glibc/sysdeps/i386/i686/multiarch/wcscmp-sse2.S

/* wcscmp with SSE2
   Copyright (C) 2011-2022 Free Software Foundation, Inc.
   This file is part of the GNU C Library.

   The GNU C Library is free software; you can redistribute it and/or
   modify it under the terms of the GNU Lesser General Public
   License as published by the Free Software Foundation; either
   version 2.1 of the License, or (at your option) any later version.

   The GNU C Library is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
   Lesser General Public License for more details.

   You should have received a copy of the GNU Lesser General Public
   License along with the GNU C Library; if not, see
   <https://www.gnu.org/licenses/>.  */

#if IS_IN (libc)

# include <sysdep.h>

# 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

/* Note: wcscmp uses signed comparison, not unsugned as in strcmp function. */

	.text
ENTRY (__wcscmp_sse2)
/*
	* 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_sse2)
#endif