diff --git a/libc/arch-x86/string/sse2-wcscmp-atom.S b/libc/arch-x86/string/sse2-wcscmp-atom.S
new file mode 100644
index 0000000..8867d28
--- /dev/null
+++ b/libc/arch-x86/string/sse2-wcscmp-atom.S
@@ -0,0 +1,1062 @@
+/*
+Copyright (c) 2011 Intel Corporation
+All rights reserved.
+
+Redistribution and use in source and binary forms, with or without
+modification, are permitted provided that the following conditions are met:
+
+    * Redistributions of source code must retain the above copyright notice,
+    * this list of conditions and the following disclaimer.
+
+    * Redistributions in binary form must reproduce the above copyright notice,
+    * this list of conditions and the following disclaimer in the documentation
+    * and/or other materials provided with the distribution.
+
+    * Neither the name of Intel Corporation nor the names of its contributors
+    * may be used to endorse or promote products derived from this software
+    * without specific prior written permission.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
+ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR
+ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
+ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+*/
+
+#ifndef L
+# define L(label)	.L##label
+#endif
+
+#ifndef cfi_startproc
+# define cfi_startproc	.cfi_startproc
+#endif
+
+#ifndef cfi_endproc
+# define cfi_endproc	.cfi_endproc
+#endif
+
+#ifndef cfi_rel_offset
+# define cfi_rel_offset(reg, off)	.cfi_rel_offset reg, off
+#endif
+
+#ifndef cfi_restore
+# define cfi_restore(reg)	.cfi_restore reg
+#endif
+
+#ifndef cfi_adjust_cfa_offset
+# define cfi_adjust_cfa_offset(off)	.cfi_adjust_cfa_offset off
+#endif
+
+#ifndef ENTRY
+# define ENTRY(name)	\
+	.type name, @function;	\
+	.globl name;	\
+	.p2align 4;	\
+name:	\
+	cfi_startproc
+#endif
+
+#ifndef END
+# define END(name)	\
+	cfi_endproc;	\
+	.size name, .-name
+#endif
+
+#define CFI_PUSH(REG)	\
+	cfi_adjust_cfa_offset (4);	\
+	cfi_rel_offset (REG, 0)
+
+#define CFI_POP(REG)	\
+	cfi_adjust_cfa_offset (-4);	\
+	cfi_restore (REG)
+
+#define PUSH(REG) pushl REG; CFI_PUSH (REG)
+#define POP(REG) popl REG; CFI_POP (REG)
+
+#define ENTRANCE PUSH(%esi); PUSH(%edi)
+#define RETURN  POP(%edi); POP(%esi); ret; CFI_PUSH(%esi); CFI_PUSH(%edi);
+#define PARMS  4
+#define STR1  PARMS
+#define STR2  STR1+4
+
+	.text
+ENTRY (wcscmp)
+/*
+	* This implementation uses SSE to compare up to 16 bytes at a time.
+*/
+	mov	STR1(%esp), %edx
+	mov	STR2(%esp), %eax
+
+	mov	(%eax), %ecx
+	cmp	%ecx, (%edx)
+	jne	L(neq)
+	test	%ecx, %ecx
+	jz	L(eq)
+
+	mov	4(%eax), %ecx
+	cmp	%ecx, 4(%edx)
+	jne	L(neq)
+	test	%ecx, %ecx
+	jz	L(eq)
+
+	mov	8(%eax), %ecx
+	cmp	%ecx, 8(%edx)
+	jne	L(neq)
+	test	%ecx, %ecx
+	jz	L(eq)
+
+	mov	12(%eax), %ecx
+	cmp	%ecx, 12(%edx)
+	jne	L(neq)
+	test	%ecx, %ecx
+	jz	L(eq)
+
+	ENTRANCE
+	add	$16, %eax
+	add	$16, %edx
+
+	mov	%eax, %esi
+	mov	%edx, %edi
+	pxor	%xmm0, %xmm0		/* clear %xmm0 for null char checks */
+	mov	%al, %ch
+	mov	%dl, %cl
+	and	$63, %eax		/* esi alignment in cache line */
+	and	$63, %edx		/* edi alignment in cache line */
+	and	$15, %cl
+	jz	L(continue_00)
+	cmp	$16, %edx
+	jb	L(continue_0)
+	cmp	$32, %edx
+	jb	L(continue_16)
+	cmp	$48, %edx
+	jb	L(continue_32)
+
+L(continue_48):
+	and	$15, %ch
+	jz	L(continue_48_00)
+	cmp	$16, %eax
+	jb	L(continue_0_48)
+	cmp	$32, %eax
+	jb	L(continue_16_48)
+	cmp	$48, %eax
+	jb	L(continue_32_48)
+
+	.p2align 4
+L(continue_48_48):
+	mov	(%esi), %ecx
+	cmp	%ecx, (%edi)
+	jne	L(nequal)
+	test	%ecx, %ecx
+	jz	L(equal)
+
+	mov	4(%esi), %ecx
+	cmp	%ecx, 4(%edi)
+	jne	L(nequal)
+	test	%ecx, %ecx
+	jz	L(equal)
+
+	mov	8(%esi), %ecx
+	cmp	%ecx, 8(%edi)
+	jne	L(nequal)
+	test	%ecx, %ecx
+	jz	L(equal)
+
+	mov	12(%esi), %ecx
+	cmp	%ecx, 12(%edi)
+	jne	L(nequal)
+	test	%ecx, %ecx
+	jz	L(equal)
+
+	movdqu	16(%edi), %xmm1
+	movdqu	16(%esi), %xmm2
+	pcmpeqd	%xmm1, %xmm0		/* Any null double_word? */
+	pcmpeqd	%xmm2, %xmm1		/* compare first 4 double_words for equality */
+	psubb	%xmm0, %xmm1		/* packed sub of comparison results*/
+	pmovmskb %xmm1, %edx
+	sub	$0xffff, %edx		/* if first 4 double_words are same, edx == 0xffff */
+	jnz	L(less4_double_words_16)
+
+	movdqu	32(%edi), %xmm1
+	movdqu	32(%esi), %xmm2
+	pcmpeqd	%xmm1, %xmm0		/* Any null double_word? */
+	pcmpeqd	%xmm2, %xmm1		/* compare first 4 double_words for equality */
+	psubb	%xmm0, %xmm1		/* packed sub of comparison results*/
+	pmovmskb %xmm1, %edx
+	sub	$0xffff, %edx		/* if first 4 double_words are same, edx == 0xffff */
+	jnz	L(less4_double_words_32)
+
+	movdqu	48(%edi), %xmm1
+	movdqu	48(%esi), %xmm2
+	pcmpeqd	%xmm1, %xmm0		/* Any null double_word? */
+	pcmpeqd	%xmm2, %xmm1		/* compare first 4 double_words for equality */
+	psubb	%xmm0, %xmm1		/* packed sub of comparison results*/
+	pmovmskb %xmm1, %edx
+	sub	$0xffff, %edx		/* if first 4 double_words are same, edx == 0xffff */
+	jnz	L(less4_double_words_48)
+
+	add	$64, %esi
+	add	$64, %edi
+	jmp	L(continue_48_48)
+
+L(continue_0):
+	and	$15, %ch
+	jz	L(continue_0_00)
+	cmp	$16, %eax
+	jb	L(continue_0_0)
+	cmp	$32, %eax
+	jb	L(continue_0_16)
+	cmp	$48, %eax
+	jb	L(continue_0_32)
+
+	.p2align 4
+L(continue_0_48):
+	mov	(%esi), %ecx
+	cmp	%ecx, (%edi)
+	jne	L(nequal)
+	test	%ecx, %ecx
+	jz	L(equal)
+
+	mov	4(%esi), %ecx
+	cmp	%ecx, 4(%edi)
+	jne	L(nequal)
+	test	%ecx, %ecx
+	jz	L(equal)
+
+	mov	8(%esi), %ecx
+	cmp	%ecx, 8(%edi)
+	jne	L(nequal)
+	test	%ecx, %ecx
+	jz	L(equal)
+
+	mov	12(%esi), %ecx
+	cmp	%ecx, 12(%edi)
+	jne	L(nequal)
+	test	%ecx, %ecx
+	jz	L(equal)
+
+	movdqu	16(%edi), %xmm1
+	movdqu	16(%esi), %xmm2
+	pcmpeqd	%xmm1, %xmm0		/* Any null double_word? */
+	pcmpeqd	%xmm2, %xmm1		/* compare first 4 double_words for equality */
+	psubb	%xmm0, %xmm1		/* packed sub of comparison results*/
+	pmovmskb %xmm1, %edx
+	sub	$0xffff, %edx		/* if first 4 double_words are same, edx == 0xffff */
+	jnz	L(less4_double_words_16)
+
+	movdqu	32(%edi), %xmm1
+	movdqu	32(%esi), %xmm2
+	pcmpeqd	%xmm1, %xmm0		/* Any null double_word? */
+	pcmpeqd	%xmm2, %xmm1		/* compare first 4 double_words for equality */
+	psubb	%xmm0, %xmm1		/* packed sub of comparison results*/
+	pmovmskb %xmm1, %edx
+	sub	$0xffff, %edx		/* if first 4 double_words are same, edx == 0xffff */
+	jnz	L(less4_double_words_32)
+
+	mov	48(%esi), %ecx
+	cmp	%ecx, 48(%edi)
+	jne	L(nequal)
+	test	%ecx, %ecx
+	jz	L(equal)
+
+	mov	52(%esi), %ecx
+	cmp	%ecx, 52(%edi)
+	jne	L(nequal)
+	test	%ecx, %ecx
+	jz	L(equal)
+
+	mov	56(%esi), %ecx
+	cmp	%ecx, 56(%edi)
+	jne	L(nequal)
+	test	%ecx, %ecx
+	jz	L(equal)
+
+	mov	60(%esi), %ecx
+	cmp	%ecx, 60(%edi)
+	jne	L(nequal)
+	test	%ecx, %ecx
+	jz	L(equal)
+
+	add	$64, %esi
+	add	$64, %edi
+	jmp	L(continue_0_48)
+
+	.p2align 4
+L(continue_00):
+	and	$15, %ch
+	jz	L(continue_00_00)
+	cmp	$16, %eax
+	jb	L(continue_00_0)
+	cmp	$32, %eax
+	jb	L(continue_00_16)
+	cmp	$48, %eax
+	jb	L(continue_00_32)
+
+	.p2align 4
+L(continue_00_48):
+	pcmpeqd	(%edi), %xmm0
+	mov	(%edi), %eax
+	pmovmskb %xmm0, %ecx
+	test	%ecx, %ecx
+	jnz	L(less4_double_words1)
+
+	cmp	(%esi), %eax
+	jne	L(nequal)
+
+	mov	4(%edi), %eax
+	cmp	4(%esi), %eax
+	jne	L(nequal)
+
+	mov	8(%edi), %eax
+	cmp	8(%esi), %eax
+	jne	L(nequal)
+
+	mov	12(%edi), %eax
+	cmp	12(%esi), %eax
+	jne	L(nequal)
+
+	movdqu	16(%esi), %xmm2
+	pcmpeqd	%xmm2, %xmm0		/* Any null double_word? */
+	pcmpeqd	16(%edi), %xmm2		/* compare first 4 double_words for equality */
+	psubb	%xmm0, %xmm2		/* packed sub of comparison results*/
+	pmovmskb %xmm2, %edx
+	sub	$0xffff, %edx		/* if first 4 double_words are same, edx == 0xffff */
+	jnz	L(less4_double_words_16)
+
+	movdqu	32(%esi), %xmm2
+	pcmpeqd	%xmm2, %xmm0		/* Any null double_word? */
+	pcmpeqd	32(%edi), %xmm2		/* compare first 4 double_words for equality */
+	psubb	%xmm0, %xmm2		/* packed sub of comparison results*/
+	pmovmskb %xmm2, %edx
+	sub	$0xffff, %edx		/* if first 4 double_words are same, edx == 0xffff */
+	jnz	L(less4_double_words_32)
+
+	movdqu	48(%esi), %xmm2
+	pcmpeqd	%xmm2, %xmm0		/* Any null double_word? */
+	pcmpeqd	48(%edi), %xmm2		/* compare first 4 double_words for equality */
+	psubb	%xmm0, %xmm2		/* packed sub of comparison results*/
+	pmovmskb %xmm2, %edx
+	sub	$0xffff, %edx		/* if first 4 double_words are same, edx == 0xffff */
+	jnz	L(less4_double_words_48)
+
+	add	$64, %esi
+	add	$64, %edi
+	jmp	L(continue_00_48)
+
+	.p2align 4
+L(continue_32):
+	and	$15, %ch
+	jz	L(continue_32_00)
+	cmp	$16, %eax
+	jb	L(continue_0_32)
+	cmp	$32, %eax
+	jb	L(continue_16_32)
+	cmp	$48, %eax
+	jb	L(continue_32_32)
+
+	.p2align 4
+L(continue_32_48):
+	mov	(%esi), %ecx
+	cmp	%ecx, (%edi)
+	jne	L(nequal)
+	test	%ecx, %ecx
+	jz	L(equal)
+
+	mov	4(%esi), %ecx
+	cmp	%ecx, 4(%edi)
+	jne	L(nequal)
+	test	%ecx, %ecx
+	jz	L(equal)
+
+	mov	8(%esi), %ecx
+	cmp	%ecx, 8(%edi)
+	jne	L(nequal)
+	test	%ecx, %ecx
+	jz	L(equal)
+
+	mov	12(%esi), %ecx
+	cmp	%ecx, 12(%edi)
+	jne	L(nequal)
+	test	%ecx, %ecx
+	jz	L(equal)
+
+	mov	16(%esi), %ecx
+	cmp	%ecx, 16(%edi)
+	jne	L(nequal)
+	test	%ecx, %ecx
+	jz	L(equal)
+
+	mov	20(%esi), %ecx
+	cmp	%ecx, 20(%edi)
+	jne	L(nequal)
+	test	%ecx, %ecx
+	jz	L(equal)
+
+	mov	24(%esi), %ecx
+	cmp	%ecx, 24(%edi)
+	jne	L(nequal)
+	test	%ecx, %ecx
+	jz	L(equal)
+
+	mov	28(%esi), %ecx
+	cmp	%ecx, 28(%edi)
+	jne	L(nequal)
+	test	%ecx, %ecx
+	jz	L(equal)
+
+	movdqu	32(%edi), %xmm1
+	movdqu	32(%esi), %xmm2
+	pcmpeqd	%xmm1, %xmm0		/* Any null double_word? */
+	pcmpeqd	%xmm2, %xmm1		/* compare first 4 double_words for equality */
+	psubb	%xmm0, %xmm1		/* packed sub of comparison results*/
+	pmovmskb %xmm1, %edx
+	sub	$0xffff, %edx		/* if first 4 double_words are same, edx == 0xffff */
+	jnz	L(less4_double_words_32)
+
+	movdqu	48(%edi), %xmm1
+	movdqu	48(%esi), %xmm2
+	pcmpeqd	%xmm1, %xmm0		/* Any null double_word? */
+	pcmpeqd	%xmm2, %xmm1		/* compare first 4 double_words for equality */
+	psubb	%xmm0, %xmm1		/* packed sub of comparison results*/
+	pmovmskb %xmm1, %edx
+	sub	$0xffff, %edx		/* if first 4 double_words are same, edx == 0xffff */
+	jnz	L(less4_double_words_48)
+
+	add	$64, %esi
+	add	$64, %edi
+	jmp	L(continue_32_48)
+
+	.p2align 4
+L(continue_16):
+	and	$15, %ch
+	jz	L(continue_16_00)
+	cmp	$16, %eax
+	jb	L(continue_0_16)
+	cmp	$32, %eax
+	jb	L(continue_16_16)
+	cmp	$48, %eax
+	jb	L(continue_16_32)
+
+	.p2align 4
+L(continue_16_48):
+	mov	(%esi), %ecx
+	cmp	%ecx, (%edi)
+	jne	L(nequal)
+	test	%ecx, %ecx
+	jz	L(equal)
+
+	mov	4(%esi), %ecx
+	cmp	%ecx, 4(%edi)
+	jne	L(nequal)
+	test	%ecx, %ecx
+	jz	L(equal)
+
+	mov	8(%esi), %ecx
+	cmp	%ecx, 8(%edi)
+	jne	L(nequal)
+	test	%ecx, %ecx
+	jz	L(equal)
+
+	mov	12(%esi), %ecx
+	cmp	%ecx, 12(%edi)
+	jne	L(nequal)
+	test	%ecx, %ecx
+	jz	L(equal)
+
+	movdqu	16(%edi), %xmm1
+	movdqu	16(%esi), %xmm2
+	pcmpeqd	%xmm1, %xmm0		/* Any null double_word? */
+	pcmpeqd	%xmm2, %xmm1		/* compare first 4 double_words for equality */
+	psubb	%xmm0, %xmm1		/* packed sub of comparison results*/
+	pmovmskb %xmm1, %edx
+	sub	$0xffff, %edx		/* if first 4 double_words are same, edx == 0xffff */
+	jnz	L(less4_double_words_16)
+
+	mov	32(%esi), %ecx
+	cmp	%ecx, 32(%edi)
+	jne	L(nequal)
+	test	%ecx, %ecx
+	jz	L(equal)
+
+	mov	36(%esi), %ecx
+	cmp	%ecx, 36(%edi)
+	jne	L(nequal)
+	test	%ecx, %ecx
+	jz	L(equal)
+
+	mov	40(%esi), %ecx
+	cmp	%ecx, 40(%edi)
+	jne	L(nequal)
+	test	%ecx, %ecx
+	jz	L(equal)
+
+	mov	44(%esi), %ecx
+	cmp	%ecx, 44(%edi)
+	jne	L(nequal)
+	test	%ecx, %ecx
+	jz	L(equal)
+
+	movdqu	48(%edi), %xmm1
+	movdqu	48(%esi), %xmm2
+	pcmpeqd	%xmm1, %xmm0		/* Any null double_word? */
+	pcmpeqd	%xmm2, %xmm1		/* compare first 4 double_words for equality */
+	psubb	%xmm0, %xmm1		/* packed sub of comparison results*/
+	pmovmskb %xmm1, %edx
+	sub	$0xffff, %edx		/* if first 4 double_words are same, edx == 0xffff */
+	jnz	L(less4_double_words_48)
+
+	add	$64, %esi
+	add	$64, %edi
+	jmp	L(continue_16_48)
+
+	.p2align 4
+L(continue_00_00):
+	movdqa	(%edi), %xmm1
+	pcmpeqd	%xmm1, %xmm0		/* Any null double_word? */
+	pcmpeqd	(%esi), %xmm1		/* compare first 4 double_words for equality */
+	psubb	%xmm0, %xmm1		/* packed sub of comparison results*/
+	pmovmskb %xmm1, %edx
+	sub	$0xffff, %edx		/* if first 4 double_words are same, edx == 0xffff */
+	jnz	L(less4_double_words)
+
+	movdqa	16(%edi), %xmm3
+	pcmpeqd	%xmm3, %xmm0		/* Any null double_word? */
+	pcmpeqd	16(%esi), %xmm3		/* compare first 4 double_words for equality */
+	psubb	%xmm0, %xmm3		/* packed sub of comparison results*/
+	pmovmskb %xmm3, %edx
+	sub	$0xffff, %edx		/* if first 4 double_words are same, edx == 0xffff */
+	jnz	L(less4_double_words_16)
+
+	movdqa	32(%edi), %xmm5
+	pcmpeqd	%xmm5, %xmm0		/* Any null double_word? */
+	pcmpeqd	32(%esi), %xmm5		/* compare first 4 double_words for equality */
+	psubb	%xmm0, %xmm5		/* packed sub of comparison results*/
+	pmovmskb %xmm5, %edx
+	sub	$0xffff, %edx		/* if first 4 double_words are same, edx == 0xffff */
+	jnz	L(less4_double_words_32)
+
+	movdqa	48(%edi), %xmm1
+	pcmpeqd	%xmm1, %xmm0		/* Any null double_word? */
+	pcmpeqd	48(%esi), %xmm1		/* compare first 4 double_words for equality */
+	psubb	%xmm0, %xmm1		/* packed sub of comparison results*/
+	pmovmskb %xmm1, %edx
+	sub	$0xffff, %edx		/* if first 4 double_words are same, edx == 0xffff */
+	jnz	L(less4_double_words_48)
+
+	add	$64, %esi
+	add	$64, %edi
+	jmp	L(continue_00_00)
+
+	.p2align 4
+L(continue_00_32):
+	movdqu	(%esi), %xmm2
+	pcmpeqd	%xmm2, %xmm0		/* Any null double_word? */
+	pcmpeqd	(%edi), %xmm2		/* compare first 4 double_words for equality */
+	psubb	%xmm0, %xmm2		/* packed sub of comparison results*/
+	pmovmskb %xmm2, %edx
+	sub	$0xffff, %edx		/* if first 4 double_words are same, edx == 0xffff */
+	jnz	L(less4_double_words)
+
+	add	$16, %esi
+	add	$16, %edi
+	jmp	L(continue_00_48)
+
+	.p2align 4
+L(continue_00_16):
+	movdqu	(%esi), %xmm2
+	pcmpeqd	%xmm2, %xmm0		/* Any null double_word? */
+	pcmpeqd	(%edi), %xmm2		/* compare first 4 double_words for equality */
+	psubb	%xmm0, %xmm2		/* packed sub of comparison results*/
+	pmovmskb %xmm2, %edx
+	sub	$0xffff, %edx		/* if first 4 double_words are same, edx == 0xffff */
+	jnz	L(less4_double_words)
+
+	movdqu	16(%esi), %xmm2
+	pcmpeqd	%xmm2, %xmm0		/* Any null double_word? */
+	pcmpeqd	16(%edi), %xmm2		/* compare first 4 double_words for equality */
+	psubb	%xmm0, %xmm2		/* packed sub of comparison results*/
+	pmovmskb %xmm2, %edx
+	sub	$0xffff, %edx		/* if first 4 double_words are same, edx == 0xffff */
+	jnz	L(less4_double_words_16)
+
+	add	$32, %esi
+	add	$32, %edi
+	jmp	L(continue_00_48)
+
+	.p2align 4
+L(continue_00_0):
+	movdqu	(%esi), %xmm2
+	pcmpeqd	%xmm2, %xmm0		/* Any null double_word? */
+	pcmpeqd	(%edi), %xmm2		/* compare first 4 double_words for equality */
+	psubb	%xmm0, %xmm2		/* packed sub of comparison results*/
+	pmovmskb %xmm2, %edx
+	sub	$0xffff, %edx		/* if first 4 double_words are same, edx == 0xffff */
+	jnz	L(less4_double_words)
+
+	movdqu	16(%esi), %xmm2
+	pcmpeqd	%xmm2, %xmm0		/* Any null double_word? */
+	pcmpeqd	16(%edi), %xmm2		/* compare first 4 double_words for equality */
+	psubb	%xmm0, %xmm2		/* packed sub of comparison results*/
+	pmovmskb %xmm2, %edx
+	sub	$0xffff, %edx		/* if first 4 double_words are same, edx == 0xffff */
+	jnz	L(less4_double_words_16)
+
+	movdqu	32(%esi), %xmm2
+	pcmpeqd	%xmm2, %xmm0		/* Any null double_word? */
+	pcmpeqd	32(%edi), %xmm2		/* compare first 4 double_words for equality */
+	psubb	%xmm0, %xmm2		/* packed sub of comparison results*/
+	pmovmskb %xmm2, %edx
+	sub	$0xffff, %edx		/* if first 4 double_words are same, edx == 0xffff */
+	jnz	L(less4_double_words_32)
+
+	add	$48, %esi
+	add	$48, %edi
+	jmp	L(continue_00_48)
+
+	.p2align 4
+L(continue_48_00):
+	pcmpeqd	(%esi), %xmm0
+	mov	(%edi), %eax
+	pmovmskb %xmm0, %ecx
+	test	%ecx, %ecx
+	jnz	L(less4_double_words1)
+
+	cmp	(%esi), %eax
+	jne	L(nequal)
+
+	mov	4(%edi), %eax
+	cmp	4(%esi), %eax
+	jne	L(nequal)
+
+	mov	8(%edi), %eax
+	cmp	8(%esi), %eax
+	jne	L(nequal)
+
+	mov	12(%edi), %eax
+	cmp	12(%esi), %eax
+	jne	L(nequal)
+
+	movdqu	16(%edi), %xmm1
+	pcmpeqd	%xmm1, %xmm0		/* Any null double_word? */
+	pcmpeqd	16(%esi), %xmm1		/* compare first 4 double_words for equality */
+	psubb	%xmm0, %xmm1		/* packed sub of comparison results*/
+	pmovmskb %xmm1, %edx
+	sub	$0xffff, %edx		/* if first 4 double_words are same, edx == 0xffff */
+	jnz	L(less4_double_words_16)
+
+	movdqu	32(%edi), %xmm1
+	pcmpeqd	%xmm1, %xmm0		/* Any null double_word? */
+	pcmpeqd	32(%esi), %xmm1		/* compare first 4 double_words for equality */
+	psubb	%xmm0, %xmm1		/* packed sub of comparison results*/
+	pmovmskb %xmm1, %edx
+	sub	$0xffff, %edx		/* if first 4 double_words are same, edx == 0xffff */
+	jnz	L(less4_double_words_32)
+
+	movdqu	48(%edi), %xmm1
+	pcmpeqd	%xmm1, %xmm0		/* Any null double_word? */
+	pcmpeqd	48(%esi), %xmm1		/* compare first 4 double_words for equality */
+	psubb	%xmm0, %xmm1		/* packed sub of comparison results*/
+	pmovmskb %xmm1, %edx
+	sub	$0xffff, %edx		/* if first 4 double_words are same, edx == 0xffff */
+	jnz	L(less4_double_words_48)
+
+	add	$64, %esi
+	add	$64, %edi
+	jmp	L(continue_48_00)
+
+	.p2align 4
+L(continue_32_00):
+	movdqu	(%edi), %xmm1
+	pcmpeqd	%xmm1, %xmm0		/* Any null double_word? */
+	pcmpeqd	(%esi), %xmm1		/* compare first 4 double_words for equality */
+	psubb	%xmm0, %xmm1		/* packed sub of comparison results*/
+	pmovmskb %xmm1, %edx
+	sub	$0xffff, %edx		/* if first 4 double_words are same, edx == 0xffff */
+	jnz	L(less4_double_words)
+
+	add	$16, %esi
+	add	$16, %edi
+	jmp	L(continue_48_00)
+
+	.p2align 4
+L(continue_16_00):
+	movdqu	(%edi), %xmm1
+	pcmpeqd	%xmm1, %xmm0		/* Any null double_word? */
+	pcmpeqd	(%esi), %xmm1		/* compare first 4 double_words for equality */
+	psubb	%xmm0, %xmm1		/* packed sub of comparison results*/
+	pmovmskb %xmm1, %edx
+	sub	$0xffff, %edx		/* if first 4 double_words are same, edx == 0xffff */
+	jnz	L(less4_double_words)
+
+	movdqu	16(%edi), %xmm1
+	pcmpeqd	%xmm1, %xmm0		/* Any null double_word? */
+	pcmpeqd	16(%esi), %xmm1		/* compare first 4 double_words for equality */
+	psubb	%xmm0, %xmm1		/* packed sub of comparison results*/
+	pmovmskb %xmm1, %edx
+	sub	$0xffff, %edx		/* if first 4 double_words are same, edx == 0xffff */
+	jnz	L(less4_double_words_16)
+
+	add	$32, %esi
+	add	$32, %edi
+	jmp	L(continue_48_00)
+
+	.p2align 4
+L(continue_0_00):
+	movdqu	(%edi), %xmm1
+	pcmpeqd	%xmm1, %xmm0		/* Any null double_word? */
+	pcmpeqd	(%esi), %xmm1		/* compare first 4 double_words for equality */
+	psubb	%xmm0, %xmm1		/* packed sub of comparison results*/
+	pmovmskb %xmm1, %edx
+	sub	$0xffff, %edx		/* if first 4 double_words are same, edx == 0xffff */
+	jnz	L(less4_double_words)
+
+	movdqu	16(%edi), %xmm1
+	pcmpeqd	%xmm1, %xmm0		/* Any null double_word? */
+	pcmpeqd	16(%esi), %xmm1		/* compare first 4 double_words for equality */
+	psubb	%xmm0, %xmm1		/* packed sub of comparison results*/
+	pmovmskb %xmm1, %edx
+	sub	$0xffff, %edx		/* if first 4 double_words are same, edx == 0xffff */
+	jnz	L(less4_double_words_16)
+
+	movdqu	32(%edi), %xmm1
+	pcmpeqd	%xmm1, %xmm0		/* Any null double_word? */
+	pcmpeqd	32(%esi), %xmm1		/* compare first 4 double_words for equality */
+	psubb	%xmm0, %xmm1		/* packed sub of comparison results*/
+	pmovmskb %xmm1, %edx
+	sub	$0xffff, %edx		/* if first 4 double_words are same, edx == 0xffff */
+	jnz	L(less4_double_words_32)
+
+	add	$48, %esi
+	add	$48, %edi
+	jmp	L(continue_48_00)
+
+	.p2align 4
+L(continue_32_32):
+	movdqu	(%edi), %xmm1
+	movdqu	(%esi), %xmm2
+	pcmpeqd	%xmm1, %xmm0		/* Any null double_word? */
+	pcmpeqd	%xmm2, %xmm1		/* compare first 4 double_words for equality */
+	psubb	%xmm0, %xmm1		/* packed sub of comparison results*/
+	pmovmskb %xmm1, %edx
+	sub	$0xffff, %edx		/* if first 4 double_words are same, edx == 0xffff */
+	jnz	L(less4_double_words)
+
+	add	$16, %esi
+	add	$16, %edi
+	jmp	L(continue_48_48)
+
+	.p2align 4
+L(continue_16_16):
+	movdqu	(%edi), %xmm1
+	movdqu	(%esi), %xmm2
+	pcmpeqd	%xmm1, %xmm0		/* Any null double_word? */
+	pcmpeqd	%xmm2, %xmm1		/* compare first 4 double_words for equality */
+	psubb	%xmm0, %xmm1		/* packed sub of comparison results*/
+	pmovmskb %xmm1, %edx
+	sub	$0xffff, %edx		/* if first 4 double_words are same, edx == 0xffff */
+	jnz	L(less4_double_words)
+
+	movdqu	16(%edi), %xmm3
+	movdqu	16(%esi), %xmm4
+	pcmpeqd	%xmm3, %xmm0		/* Any null double_word? */
+	pcmpeqd	%xmm4, %xmm3		/* compare first 4 double_words for equality */
+	psubb	%xmm0, %xmm3		/* packed sub of comparison results*/
+	pmovmskb %xmm3, %edx
+	sub	$0xffff, %edx		/* if first 4 double_words are same, edx == 0xffff */
+	jnz	L(less4_double_words_16)
+
+	add	$32, %esi
+	add	$32, %edi
+	jmp	L(continue_48_48)
+
+	.p2align 4
+L(continue_0_0):
+	movdqu	(%edi), %xmm1
+	movdqu	(%esi), %xmm2
+	pcmpeqd	%xmm1, %xmm0		/* Any null double_word? */
+	pcmpeqd	%xmm2, %xmm1		/* compare first 4 double_words for equality */
+	psubb	%xmm0, %xmm1		/* packed sub of comparison results*/
+	pmovmskb %xmm1, %edx
+	sub	$0xffff, %edx		/* if first 4 double_words are same, edx == 0xffff */
+	jnz	L(less4_double_words)
+
+	movdqu	16(%edi), %xmm3
+	movdqu	16(%esi), %xmm4
+	pcmpeqd	%xmm3, %xmm0		/* Any null double_word? */
+	pcmpeqd	%xmm4, %xmm3		/* compare first 4 double_words for equality */
+	psubb	%xmm0, %xmm3		/* packed sub of comparison results*/
+	pmovmskb %xmm3, %edx
+	sub	$0xffff, %edx		/* if first 4 double_words are same, edx == 0xffff */
+	jnz	L(less4_double_words_16)
+
+	movdqu	32(%edi), %xmm1
+	movdqu	32(%esi), %xmm2
+	pcmpeqd	%xmm1, %xmm0		/* Any null double_word? */
+	pcmpeqd	%xmm2, %xmm1		/* compare first 4 double_words for equality */
+	psubb	%xmm0, %xmm1		/* packed sub of comparison results*/
+	pmovmskb %xmm1, %edx
+	sub	$0xffff, %edx		/* if first 4 double_words are same, edx == 0xffff */
+	jnz	L(less4_double_words_32)
+
+	add	$48, %esi
+	add	$48, %edi
+	jmp	L(continue_48_48)
+
+	.p2align 4
+L(continue_0_16):
+	movdqu	(%edi), %xmm1
+	movdqu	(%esi), %xmm2
+	pcmpeqd	%xmm1, %xmm0		/* Any null double_word? */
+	pcmpeqd	%xmm2, %xmm1		/* compare first 4 double_words for equality */
+	psubb	%xmm0, %xmm1		/* packed sub of comparison results*/
+	pmovmskb %xmm1, %edx
+	sub	$0xffff, %edx		/* if first 4 double_words are same, edx == 0xffff */
+	jnz	L(less4_double_words)
+
+	movdqu	16(%edi), %xmm1
+	movdqu	16(%esi), %xmm2
+	pcmpeqd	%xmm1, %xmm0		/* Any null double_word? */
+	pcmpeqd	%xmm2, %xmm1		/* compare first 4 double_words for equality */
+	psubb	%xmm0, %xmm1		/* packed sub of comparison results*/
+	pmovmskb %xmm1, %edx
+	sub	$0xffff, %edx		/* if first 4 double_words are same, edx == 0xffff */
+	jnz	L(less4_double_words_16)
+
+	add	$32, %esi
+	add	$32, %edi
+	jmp	L(continue_32_48)
+
+	.p2align 4
+L(continue_0_32):
+	movdqu	(%edi), %xmm1
+	movdqu	(%esi), %xmm2
+	pcmpeqd	%xmm1, %xmm0		/* Any null double_word? */
+	pcmpeqd	%xmm2, %xmm1		/* compare first 4 double_words for equality */
+	psubb	%xmm0, %xmm1		/* packed sub of comparison results*/
+	pmovmskb %xmm1, %edx
+	sub	$0xffff, %edx		/* if first 4 double_words are same, edx == 0xffff */
+	jnz	L(less4_double_words)
+
+	add	$16, %esi
+	add	$16, %edi
+	jmp	L(continue_16_48)
+
+	.p2align 4
+L(continue_16_32):
+	movdqu	(%edi), %xmm1
+	movdqu	(%esi), %xmm2
+	pcmpeqd	%xmm1, %xmm0		/* Any null double_word? */
+	pcmpeqd	%xmm2, %xmm1		/* compare first 4 double_words for equality */
+	psubb	%xmm0, %xmm1		/* packed sub of comparison results*/
+	pmovmskb %xmm1, %edx
+	sub	$0xffff, %edx		/* if first 4 double_words are same, edx == 0xffff */
+	jnz	L(less4_double_words)
+
+	add	$16, %esi
+	add	$16, %edi
+	jmp	L(continue_32_48)
+
+	.p2align 4
+L(less4_double_words1):
+	cmp	(%esi), %eax
+	jne	L(nequal)
+	test	%eax, %eax
+	jz	L(equal)
+
+	mov	4(%esi), %ecx
+	cmp	%ecx, 4(%edi)
+	jne	L(nequal)
+	test	%ecx, %ecx
+	jz	L(equal)
+
+	mov	8(%esi), %ecx
+	cmp	%ecx, 8(%edi)
+	jne	L(nequal)
+	test	%ecx, %ecx
+	jz	L(equal)
+
+	mov	12(%esi), %ecx
+	cmp	%ecx, 12(%edi)
+	jne	L(nequal)
+	xor	%eax, %eax
+	RETURN
+
+	.p2align 4
+L(less4_double_words):
+	xor	%eax, %eax
+	test	%dl, %dl
+	jz	L(next_two_double_words)
+	and	$15, %dl
+	jz	L(second_double_word)
+	mov	(%esi), %ecx
+	cmp	%ecx, (%edi)
+	jne	L(nequal)
+	RETURN
+
+	.p2align 4
+L(second_double_word):
+	mov	4(%esi), %ecx
+	cmp	%ecx, 4(%edi)
+	jne	L(nequal)
+	RETURN
+
+	.p2align 4
+L(next_two_double_words):
+	and	$15, %dh
+	jz	L(fourth_double_word)
+	mov	8(%esi), %ecx
+	cmp	%ecx, 8(%edi)
+	jne	L(nequal)
+	RETURN
+
+	.p2align 4
+L(fourth_double_word):
+	mov	12(%esi), %ecx
+	cmp	%ecx, 12(%edi)
+	jne	L(nequal)
+	RETURN
+
+	.p2align 4
+L(less4_double_words_16):
+	xor	%eax, %eax
+	test	%dl, %dl
+	jz	L(next_two_double_words_16)
+	and	$15, %dl
+	jz	L(second_double_word_16)
+	mov	16(%esi), %ecx
+	cmp	%ecx, 16(%edi)
+	jne	L(nequal)
+	RETURN
+
+	.p2align 4
+L(second_double_word_16):
+	mov	20(%esi), %ecx
+	cmp	%ecx, 20(%edi)
+	jne	L(nequal)
+	RETURN
+
+	.p2align 4
+L(next_two_double_words_16):
+	and	$15, %dh
+	jz	L(fourth_double_word_16)
+	mov	24(%esi), %ecx
+	cmp	%ecx, 24(%edi)
+	jne	L(nequal)
+	RETURN
+
+	.p2align 4
+L(fourth_double_word_16):
+	mov	28(%esi), %ecx
+	cmp	%ecx, 28(%edi)
+	jne	L(nequal)
+	RETURN
+
+	.p2align 4
+L(less4_double_words_32):
+	xor	%eax, %eax
+	test	%dl, %dl
+	jz	L(next_two_double_words_32)
+	and	$15, %dl
+	jz	L(second_double_word_32)
+	mov	32(%esi), %ecx
+	cmp	%ecx, 32(%edi)
+	jne	L(nequal)
+	RETURN
+
+	.p2align 4
+L(second_double_word_32):
+	mov	36(%esi), %ecx
+	cmp	%ecx, 36(%edi)
+	jne	L(nequal)
+	RETURN
+
+	.p2align 4
+L(next_two_double_words_32):
+	and	$15, %dh
+	jz	L(fourth_double_word_32)
+	mov	40(%esi), %ecx
+	cmp	%ecx, 40(%edi)
+	jne	L(nequal)
+	RETURN
+
+	.p2align 4
+L(fourth_double_word_32):
+	mov	44(%esi), %ecx
+	cmp	%ecx, 44(%edi)
+	jne	L(nequal)
+	RETURN
+
+	.p2align 4
+L(less4_double_words_48):
+	xor	%eax, %eax
+	test	%dl, %dl
+	jz	L(next_two_double_words_48)
+	and	$15, %dl
+	jz	L(second_double_word_48)
+	mov	48(%esi), %ecx
+	cmp	%ecx, 48(%edi)
+	jne	L(nequal)
+	RETURN
+
+	.p2align 4
+L(second_double_word_48):
+	mov	52(%esi), %ecx
+	cmp	%ecx, 52(%edi)
+	jne	L(nequal)
+	RETURN
+
+	.p2align 4
+L(next_two_double_words_48):
+	and	$15, %dh
+	jz	L(fourth_double_word_48)
+	mov	56(%esi), %ecx
+	cmp	%ecx, 56(%edi)
+	jne	L(nequal)
+	RETURN
+
+	.p2align 4
+L(fourth_double_word_48):
+	mov	60(%esi), %ecx
+	cmp	%ecx, 60(%edi)
+	jne	L(nequal)
+	RETURN
+
+	.p2align 4
+L(nequal):
+	mov	$1, %eax
+	jg	L(return)
+	neg	%eax
+	RETURN
+
+	.p2align 4
+L(return):
+	RETURN
+
+	.p2align 4
+L(equal):
+	xorl	%eax, %eax
+	RETURN
+
+	CFI_POP (%edi)
+	CFI_POP (%esi)
+
+	.p2align 4
+L(neq):
+	mov	$1, %eax
+	jg	L(neq_bigger)
+	neg	%eax
+
+L(neq_bigger):
+	ret
+
+	.p2align 4
+L(eq):
+	xorl	%eax, %eax
+	ret
+
+END (wcscmp)
+