xref: /aosp_15_r20/bionic/libc/arch-x86/string/sse4-memcmp-slm.S (revision 8d67ca893c1523eb926b9080dbe4e2ffd2a27ba1)

/*
Copyright (c) 2014, 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 cfi_remember_state
# define cfi_remember_state	.cfi_remember_state
#endif

#ifndef cfi_restore_state
# define cfi_restore_state	.cfi_restore_state
#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

#ifndef MEMCMP
# define MEMCMP	memcmp_sse4
#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 PARMS	4
#define BLK1	PARMS
#define BLK2	BLK1 + 4
#define LEN	BLK2 + 4
#define RETURN	POP (%ebx); ret; CFI_PUSH (%ebx)


#if (defined SHARED || defined __PIC__)
# define JMPTBL(I, B)	I - B

/* Load an entry in a jump table into EBX and branch to it.  TABLE is a
	jump	table with relative offsets.  INDEX is a register contains the
	index	into the jump table.   SCALE is the scale of INDEX. */

# define BRANCH_TO_JMPTBL_ENTRY(TABLE, INDEX, SCALE)	\
/* We first load PC into EBX.  */	\
	call	__x86.get_pc_thunk.bx;	\
/* Get the address of the jump table.  */	\
	addl	$(TABLE - .), %ebx;	\
/* Get the entry and convert the relative offset to the	\
	absolute	address.  */	\
	addl	(%ebx,INDEX,SCALE), %ebx;	\
/* We loaded the jump table and adjuested EDX/ESI. Go.  */	\
	jmp	*%ebx
#else
# define JMPTBL(I, B)	I

/* Load an entry in a jump table into EBX and branch to it.  TABLE is a
	jump	table with relative offsets.  INDEX is a register contains the
	index	into the jump table.   SCALE is the scale of INDEX. */
# define BRANCH_TO_JMPTBL_ENTRY(TABLE, INDEX, SCALE)	\
	jmp	*TABLE(,INDEX,SCALE)
#endif


/* Warning!
           wmemcmp has to use SIGNED comparison for elements.
           memcmp has to use UNSIGNED comparison for elemnts.
*/

	.section .text.sse4.2,"ax",@progbits
ENTRY (MEMCMP)
	movl	BLK1(%esp), %eax
	movl	BLK2(%esp), %edx
	movl	LEN(%esp), %ecx

#ifdef USE_AS_WMEMCMP
	shl	$2, %ecx
	test	%ecx, %ecx
	jz	L(return0)
#else
	cmp	$1, %ecx
	jbe	L(less1bytes)
#endif

	pxor	%xmm0, %xmm0
	cmp	$64, %ecx
	ja	L(64bytesormore)
	cmp	$8, %ecx

#ifndef USE_AS_WMEMCMP
	PUSH	(%ebx)
	jb	L(less8bytes)
#else
	jb	L(less8bytes)
	PUSH	(%ebx)
#endif

	add	%ecx, %edx
	add	%ecx, %eax
	BRANCH_TO_JMPTBL_ENTRY(L(table_64bytes), %ecx, 4)

#ifndef USE_AS_WMEMCMP
	.p2align 4
L(less8bytes):
	mov	(%eax), %bl
	cmpb	(%edx), %bl
	jne	L(nonzero)

	mov	1(%eax), %bl
	cmpb	1(%edx), %bl
	jne	L(nonzero)

	cmp	$2, %ecx
	jz	L(0bytes)

	mov	2(%eax), %bl
	cmpb	2(%edx), %bl
	jne	L(nonzero)

	cmp	$3, %ecx
	jz	L(0bytes)

	mov	3(%eax), %bl
	cmpb	3(%edx), %bl
	jne	L(nonzero)

	cmp	$4, %ecx
	jz	L(0bytes)

	mov	4(%eax), %bl
	cmpb	4(%edx), %bl
	jne	L(nonzero)

	cmp	$5, %ecx
	jz	L(0bytes)

	mov	5(%eax), %bl
	cmpb	5(%edx), %bl
	jne	L(nonzero)

	cmp	$6, %ecx
	jz	L(0bytes)

	mov	6(%eax), %bl
	cmpb	6(%edx), %bl
	je	L(0bytes)

L(nonzero):
	POP	(%ebx)
	mov	$1, %eax
	ja	L(above)
	neg	%eax
L(above):
	ret
	CFI_PUSH (%ebx)
#endif

	.p2align 4
L(0bytes):
	POP	(%ebx)
	xor	%eax, %eax
	ret

#ifdef USE_AS_WMEMCMP

/* for wmemcmp, case N == 1 */

	.p2align 4
L(less8bytes):
	mov	(%eax), %ecx
	cmp	(%edx), %ecx
	je	L(return0)
	mov	$1, %eax
	jg	L(find_diff_bigger)
	neg	%eax
	ret

	.p2align 4
L(find_diff_bigger):
	ret

	.p2align 4
L(return0):
	xor	%eax, %eax
	ret
#endif

#ifndef USE_AS_WMEMCMP
	.p2align 4
L(less1bytes):
	jb	L(0bytesend)
	movzbl	(%eax), %eax
	movzbl	(%edx), %edx
	sub	%edx, %eax
	ret

	.p2align 4
L(0bytesend):
	xor	%eax, %eax
	ret
#endif
	.p2align 4
L(64bytesormore):
	PUSH	(%ebx)
	mov	%ecx, %ebx
	mov	$64, %ecx
	sub	$64, %ebx
L(64bytesormore_loop):
	movdqu	(%eax), %xmm1
	movdqu	(%edx), %xmm2
	pxor	%xmm1, %xmm2
	ptest	%xmm2, %xmm0
	jnc	L(find_16diff)

	movdqu	16(%eax), %xmm1
	movdqu	16(%edx), %xmm2
	pxor	%xmm1, %xmm2
	ptest	%xmm2, %xmm0
	jnc	L(find_32diff)

	movdqu	32(%eax), %xmm1
	movdqu	32(%edx), %xmm2
	pxor	%xmm1, %xmm2
	ptest	%xmm2, %xmm0
	jnc	L(find_48diff)

	movdqu	48(%eax), %xmm1
	movdqu	48(%edx), %xmm2
	pxor	%xmm1, %xmm2
	ptest	%xmm2, %xmm0
	jnc	L(find_64diff)
	add	%ecx, %eax
	add	%ecx, %edx
	sub	%ecx, %ebx
	jae	L(64bytesormore_loop)
	add	%ebx, %ecx
	add	%ecx, %edx
	add	%ecx, %eax
	BRANCH_TO_JMPTBL_ENTRY(L(table_64bytes), %ecx, 4)

#ifdef USE_AS_WMEMCMP

/* Label needs only for table_64bytes filling */
L(unreal_case):
/* no code here */

#endif
	.p2align 4
L(find_16diff):
	sub	$16, %ecx
L(find_32diff):
	sub	$16, %ecx
L(find_48diff):
	sub	$16, %ecx
L(find_64diff):
	add	%ecx, %edx
	add	%ecx, %eax

#ifndef USE_AS_WMEMCMP
	.p2align 4
L(16bytes):
	mov	-16(%eax), %ecx
	mov	-16(%edx), %ebx
	cmp	%ebx, %ecx
	jne	L(find_diff)
L(12bytes):
	mov	-12(%eax), %ecx
	mov	-12(%edx), %ebx
	cmp	%ebx, %ecx
	jne	L(find_diff)
L(8bytes):
	mov	-8(%eax), %ecx
	mov	-8(%edx), %ebx
	cmp	%ebx, %ecx
	jne	L(find_diff)
L(4bytes):
	mov	-4(%eax), %ecx
	mov	-4(%edx), %ebx
	cmp	%ebx, %ecx
	mov	$0, %eax
	jne	L(find_diff)
	RETURN
#else
	.p2align 4
L(16bytes):
	mov	-16(%eax), %ecx
	cmp	-16(%edx), %ecx
	jne	L(find_diff)
L(12bytes):
	mov	-12(%eax), %ecx
	cmp	-12(%edx), %ecx
	jne	L(find_diff)
L(8bytes):
	mov	-8(%eax), %ecx
	cmp	-8(%edx), %ecx
	jne	L(find_diff)
L(4bytes):
	mov	-4(%eax), %ecx
	cmp	-4(%edx), %ecx
	mov	$0, %eax
	jne	L(find_diff)
	RETURN
#endif

#ifndef USE_AS_WMEMCMP
	.p2align 4
L(49bytes):
	movdqu	-49(%eax), %xmm1
	movdqu	-49(%edx), %xmm2
	mov	$-49, %ebx
	pxor	%xmm1, %xmm2
	ptest	%xmm2, %xmm0
	jnc	L(less16bytes)
L(33bytes):
	movdqu	-33(%eax), %xmm1
	movdqu	-33(%edx), %xmm2
	mov	$-33, %ebx
	pxor	%xmm1, %xmm2
	ptest	%xmm2, %xmm0
	jnc	L(less16bytes)
L(17bytes):
	mov	-17(%eax), %ecx
	mov	-17(%edx), %ebx
	cmp	%ebx, %ecx
	jne	L(find_diff)
L(13bytes):
	mov	-13(%eax), %ecx
	mov	-13(%edx), %ebx
	cmp	%ebx, %ecx
	jne	L(find_diff)
L(9bytes):
	mov	-9(%eax), %ecx
	mov	-9(%edx), %ebx
	cmp	%ebx, %ecx
	jne	L(find_diff)
L(5bytes):
	mov	-5(%eax), %ecx
	mov	-5(%edx), %ebx
	cmp	%ebx, %ecx
	jne	L(find_diff)
	movzbl	-1(%eax), %ecx
	cmp	-1(%edx), %cl
	mov	$0, %eax
	jne	L(end)
	RETURN

	.p2align 4
L(50bytes):
	mov	$-50, %ebx
	movdqu	-50(%eax), %xmm1
	movdqu	-50(%edx), %xmm2
	pxor	%xmm1, %xmm2
	ptest	%xmm2, %xmm0
	jnc	L(less16bytes)
L(34bytes):
	mov	$-34, %ebx
	movdqu	-34(%eax), %xmm1
	movdqu	-34(%edx), %xmm2
	pxor	%xmm1, %xmm2
	ptest	%xmm2, %xmm0
	jnc	L(less16bytes)
L(18bytes):
	mov	-18(%eax), %ecx
	mov	-18(%edx), %ebx
	cmp	%ebx, %ecx
	jne	L(find_diff)
L(14bytes):
	mov	-14(%eax), %ecx
	mov	-14(%edx), %ebx
	cmp	%ebx, %ecx
	jne	L(find_diff)
L(10bytes):
	mov	-10(%eax), %ecx
	mov	-10(%edx), %ebx
	cmp	%ebx, %ecx
	jne	L(find_diff)
L(6bytes):
	mov	-6(%eax), %ecx
	mov	-6(%edx), %ebx
	cmp	%ebx, %ecx
	jne	L(find_diff)
L(2bytes):
	movzwl	-2(%eax), %ecx
	movzwl	-2(%edx), %ebx
	cmp	%bl, %cl
	jne	L(end)
	cmp	%bh, %ch
	mov	$0, %eax
	jne	L(end)
	RETURN

	.p2align 4
L(51bytes):
	mov	$-51, %ebx
	movdqu	-51(%eax), %xmm1
	movdqu	-51(%edx), %xmm2
	pxor	%xmm1, %xmm2
	ptest	%xmm2, %xmm0
	jnc	L(less16bytes)
L(35bytes):
	mov	$-35, %ebx
	movdqu	-35(%eax), %xmm1
	movdqu	-35(%edx), %xmm2
	pxor	%xmm1, %xmm2
	ptest	%xmm2, %xmm0
	jnc	L(less16bytes)
L(19bytes):
	movl	-19(%eax), %ecx
	movl	-19(%edx), %ebx
	cmp	%ebx, %ecx
	jne	L(find_diff)
L(15bytes):
	movl	-15(%eax), %ecx
	movl	-15(%edx), %ebx
	cmp	%ebx, %ecx
	jne	L(find_diff)
L(11bytes):
	movl	-11(%eax), %ecx
	movl	-11(%edx), %ebx
	cmp	%ebx, %ecx
	jne	L(find_diff)
L(7bytes):
	movl	-7(%eax), %ecx
	movl	-7(%edx), %ebx
	cmp	%ebx, %ecx
	jne	L(find_diff)
L(3bytes):
	movzwl	-3(%eax), %ecx
	movzwl	-3(%edx), %ebx
	cmpb	%bl, %cl
	jne	L(end)
	cmp	%bx, %cx
	jne	L(end)
L(1bytes):
	movzbl	-1(%eax), %eax
	cmpb	-1(%edx), %al
	mov	$0, %eax
	jne	L(end)
	RETURN
#endif
	.p2align 4
L(52bytes):
	movdqu	-52(%eax), %xmm1
	movdqu	-52(%edx), %xmm2
	mov	$-52, %ebx
	pxor	%xmm1, %xmm2
	ptest	%xmm2, %xmm0
	jnc	L(less16bytes)
L(36bytes):
	movdqu	-36(%eax), %xmm1
	movdqu	-36(%edx), %xmm2
	mov	$-36, %ebx
	pxor	%xmm1, %xmm2
	ptest	%xmm2, %xmm0
	jnc	L(less16bytes)
L(20bytes):
	movdqu	-20(%eax), %xmm1
	movdqu	-20(%edx), %xmm2
	mov	$-20, %ebx
	pxor	%xmm1, %xmm2
	ptest	%xmm2, %xmm0
	jnc	L(less16bytes)
	mov	-4(%eax), %ecx
#ifndef USE_AS_WMEMCMP
	mov	-4(%edx), %ebx
	cmp	%ebx, %ecx
#else
	cmp	-4(%edx), %ecx
#endif
	mov	$0, %eax
	jne	L(find_diff)
	RETURN

#ifndef USE_AS_WMEMCMP
	.p2align 4
L(53bytes):
	movdqu	-53(%eax), %xmm1
	movdqu	-53(%edx), %xmm2
	mov	$-53, %ebx
	pxor	%xmm1, %xmm2
	ptest	%xmm2, %xmm0
	jnc	L(less16bytes)
L(37bytes):
	mov	$-37, %ebx
	movdqu	-37(%eax), %xmm1
	movdqu	-37(%edx), %xmm2
	pxor	%xmm1, %xmm2
	ptest	%xmm2, %xmm0
	jnc	L(less16bytes)
L(21bytes):
	mov	$-21, %ebx
	movdqu	-21(%eax), %xmm1
	movdqu	-21(%edx), %xmm2
	pxor	%xmm1, %xmm2
	ptest	%xmm2, %xmm0
	jnc	L(less16bytes)
	mov	-5(%eax), %ecx
	mov	-5(%edx), %ebx
	cmp	%ebx, %ecx
	jne	L(find_diff)
	movzbl	-1(%eax), %ecx
	cmp	-1(%edx), %cl
	mov	$0, %eax
	jne	L(end)
	RETURN

	.p2align 4
L(54bytes):
	movdqu	-54(%eax), %xmm1
	movdqu	-54(%edx), %xmm2
	mov	$-54, %ebx
	pxor	%xmm1, %xmm2
	ptest	%xmm2, %xmm0
	jnc	L(less16bytes)
L(38bytes):
	mov	$-38, %ebx
	movdqu	-38(%eax), %xmm1
	movdqu	-38(%edx), %xmm2
	pxor	%xmm1, %xmm2
	ptest	%xmm2, %xmm0
	jnc	L(less16bytes)
L(22bytes):
	mov	$-22, %ebx
	movdqu	-22(%eax), %xmm1
	movdqu	-22(%edx), %xmm2
	pxor	%xmm1, %xmm2
	ptest	%xmm2, %xmm0
	jnc	L(less16bytes)

	mov	-6(%eax), %ecx
	mov	-6(%edx), %ebx
	cmp	%ebx, %ecx
	jne	L(find_diff)
	movzwl	-2(%eax), %ecx
	movzwl	-2(%edx), %ebx
	cmp	%bl, %cl
	jne	L(end)
	cmp	%bh, %ch
	mov	$0, %eax
	jne	L(end)
	RETURN

	.p2align 4
L(55bytes):
	movdqu	-55(%eax), %xmm1
	movdqu	-55(%edx), %xmm2
	mov	$-55, %ebx
	pxor	%xmm1, %xmm2
	ptest	%xmm2, %xmm0
	jnc	L(less16bytes)
L(39bytes):
	mov	$-39, %ebx
	movdqu	-39(%eax), %xmm1
	movdqu	-39(%edx), %xmm2
	pxor	%xmm1, %xmm2
	ptest	%xmm2, %xmm0
	jnc	L(less16bytes)
L(23bytes):
	mov	$-23, %ebx
	movdqu	-23(%eax), %xmm1
	movdqu	-23(%edx), %xmm2
	pxor	%xmm1, %xmm2
	ptest	%xmm2, %xmm0
	jnc	L(less16bytes)
	movl	-7(%eax), %ecx
	movl	-7(%edx), %ebx
	cmp	%ebx, %ecx
	jne	L(find_diff)
	movzwl	-3(%eax), %ecx
	movzwl	-3(%edx), %ebx
	cmpb	%bl, %cl
	jne	L(end)
	cmp	%bx, %cx
	jne	L(end)
	movzbl	-1(%eax), %eax
	cmpb	-1(%edx), %al
	mov	$0, %eax
	jne	L(end)
	RETURN
#endif
	.p2align 4
L(56bytes):
	movdqu	-56(%eax), %xmm1
	movdqu	-56(%edx), %xmm2
	mov	$-56, %ebx
	pxor	%xmm1, %xmm2
	ptest	%xmm2, %xmm0
	jnc	L(less16bytes)
L(40bytes):
	mov	$-40, %ebx
	movdqu	-40(%eax), %xmm1
	movdqu	-40(%edx), %xmm2
	pxor	%xmm1, %xmm2
	ptest	%xmm2, %xmm0
	jnc	L(less16bytes)
L(24bytes):
	mov	$-24, %ebx
	movdqu	-24(%eax), %xmm1
	movdqu	-24(%edx), %xmm2
	pxor	%xmm1, %xmm2
	ptest	%xmm2, %xmm0
	jnc	L(less16bytes)

	mov	-8(%eax), %ecx
#ifndef USE_AS_WMEMCMP
	mov	-8(%edx), %ebx
	cmp	%ebx, %ecx
#else
	cmp	-8(%edx), %ecx
#endif
	jne	L(find_diff)

	mov	-4(%eax), %ecx
#ifndef USE_AS_WMEMCMP
	mov	-4(%edx), %ebx
	cmp	%ebx, %ecx
#else
	cmp	-4(%edx), %ecx
#endif
	mov	$0, %eax
	jne	L(find_diff)
	RETURN

#ifndef USE_AS_WMEMCMP
	.p2align 4
L(57bytes):
	movdqu	-57(%eax), %xmm1
	movdqu	-57(%edx), %xmm2
	mov	$-57, %ebx
	pxor	%xmm1, %xmm2
	ptest	%xmm2, %xmm0
	jnc	L(less16bytes)
L(41bytes):
	mov	$-41, %ebx
	movdqu	-41(%eax), %xmm1
	movdqu	-41(%edx), %xmm2
	pxor	%xmm1, %xmm2
	ptest	%xmm2, %xmm0
	jnc	L(less16bytes)
L(25bytes):
	mov	$-25, %ebx
	movdqu	-25(%eax), %xmm1
	movdqu	-25(%edx), %xmm2
	pxor	%xmm1, %xmm2
	ptest	%xmm2, %xmm0
	jnc	L(less16bytes)
	mov	-9(%eax), %ecx
	mov	-9(%edx), %ebx
	cmp	%ebx, %ecx
	jne	L(find_diff)
	mov	-5(%eax), %ecx
	mov	-5(%edx), %ebx
	cmp	%ebx, %ecx
	jne	L(find_diff)
	movzbl	-1(%eax), %ecx
	cmp	-1(%edx), %cl
	mov	$0, %eax
	jne	L(end)
	RETURN

	.p2align 4
L(58bytes):
	movdqu	-58(%eax), %xmm1
	movdqu	-58(%edx), %xmm2
	mov	$-58, %ebx
	pxor	%xmm1, %xmm2
	ptest	%xmm2, %xmm0
	jnc	L(less16bytes)
L(42bytes):
	mov	$-42, %ebx
	movdqu	-42(%eax), %xmm1
	movdqu	-42(%edx), %xmm2
	pxor	%xmm1, %xmm2
	ptest	%xmm2, %xmm0
	jnc	L(less16bytes)
L(26bytes):
	mov	$-26, %ebx
	movdqu	-26(%eax), %xmm1
	movdqu	-26(%edx), %xmm2
	pxor	%xmm1, %xmm2
	ptest	%xmm2, %xmm0
	jnc	L(less16bytes)

	mov	-10(%eax), %ecx
	mov	-10(%edx), %ebx
	cmp	%ebx, %ecx
	jne	L(find_diff)

	mov	-6(%eax), %ecx
	mov	-6(%edx), %ebx
	cmp	%ebx, %ecx
	jne	L(find_diff)

	movzwl	-2(%eax), %ecx
	movzwl	-2(%edx), %ebx
	cmp	%bl, %cl
	jne	L(end)
	cmp	%bh, %ch
	mov	$0, %eax
	jne	L(end)
	RETURN

	.p2align 4
L(59bytes):
	movdqu	-59(%eax), %xmm1
	movdqu	-59(%edx), %xmm2
	mov	$-59, %ebx
	pxor	%xmm1, %xmm2
	ptest	%xmm2, %xmm0
	jnc	L(less16bytes)
L(43bytes):
	mov	$-43, %ebx
	movdqu	-43(%eax), %xmm1
	movdqu	-43(%edx), %xmm2
	pxor	%xmm1, %xmm2
	ptest	%xmm2, %xmm0
	jnc	L(less16bytes)
L(27bytes):
	mov	$-27, %ebx
	movdqu	-27(%eax), %xmm1
	movdqu	-27(%edx), %xmm2
	pxor	%xmm1, %xmm2
	ptest	%xmm2, %xmm0
	jnc	L(less16bytes)
	movl	-11(%eax), %ecx
	movl	-11(%edx), %ebx
	cmp	%ebx, %ecx
	jne	L(find_diff)
	movl	-7(%eax), %ecx
	movl	-7(%edx), %ebx
	cmp	%ebx, %ecx
	jne	L(find_diff)
	movzwl	-3(%eax), %ecx
	movzwl	-3(%edx), %ebx
	cmpb	%bl, %cl
	jne	L(end)
	cmp	%bx, %cx
	jne	L(end)
	movzbl	-1(%eax), %eax
	cmpb	-1(%edx), %al
	mov	$0, %eax
	jne	L(end)
	RETURN
#endif
	.p2align 4
L(60bytes):
	movdqu	-60(%eax), %xmm1
	movdqu	-60(%edx), %xmm2
	mov	$-60, %ebx
	pxor	%xmm1, %xmm2
	ptest	%xmm2, %xmm0
	jnc	L(less16bytes)
L(44bytes):
	mov	$-44, %ebx
	movdqu	-44(%eax), %xmm1
	movdqu	-44(%edx), %xmm2
	pxor	%xmm1, %xmm2
	ptest	%xmm2, %xmm0
	jnc	L(less16bytes)
L(28bytes):
	mov	$-28, %ebx
	movdqu	-28(%eax), %xmm1
	movdqu	-28(%edx), %xmm2
	pxor	%xmm1, %xmm2
	ptest	%xmm2, %xmm0
	jnc	L(less16bytes)

	mov	-12(%eax), %ecx
#ifndef USE_AS_WMEMCMP
	mov	-12(%edx), %ebx
	cmp	%ebx, %ecx
#else
	cmp	-12(%edx), %ecx
#endif
	jne	L(find_diff)

	mov	-8(%eax), %ecx
#ifndef USE_AS_WMEMCMP
	mov	-8(%edx), %ebx
	cmp	%ebx, %ecx
#else
	cmp	-8(%edx), %ecx
#endif
	jne	L(find_diff)

	mov	-4(%eax), %ecx
#ifndef USE_AS_WMEMCMP
	mov	-4(%edx), %ebx
	cmp	%ebx, %ecx
#else
	cmp	-4(%edx), %ecx
#endif
	mov	$0, %eax
	jne	L(find_diff)
	RETURN

#ifndef USE_AS_WMEMCMP
	.p2align 4
L(61bytes):
	movdqu	-61(%eax), %xmm1
	movdqu	-61(%edx), %xmm2
	mov	$-61, %ebx
	pxor	%xmm1, %xmm2
	ptest	%xmm2, %xmm0
	jnc	L(less16bytes)
L(45bytes):
	mov	$-45, %ebx
	movdqu	-45(%eax), %xmm1
	movdqu	-45(%edx), %xmm2
	pxor	%xmm1, %xmm2
	ptest	%xmm2, %xmm0
	jnc	L(less16bytes)
L(29bytes):
	mov	$-29, %ebx
	movdqu	-29(%eax), %xmm1
	movdqu	-29(%edx), %xmm2
	pxor	%xmm1, %xmm2
	ptest	%xmm2, %xmm0
	jnc	L(less16bytes)

	mov	-13(%eax), %ecx
	mov	-13(%edx), %ebx
	cmp	%ebx, %ecx
	jne	L(find_diff)

	mov	-9(%eax), %ecx
	mov	-9(%edx), %ebx
	cmp	%ebx, %ecx
	jne	L(find_diff)

	mov	-5(%eax), %ecx
	mov	-5(%edx), %ebx
	cmp	%ebx, %ecx
	jne	L(find_diff)
	movzbl	-1(%eax), %ecx
	cmp	-1(%edx), %cl
	mov	$0, %eax
	jne	L(end)
	RETURN

	.p2align 4
L(62bytes):
	movdqu	-62(%eax), %xmm1
	movdqu	-62(%edx), %xmm2
	mov	$-62, %ebx
	pxor	%xmm1, %xmm2
	ptest	%xmm2, %xmm0
	jnc	L(less16bytes)
L(46bytes):
	mov	$-46, %ebx
	movdqu	-46(%eax), %xmm1
	movdqu	-46(%edx), %xmm2
	pxor	%xmm1, %xmm2
	ptest	%xmm2, %xmm0
	jnc	L(less16bytes)
L(30bytes):
	mov	$-30, %ebx
	movdqu	-30(%eax), %xmm1
	movdqu	-30(%edx), %xmm2
	pxor	%xmm1, %xmm2
	ptest	%xmm2, %xmm0
	jnc	L(less16bytes)
	mov	-14(%eax), %ecx
	mov	-14(%edx), %ebx
	cmp	%ebx, %ecx
	jne	L(find_diff)
	mov	-10(%eax), %ecx
	mov	-10(%edx), %ebx
	cmp	%ebx, %ecx
	jne	L(find_diff)
	mov	-6(%eax), %ecx
	mov	-6(%edx), %ebx
	cmp	%ebx, %ecx
	jne	L(find_diff)
	movzwl	-2(%eax), %ecx
	movzwl	-2(%edx), %ebx
	cmp	%bl, %cl
	jne	L(end)
	cmp	%bh, %ch
	mov	$0, %eax
	jne	L(end)
	RETURN

	.p2align 4
L(63bytes):
	movdqu	-63(%eax), %xmm1
	movdqu	-63(%edx), %xmm2
	mov	$-63, %ebx
	pxor	%xmm1, %xmm2
	ptest	%xmm2, %xmm0
	jnc	L(less16bytes)
L(47bytes):
	mov	$-47, %ebx
	movdqu	-47(%eax), %xmm1
	movdqu	-47(%edx), %xmm2
	pxor	%xmm1, %xmm2
	ptest	%xmm2, %xmm0
	jnc	L(less16bytes)
L(31bytes):
	mov	$-31, %ebx
	movdqu	-31(%eax), %xmm1
	movdqu	-31(%edx), %xmm2
	pxor	%xmm1, %xmm2
	ptest	%xmm2, %xmm0
	jnc	L(less16bytes)

	movl	-15(%eax), %ecx
	movl	-15(%edx), %ebx
	cmp	%ebx, %ecx
	jne	L(find_diff)
	movl	-11(%eax), %ecx
	movl	-11(%edx), %ebx
	cmp	%ebx, %ecx
	jne	L(find_diff)
	movl	-7(%eax), %ecx
	movl	-7(%edx), %ebx
	cmp	%ebx, %ecx
	jne	L(find_diff)
	movzwl	-3(%eax), %ecx
	movzwl	-3(%edx), %ebx
	cmpb	%bl, %cl
	jne	L(end)
	cmp	%bx, %cx
	jne	L(end)
	movzbl	-1(%eax), %eax
	cmpb	-1(%edx), %al
	mov	$0, %eax
	jne	L(end)
	RETURN
#endif

	.p2align 4
L(64bytes):
	movdqu	-64(%eax), %xmm1
	movdqu	-64(%edx), %xmm2
	mov	$-64, %ebx
	pxor	%xmm1, %xmm2
	ptest	%xmm2, %xmm0
	jnc	L(less16bytes)
L(48bytes):
	movdqu	-48(%eax), %xmm1
	movdqu	-48(%edx), %xmm2
	mov	$-48, %ebx
	pxor	%xmm1, %xmm2
	ptest	%xmm2, %xmm0
	jnc	L(less16bytes)
L(32bytes):
	movdqu	-32(%eax), %xmm1
	movdqu	-32(%edx), %xmm2
	mov	$-32, %ebx
	pxor	%xmm1, %xmm2
	ptest	%xmm2, %xmm0
	jnc	L(less16bytes)

	mov	-16(%eax), %ecx
#ifndef USE_AS_WMEMCMP
	mov	-16(%edx), %ebx
	cmp	%ebx, %ecx
#else
	cmp	-16(%edx), %ecx
#endif
	jne	L(find_diff)

	mov	-12(%eax), %ecx
#ifndef USE_AS_WMEMCMP
	mov	-12(%edx), %ebx
	cmp	%ebx, %ecx
#else
	cmp	-12(%edx), %ecx
#endif
	jne	L(find_diff)

	mov	-8(%eax), %ecx
#ifndef USE_AS_WMEMCMP
	mov	-8(%edx), %ebx
	cmp	%ebx, %ecx
#else
	cmp	-8(%edx), %ecx
#endif
	jne	L(find_diff)

	mov	-4(%eax), %ecx
#ifndef USE_AS_WMEMCMP
	mov	-4(%edx), %ebx
	cmp	%ebx, %ecx
#else
	cmp	-4(%edx), %ecx
#endif
	mov	$0, %eax
	jne	L(find_diff)
	RETURN

#ifndef USE_AS_WMEMCMP
	.p2align 4
L(less16bytes):
	add	%ebx, %eax
	add	%ebx, %edx

	mov	(%eax), %ecx
	mov	(%edx), %ebx
	cmp	%ebx, %ecx
	jne	L(find_diff)

	mov	4(%eax), %ecx
	mov	4(%edx), %ebx
	cmp	%ebx, %ecx
	jne	L(find_diff)

	mov	8(%eax), %ecx
	mov	8(%edx), %ebx
	cmp	%ebx, %ecx
	jne	L(find_diff)

	mov	12(%eax), %ecx
	mov	12(%edx), %ebx
	cmp	%ebx, %ecx
	mov	$0, %eax
	jne	L(find_diff)
	RETURN
#else
	.p2align 4
L(less16bytes):
	add	%ebx, %eax
	add	%ebx, %edx

	mov	(%eax), %ecx
	cmp	(%edx), %ecx
	jne	L(find_diff)

	mov	4(%eax), %ecx
	cmp	4(%edx), %ecx
	jne	L(find_diff)

	mov	8(%eax), %ecx
	cmp	8(%edx), %ecx
	jne	L(find_diff)

	mov	12(%eax), %ecx
	cmp	12(%edx), %ecx

	mov	$0, %eax
	jne	L(find_diff)
	RETURN
#endif

	.p2align 4
L(find_diff):
#ifndef USE_AS_WMEMCMP
	cmpb	%bl, %cl
	jne	L(end)
	cmp	%bx, %cx
	jne	L(end)
	shr	$16,%ecx
	shr	$16,%ebx
	cmp	%bl, %cl
	jne	L(end)
	cmp	%bx, %cx
L(end):
	POP	(%ebx)
	mov	$1, %eax
	ja	L(bigger)
	neg	%eax
L(bigger):
	ret
#else
	POP	(%ebx)
	mov	$1, %eax
	jg	L(bigger)
	neg	%eax
	ret

	.p2align 4
L(bigger):
	ret
#endif
END (MEMCMP)

	.section .rodata.sse4.2,"a",@progbits
	.p2align 2
	.type	L(table_64bytes), @object
#ifndef USE_AS_WMEMCMP
L(table_64bytes):
	.int	JMPTBL (L(0bytes), L(table_64bytes))
	.int	JMPTBL (L(1bytes), L(table_64bytes))
	.int	JMPTBL (L(2bytes), L(table_64bytes))
	.int	JMPTBL (L(3bytes), L(table_64bytes))
	.int	JMPTBL (L(4bytes), L(table_64bytes))
	.int	JMPTBL (L(5bytes), L(table_64bytes))
	.int	JMPTBL (L(6bytes), L(table_64bytes))
	.int	JMPTBL (L(7bytes), L(table_64bytes))
	.int	JMPTBL (L(8bytes), L(table_64bytes))
	.int	JMPTBL (L(9bytes), L(table_64bytes))
	.int	JMPTBL (L(10bytes), L(table_64bytes))
	.int	JMPTBL (L(11bytes), L(table_64bytes))
	.int	JMPTBL (L(12bytes), L(table_64bytes))
	.int	JMPTBL (L(13bytes), L(table_64bytes))
	.int	JMPTBL (L(14bytes), L(table_64bytes))
	.int	JMPTBL (L(15bytes), L(table_64bytes))
	.int	JMPTBL (L(16bytes), L(table_64bytes))
	.int	JMPTBL (L(17bytes), L(table_64bytes))
	.int	JMPTBL (L(18bytes), L(table_64bytes))
	.int	JMPTBL (L(19bytes), L(table_64bytes))
	.int	JMPTBL (L(20bytes), L(table_64bytes))
	.int	JMPTBL (L(21bytes), L(table_64bytes))
	.int	JMPTBL (L(22bytes), L(table_64bytes))
	.int	JMPTBL (L(23bytes), L(table_64bytes))
	.int	JMPTBL (L(24bytes), L(table_64bytes))
	.int	JMPTBL (L(25bytes), L(table_64bytes))
	.int	JMPTBL (L(26bytes), L(table_64bytes))
	.int	JMPTBL (L(27bytes), L(table_64bytes))
	.int	JMPTBL (L(28bytes), L(table_64bytes))
	.int	JMPTBL (L(29bytes), L(table_64bytes))
	.int	JMPTBL (L(30bytes), L(table_64bytes))
	.int	JMPTBL (L(31bytes), L(table_64bytes))
	.int	JMPTBL (L(32bytes), L(table_64bytes))
	.int	JMPTBL (L(33bytes), L(table_64bytes))
	.int	JMPTBL (L(34bytes), L(table_64bytes))
	.int	JMPTBL (L(35bytes), L(table_64bytes))
	.int	JMPTBL (L(36bytes), L(table_64bytes))
	.int	JMPTBL (L(37bytes), L(table_64bytes))
	.int	JMPTBL (L(38bytes), L(table_64bytes))
	.int	JMPTBL (L(39bytes), L(table_64bytes))
	.int	JMPTBL (L(40bytes), L(table_64bytes))
	.int	JMPTBL (L(41bytes), L(table_64bytes))
	.int	JMPTBL (L(42bytes), L(table_64bytes))
	.int	JMPTBL (L(43bytes), L(table_64bytes))
	.int	JMPTBL (L(44bytes), L(table_64bytes))
	.int	JMPTBL (L(45bytes), L(table_64bytes))
	.int	JMPTBL (L(46bytes), L(table_64bytes))
	.int	JMPTBL (L(47bytes), L(table_64bytes))
	.int	JMPTBL (L(48bytes), L(table_64bytes))
	.int	JMPTBL (L(49bytes), L(table_64bytes))
	.int	JMPTBL (L(50bytes), L(table_64bytes))
	.int	JMPTBL (L(51bytes), L(table_64bytes))
	.int	JMPTBL (L(52bytes), L(table_64bytes))
	.int	JMPTBL (L(53bytes), L(table_64bytes))
	.int	JMPTBL (L(54bytes), L(table_64bytes))
	.int	JMPTBL (L(55bytes), L(table_64bytes))
	.int	JMPTBL (L(56bytes), L(table_64bytes))
	.int	JMPTBL (L(57bytes), L(table_64bytes))
	.int	JMPTBL (L(58bytes), L(table_64bytes))
	.int	JMPTBL (L(59bytes), L(table_64bytes))
	.int	JMPTBL (L(60bytes), L(table_64bytes))
	.int	JMPTBL (L(61bytes), L(table_64bytes))
	.int	JMPTBL (L(62bytes), L(table_64bytes))
	.int	JMPTBL (L(63bytes), L(table_64bytes))
	.int	JMPTBL (L(64bytes), L(table_64bytes))
#else
L(table_64bytes):
	.int	JMPTBL (L(0bytes), L(table_64bytes))
	.int	JMPTBL (L(unreal_case), L(table_64bytes))
	.int	JMPTBL (L(unreal_case), L(table_64bytes))
	.int	JMPTBL (L(unreal_case), L(table_64bytes))
	.int	JMPTBL (L(4bytes), L(table_64bytes))
	.int	JMPTBL (L(unreal_case), L(table_64bytes))
	.int	JMPTBL (L(unreal_case), L(table_64bytes))
	.int	JMPTBL (L(unreal_case), L(table_64bytes))
	.int	JMPTBL (L(8bytes), L(table_64bytes))
	.int	JMPTBL (L(unreal_case), L(table_64bytes))
	.int	JMPTBL (L(unreal_case), L(table_64bytes))
	.int	JMPTBL (L(unreal_case), L(table_64bytes))
	.int	JMPTBL (L(12bytes), L(table_64bytes))
	.int	JMPTBL (L(unreal_case), L(table_64bytes))
	.int	JMPTBL (L(unreal_case), L(table_64bytes))
	.int	JMPTBL (L(unreal_case), L(table_64bytes))
	.int	JMPTBL (L(16bytes), L(table_64bytes))
	.int	JMPTBL (L(unreal_case), L(table_64bytes))
	.int	JMPTBL (L(unreal_case), L(table_64bytes))
	.int	JMPTBL (L(unreal_case), L(table_64bytes))
	.int	JMPTBL (L(20bytes), L(table_64bytes))
	.int	JMPTBL (L(unreal_case), L(table_64bytes))
	.int	JMPTBL (L(unreal_case), L(table_64bytes))
	.int	JMPTBL (L(unreal_case), L(table_64bytes))
	.int	JMPTBL (L(24bytes), L(table_64bytes))
	.int	JMPTBL (L(unreal_case), L(table_64bytes))
	.int	JMPTBL (L(unreal_case), L(table_64bytes))
	.int	JMPTBL (L(unreal_case), L(table_64bytes))
	.int	JMPTBL (L(28bytes), L(table_64bytes))
	.int	JMPTBL (L(unreal_case), L(table_64bytes))
	.int	JMPTBL (L(unreal_case), L(table_64bytes))
	.int	JMPTBL (L(unreal_case), L(table_64bytes))
	.int	JMPTBL (L(32bytes), L(table_64bytes))
	.int	JMPTBL (L(unreal_case), L(table_64bytes))
	.int	JMPTBL (L(unreal_case), L(table_64bytes))
	.int	JMPTBL (L(unreal_case), L(table_64bytes))
	.int	JMPTBL (L(36bytes), L(table_64bytes))
	.int	JMPTBL (L(unreal_case), L(table_64bytes))
	.int	JMPTBL (L(unreal_case), L(table_64bytes))
	.int	JMPTBL (L(unreal_case), L(table_64bytes))
	.int	JMPTBL (L(40bytes), L(table_64bytes))
	.int	JMPTBL (L(unreal_case), L(table_64bytes))
	.int	JMPTBL (L(unreal_case), L(table_64bytes))
	.int	JMPTBL (L(unreal_case), L(table_64bytes))
	.int	JMPTBL (L(44bytes), L(table_64bytes))
	.int	JMPTBL (L(unreal_case), L(table_64bytes))
	.int	JMPTBL (L(unreal_case), L(table_64bytes))
	.int	JMPTBL (L(unreal_case), L(table_64bytes))
	.int	JMPTBL (L(48bytes), L(table_64bytes))
	.int	JMPTBL (L(unreal_case), L(table_64bytes))
	.int	JMPTBL (L(unreal_case), L(table_64bytes))
	.int	JMPTBL (L(unreal_case), L(table_64bytes))
	.int	JMPTBL (L(52bytes), L(table_64bytes))
	.int	JMPTBL (L(unreal_case), L(table_64bytes))
	.int	JMPTBL (L(unreal_case), L(table_64bytes))
	.int	JMPTBL (L(unreal_case), L(table_64bytes))
	.int	JMPTBL (L(56bytes), L(table_64bytes))
	.int	JMPTBL (L(unreal_case), L(table_64bytes))
	.int	JMPTBL (L(unreal_case), L(table_64bytes))
	.int	JMPTBL (L(unreal_case), L(table_64bytes))
	.int	JMPTBL (L(60bytes), L(table_64bytes))
	.int	JMPTBL (L(unreal_case), L(table_64bytes))
	.int	JMPTBL (L(unreal_case), L(table_64bytes))
	.int	JMPTBL (L(unreal_case), L(table_64bytes))
	.int	JMPTBL (L(64bytes), L(table_64bytes))
#endif