From d9a4d2ab278ab50637e383b6174e9ec42db84327 Mon Sep 17 00:00:00 2001
From: Ulrich Drepper <drepper@gmail.com>
Date: Wed, 19 Oct 2011 12:42:38 -0400
Subject: [PATCH] Add optimized str{,n}casecmp for AVX on x86-64

---
 ChangeLog                               |    8 +
 NEWS                                    |    8 +-
 sysdeps/x86_64/multiarch/init-arch.h    |    4 +-
 sysdeps/x86_64/multiarch/strcmp-sse42.S | 1836 +++++++++++++++++++++++++++++++
 sysdeps/x86_64/multiarch/strcmp.S       | 1828 +-----------------------------
 5 files changed, 1885 insertions(+), 1799 deletions(-)
 create mode 100644 sysdeps/x86_64/multiarch/strcmp-sse42.S

diff --git a/ChangeLog b/ChangeLog
index 707c285..bc8d4ca 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,11 @@
+2011-10-19  Ulrich Drepper  <drepper@gmail.com>
+
+	* sysdeps/x86_64/multiarch/init-arch.h: Define bit_AVX and index_AVX.
+	* sysdeps/x86_64/multiarch/strcmp-sse42.S: New file.  Split out from...
+	* sysdeps/x86_64/multiarch/strcmp.S: ...here.  Include strcmp-sse42.S
+	when compiling str{,n}casecmp and when AVX is available.  Hook up
+	new optimized code in initializers.
+
 2011-10-19  Andreas Schwab  <schwab@redhat.com>
 
 	* sysdeps/x86_64/fpu/math_private.h (libc_feupdateenv): Use
diff --git a/NEWS b/NEWS
index cdb2973..a4b59f1 100644
--- a/NEWS
+++ b/NEWS
@@ -1,4 +1,4 @@
-GNU C Library NEWS -- history of user-visible changes.  2011-10-15
+GNU C Library NEWS -- history of user-visible changes.  2011-10-19
 Copyright (C) 1992-2009, 2010, 2011 Free Software Foundation, Inc.
 See the end for copying conditions.
 
@@ -47,6 +47,12 @@ Version 2.15
 
 * Integrate libm with gcc's -ffinite-math-only option.
   Implemented by Ulrich Drepper.
+
+* Lots of generic, 64-bit, and x86-64-specific performance optimizations
+  to math functions.  Implemented by Ulrich Drepper.
+
+* Optimized strcasecmp and strncasecmp for AVX on x86-64.
+  Implemented by Ulrich Drepper.
 
 Version 2.14
 
diff --git a/sysdeps/x86_64/multiarch/init-arch.h b/sysdeps/x86_64/multiarch/init-arch.h
index 6cfdbdd..e8d48c2 100644
--- a/sysdeps/x86_64/multiarch/init-arch.h
+++ b/sysdeps/x86_64/multiarch/init-arch.h
@@ -1,5 +1,5 @@
 /* This file is part of the GNU C Library.
-   Copyright (C) 2008, 2009, 2010 Free Software Foundation, Inc.
+   Copyright (C) 2008, 2009, 2010, 2011 Free Software Foundation, Inc.
 
    The GNU C Library is free software; you can redistribute it and/or
    modify it under the terms of the GNU Lesser General Public
@@ -31,11 +31,13 @@
 # define bit_SSSE3	(1 << 9)
 # define bit_SSE4_1	(1 << 19)
 # define bit_SSE4_2	(1 << 20)
+# define bit_AVX	(1 << 28)
 
 # define index_SSE2	COMMON_CPUID_INDEX_1*CPUID_SIZE+CPUID_EDX_OFFSET
 # define index_SSSE3	COMMON_CPUID_INDEX_1*CPUID_SIZE+CPUID_ECX_OFFSET
 # define index_SSE4_1	COMMON_CPUID_INDEX_1*CPUID_SIZE+CPUID_ECX_OFFSET
 # define index_SSE4_2	COMMON_CPUID_INDEX_1*CPUID_SIZE+CPUID_ECX_OFFSET
+# define index_AVX	COMMON_CPUID_INDEX_1*CPUID_SIZE+CPUID_ECX_OFFSET
 
 # define index_Fast_Rep_String		FEATURE_INDEX_1*FEATURE_SIZE
 # define index_Fast_Copy_Backward	FEATURE_INDEX_1*FEATURE_SIZE
diff --git a/sysdeps/x86_64/multiarch/strcmp-sse42.S b/sysdeps/x86_64/multiarch/strcmp-sse42.S
new file mode 100644
index 0000000..c9e03b9
--- /dev/null
+++ b/sysdeps/x86_64/multiarch/strcmp-sse42.S
@@ -0,0 +1,1836 @@
+/* strcmp with SSE4.2
+   Copyright (C) 2009, 2010, 2011 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.  */
+
+
+/* We use 0x1a:
+	_SIDD_SBYTE_OPS
+	| _SIDD_CMP_EQUAL_EACH
+	| _SIDD_NEGATIVE_POLARITY
+	| _SIDD_LEAST_SIGNIFICANT
+   on pcmpistri to find out if two 16byte data elements are the same
+   and the offset of the first different byte.  There are 4 cases:
+
+   1. Both 16byte data elements are valid and identical.
+   2. Both 16byte data elements have EOS and identical.
+   3. Both 16byte data elements are valid and they differ at offset X.
+   4. At least one 16byte data element has EOS at offset X.  Two 16byte
+      data elements must differ at or before offset X.
+
+   Here is the table of ECX, CFlag, ZFlag and SFlag for 4 cases:
+
+   case		ECX	CFlag	ZFlag	SFlag
+    1		16	  0	  0	  0
+    2		16	  0	  1	  1
+    3		 X	  1	  0	  0
+    4	       0 <= X	  1	 0/1	 0/1
+
+   We exit from the loop for cases 2, 3 and 4 with jbe which branches
+   when either CFlag or ZFlag is 1.  If CFlag == 0, we return 0 for
+   case 2.  */
+
+	/* Put all SSE 4.2 functions together.  */
+	.section .text.SECTION,"ax",@progbits
+	.align	16
+	.type	STRCMP_SSE42, @function
+#ifdef USE_AS_STRCASECMP_L
+ENTRY (GLABEL(__strcasecmp))
+	movq	__libc_tsd_LOCALE@gottpoff(%rip),%rax
+	movq	%fs:(%rax),%rdx
+
+	// XXX 5 byte should be before the function
+	/* 5-byte NOP.  */
+	.byte	0x0f,0x1f,0x44,0x00,0x00
+END (GLABEL(__strcasecmp))
+	/* FALLTHROUGH to strcasecmp_l.  */
+#endif
+#ifdef USE_AS_STRNCASECMP_L
+ENTRY (GLABEL(__strncasecmp))
+	movq	__libc_tsd_LOCALE@gottpoff(%rip),%rax
+	movq	%fs:(%rax),%rcx
+
+	// XXX 5 byte should be before the function
+	/* 5-byte NOP.  */
+	.byte	0x0f,0x1f,0x44,0x00,0x00
+END (GLABEL(__strncasecmp))
+	/* FALLTHROUGH to strncasecmp_l.  */
+#endif
+
+STRCMP_SSE42:
+	cfi_startproc
+	CALL_MCOUNT
+
+/*
+ * This implementation uses SSE to compare up to 16 bytes at a time.
+ */
+#ifdef USE_AS_STRCASECMP_L
+	/* We have to fall back on the C implementation for locales
+	   with encodings not matching ASCII for single bytes.  */
+# if LOCALE_T___LOCALES != 0 || LC_CTYPE != 0
+	movq	LOCALE_T___LOCALES+LC_CTYPE*8(%rdx), %rax
+# else
+	movq	(%rdx), %rax
+# endif
+	testl	$0, LOCALE_DATA_VALUES+_NL_CTYPE_NONASCII_CASE*SIZEOF_VALUES(%rax)
+	jne	__strcasecmp_l_nonascii
+#endif
+#ifdef USE_AS_STRNCASECMP_L
+	/* We have to fall back on the C implementation for locales
+	   with encodings not matching ASCII for single bytes.  */
+# if LOCALE_T___LOCALES != 0 || LC_CTYPE != 0
+	movq	LOCALE_T___LOCALES+LC_CTYPE*8(%rcx), %rax
+# else
+	movq	(%rcx), %rax
+# endif
+	testl	$0, LOCALE_DATA_VALUES+_NL_CTYPE_NONASCII_CASE*SIZEOF_VALUES(%rax)
+	jne	__strncasecmp_l_nonascii
+#endif
+
+#if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L
+	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 */
+#if defined USE_AS_STRCASECMP_L || defined USE_AS_STRNCASECMP_L
+	.section .rodata.cst16,"aM",@progbits,16
+	.align 16
+LABEL(belowupper):
+	.quad	0x4040404040404040
+	.quad	0x4040404040404040
+LABEL(topupper):
+# ifdef USE_AVX
+	.quad	0x5a5a5a5a5a5a5a5a
+	.quad	0x5a5a5a5a5a5a5a5a
+# else
+	.quad	0x5b5b5b5b5b5b5b5b
+	.quad	0x5b5b5b5b5b5b5b5b
+# endif
+LABEL(touppermask):
+	.quad	0x2020202020202020
+	.quad	0x2020202020202020
+	.previous
+	movdqa	LABEL(belowupper)(%rip), %xmm4
+# define UCLOW_reg %xmm4
+	movdqa	LABEL(topupper)(%rip), %xmm5
+# define UCHIGH_reg %xmm5
+	movdqa	LABEL(touppermask)(%rip), %xmm6
+# define LCQWORD_reg %xmm6
+#endif
+	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 */
+	movdqu	(%rdi), %xmm1
+	movdqu	(%rsi), %xmm2
+#if defined USE_AS_STRCASECMP_L || defined USE_AS_STRNCASECMP_L
+# ifdef USE_AVX
+#  define TOLOWER(reg1, reg2) \
+	vpcmpgtb UCLOW_reg, reg1, %xmm7;			\
+	vpcmpgtb UCHIGH_reg, reg1, %xmm8;			\
+	vpcmpgtb UCLOW_reg, reg2, %xmm9;			\
+	vpcmpgtb UCHIGH_reg, reg2, %xmm10;			\
+	vpandn	%xmm7, %xmm8, %xmm8;					\
+	vpandn	%xmm9, %xmm10, %xmm10;					\
+	vpand	LCQWORD_reg, %xmm8, %xmm8;				\
+	vpand	LCQWORD_reg, %xmm10, %xmm10;				\
+	vpor	reg1, %xmm8, reg1;					\
+	vpor	reg2, %xmm10, reg2
+# else
+#  define TOLOWER(reg1, reg2) \
+	movdqa	reg1, %xmm7;					\
+	movdqa	UCHIGH_reg, %xmm8;				\
+	movdqa	reg2, %xmm9;					\
+	movdqa	UCHIGH_reg, %xmm10;				\
+	pcmpgtb	UCLOW_reg, %xmm7;				\
+	pcmpgtb	reg1, %xmm8;					\
+	pcmpgtb	UCLOW_reg, %xmm9;				\
+	pcmpgtb	reg2, %xmm10;					\
+	pand	%xmm8, %xmm7;					\
+	pand	%xmm10, %xmm9;					\
+	pand	LCQWORD_reg, %xmm7;				\
+	pand	LCQWORD_reg, %xmm9;				\
+	por	%xmm7, reg1;					\
+	por	%xmm9, reg2
+# endif
+	TOLOWER (%xmm1, %xmm2)
+#else
+# define TOLOWER(reg1, reg2)
+#endif
+	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 */
+#if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L
+	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 */
+
+	/*
+	 * 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? */
+#if !defined USE_AS_STRCASECMP_L && !defined USE_AS_STRNCASECMP_L
+	pcmpeqb	(%rdi), %xmm1		/* compare 16 bytes for equality */
+#else
+	movdqa	(%rdi), %xmm2
+	TOLOWER (%xmm1, %xmm2)
+	pcmpeqb	%xmm2, %xmm1		/* compare 16 bytes for equality */
+#endif
+	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.
+	 */
+	mov	%rcx, %rdx	/* only for offset of sse4 instruction loop*/
+	.p2align 4
+LABEL(ashr_0_use):
+	movdqa	(%rdi,%rdx), %xmm0
+#if !defined USE_AS_STRCASECMP_L && !defined USE_AS_STRNCASECMP_L
+	pcmpistri      $0x1a,(%rsi,%rdx), %xmm0
+#else
+	movdqa	(%rsi,%rdx), %xmm1
+	TOLOWER (%xmm0, %xmm1)
+	pcmpistri $0x1a, %xmm1, %xmm0
+#endif
+	lea	16(%rdx), %rdx
+	jbe	LABEL(ashr_0_exit_use)
+#if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L
+	sub	$16, %r11
+	jbe	LABEL(strcmp_exitz)
+#endif
+
+	movdqa	(%rdi,%rdx), %xmm0
+#if !defined USE_AS_STRCASECMP_L && !defined USE_AS_STRNCASECMP_L
+	pcmpistri      $0x1a,(%rsi,%rdx), %xmm0
+#else
+	movdqa	(%rsi,%rdx), %xmm1
+	TOLOWER (%xmm0, %xmm1)
+	pcmpistri $0x1a, %xmm1, %xmm0
+#endif
+	lea	16(%rdx), %rdx
+	jbe	LABEL(ashr_0_exit_use)
+#if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L
+	sub	$16, %r11
+	jbe	LABEL(strcmp_exitz)
+#endif
+	jmp	LABEL(ashr_0_use)
+
+
+	.p2align 4
+LABEL(ashr_0_exit_use):
+	jnc	LABEL(strcmp_exitz)
+#if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L
+	sub	%rcx, %r11
+	jbe	LABEL(strcmp_exitz)
+#endif
+	lea	-16(%rdx, %rcx), %rcx
+	movzbl	(%rdi, %rcx), %eax
+	movzbl	(%rsi, %rcx), %edx
+#if defined USE_AS_STRCASECMP_L || defined USE_AS_STRNCASECMP_L
+	leaq	_nl_C_LC_CTYPE_tolower+128*4(%rip), %rcx
+	movl	(%rcx,%rax,4), %eax
+	movl	(%rcx,%rdx,4), %edx
+#endif
+	sub	%edx, %eax
+	ret
+
+
+
+/*
+ * 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 */
+	TOLOWER (%xmm1, %xmm2)
+	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 */
+	mov	%rcx, %rdx	/* only for offset of sse4 instruction loop*/
+
+	.p2align 4
+LABEL(loop_ashr_1_use):
+	add	$16, %r10
+	jg	LABEL(nibble_ashr_1_use)
+
+LABEL(nibble_ashr_1_restart_use):
+	movdqa	(%rdi, %rdx), %xmm0
+	palignr $1, -16(%rdi, %rdx), %xmm0
+#if !defined USE_AS_STRCASECMP_L && !defined USE_AS_STRNCASECMP_L
+	pcmpistri	$0x1a,(%rsi,%rdx), %xmm0
+#else
+	movdqa	(%rsi,%rdx), %xmm1
+	TOLOWER (%xmm0, %xmm1)
+	pcmpistri $0x1a, %xmm1, %xmm0
+#endif
+	jbe	LABEL(exit_use)
+#if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L
+	sub	$16, %r11
+	jbe	LABEL(strcmp_exitz)
+#endif
+
+	add	$16, %rdx
+	add	$16, %r10
+	jg	LABEL(nibble_ashr_1_use)
+
+	movdqa	(%rdi, %rdx), %xmm0
+	palignr $1, -16(%rdi, %rdx), %xmm0
+#if !defined USE_AS_STRCASECMP_L && !defined USE_AS_STRNCASECMP_L
+	pcmpistri	$0x1a,(%rsi,%rdx), %xmm0
+#else
+	movdqa	(%rsi,%rdx), %xmm1
+	TOLOWER (%xmm0, %xmm1)
+	pcmpistri $0x1a, %xmm1, %xmm0
+#endif
+	jbe	LABEL(exit_use)
+#if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L
+	sub	$16, %r11
+	jbe	LABEL(strcmp_exitz)
+#endif
+	add	$16, %rdx
+	jmp	LABEL(loop_ashr_1_use)
+
+	.p2align 4
+LABEL(nibble_ashr_1_use):
+	sub	$0x1000, %r10
+	movdqa	-16(%rdi, %rdx), %xmm0
+	psrldq	$1, %xmm0
+	pcmpistri      $0x3a,%xmm0, %xmm0
+#if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L
+	cmp	%r11, %rcx
+	jae	LABEL(nibble_ashr_exit_use)
+#endif
+	cmp	$14, %ecx
+	ja	LABEL(nibble_ashr_1_restart_use)
+
+	jmp	LABEL(nibble_ashr_exit_use)
+
+/*
+ * 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
+	TOLOWER (%xmm1, %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 */
+	mov	%rcx, %rdx	/* only for offset of sse4 instruction loop*/
+
+	.p2align 4
+LABEL(loop_ashr_2_use):
+	add	$16, %r10
+	jg	LABEL(nibble_ashr_2_use)
+
+LABEL(nibble_ashr_2_restart_use):
+	movdqa	(%rdi, %rdx), %xmm0
+	palignr $2, -16(%rdi, %rdx), %xmm0
+#if !defined USE_AS_STRCASECMP_L && !defined USE_AS_STRNCASECMP_L
+	pcmpistri	$0x1a,(%rsi,%rdx), %xmm0
+#else
+	movdqa	(%rsi,%rdx), %xmm1
+	TOLOWER (%xmm0, %xmm1)
+	pcmpistri $0x1a, %xmm1, %xmm0
+#endif
+	jbe	LABEL(exit_use)
+#if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L
+	sub	$16, %r11
+	jbe	LABEL(strcmp_exitz)
+#endif
+
+	add	$16, %rdx
+	add	$16, %r10
+	jg	LABEL(nibble_ashr_2_use)
+
+	movdqa	(%rdi, %rdx), %xmm0
+	palignr $2, -16(%rdi, %rdx), %xmm0
+#if !defined USE_AS_STRCASECMP_L && !defined USE_AS_STRNCASECMP_L
+	pcmpistri	$0x1a,(%rsi,%rdx), %xmm0
+#else
+	movdqa	(%rsi,%rdx), %xmm1
+	TOLOWER (%xmm0, %xmm1)
+	pcmpistri $0x1a, %xmm1, %xmm0
+#endif
+	jbe	LABEL(exit_use)
+#if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L
+	sub	$16, %r11
+	jbe	LABEL(strcmp_exitz)
+#endif
+	add	$16, %rdx
+	jmp	LABEL(loop_ashr_2_use)
+
+	.p2align 4
+LABEL(nibble_ashr_2_use):
+	sub	$0x1000, %r10
+	movdqa	-16(%rdi, %rdx), %xmm0
+	psrldq	$2, %xmm0
+	pcmpistri      $0x3a,%xmm0, %xmm0
+#if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L
+	cmp	%r11, %rcx
+	jae	LABEL(nibble_ashr_exit_use)
+#endif
+	cmp	$13, %ecx
+	ja	LABEL(nibble_ashr_2_restart_use)
+
+	jmp	LABEL(nibble_ashr_exit_use)
+
+/*
+ * 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
+	TOLOWER (%xmm1, %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 */
+	mov	%rcx, %rdx	/* only for offset of sse4 instruction loop*/
+
+LABEL(loop_ashr_3_use):
+	add	$16, %r10
+	jg	LABEL(nibble_ashr_3_use)
+
+LABEL(nibble_ashr_3_restart_use):
+	movdqa	(%rdi, %rdx), %xmm0
+	palignr $3, -16(%rdi, %rdx), %xmm0
+#if !defined USE_AS_STRCASECMP_L && !defined USE_AS_STRNCASECMP_L
+	pcmpistri	$0x1a,(%rsi,%rdx), %xmm0
+#else
+	movdqa	(%rsi,%rdx), %xmm1
+	TOLOWER (%xmm0, %xmm1)
+	pcmpistri $0x1a, %xmm1, %xmm0
+#endif
+	jbe	LABEL(exit_use)
+#if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L
+	sub	$16, %r11
+	jbe	LABEL(strcmp_exitz)
+#endif
+
+	add	$16, %rdx
+	add	$16, %r10
+	jg	LABEL(nibble_ashr_3_use)
+
+	movdqa	(%rdi, %rdx), %xmm0
+	palignr $3, -16(%rdi, %rdx), %xmm0
+#if !defined USE_AS_STRCASECMP_L && !defined USE_AS_STRNCASECMP_L
+	pcmpistri	$0x1a,(%rsi,%rdx), %xmm0
+#else
+	movdqa	(%rsi,%rdx), %xmm1
+	TOLOWER (%xmm0, %xmm1)
+	pcmpistri $0x1a, %xmm1, %xmm0
+#endif
+	jbe	LABEL(exit_use)
+#if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L
+	sub	$16, %r11
+	jbe	LABEL(strcmp_exitz)
+#endif
+	add	$16, %rdx
+	jmp	LABEL(loop_ashr_3_use)
+
+	.p2align 4
+LABEL(nibble_ashr_3_use):
+	sub	$0x1000, %r10
+	movdqa	-16(%rdi, %rdx), %xmm0
+	psrldq	$3, %xmm0
+	pcmpistri      $0x3a,%xmm0, %xmm0
+#if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L
+	cmp	%r11, %rcx
+	jae	LABEL(nibble_ashr_exit_use)
+#endif
+	cmp	$12, %ecx
+	ja	LABEL(nibble_ashr_3_restart_use)
+
+	jmp	LABEL(nibble_ashr_exit_use)
+
+/*
+ * 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
+	TOLOWER (%xmm1, %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 */
+	mov	%rcx, %rdx	/* only for offset of sse4 instruction loop*/
+
+	.p2align 4
+LABEL(loop_ashr_4_use):
+	add	$16, %r10
+	jg	LABEL(nibble_ashr_4_use)
+
+LABEL(nibble_ashr_4_restart_use):
+	movdqa	(%rdi, %rdx), %xmm0
+	palignr $4, -16(%rdi, %rdx), %xmm0
+#if !defined USE_AS_STRCASECMP_L && !defined USE_AS_STRNCASECMP_L
+	pcmpistri	$0x1a,(%rsi,%rdx), %xmm0
+#else
+	movdqa	(%rsi,%rdx), %xmm1
+	TOLOWER (%xmm0, %xmm1)
+	pcmpistri $0x1a, %xmm1, %xmm0
+#endif
+	jbe	LABEL(exit_use)
+#if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L
+	sub	$16, %r11
+	jbe	LABEL(strcmp_exitz)
+#endif
+
+	add	$16, %rdx
+	add	$16, %r10
+	jg	LABEL(nibble_ashr_4_use)
+
+	movdqa	(%rdi, %rdx), %xmm0
+	palignr $4, -16(%rdi, %rdx), %xmm0
+#if !defined USE_AS_STRCASECMP_L && !defined USE_AS_STRNCASECMP_L
+	pcmpistri	$0x1a,(%rsi,%rdx), %xmm0
+#else
+	movdqa	(%rsi,%rdx), %xmm1
+	TOLOWER (%xmm0, %xmm1)
+	pcmpistri $0x1a, %xmm1, %xmm0
+#endif
+	jbe	LABEL(exit_use)
+#if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L
+	sub	$16, %r11
+	jbe	LABEL(strcmp_exitz)
+#endif
+	add	$16, %rdx
+	jmp	LABEL(loop_ashr_4_use)
+
+	.p2align 4
+LABEL(nibble_ashr_4_use):
+	sub	$0x1000, %r10
+	movdqa	-16(%rdi, %rdx), %xmm0
+	psrldq	$4, %xmm0
+	pcmpistri      $0x3a,%xmm0, %xmm0
+#if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L
+	cmp	%r11, %rcx
+	jae	LABEL(nibble_ashr_exit_use)
+#endif
+	cmp	$11, %ecx
+	ja	LABEL(nibble_ashr_4_restart_use)
+
+	jmp	LABEL(nibble_ashr_exit_use)
+
+/*
+ * 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
+	TOLOWER (%xmm1, %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 */
+	mov	%rcx, %rdx	/* only for offset of sse4 instruction loop*/
+
+	.p2align 4
+LABEL(loop_ashr_5_use):
+	add	$16, %r10
+	jg	LABEL(nibble_ashr_5_use)
+
+LABEL(nibble_ashr_5_restart_use):
+	movdqa	(%rdi, %rdx), %xmm0
+	palignr $5, -16(%rdi, %rdx), %xmm0
+#if !defined USE_AS_STRCASECMP_L && !defined USE_AS_STRNCASECMP_L
+	pcmpistri	$0x1a,(%rsi,%rdx), %xmm0
+#else
+	movdqa	(%rsi,%rdx), %xmm1
+	TOLOWER (%xmm0, %xmm1)
+	pcmpistri $0x1a, %xmm1, %xmm0
+#endif
+	jbe	LABEL(exit_use)
+#if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L
+	sub	$16, %r11
+	jbe	LABEL(strcmp_exitz)
+#endif
+
+	add	$16, %rdx
+	add	$16, %r10
+	jg	LABEL(nibble_ashr_5_use)
+
+	movdqa	(%rdi, %rdx), %xmm0
+
+	palignr $5, -16(%rdi, %rdx), %xmm0
+#if !defined USE_AS_STRCASECMP_L && !defined USE_AS_STRNCASECMP_L
+	pcmpistri	$0x1a,(%rsi,%rdx), %xmm0
+#else
+	movdqa	(%rsi,%rdx), %xmm1
+	TOLOWER (%xmm0, %xmm1)
+	pcmpistri $0x1a, %xmm1, %xmm0
+#endif
+	jbe	LABEL(exit_use)
+#if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L
+	sub	$16, %r11
+	jbe	LABEL(strcmp_exitz)
+#endif
+	add	$16, %rdx
+	jmp	LABEL(loop_ashr_5_use)
+
+	.p2align 4
+LABEL(nibble_ashr_5_use):
+	sub	$0x1000, %r10
+	movdqa	-16(%rdi, %rdx), %xmm0
+	psrldq	$5, %xmm0
+	pcmpistri      $0x3a,%xmm0, %xmm0
+#if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L
+	cmp	%r11, %rcx
+	jae	LABEL(nibble_ashr_exit_use)
+#endif
+	cmp	$10, %ecx
+	ja	LABEL(nibble_ashr_5_restart_use)
+
+	jmp	LABEL(nibble_ashr_exit_use)
+
+/*
+ * 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
+	TOLOWER (%xmm1, %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 */
+	mov	%rcx, %rdx	/* only for offset of sse4 instruction loop*/
+
+	.p2align 4
+LABEL(loop_ashr_6_use):
+	add	$16, %r10
+	jg	LABEL(nibble_ashr_6_use)
+
+LABEL(nibble_ashr_6_restart_use):
+	movdqa	(%rdi, %rdx), %xmm0
+	palignr $6, -16(%rdi, %rdx), %xmm0
+#if !defined USE_AS_STRCASECMP_L && !defined USE_AS_STRNCASECMP_L
+	pcmpistri $0x1a,(%rsi,%rdx), %xmm0
+#else
+	movdqa	(%rsi,%rdx), %xmm1
+	TOLOWER (%xmm0, %xmm1)
+	pcmpistri $0x1a, %xmm1, %xmm0
+#endif
+	jbe	LABEL(exit_use)
+#if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L
+	sub	$16, %r11
+	jbe	LABEL(strcmp_exitz)
+#endif
+
+	add	$16, %rdx
+	add	$16, %r10
+	jg	LABEL(nibble_ashr_6_use)
+
+	movdqa	(%rdi, %rdx), %xmm0
+	palignr $6, -16(%rdi, %rdx), %xmm0
+#if !defined USE_AS_STRCASECMP_L && !defined USE_AS_STRNCASECMP_L
+	pcmpistri $0x1a,(%rsi,%rdx), %xmm0
+#else
+	movdqa	(%rsi,%rdx), %xmm1
+	TOLOWER (%xmm0, %xmm1)
+	pcmpistri $0x1a, %xmm1, %xmm0
+#endif
+	jbe	LABEL(exit_use)
+#if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L
+	sub	$16, %r11
+	jbe	LABEL(strcmp_exitz)
+#endif
+	add	$16, %rdx
+	jmp	LABEL(loop_ashr_6_use)
+
+	.p2align 4
+LABEL(nibble_ashr_6_use):
+	sub	$0x1000, %r10
+	movdqa	-16(%rdi, %rdx), %xmm0
+	psrldq	$6, %xmm0
+	pcmpistri      $0x3a,%xmm0, %xmm0
+#if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L
+	cmp	%r11, %rcx
+	jae	LABEL(nibble_ashr_exit_use)
+#endif
+	cmp	$9, %ecx
+	ja	LABEL(nibble_ashr_6_restart_use)
+
+	jmp	LABEL(nibble_ashr_exit_use)
+
+/*
+ * 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
+	TOLOWER (%xmm1, %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 */
+	mov	%rcx, %rdx	/* only for offset of sse4 instruction loop*/
+
+	.p2align 4
+LABEL(loop_ashr_7_use):
+	add	$16, %r10
+	jg	LABEL(nibble_ashr_7_use)
+
+LABEL(nibble_ashr_7_restart_use):
+	movdqa	(%rdi, %rdx), %xmm0
+	palignr $7, -16(%rdi, %rdx), %xmm0
+#if !defined USE_AS_STRCASECMP_L && !defined USE_AS_STRNCASECMP_L
+	pcmpistri	$0x1a,(%rsi,%rdx), %xmm0
+#else
+	movdqa	(%rsi,%rdx), %xmm1
+	TOLOWER (%xmm0, %xmm1)
+	pcmpistri $0x1a, %xmm1, %xmm0
+#endif
+	jbe	LABEL(exit_use)
+#if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L
+	sub	$16, %r11
+	jbe	LABEL(strcmp_exitz)
+#endif
+
+	add	$16, %rdx
+	add	$16, %r10
+	jg	LABEL(nibble_ashr_7_use)
+
+	movdqa	(%rdi, %rdx), %xmm0
+	palignr $7, -16(%rdi, %rdx), %xmm0
+#if !defined USE_AS_STRCASECMP_L && !defined USE_AS_STRNCASECMP_L
+	pcmpistri	$0x1a,(%rsi,%rdx), %xmm0
+#else
+	movdqa	(%rsi,%rdx), %xmm1
+	TOLOWER (%xmm0, %xmm1)
+	pcmpistri $0x1a, %xmm1, %xmm0
+#endif
+	jbe	LABEL(exit_use)
+#if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L
+	sub	$16, %r11
+	jbe	LABEL(strcmp_exitz)
+#endif
+	add	$16, %rdx
+	jmp	LABEL(loop_ashr_7_use)
+
+	.p2align 4
+LABEL(nibble_ashr_7_use):
+	sub	$0x1000, %r10
+	movdqa	-16(%rdi, %rdx), %xmm0
+	psrldq	$7, %xmm0
+	pcmpistri      $0x3a,%xmm0, %xmm0
+#if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L
+	cmp	%r11, %rcx
+	jae	LABEL(nibble_ashr_exit_use)
+#endif
+	cmp	$8, %ecx
+	ja	LABEL(nibble_ashr_7_restart_use)
+
+	jmp	LABEL(nibble_ashr_exit_use)
+
+/*
+ *  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
+	TOLOWER (%xmm1, %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 */
+	mov	%rcx, %rdx	/* only for offset of sse4 instruction loop*/
+
+	.p2align 4
+LABEL(loop_ashr_8_use):
+	add	$16, %r10
+	jg	LABEL(nibble_ashr_8_use)
+
+LABEL(nibble_ashr_8_restart_use):
+	movdqa	(%rdi, %rdx), %xmm0
+	palignr $8, -16(%rdi, %rdx), %xmm0
+#if !defined USE_AS_STRCASECMP_L && !defined USE_AS_STRNCASECMP_L
+	pcmpistri $0x1a, (%rsi,%rdx), %xmm0
+#else
+	movdqa	(%rsi,%rdx), %xmm1
+	TOLOWER (%xmm0, %xmm1)
+	pcmpistri $0x1a, %xmm1, %xmm0
+#endif
+	jbe	LABEL(exit_use)
+#if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L
+	sub	$16, %r11
+	jbe	LABEL(strcmp_exitz)
+#endif
+
+	add	$16, %rdx
+	add	$16, %r10
+	jg	LABEL(nibble_ashr_8_use)
+
+	movdqa	(%rdi, %rdx), %xmm0
+	palignr $8, -16(%rdi, %rdx), %xmm0
+#if !defined USE_AS_STRCASECMP_L && !defined USE_AS_STRNCASECMP_L
+	pcmpistri $0x1a, (%rsi,%rdx), %xmm0
+#else
+	movdqa	(%rsi,%rdx), %xmm1
+	TOLOWER (%xmm0, %xmm1)
+	pcmpistri $0x1a, %xmm1, %xmm0
+#endif
+	jbe	LABEL(exit_use)
+#if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L
+	sub	$16, %r11
+	jbe	LABEL(strcmp_exitz)
+#endif
+	add	$16, %rdx
+	jmp	LABEL(loop_ashr_8_use)
+
+	.p2align 4
+LABEL(nibble_ashr_8_use):
+	sub	$0x1000, %r10
+	movdqa	-16(%rdi, %rdx), %xmm0
+	psrldq	$8, %xmm0
+	pcmpistri      $0x3a,%xmm0, %xmm0
+#if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L
+	cmp	%r11, %rcx
+	jae	LABEL(nibble_ashr_exit_use)
+#endif
+	cmp	$7, %ecx
+	ja	LABEL(nibble_ashr_8_restart_use)
+
+	jmp	LABEL(nibble_ashr_exit_use)
+
+/*
+ *  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
+	TOLOWER (%xmm1, %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 */
+	mov	%rcx, %rdx	/* only for offset of sse4 instruction loop*/
+
+	.p2align 4
+LABEL(loop_ashr_9_use):
+	add	$16, %r10
+	jg	LABEL(nibble_ashr_9_use)
+
+LABEL(nibble_ashr_9_restart_use):
+	movdqa	(%rdi, %rdx), %xmm0
+
+	palignr $9, -16(%rdi, %rdx), %xmm0
+#if !defined USE_AS_STRCASECMP_L && !defined USE_AS_STRNCASECMP_L
+	pcmpistri $0x1a, (%rsi,%rdx), %xmm0
+#else
+	movdqa	(%rsi,%rdx), %xmm1
+	TOLOWER (%xmm0, %xmm1)
+	pcmpistri $0x1a, %xmm1, %xmm0
+#endif
+	jbe	LABEL(exit_use)
+#if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L
+	sub	$16, %r11
+	jbe	LABEL(strcmp_exitz)
+#endif
+
+	add	$16, %rdx
+	add	$16, %r10
+	jg	LABEL(nibble_ashr_9_use)
+
+	movdqa	(%rdi, %rdx), %xmm0
+	palignr $9, -16(%rdi, %rdx), %xmm0
+#if !defined USE_AS_STRCASECMP_L && !defined USE_AS_STRNCASECMP_L
+	pcmpistri $0x1a, (%rsi,%rdx), %xmm0
+#else
+	movdqa	(%rsi,%rdx), %xmm1
+	TOLOWER (%xmm0, %xmm1)
+	pcmpistri $0x1a, %xmm1, %xmm0
+#endif
+	jbe	LABEL(exit_use)
+#if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L
+	sub	$16, %r11
+	jbe	LABEL(strcmp_exitz)
+#endif
+	add	$16, %rdx
+	jmp	LABEL(loop_ashr_9_use)
+
+	.p2align 4
+LABEL(nibble_ashr_9_use):
+	sub	$0x1000, %r10
+	movdqa	-16(%rdi, %rdx), %xmm0
+	psrldq	$9, %xmm0
+	pcmpistri      $0x3a,%xmm0, %xmm0
+#if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L
+	cmp	%r11, %rcx
+	jae	LABEL(nibble_ashr_exit_use)
+#endif
+	cmp	$6, %ecx
+	ja	LABEL(nibble_ashr_9_restart_use)
+
+	jmp	LABEL(nibble_ashr_exit_use)
+
+/*
+ *  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
+	TOLOWER (%xmm1, %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 */
+	mov	%rcx, %rdx	/* only for offset of sse4 instruction loop*/
+
+	.p2align 4
+LABEL(loop_ashr_10_use):
+	add	$16, %r10
+	jg	LABEL(nibble_ashr_10_use)
+
+LABEL(nibble_ashr_10_restart_use):
+	movdqa	(%rdi, %rdx), %xmm0
+	palignr $10, -16(%rdi, %rdx), %xmm0
+#if !defined USE_AS_STRCASECMP_L && !defined USE_AS_STRNCASECMP_L
+	pcmpistri $0x1a, (%rsi,%rdx), %xmm0
+#else
+	movdqa	(%rsi,%rdx), %xmm1
+	TOLOWER (%xmm0, %xmm1)
+	pcmpistri $0x1a, %xmm1, %xmm0
+#endif
+	jbe	LABEL(exit_use)
+#if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L
+	sub	$16, %r11
+	jbe	LABEL(strcmp_exitz)
+#endif
+
+	add	$16, %rdx
+	add	$16, %r10
+	jg	LABEL(nibble_ashr_10_use)
+
+	movdqa	(%rdi, %rdx), %xmm0
+	palignr $10, -16(%rdi, %rdx), %xmm0
+#if !defined USE_AS_STRCASECMP_L && !defined USE_AS_STRNCASECMP_L
+	pcmpistri $0x1a, (%rsi,%rdx), %xmm0
+#else
+	movdqa	(%rsi,%rdx), %xmm1
+	TOLOWER (%xmm0, %xmm1)
+	pcmpistri $0x1a, %xmm1, %xmm0
+#endif
+	jbe	LABEL(exit_use)
+#if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L
+	sub	$16, %r11
+	jbe	LABEL(strcmp_exitz)
+#endif
+	add	$16, %rdx
+	jmp	LABEL(loop_ashr_10_use)
+
+	.p2align 4
+LABEL(nibble_ashr_10_use):
+	sub	$0x1000, %r10
+	movdqa	-16(%rdi, %rdx), %xmm0
+	psrldq	$10, %xmm0
+	pcmpistri      $0x3a,%xmm0, %xmm0
+#if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L
+	cmp	%r11, %rcx
+	jae	LABEL(nibble_ashr_exit_use)
+#endif
+	cmp	$5, %ecx
+	ja	LABEL(nibble_ashr_10_restart_use)
+
+	jmp	LABEL(nibble_ashr_exit_use)
+
+/*
+ *  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
+	TOLOWER (%xmm1, %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 */
+	mov	%rcx, %rdx	/* only for offset of sse4 instruction loop*/
+
+	.p2align 4
+LABEL(loop_ashr_11_use):
+	add	$16, %r10
+	jg	LABEL(nibble_ashr_11_use)
+
+LABEL(nibble_ashr_11_restart_use):
+	movdqa	(%rdi, %rdx), %xmm0
+	palignr $11, -16(%rdi, %rdx), %xmm0
+#if !defined USE_AS_STRCASECMP_L && !defined USE_AS_STRNCASECMP_L
+	pcmpistri $0x1a, (%rsi,%rdx), %xmm0
+#else
+	movdqa	(%rsi,%rdx), %xmm1
+	TOLOWER (%xmm0, %xmm1)
+	pcmpistri $0x1a, %xmm1, %xmm0
+#endif
+	jbe	LABEL(exit_use)
+#if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L
+	sub	$16, %r11
+	jbe	LABEL(strcmp_exitz)
+#endif
+
+	add	$16, %rdx
+	add	$16, %r10
+	jg	LABEL(nibble_ashr_11_use)
+
+	movdqa	(%rdi, %rdx), %xmm0
+	palignr $11, -16(%rdi, %rdx), %xmm0
+#if !defined USE_AS_STRCASECMP_L && !defined USE_AS_STRNCASECMP_L
+	pcmpistri $0x1a, (%rsi,%rdx), %xmm0
+#else
+	movdqa	(%rsi,%rdx), %xmm1
+	TOLOWER (%xmm0, %xmm1)
+	pcmpistri $0x1a, %xmm1, %xmm0
+#endif
+	jbe	LABEL(exit_use)
+#if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L
+	sub	$16, %r11
+	jbe	LABEL(strcmp_exitz)
+#endif
+	add	$16, %rdx
+	jmp	LABEL(loop_ashr_11_use)
+
+	.p2align 4
+LABEL(nibble_ashr_11_use):
+	sub	$0x1000, %r10
+	movdqa	-16(%rdi, %rdx), %xmm0
+	psrldq	$11, %xmm0
+	pcmpistri      $0x3a,%xmm0, %xmm0
+#if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L
+	cmp	%r11, %rcx
+	jae	LABEL(nibble_ashr_exit_use)
+#endif
+	cmp	$4, %ecx
+	ja	LABEL(nibble_ashr_11_restart_use)
+
+	jmp	LABEL(nibble_ashr_exit_use)
+
+/*
+ *  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
+	TOLOWER (%xmm1, %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 */
+	mov	%rcx, %rdx	/* only for offset of sse4 instruction loop*/
+
+	.p2align 4
+LABEL(loop_ashr_12_use):
+	add	$16, %r10
+	jg	LABEL(nibble_ashr_12_use)
+
+LABEL(nibble_ashr_12_restart_use):
+	movdqa	(%rdi, %rdx), %xmm0
+	palignr $12, -16(%rdi, %rdx), %xmm0
+#if !defined USE_AS_STRCASECMP_L && !defined USE_AS_STRNCASECMP_L
+	pcmpistri $0x1a, (%rsi,%rdx), %xmm0
+#else
+	movdqa	(%rsi,%rdx), %xmm1
+	TOLOWER (%xmm0, %xmm1)
+	pcmpistri $0x1a, %xmm1, %xmm0
+#endif
+	jbe	LABEL(exit_use)
+#if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L
+	sub	$16, %r11
+	jbe	LABEL(strcmp_exitz)
+#endif
+
+	add	$16, %rdx
+	add	$16, %r10
+	jg	LABEL(nibble_ashr_12_use)
+
+	movdqa	(%rdi, %rdx), %xmm0
+	palignr $12, -16(%rdi, %rdx), %xmm0
+#if !defined USE_AS_STRCASECMP_L && !defined USE_AS_STRNCASECMP_L
+	pcmpistri $0x1a, (%rsi,%rdx), %xmm0
+#else
+	movdqa	(%rsi,%rdx), %xmm1
+	TOLOWER (%xmm0, %xmm1)
+	pcmpistri $0x1a, %xmm1, %xmm0
+#endif
+	jbe	LABEL(exit_use)
+#if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L
+	sub	$16, %r11
+	jbe	LABEL(strcmp_exitz)
+#endif
+	add	$16, %rdx
+	jmp	LABEL(loop_ashr_12_use)
+
+	.p2align 4
+LABEL(nibble_ashr_12_use):
+	sub	$0x1000, %r10
+	movdqa	-16(%rdi, %rdx), %xmm0
+	psrldq	$12, %xmm0
+	pcmpistri      $0x3a,%xmm0, %xmm0
+#if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L
+	cmp	%r11, %rcx
+	jae	LABEL(nibble_ashr_exit_use)
+#endif
+	cmp	$3, %ecx
+	ja	LABEL(nibble_ashr_12_restart_use)
+
+	jmp	LABEL(nibble_ashr_exit_use)
+
+/*
+ *  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
+	TOLOWER (%xmm1, %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 */
+
+	mov	%rcx, %rdx	/* only for offset of sse4 instruction loop*/
+
+	.p2align 4
+LABEL(loop_ashr_13_use):
+	add	$16, %r10
+	jg	LABEL(nibble_ashr_13_use)
+
+LABEL(nibble_ashr_13_restart_use):
+	movdqa	(%rdi, %rdx), %xmm0
+	palignr $13, -16(%rdi, %rdx), %xmm0
+#if !defined USE_AS_STRCASECMP_L && !defined USE_AS_STRNCASECMP_L
+	pcmpistri $0x1a, (%rsi,%rdx), %xmm0
+#else
+	movdqa	(%rsi,%rdx), %xmm1
+	TOLOWER (%xmm0, %xmm1)
+	pcmpistri $0x1a, %xmm1, %xmm0
+#endif
+	jbe	LABEL(exit_use)
+#if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L
+	sub	$16, %r11
+	jbe	LABEL(strcmp_exitz)
+#endif
+
+	add	$16, %rdx
+	add	$16, %r10
+	jg	LABEL(nibble_ashr_13_use)
+
+	movdqa	(%rdi, %rdx), %xmm0
+	palignr $13, -16(%rdi, %rdx), %xmm0
+#if !defined USE_AS_STRCASECMP_L && !defined USE_AS_STRNCASECMP_L
+	pcmpistri $0x1a, (%rsi,%rdx), %xmm0
+#else
+	movdqa	(%rsi,%rdx), %xmm1
+	TOLOWER (%xmm0, %xmm1)
+	pcmpistri $0x1a, %xmm1, %xmm0
+#endif
+	jbe	LABEL(exit_use)
+#if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L
+	sub	$16, %r11
+	jbe	LABEL(strcmp_exitz)
+#endif
+	add	$16, %rdx
+	jmp	LABEL(loop_ashr_13_use)
+
+	.p2align 4
+LABEL(nibble_ashr_13_use):
+	sub	$0x1000, %r10
+	movdqa	-16(%rdi, %rdx), %xmm0
+	psrldq	$13, %xmm0
+	pcmpistri      $0x3a,%xmm0, %xmm0
+#if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L
+	cmp	%r11, %rcx
+	jae	LABEL(nibble_ashr_exit_use)
+#endif
+	cmp	$2, %ecx
+	ja	LABEL(nibble_ashr_13_restart_use)
+
+	jmp	LABEL(nibble_ashr_exit_use)
+
+/*
+ *  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
+	TOLOWER (%xmm1, %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 */
+
+	mov	%rcx, %rdx	/* only for offset of sse4 instruction loop*/
+
+	.p2align 4
+LABEL(loop_ashr_14_use):
+	add	$16, %r10
+	jg	LABEL(nibble_ashr_14_use)
+
+LABEL(nibble_ashr_14_restart_use):
+	movdqa	(%rdi, %rdx), %xmm0
+	palignr $14, -16(%rdi, %rdx), %xmm0
+#if !defined USE_AS_STRCASECMP_L && !defined USE_AS_STRNCASECMP_L
+	pcmpistri $0x1a, (%rsi,%rdx), %xmm0
+#else
+	movdqa	(%rsi,%rdx), %xmm1
+	TOLOWER (%xmm0, %xmm1)
+	pcmpistri $0x1a, %xmm1, %xmm0
+#endif
+	jbe	LABEL(exit_use)
+#if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L
+	sub	$16, %r11
+	jbe	LABEL(strcmp_exitz)
+#endif
+
+	add	$16, %rdx
+	add	$16, %r10
+	jg	LABEL(nibble_ashr_14_use)
+
+	movdqa	(%rdi, %rdx), %xmm0
+	palignr $14, -16(%rdi, %rdx), %xmm0
+#if !defined USE_AS_STRCASECMP_L && !defined USE_AS_STRNCASECMP_L
+	pcmpistri $0x1a, (%rsi,%rdx), %xmm0
+#else
+	movdqa	(%rsi,%rdx), %xmm1
+	TOLOWER (%xmm0, %xmm1)
+	pcmpistri $0x1a, %xmm1, %xmm0
+#endif
+	jbe	LABEL(exit_use)
+#if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L
+	sub	$16, %r11
+	jbe	LABEL(strcmp_exitz)
+#endif
+	add	$16, %rdx
+	jmp	LABEL(loop_ashr_14_use)
+
+	.p2align 4
+LABEL(nibble_ashr_14_use):
+	sub	$0x1000, %r10
+	movdqa	-16(%rdi, %rdx), %xmm0
+	psrldq	$14, %xmm0
+	pcmpistri      $0x3a,%xmm0, %xmm0
+#if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L
+	cmp	%r11, %rcx
+	jae	LABEL(nibble_ashr_exit_use)
+#endif
+	cmp	$1, %ecx
+	ja	LABEL(nibble_ashr_14_restart_use)
+
+	jmp	LABEL(nibble_ashr_exit_use)
+
+/*
+ *  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
+	TOLOWER (%xmm1, %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 */
+
+	mov	%rcx, %rdx	/* only for offset of sse4 instruction loop*/
+
+	.p2align 4
+LABEL(loop_ashr_15_use):
+	add	$16, %r10
+	jg	LABEL(nibble_ashr_15_use)
+
+LABEL(nibble_ashr_15_restart_use):
+	movdqa	(%rdi, %rdx), %xmm0
+	palignr $15, -16(%rdi, %rdx), %xmm0
+#if !defined USE_AS_STRCASECMP_L && !defined USE_AS_STRNCASECMP_L
+	pcmpistri $0x1a, (%rsi,%rdx), %xmm0
+#else
+	movdqa	(%rsi,%rdx), %xmm1
+	TOLOWER (%xmm0, %xmm1)
+	pcmpistri $0x1a, %xmm1, %xmm0
+#endif
+	jbe	LABEL(exit_use)
+#if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L
+	sub	$16, %r11
+	jbe	LABEL(strcmp_exitz)
+#endif
+
+	add	$16, %rdx
+	add	$16, %r10
+	jg	LABEL(nibble_ashr_15_use)
+
+	movdqa	(%rdi, %rdx), %xmm0
+	palignr $15, -16(%rdi, %rdx), %xmm0
+#if !defined USE_AS_STRCASECMP_L && !defined USE_AS_STRNCASECMP_L
+	pcmpistri $0x1a, (%rsi,%rdx), %xmm0
+#else
+	movdqa	(%rsi,%rdx), %xmm1
+	TOLOWER (%xmm0, %xmm1)
+	pcmpistri $0x1a, %xmm1, %xmm0
+#endif
+	jbe	LABEL(exit_use)
+#if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L
+	sub	$16, %r11
+	jbe	LABEL(strcmp_exitz)
+#endif
+	add	$16, %rdx
+	jmp	LABEL(loop_ashr_15_use)
+
+	.p2align 4
+LABEL(nibble_ashr_15_use):
+	sub	$0x1000, %r10
+	movdqa	-16(%rdi, %rdx), %xmm0
+	psrldq	$15, %xmm0
+	pcmpistri      $0x3a,%xmm0, %xmm0
+#if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L
+	cmp	%r11, %rcx
+	jae	LABEL(nibble_ashr_exit_use)
+#endif
+	cmp	$0, %ecx
+	ja	LABEL(nibble_ashr_15_restart_use)
+
+LABEL(nibble_ashr_exit_use):
+#if !defined USE_AS_STRCASECMP_L && !defined USE_AS_STRNCASECMP_L
+	pcmpistri      $0x1a,(%rsi,%rdx), %xmm0
+#else
+	movdqa	(%rsi,%rdx), %xmm1
+	TOLOWER (%xmm0, %xmm1)
+	pcmpistri $0x1a, %xmm1, %xmm0
+#endif
+	.p2align 4
+LABEL(exit_use):
+	jnc	LABEL(strcmp_exitz)
+#if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L
+	sub	%rcx, %r11
+	jbe	LABEL(strcmp_exitz)
+#endif
+	add	%rcx, %rdx
+	lea	-16(%rdi, %r9), %rdi
+	movzbl	(%rdi, %rdx), %eax
+	movzbl	(%rsi, %rdx), %edx
+	test	%r8d, %r8d
+	jz	LABEL(ret_use)
+	xchg	%eax, %edx
+LABEL(ret_use):
+#if defined USE_AS_STRCASECMP_L || defined USE_AS_STRNCASECMP_L
+	leaq	_nl_C_LC_CTYPE_tolower+128*4(%rip), %rcx
+	movl	(%rcx,%rdx,4), %edx
+	movl	(%rcx,%rax,4), %eax
+#endif
+
+	sub	%edx, %eax
+	ret
+
+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 */
+
+#if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L
+	sub	%rdx, %r11
+	jbe	LABEL(strcmp_exitz)
+#endif
+	movzbl	(%rsi, %rdx), %ecx
+	movzbl	(%rdi, %rdx), %eax
+
+#if defined USE_AS_STRCASECMP_L || defined USE_AS_STRNCASECMP_L
+	leaq	_nl_C_LC_CTYPE_tolower+128*4(%rip), %rdx
+	movl	(%rdx,%rcx,4), %ecx
+	movl	(%rdx,%rax,4), %eax
+#endif
+
+	sub	%ecx, %eax
+	ret
+
+LABEL(strcmp_exitz):
+	xor	%eax, %eax
+	ret
+
+	.p2align 4
+	// XXX Same as code above
+LABEL(Byte0):
+	movzx	(%rsi), %ecx
+	movzx	(%rdi), %eax
+
+#if defined USE_AS_STRCASECMP_L || defined USE_AS_STRNCASECMP_L
+	leaq	_nl_C_LC_CTYPE_tolower+128*4(%rip), %rdx
+	movl	(%rdx,%rcx,4), %ecx
+	movl	(%rdx,%rax,4), %eax
+#endif
+
+	sub	%ecx, %eax
+	ret
+	cfi_endproc
+	.size	STRCMP_SSE42, .-STRCMP_SSE42
+
+#undef UCLOW_reg
+#undef UCHIGH_reg
+#undef LCQWORD_reg
+#undef TOLOWER
+
+	/* Put all SSE 4.2 functions together.  */
+	.section .rodata.SECTION,"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)
+
+#undef LABEL
+#undef GLABEL
+#undef SECTION
diff --git a/sysdeps/x86_64/multiarch/strcmp.S b/sysdeps/x86_64/multiarch/strcmp.S
index 8879855..f93c83d 100644
--- a/sysdeps/x86_64/multiarch/strcmp.S
+++ b/sysdeps/x86_64/multiarch/strcmp.S
@@ -1,5 +1,5 @@
 /* strcmp with SSE4.2
-   Copyright (C) 2009, 2010 Free Software Foundation, Inc.
+   Copyright (C) 2009, 2010, 2011 Free Software Foundation, Inc.
    Contributed by Intel Corporation.
    This file is part of the GNU C Library.
 
@@ -28,9 +28,9 @@
 	/* calculate left number to compare */		\
 	lea	-16(%rcx, %r11), %r9;			\
 	cmp	%r9, %r11;				\
-	jb	LABEL(strcmp_exitz_sse4_2);		\
+	jb	LABEL(strcmp_exitz);			\
 	test	%r9, %r9;				\
-	je	LABEL(strcmp_exitz_sse4_2);		\
+	je	LABEL(strcmp_exitz);			\
 	mov	%r9, %r11
 
 # define STRCMP_SSE42	__strncmp_sse42
@@ -42,6 +42,7 @@
 
 # define UPDATE_STRNCMP_COUNTER
 
+# define STRCMP_AVX	__strcasecmp_l_avx
 # define STRCMP_SSE42	__strcasecmp_l_sse42
 # define STRCMP_SSSE3	__strcasecmp_l_ssse3
 # define STRCMP_SSE2	__strcasecmp_l_sse2
@@ -55,11 +56,12 @@
 	/* calculate left number to compare */		\
 	lea	-16(%rcx, %r11), %r9;			\
 	cmp	%r9, %r11;				\
-	jb	LABEL(strcmp_exitz_sse4_2);		\
+	jb	LABEL(strcmp_exitz);			\
 	test	%r9, %r9;				\
-	je	LABEL(strcmp_exitz_sse4_2);		\
+	je	LABEL(strcmp_exitz);			\
 	mov	%r9, %r11
 
+# define STRCMP_AVX	__strncasecmp_l_avx
 # define STRCMP_SSE42	__strncasecmp_l_sse42
 # define STRCMP_SSSE3	__strncasecmp_l_ssse3
 # define STRCMP_SSE2	__strncasecmp_l_sse2
@@ -75,10 +77,6 @@
 # endif
 #endif
 
-#ifndef LABEL
-# define LABEL(l) L(l)
-#endif
-
 /* Define multiple versions only for the definition in libc.  Don't
    define multiple versions for strncmp in static library since we
    need strncmp before the initialization happened.  */
@@ -107,6 +105,11 @@ ENTRY(__strcasecmp)
 	jne	1f
 	call	__init_cpu_features
 1:
+#  ifdef HAVE_AVX_SUPPORT
+	leaq	__strcasecmp_avx(%rip), %rax
+	testl	$bit_AVX, __cpu_features+CPUID_OFFSET+index_AVX(%rip)
+	jnz	2f
+#  endif
 	leaq	__strcasecmp_sse42(%rip), %rax
 	testl	$bit_SSE4_2, __cpu_features+CPUID_OFFSET+index_SSE4_2(%rip)
 	jnz	2f
@@ -125,6 +128,11 @@ ENTRY(__strncasecmp)
 	jne	1f
 	call	__init_cpu_features
 1:
+#  ifdef HAVE_AVX_SUPPORT
+	leaq	__strncasecmp_avx(%rip), %rax
+	testl	$bit_AVX, __cpu_features+CPUID_OFFSET+index_AVX(%rip)
+	jnz	2f
+#  endif
 	leaq	__strncasecmp_sse42(%rip), %rax
 	testl	$bit_SSE4_2, __cpu_features+CPUID_OFFSET+index_SSE4_2(%rip)
 	jnz	2f
@@ -137,1798 +145,24 @@ END(__strncasecmp)
 weak_alias (__strncasecmp, strncasecmp)
 # endif
 
-/* We use 0x1a:
-	_SIDD_SBYTE_OPS
-	| _SIDD_CMP_EQUAL_EACH
-	| _SIDD_NEGATIVE_POLARITY
-	| _SIDD_LEAST_SIGNIFICANT
-   on pcmpistri to find out if two 16byte data elements are the same
-   and the offset of the first different byte.  There are 4 cases:
-
-   1. Both 16byte data elements are valid and identical.
-   2. Both 16byte data elements have EOS and identical.
-   3. Both 16byte data elements are valid and they differ at offset X.
-   4. At least one 16byte data element has EOS at offset X.  Two 16byte
-      data elements must differ at or before offset X.
-
-   Here is the table of ECX, CFlag, ZFlag and SFlag for 4 cases:
-
-   case		ECX	CFlag	ZFlag	SFlag
-    1		16	  0	  0	  0
-    2		16	  0	  1	  1
-    3		 X	  1	  0	  0
-    4	       0 <= X	  1	 0/1	 0/1
-
-   We exit from the loop for cases 2, 3 and 4 with jbe which branches
-   when either CFlag or ZFlag is 1.  If CFlag == 0, we return 0 for
-   case 2.  */
-
-	/* Put all SSE 4.2 functions together.  */
-	.section .text.sse4.2,"ax",@progbits
-	.align	16
-	.type	STRCMP_SSE42, @function
-# ifdef USE_AS_STRCASECMP_L
-ENTRY (__strcasecmp_sse42)
-	movq	__libc_tsd_LOCALE@gottpoff(%rip),%rax
-	movq	%fs:(%rax),%rdx
-
-	// XXX 5 byte should be before the function
-	/* 5-byte NOP.  */
-	.byte	0x0f,0x1f,0x44,0x00,0x00
-END (__strcasecmp_sse42)
-	/* FALLTHROUGH to strcasecmp_l.  */
-# endif
-# ifdef USE_AS_STRNCASECMP_L
-ENTRY (__strncasecmp_sse42)
-	movq	__libc_tsd_LOCALE@gottpoff(%rip),%rax
-	movq	%fs:(%rax),%rcx
-
-	// XXX 5 byte should be before the function
-	/* 5-byte NOP.  */
-	.byte	0x0f,0x1f,0x44,0x00,0x00
-END (__strncasecmp_sse42)
-	/* FALLTHROUGH to strncasecmp_l.  */
-# endif
+# undef LABEL
+# define LABEL(l) .L##l##_sse42
+# define GLABEL(l) l##_sse42
+# define SECTION sse4.2
+# include "strcmp-sse42.S"
 
-STRCMP_SSE42:
-	cfi_startproc
-	CALL_MCOUNT
 
-/*
- * This implementation uses SSE to compare up to 16 bytes at a time.
- */
-# ifdef USE_AS_STRCASECMP_L
-	/* We have to fall back on the C implementation for locales
-	   with encodings not matching ASCII for single bytes.  */
-#  if LOCALE_T___LOCALES != 0 || LC_CTYPE != 0
-	movq	LOCALE_T___LOCALES+LC_CTYPE*8(%rdx), %rax
-#  else
-	movq	(%rdx), %rax
+# ifdef HAVE_AVX_SUPPORT
+#  if defined USE_AS_STRCASECMP_L || defined USE_AS_STRNCASECMP_L
+#   define LABEL(l) .L##l##_avx
+#   define GLABEL(l) l##_avx
+#   define USE_AVX 1
+#   undef STRCMP_SSE42
+#   define STRCMP_SSE42 STRCMP_AVX
+#   define SECTION avx
+#   include "strcmp-sse42.S"
 #  endif
-	testl	$0, LOCALE_DATA_VALUES+_NL_CTYPE_NONASCII_CASE*SIZEOF_VALUES(%rax)
-	jne	__strcasecmp_l_nonascii
-# endif
-# ifdef USE_AS_STRNCASECMP_L
-	/* We have to fall back on the C implementation for locales
-	   with encodings not matching ASCII for single bytes.  */
-#  if LOCALE_T___LOCALES != 0 || LC_CTYPE != 0
-	movq	LOCALE_T___LOCALES+LC_CTYPE*8(%rcx), %rax
-#  else
-	movq	(%rcx), %rax
-#  endif
-	testl	$0, LOCALE_DATA_VALUES+_NL_CTYPE_NONASCII_CASE*SIZEOF_VALUES(%rax)
-	jne	__strncasecmp_l_nonascii
-# endif
-
-# if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L
-	test	%rdx, %rdx
-	je	LABEL(strcmp_exitz_sse4_2)
-	cmp	$1, %rdx
-	je	LABEL(Byte0_sse4_2)
-	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 */
-# if defined USE_AS_STRCASECMP_L || defined USE_AS_STRNCASECMP_L
-	.section .rodata.cst16,"aM",@progbits,16
-	.align 16
-.Lbelowupper_sse4:
-	.quad	0x4040404040404040
-	.quad	0x4040404040404040
-.Ltopupper_sse4:
-	.quad	0x5b5b5b5b5b5b5b5b
-	.quad	0x5b5b5b5b5b5b5b5b
-.Ltouppermask_sse4:
-	.quad	0x2020202020202020
-	.quad	0x2020202020202020
-	.previous
-	movdqa	.Lbelowupper_sse4(%rip), %xmm4
-#  define UCLOW_reg %xmm4
-	movdqa	.Ltopupper_sse4(%rip), %xmm5
-#  define UCHIGH_reg %xmm5
-	movdqa	.Ltouppermask_sse4(%rip), %xmm6
-#  define LCQWORD_reg %xmm6
-# endif
-	cmp	$0x30, %ecx
-	ja	LABEL(crosscache_sse4_2)/* rsi: 16-byte load will cross cache line */
-	cmp	$0x30, %eax
-	ja	LABEL(crosscache_sse4_2)/* rdi: 16-byte load will cross cache line */
-	movdqu	(%rdi), %xmm1
-	movdqu	(%rsi), %xmm2
-# if defined USE_AS_STRCASECMP_L || defined USE_AS_STRNCASECMP_L
-#  define TOLOWER(reg1, reg2) \
-	movdqa	reg1, %xmm7;					\
-	movdqa	UCHIGH_reg, %xmm8;				\
-	movdqa	reg2, %xmm9;					\
-	movdqa	UCHIGH_reg, %xmm10;				\
-	pcmpgtb	UCLOW_reg, %xmm7;				\
-	pcmpgtb	reg1, %xmm8;					\
-	pcmpgtb	UCLOW_reg, %xmm9;				\
-	pcmpgtb	reg2, %xmm10;					\
-	pand	%xmm8, %xmm7;					\
-	pand	%xmm10, %xmm9;					\
-	pand	LCQWORD_reg, %xmm7;				\
-	pand	LCQWORD_reg, %xmm9;				\
-	por	%xmm7, reg1;					\
-	por	%xmm9, reg2
-	TOLOWER (%xmm1, %xmm2)
-# else
-#  define TOLOWER(reg1, reg2)
-# endif
-	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_sse4_2)/* If not, find different value or null char */
-# if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L
-	sub	$16, %r11
-	jbe	LABEL(strcmp_exitz_sse4_2)/* finish comparision */
-# endif
-	add	$16, %rsi		/* prepare to search next 16 bytes */
-	add	$16, %rdi		/* prepare to search next 16 bytes */
-
-	/*
-	 * 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_sse4_2):
-	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_sse4_2)		/* rsi and rdi relative offset same */
-	ja	LABEL(bigger_sse4_2)
-	mov	%edx, %r8d			/* r8d is offset flag for exit tail */
-	xchg	%ecx, %eax
-	xchg	%rsi, %rdi
-LABEL(bigger_sse4_2):
-	lea	15(%rax), %r9
-	sub	%rcx, %r9
-	lea	LABEL(unaligned_table_sse4_2)(%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_sse4_2):
-
-	movdqa	(%rsi), %xmm1
-	pxor	%xmm0, %xmm0			/* clear %xmm0 for null char check */
-	pcmpeqb	%xmm1, %xmm0			/* Any null chars? */
-# if !defined USE_AS_STRCASECMP_L && !defined USE_AS_STRNCASECMP_L
-	pcmpeqb	(%rdi), %xmm1			/* compare 16 bytes for equality */
-# else
-	movdqa	(%rdi), %xmm2
-	TOLOWER (%xmm1, %xmm2)
-	pcmpeqb	%xmm2, %xmm1			/* compare 16 bytes for equality */
-# endif
-	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_sse4_2)	/* 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.
-	 */
-	mov	%rcx, %rdx	/* only for offset of sse4 instruction loop*/
-	.p2align 4
-LABEL(ashr_0_use_sse4_2):
-	movdqa	(%rdi,%rdx), %xmm0
-# if !defined USE_AS_STRCASECMP_L && !defined USE_AS_STRNCASECMP_L
-	pcmpistri      $0x1a,(%rsi,%rdx), %xmm0
-# else
-	movdqa	(%rsi,%rdx), %xmm1
-	TOLOWER (%xmm0, %xmm1)
-	pcmpistri $0x1a, %xmm1, %xmm0
-# endif
-	lea	16(%rdx), %rdx
-	jbe	LABEL(ashr_0_use_sse4_2_exit)
-# if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L
-	sub	$16, %r11
-	jbe	LABEL(strcmp_exitz_sse4_2)
-# endif
-
-	movdqa	(%rdi,%rdx), %xmm0
-# if !defined USE_AS_STRCASECMP_L && !defined USE_AS_STRNCASECMP_L
-	pcmpistri      $0x1a,(%rsi,%rdx), %xmm0
-# else
-	movdqa	(%rsi,%rdx), %xmm1
-	TOLOWER (%xmm0, %xmm1)
-	pcmpistri $0x1a, %xmm1, %xmm0
-# endif
-	lea	16(%rdx), %rdx
-	jbe	LABEL(ashr_0_use_sse4_2_exit)
-# if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L
-	sub	$16, %r11
-	jbe	LABEL(strcmp_exitz_sse4_2)
-# endif
-	jmp	LABEL(ashr_0_use_sse4_2)
-
-
-	.p2align 4
-LABEL(ashr_0_use_sse4_2_exit):
-	jnc	LABEL(strcmp_exitz_sse4_2)
-# if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L
-	sub	%rcx, %r11
-	jbe	LABEL(strcmp_exitz_sse4_2)
-# endif
-	lea	-16(%rdx, %rcx), %rcx
-	movzbl	(%rdi, %rcx), %eax
-	movzbl	(%rsi, %rcx), %edx
-# if defined USE_AS_STRCASECMP_L || defined USE_AS_STRNCASECMP_L
-	leaq	_nl_C_LC_CTYPE_tolower+128*4(%rip), %rcx
-	movl	(%rcx,%rax,4), %eax
-	movl	(%rcx,%rdx,4), %edx
-# endif
-	sub	%edx, %eax
-	ret
-
-
-
-/*
- * 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_sse4_2):
-	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 */
-	TOLOWER (%xmm1, %xmm2)
-	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_sse4_2)/* 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 */
-	mov	%rcx, %rdx	/* only for offset of sse4 instruction loop*/
-
-	.p2align 4
-LABEL(loop_ashr_1_use_sse4_2):
-	add	$16, %r10
-	jg	LABEL(nibble_ashr_1_use_sse4_2)
-
-LABEL(nibble_ashr_1_use_sse4_2_restart):
-	movdqa	(%rdi, %rdx), %xmm0
-	palignr $1, -16(%rdi, %rdx), %xmm0
-# if !defined USE_AS_STRCASECMP_L && !defined USE_AS_STRNCASECMP_L
-	pcmpistri	$0x1a,(%rsi,%rdx), %xmm0
-# else
-	movdqa	(%rsi,%rdx), %xmm1
-	TOLOWER (%xmm0, %xmm1)
-	pcmpistri $0x1a, %xmm1, %xmm0
-# endif
-	jbe	LABEL(use_sse4_2_exit)
-# if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L
-	sub	$16, %r11
-	jbe	LABEL(strcmp_exitz_sse4_2)
-# endif
-
-	add	$16, %rdx
-	add	$16, %r10
-	jg	LABEL(nibble_ashr_1_use_sse4_2)
-
-	movdqa	(%rdi, %rdx), %xmm0
-	palignr $1, -16(%rdi, %rdx), %xmm0
-# if !defined USE_AS_STRCASECMP_L && !defined USE_AS_STRNCASECMP_L
-	pcmpistri	$0x1a,(%rsi,%rdx), %xmm0
-# else
-	movdqa	(%rsi,%rdx), %xmm1
-	TOLOWER (%xmm0, %xmm1)
-	pcmpistri $0x1a, %xmm1, %xmm0
-# endif
-	jbe	LABEL(use_sse4_2_exit)
-# if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L
-	sub	$16, %r11
-	jbe	LABEL(strcmp_exitz_sse4_2)
-# endif
-	add	$16, %rdx
-	jmp	LABEL(loop_ashr_1_use_sse4_2)
-
-	.p2align 4
-LABEL(nibble_ashr_1_use_sse4_2):
-	sub	$0x1000, %r10
-	movdqa	-16(%rdi, %rdx), %xmm0
-	psrldq	$1, %xmm0
-	pcmpistri      $0x3a,%xmm0, %xmm0
-# if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L
-	cmp	%r11, %rcx
-	jae	LABEL(nibble_ashr_use_sse4_2_exit)
-# endif
-	cmp	$14, %ecx
-	ja	LABEL(nibble_ashr_1_use_sse4_2_restart)
-
-	jmp	LABEL(nibble_ashr_use_sse4_2_exit)
-
-/*
- * 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_sse4_2):
-	pxor	%xmm0, %xmm0
-	movdqa	(%rdi), %xmm2
-	movdqa	(%rsi), %xmm1
-	pcmpeqb	%xmm1, %xmm0
-	pslldq	$14, %xmm2
-	TOLOWER (%xmm1, %xmm2)
-	pcmpeqb	%xmm1, %xmm2
-	psubb	%xmm0, %xmm2
-	pmovmskb %xmm2, %r9d
-	shr	%cl, %edx
-	shr	%cl, %r9d
-	sub	%r9d, %edx
-	jnz	LABEL(less32bytes_sse4_2)
-	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 */
-	mov	%rcx, %rdx	/* only for offset of sse4 instruction loop*/
-
-	.p2align 4
-LABEL(loop_ashr_2_use_sse4_2):
-	add	$16, %r10
-	jg	LABEL(nibble_ashr_2_use_sse4_2)
-
-LABEL(nibble_ashr_2_use_sse4_2_restart):
-	movdqa	(%rdi, %rdx), %xmm0
-	palignr $2, -16(%rdi, %rdx), %xmm0
-# if !defined USE_AS_STRCASECMP_L && !defined USE_AS_STRNCASECMP_L
-	pcmpistri	$0x1a,(%rsi,%rdx), %xmm0
-# else
-	movdqa	(%rsi,%rdx), %xmm1
-	TOLOWER (%xmm0, %xmm1)
-	pcmpistri $0x1a, %xmm1, %xmm0
-# endif
-	jbe	LABEL(use_sse4_2_exit)
-# if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L
-	sub	$16, %r11
-	jbe	LABEL(strcmp_exitz_sse4_2)
-# endif
-
-	add	$16, %rdx
-	add	$16, %r10
-	jg	LABEL(nibble_ashr_2_use_sse4_2)
-
-	movdqa	(%rdi, %rdx), %xmm0
-	palignr $2, -16(%rdi, %rdx), %xmm0
-# if !defined USE_AS_STRCASECMP_L && !defined USE_AS_STRNCASECMP_L
-	pcmpistri	$0x1a,(%rsi,%rdx), %xmm0
-# else
-	movdqa	(%rsi,%rdx), %xmm1
-	TOLOWER (%xmm0, %xmm1)
-	pcmpistri $0x1a, %xmm1, %xmm0
-# endif
-	jbe	LABEL(use_sse4_2_exit)
-# if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L
-	sub	$16, %r11
-	jbe	LABEL(strcmp_exitz_sse4_2)
-# endif
-	add	$16, %rdx
-	jmp	LABEL(loop_ashr_2_use_sse4_2)
-
-	.p2align 4
-LABEL(nibble_ashr_2_use_sse4_2):
-	sub	$0x1000, %r10
-	movdqa	-16(%rdi, %rdx), %xmm0
-	psrldq	$2, %xmm0
-	pcmpistri      $0x3a,%xmm0, %xmm0
-# if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L
-	cmp	%r11, %rcx
-	jae	LABEL(nibble_ashr_use_sse4_2_exit)
-# endif
-	cmp	$13, %ecx
-	ja	LABEL(nibble_ashr_2_use_sse4_2_restart)
-
-	jmp	LABEL(nibble_ashr_use_sse4_2_exit)
-
-/*
- * 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_sse4_2):
-	pxor	%xmm0, %xmm0
-	movdqa	(%rdi), %xmm2
-	movdqa	(%rsi), %xmm1
-	pcmpeqb	%xmm1, %xmm0
-	pslldq	$13, %xmm2
-	TOLOWER (%xmm1, %xmm2)
-	pcmpeqb	%xmm1, %xmm2
-	psubb	%xmm0, %xmm2
-	pmovmskb %xmm2, %r9d
-	shr	%cl, %edx
-	shr	%cl, %r9d
-	sub	%r9d, %edx
-	jnz	LABEL(less32bytes_sse4_2)
-	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 */
-	mov	%rcx, %rdx	/* only for offset of sse4 instruction loop*/
-
-LABEL(loop_ashr_3_use_sse4_2):
-	add	$16, %r10
-	jg	LABEL(nibble_ashr_3_use_sse4_2)
-
-LABEL(nibble_ashr_3_use_sse4_2_restart):
-	movdqa	(%rdi, %rdx), %xmm0
-	palignr $3, -16(%rdi, %rdx), %xmm0
-# if !defined USE_AS_STRCASECMP_L && !defined USE_AS_STRNCASECMP_L
-	pcmpistri	$0x1a,(%rsi,%rdx), %xmm0
-# else
-	movdqa	(%rsi,%rdx), %xmm1
-	TOLOWER (%xmm0, %xmm1)
-	pcmpistri $0x1a, %xmm1, %xmm0
-# endif
-	jbe	LABEL(use_sse4_2_exit)
-# if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L
-	sub	$16, %r11
-	jbe	LABEL(strcmp_exitz_sse4_2)
-# endif
-
-	add	$16, %rdx
-	add	$16, %r10
-	jg	LABEL(nibble_ashr_3_use_sse4_2)
-
-	movdqa	(%rdi, %rdx), %xmm0
-	palignr $3, -16(%rdi, %rdx), %xmm0
-# if !defined USE_AS_STRCASECMP_L && !defined USE_AS_STRNCASECMP_L
-	pcmpistri	$0x1a,(%rsi,%rdx), %xmm0
-# else
-	movdqa	(%rsi,%rdx), %xmm1
-	TOLOWER (%xmm0, %xmm1)
-	pcmpistri $0x1a, %xmm1, %xmm0
-# endif
-	jbe	LABEL(use_sse4_2_exit)
-# if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L
-	sub	$16, %r11
-	jbe	LABEL(strcmp_exitz_sse4_2)
-# endif
-	add	$16, %rdx
-	jmp	LABEL(loop_ashr_3_use_sse4_2)
-
-	.p2align 4
-LABEL(nibble_ashr_3_use_sse4_2):
-	sub	$0x1000, %r10
-	movdqa	-16(%rdi, %rdx), %xmm0
-	psrldq	$3, %xmm0
-	pcmpistri      $0x3a,%xmm0, %xmm0
-# if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L
-	cmp	%r11, %rcx
-	jae	LABEL(nibble_ashr_use_sse4_2_exit)
-# endif
-	cmp	$12, %ecx
-	ja	LABEL(nibble_ashr_3_use_sse4_2_restart)
-
-	jmp	LABEL(nibble_ashr_use_sse4_2_exit)
-
-/*
- * 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_sse4_2):
-	pxor	%xmm0, %xmm0
-	movdqa	(%rdi), %xmm2
-	movdqa	(%rsi), %xmm1
-	pcmpeqb	%xmm1, %xmm0
-	pslldq	$12, %xmm2
-	TOLOWER (%xmm1, %xmm2)
-	pcmpeqb	%xmm1, %xmm2
-	psubb	%xmm0, %xmm2
-	pmovmskb %xmm2, %r9d
-	shr	%cl, %edx
-	shr	%cl, %r9d
-	sub	%r9d, %edx
-	jnz	LABEL(less32bytes_sse4_2)
-	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 */
-	mov	%rcx, %rdx	/* only for offset of sse4 instruction loop*/
-
-	.p2align 4
-LABEL(loop_ashr_4_use_sse4_2):
-	add	$16, %r10
-	jg	LABEL(nibble_ashr_4_use_sse4_2)
-
-LABEL(nibble_ashr_4_use_sse4_2_restart):
-	movdqa	(%rdi, %rdx), %xmm0
-	palignr $4, -16(%rdi, %rdx), %xmm0
-# if !defined USE_AS_STRCASECMP_L && !defined USE_AS_STRNCASECMP_L
-	pcmpistri	$0x1a,(%rsi,%rdx), %xmm0
-# else
-	movdqa	(%rsi,%rdx), %xmm1
-	TOLOWER (%xmm0, %xmm1)
-	pcmpistri $0x1a, %xmm1, %xmm0
-# endif
-	jbe	LABEL(use_sse4_2_exit)
-# if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L
-	sub	$16, %r11
-	jbe	LABEL(strcmp_exitz_sse4_2)
-# endif
-
-	add	$16, %rdx
-	add	$16, %r10
-	jg	LABEL(nibble_ashr_4_use_sse4_2)
-
-	movdqa	(%rdi, %rdx), %xmm0
-	palignr $4, -16(%rdi, %rdx), %xmm0
-# if !defined USE_AS_STRCASECMP_L && !defined USE_AS_STRNCASECMP_L
-	pcmpistri	$0x1a,(%rsi,%rdx), %xmm0
-# else
-	movdqa	(%rsi,%rdx), %xmm1
-	TOLOWER (%xmm0, %xmm1)
-	pcmpistri $0x1a, %xmm1, %xmm0
-# endif
-	jbe	LABEL(use_sse4_2_exit)
-# if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L
-	sub	$16, %r11
-	jbe	LABEL(strcmp_exitz_sse4_2)
-# endif
-	add	$16, %rdx
-	jmp	LABEL(loop_ashr_4_use_sse4_2)
-
-	.p2align 4
-LABEL(nibble_ashr_4_use_sse4_2):
-	sub	$0x1000, %r10
-	movdqa	-16(%rdi, %rdx), %xmm0
-	psrldq	$4, %xmm0
-	pcmpistri      $0x3a,%xmm0, %xmm0
-# if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L
-	cmp	%r11, %rcx
-	jae	LABEL(nibble_ashr_use_sse4_2_exit)
-# endif
-	cmp	$11, %ecx
-	ja	LABEL(nibble_ashr_4_use_sse4_2_restart)
-
-	jmp	LABEL(nibble_ashr_use_sse4_2_exit)
-
-/*
- * 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_sse4_2):
-	pxor	%xmm0, %xmm0
-	movdqa	(%rdi), %xmm2
-	movdqa	(%rsi), %xmm1
-	pcmpeqb	%xmm1, %xmm0
-	pslldq	$11, %xmm2
-	TOLOWER (%xmm1, %xmm2)
-	pcmpeqb	%xmm1, %xmm2
-	psubb	%xmm0, %xmm2
-	pmovmskb %xmm2, %r9d
-	shr	%cl, %edx
-	shr	%cl, %r9d
-	sub	%r9d, %edx
-	jnz	LABEL(less32bytes_sse4_2)
-	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 */
-	mov	%rcx, %rdx	/* only for offset of sse4 instruction loop*/
-
-	.p2align 4
-LABEL(loop_ashr_5_use_sse4_2):
-	add	$16, %r10
-	jg	LABEL(nibble_ashr_5_use_sse4_2)
-
-LABEL(nibble_ashr_5_use_sse4_2_restart):
-	movdqa	(%rdi, %rdx), %xmm0
-	palignr $5, -16(%rdi, %rdx), %xmm0
-# if !defined USE_AS_STRCASECMP_L && !defined USE_AS_STRNCASECMP_L
-	pcmpistri	$0x1a,(%rsi,%rdx), %xmm0
-# else
-	movdqa	(%rsi,%rdx), %xmm1
-	TOLOWER (%xmm0, %xmm1)
-	pcmpistri $0x1a, %xmm1, %xmm0
-# endif
-	jbe	LABEL(use_sse4_2_exit)
-# if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L
-	sub	$16, %r11
-	jbe	LABEL(strcmp_exitz_sse4_2)
-# endif
-
-	add	$16, %rdx
-	add	$16, %r10
-	jg	LABEL(nibble_ashr_5_use_sse4_2)
-
-	movdqa	(%rdi, %rdx), %xmm0
-
-	palignr $5, -16(%rdi, %rdx), %xmm0
-# if !defined USE_AS_STRCASECMP_L && !defined USE_AS_STRNCASECMP_L
-	pcmpistri	$0x1a,(%rsi,%rdx), %xmm0
-# else
-	movdqa	(%rsi,%rdx), %xmm1
-	TOLOWER (%xmm0, %xmm1)
-	pcmpistri $0x1a, %xmm1, %xmm0
-# endif
-	jbe	LABEL(use_sse4_2_exit)
-# if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L
-	sub	$16, %r11
-	jbe	LABEL(strcmp_exitz_sse4_2)
-# endif
-	add	$16, %rdx
-	jmp	LABEL(loop_ashr_5_use_sse4_2)
-
-	.p2align 4
-LABEL(nibble_ashr_5_use_sse4_2):
-	sub	$0x1000, %r10
-	movdqa	-16(%rdi, %rdx), %xmm0
-	psrldq	$5, %xmm0
-	pcmpistri      $0x3a,%xmm0, %xmm0
-# if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L
-	cmp	%r11, %rcx
-	jae	LABEL(nibble_ashr_use_sse4_2_exit)
-# endif
-	cmp	$10, %ecx
-	ja	LABEL(nibble_ashr_5_use_sse4_2_restart)
-
-	jmp	LABEL(nibble_ashr_use_sse4_2_exit)
-
-/*
- * 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_sse4_2):
-	pxor	%xmm0, %xmm0
-	movdqa	(%rdi), %xmm2
-	movdqa	(%rsi), %xmm1
-	pcmpeqb	%xmm1, %xmm0
-	pslldq	$10, %xmm2
-	TOLOWER (%xmm1, %xmm2)
-	pcmpeqb	%xmm1, %xmm2
-	psubb	%xmm0, %xmm2
-	pmovmskb %xmm2, %r9d
-	shr	%cl, %edx
-	shr	%cl, %r9d
-	sub	%r9d, %edx
-	jnz	LABEL(less32bytes_sse4_2)
-	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 */
-	mov	%rcx, %rdx	/* only for offset of sse4 instruction loop*/
-
-	.p2align 4
-LABEL(loop_ashr_6_use_sse4_2):
-	add	$16, %r10
-	jg	LABEL(nibble_ashr_6_use_sse4_2)
-
-LABEL(nibble_ashr_6_use_sse4_2_restart):
-	movdqa	(%rdi, %rdx), %xmm0
-	palignr $6, -16(%rdi, %rdx), %xmm0
-# if !defined USE_AS_STRCASECMP_L && !defined USE_AS_STRNCASECMP_L
-	pcmpistri $0x1a,(%rsi,%rdx), %xmm0
-# else
-	movdqa	(%rsi,%rdx), %xmm1
-	TOLOWER (%xmm0, %xmm1)
-	pcmpistri $0x1a, %xmm1, %xmm0
-# endif
-	jbe	LABEL(use_sse4_2_exit)
-# if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L
-	sub	$16, %r11
-	jbe	LABEL(strcmp_exitz_sse4_2)
-# endif
-
-	add	$16, %rdx
-	add	$16, %r10
-	jg	LABEL(nibble_ashr_6_use_sse4_2)
-
-	movdqa	(%rdi, %rdx), %xmm0
-	palignr $6, -16(%rdi, %rdx), %xmm0
-# if !defined USE_AS_STRCASECMP_L && !defined USE_AS_STRNCASECMP_L
-	pcmpistri $0x1a,(%rsi,%rdx), %xmm0
-# else
-	movdqa	(%rsi,%rdx), %xmm1
-	TOLOWER (%xmm0, %xmm1)
-	pcmpistri $0x1a, %xmm1, %xmm0
-# endif
-	jbe	LABEL(use_sse4_2_exit)
-# if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L
-	sub	$16, %r11
-	jbe	LABEL(strcmp_exitz_sse4_2)
-# endif
-	add	$16, %rdx
-	jmp	LABEL(loop_ashr_6_use_sse4_2)
-
-	.p2align 4
-LABEL(nibble_ashr_6_use_sse4_2):
-	sub	$0x1000, %r10
-	movdqa	-16(%rdi, %rdx), %xmm0
-	psrldq	$6, %xmm0
-	pcmpistri      $0x3a,%xmm0, %xmm0
-# if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L
-	cmp	%r11, %rcx
-	jae	LABEL(nibble_ashr_use_sse4_2_exit)
-# endif
-	cmp	$9, %ecx
-	ja	LABEL(nibble_ashr_6_use_sse4_2_restart)
-
-	jmp	LABEL(nibble_ashr_use_sse4_2_exit)
-
-/*
- * 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_sse4_2):
-	pxor	%xmm0, %xmm0
-	movdqa	(%rdi), %xmm2
-	movdqa	(%rsi), %xmm1
-	pcmpeqb	%xmm1, %xmm0
-	pslldq	$9, %xmm2
-	TOLOWER (%xmm1, %xmm2)
-	pcmpeqb	%xmm1, %xmm2
-	psubb	%xmm0, %xmm2
-	pmovmskb %xmm2, %r9d
-	shr	%cl, %edx
-	shr	%cl, %r9d
-	sub	%r9d, %edx
-	jnz	LABEL(less32bytes_sse4_2)
-	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 */
-	mov	%rcx, %rdx	/* only for offset of sse4 instruction loop*/
-
-	.p2align 4
-LABEL(loop_ashr_7_use_sse4_2):
-	add	$16, %r10
-	jg	LABEL(nibble_ashr_7_use_sse4_2)
-
-LABEL(nibble_ashr_7_use_sse4_2_restart):
-	movdqa	(%rdi, %rdx), %xmm0
-	palignr $7, -16(%rdi, %rdx), %xmm0
-# if !defined USE_AS_STRCASECMP_L && !defined USE_AS_STRNCASECMP_L
-	pcmpistri	$0x1a,(%rsi,%rdx), %xmm0
-# else
-	movdqa	(%rsi,%rdx), %xmm1
-	TOLOWER (%xmm0, %xmm1)
-	pcmpistri $0x1a, %xmm1, %xmm0
-# endif
-	jbe	LABEL(use_sse4_2_exit)
-# if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L
-	sub	$16, %r11
-	jbe	LABEL(strcmp_exitz_sse4_2)
-# endif
-
-	add	$16, %rdx
-	add	$16, %r10
-	jg	LABEL(nibble_ashr_7_use_sse4_2)
-
-	movdqa	(%rdi, %rdx), %xmm0
-	palignr $7, -16(%rdi, %rdx), %xmm0
-# if !defined USE_AS_STRCASECMP_L && !defined USE_AS_STRNCASECMP_L
-	pcmpistri	$0x1a,(%rsi,%rdx), %xmm0
-# else
-	movdqa	(%rsi,%rdx), %xmm1
-	TOLOWER (%xmm0, %xmm1)
-	pcmpistri $0x1a, %xmm1, %xmm0
-# endif
-	jbe	LABEL(use_sse4_2_exit)
-# if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L
-	sub	$16, %r11
-	jbe	LABEL(strcmp_exitz_sse4_2)
-# endif
-	add	$16, %rdx
-	jmp	LABEL(loop_ashr_7_use_sse4_2)
-
-	.p2align 4
-LABEL(nibble_ashr_7_use_sse4_2):
-	sub	$0x1000, %r10
-	movdqa	-16(%rdi, %rdx), %xmm0
-	psrldq	$7, %xmm0
-	pcmpistri      $0x3a,%xmm0, %xmm0
-# if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L
-	cmp	%r11, %rcx
-	jae	LABEL(nibble_ashr_use_sse4_2_exit)
-# endif
-	cmp	$8, %ecx
-	ja	LABEL(nibble_ashr_7_use_sse4_2_restart)
-
-	jmp	LABEL(nibble_ashr_use_sse4_2_exit)
-
-/*
- *  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_sse4_2):
-	pxor	%xmm0, %xmm0
-	movdqa	(%rdi), %xmm2
-	movdqa	(%rsi), %xmm1
-	pcmpeqb	%xmm1, %xmm0
-	pslldq	$8, %xmm2
-	TOLOWER (%xmm1, %xmm2)
-	pcmpeqb	%xmm1, %xmm2
-	psubb	%xmm0, %xmm2
-	pmovmskb %xmm2, %r9d
-	shr	%cl, %edx
-	shr	%cl, %r9d
-	sub	%r9d, %edx
-	jnz	LABEL(less32bytes_sse4_2)
-	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 */
-	mov	%rcx, %rdx	/* only for offset of sse4 instruction loop*/
-
-	.p2align 4
-LABEL(loop_ashr_8_use_sse4_2):
-	add	$16, %r10
-	jg	LABEL(nibble_ashr_8_use_sse4_2)
-
-LABEL(nibble_ashr_8_use_sse4_2_restart):
-	movdqa	(%rdi, %rdx), %xmm0
-	palignr $8, -16(%rdi, %rdx), %xmm0
-# if !defined USE_AS_STRCASECMP_L && !defined USE_AS_STRNCASECMP_L
-	pcmpistri $0x1a, (%rsi,%rdx), %xmm0
-# else
-	movdqa	(%rsi,%rdx), %xmm1
-	TOLOWER (%xmm0, %xmm1)
-	pcmpistri $0x1a, %xmm1, %xmm0
-# endif
-	jbe	LABEL(use_sse4_2_exit)
-# if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L
-	sub	$16, %r11
-	jbe	LABEL(strcmp_exitz_sse4_2)
-# endif
-
-	add	$16, %rdx
-	add	$16, %r10
-	jg	LABEL(nibble_ashr_8_use_sse4_2)
-
-	movdqa	(%rdi, %rdx), %xmm0
-	palignr $8, -16(%rdi, %rdx), %xmm0
-# if !defined USE_AS_STRCASECMP_L && !defined USE_AS_STRNCASECMP_L
-	pcmpistri $0x1a, (%rsi,%rdx), %xmm0
-# else
-	movdqa	(%rsi,%rdx), %xmm1
-	TOLOWER (%xmm0, %xmm1)
-	pcmpistri $0x1a, %xmm1, %xmm0
-# endif
-	jbe	LABEL(use_sse4_2_exit)
-# if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L
-	sub	$16, %r11
-	jbe	LABEL(strcmp_exitz_sse4_2)
-# endif
-	add	$16, %rdx
-	jmp	LABEL(loop_ashr_8_use_sse4_2)
-
-	.p2align 4
-LABEL(nibble_ashr_8_use_sse4_2):
-	sub	$0x1000, %r10
-	movdqa	-16(%rdi, %rdx), %xmm0
-	psrldq	$8, %xmm0
-	pcmpistri      $0x3a,%xmm0, %xmm0
-# if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L
-	cmp	%r11, %rcx
-	jae	LABEL(nibble_ashr_use_sse4_2_exit)
-# endif
-	cmp	$7, %ecx
-	ja	LABEL(nibble_ashr_8_use_sse4_2_restart)
-
-	jmp	LABEL(nibble_ashr_use_sse4_2_exit)
-
-/*
- *  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_sse4_2):
-	pxor	%xmm0, %xmm0
-	movdqa	(%rdi), %xmm2
-	movdqa	(%rsi), %xmm1
-	pcmpeqb	%xmm1, %xmm0
-	pslldq	$7, %xmm2
-	TOLOWER (%xmm1, %xmm2)
-	pcmpeqb	%xmm1, %xmm2
-	psubb	%xmm0, %xmm2
-	pmovmskb %xmm2, %r9d
-	shr	%cl, %edx
-	shr	%cl, %r9d
-	sub	%r9d, %edx
-	jnz	LABEL(less32bytes_sse4_2)
-	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 */
-	mov	%rcx, %rdx	/* only for offset of sse4 instruction loop*/
-
-	.p2align 4
-LABEL(loop_ashr_9_use_sse4_2):
-	add	$16, %r10
-	jg	LABEL(nibble_ashr_9_use_sse4_2)
-
-LABEL(nibble_ashr_9_use_sse4_2_restart):
-	movdqa	(%rdi, %rdx), %xmm0
-
-	palignr $9, -16(%rdi, %rdx), %xmm0
-# if !defined USE_AS_STRCASECMP_L && !defined USE_AS_STRNCASECMP_L
-	pcmpistri $0x1a, (%rsi,%rdx), %xmm0
-# else
-	movdqa	(%rsi,%rdx), %xmm1
-	TOLOWER (%xmm0, %xmm1)
-	pcmpistri $0x1a, %xmm1, %xmm0
-# endif
-	jbe	LABEL(use_sse4_2_exit)
-# if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L
-	sub	$16, %r11
-	jbe	LABEL(strcmp_exitz_sse4_2)
-# endif
-
-	add	$16, %rdx
-	add	$16, %r10
-	jg	LABEL(nibble_ashr_9_use_sse4_2)
-
-	movdqa	(%rdi, %rdx), %xmm0
-	palignr $9, -16(%rdi, %rdx), %xmm0
-# if !defined USE_AS_STRCASECMP_L && !defined USE_AS_STRNCASECMP_L
-	pcmpistri $0x1a, (%rsi,%rdx), %xmm0
-# else
-	movdqa	(%rsi,%rdx), %xmm1
-	TOLOWER (%xmm0, %xmm1)
-	pcmpistri $0x1a, %xmm1, %xmm0
-# endif
-	jbe	LABEL(use_sse4_2_exit)
-# if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L
-	sub	$16, %r11
-	jbe	LABEL(strcmp_exitz_sse4_2)
-# endif
-	add	$16, %rdx
-	jmp	LABEL(loop_ashr_9_use_sse4_2)
-
-	.p2align 4
-LABEL(nibble_ashr_9_use_sse4_2):
-	sub	$0x1000, %r10
-	movdqa	-16(%rdi, %rdx), %xmm0
-	psrldq	$9, %xmm0
-	pcmpistri      $0x3a,%xmm0, %xmm0
-# if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L
-	cmp	%r11, %rcx
-	jae	LABEL(nibble_ashr_use_sse4_2_exit)
-# endif
-	cmp	$6, %ecx
-	ja	LABEL(nibble_ashr_9_use_sse4_2_restart)
-
-	jmp	LABEL(nibble_ashr_use_sse4_2_exit)
-
-/*
- *  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_sse4_2):
-	pxor	%xmm0, %xmm0
-	movdqa	(%rdi), %xmm2
-	movdqa	(%rsi), %xmm1
-	pcmpeqb	%xmm1, %xmm0
-	pslldq	$6, %xmm2
-	TOLOWER (%xmm1, %xmm2)
-	pcmpeqb	%xmm1, %xmm2
-	psubb	%xmm0, %xmm2
-	pmovmskb %xmm2, %r9d
-	shr	%cl, %edx
-	shr	%cl, %r9d
-	sub	%r9d, %edx
-	jnz	LABEL(less32bytes_sse4_2)
-	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 */
-	mov	%rcx, %rdx	/* only for offset of sse4 instruction loop*/
-
-	.p2align 4
-LABEL(loop_ashr_10_use_sse4_2):
-	add	$16, %r10
-	jg	LABEL(nibble_ashr_10_use_sse4_2)
-
-LABEL(nibble_ashr_10_use_sse4_2_restart):
-	movdqa	(%rdi, %rdx), %xmm0
-	palignr $10, -16(%rdi, %rdx), %xmm0
-# if !defined USE_AS_STRCASECMP_L && !defined USE_AS_STRNCASECMP_L
-	pcmpistri $0x1a, (%rsi,%rdx), %xmm0
-# else
-	movdqa	(%rsi,%rdx), %xmm1
-	TOLOWER (%xmm0, %xmm1)
-	pcmpistri $0x1a, %xmm1, %xmm0
-# endif
-	jbe	LABEL(use_sse4_2_exit)
-# if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L
-	sub	$16, %r11
-	jbe	LABEL(strcmp_exitz_sse4_2)
-# endif
-
-	add	$16, %rdx
-	add	$16, %r10
-	jg	LABEL(nibble_ashr_10_use_sse4_2)
-
-	movdqa	(%rdi, %rdx), %xmm0
-	palignr $10, -16(%rdi, %rdx), %xmm0
-# if !defined USE_AS_STRCASECMP_L && !defined USE_AS_STRNCASECMP_L
-	pcmpistri $0x1a, (%rsi,%rdx), %xmm0
-# else
-	movdqa	(%rsi,%rdx), %xmm1
-	TOLOWER (%xmm0, %xmm1)
-	pcmpistri $0x1a, %xmm1, %xmm0
-# endif
-	jbe	LABEL(use_sse4_2_exit)
-# if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L
-	sub	$16, %r11
-	jbe	LABEL(strcmp_exitz_sse4_2)
-# endif
-	add	$16, %rdx
-	jmp	LABEL(loop_ashr_10_use_sse4_2)
-
-	.p2align 4
-LABEL(nibble_ashr_10_use_sse4_2):
-	sub	$0x1000, %r10
-	movdqa	-16(%rdi, %rdx), %xmm0
-	psrldq	$10, %xmm0
-	pcmpistri      $0x3a,%xmm0, %xmm0
-# if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L
-	cmp	%r11, %rcx
-	jae	LABEL(nibble_ashr_use_sse4_2_exit)
-# endif
-	cmp	$5, %ecx
-	ja	LABEL(nibble_ashr_10_use_sse4_2_restart)
-
-	jmp	LABEL(nibble_ashr_use_sse4_2_exit)
-
-/*
- *  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_sse4_2):
-	pxor	%xmm0, %xmm0
-	movdqa	(%rdi), %xmm2
-	movdqa	(%rsi), %xmm1
-	pcmpeqb	%xmm1, %xmm0
-	pslldq	$5, %xmm2
-	TOLOWER (%xmm1, %xmm2)
-	pcmpeqb	%xmm1, %xmm2
-	psubb	%xmm0, %xmm2
-	pmovmskb %xmm2, %r9d
-	shr	%cl, %edx
-	shr	%cl, %r9d
-	sub	%r9d, %edx
-	jnz	LABEL(less32bytes_sse4_2)
-	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 */
-	mov	%rcx, %rdx	/* only for offset of sse4 instruction loop*/
-
-	.p2align 4
-LABEL(loop_ashr_11_use_sse4_2):
-	add	$16, %r10
-	jg	LABEL(nibble_ashr_11_use_sse4_2)
-
-LABEL(nibble_ashr_11_use_sse4_2_restart):
-	movdqa	(%rdi, %rdx), %xmm0
-	palignr $11, -16(%rdi, %rdx), %xmm0
-# if !defined USE_AS_STRCASECMP_L && !defined USE_AS_STRNCASECMP_L
-	pcmpistri $0x1a, (%rsi,%rdx), %xmm0
-# else
-	movdqa	(%rsi,%rdx), %xmm1
-	TOLOWER (%xmm0, %xmm1)
-	pcmpistri $0x1a, %xmm1, %xmm0
-# endif
-	jbe	LABEL(use_sse4_2_exit)
-# if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L
-	sub	$16, %r11
-	jbe	LABEL(strcmp_exitz_sse4_2)
-# endif
-
-	add	$16, %rdx
-	add	$16, %r10
-	jg	LABEL(nibble_ashr_11_use_sse4_2)
-
-	movdqa	(%rdi, %rdx), %xmm0
-	palignr $11, -16(%rdi, %rdx), %xmm0
-# if !defined USE_AS_STRCASECMP_L && !defined USE_AS_STRNCASECMP_L
-	pcmpistri $0x1a, (%rsi,%rdx), %xmm0
-# else
-	movdqa	(%rsi,%rdx), %xmm1
-	TOLOWER (%xmm0, %xmm1)
-	pcmpistri $0x1a, %xmm1, %xmm0
-# endif
-	jbe	LABEL(use_sse4_2_exit)
-# if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L
-	sub	$16, %r11
-	jbe	LABEL(strcmp_exitz_sse4_2)
-# endif
-	add	$16, %rdx
-	jmp	LABEL(loop_ashr_11_use_sse4_2)
-
-	.p2align 4
-LABEL(nibble_ashr_11_use_sse4_2):
-	sub	$0x1000, %r10
-	movdqa	-16(%rdi, %rdx), %xmm0
-	psrldq	$11, %xmm0
-	pcmpistri      $0x3a,%xmm0, %xmm0
-# if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L
-	cmp	%r11, %rcx
-	jae	LABEL(nibble_ashr_use_sse4_2_exit)
-# endif
-	cmp	$4, %ecx
-	ja	LABEL(nibble_ashr_11_use_sse4_2_restart)
-
-	jmp	LABEL(nibble_ashr_use_sse4_2_exit)
-
-/*
- *  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_sse4_2):
-	pxor	%xmm0, %xmm0
-	movdqa	(%rdi), %xmm2
-	movdqa	(%rsi), %xmm1
-	pcmpeqb	%xmm1, %xmm0
-	pslldq	$4, %xmm2
-	TOLOWER (%xmm1, %xmm2)
-	pcmpeqb	%xmm1, %xmm2
-	psubb	%xmm0, %xmm2
-	pmovmskb %xmm2, %r9d
-	shr	%cl, %edx
-	shr	%cl, %r9d
-	sub	%r9d, %edx
-	jnz	LABEL(less32bytes_sse4_2)
-	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 */
-	mov	%rcx, %rdx	/* only for offset of sse4 instruction loop*/
-
-	.p2align 4
-LABEL(loop_ashr_12_use_sse4_2):
-	add	$16, %r10
-	jg	LABEL(nibble_ashr_12_use_sse4_2)
-
-LABEL(nibble_ashr_12_use_sse4_2_restart):
-	movdqa	(%rdi, %rdx), %xmm0
-	palignr $12, -16(%rdi, %rdx), %xmm0
-# if !defined USE_AS_STRCASECMP_L && !defined USE_AS_STRNCASECMP_L
-	pcmpistri $0x1a, (%rsi,%rdx), %xmm0
-# else
-	movdqa	(%rsi,%rdx), %xmm1
-	TOLOWER (%xmm0, %xmm1)
-	pcmpistri $0x1a, %xmm1, %xmm0
-# endif
-	jbe	LABEL(use_sse4_2_exit)
-# if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L
-	sub	$16, %r11
-	jbe	LABEL(strcmp_exitz_sse4_2)
-# endif
-
-	add	$16, %rdx
-	add	$16, %r10
-	jg	LABEL(nibble_ashr_12_use_sse4_2)
-
-	movdqa	(%rdi, %rdx), %xmm0
-	palignr $12, -16(%rdi, %rdx), %xmm0
-# if !defined USE_AS_STRCASECMP_L && !defined USE_AS_STRNCASECMP_L
-	pcmpistri $0x1a, (%rsi,%rdx), %xmm0
-# else
-	movdqa	(%rsi,%rdx), %xmm1
-	TOLOWER (%xmm0, %xmm1)
-	pcmpistri $0x1a, %xmm1, %xmm0
 # endif
-	jbe	LABEL(use_sse4_2_exit)
-# if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L
-	sub	$16, %r11
-	jbe	LABEL(strcmp_exitz_sse4_2)
-# endif
-	add	$16, %rdx
-	jmp	LABEL(loop_ashr_12_use_sse4_2)
-
-	.p2align 4
-LABEL(nibble_ashr_12_use_sse4_2):
-	sub	$0x1000, %r10
-	movdqa	-16(%rdi, %rdx), %xmm0
-	psrldq	$12, %xmm0
-	pcmpistri      $0x3a,%xmm0, %xmm0
-# if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L
-	cmp	%r11, %rcx
-	jae	LABEL(nibble_ashr_use_sse4_2_exit)
-# endif
-	cmp	$3, %ecx
-	ja	LABEL(nibble_ashr_12_use_sse4_2_restart)
-
-	jmp	LABEL(nibble_ashr_use_sse4_2_exit)
-
-/*
- *  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_sse4_2):
-	pxor	%xmm0, %xmm0
-	movdqa	(%rdi), %xmm2
-	movdqa	(%rsi), %xmm1
-	pcmpeqb	%xmm1, %xmm0
-	pslldq	$3, %xmm2
-	TOLOWER (%xmm1, %xmm2)
-	pcmpeqb	%xmm1, %xmm2
-	psubb	%xmm0, %xmm2
-	pmovmskb %xmm2, %r9d
-	shr	%cl, %edx
-	shr	%cl, %r9d
-	sub	%r9d, %edx
-	jnz	LABEL(less32bytes_sse4_2)
-	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 */
-
-	mov	%rcx, %rdx	/* only for offset of sse4 instruction loop*/
-
-	.p2align 4
-LABEL(loop_ashr_13_use_sse4_2):
-	add	$16, %r10
-	jg	LABEL(nibble_ashr_13_use_sse4_2)
-
-LABEL(nibble_ashr_13_use_sse4_2_restart):
-	movdqa	(%rdi, %rdx), %xmm0
-	palignr $13, -16(%rdi, %rdx), %xmm0
-# if !defined USE_AS_STRCASECMP_L && !defined USE_AS_STRNCASECMP_L
-	pcmpistri $0x1a, (%rsi,%rdx), %xmm0
-# else
-	movdqa	(%rsi,%rdx), %xmm1
-	TOLOWER (%xmm0, %xmm1)
-	pcmpistri $0x1a, %xmm1, %xmm0
-# endif
-	jbe	LABEL(use_sse4_2_exit)
-# if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L
-	sub	$16, %r11
-	jbe	LABEL(strcmp_exitz_sse4_2)
-# endif
-
-	add	$16, %rdx
-	add	$16, %r10
-	jg	LABEL(nibble_ashr_13_use_sse4_2)
-
-	movdqa	(%rdi, %rdx), %xmm0
-	palignr $13, -16(%rdi, %rdx), %xmm0
-# if !defined USE_AS_STRCASECMP_L && !defined USE_AS_STRNCASECMP_L
-	pcmpistri $0x1a, (%rsi,%rdx), %xmm0
-# else
-	movdqa	(%rsi,%rdx), %xmm1
-	TOLOWER (%xmm0, %xmm1)
-	pcmpistri $0x1a, %xmm1, %xmm0
-# endif
-	jbe	LABEL(use_sse4_2_exit)
-# if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L
-	sub	$16, %r11
-	jbe	LABEL(strcmp_exitz_sse4_2)
-# endif
-	add	$16, %rdx
-	jmp	LABEL(loop_ashr_13_use_sse4_2)
-
-	.p2align 4
-LABEL(nibble_ashr_13_use_sse4_2):
-	sub	$0x1000, %r10
-	movdqa	-16(%rdi, %rdx), %xmm0
-	psrldq	$13, %xmm0
-	pcmpistri      $0x3a,%xmm0, %xmm0
-# if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L
-	cmp	%r11, %rcx
-	jae	LABEL(nibble_ashr_use_sse4_2_exit)
-# endif
-	cmp	$2, %ecx
-	ja	LABEL(nibble_ashr_13_use_sse4_2_restart)
-
-	jmp	LABEL(nibble_ashr_use_sse4_2_exit)
-
-/*
- *  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_sse4_2):
-	pxor	%xmm0, %xmm0
-	movdqa	(%rdi), %xmm2
-	movdqa	(%rsi), %xmm1
-	pcmpeqb	%xmm1, %xmm0
-	pslldq  $2, %xmm2
-	TOLOWER (%xmm1, %xmm2)
-	pcmpeqb	%xmm1, %xmm2
-	psubb	%xmm0, %xmm2
-	pmovmskb %xmm2, %r9d
-	shr	%cl, %edx
-	shr	%cl, %r9d
-	sub	%r9d, %edx
-	jnz	LABEL(less32bytes_sse4_2)
-	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 */
-
-	mov	%rcx, %rdx	/* only for offset of sse4 instruction loop*/
-
-	.p2align 4
-LABEL(loop_ashr_14_use_sse4_2):
-	add	$16, %r10
-	jg	LABEL(nibble_ashr_14_use_sse4_2)
-
-LABEL(nibble_ashr_14_use_sse4_2_restart):
-	movdqa	(%rdi, %rdx), %xmm0
-	palignr $14, -16(%rdi, %rdx), %xmm0
-# if !defined USE_AS_STRCASECMP_L && !defined USE_AS_STRNCASECMP_L
-	pcmpistri $0x1a, (%rsi,%rdx), %xmm0
-# else
-	movdqa	(%rsi,%rdx), %xmm1
-	TOLOWER (%xmm0, %xmm1)
-	pcmpistri $0x1a, %xmm1, %xmm0
-# endif
-	jbe	LABEL(use_sse4_2_exit)
-# if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L
-	sub	$16, %r11
-	jbe	LABEL(strcmp_exitz_sse4_2)
-# endif
-
-	add	$16, %rdx
-	add	$16, %r10
-	jg	LABEL(nibble_ashr_14_use_sse4_2)
-
-	movdqa	(%rdi, %rdx), %xmm0
-	palignr $14, -16(%rdi, %rdx), %xmm0
-# if !defined USE_AS_STRCASECMP_L && !defined USE_AS_STRNCASECMP_L
-	pcmpistri $0x1a, (%rsi,%rdx), %xmm0
-# else
-	movdqa	(%rsi,%rdx), %xmm1
-	TOLOWER (%xmm0, %xmm1)
-	pcmpistri $0x1a, %xmm1, %xmm0
-# endif
-	jbe	LABEL(use_sse4_2_exit)
-# if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L
-	sub	$16, %r11
-	jbe	LABEL(strcmp_exitz_sse4_2)
-# endif
-	add	$16, %rdx
-	jmp	LABEL(loop_ashr_14_use_sse4_2)
-
-	.p2align 4
-LABEL(nibble_ashr_14_use_sse4_2):
-	sub	$0x1000, %r10
-	movdqa	-16(%rdi, %rdx), %xmm0
-	psrldq	$14, %xmm0
-	pcmpistri      $0x3a,%xmm0, %xmm0
-# if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L
-	cmp	%r11, %rcx
-	jae	LABEL(nibble_ashr_use_sse4_2_exit)
-# endif
-	cmp	$1, %ecx
-	ja	LABEL(nibble_ashr_14_use_sse4_2_restart)
-
-	jmp	LABEL(nibble_ashr_use_sse4_2_exit)
-
-/*
- *  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_sse4_2):
-	pxor	%xmm0, %xmm0
-	movdqa	(%rdi), %xmm2
-	movdqa	(%rsi), %xmm1
-	pcmpeqb	%xmm1, %xmm0
-	pslldq	$1, %xmm2
-	TOLOWER (%xmm1, %xmm2)
-	pcmpeqb	%xmm1, %xmm2
-	psubb	%xmm0, %xmm2
-	pmovmskb %xmm2, %r9d
-	shr	%cl, %edx
-	shr	%cl, %r9d
-	sub	%r9d, %edx
-	jnz	LABEL(less32bytes_sse4_2)
-
-	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 */
-
-	mov	%rcx, %rdx	/* only for offset of sse4 instruction loop*/
-
-	.p2align 4
-LABEL(loop_ashr_15_use_sse4_2):
-	add	$16, %r10
-	jg	LABEL(nibble_ashr_15_use_sse4_2)
-
-LABEL(nibble_ashr_15_use_sse4_2_restart):
-	movdqa	(%rdi, %rdx), %xmm0
-	palignr $15, -16(%rdi, %rdx), %xmm0
-# if !defined USE_AS_STRCASECMP_L && !defined USE_AS_STRNCASECMP_L
-	pcmpistri $0x1a, (%rsi,%rdx), %xmm0
-# else
-	movdqa	(%rsi,%rdx), %xmm1
-	TOLOWER (%xmm0, %xmm1)
-	pcmpistri $0x1a, %xmm1, %xmm0
-# endif
-	jbe	LABEL(use_sse4_2_exit)
-# if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L
-	sub	$16, %r11
-	jbe	LABEL(strcmp_exitz_sse4_2)
-# endif
-
-	add	$16, %rdx
-	add	$16, %r10
-	jg	LABEL(nibble_ashr_15_use_sse4_2)
-
-	movdqa	(%rdi, %rdx), %xmm0
-	palignr $15, -16(%rdi, %rdx), %xmm0
-# if !defined USE_AS_STRCASECMP_L && !defined USE_AS_STRNCASECMP_L
-	pcmpistri $0x1a, (%rsi,%rdx), %xmm0
-# else
-	movdqa	(%rsi,%rdx), %xmm1
-	TOLOWER (%xmm0, %xmm1)
-	pcmpistri $0x1a, %xmm1, %xmm0
-# endif
-	jbe	LABEL(use_sse4_2_exit)
-# if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L
-	sub	$16, %r11
-	jbe	LABEL(strcmp_exitz_sse4_2)
-# endif
-	add	$16, %rdx
-	jmp	LABEL(loop_ashr_15_use_sse4_2)
-
-	.p2align 4
-LABEL(nibble_ashr_15_use_sse4_2):
-	sub	$0x1000, %r10
-	movdqa	-16(%rdi, %rdx), %xmm0
-	psrldq	$15, %xmm0
-	pcmpistri      $0x3a,%xmm0, %xmm0
-# if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L
-	cmp	%r11, %rcx
-	jae	LABEL(nibble_ashr_use_sse4_2_exit)
-# endif
-	cmp	$0, %ecx
-	ja	LABEL(nibble_ashr_15_use_sse4_2_restart)
-
-LABEL(nibble_ashr_use_sse4_2_exit):
-# if !defined USE_AS_STRCASECMP_L && !defined USE_AS_STRNCASECMP_L
-	pcmpistri      $0x1a,(%rsi,%rdx), %xmm0
-# else
-	movdqa	(%rsi,%rdx), %xmm1
-	TOLOWER (%xmm0, %xmm1)
-	pcmpistri $0x1a, %xmm1, %xmm0
-# endif
-	.p2align 4
-LABEL(use_sse4_2_exit):
-	jnc	LABEL(strcmp_exitz_sse4_2)
-# if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L
-	sub	%rcx, %r11
-	jbe	LABEL(strcmp_exitz_sse4_2)
-# endif
-	add	%rcx, %rdx
-	lea	-16(%rdi, %r9), %rdi
-	movzbl	(%rdi, %rdx), %eax
-	movzbl	(%rsi, %rdx), %edx
-	test	%r8d, %r8d
-	jz	LABEL(use_sse4_2_ret_sse4_2)
-	xchg	%eax, %edx
-LABEL(use_sse4_2_ret_sse4_2):
-# if defined USE_AS_STRCASECMP_L || defined USE_AS_STRNCASECMP_L
-	leaq	_nl_C_LC_CTYPE_tolower+128*4(%rip), %rcx
-	movl	(%rcx,%rdx,4), %edx
-	movl	(%rcx,%rax,4), %eax
-# endif
-
-	sub	%edx, %eax
-	ret
-
-LABEL(less32bytes_sse4_2):
-	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_sse4_2)
-	xchg	%rsi, %rdi		/* recover original order according to flag(%r8d) */
-
-	.p2align 4
-LABEL(ret_sse4_2):
-LABEL(less16bytes_sse4_2):
-	bsf	%rdx, %rdx		/* find and store bit index in %rdx */
-
-# if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L
-	sub	%rdx, %r11
-	jbe	LABEL(strcmp_exitz_sse4_2)
-# endif
-	movzbl	(%rsi, %rdx), %ecx
-	movzbl	(%rdi, %rdx), %eax
-
-# if defined USE_AS_STRCASECMP_L || defined USE_AS_STRNCASECMP_L
-	leaq	_nl_C_LC_CTYPE_tolower+128*4(%rip), %rdx
-	movl	(%rdx,%rcx,4), %ecx
-	movl	(%rdx,%rax,4), %eax
-# endif
-
-	sub	%ecx, %eax
-	ret
-
-LABEL(strcmp_exitz_sse4_2):
-	xor	%eax, %eax
-	ret
-
-	.p2align 4
-	// XXX Same as code above
-LABEL(Byte0_sse4_2):
-	movzx	(%rsi), %ecx
-	movzx	(%rdi), %eax
-
-# if defined USE_AS_STRCASECMP_L || defined USE_AS_STRNCASECMP_L
-	leaq	_nl_C_LC_CTYPE_tolower+128*4(%rip), %rdx
-	movl	(%rdx,%rcx,4), %ecx
-	movl	(%rdx,%rax,4), %eax
-# endif
-
-	sub	%ecx, %eax
-	ret
-	cfi_endproc
-	.size	STRCMP_SSE42, .-STRCMP_SSE42
-
-# undef UCLOW_reg
-# undef UCHIGH_reg
-# undef LCQWORD_reg
-# undef TOLOWER
-
-	/* Put all SSE 4.2 functions together.  */
-	.section .rodata.sse4.2,"a",@progbits
-	.p2align 3
-LABEL(unaligned_table_sse4_2):
-	.int	LABEL(ashr_1_sse4_2) - LABEL(unaligned_table_sse4_2)
-	.int	LABEL(ashr_2_sse4_2) - LABEL(unaligned_table_sse4_2)
-	.int	LABEL(ashr_3_sse4_2) - LABEL(unaligned_table_sse4_2)
-	.int	LABEL(ashr_4_sse4_2) - LABEL(unaligned_table_sse4_2)
-	.int	LABEL(ashr_5_sse4_2) - LABEL(unaligned_table_sse4_2)
-	.int	LABEL(ashr_6_sse4_2) - LABEL(unaligned_table_sse4_2)
-	.int	LABEL(ashr_7_sse4_2) - LABEL(unaligned_table_sse4_2)
-	.int	LABEL(ashr_8_sse4_2) - LABEL(unaligned_table_sse4_2)
-	.int	LABEL(ashr_9_sse4_2) - LABEL(unaligned_table_sse4_2)
-	.int	LABEL(ashr_10_sse4_2) - LABEL(unaligned_table_sse4_2)
-	.int	LABEL(ashr_11_sse4_2) - LABEL(unaligned_table_sse4_2)
-	.int	LABEL(ashr_12_sse4_2) - LABEL(unaligned_table_sse4_2)
-	.int	LABEL(ashr_13_sse4_2) - LABEL(unaligned_table_sse4_2)
-	.int	LABEL(ashr_14_sse4_2) - LABEL(unaligned_table_sse4_2)
-	.int	LABEL(ashr_15_sse4_2) - LABEL(unaligned_table_sse4_2)
-	.int	LABEL(ashr_0_sse4_2) - LABEL(unaligned_table_sse4_2)
 
 
 # undef ENTRY
-- 
2.7.4