File glibc-2.3.3-amd64-string.diff of Package glibc

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File glibc-2.3.3-amd64-string.diff of Package glibc (Revision 2d57cbd995c493f4c0538b15e2473693)

Currently displaying revision 2d57cbd995c493f4c0538b15e2473693 , Show latest

Index: sysdeps/x86_64/dl-machine.h
===================================================================
--- sysdeps/x86_64/dl-machine.h.orig
+++ sysdeps/x86_64/dl-machine.h
@@ -226,6 +226,40 @@ dl_platform_init (void)
   if (GLRO(dl_platform) != NULL && *GLRO(dl_platform) == '\0')
     /* Avoid an empty string which would disturb us.  */
     GLRO(dl_platform) = NULL;
+
+  long int t1, t2;
+  t1 = 0;
+  t2 = 0;
+  
+  asm (
+       "mov	$0x80000000, %%eax		# get highest level of support\n\t"
+       "cpuid\n\t"
+       "cmp     $0x80000006, %%eax	# check for support of cache info\n\t"
+       "jb      1f\n\t"
+       "mov     $0x80000005, %%eax	# get L1 info\n\t"
+       "cpuid\n\t"
+       "shr     $24, %%ecx\n\t"
+       "shl     $10, %%ecx\n\t"
+       "mov     %%rcx, %0\n\t"
+       "mov     $0x80000006, %%eax    	# get L2 info\n\t"
+       "cpuid\n\t"
+       "shr     $16, %%ecx\n\t"
+       "shl     $10, %%ecx\n\t"
+       "mov     %%rcx, %1\n\t"
+       "1:\n\t"
+       :"=r" (t1), "=r" (t2) :: "%rbx", "%rax", "%rcx", "%rdx"
+       );
+
+  if (t1)
+    {
+      GLRO(dl_cache1size) = t1;
+      GLRO(dl_cache1sizehalf) = t1 / 2;
+    }
+  if (t2)
+    {
+      GLRO(dl_cache2size) = t2;
+      GLRO(dl_cache2sizehalf) = t2 / 2;
+    }
 }
 
 static inline Elf64_Addr
Index: sysdeps/x86_64/Makefile
===================================================================
--- sysdeps/x86_64/Makefile.orig
+++ sysdeps/x86_64/Makefile
@@ -4,7 +4,8 @@ long-double-fcts = yes
 ifeq ($(subdir),csu)
 sysdep_routines += hp-timing
 elide-routines.os += hp-timing
-gen-as-const-headers += link-defines.sym
+# get offset to rtld_global._dl_*
+gen-as-const-headers += link-defines.sym rtld-global-offsets.sym
 endif
 
 ifeq ($(subdir),gmon)
Index: sysdeps/x86_64/strcpy.S
===================================================================
--- sysdeps/x86_64/strcpy.S.orig
+++ sysdeps/x86_64/strcpy.S
@@ -1,159 +1,833 @@
-/* strcpy/stpcpy implementation for x86-64.
-   Copyright (C) 2002 Free Software Foundation, Inc.
-   This file is part of the GNU C Library.
-   Contributed by Andreas Jaeger <aj@suse.de>, 2002.
-
-   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, write to the Free
-   Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
-   02111-1307 USA.  */
-
-#include <sysdep.h>
-#include "asm-syntax.h"
-#include "bp-sym.h"
-#include "bp-asm.h"
+# $Header: /K8_Projects/Glibc/amd64strcpy.S 7     2/12/04 19:06 Emenezes $
 
-#ifndef USE_AS_STPCPY
+# (c) 2002 Advanced Micro Devices, Inc.
+# YOUR USE OF THIS CODE IS SUBJECT TO THE TERMS
+# AND CONDITIONS OF THE GNU LESSER GENERAL PUBLIC
+# LICENSE FOUND IN THE "README" FILE THAT IS
+# INCLUDED WITH THIS FILE
+
+#include "sysdep.h"
+#include <rtld-global-offsets.h>
+
+	/* XXX:	strncpy is broken, just use this for strcpy for now.  */
+#ifdef PIC
+	.globl _rtld_local_ro
+        .hidden _rtld_local_ro
+        .set    _rtld_local_ro,_rtld_global_ro
+#endif
+#ifndef STRCPY
 # define STRCPY strcpy
 #endif
+#define LABEL(s) L(strcpy##s)
+
+        .text
+
+ENTRY   (STRCPY)                        # (char *, const char *)
+
+#ifdef USE_AS_STRNCPY			// (char *, const char *, size_t)
+	test	%rdx, %rdx		# (char *, const char *, size_t)
+	mov	%rdx, %r11
+	jz	LABEL(exitn)		# early exit
+#endif
+
+        xor     %edx, %edx
+
+LABEL(aligntry):
+        mov     %rsi, %r8		# align by source
+        and     $7, %r8
+	jz	LABEL(alignafter)
+
+LABEL(align):				# 8-byte align
+        sub     $8, %r8
 
-	.text
-ENTRY (BP_SYM (STRCPY))
-	movq %rsi, %rcx		/* Source register. */
-	andl $7, %ecx		/* mask alignment bits */
-	movq %rdi, %rdx		/* Duplicate destination pointer.  */
-
-	jz 5f			/* aligned => start loop */
-
-	neg %ecx		/* We need to align to 8 bytes.  */
-	addl $8,%ecx
-	/* Search the first bytes directly.  */
-0:
-	movb	(%rsi), %al	/* Fetch a byte */
-	testb	%al, %al	/* Is it NUL? */
-	movb	%al, (%rdx)	/* Store it */
-	jz	4f		/* If it was NUL, done! */
-	incq	%rsi
-	incq	%rdx
-	decl	%ecx
-	jnz	0b
-
-5:
-	movq $0xfefefefefefefeff,%r8
-
-	/* Now the sources is aligned.  Unfortunatly we cannot force
-	   to have both source and destination aligned, so ignore the
-	   alignment of the destination.  */
 	.p2align 4
-1:
-	/* 1st unroll.  */
-	movq	(%rsi), %rax	/* Read double word (8 bytes).  */
-	addq	$8, %rsi	/* Adjust pointer for next word.  */
-	movq	%rax, %r9	/* Save a copy for NUL finding.  */
-	addq	%r8, %r9	/* add the magic value to the word.  We get
-				   carry bits reported for each byte which
-				   is *not* 0 */
-	jnc	3f		/* highest byte is NUL => return pointer */
-	xorq	%rax, %r9	/* (word+magic)^word */
-	orq	%r8, %r9	/* set all non-carry bits */
-	incq	%r9		/* add 1: if one carry bit was *not* set
-				   the addition will not result in 0.  */
-
-	jnz	3f		/* found NUL => return pointer */
-
-	movq	%rax, (%rdx)	/* Write value to destination.  */
-	addq	$8, %rdx	/* Adjust pointer.  */
-
-	/* 2nd unroll.  */
-	movq	(%rsi), %rax	/* Read double word (8 bytes).  */
-	addq	$8, %rsi	/* Adjust pointer for next word.  */
-	movq	%rax, %r9	/* Save a copy for NUL finding.  */
-	addq	%r8, %r9	/* add the magic value to the word.  We get
-				   carry bits reported for each byte which
-				   is *not* 0 */
-	jnc	3f		/* highest byte is NUL => return pointer */
-	xorq	%rax, %r9	/* (word+magic)^word */
-	orq	%r8, %r9	/* set all non-carry bits */
-	incq	%r9		/* add 1: if one carry bit was *not* set
-				   the addition will not result in 0.  */
-
-	jnz	3f		/* found NUL => return pointer */
-
-	movq	%rax, (%rdx)	/* Write value to destination.  */
-	addq	$8, %rdx	/* Adjust pointer.  */
-
-	/* 3rd unroll.  */
-	movq	(%rsi), %rax	/* Read double word (8 bytes).  */
-	addq	$8, %rsi	/* Adjust pointer for next word.  */
-	movq	%rax, %r9	/* Save a copy for NUL finding.  */
-	addq	%r8, %r9	/* add the magic value to the word.  We get
-				   carry bits reported for each byte which
-				   is *not* 0 */
-	jnc	3f		/* highest byte is NUL => return pointer */
-	xorq	%rax, %r9	/* (word+magic)^word */
-	orq	%r8, %r9	/* set all non-carry bits */
-	incq	%r9		/* add 1: if one carry bit was *not* set
-				   the addition will not result in 0.  */
-
-	jnz	3f		/* found NUL => return pointer */
-
-	movq	%rax, (%rdx)	/* Write value to destination.  */
-	addq	$8, %rdx	/* Adjust pointer.  */
-
-	/* 4th unroll.  */
-	movq	(%rsi), %rax	/* Read double word (8 bytes).  */
-	addq	$8, %rsi	/* Adjust pointer for next word.  */
-	movq	%rax, %r9	/* Save a copy for NUL finding.  */
-	addq	%r8, %r9	/* add the magic value to the word.  We get
-				   carry bits reported for each byte which
-				   is *not* 0 */
-	jnc	3f		/* highest byte is NUL => return pointer */
-	xorq	%rax, %r9	/* (word+magic)^word */
-	orq	%r8, %r9	/* set all non-carry bits */
-	incq	%r9		/* add 1: if one carry bit was *not* set
-				   the addition will not result in 0.  */
-
-	jnz	3f		/* found NUL => return pointer */
-
-	movq	%rax, (%rdx)	/* Write value to destination.  */
-	addq	$8, %rdx	/* Adjust pointer.  */
-	jmp	1b		/* Next iteration.  */
 
-	/* Do the last few bytes. %rax contains the value to write.
-	   The loop is unrolled twice.  */
+LABEL(alignloop):
+#ifdef USE_AS_STRNCPY
+	dec	%r11
+	jl	LABEL(exitn)
+#endif
+
+        mov     (%rsi, %rdx), %al       # check if same character
+        test    %al, %al                # check if character a NUL
+        mov     %al, (%rdi, %rdx)
+        jz      LABEL(exit)
+
+        inc     %edx
+        inc     %r8
+        jnz     LABEL(alignloop)
+
 	.p2align 4
+
+LABEL(alignafter):
+
+LABEL(8try):
+        mov     $0xfefefefefefefeff, %rcx
+
+LABEL(8):                               # 8-byte
+        mov     (%rsi, %rdx), %rax
+
+LABEL(8loop):
+#ifdef USE_AS_STRNCPY
+	sub	$8, %r11
+	jl	LABEL(tail)
+#endif
+
+        mov     %rcx, %r8
+        add     %rax, %r8
+        sbb     %r10, %r10
+
+        xor     %rax, %r8
+        or      %rcx, %r8
+        sub     %r10, %r8
+        jnz     LABEL(tail)
+
+        mov     %rax, (%rdi, %rdx)
+        mov     8 (%rsi, %rdx), %rax
+        add     $8, %edx
+
+#ifdef USE_AS_STRNCPY
+	sub	$8, %r11
+	jl	LABEL(tail)
+#endif
+
+        mov     %rcx, %r8
+        add     %rax, %r8
+        sbb     %r10, %r10
+
+        xor     %rax, %r8
+        or      %rcx, %r8
+        sub     %r10, %r8
+        jnz     LABEL(tail)
+
+        mov     %rax, (%rdi, %rdx)
+        mov     8 (%rsi, %rdx), %rax
+        add     $8, %edx
+
+#ifdef USE_AS_STRNCPY
+	sub	$8, %r11
+	jl	LABEL(tail)
+#endif
+
+        mov     %rcx, %r8
+        add     %rax, %r8
+        sbb     %r10, %r10
+
+        xor     %rax, %r8
+        or      %rcx, %r8
+        sub     %r10, %r8
+        jnz     LABEL(tail)
+
+        mov     %rax, (%rdi, %rdx)
+        mov     8 (%rsi, %rdx), %rax
+        add     $8, %edx
+
+#ifdef USE_AS_STRNCPY
+	sub	$8, %r11
+	jl	LABEL(tail)
+#endif
+
+        mov     %rcx, %r8
+        add     %rax, %r8
+        sbb     %r10, %r10
+
+        xor     %rax, %r8
+        or      %rcx, %r8
+        sub     %r10, %r8
+        jnz     LABEL(tail)
+
+        mov     %rax, (%rdi, %rdx)
+        mov     8 (%rsi, %rdx), %rax
+        add     $8, %edx
+
+#ifdef USE_AS_STRNCPY
+	sub	$8, %r11
+	jl	LABEL(tail)
+#endif
+
+        mov     %rcx, %r8
+        add     %rax, %r8
+        sbb     %r10, %r10
+
+        xor     %rax, %r8
+        or      %rcx, %r8
+        sub     %r10, %r8
+        jnz     LABEL(tail)
+
+        mov     %rax, (%rdi, %rdx)
+        mov     8 (%rsi, %rdx), %rax
+        add     $8, %edx
+
+#ifdef USE_AS_STRNCPY
+	sub	$8, %r11
+	jl	LABEL(tail)
+#endif
+
+        mov     %rcx, %r8
+        add     %rax, %r8
+        sbb     %r10, %r10
+
+        xor     %rax, %r8
+        or      %rcx, %r8
+        sub     %r10, %r8
+        jnz     LABEL(tail)
+
+        mov     %rax, (%rdi, %rdx)
+        mov     8 (%rsi, %rdx), %rax
+        add     $8, %edx
+
+#ifdef USE_AS_STRNCPY
+	sub	$8, %r11
+	jl	LABEL(tail)
+#endif
+
+        mov     %rcx, %r8
+        add     %rax, %r8
+        sbb     %r10, %r10
+
+        xor     %rax, %r8
+        or      %rcx, %r8
+        sub     %r10, %r8
+        jnz     LABEL(tail)
+
+        mov     %rax, (%rdi, %rdx)
+        mov     8 (%rsi, %rdx), %rax
+        add     $8, %edx
+
+#ifdef USE_AS_STRNCPY
+	sub	$8, %r11
+	jl	LABEL(tail)
+#endif
+
+        mov     %rcx, %r8
+        add     %rax, %r8
+        sbb     %r10, %r10
+
+        xor     %rax, %r8
+        or      %rcx, %r8
+        sub     %r10, %r8
+        jnz     LABEL(tail)
+
+        mov     %rax, (%rdi, %rdx)
+        mov     8 (%rsi, %rdx), %rax
+        add     $8, %edx
+
+LABEL(8after):
+
+LABEL(64try):
+#ifdef PIC
+        mov     _rtld_local_ro@GOTPCREL(%rip), %r8
+	mov	RTLD_GLOBAL_DL_CACHE1SIZEHALF(%r8), %r9
+#else
+        mov     _dl_cache1sizehalf, %r9
+#endif
+
+
+LABEL(64):				# 64-byte
+
+        .p2align 4
+
+LABEL(64loop):
+#ifdef USE_AS_STRNCPY
+	sub	$8, %r11
+	jl	LABEL(tail)
+#endif
+
+        mov     %rcx, %r8
+        add     %rax, %r8
+        sbb     %r10, %r10
+
+        xor     %rax, %r8
+        or      %rcx, %r8
+        sub     %r10, %r8
+        jnz     LABEL(tail)
+
+        mov     %rax, (%rdi, %rdx)
+        mov     8 (%rsi, %rdx), %rax
+        add     $8, %edx
+
+#ifdef USE_AS_STRNCPY
+	sub	$8, %r11
+	jl	LABEL(tail)
+#endif
+
+        mov     %rcx, %r8
+        add     %rax, %r8
+        sbb     %r10, %r10
+
+        xor     %rax, %r8
+        or      %rcx, %r8
+        sub     %r10, %r8
+        jnz     LABEL(tail)
+
+        mov     %rax, (%rdi, %rdx)
+        mov     8 (%rsi, %rdx), %rax
+        add     $8, %edx
+
+#ifdef USE_AS_STRNCPY
+	sub	$8, %r11
+	jl	LABEL(tail)
+#endif
+
+        mov     %rcx, %r8
+        add     %rax, %r8
+        sbb     %r10, %r10
+
+        xor     %rax, %r8
+        or      %rcx, %r8
+        sub     %r10, %r8
+        jnz     LABEL(tail)
+
+        mov     %rax, (%rdi, %rdx)
+        mov     8 (%rsi, %rdx), %rax
+        add     $8, %edx
+
+#ifdef USE_AS_STRNCPY
+	sub	$8, %r11
+	jl	LABEL(tail)
+#endif
+
+        mov     %rcx, %r8
+        add     %rax, %r8
+        sbb     %r10, %r10
+
+        xor     %rax, %r8
+        or      %rcx, %r8
+        sub     %r10, %r8
+        jnz     LABEL(tail)
+
+        mov     %rax, (%rdi, %rdx)
+        mov     8 (%rsi, %rdx), %rax
+        add     $8, %edx
+
+#ifdef USE_AS_STRNCPY
+	sub	$8, %r11
+	jl	LABEL(tail)
+#endif
+
+        mov     %rcx, %r8
+        add     %rax, %r8
+        sbb     %r10, %r10
+
+        xor     %rax, %r8
+        or      %rcx, %r8
+        sub     %r10, %r8
+        jnz     LABEL(tail)
+
+        mov     %rax, (%rdi, %rdx)
+        mov     8 (%rsi, %rdx), %rax
+        add     $8, %edx
+
+#ifdef USE_AS_STRNCPY
+	sub	$8, %r11
+	jl	LABEL(tail)
+#endif
+
+        mov     %rcx, %r8
+        add     %rax, %r8
+        sbb     %r10, %r10
+
+        xor     %rax, %r8
+        or      %rcx, %r8
+        sub     %r10, %r8
+        jnz     LABEL(tail)
+
+        mov     %rax, (%rdi, %rdx)
+        mov     8 (%rsi, %rdx), %rax
+        add     $8, %edx
+
+#ifdef USE_AS_STRNCPY
+	sub	$8, %r11
+	jl	LABEL(tail)
+#endif
+
+        mov     %rcx, %r8
+        add     %rax, %r8
+        sbb     %r10, %r10
+
+        xor     %rax, %r8
+        or      %rcx, %r8
+        sub     %r10, %r8
+        jnz     LABEL(tail)
+
+        mov     %rax, (%rdi, %rdx)
+        mov     8 (%rsi, %rdx), %rax
+        add     $8, %edx
+
+#ifdef USE_AS_STRNCPY
+	sub	$8, %r11
+	jl	LABEL(tail)
+#endif
+
+        mov     %rcx, %r8
+        add     %rax, %r8
+        sbb     %r10, %r10
+
+        xor     %rax, %r8
+        or      %rcx, %r8
+        sub     %r10, %r8
+        jnz     LABEL(tail)
+
+        cmp     %r9, %rdx
+
+        mov     %rax, (%rdi, %rdx)
+        mov     8 (%rsi, %rdx), %rax
+        lea     8 (%rdx), %rdx
+
+        jbe     LABEL(64loop)
+
+LABEL(64after):
+
+LABEL(pretry):
+#ifdef PIC
+	mov     _rtld_local_ro@GOTPCREL(%rip), %r8
+	mov	RTLD_GLOBAL_DL_CACHE2SIZEHALF(%r8), %r9
+#else
+        mov     _dl_cache2sizehalf, %r9
+#endif
+
+LABEL(pre):                              # 64-byte prefetch
+
+        .p2align 4
+
+LABEL(preloop):
+#ifdef USE_AS_STRNCPY
+	sub	$8, %r11
+	jl	LABEL(tail)
+#endif
+
+        mov     %rcx, %r8
+        add     %rax, %r8
+        sbb     %r10, %r10
+
+        xor     %rax, %r8
+        or      %rcx, %r8
+        sub     %r10, %r8
+        jnz     LABEL(tail)
+
+        mov     %rax, (%rdi, %rdx)
+        mov     8 (%rsi, %rdx), %rax
+        add     $8, %edx
+
+#ifdef USE_AS_STRNCPY
+	sub	$8, %r11
+	jl	LABEL(tail)
+#endif
+
+        mov     %rcx, %r8
+        add     %rax, %r8
+        sbb     %r10, %r10
+
+        xor     %rax, %r8
+        or      %rcx, %r8
+        sub     %r10, %r8
+        jnz     LABEL(tail)
+
+        mov     %rax, (%rdi, %rdx)
+        mov     8 (%rsi, %rdx), %rax
+        add     $8, %edx
+
+#ifdef USE_AS_STRNCPY
+	sub	$8, %r11
+	jl	LABEL(tail)
+#endif
+
+        mov     %rcx, %r8
+        add     %rax, %r8
+        sbb     %r10, %r10
+
+        xor     %rax, %r8
+        or      %rcx, %r8
+        sub     %r10, %r8
+        jnz     LABEL(tail)
+
+        mov     %rax, (%rdi, %rdx)
+        mov     8 (%rsi, %rdx), %rax
+        add     $8, %edx
+
+#ifdef USE_AS_STRNCPY
+	sub	$8, %r11
+	jl	LABEL(tail)
+#endif
+
+        mov     %rcx, %r8
+        add     %rax, %r8
+        sbb     %r10, %r10
+
+        xor     %rax, %r8
+        or      %rcx, %r8
+        sub     %r10, %r8
+        jnz     LABEL(tail)
+
+        mov     %rax, (%rdi, %rdx)
+        mov     8 (%rsi, %rdx), %rax
+        add     $8, %edx
+
+#ifdef USE_AS_STRNCPY
+	sub	$8, %r11
+	jl	LABEL(tail)
+#endif
+
+        mov     %rcx, %r8
+        add     %rax, %r8
+        sbb     %r10, %r10
+
+        xor     %rax, %r8
+        or      %rcx, %r8
+        sub     %r10, %r8
+        jnz     LABEL(tail)
+
+        mov     %rax, (%rdi, %rdx)
+        mov     8 (%rsi, %rdx), %rax
+        add     $8, %edx
+
+#ifdef USE_AS_STRNCPY
+	sub	$8, %r11
+	jl	LABEL(tail)
+#endif
+
+        mov     %rcx, %r8
+        add     %rax, %r8
+        sbb     %r10, %r10
+
+        xor     %rax, %r8
+        or      %rcx, %r8
+        sub     %r10, %r8
+        jnz     LABEL(tail)
+
+        mov     %rax, (%rdi, %rdx)
+        mov     8 (%rsi, %rdx), %rax
+        add     $8, %edx
+
+#ifdef USE_AS_STRNCPY
+	sub	$8, %r11
+	jl	LABEL(tail)
+#endif
+
+        mov     %rcx, %r8
+        add     %rax, %r8
+        sbb     %r10, %r10
+
+        xor     %rax, %r8
+        or      %rcx, %r8
+        sub     %r10, %r8
+        jnz     LABEL(tail)
+
+        mov     %rax, (%rdi, %rdx)
+        mov     8 (%rsi, %rdx), %rax
+        add     $8, %edx
+
+#ifdef USE_AS_STRNCPY
+	sub	$8, %r11
+	jl	LABEL(tail)
+#endif
+
+        mov     %rcx, %r8
+        add     %rax, %r8
+        sbb     %r10, %r10
+
+        xor     %rax, %r8
+        or      %rcx, %r8
+        sub     %r10, %r8
+        jnz     LABEL(tail)
+
+        cmp     %r9, %rdx
+
+        mov     %rax, (%rdi, %rdx)
+        prefetcht0 512 + 8 (%rdi, %rdx)
+        mov     8 (%rsi, %rdx), %rax
+        prefetcht0 512 + 8 (%rsi, %rdx)
+        lea     8 (%rdx), %rdx
+
+        jb	LABEL(preloop)
+
+        .p2align 4
+
+LABEL(preafter):
+
+LABEL(NTtry):
+	sfence
+
+LABEL(NT):				# 64-byte NT
+
+        .p2align 4
+
+LABEL(NTloop):
+#ifdef USE_AS_STRNCPY
+	sub	$8, %r11
+	jl	LABEL(tail)
+#endif
+
+        mov     %rcx, %r8
+        add     %rax, %r8
+        sbb     %r10, %r10
+
+        xor     %rax, %r8
+        or      %rcx, %r8
+        sub     %r10, %r8
+        jnz     LABEL(NTtail)
+
+        movnti  %rax, (%rdi, %rdx)
+        mov     8 (%rsi, %rdx), %rax
+        add     $8, %rdx
+
+#ifdef USE_AS_STRNCPY
+	sub	$8, %r11
+	jl	LABEL(tail)
+#endif
+
+        mov     %rcx, %r8
+        add     %rax, %r8
+        sbb     %r10, %r10
+
+        xor     %rax, %r8
+        or      %rcx, %r8
+        sub     %r10, %r8
+        jnz     LABEL(NTtail)
+
+        movnti  %rax, (%rdi, %rdx)
+        mov     8 (%rsi, %rdx), %rax
+        add     $8, %rdx
+
+#ifdef USE_AS_STRNCPY
+	sub	$8, %r11
+	jl	LABEL(tail)
+#endif
+
+        mov     %rcx, %r8
+        add     %rax, %r8
+        sbb     %r10, %r10
+
+        xor     %rax, %r8
+        or      %rcx, %r8
+        sub     %r10, %r8
+        jnz     LABEL(NTtail)
+
+        movnti  %rax, (%rdi, %rdx)
+        mov     8 (%rsi, %rdx), %rax
+        add     $8, %rdx
+
+#ifdef USE_AS_STRNCPY
+	sub	$8, %r11
+	jl	LABEL(tail)
+#endif
+
+        mov     %rcx, %r8
+        add     %rax, %r8
+        sbb     %r10, %r10
+
+        xor     %rax, %r8
+        or      %rcx, %r8
+        sub     %r10, %r8
+        jnz     LABEL(NTtail)
+
+        movnti  %rax, (%rdi, %rdx)
+        mov     8 (%rsi, %rdx), %rax
+        add     $8, %rdx
+
+#ifdef USE_AS_STRNCPY
+	sub	$8, %r11
+	jl	LABEL(tail)
+#endif
+
+        mov     %rcx, %r8
+        add     %rax, %r8
+        sbb     %r10, %r10
+
+        xor     %rax, %r8
+        or      %rcx, %r8
+        sub     %r10, %r8
+        jnz     LABEL(NTtail)
+
+        movnti  %rax, (%rdi, %rdx)
+        mov     8 (%rsi, %rdx), %rax
+        add     $8, %rdx
+
+#ifdef USE_AS_STRNCPY
+	sub	$8, %r11
+	jl	LABEL(tail)
+#endif
+
+        mov     %rcx, %r8
+        add     %rax, %r8
+        sbb     %r10, %r10
+
+        xor     %rax, %r8
+        or      %rcx, %r8
+        sub     %r10, %r8
+        jnz     LABEL(NTtail)
+
+        movnti  %rax, (%rdi, %rdx)
+        mov     8 (%rsi, %rdx), %rax
+        add     $8, %rdx
+
+#ifdef USE_AS_STRNCPY
+	sub	$8, %r11
+	jl	LABEL(tail)
+#endif
+
+        mov     %rcx, %r8
+        add     %rax, %r8
+        sbb     %r10, %r10
+
+        xor     %rax, %r8
+        or      %rcx, %r8
+        sub     %r10, %r8
+        jnz     LABEL(NTtail)
+
+        movnti  %rax, (%rdi, %rdx)
+        mov     8 (%rsi, %rdx), %rax
+        add     $8, %rdx
+
+#ifdef USE_AS_STRNCPY
+	sub	$8, %r11
+	jl	LABEL(tail)
+#endif
+
+        mov     %rcx, %r8
+        add     %rax, %r8
+        sbb     %r10, %r10
+
+        xor     %rax, %r8
+        or      %rcx, %r8
+        sub     %r10, %r8
+        jnz     LABEL(NTtail)
+
+        movnti  %rax, (%rdi, %rdx)
+	mov     8 (%rsi, %rdx), %rax
+	prefetchnta 768 + 8 (%rsi, %rdx)
+        add     $8, %rdx
+
+        jmp     LABEL(NTloop)
+
+        .p2align 4
+
+LABEL(NTtail):
+	sfence
+
+        .p2align 4
+
+LABEL(NTafter):
+
+LABEL(tailtry):
+
+LABEL(tail):                             # 1-byte tail
+#ifdef USE_AS_STRNCPY
+	add	$8, %r11
+#endif
+
+        .p2align 4
+
+LABEL(tailloop):
+#ifdef USE_AS_STRNCPY
+	dec	%r11
+	jl	LABEL(exitn)
+#endif
+
+        test    %al, %al
+        mov     %al, (%rdi, %rdx)
+        jz      LABEL(exit)
+
+	inc     %rdx
+
+#ifdef USE_AS_STRNCPY
+	dec	%r11
+	jl	LABEL(exitn)
+
+	mov	%ah, %al
+#endif
+
+        test    %ah, %ah
+        mov     %ah, (%rdi, %rdx)
+        jz      LABEL(exit)
+
+        inc     %rdx
+
+#ifdef USE_AS_STRNCPY
+	dec	%r11
+	jl	LABEL(exitn)
+#endif
+
+        shr     $16, %rax
+
+        test    %al, %al
+        mov     %al, (%rdi, %rdx)
+        jz      LABEL(exit)
+
+        inc     %rdx
+
+#ifdef USE_AS_STRNCPY
+	dec	%r11
+	jl	LABEL(exitn)
+
+	mov	%ah, %al
+#endif
+
+        test    %ah, %ah
+        mov     %ah, (%rdi, %rdx)
+        jz      LABEL(exit)
+
+        shr     $16, %rax
+        inc     %rdx
+
+        jmp     LABEL(tailloop)
+
+        .p2align 4
+
+LABEL(tailafter):
+
+LABEL(exit):
+#ifdef USE_AS_STRNCPY
+	test	%r11, %r11
+	mov	%r11, %rcx
+
+#ifdef USE_AS_STPCPY
+        lea     (%rdi, %rdx), %r8
+#else
+        mov     %rdi, %r8
+#endif
+
+	jz	2f
+
+	xor	%eax, %eax		# bzero () would do too, but usually there are only a handfull of bytes left
+	shr	$3, %rcx
+        lea     1 (%rdi, %rdx), %rdi
+	jz	1f
+
+	rep	stosq
+
+1:
+	mov	%r11d, %ecx
+	and	$7, %ecx
+	jz	2f
+
+        .p2align 4,, 3
+
 3:
-	/* Note that stpcpy needs to return with the value of the NUL
-	   byte.  */
-	movb	%al, (%rdx)	/* 1st byte.  */
-	testb	%al, %al	/* Is it NUL.  */
-	jz	4f		/* yes, finish.  */
-	incq	%rdx		/* Increment destination.  */
-	movb	%ah, (%rdx)	/* 2nd byte.  */
-	testb	%ah, %ah	/* Is it NUL?.  */
-	jz	4f		/* yes, finish.  */
-	incq	%rdx		/* Increment destination.  */
-	shrq	$16, %rax	/* Shift...  */
-	jmp	3b		/* and look at next two bytes in %rax.  */
+	dec	%ecx
+	mov	%al, (%rdi, %rcx)
+	jnz	3b
+
+        .p2align 4,, 3
+
+2:
+	mov	%r8, %rax
+        ret
+	
+#endif
+
+        .p2align 4
 
-4:
+LABEL(exitn):
 #ifdef USE_AS_STPCPY
-	movq	%rdx, %rax	/* Destination is return value.  */
+        lea     (%rdi, %rdx), %rax
 #else
-	movq	%rdi, %rax	/* Source is return value.  */
+        mov     %rdi, %rax
 #endif
-	retq
-END (BP_SYM (STRCPY))
-#ifndef USE_AS_STPCPY
-libc_hidden_builtin_def (strcpy)
+
+        ret
+
+END (STRCPY)
+#if !defined USE_AS_STPCPY && !defined USE_AS_STRNCPY
+libc_hidden_builtin_def (STRCPY)
 #endif
Index: sysdeps/unix/sysv/linux/x86_64/dl-procinfo.c
===================================================================
--- sysdeps/unix/sysv/linux/x86_64/dl-procinfo.c.orig
+++ sysdeps/unix/sysv/linux/x86_64/dl-procinfo.c
@@ -1,5 +1,5 @@
 #ifdef IS_IN_ldconfig
 # include <sysdeps/i386/dl-procinfo.c>
 #else
-# include <sysdeps/generic/dl-procinfo.c>
+# include <sysdeps/x86_64/dl-procinfo.c>
 #endif
Index: sysdeps/x86_64/dl-procinfo.c
===================================================================
--- /dev/null
+++ sysdeps/x86_64/dl-procinfo.c
@@ -0,0 +1,108 @@
+/* Data for x86-64 version of processor capability information.
+   Copyright (C) 2004 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+   Contributed by Andreas Jaeger <aj@suse.de>, 2004.
+
+   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, write to the Free
+   Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
+   02111-1307 USA.  */
+
+/* This information must be kept in sync with the _DL_HWCAP_COUNT and
+   _DL_PLATFORM_COUNT definitions in procinfo.h.
+
+   If anything should be added here check whether the size of each string
+   is still ok with the given array size.
+
+   All the #ifdefs in the definitions ar equite irritating but
+   necessary if we want to avoid duplicating the information.  There
+   are three different modes:
+
+   - PROCINFO_DECL is defined.  This means we are only interested in
+     declarations.
+
+   - PROCINFO_DECL is not defined:
+
+     + if SHARED is defined the file is included in an array
+       initializer.  The .element = { ... } syntax is needed.
+
+     + if SHARED is not defined a normal array initialization is
+       needed.
+  */
+
+#ifndef PROCINFO_CLASS
+#define PROCINFO_CLASS
+#endif
+
+  /* _dl_cache1size: size of L1 cache  */
+#if !defined PROCINFO_DECL && defined SHARED
+  ._dl_cache1size
+#else
+PROCINFO_CLASS long int _dl_cache1size
+#endif
+#ifndef PROCINFO_DECL
+= 1024 * 64
+#endif
+#if !defined SHARED || defined PROCINFO_DECL
+;
+#else
+,
+#endif
+
+  /* _dl_cache1sizehalf: 1/2 size of L1 cache  */
+#if !defined PROCINFO_DECL && defined SHARED
+  ._dl_cache1sizehalf
+#else
+PROCINFO_CLASS long int _dl_cache1sizehalf
+#endif
+#ifndef PROCINFO_DECL
+= 1024 * 64 / 2
+#endif
+#if !defined SHARED || defined PROCINFO_DECL
+;
+#else
+,
+#endif
+
+  /* _dl_cache2size: size of L2 cache  */
+#if !defined PROCINFO_DECL && defined SHARED
+  ._dl_cache2size
+#else
+PROCINFO_CLASS long int _dl_cache2size
+#endif
+#ifndef PROCINFO_DECL
+= 1024 * 1024
+#endif
+#if !defined SHARED || defined PROCINFO_DECL
+;
+#else
+,
+#endif
+
+  /* _dl_cache2size: 1/2 size of L2 cache  */
+#if !defined PROCINFO_DECL && defined SHARED
+  ._dl_cache2sizehalf
+#else
+PROCINFO_CLASS long int _dl_cache2sizehalf
+#endif
+#ifndef PROCINFO_DECL
+= 1024 * 1024 / 2
+#endif
+#if !defined SHARED || defined PROCINFO_DECL
+;
+#else
+,
+#endif
+
+#undef PROCINFO_DECL
+#undef PROCINFO_CLASS
Index: sysdeps/x86_64/elf/rtld-global-offsets.sym
===================================================================
--- /dev/null
+++ sysdeps/x86_64/elf/rtld-global-offsets.sym
@@ -0,0 +1,10 @@
+#define SHARED 1
+
+#include <ldsodefs.h>
+
+#define rtdl_global_offsetof(mem) offsetof (struct rtld_global_ro, mem)
+
+RTLD_GLOBAL_DL_CACHE1SIZE	rtdl_global_offsetof (_dl_cache1size)
+RTLD_GLOBAL_DL_CACHE1SIZEHALF	rtdl_global_offsetof (_dl_cache1sizehalf)
+RTLD_GLOBAL_DL_CACHE2SIZE	rtdl_global_offsetof (_dl_cache2size)
+RTLD_GLOBAL_DL_CACHE2SIZEHALF	rtdl_global_offsetof (_dl_cache2sizehalf)
Index: sysdeps/x86_64/memcmp.S
===================================================================
--- sysdeps/x86_64/memcmp.S.orig
+++ sysdeps/x86_64/memcmp.S
@@ -1,358 +1,442 @@
-/* memcmp with SSE2
-   Copyright (C) 2009 Free Software Foundation, Inc.
-   Contributed by Intel Corporation.
-   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, write to the Free
-   Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
-   02111-1307 USA.  */
-
-#include <sysdep.h>
-
-	.text
-ENTRY (memcmp)
-	test	%rdx, %rdx
-	jz	L(finz)
-	cmpq	$1, %rdx
-	jle	L(finr1b)
-	subq	%rdi, %rsi
-	movq	%rdx, %r10
-	cmpq	$32, %r10
-	jge	L(gt32)
-	/* Handle small chunks and last block of less than 32 bytes.  */
-L(small):
-	testq	$1, %r10
-	jz	L(s2b)
-	movzbl	(%rdi),	%eax
-	movzbl	(%rdi, %rsi), %edx
-	subq    $1, %r10
-	je	L(finz1)
-	addq	$1, %rdi
-	subl	%edx, %eax
-	jnz	L(exit)
-L(s2b):
-	testq	$2, %r10
-	jz	L(s4b)
-	movzwl	(%rdi),	%eax
-	movzwl	(%rdi, %rsi), %edx
-	subq    $2, %r10
-	je	L(fin2_7)
-	addq	$2, %rdi
-	cmpl	%edx, %eax
-	jnz	L(fin2_7)
-L(s4b):
-	testq	$4, %r10
-	jz	L(s8b)
-	movl	(%rdi),	%eax
-	movl	(%rdi, %rsi), %edx
-	subq    $4, %r10
-	je	L(fin2_7)
-	addq	$4, %rdi
-	cmpl	%edx, %eax
-	jnz	L(fin2_7)
-L(s8b):
-	testq	$8, %r10
-	jz	L(s16b)
-	movq	(%rdi),	%rax
-	movq	(%rdi, %rsi), %rdx
-	subq    $8, %r10
-	je	L(fin2_7)
-	addq	$8, %rdi
-	cmpq	%rdx, %rax
-	jnz	L(fin2_7)
-L(s16b):
-	movdqu    (%rdi), %xmm1
-	movdqu    (%rdi, %rsi), %xmm0
-	pcmpeqb   %xmm0, %xmm1
-	pmovmskb  %xmm1, %edx
-	xorl	  %eax, %eax
-	subl      $0xffff, %edx
-	jz	  L(finz)
-	bsfl      %edx, %ecx
-	leaq	 (%rdi, %rcx), %rcx
-	movzbl	 (%rcx), %eax
-	movzbl	 (%rsi, %rcx), %edx
-	jmp	 L(finz1)
-
-	.p2align 4,, 4
-L(finr1b):
-	movzbl	(%rdi), %eax
-	movzbl  (%rsi), %edx
-L(finz1):
-	subl	%edx, %eax
-L(exit):
-	ret
-
-	.p2align 4,, 4
-L(fin2_7):
-	cmpq	%rdx, %rax
-	jz	L(finz)
-	movq	%rax, %r11
-	subq	%rdx, %r11
-	bsfq	%r11, %rcx
-	sarq	$3, %rcx
-	salq	$3, %rcx
-	sarq	%cl, %rax
-	movzbl  %al, %eax
-	sarq	%cl, %rdx
-	movzbl  %dl, %edx
-	subl	%edx, %eax
-	ret
-
-	.p2align 4,, 4
-L(finz):
-	xorl	%eax, %eax
-	ret
-
-	/* For blocks bigger than 32 bytes
-	   1. Advance one of the addr pointer to be 16B aligned.
-	   2. Treat the case of both addr pointers aligned to 16B
-	      separately to avoid movdqu.
-	   3. Handle any blocks of greater than 64 consecutive bytes with
-	      unrolling to reduce branches.
-	   4. At least one addr pointer is 16B aligned, use memory version
-	      of pcmbeqb.
-	*/
-	.p2align 4,, 4
-L(gt32):
-	movq	%rdx, %r11
-	addq	%rdi, %r11
-	movq	%rdi, %r8
-
-	andq	$15, %r8
-	jz	L(16am)
-	/* Both pointers may be misaligned.  */
-	movdqu	(%rdi),	%xmm1
-	movdqu	(%rdi, %rsi), %xmm0
-	pcmpeqb   %xmm0, %xmm1
-	pmovmskb  %xmm1, %edx
-	subl      $0xffff, %edx
-	jnz       L(neq)
-	neg	 %r8
-	leaq    16(%rdi, %r8), %rdi
-L(16am):
-	/* Handle two 16B aligned pointers separately.  */
-	testq   $15, %rsi
-	jz      L(ATR)
-	testq	$16, %rdi
-	jz	L(A32)
-	movdqu	(%rdi, %rsi), %xmm0
-	pcmpeqb   (%rdi), %xmm0
-	pmovmskb  %xmm0, %edx
-	subl      $0xffff, %edx
-	jnz       L(neq)
-	addq	$16, %rdi
-L(A32):
-	movq	%r11, %r10
-	andq	$-32, %r10
-	cmpq	%r10, %rdi
-        jge	L(mt16)
-	/* Pre-unroll to be ready for unrolled 64B loop.  */
-	testq	$32, %rdi
-	jz	L(A64)
-	movdqu    (%rdi,%rsi), %xmm0
-	pcmpeqb   (%rdi), %xmm0
-	pmovmskb  %xmm0, %edx
-	subl      $0xffff, %edx
-	jnz       L(neq)
-	addq       $16, %rdi
-
-	movdqu    (%rdi,%rsi), %xmm0
-	pcmpeqb  (%rdi), %xmm0
-	pmovmskb  %xmm0, %edx
-	subl      $0xffff, %edx
-	jnz       L(neq)
-	addq       $16, %rdi
-
-L(A64):
-	movq	%r11, %r10
-	andq	$-64, %r10
-	cmpq	%r10, %rdi
-        jge	L(mt32)
-
-L(A64main):
-	movdqu    (%rdi,%rsi), %xmm0
-	pcmpeqb   (%rdi), %xmm0
-	pmovmskb  %xmm0, %edx
-	subl      $0xffff, %edx
-	jnz       L(neq)
-	addq       $16, %rdi
-
-	movdqu    (%rdi,%rsi), %xmm0
-	pcmpeqb   (%rdi), %xmm0
-	pmovmskb  %xmm0, %edx
-	subl      $0xffff, %edx
-	jnz       L(neq)
-	addq       $16, %rdi
-
-	movdqu    (%rdi,%rsi), %xmm0
-	pcmpeqb   (%rdi), %xmm0
-	pmovmskb  %xmm0, %edx
-	subl      $0xffff, %edx
-	jnz       L(neq)
-	addq       $16, %rdi
-
-	movdqu    (%rdi,%rsi), %xmm0
-	pcmpeqb  (%rdi), %xmm0
-	pmovmskb  %xmm0, %edx
-	subl      $0xffff, %edx
-	jnz       L(neq)
-	addq       $16, %rdi
-
-	cmpq       %rdi, %r10
-	jne       L(A64main)
-
-L(mt32):
-	movq	%r11, %r10
-	andq	$-32, %r10
-	cmpq	%r10, %rdi
-        jge	L(mt16)
-
-L(A32main):
-	movdqu    (%rdi,%rsi), %xmm0
-	pcmpeqb   (%rdi), %xmm0
-	pmovmskb  %xmm0, %edx
-	subl      $0xffff, %edx
-	jnz       L(neq)
-	addq       $16, %rdi
-
-	movdqu    (%rdi,%rsi), %xmm0
-	pcmpeqb  (%rdi), %xmm0
-	pmovmskb  %xmm0, %edx
-	subl      $0xffff, %edx
-	jnz       L(neq)
-	addq       $16, %rdi
-
-	cmpq       %rdi, %r10
-	jne       L(A32main)
-L(mt16):
-	subq       %rdi, %r11
-	je	  L(finz)
-	movq	  %r11, %r10
-	jmp	  L(small)
-
-	.p2align 4,, 4
-L(neq):
-	bsfl      %edx, %ecx
-	movzbl	 (%rdi, %rcx), %eax
-	addq	 %rdi, %rsi
-	movzbl	 (%rsi,%rcx), %edx
-	jmp	 L(finz1)
-
-	.p2align 4,, 4
-L(ATR):
-	movq	%r11, %r10
-	andq	$-32, %r10
-	cmpq	%r10, %rdi
-        jge	L(mt16)
-	testq	$16, %rdi
-	jz	L(ATR32)
-
-	movdqa    (%rdi,%rsi), %xmm0
-	pcmpeqb   (%rdi), %xmm0
-	pmovmskb  %xmm0, %edx
-	subl      $0xffff, %edx
-	jnz       L(neq)
-	addq       $16, %rdi
-	cmpq       %rdi, %r10
-	je       L(mt16)
-
-L(ATR32):
-	movq	%r11, %r10
-	andq	$-64, %r10
-	testq	$32, %rdi
-	jz	L(ATR64)
-
-	movdqa    (%rdi,%rsi), %xmm0
-	pcmpeqb   (%rdi), %xmm0
-	pmovmskb  %xmm0, %edx
-	subl      $0xffff, %edx
-	jnz       L(neq)
-	addq       $16, %rdi
-
-	movdqa    (%rdi,%rsi), %xmm0
-	pcmpeqb   (%rdi), %xmm0
-	pmovmskb  %xmm0, %edx
-	subl      $0xffff, %edx
-	jnz       L(neq)
-	addq       $16, %rdi
-
-L(ATR64):
-	cmpq       %rdi, %r10
-	je	   L(mt32)
-
-L(ATR64main):
-	movdqa    (%rdi,%rsi), %xmm0
-	pcmpeqb   (%rdi), %xmm0
-	pmovmskb  %xmm0, %edx
-	subl      $0xffff, %edx
-	jnz       L(neq)
-	addq       $16, %rdi
-
-	movdqa    (%rdi,%rsi), %xmm0
-	pcmpeqb   (%rdi), %xmm0
-	pmovmskb  %xmm0, %edx
-	subl      $0xffff, %edx
-	jnz       L(neq)
-	addq       $16, %rdi
-
-	movdqa    (%rdi,%rsi), %xmm0
-	pcmpeqb   (%rdi), %xmm0
-	pmovmskb  %xmm0, %edx
-	subl      $0xffff, %edx
-	jnz       L(neq)
-	addq       $16, %rdi
-
-	movdqa    (%rdi,%rsi), %xmm0
-	pcmpeqb   (%rdi), %xmm0
-	pmovmskb  %xmm0, %edx
-	subl      $0xffff, %edx
-	jnz       L(neq)
-	addq       $16, %rdi
-	cmpq       %rdi, %r10
-	jne       L(ATR64main)
-
-	movq	%r11, %r10
-	andq	$-32, %r10
-	cmpq	%r10, %rdi
-        jge	L(mt16)
-
-L(ATR32res):
-	movdqa    (%rdi,%rsi), %xmm0
-	pcmpeqb   (%rdi), %xmm0
-	pmovmskb  %xmm0, %edx
-	subl      $0xffff, %edx
-	jnz       L(neq)
-	addq       $16, %rdi
-
-	movdqa    (%rdi,%rsi), %xmm0
-	pcmpeqb   (%rdi), %xmm0
-	pmovmskb  %xmm0, %edx
-	subl      $0xffff, %edx
-	jnz       L(neq)
-	addq       $16, %rdi
-
-	cmpq	  %r10, %rdi
-	jne       L(ATR32res)
-
-	subq       %rdi, %r11
-	je	  L(finz)
-	movq	  %r11, %r10
-	jmp	  L(small)
-	/* Align to 16byte to improve instruction fetch.  */
-	.p2align 4,, 4
-END(memcmp)
+# $Header: /K8_Projects/Glibc/amd64memcmp.S 4     10/06/03 10:57 Emenezes $
+
+# (c) 2002 Advanced Micro Devices, Inc.
+# YOUR USE OF THIS CODE IS SUBJECT TO THE TERMS
+# AND CONDITIONS OF THE GNU LESSER GENERAL PUBLIC
+# LICENSE FOUND IN THE "README" FILE THAT IS
+# INCLUDED WITH THIS FILE
+
+#include "sysdep.h"
+#include <rtld-global-offsets.h>
+
+#ifdef PIC
+	.globl _rtld_local_ro
+        .hidden _rtld_local_ro
+        .set    _rtld_local_ro,_rtld_global_ro
+#endif
+
+        .text
+
+ENTRY   (memcmp)                        # (const void *, const void*, size_t)
+
+L(memcmptry1):
+        cmp     $8, %rdx
+        jae     L(memcmp1after)
+
+L(memcmp1):                                # 1-byte
+        test    %rdx, %rdx
+        mov     $0, %eax
+        jz      L(memcmpexit)
+
+L(memcmp1loop):
+        movzbl  (%rdi), %eax
+        movzbl  (%rsi), %ecx
+        sub     %ecx, %eax
+        jnz     L(memcmpexit)
+
+        dec     %rdx
+
+        lea     1 (%rdi), %rdi
+        lea     1 (%rsi), %rsi
+
+        jnz     L(memcmp1loop)
+
+L(memcmpexit):
+        rep
+        ret
+
+        .p2align 4
+
+L(memcmp1after):
+
+L(memcmp8try):
+        cmp     $32, %rdx
+        jae     L(memcmp8after)
+
+L(memcmp8):                        # 8-byte
+        mov     %edx, %ecx
+        shr     $3, %ecx
+        jz      L(memcmp1)
+
+        .p2align 4
+
+L(memcmp8loop):
+        mov     (%rsi), %rax
+        cmp     (%rdi), %rax
+        jne     L(memcmp1)
+
+        sub     $8, %rdx
+        dec     %ecx
+
+        lea     8 (%rsi), %rsi
+        lea     8 (%rdi), %rdi
+
+        jnz     L(memcmp8loop)
+
+L(memcmp8skip):
+        and     $7, %edx
+        jnz     L(memcmp1)
+
+        xor     %eax, %eax
+        ret
+
+        .p2align 4
+
+L(memcmp8after):
+
+L(memcmp32try):
+        cmp     $2048, %rdx
+        ja      L(memcmp32after)
+
+L(memcmp32):                               # 32-byte
+        mov     %edx, %ecx
+        shr     $5, %ecx
+        jz      L(memcmp8)
+
+        .p2align 4
+
+L(memcmp32loop):
+        mov        (%rsi), %rax
+        mov      8 (%rsi),  %r8
+        mov     16 (%rsi),  %r9
+        mov     24 (%rsi), %r10
+        sub        (%rdi), %rax
+        sub      8 (%rdi),  %r8
+        sub     16 (%rdi),  %r9
+        sub     24 (%rdi), %r10
+
+        or      %rax,  %r8
+        or       %r9, %r10
+        or       %r8, %r10
+        jnz     L(memcmp8)
+
+        sub     $32, %rdx
+        dec     %ecx
+
+        lea     32 (%rsi), %rsi
+        lea     32 (%rdi), %rdi
+
+        jnz     L(memcmp32loop)
+
+L(memcmp32skip):
+        and     $31, %edx
+        jnz     L(memcmp8)
+
+        xor     %eax, %eax
+        ret
+
+        .p2align 4
+
+L(memcmp32after):
+
+#ifdef PIC
+        mov     _rtld_local_ro@GOTPCREL(%rip), %r8
+	mov	RTLD_GLOBAL_DL_CACHE1SIZEHALF(%r8), %r9
+#else
+        mov     _dl_cache1sizehalf, %r9
+#endif
+	prefetcht0 (%r9)
+
+
+.alignsrctry:
+        mov     %esi, %r8d      # align by source
+
+        and     $7, %r8d
+        jz      .alignsrcafter  # not unaligned
+
+.alignsrc:                      # align
+        lea     -8 (%r8, %rdx), %rdx
+        sub     $8, %r8d
+
+#       .p2align 4
+
+.alignsrcloop:
+        movzbl  (%rdi), %eax
+        movzbl  (%rsi), %ecx
+        sub     %ecx, %eax
+        jnz     L(memcmpexit)
+
+        inc     %r8d
+
+        lea     1 (%rdi), %rdi
+        lea     1 (%rsi), %rsi
+
+        jnz     .alignsrcloop
+
+        .p2align 4
+
+.alignsrcafter:
+
+
+L(memcmp64try):
+#ifdef PIC
+        mov     _rtld_local_ro@GOTPCREL(%rip), %r8
+	mov	RTLD_GLOBAL_DL_CACHE1SIZEHALF(%r8), %rcx
+#else
+        mov     _dl_cache1sizehalf, %rcx
+#endif
+        cmp	%rdx, %rcx
+        cmova   %rdx, %rcx
+
+L(memcmp64):                               # 64-byte
+        shr     $6, %rcx
+        jz      L(memcmp32)
+
+        .p2align 4
+
+L(memcmp64loop):
+        mov        (%rsi), %rax
+        mov      8 (%rsi),  %r8
+        sub        (%rdi), %rax
+        sub      8 (%rdi),  %r8
+        or      %r8,  %rax
+
+        mov     16 (%rsi),  %r9
+        mov     24 (%rsi), %r10
+        sub     16 (%rdi),  %r9
+        sub     24 (%rdi), %r10
+        or      %r10, %r9
+
+        or      %r9,  %rax
+        jnz     L(memcmp32)
+
+        mov     32 (%rsi), %rax
+        mov     40 (%rsi),  %r8
+        sub     32 (%rdi), %rax
+        sub     40 (%rdi),  %r8
+        or      %r8,  %rax
+
+        mov     48 (%rsi),  %r9
+        mov     56 (%rsi), %r10
+        sub     48 (%rdi),  %r9
+        sub     56 (%rdi), %r10
+        or      %r10, %r9
+
+        or      %r9,  %rax
+        jnz    	L(memcmp32)
+
+        lea     64 (%rsi), %rsi
+        lea     64 (%rdi), %rdi
+
+        sub     $64, %rdx
+        dec     %rcx
+        jnz     L(memcmp64loop)
+
+#       .p2align 4
+
+L(memcmp64skip):
+        cmp     $2048, %rdx
+        ja     L(memcmp64after)
+
+        test    %edx, %edx
+        jnz     L(memcmp32)
+
+        xor     %eax, %eax
+        ret
+
+        .p2align 4
+
+L(memcmp64after):
+
+L(memcmppretry):
+
+L(memcmppre):                              # 64-byte prefetching
+#ifdef PIC
+        mov     _rtld_local_ro@GOTPCREL(%rip), %r8
+	mov	RTLD_GLOBAL_DL_CACHE2SIZEHALF(%r8), %rcx
+#else
+        mov     _dl_cache2sizehalf, %rcx
+#endif
+        cmp	%rdx, %rcx
+        cmova   %rdx, %rcx
+
+        shr     $6, %rcx
+        jz      L(memcmppreskip)
+
+        prefetcht0 512 (%rsi)
+        prefetcht0 512 (%rdi)
+
+        mov        (%rsi), %rax
+        mov      8 (%rsi), %r9
+        mov     16 (%rsi), %r10
+        mov     24 (%rsi), %r11
+        sub        (%rdi), %rax
+        sub      8 (%rdi), %r9
+        sub     16 (%rdi), %r10
+        sub     24 (%rdi), %r11
+
+        or       %r9, %rax
+        or      %r11, %r10
+        or      %r10, %rax
+        jnz     L(memcmp32)
+
+        mov     32 (%rsi), %rax
+        mov     40 (%rsi), %r9
+        mov     48 (%rsi), %r10
+        mov     56 (%rsi), %r11
+        sub     32 (%rdi), %rax
+        sub     40 (%rdi), %r9
+        sub     48 (%rdi), %r10
+        sub     56 (%rdi), %r11
+
+        or       %r9, %rax
+        or      %r11, %r10
+        or      %r10, %rax
+        jnz     L(memcmp32)
+
+        lea     64 (%rsi), %rsi
+        lea     64 (%rdi), %rdi
+
+        sub     $64, %rdx
+        dec     %rcx
+
+        .p2align 4
+
+L(memcmppreloop):
+        prefetcht0 512 (%rsi)
+        prefetcht0 512 (%rdi)
+
+        mov        (%rsi), %rax
+        mov      8 (%rsi), %r9
+        mov     16 (%rsi), %r10
+        mov     24 (%rsi), %r11
+        sub        (%rdi), %rax
+        sub      8 (%rdi), %r9
+        sub     16 (%rdi), %r10
+        sub     24 (%rdi), %r11
+
+        or       %r9, %rax
+        or      %r11, %r10
+        or      %r10, %rax
+        jnz     L(memcmp32)
+
+        mov     32 (%rsi), %rax
+        mov     40 (%rsi), %r9
+        mov     48 (%rsi), %r10
+        mov     56 (%rsi), %r11
+        sub     32 (%rdi), %rax
+        sub     40 (%rdi), %r9
+        sub     48 (%rdi), %r10
+        sub     56 (%rdi), %r11
+
+        or       %r9, %rax
+        or      %r11, %r10
+        or      %r10, %rax
+        jnz     L(memcmp32)
+
+        lea     64 (%rsi), %rsi
+        lea     64 (%rdi), %rdi
+
+        sub     $64, %rdx
+        dec     %rcx
+        jnz     L(memcmppreloop)
+
+#       .p2align 4
+
+L(memcmppreskip):
+        cmp     $2048, %rdx
+        ja      L(memcmppreafter)
+
+        test    %edx, %edx
+        jnz     L(memcmp32)
+
+        xor     %eax, %eax
+        ret
+
+        .p2align 4
+
+L(memcmppreafter):
+
+L(memcmp128try):
+
+L(memcmp128):                              # 128-byte
+        mov     %rdx, %rcx
+        shr     $7, %rcx
+        jz      L(memcmp128skip)
+
+        .p2align 4
+
+L(memcmp128loop):
+        prefetcht0 512 (%rsi)
+        prefetcht0 512 (%rdi)
+
+        mov        (%rsi), %rax
+        mov      8 (%rsi), %r8
+        sub        (%rdi), %rax
+        sub      8 (%rdi), %r8
+        mov     16 (%rsi), %r9
+        mov     24 (%rsi), %r10
+        sub     16 (%rdi), %r9
+        sub     24 (%rdi), %r10
+
+        or       %r8, %rax
+        or       %r9, %r10
+        or      %r10, %rax
+
+        mov     32 (%rsi), %r8
+        mov     40 (%rsi), %r9
+        sub     32 (%rdi), %r8
+        sub     40 (%rdi), %r9
+        mov     48 (%rsi), %r10
+        mov     56 (%rsi), %r11
+        sub     48 (%rdi), %r10
+        sub     56 (%rdi), %r11
+
+        or       %r9, %r8
+        or      %r11, %r10
+        or      %r10, %r8
+
+        or      %r8, %rax
+        jnz     L(memcmp32)
+
+        prefetcht0 576 (%rsi)
+        prefetcht0 576 (%rdi)
+
+        mov      64 (%rsi), %rax
+        mov      72 (%rsi), %r8
+        sub      64 (%rdi), %rax
+        sub      72 (%rdi), %r8
+        mov      80 (%rsi), %r9
+        mov      88 (%rsi), %r10
+        sub      80 (%rdi), %r9
+        sub      88 (%rdi), %r10
+
+        or       %r8, %rax
+        or       %r9, %r10
+        or      %r10, %rax
+
+        mov      96 (%rsi), %r8
+        mov     104 (%rsi), %r9
+        sub      96 (%rdi), %r8
+        sub     104 (%rdi), %r9
+        mov     112 (%rsi), %r10
+        mov     120 (%rsi), %r11
+        sub     112 (%rdi), %r10
+        sub     120 (%rdi), %r11
+
+        or       %r9, %r8
+        or      %r11, %r10
+        or      %r10, %r8
+
+        or      %r8, %rax
+        jnz     L(memcmp32)
+
+        sub     $128, %rdx
+        dec     %rcx
+
+        lea     128 (%rsi), %rsi
+        lea     128 (%rdi), %rdi
+
+        jnz     L(memcmp128loop)
+
+L(memcmp128skip):
+        and     $127, %edx
+        jnz     L(memcmp32)
+
+        xor     %eax, %eax
+        ret
+
+END     (memcmp)
 
 #undef bcmp
 weak_alias (memcmp, bcmp)
Index: sysdeps/x86_64/strcmp.S
===================================================================
--- sysdeps/x86_64/strcmp.S.orig
+++ sysdeps/x86_64/strcmp.S
@@ -1,2108 +1,490 @@
-/* Highly optimized version for x86-64.
-   Copyright (C) 1999, 2000, 2002, 2003, 2005, 2009
-   Free Software Foundation, Inc.
-   This file is part of the GNU C Library.
-   Based on i686 version contributed by Ulrich Drepper
-   <drepper@cygnus.com>, 1999.
-   Updated with SSE2 support contributed by Intel Corporation.
-
-   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, write to the Free
-   Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
-   02111-1307 USA.  */
 
 #include <sysdep.h>
 #include "asm-syntax.h"
 #include "bp-sym.h"
 #include "bp-asm.h"
 
-#undef UPDATE_STRNCMP_COUNTER
-
 #ifndef LABEL
 #define LABEL(l) L(l)
 #endif
 
-#ifdef USE_AS_STRNCMP
-/* Since the counter, %r11, is unsigned, we branch to strcmp_exitz
-   if the new counter > the old one or is 0.  */
-# define UPDATE_STRNCMP_COUNTER				\
-	/* calculate left number to compare */		\
-	lea	-16(%rcx, %r11), %r9;			\
-	cmp	%r9, %r11;				\
-	jb	LABEL(strcmp_exitz);			\
-	test	%r9, %r9;				\
-	je	LABEL(strcmp_exitz);			\
-	mov	%r9, %r11
-
-#else
-# define UPDATE_STRNCMP_COUNTER
+#ifndef USE_AS_STRNCMP
 # ifndef STRCMP
 #  define STRCMP strcmp
 # endif
 #endif
-
-#ifndef USE_SSSE3
 	.text
-#else
-        .section .text.ssse3,"ax",@progbits
-#endif
 
-ENTRY (BP_SYM (STRCMP))
-#ifdef NOT_IN_libc
-/* Simple version since we can't use SSE registers in ld.so.  */
-L(oop):	movb	(%rdi), %al
-	cmpb	(%rsi), %al
-	jne	L(neq)
-	incq	%rdi
-	incq	%rsi
-	testb	%al, %al
-	jnz	L(oop)
-
-	xorl	%eax, %eax
-	ret
-
-L(neq):	movl	$1, %eax
-	movl	$-1, %ecx
-	cmovbl	%ecx, %eax
-	ret
-END (BP_SYM (STRCMP))
-#else	/* NOT_IN_libc */
-/*
- * This implementation uses SSE to compare up to 16 bytes at a time.
- */
-#ifdef USE_AS_STRNCMP
-	test	%rdx, %rdx
-	je	LABEL(strcmp_exitz)
-	cmp	$1, %rdx
-	je	LABEL(Byte0)
-	mov	%rdx, %r11
-#endif
-	mov	%esi, %ecx
-	mov	%edi, %eax
-/* Use 64bit AND here to avoid long NOP padding.  */
-	and	$0x3f, %rcx		/* rsi alignment in cache line */
-	and	$0x3f, %rax		/* rdi alignment in cache line */
-	cmp	$0x30, %ecx
-	ja	LABEL(crosscache)	/* rsi: 16-byte load will cross cache line */
-	cmp	$0x30, %eax
-	ja	LABEL(crosscache)	/* rdi: 16-byte load will cross cache line */
-	movlpd	(%rdi), %xmm1
-	movlpd	(%rsi), %xmm2
-	movhpd	8(%rdi), %xmm1
-	movhpd	8(%rsi), %xmm2
-	pxor	%xmm0, %xmm0		/* clear %xmm0 for null char checks */
-	pcmpeqb	%xmm1, %xmm0		/* Any null chars? */
-	pcmpeqb	%xmm2, %xmm1		/* compare first 16 bytes for equality */
-	psubb	%xmm0, %xmm1		/* packed sub of comparison results*/
-	pmovmskb %xmm1, %edx
-	sub	$0xffff, %edx		/* if first 16 bytes are same, edx == 0xffff */
-	jnz	LABEL(less16bytes)	/* If not, find different value or null char */
-#ifdef USE_AS_STRNCMP
-	sub	$16, %r11
-	jbe	LABEL(strcmp_exitz)	/* finish comparision */
-#endif
-	add	$16, %rsi		/* prepare to search next 16 bytes */
-	add	$16, %rdi		/* prepare to search next 16 bytes */
+ENTRY   (STRCMP)			# (const char *, const char *)
 
-	/*
-	 * Determine source and destination string offsets from 16-byte alignment.
-	 * Use relative offset difference between the two to determine which case
-	 * below to use.
-	 */
-	.p2align 4
-LABEL(crosscache):
-	and	$0xfffffffffffffff0, %rsi	/* force %rsi is 16 byte aligned */
-	and	$0xfffffffffffffff0, %rdi	/* force %rdi is 16 byte aligned */
-	mov	$0xffff, %edx			/* for equivalent offset */
-	xor	%r8d, %r8d
-	and	$0xf, %ecx			/* offset of rsi */
-	and	$0xf, %eax			/* offset of rdi */
-	cmp	%eax, %ecx
-	je	LABEL(ashr_0)			/* rsi and rdi relative offset same */
-	ja	LABEL(bigger)
-	mov	%edx, %r8d			/* r8d is offset flag for exit tail */
-	xchg	%ecx, %eax
-	xchg	%rsi, %rdi
-LABEL(bigger):
-	lea	15(%rax), %r9
-	sub	%rcx, %r9
-	lea	LABEL(unaligned_table)(%rip), %r10
-	movslq	(%r10, %r9,4), %r9
-	lea	(%r10, %r9), %r10
-	jmp	*%r10				/* jump to corresponding case */
-
-/*
- * The following cases will be handled by ashr_0
- *  rcx(offset of rsi)  rax(offset of rdi)  relative offset  corresponding case
- *        n(0~15)            n(0~15)           15(15+ n-n)         ashr_0
- */
-	.p2align 4
-LABEL(ashr_0):
-
-	movdqa	(%rsi), %xmm1
-	pxor	%xmm0, %xmm0			/* clear %xmm0 for null char check */
-	pcmpeqb	%xmm1, %xmm0			/* Any null chars? */
-	pcmpeqb	(%rdi), %xmm1			/* compare 16 bytes for equality */
-	psubb	%xmm0, %xmm1			/* packed sub of comparison results*/
-	pmovmskb %xmm1, %r9d
-	shr	%cl, %edx			/* adjust 0xffff for offset */
-	shr	%cl, %r9d			/* adjust for 16-byte offset */
-	sub	%r9d, %edx
-	/*
-	 * edx must be the same with r9d if in left byte (16-rcx) is equal to
-	 * the start from (16-rax) and no null char was seen.
-	 */
-	jne	LABEL(less32bytes)		/* mismatch or null char */
-	UPDATE_STRNCMP_COUNTER
-	mov	$16, %rcx
-	mov	$16, %r9
-	pxor	%xmm0, %xmm0			/* clear xmm0, may have changed above */
-
-	/*
-	 * Now both strings are aligned at 16-byte boundary. Loop over strings
-	 * checking 32-bytes per iteration.
-	 */
-	.p2align 4
-LABEL(loop_ashr_0):
-	movdqa	(%rsi, %rcx), %xmm1
-	movdqa	(%rdi, %rcx), %xmm2
-
-	pcmpeqb	%xmm1, %xmm0
-	pcmpeqb	%xmm2, %xmm1
-	psubb	%xmm0, %xmm1
-	pmovmskb %xmm1, %edx
-	sub	$0xffff, %edx
-	jnz	LABEL(exit)		/* mismatch or null char seen */
+        xor     %ecx, %ecx
 
-#ifdef USE_AS_STRNCMP
-	sub	$16, %r11
-	jbe	LABEL(strcmp_exitz)
-#endif
-	add	$16, %rcx
-	movdqa	(%rsi, %rcx), %xmm1
-	movdqa	(%rdi, %rcx), %xmm2
-
-	pcmpeqb	%xmm1, %xmm0
-	pcmpeqb	%xmm2, %xmm1
-	psubb	%xmm0, %xmm1
-	pmovmskb %xmm1, %edx
-	sub	$0xffff, %edx
-	jnz	LABEL(exit)
-#ifdef USE_AS_STRNCMP
-	sub	$16, %r11
-	jbe	LABEL(strcmp_exitz)
-#endif
-	add	$16, %rcx
-	jmp	LABEL(loop_ashr_0)
+#ifdef USE_AS_STRNCMP			// (const char *, const char *, size_t)
+        mov	%r14, -8 (%rsp)
+	mov	%rdx, %r14
 
-/*
- * The following cases will be handled by ashr_1
- * rcx(offset of rsi)  rax(offset of rdi)   relative offset   	corresponding case
- *        n(15)            n -15            0(15 +(n-15) - n)         ashr_1
- */
-	.p2align 4
-LABEL(ashr_1):
-	pxor	%xmm0, %xmm0
-	movdqa	(%rdi), %xmm2
-	movdqa	(%rsi), %xmm1
-	pcmpeqb	%xmm1, %xmm0		/* Any null chars? */
-	pslldq	$15, %xmm2		/* shift first string to align with second */
-	pcmpeqb	%xmm1, %xmm2		/* compare 16 bytes for equality */
-	psubb	%xmm0, %xmm2		/* packed sub of comparison results*/
-	pmovmskb %xmm2, %r9d
-	shr	%cl, %edx		/* adjust 0xffff for offset */
-	shr	%cl, %r9d		/* adjust for 16-byte offset */
-	sub	%r9d, %edx
-	jnz	LABEL(less32bytes)	/* mismatch or null char seen */
-	movdqa	(%rdi), %xmm3
-	UPDATE_STRNCMP_COUNTER
-
-	pxor	%xmm0, %xmm0
-	mov	$16, %rcx		/* index for loads*/
-	mov	$1, %r9d		/* byte position left over from less32bytes case */
-	/*
-	 * Setup %r10 value allows us to detect crossing a page boundary.
-	 * When %r10 goes positive we have crossed a page boundary and
-	 * need to do a nibble.
-	 */
-	lea	1(%rdi), %r10
-	and	$0xfff, %r10		/* offset into 4K page */
-	sub	$0x1000, %r10		/* subtract 4K pagesize */
-
-	.p2align 4
-LABEL(loop_ashr_1):
-	add	$16, %r10
-	jg	LABEL(nibble_ashr_1)	/* cross page boundary */
-
-LABEL(gobble_ashr_1):
-	movdqa	(%rsi, %rcx), %xmm1
-	movdqa	(%rdi, %rcx), %xmm2
-	movdqa	%xmm2, %xmm4		 /* store for next cycle */
-
-#ifndef USE_SSSE3
-	psrldq	$1, %xmm3
-	pslldq	$15, %xmm2
-	por	%xmm3, %xmm2		/* merge into one 16byte value */
-#else
-	palignr	$1, %xmm3, %xmm2	/* merge into one 16byte value */
-#endif
-
-	pcmpeqb	%xmm1, %xmm0
-	pcmpeqb	%xmm2, %xmm1
-	psubb	%xmm0, %xmm1
-	pmovmskb %xmm1, %edx
-	sub	$0xffff, %edx
-	jnz	LABEL(exit)
-
-#ifdef USE_AS_STRNCMP
-	sub	$16, %r11
-	jbe	LABEL(strcmp_exitz)
+	test	%rdx, %rdx
+	mov	%edx, %eax
+	jz	LABEL(exitz)
 #endif
-	add	$16, %rcx
-	movdqa	%xmm4, %xmm3
 
-	add	$16, %r10
-	jg	LABEL(nibble_ashr_1)	/* cross page boundary */
+LABEL(aligntry):
+        mov     %rsi, %r8		# align by "source"
+        and     $8 - 1, %r8		# between 0 and 8 characters compared
+	jz	LABEL(alignafter)
 
-	movdqa	(%rsi, %rcx), %xmm1
-	movdqa	(%rdi, %rcx), %xmm2
-	movdqa	%xmm2, %xmm4		/* store for next cycle */
-
-#ifndef USE_SSSE3
-	psrldq	$1, %xmm3
-	pslldq	$15, %xmm2
-	por	%xmm3, %xmm2		/* merge into one 16byte value */
-#else
-	palignr	$1, %xmm3, %xmm2	/* merge into one 16byte value */
-#endif
-
-	pcmpeqb	%xmm1, %xmm0
-	pcmpeqb	%xmm2, %xmm1
-	psubb	%xmm0, %xmm1
-	pmovmskb %xmm1, %edx
-	sub	$0xffff, %edx
-	jnz	LABEL(exit)
+LABEL(align):
+        sub     $8, %r8
 
-#ifdef USE_AS_STRNCMP
-	sub	$16, %r11
-	jbe	LABEL(strcmp_exitz)
-#endif
-	add	$16, %rcx
-	movdqa	%xmm4, %xmm3
-	jmp	LABEL(loop_ashr_1)
-
-	/*
-	 * Nibble avoids loads across page boundary. This is to avoid a potential
-	 * access into unmapped memory.
-	 */
-	.p2align 4
-LABEL(nibble_ashr_1):
-	pcmpeqb	%xmm3, %xmm0		 /* check nibble for null char*/
-	pmovmskb %xmm0, %edx
-	test	$0xfffe, %edx
-	jnz	LABEL(ashr_1_exittail)	/* find null char*/
+        .p2align 4
+
+LABEL(alignloop):
+        mov     (%rsi, %rcx), %al
+        mov	(%rdi, %rcx), %dl
 
 #ifdef USE_AS_STRNCMP
-	cmp	$14, %r11
-	jbe	LABEL(ashr_1_exittail)
+	dec	%r14
+	jl	LABEL(exitafter)
 #endif
 
-	pxor	%xmm0, %xmm0
-	sub	$0x1000, %r10		/* substract 4K from %r10 */
-	jmp	LABEL(gobble_ashr_1)
-
-	/*
-	 * Once find null char, determine if there is a string mismatch
-	 * before the null char.
-	 */
-	.p2align 4
-LABEL(ashr_1_exittail):
-	movdqa	(%rsi, %rcx), %xmm1
-	psrldq	$1, %xmm0
-	psrldq	$1, %xmm3
-	jmp	LABEL(aftertail)
-
-/*
- * The following cases will be handled by ashr_2
- * rcx(offset of rsi)  rax(offset of rdi)   relative offset   	corresponding case
- *        n(14~15)            n -14         1(15 +(n-14) - n)         ashr_2
- */
-	.p2align 4
-LABEL(ashr_2):
-	pxor	%xmm0, %xmm0
-	movdqa	(%rdi), %xmm2
-	movdqa	(%rsi), %xmm1
-	pcmpeqb	%xmm1, %xmm0
-	pslldq	$14, %xmm2
-	pcmpeqb	%xmm1, %xmm2
-	psubb	%xmm0, %xmm2
-	pmovmskb %xmm2, %r9d
-	shr	%cl, %edx
-	shr	%cl, %r9d
-	sub	%r9d, %edx
-	jnz	LABEL(less32bytes)
-	movdqa	(%rdi), %xmm3
-	UPDATE_STRNCMP_COUNTER
-
-	pxor	%xmm0, %xmm0
-	mov	$16, %rcx	/* index for loads */
-	mov	$2, %r9d	/* byte position left over from less32bytes case */
-	/*
-	 * Setup %r10 value allows us to detect crossing a page boundary.
-	 * When %r10 goes positive we have crossed a page boundary and
-	 * need to do a nibble.
-	 */
-	lea	2(%rdi), %r10
-	and	$0xfff, %r10	/* offset into 4K page */
-	sub	$0x1000, %r10	/* subtract 4K pagesize */
-
-	.p2align 4
-LABEL(loop_ashr_2):
-	add	$16, %r10
-	jg	LABEL(nibble_ashr_2)
-
-LABEL(gobble_ashr_2):
-	movdqa	(%rsi, %rcx), %xmm1
-	movdqa	(%rdi, %rcx), %xmm2
-	movdqa	%xmm2, %xmm4
-
-#ifndef USE_SSSE3
-	psrldq	$2, %xmm3
-	pslldq	$14, %xmm2
-	por	%xmm3, %xmm2		/* merge into one 16byte value */
-#else
-	palignr	$2, %xmm3, %xmm2	/* merge into one 16byte value */
-#endif
-
-	pcmpeqb	%xmm1, %xmm0
-	pcmpeqb	%xmm2, %xmm1
-	psubb	%xmm0, %xmm1
-	pmovmskb %xmm1, %edx
-	sub	$0xffff, %edx
-	jnz	LABEL(exit)
+        cmp     %dl, %al		# check if same character
+        jne     LABEL(exitafter)
+        test    %al, %al		# check if character a NUL
+        jz      LABEL(exitafter)
 
-#ifdef USE_AS_STRNCMP
-	sub	$16, %r11
-	jbe	LABEL(strcmp_exitz)
-#endif
+        inc     %ecx
 
-	add	$16, %rcx
-	movdqa	%xmm4, %xmm3
+        inc     %r8
+        jnz     LABEL(alignloop)
 
-	add	$16, %r10
-	jg	LABEL(nibble_ashr_2)	/* cross page boundary */
-
-	movdqa	(%rsi, %rcx), %xmm1
-	movdqa	(%rdi, %rcx), %xmm2
-	movdqa	%xmm2, %xmm4
-
-#ifndef USE_SSSE3
-	psrldq	$2, %xmm3
-	pslldq	$14, %xmm2
-	por	%xmm3, %xmm2		/* merge into one 16byte value */
-#else
-	palignr	$2, %xmm3, %xmm2	/* merge into one 16byte value */
-#endif
-
-	pcmpeqb	%xmm1, %xmm0
-	pcmpeqb	%xmm2, %xmm1
-	psubb	%xmm0, %xmm1
-	pmovmskb %xmm1, %edx
-	sub	$0xffff, %edx
-	jnz	LABEL(exit)
+        .p2align 4
 
-#ifdef USE_AS_STRNCMP
-	sub	$16, %r11
-	jbe	LABEL(strcmp_exitz)
-#endif
+LABEL(alignafter):
 
-	add	$16, %rcx
-	movdqa	%xmm4, %xmm3
-	jmp	LABEL(loop_ashr_2)
-
-	.p2align 4
-LABEL(nibble_ashr_2):
-	pcmpeqb	%xmm3, %xmm0		/* check nibble for null char */
-	pmovmskb %xmm0, %edx
-	test	$0xfffc, %edx
-	jnz	LABEL(ashr_2_exittail)
+        mov	%r15, -32 (%rsp)
+        mov	%rbp, -24 (%rsp)
+        mov	%rbx, -16 (%rsp)
 
-#ifdef USE_AS_STRNCMP
-	cmp	$13, %r11
-	jbe	LABEL(ashr_2_exittail)
-#endif
+LABEL(pagealigntry):			# page align by "destination"
+	mov	$4096, %r15d		# page size is 4096
+        lea	(%rdi, %rcx), %ebp
+        and     $4095, %ebp		# page mask
+        sub	%r15d, %ebp
 
-	pxor	%xmm0, %xmm0
-	sub	$0x1000, %r10
-	jmp	LABEL(gobble_ashr_2)
-
-	.p2align 4
-LABEL(ashr_2_exittail):
-	movdqa	(%rsi, %rcx), %xmm1
-	psrldq	$2, %xmm0
-	psrldq	$2, %xmm3
-	jmp	LABEL(aftertail)
-
-/*
- * The following cases will be handled by ashr_3
- *  rcx(offset of rsi)  rax(offset of rdi)  relative offset	 corresponding case
- *        n(13~15)            n -13         2(15 +(n-13) - n)         ashr_3
- */
-	.p2align 4
-LABEL(ashr_3):
-	pxor	%xmm0, %xmm0
-	movdqa	(%rdi), %xmm2
-	movdqa	(%rsi), %xmm1
-	pcmpeqb	%xmm1, %xmm0
-	pslldq	$13, %xmm2
-	pcmpeqb	%xmm1, %xmm2
-	psubb	%xmm0, %xmm2
-	pmovmskb %xmm2, %r9d
-	shr	%cl, %edx
-	shr	%cl, %r9d
-	sub	%r9d, %edx
-	jnz	LABEL(less32bytes)
-	movdqa	(%rdi), %xmm3
-
-	UPDATE_STRNCMP_COUNTER
-
-	pxor	%xmm0, %xmm0
-	mov	$16, %rcx	/* index for loads */
-	mov	$3, %r9d	/* byte position left over from less32bytes case */
-	/*
-	 * Setup %r10 value allows us to detect crossing a page boundary.
-	 * When %r10 goes positive we have crossed a page boundary and
-	 * need to do a nibble.
-	 */
-	lea	3(%rdi), %r10
-	and	$0xfff, %r10	/* offset into 4K page */
-	sub	$0x1000, %r10	/* subtract 4K pagesize */
-
-	.p2align 4
-LABEL(loop_ashr_3):
-	add	$16, %r10
-	jg	LABEL(nibble_ashr_3)
-
-LABEL(gobble_ashr_3):
-	movdqa	(%rsi, %rcx), %xmm1
-	movdqa	(%rdi, %rcx), %xmm2
-	movdqa	%xmm2, %xmm4
-
-#ifndef USE_SSSE3
-	psrldq	$3, %xmm3
-	pslldq	$13, %xmm2
-	por	%xmm3, %xmm2		/* merge into one 16byte value */
-#else
-	palignr	$3, %xmm3, %xmm2	/* merge into one 16byte value */
-#endif
-
-	pcmpeqb	%xmm1, %xmm0
-	pcmpeqb	%xmm2, %xmm1
-	psubb	%xmm0, %xmm1
-	pmovmskb %xmm1, %edx
-	sub	$0xffff, %edx
-	jnz	LABEL(exit)
+LABEL(64):                              # 64-byte
+	mov     $0xfefefefefefefeff, %rbx # magic number
 
-#ifdef USE_AS_STRNCMP
-	sub	$16, %r11
-	jbe	LABEL(strcmp_exitz)
-#endif
+        .p2align 4
 
-	add	$16, %rcx
-	movdqa	%xmm4, %xmm3
+LABEL(64loop):
+	add	$64, %ebp		# check if "destination" crosses a page unevenly
+	jle	LABEL(64gobble)
 
-	add	$16, %r10
-	jg	LABEL(nibble_ashr_3)	/* cross page boundary */
-
-	movdqa	(%rsi, %rcx), %xmm1
-	movdqa	(%rdi, %rcx), %xmm2
-	movdqa	%xmm2, %xmm4
-
-#ifndef USE_SSSE3
-	psrldq	$3, %xmm3
-	pslldq	$13, %xmm2
-	por	%xmm3, %xmm2		/* merge into one 16byte value */
-#else
-	palignr	$3, %xmm3, %xmm2	/* merge into one 16byte value */
-#endif
-
-	pcmpeqb	%xmm1, %xmm0
-	pcmpeqb	%xmm2, %xmm1
-	psubb	%xmm0, %xmm1
-	pmovmskb %xmm1, %edx
-	sub	$0xffff, %edx
-	jnz	LABEL(exit)
+        sub	%r15d, %ebp
+        lea	64 (%rcx), %r8
 
-#ifdef USE_AS_STRNCMP
-	sub	$16, %r11
-	jbe	LABEL(strcmp_exitz)
-#endif
+        .p2align 4
 
-	add	$16, %rcx
-	movdqa	%xmm4, %xmm3
-	jmp	LABEL(loop_ashr_3)
-
-	.p2align 4
-LABEL(nibble_ashr_3):
-	pcmpeqb	%xmm3, %xmm0		/* check nibble for null char */
-	pmovmskb %xmm0, %edx
-	test	$0xfff8, %edx
-	jnz	LABEL(ashr_3_exittail)
+LABEL(64nibble):
+        mov     (%rsi, %rcx), %al
+        mov	(%rdi, %rcx), %dl
 
 #ifdef USE_AS_STRNCMP
-	cmp	$12, %r11
-	jbe	LABEL(ashr_3_exittail)
+	dec	%r14
+	jl	.exit
 #endif
 
-	pxor	%xmm0, %xmm0
-	sub	$0x1000, %r10
-	jmp	LABEL(gobble_ashr_3)
-
-	.p2align 4
-LABEL(ashr_3_exittail):
-	movdqa	(%rsi, %rcx), %xmm1
-	psrldq	$3, %xmm0
-	psrldq	$3, %xmm3
-	jmp	LABEL(aftertail)
-
-/*
- * The following cases will be handled by ashr_4
- *  rcx(offset of rsi)  rax(offset of rdi)  relative offset	 corresponding case
- *        n(12~15)            n -12         3(15 +(n-12) - n)         ashr_4
- */
-	.p2align 4
-LABEL(ashr_4):
-	pxor	%xmm0, %xmm0
-	movdqa	(%rdi), %xmm2
-	movdqa	(%rsi), %xmm1
-	pcmpeqb	%xmm1, %xmm0
-	pslldq	$12, %xmm2
-	pcmpeqb	%xmm1, %xmm2
-	psubb	%xmm0, %xmm2
-	pmovmskb %xmm2, %r9d
-	shr	%cl, %edx
-	shr	%cl, %r9d
-	sub	%r9d, %edx
-	jnz	LABEL(less32bytes)
-	movdqa	(%rdi), %xmm3
-
-	UPDATE_STRNCMP_COUNTER
-
-	pxor	%xmm0, %xmm0
-	mov	$16, %rcx	/* index for loads */
-	mov	$4, %r9d	/* byte position left over from less32bytes case */
-	/*
-	 * Setup %r10 value allows us to detect crossing a page boundary.
-	 * When %r10 goes positive we have crossed a page boundary and
-	 * need to do a nibble.
-	 */
-	lea	4(%rdi), %r10
-	and	$0xfff, %r10	/* offset into 4K page */
-	sub	$0x1000, %r10	/* subtract 4K pagesize */
-
-	.p2align 4
-LABEL(loop_ashr_4):
-	add	$16, %r10
-	jg	LABEL(nibble_ashr_4)
-
-LABEL(gobble_ashr_4):
-	movdqa	(%rsi, %rcx), %xmm1
-	movdqa	(%rdi, %rcx), %xmm2
-	movdqa	%xmm2, %xmm4
-
-#ifndef USE_SSSE3
-	psrldq	$4, %xmm3
-	pslldq	$12, %xmm2
-	por	%xmm3, %xmm2		/* merge into one 16byte value */
-#else
-	palignr	$4, %xmm3, %xmm2	/* merge into one 16byte value */
-#endif
-
-	pcmpeqb	%xmm1, %xmm0
-	pcmpeqb	%xmm2, %xmm1
-	psubb	%xmm0, %xmm1
-	pmovmskb %xmm1, %edx
-	sub	$0xffff, %edx
-	jnz	LABEL(exit)
+        cmp     %dl, %al		# check if same character
+        jne     .exit
+        test    %al, %al		# check if character a NUL
+        jz      .exit
 
-#ifdef USE_AS_STRNCMP
-	sub	$16, %r11
-	jbe	LABEL(strcmp_exitz)
-#endif
+        inc	%ecx
+
+        cmp	%ecx, %r8d
+        ja	LABEL(64nibble)
 
-	add	$16, %rcx
-	movdqa	%xmm4, %xmm3
+        .p2align 4
 
-	add	$16, %r10
-	jg	LABEL(nibble_ashr_4)	/* cross page boundary */
-
-	movdqa	(%rsi, %rcx), %xmm1
-	movdqa	(%rdi, %rcx), %xmm2
-	movdqa	%xmm2, %xmm4
-
-#ifndef USE_SSSE3
-	psrldq	$4, %xmm3
-	pslldq	$12, %xmm2
-	por	%xmm3, %xmm2		/* merge into one 16byte value */
-#else
-	palignr	$4, %xmm3, %xmm2	/* merge into one 16byte value */
-#endif
-
-	pcmpeqb	%xmm1, %xmm0
-	pcmpeqb	%xmm2, %xmm1
-	psubb	%xmm0, %xmm1
-	pmovmskb %xmm1, %edx
-	sub	$0xffff, %edx
-	jnz	LABEL(exit)
+LABEL(64gobble):
+        mov     (%rsi, %rcx), %rax
+        mov     (%rdi, %rcx), %rdx
 
 #ifdef USE_AS_STRNCMP
-	sub	$16, %r11
-	jbe	LABEL(strcmp_exitz)
+	sub	$8, %r14
+	jl	LABEL(tail)
 #endif
 
-	add	$16, %rcx
-	movdqa	%xmm4, %xmm3
-	jmp	LABEL(loop_ashr_4)
-
-	.p2align 4
-LABEL(nibble_ashr_4):
-	pcmpeqb	%xmm3, %xmm0		/* check nibble for null char */
-	pmovmskb %xmm0, %edx
-	test	$0xfff0, %edx
-	jnz	LABEL(ashr_4_exittail)
+        mov     %rbx, %r8
+        add     %rax, %r8
+        sbb     %r10, %r10
 
-#ifdef USE_AS_STRNCMP
-	cmp	$11, %r11
-	jbe	LABEL(ashr_4_exittail)
-#endif
+        mov     %rbx, %r9
+        add     %rdx, %r9
+        sbb     %r11, %r11
 
-	pxor	%xmm0, %xmm0
-	sub	$0x1000, %r10
-	jmp	LABEL(gobble_ashr_4)
-
-	.p2align 4
-LABEL(ashr_4_exittail):
-	movdqa	(%rsi, %rcx), %xmm1
-	psrldq	$4, %xmm0
-	psrldq	$4, %xmm3
-	jmp	LABEL(aftertail)
-
-/*
- * The following cases will be handled by ashr_5
- *  rcx(offset of rsi)  rax(offset of rdi)        relative offset      corresponding case
- *        n(11~15)          n - 11      	  4(15 +(n-11) - n)         ashr_5
- */
-	.p2align 4
-LABEL(ashr_5):
-	pxor	%xmm0, %xmm0
-	movdqa	(%rdi), %xmm2
-	movdqa	(%rsi), %xmm1
-	pcmpeqb	%xmm1, %xmm0
-	pslldq	$11, %xmm2
-	pcmpeqb	%xmm1, %xmm2
-	psubb	%xmm0, %xmm2
-	pmovmskb %xmm2, %r9d
-	shr	%cl, %edx
-	shr	%cl, %r9d
-	sub	%r9d, %edx
-	jnz	LABEL(less32bytes)
-	movdqa	(%rdi), %xmm3
-
-	UPDATE_STRNCMP_COUNTER
-
-	pxor	%xmm0, %xmm0
-	mov	$16, %rcx	/* index for loads */
-	mov	$5, %r9d	/* byte position left over from less32bytes case */
-	/*
-	 * Setup %r10 value allows us to detect crossing a page boundary.
-	 * When %r10 goes positive we have crossed a page boundary and
-	 * need to do a nibble.
-	 */
-	lea	5(%rdi), %r10
-	and	$0xfff, %r10	/* offset into 4K page */
-	sub	$0x1000, %r10	/* subtract 4K pagesize */
-
-	.p2align 4
-LABEL(loop_ashr_5):
-	add	$16, %r10
-	jg	LABEL(nibble_ashr_5)
-
-LABEL(gobble_ashr_5):
-	movdqa	(%rsi, %rcx), %xmm1
-	movdqa	(%rdi, %rcx), %xmm2
-	movdqa	%xmm2, %xmm4
-
-#ifndef USE_SSSE3
-	psrldq	$5, %xmm3
-	pslldq	$11, %xmm2
-	por	%xmm3, %xmm2		/* merge into one 16byte value */
-#else
-	palignr	$5, %xmm3, %xmm2	/* merge into one 16byte value */
-#endif
-
-	pcmpeqb	%xmm1, %xmm0
-	pcmpeqb	%xmm2, %xmm1
-	psubb	%xmm0, %xmm1
-	pmovmskb %xmm1, %edx
-	sub	$0xffff, %edx
-	jnz	LABEL(exit)
+        xor     %rax, %r8
+        or      %rbx, %r8
+        sub     %r10, %r8
+        jnz     LABEL(tail)
 
-#ifdef USE_AS_STRNCMP
-	sub	$16, %r11
-	jbe	LABEL(strcmp_exitz)
-#endif
+        xor     %rdx, %r9
+        or      %rbx, %r9
+        sub     %r11, %r9
+        jnz     LABEL(tail)
 
-	add	$16, %rcx
-	movdqa	%xmm4, %xmm3
+        cmp     %rdx, %rax
+        jne     LABEL(tail)
 
-	add	$16, %r10
-	jg	LABEL(nibble_ashr_5)	/* cross page boundary */
-
-	movdqa	(%rsi, %rcx), %xmm1
-	movdqa	(%rdi, %rcx), %xmm2
-	movdqa	%xmm2, %xmm4
-
-#ifndef USE_SSSE3
-	psrldq	$5, %xmm3
-	pslldq	$11, %xmm2
-	por	%xmm3, %xmm2		/* merge into one 16byte value */
-#else
-	palignr	$5, %xmm3, %xmm2	/* merge into one 16byte value */
-#endif
-
-	pcmpeqb	%xmm1, %xmm0
-	pcmpeqb	%xmm2, %xmm1
-	psubb	%xmm0, %xmm1
-	pmovmskb %xmm1, %edx
-	sub	$0xffff, %edx
-	jnz	LABEL(exit)
+        mov     8 (%rsi, %rcx), %rax
+        mov     8 (%rdi, %rcx), %rdx
+        add     $8, %ecx
 
 #ifdef USE_AS_STRNCMP
-	sub	$16, %r11
-	jbe	LABEL(strcmp_exitz)
+	sub	$8, %r14
+	jl	LABEL(tail)
 #endif
 
-	add	$16, %rcx
-	movdqa	%xmm4, %xmm3
-	jmp	LABEL(loop_ashr_5)
-
-	.p2align 4
-LABEL(nibble_ashr_5):
-	pcmpeqb	%xmm3, %xmm0		/* check nibble for null char */
-	pmovmskb %xmm0, %edx
-	test	$0xffe0, %edx
-	jnz	LABEL(ashr_5_exittail)
+        mov     %rbx, %r8
+        add     %rax, %r8
+        sbb     %r10, %r10
 
-#ifdef USE_AS_STRNCMP
-	cmp	$10, %r11
-	jbe	LABEL(ashr_5_exittail)
-#endif
+        mov     %rbx, %r9
+        add     %rdx, %r9
+        sbb     %r11, %r11
 
-	pxor	%xmm0, %xmm0
-	sub	$0x1000, %r10
-	jmp	LABEL(gobble_ashr_5)
-
-	.p2align 4
-LABEL(ashr_5_exittail):
-	movdqa	(%rsi, %rcx), %xmm1
-	psrldq	$5, %xmm0
-	psrldq	$5, %xmm3
-	jmp	LABEL(aftertail)
-
-/*
- * The following cases will be handled by ashr_6
- *  rcx(offset of rsi)  rax(offset of rdi)        relative offset      corresponding case
- *        n(10~15)          n - 10      	  5(15 +(n-10) - n)         ashr_6
- */
-	.p2align 4
-LABEL(ashr_6):
-	pxor	%xmm0, %xmm0
-	movdqa	(%rdi), %xmm2
-	movdqa	(%rsi), %xmm1
-	pcmpeqb	%xmm1, %xmm0
-	pslldq	$10, %xmm2
-	pcmpeqb	%xmm1, %xmm2
-	psubb	%xmm0, %xmm2
-	pmovmskb %xmm2, %r9d
-	shr	%cl, %edx
-	shr	%cl, %r9d
-	sub	%r9d, %edx
-	jnz	LABEL(less32bytes)
-	movdqa	(%rdi), %xmm3
-
-	UPDATE_STRNCMP_COUNTER
-
-	pxor	%xmm0, %xmm0
-	mov	$16, %rcx	/* index for loads */
-	mov	$6, %r9d	/* byte position left over from less32bytes case */
-	/*
-	 * Setup %r10 value allows us to detect crossing a page boundary.
-	 * When %r10 goes positive we have crossed a page boundary and
-	 * need to do a nibble.
-	 */
-	lea	6(%rdi), %r10
-	and	$0xfff, %r10	/* offset into 4K page */
-	sub	$0x1000, %r10	/* subtract 4K pagesize */
-
-	.p2align 4
-LABEL(loop_ashr_6):
-	add	$16, %r10
-	jg	LABEL(nibble_ashr_6)
-
-LABEL(gobble_ashr_6):
-	movdqa	(%rsi, %rcx), %xmm1
-	movdqa	(%rdi, %rcx), %xmm2
-	movdqa	%xmm2, %xmm4
-
-#ifndef USE_SSSE3
-	psrldq	$6, %xmm3
-	pslldq	$10, %xmm2
-	por	%xmm3, %xmm2		/* merge into one 16byte value */
-#else
-	palignr	$6, %xmm3, %xmm2	/* merge into one 16byte value */
-#endif
-
-	pcmpeqb	%xmm1, %xmm0
-	pcmpeqb	%xmm2, %xmm1
-	psubb	%xmm0, %xmm1
-	pmovmskb %xmm1, %edx
-	sub	$0xffff, %edx
-	jnz	LABEL(exit)
+        xor     %rax, %r8
+        or      %rbx, %r8
+        sub     %r10, %r8
+        jnz     LABEL(tail)
 
-#ifdef USE_AS_STRNCMP
-	sub	$16, %r11
-	jbe	LABEL(strcmp_exitz)
-#endif
+        xor     %rdx, %r9
+        or      %rbx, %r9
+        sub     %r11, %r9
+        jnz     LABEL(tail)
 
-	add	$16, %rcx
-	movdqa	%xmm4, %xmm3
+        cmp     %rdx, %rax
+        jne     LABEL(tail)
 
-	add	$16, %r10
-	jg	LABEL(nibble_ashr_6)	/* cross page boundary */
-
-	movdqa	(%rsi, %rcx), %xmm1
-	movdqa	(%rdi, %rcx), %xmm2
-	movdqa	%xmm2, %xmm4
-
-#ifndef USE_SSSE3
-	psrldq	$6, %xmm3
-	pslldq	$10, %xmm2
-	por	%xmm3, %xmm2		/* merge into one 16byte value */
-#else
-	palignr	$6, %xmm3, %xmm2	/* merge into one 16byte value */
-#endif
-
-	pcmpeqb	%xmm1, %xmm0
-	pcmpeqb	%xmm2, %xmm1
-	psubb	%xmm0, %xmm1
-	pmovmskb %xmm1, %edx
-	sub	$0xffff, %edx
-	jnz	LABEL(exit)
+        mov     8 (%rsi, %rcx), %rax
+        mov     8 (%rdi, %rcx), %rdx
+        add     $8, %ecx
 
 #ifdef USE_AS_STRNCMP
-	sub	$16, %r11
-	jbe	LABEL(strcmp_exitz)
+	sub	$8, %r14
+	jl	LABEL(tail)
 #endif
 
-	add	$16, %rcx
-	movdqa	%xmm4, %xmm3
-	jmp	LABEL(loop_ashr_6)
-
-	.p2align 4
-LABEL(nibble_ashr_6):
-	pcmpeqb	%xmm3, %xmm0		/* check nibble for null char */
-	pmovmskb %xmm0, %edx
-	test	$0xffc0, %edx
-	jnz	LABEL(ashr_6_exittail)
+        mov     %rbx, %r8
+        add     %rax, %r8
+        sbb     %r10, %r10
 
-#ifdef USE_AS_STRNCMP
-	cmp	$9, %r11
-	jbe	LABEL(ashr_6_exittail)
-#endif
+        mov     %rbx, %r9
+        add     %rdx, %r9
+        sbb     %r11, %r11
 
-	pxor	%xmm0, %xmm0
-	sub	$0x1000, %r10
-	jmp	LABEL(gobble_ashr_6)
-
-	.p2align 4
-LABEL(ashr_6_exittail):
-	movdqa	(%rsi, %rcx), %xmm1
-	psrldq	$6, %xmm0
-	psrldq	$6, %xmm3
-	jmp	LABEL(aftertail)
-
-/*
- * The following cases will be handled by ashr_7
- *  rcx(offset of rsi)  rax(offset of rdi)        relative offset      corresponding case
- *        n(9~15)          n - 9      	        6(15 +(n - 9) - n)         ashr_7
- */
-	.p2align 4
-LABEL(ashr_7):
-	pxor	%xmm0, %xmm0
-	movdqa	(%rdi), %xmm2
-	movdqa	(%rsi), %xmm1
-	pcmpeqb	%xmm1, %xmm0
-	pslldq	$9, %xmm2
-	pcmpeqb	%xmm1, %xmm2
-	psubb	%xmm0, %xmm2
-	pmovmskb %xmm2, %r9d
-	shr	%cl, %edx
-	shr	%cl, %r9d
-	sub	%r9d, %edx
-	jnz	LABEL(less32bytes)
-	movdqa	(%rdi), %xmm3
-
-	UPDATE_STRNCMP_COUNTER
-
-	pxor	%xmm0, %xmm0
-	mov	$16, %rcx	/* index for loads */
-	mov	$7, %r9d	/* byte position left over from less32bytes case */
-	/*
-	 * Setup %r10 value allows us to detect crossing a page boundary.
-	 * When %r10 goes positive we have crossed a page boundary and
-	 * need to do a nibble.
-	 */
-	lea	7(%rdi), %r10
-	and	$0xfff, %r10	/* offset into 4K page */
-	sub	$0x1000, %r10	/* subtract 4K pagesize */
-
-	.p2align 4
-LABEL(loop_ashr_7):
-	add	$16, %r10
-	jg	LABEL(nibble_ashr_7)
-
-LABEL(gobble_ashr_7):
-	movdqa	(%rsi, %rcx), %xmm1
-	movdqa	(%rdi, %rcx), %xmm2
-	movdqa	%xmm2, %xmm4
-
-#ifndef USE_SSSE3
-	psrldq	$7, %xmm3
-	pslldq	$9, %xmm2
-	por	%xmm3, %xmm2		/* merge into one 16byte value */
-#else
-	palignr	$7, %xmm3, %xmm2	/* merge into one 16byte value */
-#endif
-
-	pcmpeqb	%xmm1, %xmm0
-	pcmpeqb	%xmm2, %xmm1
-	psubb	%xmm0, %xmm1
-	pmovmskb %xmm1, %edx
-	sub	$0xffff, %edx
-	jnz	LABEL(exit)
+        xor     %rax, %r8
+        or      %rbx, %r8
+        sub     %r10, %r8
+        jnz     LABEL(tail)
 
-#ifdef USE_AS_STRNCMP
-	sub	$16, %r11
-	jbe	LABEL(strcmp_exitz)
-#endif
+        xor     %rdx, %r9
+        or      %rbx, %r9
+        sub     %r11, %r9
+        jnz     LABEL(tail)
 
-	add	$16, %rcx
-	movdqa	%xmm4, %xmm3
+        cmp     %rdx, %rax
+        jne     LABEL(tail)
 
-	add	$16, %r10
-	jg	LABEL(nibble_ashr_7)	/* cross page boundary */
-
-	movdqa	(%rsi, %rcx), %xmm1
-	movdqa	(%rdi, %rcx), %xmm2
-	movdqa	%xmm2, %xmm4
-
-#ifndef USE_SSSE3
-	psrldq	$7, %xmm3
-	pslldq	$9, %xmm2
-	por	%xmm3, %xmm2		/* merge into one 16byte value */
-#else
-	palignr	$7, %xmm3, %xmm2	/* merge into one 16byte value */
-#endif
-
-	pcmpeqb	%xmm1, %xmm0
-	pcmpeqb	%xmm2, %xmm1
-	psubb	%xmm0, %xmm1
-	pmovmskb %xmm1, %edx
-	sub	$0xffff, %edx
-	jnz	LABEL(exit)
+        mov     8 (%rsi, %rcx), %rax
+        mov     8 (%rdi, %rcx), %rdx
+        add     $8, %ecx
 
 #ifdef USE_AS_STRNCMP
-	sub	$16, %r11
-	jbe	LABEL(strcmp_exitz)
+	sub	$8, %r14
+	jl	LABEL(tail)
 #endif
 
-	add	$16, %rcx
-	movdqa	%xmm4, %xmm3
-	jmp	LABEL(loop_ashr_7)
-
-	.p2align 4
-LABEL(nibble_ashr_7):
-	pcmpeqb	%xmm3, %xmm0		/* check nibble for null char */
-	pmovmskb %xmm0, %edx
-	test	$0xff80, %edx
-	jnz	LABEL(ashr_7_exittail)
+        mov     %rbx, %r8
+        add     %rax, %r8
+        sbb     %r10, %r10
 
-#ifdef USE_AS_STRNCMP
-	cmp	$8, %r11
-	jbe	LABEL(ashr_7_exittail)
-#endif
+        mov     %rbx, %r9
+        add     %rdx, %r9
+        sbb     %r11, %r11
 
-	pxor	%xmm0, %xmm0
-	sub	$0x1000, %r10
-	jmp	LABEL(gobble_ashr_7)
-
-	.p2align 4
-LABEL(ashr_7_exittail):
-	movdqa	(%rsi, %rcx), %xmm1
-	psrldq	$7, %xmm0
-	psrldq	$7, %xmm3
-	jmp	LABEL(aftertail)
-
-/*
- *  The following cases will be handled by ashr_8
- *  rcx(offset of rsi)  rax(offset of rdi)        relative offset	 corresponding case
- *        n(8~15)          n - 8      	        7(15 +(n - 8) - n)         ashr_8
- */
-	.p2align 4
-LABEL(ashr_8):
-	pxor	%xmm0, %xmm0
-	movdqa	(%rdi), %xmm2
-	movdqa	(%rsi), %xmm1
-	pcmpeqb	%xmm1, %xmm0
-	pslldq	$8, %xmm2
-	pcmpeqb	%xmm1, %xmm2
-	psubb	%xmm0, %xmm2
-	pmovmskb %xmm2, %r9d
-	shr	%cl, %edx
-	shr	%cl, %r9d
-	sub	%r9d, %edx
-	jnz	LABEL(less32bytes)
-	movdqa	(%rdi), %xmm3
-
-	UPDATE_STRNCMP_COUNTER
-
-	pxor	%xmm0, %xmm0
-	mov	$16, %rcx	/* index for loads */
-	mov	$8, %r9d	/* byte position left over from less32bytes case */
-	/*
-	 * Setup %r10 value allows us to detect crossing a page boundary.
-	 * When %r10 goes positive we have crossed a page boundary and
-	 * need to do a nibble.
-	 */
-	lea	8(%rdi), %r10
-	and	$0xfff, %r10	/* offset into 4K page */
-	sub	$0x1000, %r10	/* subtract 4K pagesize */
-
-	.p2align 4
-LABEL(loop_ashr_8):
-	add	$16, %r10
-	jg	LABEL(nibble_ashr_8)
-
-LABEL(gobble_ashr_8):
-	movdqa	(%rsi, %rcx), %xmm1
-	movdqa	(%rdi, %rcx), %xmm2
-	movdqa	%xmm2, %xmm4
-
-#ifndef USE_SSSE3
-	psrldq	$8, %xmm3
-	pslldq	$8, %xmm2
-	por	%xmm3, %xmm2		/* merge into one 16byte value */
-#else
-	palignr	$8, %xmm3, %xmm2	/* merge into one 16byte value */
-#endif
-
-	pcmpeqb	%xmm1, %xmm0
-	pcmpeqb	%xmm2, %xmm1
-	psubb	%xmm0, %xmm1
-	pmovmskb %xmm1, %edx
-	sub	$0xffff, %edx
-	jnz	LABEL(exit)
+        xor     %rax, %r8
+        or      %rbx, %r8
+        sub     %r10, %r8
+        jnz     LABEL(tail)
 
-#ifdef USE_AS_STRNCMP
-	sub	$16, %r11
-	jbe	LABEL(strcmp_exitz)
-#endif
+        xor     %rdx, %r9
+        or      %rbx, %r9
+        sub     %r11, %r9
+        jnz     LABEL(tail)
 
-	add	$16, %rcx
-	movdqa	%xmm4, %xmm3
+        cmp     %rdx, %rax
+        jne     LABEL(tail)
 
-	add	$16, %r10
-	jg	LABEL(nibble_ashr_8)	/* cross page boundary */
-
-	movdqa	(%rsi, %rcx), %xmm1
-	movdqa	(%rdi, %rcx), %xmm2
-	movdqa	%xmm2, %xmm4
-
-#ifndef USE_SSSE3
-	psrldq	$8, %xmm3
-	pslldq	$8, %xmm2
-	por	%xmm3, %xmm2		/* merge into one 16byte value */
-#else
-	palignr	$8, %xmm3, %xmm2	/* merge into one 16byte value */
-#endif
-
-	pcmpeqb	%xmm1, %xmm0
-	pcmpeqb	%xmm2, %xmm1
-	psubb	%xmm0, %xmm1
-	pmovmskb %xmm1, %edx
-	sub	$0xffff, %edx
-	jnz	LABEL(exit)
+        mov     8 (%rsi, %rcx), %rax
+        mov     8 (%rdi, %rcx), %rdx
+        add     $8, %ecx
 
 #ifdef USE_AS_STRNCMP
-	sub	$16, %r11
-	jbe	LABEL(strcmp_exitz)
+	sub	$8, %r14
+	jl	LABEL(tail)
 #endif
 
-	add	$16, %rcx
-	movdqa	%xmm4, %xmm3
-	jmp	LABEL(loop_ashr_8)
-
-	.p2align 4
-LABEL(nibble_ashr_8):
-	pcmpeqb	%xmm3, %xmm0		/* check nibble for null char */
-	pmovmskb %xmm0, %edx
-	test	$0xff00, %edx
-	jnz	LABEL(ashr_8_exittail)
+        mov     %rbx, %r8
+        add     %rax, %r8
+        sbb     %r10, %r10
 
-#ifdef USE_AS_STRNCMP
-	cmp	$7, %r11
-	jbe	LABEL(ashr_8_exittail)
-#endif
+        mov     %rbx, %r9
+        add     %rdx, %r9
+        sbb     %r11, %r11
 
-	pxor	%xmm0, %xmm0
-	sub	$0x1000, %r10
-	jmp	LABEL(gobble_ashr_8)
-
-	.p2align 4
-LABEL(ashr_8_exittail):
-	movdqa	(%rsi, %rcx), %xmm1
-	psrldq	$8, %xmm0
-	psrldq	$8, %xmm3
-	jmp	LABEL(aftertail)
-
-/*
- *  The following cases will be handled by ashr_9
- *  rcx(offset of rsi)  rax(offset of rdi)        relative offset	 corresponding case
- *        n(7~15)          n - 7      	        8(15 +(n - 7) - n)         ashr_9
- */
-	.p2align 4
-LABEL(ashr_9):
-	pxor	%xmm0, %xmm0
-	movdqa	(%rdi), %xmm2
-	movdqa	(%rsi), %xmm1
-	pcmpeqb	%xmm1, %xmm0
-	pslldq	$7, %xmm2
-	pcmpeqb	%xmm1, %xmm2
-	psubb	%xmm0, %xmm2
-	pmovmskb %xmm2, %r9d
-	shr	%cl, %edx
-	shr	%cl, %r9d
-	sub	%r9d, %edx
-	jnz	LABEL(less32bytes)
-	movdqa	(%rdi), %xmm3
-
-	UPDATE_STRNCMP_COUNTER
-
-	pxor	%xmm0, %xmm0
-	mov	$16, %rcx	/* index for loads */
-	mov	$9, %r9d	/* byte position left over from less32bytes case */
-	/*
-	 * Setup %r10 value allows us to detect crossing a page boundary.
-	 * When %r10 goes positive we have crossed a page boundary and
-	 * need to do a nibble.
-	 */
-	lea	9(%rdi), %r10
-	and	$0xfff, %r10	/* offset into 4K page */
-	sub	$0x1000, %r10	/* subtract 4K pagesize */
-
-	.p2align 4
-LABEL(loop_ashr_9):
-	add	$16, %r10
-	jg	LABEL(nibble_ashr_9)
-
-LABEL(gobble_ashr_9):
-	movdqa	(%rsi, %rcx), %xmm1
-	movdqa	(%rdi, %rcx), %xmm2
-	movdqa	%xmm2, %xmm4
-
-#ifndef USE_SSSE3
-	psrldq	$9, %xmm3
-	pslldq	$7, %xmm2
-	por	%xmm3, %xmm2		/* merge into one 16byte value */
-#else
-	palignr	$9, %xmm3, %xmm2	/* merge into one 16byte value */
-#endif
-
-	pcmpeqb	%xmm1, %xmm0
-	pcmpeqb	%xmm2, %xmm1
-	psubb	%xmm0, %xmm1
-	pmovmskb %xmm1, %edx
-	sub	$0xffff, %edx
-	jnz	LABEL(exit)
+        xor     %rax, %r8
+        or      %rbx, %r8
+        sub     %r10, %r8
+        jnz     LABEL(tail)
 
-#ifdef USE_AS_STRNCMP
-	sub	$16, %r11
-	jbe	LABEL(strcmp_exitz)
-#endif
+        xor     %rdx, %r9
+        or      %rbx, %r9
+        sub     %r11, %r9
+        jnz     LABEL(tail)
 
-	add	$16, %rcx
-	movdqa	%xmm4, %xmm3
+        cmp     %rdx, %rax
+        jne     LABEL(tail)
 
-	add	$16, %r10
-	jg	LABEL(nibble_ashr_9)	/* cross page boundary */
-
-	movdqa	(%rsi, %rcx), %xmm1
-	movdqa	(%rdi, %rcx), %xmm2
-	movdqa	%xmm2, %xmm4
-
-#ifndef USE_SSSE3
-	psrldq	$9, %xmm3
-	pslldq	$7, %xmm2
-	por	%xmm3, %xmm2		/* merge into one 16byte value */
-#else
-	palignr	$9, %xmm3, %xmm2	/* merge into one 16byte value */
-#endif
-
-	pcmpeqb	%xmm1, %xmm0
-	pcmpeqb	%xmm2, %xmm1
-	psubb	%xmm0, %xmm1
-	pmovmskb %xmm1, %edx
-	sub	$0xffff, %edx
-	jnz	LABEL(exit)
+        mov     8 (%rsi, %rcx), %rax
+        mov     8 (%rdi, %rcx), %rdx
+        add     $8, %ecx
 
 #ifdef USE_AS_STRNCMP
-	sub	$16, %r11
-	jbe	LABEL(strcmp_exitz)
+	sub	$8, %r14
+	jl	LABEL(tail)
 #endif
 
-	add	$16, %rcx
-	movdqa	%xmm4, %xmm3		/* store for next cycle */
-	jmp	LABEL(loop_ashr_9)
-
-	.p2align 4
-LABEL(nibble_ashr_9):
-	pcmpeqb	%xmm3, %xmm0		/* check nibble for null char */
-	pmovmskb %xmm0, %edx
-	test	$0xfe00, %edx
-	jnz	LABEL(ashr_9_exittail)
+        mov     %rbx, %r8
+        add     %rax, %r8
+        sbb     %r10, %r10
 
-#ifdef USE_AS_STRNCMP
-	cmp	$6, %r11
-	jbe	LABEL(ashr_9_exittail)
-#endif
+        mov     %rbx, %r9
+        add     %rdx, %r9
+        sbb     %r11, %r11
 
-	pxor	%xmm0, %xmm0
-	sub	$0x1000, %r10
-	jmp	LABEL(gobble_ashr_9)
-
-	.p2align 4
-LABEL(ashr_9_exittail):
-	movdqa	(%rsi, %rcx), %xmm1
-	psrldq	$9, %xmm0
-	psrldq	$9, %xmm3
-	jmp	LABEL(aftertail)
-
-/*
- *  The following cases will be handled by ashr_10
- *  rcx(offset of rsi)  rax(offset of rdi)        relative offset	 corresponding case
- *        n(6~15)          n - 6      	        9(15 +(n - 6) - n)         ashr_10
- */
-	.p2align 4
-LABEL(ashr_10):
-	pxor	%xmm0, %xmm0
-	movdqa	(%rdi), %xmm2
-	movdqa	(%rsi), %xmm1
-	pcmpeqb	%xmm1, %xmm0
-	pslldq	$6, %xmm2
-	pcmpeqb	%xmm1, %xmm2
-	psubb	%xmm0, %xmm2
-	pmovmskb %xmm2, %r9d
-	shr	%cl, %edx
-	shr	%cl, %r9d
-	sub	%r9d, %edx
-	jnz	LABEL(less32bytes)
-	movdqa	(%rdi), %xmm3
-
-	UPDATE_STRNCMP_COUNTER
-
-	pxor	%xmm0, %xmm0
-	mov	$16, %rcx	/* index for loads */
-	mov	$10, %r9d	/* byte position left over from less32bytes case */
-	/*
-	 * Setup %r10 value allows us to detect crossing a page boundary.
-	 * When %r10 goes positive we have crossed a page boundary and
-	 * need to do a nibble.
-	 */
-	lea	10(%rdi), %r10
-	and	$0xfff, %r10	/* offset into 4K page */
-	sub	$0x1000, %r10	/* subtract 4K pagesize */
-
-	.p2align 4
-LABEL(loop_ashr_10):
-	add	$16, %r10
-	jg	LABEL(nibble_ashr_10)
-
-LABEL(gobble_ashr_10):
-	movdqa	(%rsi, %rcx), %xmm1
-	movdqa	(%rdi, %rcx), %xmm2
-	movdqa	%xmm2, %xmm4
-
-#ifndef USE_SSSE3
-	psrldq	$10, %xmm3
-	pslldq	$6, %xmm2
-	por	%xmm3, %xmm2		/* merge into one 16byte value */
-#else
-	palignr	$10, %xmm3, %xmm2	/* merge into one 16byte value */
-#endif
-
-	pcmpeqb	%xmm1, %xmm0
-	pcmpeqb	%xmm2, %xmm1
-	psubb	%xmm0, %xmm1
-	pmovmskb %xmm1, %edx
-	sub	$0xffff, %edx
-	jnz	LABEL(exit)
+        xor     %rax, %r8
+        or      %rbx, %r8
+        sub     %r10, %r8
+        jnz     LABEL(tail)
 
-#ifdef USE_AS_STRNCMP
-	sub	$16, %r11
-	jbe	LABEL(strcmp_exitz)
-#endif
+        xor     %rdx, %r9
+        or      %rbx, %r9
+        sub     %r11, %r9
+        jnz     LABEL(tail)
 
-	add	$16, %rcx
-	movdqa	%xmm4, %xmm3
+        cmp     %rdx, %rax
+        jne     LABEL(tail)
 
-	add	$16, %r10
-	jg	LABEL(nibble_ashr_10)	/* cross page boundary */
-
-	movdqa	(%rsi, %rcx), %xmm1
-	movdqa	(%rdi, %rcx), %xmm2
-	movdqa	%xmm2, %xmm4
-
-#ifndef USE_SSSE3
-	psrldq	$10, %xmm3
-	pslldq	$6, %xmm2
-	por	%xmm3, %xmm2		/* merge into one 16byte value */
-#else
-	palignr	$10, %xmm3, %xmm2	/* merge into one 16byte value */
-#endif
-
-	pcmpeqb	%xmm1, %xmm0
-	pcmpeqb	%xmm2, %xmm1
-	psubb	%xmm0, %xmm1
-	pmovmskb %xmm1, %edx
-	sub	$0xffff, %edx
-	jnz	LABEL(exit)
+        mov     8 (%rsi, %rcx), %rax
+        mov     8 (%rdi, %rcx), %rdx
+        add     $8, %ecx
 
 #ifdef USE_AS_STRNCMP
-	sub	$16, %r11
-	jbe	LABEL(strcmp_exitz)
+	sub	$8, %r14
+	jl	LABEL(tail)
 #endif
 
-	add	$16, %rcx
-	movdqa	%xmm4, %xmm3
-	jmp	LABEL(loop_ashr_10)
-
-	.p2align 4
-LABEL(nibble_ashr_10):
-	pcmpeqb	%xmm3, %xmm0		/* check nibble for null char */
-	pmovmskb %xmm0, %edx
-	test	$0xfc00, %edx
-	jnz	LABEL(ashr_10_exittail)
+        mov     %rbx, %r8
+        add     %rax, %r8
+        sbb     %r10, %r10
 
-#ifdef USE_AS_STRNCMP
-	cmp	$5, %r11
-	jbe	LABEL(ashr_10_exittail)
-#endif
+        mov     %rbx, %r9
+        add     %rdx, %r9
+        sbb     %r11, %r11
 
-	pxor	%xmm0, %xmm0
-	sub	$0x1000, %r10
-	jmp	LABEL(gobble_ashr_10)
-
-	.p2align 4
-LABEL(ashr_10_exittail):
-	movdqa	(%rsi, %rcx), %xmm1
-	psrldq	$10, %xmm0
-	psrldq	$10, %xmm3
-	jmp	LABEL(aftertail)
-
-/*
- *  The following cases will be handled by ashr_11
- *  rcx(offset of rsi)  rax(offset of rdi)        relative offset	 corresponding case
- *        n(5~15)          n - 5      	        10(15 +(n - 5) - n)         ashr_11
- */
-	.p2align 4
-LABEL(ashr_11):
-	pxor	%xmm0, %xmm0
-	movdqa	(%rdi), %xmm2
-	movdqa	(%rsi), %xmm1
-	pcmpeqb	%xmm1, %xmm0
-	pslldq	$5, %xmm2
-	pcmpeqb	%xmm1, %xmm2
-	psubb	%xmm0, %xmm2
-	pmovmskb %xmm2, %r9d
-	shr	%cl, %edx
-	shr	%cl, %r9d
-	sub	%r9d, %edx
-	jnz	LABEL(less32bytes)
-	movdqa	(%rdi), %xmm3
-
-	UPDATE_STRNCMP_COUNTER
-
-	pxor	%xmm0, %xmm0
-	mov	$16, %rcx	/* index for loads */
-	mov	$11, %r9d	/* byte position left over from less32bytes case */
-	/*
-	 * Setup %r10 value allows us to detect crossing a page boundary.
-	 * When %r10 goes positive we have crossed a page boundary and
-	 * need to do a nibble.
-	 */
-	lea	11(%rdi), %r10
-	and	$0xfff, %r10	/* offset into 4K page */
-	sub	$0x1000, %r10	/* subtract 4K pagesize */
-
-	.p2align 4
-LABEL(loop_ashr_11):
-	add	$16, %r10
-	jg	LABEL(nibble_ashr_11)
-
-LABEL(gobble_ashr_11):
-	movdqa	(%rsi, %rcx), %xmm1
-	movdqa	(%rdi, %rcx), %xmm2
-	movdqa	%xmm2, %xmm4
-
-#ifndef USE_SSSE3
-	psrldq	$11, %xmm3
-	pslldq	$5, %xmm2
-	por	%xmm3, %xmm2		/* merge into one 16byte value */
-#else
-	palignr	$11, %xmm3, %xmm2	/* merge into one 16byte value */
-#endif
-
-	pcmpeqb	%xmm1, %xmm0
-	pcmpeqb	%xmm2, %xmm1
-	psubb	%xmm0, %xmm1
-	pmovmskb %xmm1, %edx
-	sub	$0xffff, %edx
-	jnz	LABEL(exit)
+        xor     %rax, %r8
+        or      %rbx, %r8
+        sub     %r10, %r8
+        jnz     LABEL(tail)
 
-#ifdef USE_AS_STRNCMP
-	sub	$16, %r11
-	jbe	LABEL(strcmp_exitz)
-#endif
+        xor     %rdx, %r9
+        or      %rbx, %r9
+        sub     %r11, %r9
+        jnz     LABEL(tail)
 
-	add	$16, %rcx
-	movdqa	%xmm4, %xmm3
+        cmp     %rdx, %rax
+        jne     LABEL(tail)
 
-	add	$16, %r10
-	jg	LABEL(nibble_ashr_11)	/* cross page boundary */
-
-	movdqa	(%rsi, %rcx), %xmm1
-	movdqa	(%rdi, %rcx), %xmm2
-	movdqa	%xmm2, %xmm4
-
-#ifndef USE_SSSE3
-	psrldq	$11, %xmm3
-	pslldq	$5, %xmm2
-	por	%xmm3, %xmm2		/* merge into one 16byte value */
-#else
-	palignr	$11, %xmm3, %xmm2	/* merge into one 16byte value */
-#endif
-
-	pcmpeqb	%xmm1, %xmm0
-	pcmpeqb	%xmm2, %xmm1
-	psubb	%xmm0, %xmm1
-	pmovmskb %xmm1, %edx
-	sub	$0xffff, %edx
-	jnz	LABEL(exit)
+        mov     8 (%rsi, %rcx), %rax
+        mov     8 (%rdi, %rcx), %rdx
+        add     $8, %ecx
 
 #ifdef USE_AS_STRNCMP
-	sub	$16, %r11
-	jbe	LABEL(strcmp_exitz)
+	sub	$8, %r14
+	jl	LABEL(tail)
 #endif
 
-	add	$16, %rcx
-	movdqa	%xmm4, %xmm3
-	jmp	LABEL(loop_ashr_11)
-
-	.p2align 4
-LABEL(nibble_ashr_11):
-	pcmpeqb	%xmm3, %xmm0		/* check nibble for null char */
-	pmovmskb %xmm0, %edx
-	test	$0xf800, %edx
-	jnz	LABEL(ashr_11_exittail)
+        mov     %rbx, %r8
+        add     %rax, %r8
+        sbb     %r10, %r10
 
-#ifdef USE_AS_STRNCMP
-	cmp	$4, %r11
-	jbe	LABEL(ashr_11_exittail)
-#endif
+        mov     %rbx, %r9
+        add     %rdx, %r9
+        sbb     %r11, %r11
 
-	pxor	%xmm0, %xmm0
-	sub	$0x1000, %r10
-	jmp	LABEL(gobble_ashr_11)
-
-	.p2align 4
-LABEL(ashr_11_exittail):
-	movdqa	(%rsi, %rcx), %xmm1
-	psrldq	$11, %xmm0
-	psrldq	$11, %xmm3
-	jmp	LABEL(aftertail)
-
-/*
- *  The following cases will be handled by ashr_12
- *  rcx(offset of rsi)  rax(offset of rdi)        relative offset	 corresponding case
- *        n(4~15)          n - 4      	        11(15 +(n - 4) - n)         ashr_12
- */
-	.p2align 4
-LABEL(ashr_12):
-	pxor	%xmm0, %xmm0
-	movdqa	(%rdi), %xmm2
-	movdqa	(%rsi), %xmm1
-	pcmpeqb	%xmm1, %xmm0
-	pslldq	$4, %xmm2
-	pcmpeqb	%xmm1, %xmm2
-	psubb	%xmm0, %xmm2
-	pmovmskb %xmm2, %r9d
-	shr	%cl, %edx
-	shr	%cl, %r9d
-	sub	%r9d, %edx
-	jnz	LABEL(less32bytes)
-	movdqa	(%rdi), %xmm3
-
-	UPDATE_STRNCMP_COUNTER
-
-	pxor	%xmm0, %xmm0
-	mov	$16, %rcx	/* index for loads */
-	mov	$12, %r9d	/* byte position left over from less32bytes case */
-	/*
-	 * Setup %r10 value allows us to detect crossing a page boundary.
-	 * When %r10 goes positive we have crossed a page boundary and
-	 * need to do a nibble.
-	 */
-	lea	12(%rdi), %r10
-	and	$0xfff, %r10	/* offset into 4K page */
-	sub	$0x1000, %r10	/* subtract 4K pagesize */
-
-	.p2align 4
-LABEL(loop_ashr_12):
-	add	$16, %r10
-	jg	LABEL(nibble_ashr_12)
-
-LABEL(gobble_ashr_12):
-	movdqa	(%rsi, %rcx), %xmm1
-	movdqa	(%rdi, %rcx), %xmm2
-	movdqa	%xmm2, %xmm4
-
-#ifndef USE_SSSE3
-	psrldq	$12, %xmm3
-	pslldq	$4, %xmm2
-	por	%xmm3, %xmm2		/* merge into one 16byte value */
-#else
-	palignr	$12, %xmm3, %xmm2	/* merge into one 16byte value */
-#endif
-
-	pcmpeqb	%xmm1, %xmm0
-	pcmpeqb	%xmm2, %xmm1
-	psubb	%xmm0, %xmm1
-	pmovmskb %xmm1, %edx
-	sub	$0xffff, %edx
-	jnz	LABEL(exit)
+        xor     %rax, %r8
+        or      %rbx, %r8
+        sub     %r10, %r8
+        jnz     LABEL(tail)
 
-#ifdef USE_AS_STRNCMP
-	sub	$16, %r11
-	jbe	LABEL(strcmp_exitz)
-#endif
+        xor     %rdx, %r9
+        or      %rbx, %r9
+        sub     %r11, %r9
+        jnz     LABEL(tail)
 
-	add	$16, %rcx
-	movdqa	%xmm4, %xmm3
+        cmp     %rdx, %rax
+        jne     LABEL(tail)
 
-	add	$16, %r10
-	jg	LABEL(nibble_ashr_12)	/* cross page boundary */
-
-	movdqa	(%rsi, %rcx), %xmm1
-	movdqa	(%rdi, %rcx), %xmm2
-	movdqa	%xmm2, %xmm4
-
-#ifndef USE_SSSE3
-	psrldq	$12, %xmm3
-	pslldq	$4, %xmm2
-	por	%xmm3, %xmm2		/* merge into one 16byte value */
-#else
-	palignr	$12, %xmm3, %xmm2	/* merge into one 16byte value */
-#endif
-
-	pcmpeqb	%xmm1, %xmm0
-	pcmpeqb	%xmm2, %xmm1
-	psubb	%xmm0, %xmm1
-	pmovmskb %xmm1, %edx
-	sub	$0xffff, %edx
-	jnz	LABEL(exit)
+        add	$8, %ecx
 
-#ifdef USE_AS_STRNCMP
-	sub	$16, %r11
-	jbe	LABEL(strcmp_exitz)
-#endif
+        jmp	LABEL(64loop)
+
+LABEL(64after):
 
-	add	$16, %rcx
-	movdqa	%xmm4, %xmm3
-	jmp	LABEL(loop_ashr_12)
-
-	.p2align 4
-LABEL(nibble_ashr_12):
-	pcmpeqb	%xmm3, %xmm0		/* check nibble for null char */
-	pmovmskb %xmm0, %edx
-	test	$0xf000, %edx
-	jnz	LABEL(ashr_12_exittail)
+LABEL(tailtry):
+#	mov     (%rsi, %rcx), %rax
+#	mov     (%rdi, %rcx), %rdx
+#	add     $8, %rcx
 
+LABEL(tail):				# byte tail
 #ifdef USE_AS_STRNCMP
-	cmp	$3, %r11
-	jbe	LABEL(ashr_12_exittail)
+	add	$7, %r14
 #endif
 
-	pxor	%xmm0, %xmm0
-	sub	$0x1000, %r10
-	jmp	LABEL(gobble_ashr_12)
-
-	.p2align 4
-LABEL(ashr_12_exittail):
-	movdqa	(%rsi, %rcx), %xmm1
-	psrldq	$12, %xmm0
-	psrldq	$12, %xmm3
-	jmp	LABEL(aftertail)
-
-/*
- *  The following cases will be handled by ashr_13
- *  rcx(offset of rsi)  rax(offset of rdi)        relative offset	 corresponding case
- *        n(3~15)          n - 3      	        12(15 +(n - 3) - n)         ashr_13
- */
-	.p2align 4
-LABEL(ashr_13):
-	pxor	%xmm0, %xmm0
-	movdqa	(%rdi), %xmm2
-	movdqa	(%rsi), %xmm1
-	pcmpeqb	%xmm1, %xmm0
-	pslldq	$3, %xmm2
-	pcmpeqb	%xmm1, %xmm2
-	psubb	%xmm0, %xmm2
-	pmovmskb %xmm2, %r9d
-	shr	%cl, %edx
-	shr	%cl, %r9d
-	sub	%r9d, %edx
-	jnz	LABEL(less32bytes)
-	movdqa	(%rdi), %xmm3
-
-	UPDATE_STRNCMP_COUNTER
-
-	pxor	%xmm0, %xmm0
-	mov	$16, %rcx	/* index for loads */
-	mov	$13, %r9d	/* byte position left over from less32bytes case */
-	/*
-	 * Setup %r10 value allows us to detect crossing a page boundary.
-	 * When %r10 goes positive we have crossed a page boundary and
-	 * need to do a nibble.
-	 */
-	lea	13(%rdi), %r10
-	and	$0xfff, %r10	/* offset into 4K page */
-	sub	$0x1000, %r10	/* subtract 4K pagesize */
-
-	.p2align 4
-LABEL(loop_ashr_13):
-	add	$16, %r10
-	jg	LABEL(nibble_ashr_13)
-
-LABEL(gobble_ashr_13):
-	movdqa	(%rsi, %rcx), %xmm1
-	movdqa	(%rdi, %rcx), %xmm2
-	movdqa	%xmm2, %xmm4
-
-#ifndef USE_SSSE3
-	psrldq	$13, %xmm3
-	pslldq	$3, %xmm2
-	por	%xmm3, %xmm2		/* merge into one 16byte value */
-#else
-	palignr	$13, %xmm3, %xmm2	/* merge into one 16byte value */
-#endif
-
-	pcmpeqb	%xmm1, %xmm0
-	pcmpeqb	%xmm2, %xmm1
-	psubb	%xmm0, %xmm1
-	pmovmskb %xmm1, %edx
-	sub	$0xffff, %edx
-	jnz	LABEL(exit)
+        cmp     %dl, %al		# check if same character
+        jne     .exit
+        test    %al, %al		# check if character a NUL
+        jz      .exit
+
+        shr	$8, %rax
+        shr	$8, %rdx
 
 #ifdef USE_AS_STRNCMP
-	sub	$16, %r11
-	jbe	LABEL(strcmp_exitz)
+	dec	%r14
+	jl	.exit
 #endif
 
-	add	$16, %rcx
-	movdqa	%xmm4, %xmm3
+        cmp     %dl, %al
+        jne     .exit
+        test    %al, %al
+        jz      .exit
 
-	add	$16, %r10
-	jg	LABEL(nibble_ashr_13)	/* cross page boundary */
-
-	movdqa	(%rsi, %rcx), %xmm1
-	movdqa	(%rdi, %rcx), %xmm2
-	movdqa	%xmm2, %xmm4
-
-#ifndef USE_SSSE3
-	psrldq	$13, %xmm3
-	pslldq	$3, %xmm2
-	por	%xmm3, %xmm2		/* merge into one 16byte value */
-#else
-	palignr	$13, %xmm3, %xmm2	/* merge into one 16byte value */
-#endif
-
-	pcmpeqb	%xmm1, %xmm0
-	pcmpeqb	%xmm2, %xmm1
-	psubb	%xmm0, %xmm1
-	pmovmskb %xmm1, %edx
-	sub	$0xffff, %edx
-	jnz	LABEL(exit)
+        shr	$8, %rax
+        shr	$8, %rdx
 
 #ifdef USE_AS_STRNCMP
-	sub	$16, %r11
-	jbe	LABEL(strcmp_exitz)
+	dec	%r14
+	jl	.exit
 #endif
 
-	add	$16, %rcx
-	movdqa	%xmm4, %xmm3
-	jmp	LABEL(loop_ashr_13)
-
-	.p2align 4
-LABEL(nibble_ashr_13):
-	pcmpeqb	%xmm3, %xmm0		/* check nibble for null char */
-	pmovmskb %xmm0, %edx
-	test	$0xe000, %edx
-	jnz	LABEL(ashr_13_exittail)
+        cmp     %dl, %al
+        jne     .exit
+        test    %al, %al
+        jz      .exit
+
+        shr	$8, %rax
+        shr	$8, %rdx
 
 #ifdef USE_AS_STRNCMP
-	cmp	$2, %r11
-	jbe	LABEL(ashr_13_exittail)
+	dec	%r14
+	jl	.exit
 #endif
 
-	pxor	%xmm0, %xmm0
-	sub	$0x1000, %r10
-	jmp	LABEL(gobble_ashr_13)
-
-	.p2align 4
-LABEL(ashr_13_exittail):
-	movdqa	(%rsi, %rcx), %xmm1
-	psrldq  $13, %xmm0
-	psrldq  $13, %xmm3
-	jmp	LABEL(aftertail)
-
-/*
- *  The following cases will be handled by ashr_14
- *  rcx(offset of rsi)  rax(offset of rdi)        relative offset	 corresponding case
- *        n(2~15)          n - 2      	        13(15 +(n - 2) - n)         ashr_14
- */
-	.p2align 4
-LABEL(ashr_14):
-	pxor	%xmm0, %xmm0
-	movdqa	(%rdi), %xmm2
-	movdqa	(%rsi), %xmm1
-	pcmpeqb	%xmm1, %xmm0
-	pslldq  $2, %xmm2
-	pcmpeqb	%xmm1, %xmm2
-	psubb	%xmm0, %xmm2
-	pmovmskb %xmm2, %r9d
-	shr	%cl, %edx
-	shr	%cl, %r9d
-	sub	%r9d, %edx
-	jnz	LABEL(less32bytes)
-	movdqa	(%rdi), %xmm3
-
-	UPDATE_STRNCMP_COUNTER
-
-	pxor	%xmm0, %xmm0
-	mov	$16, %rcx	/* index for loads */
-	mov	$14, %r9d	/* byte position left over from less32bytes case */
-	/*
-	 * Setup %r10 value allows us to detect crossing a page boundary.
-	 * When %r10 goes positive we have crossed a page boundary and
-	 * need to do a nibble.
-	 */
-	lea	14(%rdi), %r10
-	and	$0xfff, %r10	/* offset into 4K page */
-	sub	$0x1000, %r10	/* subtract 4K pagesize */
-
-	.p2align 4
-LABEL(loop_ashr_14):
-	add	$16, %r10
-	jg	LABEL(nibble_ashr_14)
-
-LABEL(gobble_ashr_14):
-	movdqa	(%rsi, %rcx), %xmm1
-	movdqa	(%rdi, %rcx), %xmm2
-	movdqa	%xmm2, %xmm4
-
-#ifndef USE_SSSE3
-	psrldq	$14, %xmm3
-	pslldq	$2, %xmm2
-	por	%xmm3, %xmm2		/* merge into one 16byte value */
-#else
-	palignr	$14, %xmm3, %xmm2	/* merge into one 16byte value */
-#endif
-
-	pcmpeqb	%xmm1, %xmm0
-	pcmpeqb	%xmm2, %xmm1
-	psubb	%xmm0, %xmm1
-	pmovmskb %xmm1, %edx
-	sub	$0xffff, %edx
-	jnz	LABEL(exit)
+        cmp     %dl, %al
+        jne     .exit
+        test    %al, %al
+        jz      .exit
+
+        shr	$8, %rax
+        shr	$8, %rdx
 
 #ifdef USE_AS_STRNCMP
-	sub	$16, %r11
-	jbe	LABEL(strcmp_exitz)
+	dec	%r14
+	jl	.exit
 #endif
 
-	add	$16, %rcx
-	movdqa	%xmm4, %xmm3
+        cmp     %dl, %al
+        jne     .exit
+        test    %al, %al
+        jz      .exit
 
-	add	$16, %r10
-	jg	LABEL(nibble_ashr_14)	/* cross page boundary */
-
-	movdqa	(%rsi, %rcx), %xmm1
-	movdqa	(%rdi, %rcx), %xmm2
-	movdqa	%xmm2, %xmm4
-
-#ifndef USE_SSSE3
-	psrldq	$14, %xmm3
-	pslldq	$2, %xmm2
-	por	%xmm3, %xmm2		/* merge into one 16byte value */
-#else
-	palignr	$14, %xmm3, %xmm2	/* merge into one 16byte value */
-#endif
-
-	pcmpeqb	%xmm1, %xmm0
-	pcmpeqb	%xmm2, %xmm1
-	psubb	%xmm0, %xmm1
-	pmovmskb %xmm1, %edx
-	sub	$0xffff, %edx
-	jnz	LABEL(exit)
+        shr	$8, %eax
+        shr	$8, %edx
 
 #ifdef USE_AS_STRNCMP
-	sub	$16, %r11
-	jbe	LABEL(strcmp_exitz)
+	dec	%r14
+	jl	.exit
 #endif
 
-	add	$16, %rcx
-	movdqa	%xmm4, %xmm3
-	jmp	LABEL(loop_ashr_14)
-
-	.p2align 4
-LABEL(nibble_ashr_14):
-	pcmpeqb	%xmm3, %xmm0		/* check nibble for null char */
-	pmovmskb %xmm0, %edx
-	test	$0xc000, %edx
-	jnz	LABEL(ashr_14_exittail)
+        cmp     %dl, %al
+        jne     .exit
+        test    %al, %al
+        jz      .exit
+
+        shr	$8, %eax
+        shr	$8, %edx
 
 #ifdef USE_AS_STRNCMP
-	cmp	$1, %r11
-	jbe	LABEL(ashr_14_exittail)
+	dec	%r14
+	jl	.exit
 #endif
 
-	pxor	%xmm0, %xmm0
-	sub	$0x1000, %r10
-	jmp	LABEL(gobble_ashr_14)
-
-	.p2align 4
-LABEL(ashr_14_exittail):
-	movdqa	(%rsi, %rcx), %xmm1
-	psrldq	$14, %xmm0
-	psrldq	$14, %xmm3
-	jmp	LABEL(aftertail)
-
-/*
- *  The following cases will be handled by ashr_15
- *  rcx(offset of rsi)  rax(offset of rdi)        relative offset	 corresponding case
- *        n(1~15)          n - 1      	        14(15 +(n - 1) - n)         ashr_15
- */
-	.p2align 4
-LABEL(ashr_15):
-	pxor	%xmm0, %xmm0
-	movdqa	(%rdi), %xmm2
-	movdqa	(%rsi), %xmm1
-	pcmpeqb	%xmm1, %xmm0
-	pslldq	$1, %xmm2
-	pcmpeqb	%xmm1, %xmm2
-	psubb	%xmm0, %xmm2
-	pmovmskb %xmm2, %r9d
-	shr	%cl, %edx
-	shr	%cl, %r9d
-	sub	%r9d, %edx
-	jnz	LABEL(less32bytes)
-
-	movdqa	(%rdi), %xmm3
-
-	UPDATE_STRNCMP_COUNTER
-
-	pxor	%xmm0, %xmm0
-	mov	$16, %rcx	/* index for loads */
-	mov	$15, %r9d	/* byte position left over from less32bytes case */
-	/*
-	 * Setup %r10 value allows us to detect crossing a page boundary.
-	 * When %r10 goes positive we have crossed a page boundary and
-	 * need to do a nibble.
-	 */
-	lea	15(%rdi), %r10
-	and	$0xfff, %r10	/* offset into 4K page */
-
-	sub	$0x1000, %r10	/* subtract 4K pagesize */
-
-	.p2align 4
-LABEL(loop_ashr_15):
-	add	$16, %r10
-	jg	LABEL(nibble_ashr_15)
-
-LABEL(gobble_ashr_15):
-	movdqa	(%rsi, %rcx), %xmm1
-	movdqa	(%rdi, %rcx), %xmm2
-	movdqa	%xmm2, %xmm4
-
-#ifndef USE_SSSE3
-	psrldq	$15, %xmm3
-	pslldq	$1, %xmm2
-	por	%xmm3, %xmm2		/* merge into one 16byte value */
-#else
-	palignr	$15, %xmm3, %xmm2	/* merge into one 16byte value */
-#endif
-
-	pcmpeqb	%xmm1, %xmm0
-	pcmpeqb	%xmm2, %xmm1
-	psubb	%xmm0, %xmm1
-	pmovmskb %xmm1, %edx
-	sub	$0xffff, %edx
-	jnz	LABEL(exit)
+        cmp     %dl, %al
+        jne     .exit
+        test    %al, %al
+        jz      .exit
+
+        shr	$8, %eax
+        shr	$8, %edx
 
 #ifdef USE_AS_STRNCMP
-	sub	$16, %r11
-	jbe	LABEL(strcmp_exitz)
+	dec	%r14
+	jl	.exit
 #endif
 
-	add	$16, %rcx
-	movdqa	%xmm4, %xmm3
+        cmp     %dl, %al
+        jne     .exit
+#	test    %al, %al
+#	jz      .exit
 
-	add	$16, %r10
-	jg	LABEL(nibble_ashr_15)	/* cross page boundary */
-
-	movdqa	(%rsi, %rcx), %xmm1
-	movdqa	(%rdi, %rcx), %xmm2
-	movdqa	%xmm2, %xmm4
-
-#ifndef USE_SSSE3
-	psrldq	$15, %xmm3
-	pslldq	$1, %xmm2
-	por	%xmm3, %xmm2		/* merge into one 16byte value */
-#else
-	palignr	$15, %xmm3, %xmm2	/* merge into one 16byte value */
-#endif
-
-	pcmpeqb	%xmm1, %xmm0
-	pcmpeqb	%xmm2, %xmm1
-	psubb	%xmm0, %xmm1
-	pmovmskb %xmm1, %edx
-	sub	$0xffff, %edx
-	jnz	LABEL(exit)
+        .p2align 4,, 15
 
-#ifdef USE_AS_STRNCMP
-	sub	$16, %r11
-	jbe	LABEL(strcmp_exitz)
-#endif
+LABEL(tailafter):
 
-	add	$16, %rcx
-	movdqa	%xmm4, %xmm3
-	jmp	LABEL(loop_ashr_15)
-
-	.p2align 4
-LABEL(nibble_ashr_15):
-	pcmpeqb	%xmm3, %xmm0		/* check nibble for null char */
-	pmovmskb %xmm0, %edx
-	test	$0x8000, %edx
-	jnz	LABEL(ashr_15_exittail)
+.exit:
+	mov	-32 (%rsp), %r15
+	mov	-24 (%rsp), %rbp
+        mov	-16 (%rsp), %rbx
 
+        .p2align 4,, 3
+
+LABEL(exitafter):
 #ifdef USE_AS_STRNCMP
-	test	%r11, %r11
-	je	LABEL(ashr_15_exittail)
+	test	%r14, %r14
+	cmovl	%edx, %eax
 #endif
 
-	pxor	%xmm0, %xmm0
-	sub	$0x1000, %r10
-	jmp	LABEL(gobble_ashr_15)
-
-	.p2align 4
-LABEL(ashr_15_exittail):
-	movdqa	(%rsi, %rcx), %xmm1
-	psrldq	$15, %xmm3
-	psrldq	$15, %xmm0
-
-	.p2align 4
-LABEL(aftertail):
-	pcmpeqb	%xmm3, %xmm1
-	psubb	%xmm0, %xmm1
-	pmovmskb %xmm1, %edx
-	not	%edx
-
-	.p2align 4
-LABEL(exit):
-	lea	-16(%r9, %rcx), %rax	/* locate the exact offset for rdi */
-LABEL(less32bytes):
-	lea	(%rdi, %rax), %rdi	/* locate the exact address for first operand(rdi) */
-	lea	(%rsi, %rcx), %rsi	/* locate the exact address for second operand(rsi) */
-	test	%r8d, %r8d
-	jz	LABEL(ret)
-	xchg	%rsi, %rdi		/* recover original order according to flag(%r8d) */
-
-	.p2align 4
-LABEL(ret):
-LABEL(less16bytes):
-	bsf	%rdx, %rdx		/* find and store bit index in %rdx */
+	movzx	%al, %eax
+	movzx	%dl, %edx
+	sub	%eax, %edx
+	xchg	%edx, %eax
 
 #ifdef USE_AS_STRNCMP
-	sub	%rdx, %r11
-	jbe	LABEL(strcmp_exitz)
+LABEL(exitz):
+	mov	-8 (%rsp), %r14
 #endif
-	movzbl	(%rsi, %rdx), %ecx
-	movzbl	(%rdi, %rdx), %eax
-
-	sub	%ecx, %eax
-	ret
+        ret
 
-LABEL(strcmp_exitz):
-	xor	%eax, %eax
-	ret
-
-	.p2align 4
-LABEL(Byte0):
-	movzx	(%rsi), %ecx
-	movzx	(%rdi), %eax
-
-	sub	%ecx, %eax
-	ret
-END (BP_SYM (STRCMP))
-
-	.section .rodata,"a",@progbits
-	.p2align 3
-LABEL(unaligned_table):
-	.int	LABEL(ashr_1) - LABEL(unaligned_table)
-	.int	LABEL(ashr_2) - LABEL(unaligned_table)
-	.int	LABEL(ashr_3) - LABEL(unaligned_table)
-	.int	LABEL(ashr_4) - LABEL(unaligned_table)
-	.int	LABEL(ashr_5) - LABEL(unaligned_table)
-	.int	LABEL(ashr_6) - LABEL(unaligned_table)
-	.int	LABEL(ashr_7) - LABEL(unaligned_table)
-	.int	LABEL(ashr_8) - LABEL(unaligned_table)
-	.int	LABEL(ashr_9) - LABEL(unaligned_table)
-	.int	LABEL(ashr_10) - LABEL(unaligned_table)
-	.int	LABEL(ashr_11) - LABEL(unaligned_table)
-	.int	LABEL(ashr_12) - LABEL(unaligned_table)
-	.int	LABEL(ashr_13) - LABEL(unaligned_table)
-	.int	LABEL(ashr_14) - LABEL(unaligned_table)
-	.int	LABEL(ashr_15) - LABEL(unaligned_table)
-	.int	LABEL(ashr_0) - LABEL(unaligned_table)
-#endif /* NOT_IN_libc */
+END     (strcmp)
 libc_hidden_builtin_def (STRCMP)
Index: sysdeps/x86_64/memcpy.S
===================================================================
--- sysdeps/x86_64/memcpy.S.orig
+++ sysdeps/x86_64/memcpy.S
@@ -39,7 +39,7 @@
 
         .text
 
-#if defined PIC && !defined NOT_IN_libc
+#if defined PIC && !defined NOT_IN_libc && !defined USE_AS_BCOPY
 ENTRY (__memcpy_chk)
 
 	cmpq	%rdx, %rcx

Places

File glibc-2.3.3-amd64-string.diff of Package glibc (Revision 2d57cbd995c493f4c0538b15e2473693)

Places