMALL_UMAX
+	bge,pt	%XCC, .Lmedium_join
+	 andcc	%o1, 0x3, %o5		/* is src word aligned  */
+	bz,pn	%XCC, .Laldst
+	 cmp	%o5, 2			/* is src half-word aligned  */
+	be,pt	%XCC, .Ls2algn
+	 cmp	%o5, 3			/* src is byte aligned  */
+.Ls1algn:
+	ldub	[%o1], %o3		/* move 1 or 3 bytes to align it  */
+	inc	1, %o1
+	stb	%o3, [%o0]		/* move a byte to align src  */
+	inc	1, %o0
+	bne,pt	%XCC, .Ls2algn
+	 dec	%o2
+	b	.Lald			/* now go align dest  */
+	 andcc	%o0, 0x3, %o5
+
+.Ls2algn:
+	lduh	[%o1], %o3		/* know src is 2 byte aligned  */
+	inc	2, %o1
+	srl	%o3, 8, %o4
+	stb	%o4, [%o0]		/* have to do bytes,  */
+	stb	%o3, [%o0 + 1]		/* do not know dst alignment  */
+	inc	2, %o0
+	dec	2, %o2
+
+.Laldst:
+	andcc	%o0, 0x3, %o5		/* align the destination address  */
+.Lald:
+	bz,pn	%XCC, .Lw4cp
+	 cmp	%o5, 2
+	be,pn	%XCC, .Lw2cp
+	 cmp	%o5, 3
+.Lw3cp:	lduw	[%o1], %o4
+	inc	4, %o1
+	srl	%o4, 24, %o5
+	stb	%o5, [%o0]
+	bne,pt	%XCC, .Lw1cp
+	 inc	%o0
+	dec	1, %o2
+	andn	%o2, 3, %o3		/* %o3 is aligned word count  */
+	dec	4, %o3			/* avoid reading beyond tail of src  */
+	sub	%o1, %o0, %o1		/*  %o1 gets the difference  */
+
+1:	sll	%o4, 8, %g5		/* save residual bytes  */
+	lduw	[%o1+%o0], %o4
+	deccc	4, %o3
+	srl	%o4, 24, %o5		/* merge with residual  */
+	or	%o5, %g5, %g5
+	st	%g5, [%o0]
+	bnz,pt	%XCC, 1b
+	 inc	4, %o0
+	sub	%o1, 3, %o1		/* used one byte of last word read  */
+	and	%o2, 3, %o2
+	b	7f
+	 inc	4, %o2
+
+.Lw1cp:	srl	%o4, 8, %o5
+	sth	%o5, [%o0]
+	inc	2, %o0
+	dec	3, %o2
+	andn	%o2, 3, %o3		/* %o3 is aligned word count  */
+	dec	4, %o3			/* avoid reading beyond tail of src  */
+	sub	%o1, %o0, %o1		/* %o1 gets the difference  */
+
+2:	sll	%o4, 24, %g5		/* save residual bytes  */
+	lduw	[%o1+%o0], %o4
+	deccc	4, %o3
+	srl	%o4, 8, %o5		/* merge with residual  */
+	or	%o5, %g5, %g5
+	st	%g5, [%o0]
+	bnz,pt	%XCC, 2b
+	 inc	4, %o0
+	sub	%o1, 1, %o1		/* used 3 bytes of last word read  */
+	and	%o2, 3, %o2
+	b	7f
+	 inc	4, %o2
+
+.Lw2cp:	lduw	[%o1], %o4
+	inc	4, %o1
+	srl	%o4, 16, %o5
+	sth	%o5, [%o0]
+	inc	2, %o0
+	dec	2, %o2
+	andn	%o2, 3, %o3		/* %o3 is aligned word count  */
+	dec	4, %o3			/* avoid reading beyond tail of src  */
+	sub	%o1, %o0, %o1		/* %o1 gets the difference  */
+
+3:	sll	%o4, 16, %g5		/* save residual bytes  */
+	lduw	[%o1+%o0], %o4
+	deccc	4, %o3
+	srl	%o4, 16, %o5		/* merge with residual  */
+	or	%o5, %g5, %g5
+	st	%g5, [%o0]
+	bnz,pt	%XCC, 3b
+	 inc	4, %o0
+	sub	%o1, 2, %o1		/* used two bytes of last word read  */
+	and	%o2, 3, %o2
+	b	7f
+	 inc	4, %o2
+
+.Lw4cp:	andn	%o2, 3, %o3		/* %o3 is aligned word count  */
+	sub	%o1, %o0, %o1		/* %o1 gets the difference  */
+
+1:	lduw	[%o1+%o0], %o4		/* read from address  */
+	deccc	4, %o3			/* decrement count  */
+	st	%o4, [%o0]		/* write at destination address  */
+	bgu,pt	%XCC, 1b
+	 inc	4, %o0			/* increment to address  */
+	and	%o2, 3, %o2		/* number of leftover bytes, if any  */
+
+	/* simple finish up byte copy, works with any alignment  */
+7:
+	add	%o1, %o0, %o1		/* restore %o1  */
+.Lsmallrest:
+	tst	%o2
+	bz,pt	%XCC, .Lsmallx
+	 cmp	%o2, 4
+	blt,pn	%XCC, .Lsmallleft3
+	 nop
+	sub	%o2, 3, %o2
+.Lsmallnotalign4:
+	ldub	[%o1], %o3		/* read byte  */
+	subcc	%o2, 4, %o2		/* reduce count by 4  */
+	stb	%o3, [%o0]		/* write byte  */
+	ldub	[%o1+1], %o3		/* repeat for total of 4 bytes  */
+	add	%o1, 4, %o1		/* advance SRC by 4  */
+	stb	%o3, [%o0+1]
+	ldub	[%o1-2], %o3
+	add	%o0, 4, %o0		/* advance DST by 4  */
+	stb	%o3, [%o0-2]
+	ldub	[%o1-1], %o3
+	bgu,pt	%XCC, .Lsmallnotalign4	/* loop til 3 or fewer bytes remain  */
+	 stb	%o3, [%o0-1]
+	addcc	%o2, 3, %o2		/* restore count  */
+	bz,pt	%XCC, .Lsmallx
+.Lsmallleft3:				/* 1, 2, or 3 bytes remain  */
+	 subcc	%o2, 1, %o2
+	ldub	[%o1], %o3		/* load one byte  */
+	bz,pt	%XCC, .Lsmallx
+	 stb	%o3, [%o0]		/* store one byte  */
+	ldub	[%o1+1], %o3		/* load second byte  */
+	subcc	%o2, 1, %o2
+	bz,pt	%XCC, .Lsmallx
+	 stb	%o3, [%o0+1]		/* store second byte  */
+	ldub	[%o1+2], %o3		/* load third byte  */
+	stb	%o3, [%o0+2]		/* store third byte  */
+.Lsmallx:
+	retl
+	 mov	EX_RETVAL(%g1), %o0	/* restore %o0  */
+
+.Lsmallfin:
+	tst	%o2
+	bnz,pn	%XCC, .Lsmallleft3
+	 nop
+	retl
+	 mov	EX_RETVAL(%g1), %o0	/* restore %o0  */
+
+	.align 16
+.Lsmallwords:
+	lduw	[%o1], %o3		/* read word  */
+	subcc	%o2, 8, %o2		/* update count  */
+	stw	%o3, [%o0]		/* write word  */
+	add	%o1, 8, %o1		/* update SRC  */
+	lduw	[%o1-4], %o3		/* read word  */
+	add	%o0, 8, %o0		/* update DST  */
+	bgu,pt	%XCC, .Lsmallwords	/* loop until done  */
+	 stw	%o3, [%o0-4]		/* write word  */
+	addcc	%o2, 7, %o2		/* restore count  */
+	bz,pt	%XCC, .Lsmallexit	/* check for completion  */
+	 cmp	%o2, 4			/* check for 4 or more bytes left  */
+	blt,pt	%XCC, .Lsmallleft3	/* if not, go to finish up  */
+	 nop
+	lduw	[%o1], %o3
+	add	%o1, 4, %o1
+	subcc	%o2, 4, %o2
+	add	%o0, 4, %o0
+	bnz,pn	%XCC, .Lsmallleft3
+	 stw	%o3, [%o0-4]
+	retl
+	 mov	EX_RETVAL(%g1), %o0	/* restore %o0  */
+
+	.align 16
+.Lmedium:
+.Lmedium_join:
+	neg	%o0, %o5
+	andcc	%o5, 7, %o5		/* bytes till DST 8 byte aligned  */
+	brz,pt	%o5, .Ldst_aligned_on_8
+
+	/* %o5 has the bytes to be written in partial store.  */
+	 sub	%o2, %o5, %o2
+	sub	%o1, %o0, %o1		/* %o1 gets the difference  */
+7:					/* dst aligning loop  */
+	ldub	[%o1+%o0], %o4		/* load one byte  */
+	subcc	%o5, 1, %o5
+	stb	%o4, [%o0]
+	bgu,pt	%XCC, 7b
+	 add	%o0, 1, %o0		/* advance dst  */
+	add	%o1, %o0, %o1		/* restore %o1  */
+.Ldst_aligned_on_8:
+	andcc	%o1, 7, %o5
+	brnz,pt	%o5, .Lsrc_dst_unaligned_on_8
+	 nop
+
+.Lsrc_dst_aligned_on_8:
+	/* check if we are copying MED_MAX or more bytes  */
+	cmp	%o2, MED_MAX		/* limit to store buffer size  */
+	bgu,pn	%XCC, .Llarge_align8_copy
+	 nop
+/*
+ * Special case for handling when src and dest are both long word aligned
+ * and total data to move is less than MED_MAX bytes
+ */
+.Lmedlong:
+	subcc	%o2, 63, %o2		/* adjust length to allow cc test  */
+	ble,pn	%XCC, .Lmedl63		/* skip big loop if < 64 bytes  */
+	 nop
+.Lmedl64:
+	ldx	[%o1], %o4		/* load  */
+	subcc	%o2, 64, %o2		/* decrement length count  */
+	stx	%o4, [%o0]		/* and store  */
+	ldx	[%o1+8], %o3		/* a block of 64 bytes  */
+	stx	%o3, [%o0+8]
+	ldx	[%o1+16], %o4
+	stx	%o4, [%o0+16]
+	ldx	[%o1+24], %o3
+	stx	%o3, [%o0+24]
+	ldx	[%o1+32], %o4		/* load  */
+	stx	%o4, [%o0+32]		/* and store  */
+	ldx	[%o1+40], %o3		/* a block of 64 bytes  */
+	add	%o1, 64, %o1		/* increase src ptr by 64  */
+	stx	%o3, [%o0+40]
+	ldx	[%o1-16], %o4
+	add	%o0, 64, %o0		/* increase dst ptr by 64  */
+	stx	%o4, [%o0-16]
+	ldx	[%o1-8], %o3
+	bgu,pt	%XCC, .Lmedl64		/* repeat if at least 64 bytes left  */
+	 stx	%o3, [%o0-8]
+.Lmedl63:
+	addcc	%o2, 32, %o2		/* adjust remaining count  */
+	ble,pt	%XCC, .Lmedl31		/* to skip if 31 or fewer bytes left  */
+	 nop
+	ldx	[%o1], %o4		/* load  */
+	sub	%o2, 32, %o2		/* decrement length count  */
+	stx	%o4, [%o0]		/* and store  */
+	ldx	[%o1+8], %o3		/* a block of 32 bytes  */
+	add	%o1, 32, %o1		/* increase src ptr by 32  */
+	stx	%o3, [%o0+8]
+	ldx	[%o1-16], %o4
+	add	%o0, 32, %o0		/* increase dst ptr by 32  */
+	stx	%o4, [%o0-16]
+	ldx	[%o1-8], %o3
+	stx	%o3, [%o0-8]
+.Lmedl31:
+	addcc	%o2, 16, %o2		/* adjust remaining count  */
+	ble,pt	%XCC, .Lmedl15		/* skip if 15 or fewer bytes left  */
+	 nop
+	ldx	[%o1], %o4		/* load and store 16 bytes  */
+	add	%o1, 16, %o1		/* increase src ptr by 16  */
+	stx	%o4, [%o0]
+	sub	%o2, 16, %o2		/* decrease count by 16  */
+	ldx	[%o1-8], %o3
+	add	%o0, 16, %o0		/* increase dst ptr by 16  */
+	stx	%o3, [%o0-8]
+.Lmedl15:
+	addcc	%o2, 15, %o2		/* restore count  */
+	bz,pt	%XCC, .Lsmallexit	/* exit if finished  */
+	 cmp	%o2, 8
+	blt,pt	%XCC, .Lmedw7		/* skip if 7 or fewer bytes left  */
+	 tst	%o2
+	ldx	[%o1], %o4		/* load 8 bytes  */
+	add	%o1, 8, %o1		/* increase src ptr by 8  */
+	add	%o0, 8, %o0		/* increase dst ptr by 8  */
+	subcc	%o2, 8, %o2		/* decrease count by 8  */
+	bnz,pn	%XCC, .Lmedw7
+	 stx	%o4, [%o0-8]		/* and store 8 bytes  */
+	retl
+	 mov	EX_RETVAL(%g1), %o0	/* restore %o0  */
+
+	.align 16
+.Lsrc_dst_unaligned_on_8:
+	/* DST is 8-byte aligned, src is not  */
+	andcc	%o1, 0x3, %o5		/* test word alignment  */
+	bnz,pt	%XCC, .Lunalignsetup	/* branch if not word aligned  */
+	 nop
+
+/*
+ * Handle all cases where src and dest are aligned on word
+ * boundaries. Use unrolled loops for better performance.
+ * This option wins over standard large data move when
+ * source and destination is in cache for medium
+ * to short data moves.
+ */
+	cmp %o2, MED_WMAX		/* limit to store buffer size  */
+	bge,pt	%XCC, .Lunalignrejoin	/* otherwise rejoin main loop  */
+	 nop
+
+	subcc	%o2, 31, %o2		/* adjust length to allow cc test  */
+					/* for end of loop  */
+	ble,pt	%XCC, .Lmedw31		/* skip big loop if less than 16  */
+.Lmedw32:
+	 ld	[%o1], %o4		/* move a block of 32 bytes  */
+	sllx	%o4, 32, %o5
+	ld	[%o1+4], %o4
+	or	%o4, %o5, %o5
+	stx	%o5, [%o0]
+	subcc	%o2, 32, %o2		/* decrement length count  */
+	ld	[%o1+8], %o4
+	sllx	%o4, 32, %o5
+	ld	[%o1+12], %o4
+	or	%o4, %o5, %o5
+	stx	%o5, [%o0+8]
+	add	%o1, 32, %o1		/* increase src ptr by 32  */
+	ld	[%o1-16], %o4
+	sllx	%o4, 32, %o5
+	ld	[%o1-12], %o4
+	or	%o4, %o5, %o5
+	stx	%o5, [%o0+16]
+	add	%o0, 32, %o0		/* increase dst ptr by 32  */
+	ld	[%o1-8], %o4
+	sllx	%o4, 32, %o5
+	ld	[%o1-4], %o4
+	or	%o4, %o5, %o5
+	bgu,pt	%XCC, .Lmedw32		/* repeat if at least 32 bytes left  */
+	 stx	%o5, [%o0-8]
+.Lmedw31:
+	addcc	%o2, 31, %o2		/* restore count  */
+	bz,pt	%XCC, .Lsmallexit	/* exit if finished  */
+	 cmp	%o2, 16
+	blt,pt	%XCC, .Lmedw15
+	 nop
+	ld	[%o1], %o4		/* move a block of 16 bytes  */
+	sllx	%o4, 32, %o5
+	subcc	%o2, 16, %o2		/* decrement length count  */
+	ld	[%o1+4], %o4
+	or	%o4, %o5, %o5
+	stx	%o5, [%o0]
+	add	%o1, 16, %o1		/* increase src ptr by 16  */
+	ld	[%o1-8], %o4
+	add	%o0, 16, %o0		/* increase dst ptr by 16  */
+	sllx	%o4, 32, %o5
+	ld	[%o1-4], %o4
+	or	%o4, %o5, %o5
+	stx	%o5, [%o0-8]
+.Lmedw15:
+	bz,pt	%XCC, .Lsmallexit	/* exit if finished  */
+	 cmp	%o2, 8
+	blt,pn	%XCC, .Lmedw7		/* skip if 7 or fewer bytes left  */
+	 tst	%o2
+	ld	[%o1], %o4		/* load 4 bytes  */
+	subcc	%o2, 8, %o2		/* decrease count by 8  */
+	stw	%o4, [%o0]		/* and store 4 bytes  */
+	add	%o1, 8, %o1		/* increase src ptr by 8  */
+	ld	[%o1-4], %o3		/* load 4 bytes  */
+	add	%o0, 8, %o0		/* increase dst ptr by 8  */
+	stw	%o3, [%o0-4]		/* and store 4 bytes  */
+	bz,pt	%XCC, .Lsmallexit	/* exit if finished  */
+.Lmedw7:				/* count is ge 1, less than 8  */
+	 cmp	%o2, 4			/* check for 4 bytes left  */
+	blt,pn	%XCC, .Lsmallleft3	/* skip if 3 or fewer bytes left  */
+	 nop
+	ld	[%o1], %o4		/* load 4 bytes  */
+	add	%o1, 4, %o1		/* increase src ptr by 4  */
+	add	%o0, 4, %o0		/* increase dst ptr by 4  */
+	subcc	%o2, 4, %o2		/* decrease count by 4  */
+	bnz,pt	%XCC, .Lsmallleft3
+	 stw	%o4, [%o0-4]		/* and store 4 bytes  */
+	retl
+	 mov	EX_RETVAL(%g1), %o0	/* restore %o0  */
+
+	.align 16
+.Llarge_align8_copy:			/* Src and dst 8 byte aligned  */
+	/* align dst to 64 byte boundary  */
+	andcc	%o0, 0x3f, %o3		/* check for dst 64 byte aligned  */
+	brz,pn	%o3, .Laligned_to_64
+	 andcc	%o0, 8, %o3		/* odd long words to move?  */
+	brz,pt	%o3, .Laligned_to_16
+	 nop
+	ldx	[%o1], %o4
+	sub	%o2, 8, %o2
+	add	%o1, 8, %o1		/* increment src ptr  */
+	add	%o0, 8, %o0		/* increment dst ptr  */
+	stx	%o4, [%o0-8]
+.Laligned_to_16:
+	andcc	%o0, 16, %o3		/* pair of long words to move?  */
+	brz,pt	%o3, .Laligned_to_32
+	 nop
+	ldx	[%o1], %o4
+	sub	%o2, 16, %o2
+	stx	%o4, [%o0]
+	add	%o1, 16, %o1		/* increment src ptr  */
+	ldx	[%o1-8], %o4
+	add	%o0, 16, %o0		/* increment dst ptr  */
+	stx	%o4, [%o0-8]
+.Laligned_to_32:
+	andcc	%o0, 32, %o3		/* four long words to move?  */
+	brz,pt	%o3, .Laligned_to_64
+	 nop
+	ldx	[%o1], %o4
+	sub	%o2, 32, %o2
+	stx	%o4, [%o0]
+	ldx	[%o1+8], %o4
+	stx	%o4, [%o0+8]
+	ldx	[%o1+16], %o4
+	stx	%o4, [%o0+16]
+	add	%o1, 32, %o1		/* increment src ptr  */
+	ldx	[%o1-8], %o4
+	add	%o0, 32, %o0		/* increment dst ptr  */
+	stx	%o4, [%o0-8]
+.Laligned_to_64:
+/*	Following test is included to avoid issues where existing executables
+ *	incorrectly call memcpy with overlapping src and dest instead of memmove
+ *
+ *	if ( (src ge dst) and (dst+len > src)) go to overlap case
+ *	if ( (src lt dst) and (src+len > dst)) go to overlap case
+ */
+	cmp	%o1,%o0
+	bge,pt	%XCC, 1f
+	 nop
+/*				src+len > dst?  */
+	add	%o1, %o2, %o4
+	cmp	%o4, %o0
+	bgt,pt	%XCC, .Lmv_aligned_on_64
+	 nop
+	ba	2f
+	 nop
+1:
+/*				dst+len > src?  */
+	add	%o0, %o2, %o4
+	cmp	%o4, %o1
+	bgt,pt	%XCC, .Lmv_aligned_on_64
+	 nop
+2:
+/*	handle non-overlapped copies
+ *
+ *	Using block init store (BIS) instructions to avoid fetching cache
+ *	lines from memory. Use ST_CHUNK stores to first element of each cache
+ *	line (similar to prefetching) to avoid overfilling STQ or miss buffers.
+ *	Gives existing cache lines time to be moved out of L1/L2/L3 cache.
+ */
+	andn	%o2, 0x3f, %o5		/* %o5 is multiple of block size  */
+	and	%o2, 0x3f, %o2		/* residue bytes in %o2  */
+
+/*	We use ASI_STBIMRU_P for the first store to each cache line
+ *	followed by ASI_STBI_P (mark as LRU) for the last store. That
+ *	mixed approach reduces the chances the cache line is removed
+ *	before we finish setting it, while minimizing the effects on
+ *	other cached values during a large memcpy
+ *
+ *	Intermediate stores can be normal since first BIS activates the
+ *	cache line in the L2 cache.
+ *
+ *	ST_CHUNK batches up initial BIS operations for several cache lines
+ *	to allow multiple requests to not be blocked by overflowing the
+ *	the store miss buffer. Then the matching stores for all those
+ *	BIS operations are executed.
+ */
+
+.Lalign_loop:
+	cmp	%o5, ST_CHUNK*64
+	blu,pt	%XCC, .Lalign_short
+	 mov	ST_CHUNK, %o3
+	sllx	%o3, 6, %g5		/* ST_CHUNK*64  */
+
+.Lalign_loop_start:
+	prefetch [%o1 + (ALIGN_PRE * BLOCK_SIZE)], 21
+	subcc	%o3, 2, %o3
+	ldx	[%o1], %o4
+	add	%o1, 128, %o1
+	EX_ST(STORE_ASI(%o4, %o0))
+	add	%o0, 64, %o0
+	ldx	[%o1-64], %o4
+	EX_ST(STORE_ASI(%o4, %o0))
+	add	%o0, 64, %o0
+	bgu,pt	%XCC, .Lalign_loop_start
+	 prefetch [%o1 + ((ALIGN_PRE-1) * BLOCK_SIZE)], 21
+
+	mov	ST_CHUNK, %o3
+	sub	%o1, %g5, %o1		/* reset %o1  */
+	sub	%o0, %g5, %o0		/* reset %o0  */
+
+	sub	%o0, 8, %o0		/* adjust %o0 for ASI alignment  */
+.Lalign_loop_rest:
+	ldx	[%o1+8],%o4
+	add	%o0, 64, %o0
+	stx	%o4, [%o0-48]
+	subcc	%o3, 1, %o3
+	ldx	[%o1+16],%o4
+	stx	%o4, [%o0-40]
+	sub	%o5, 64, %o5
+	ldx	[%o1+24],%o4
+	stx	%o4, [%o0-32]
+	ldx	[%o1+32],%o4
+	stx	%o4, [%o0-24]
+	ldx	[%o1+40],%o4
+	stx	%o4, [%o0-16]
+	ldx	[%o1+48],%o4
+	stx	%o4, [%o0-8]
+	add	%o1, 64, %o1
+	ldx	[%o1-8],%o4
+	bgu,pt	%XCC, .Lalign_loop_rest
+	 EX_ST(STORE_INIT(%o4,%o0))	/* mark cache line as LRU  */
+
+	mov	ST_CHUNK, %o3
+	cmp	%o5, ST_CHUNK*64
+	bgu,pt	%XCC, .Lalign_loop_start
+	 add	%o0, 8, %o0		/* restore %o0 from ASI alignment  */
+
+	cmp	%o5, 0
+	beq,pt	%XCC, .Lalign_done
+
+/* no prefetches needed in these loops
+ * since we are within ALIGN_PRE of the end */
+.Lalign_short:
+	 srl	%o5, 6, %o3
+.Lalign_loop_short:
+	subcc	%o3, 1, %o3
+	ldx	[%o1], %o4
+	add	%o1, 64, %o1
+	EX_ST(STORE_ASI(%o4, %o0))
+	bgu,pt	%XCC, .Lalign_loop_short
+	 add	%o0, 64, %o0
+
+	sub	%o1, %o5, %o1		/* reset %o1  */
+	sub	%o0, %o5, %o0		/* reset %o0  */
+
+	sub	%o0, 8, %o0		/* adjust %o0 for ASI alignment  */
+.Lalign_short_rest:
+	ldx	[%o1+8],%o4
+	add	%o0, 64, %o0
+	stx	%o4, [%o0-48]
+	ldx	[%o1+16],%o4
+	subcc	%o5, 64, %o5
+	stx	%o4, [%o0-40]
+	ldx	[%o1+24],%o4
+	stx	%o4, [%o0-32]
+	ldx	[%o1+32],%o4
+	stx	%o4, [%o0-24]
+	ldx	[%o1+40],%o4
+	stx	%o4, [%o0-16]
+	ldx	[%o1+48],%o4
+	stx	%o4, [%o0-8]
+	add	%o1, 64, %o1
+	ldx	[%o1-8],%o4
+	bgu,pt	%XCC, .Lalign_short_rest
+	 EX_ST(STORE_INIT(%o4,%o0))	/* mark cache line as LRU  */
+
+	add	%o0, 8, %o0		/* restore %o0 from ASI alignment  */
+
+.Lalign_done:
+	cmp	%o2, 0
+	membar	#StoreStore
+	bne,pt	%XCC, .Lmedl63
+	 subcc	%o2, 63, %o2		/* adjust length to allow cc test  */
+	retl
+	 mov	EX_RETVAL(%g1), %o0	/* restore %o0  */
+
+	.align 16
+	/* Dst is on 8 byte boundary; src is not; remaining cnt > SMALL_MAX  */
+	/* Since block load/store and BIS are not in use for unaligned data,
+	 * no need to align dst on 64 byte cache line boundary  */
+.Lunalignsetup:
+.Lunalignrejoin:
+	rd	%fprs, %g5		/* check for unused fp  */
+	/* if fprs.fef == 0, set it.
+	 * Setting it when already set costs more than checking */
+	andcc	%g5, FPRS_FEF, %g5	/* test FEF, fprs.du = fprs.dl = 0  */
+	bz,a	%XCC, 1f
+	 wr	%g0, FPRS_FEF, %fprs	/* fprs.fef = 1  */
+1:
+	andn	%o2, 0x3f, %o5		/* %o5 is multiple of block size  */
+	and	%o2, 0x3f, %o2		/* residue bytes in %o2  */
+	cmp	%o2, 8			/* Insure we do not load beyond  */
+	bgt,pt	%XCC, .Lunalign_adjust	/* end of source buffer  */
+	 andn	%o1, 0x7, %o4		/* %o4 has 8 byte aligned src addr  */
+	add	%o2, 64, %o2		/* adjust to leave loop  */
+	sub	%o5, 64, %o5		/* early if necessary  */
+.Lunalign_adjust:
+	alignaddr %o1, %g0, %g0		/* generate %gsr  */
+	add	%o1, %o5, %o1		/* advance %o1 to after blocks  */
+	ldd	[%o4], %f0
+.Lunalign_loop:
+	prefetch [%o0 + (9 * BLOCK_SIZE)], 20
+	ldd	[%o4+8], %f2
+	faligndata %f0, %f2, %f16
+	ldd	[%o4+16], %f4
+	subcc	%o5, BLOCK_SIZE, %o5
+	std	%f16, [%o0]
+	faligndata %f2, %f4, %f18
+	ldd	[%o4+24], %f6
+	std	%f18, [%o0+8]
+	faligndata %f4, %f6, %f20
+	ldd	[%o4+32], %f8
+	std	%f20, [%o0+16]
+	faligndata %f6, %f8, %f22
+	ldd	[%o4+40], %f10
+	std	%f22, [%o0+24]
+	faligndata %f8, %f10, %f24
+	ldd	[%o4+48], %f12
+	std	%f24, [%o0+32]
+	faligndata %f10, %f12, %f26
+	ldd	[%o4+56], %f14
+	add	%o4, BLOCK_SIZE, %o4
+	std	%f26, [%o0+40]
+	faligndata %f12, %f14, %f28
+	ldd	[%o4], %f0
+	std	%f28, [%o0+48]
+	faligndata %f14, %f0, %f30
+	std	%f30, [%o0+56]
+	add	%o0, BLOCK_SIZE, %o0
+	bgu,pt	%XCC, .Lunalign_loop
+	 prefetch [%o4 + (11 * BLOCK_SIZE)], 20
+
+	/* Handle trailing bytes, 64 to 127
+	 * Dest long word aligned, Src not long word aligned  */
+	cmp	%o2, 15
+	bleu,pt	%XCC, .Lunalign_short
+
+	 andn	%o2, 0x7, %o5		/* %o5 is multiple of 8  */
+	and	%o2, 0x7, %o2		/* residue bytes in %o2  */
+	add	%o2, 8, %o2
+	sub	%o5, 8, %o5		/* do not load past end of src  */
+	andn	%o1, 0x7, %o4		/* %o4 has 8 byte aligned src addr  */
+	add	%o1, %o5, %o1		/* move %o1 to after multiple of 8  */
+	ldd	[%o4], %f0		/* fetch partial word  */
+.Lunalign_by8:
+	ldd	[%o4+8], %f2
+	add	%o4, 8, %o4
+	faligndata %f0, %f2, %f16
+	subcc	%o5, 8, %o5
+	std	%f16, [%o0]
+	fsrc2	%f2, %f0
+	bgu,pt	%XCC, .Lunalign_by8
+	 add	%o0, 8, %o0
+
+.Lunalign_short:			/* restore fprs state */
+	brnz,pt	%g5, .Lsmallrest
+	 nop
+	ba	.Lsmallrest
+	 wr	%g5, %g0, %fprs
+END(__memcpy_niagara7)
+
+#endif
diff --git a/sysdeps/sparc/sparc64/multiarch/memmove-ultra1.S b/sysdeps/sparc/sparc64/multiarch/memmove-ultra1.S
new file mode 100644
index 0000000..2ed85d9
--- /dev/null
+++ b/sysdeps/sparc/sparc64/multiarch/memmove-ultra1.S
@@ -0,0 +1,4 @@ 
+#define memmove __memmove_ultra1
+#undef libc_hidden_builtin_def
+#define libc_hidden_builtin_def(name)
+#include <sysdeps/sparc/sparc64/memmove.S>
diff --git a/sysdeps/sparc/sparc64/multiarch/memmove.c b/sysdeps/sparc/sparc64/multiarch/memmove.c
new file mode 100644
index 0000000..7e2f1d4
--- /dev/null
+++ b/sysdeps/sparc/sparc64/multiarch/memmove.c
@@ -0,0 +1,33 @@ 
+/* Multiple versions of memmove.
+   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/>.  */
+
+#if IS_IN (libc)
+# define memmove __redirect_memmove
+# include <string.h>
+# undef memmove
+
+# include <sparc-ifunc.h>
+
+# define SYMBOL_NAME memmove
+# include "ifunc-memmove.h"
+
+sparc_libc_ifunc_redirected (__redirect_memmove, memmove, IFUNC_SELECTOR);
+
+sparc_ifunc_redirected_hidden_def (__redirect_memmove, memmove)
+#endif
diff --git a/sysdeps/sparc/sparc64/multiarch/rtld-memmove.c b/sysdeps/sparc/sparc64/multiarch/rtld-memmove.c
new file mode 100644
index 0000000..e6d9a5c
--- /dev/null
+++ b/sysdeps/sparc/sparc64/multiarch/rtld-memmove.c
@@ -0,0 +1 @@ 
+#include <sysdeps/sparc/sparc64/rtld-memmove.c>