/* strchr SSE2 without bsf

   Copyright (C) 2011-2018 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, see

   <http://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 PARMS  8

# define ENTRANCE PUSH(%edi)

# define RETURN  POP(%edi); ret; CFI_PUSH(%edi);

# define STR1  PARMS

# define STR2  STR1+4

	atom_text_section

ENTRY (__strchr_sse2)

	ENTRANCE

	mov	STR1(%esp), %ecx

	movd	STR2(%esp), %xmm1

	pxor	%xmm2, %xmm2

	mov	%ecx, %edi

	punpcklbw %xmm1, %xmm1

	punpcklbw %xmm1, %xmm1

	/* ECX has OFFSET. */

	and	$15, %ecx

	pshufd	$0, %xmm1, %xmm1

	je	L(loop)

/* Handle unaligned string.  */

	and	$-16, %edi

	movdqa	(%edi), %xmm0

	pcmpeqb	%xmm0, %xmm2

	pcmpeqb	%xmm1, %xmm0

	/* Find where NULL is.  */

	pmovmskb %xmm2, %edx

	/* Check if there is a match.  */

	pmovmskb %xmm0, %eax

	/* Remove the leading bytes.  */

	sarl	%cl, %edx

	sarl	%cl, %eax

	test	%eax, %eax

	jz	L(unaligned_no_match)

	/* Check which byte is a match.  */

	/* Is there a NULL? */

	add	%ecx, %edi

	test	%edx, %edx

	jz	L(match_case1)

	jmp	L(match_case2)

	.p2align 4

L(unaligned_no_match):

	test	%edx, %edx

	jne	L(return_null)

	pxor	%xmm2, %xmm2

	add	$16, %edi

	.p2align 4

/* Loop start on aligned string.  */

L(loop):

	movdqa	(%edi), %xmm0

	pcmpeqb	%xmm0, %xmm2

	pcmpeqb	%xmm1, %xmm0

	pmovmskb %xmm2, %edx

	pmovmskb %xmm0, %eax

	test	%eax, %eax

	jnz	L(matches)

	test	%edx, %edx

	jnz	L(return_null)

	add	$16, %edi

	movdqa	(%edi), %xmm0

	pcmpeqb	%xmm0, %xmm2

	pcmpeqb	%xmm1, %xmm0

	pmovmskb %xmm2, %edx

	pmovmskb %xmm0, %eax

	test	%eax, %eax

	jnz	L(matches)

	test	%edx, %edx

	jnz	L(return_null)

	add	$16, %edi

	movdqa	(%edi), %xmm0

	pcmpeqb	%xmm0, %xmm2

	pcmpeqb	%xmm1, %xmm0

	pmovmskb %xmm2, %edx

	pmovmskb %xmm0, %eax

	test	%eax, %eax

	jnz	L(matches)

	test	%edx, %edx

	jnz	L(return_null)

	add	$16, %edi

	movdqa	(%edi), %xmm0

	pcmpeqb	%xmm0, %xmm2

	pcmpeqb	%xmm1, %xmm0

	pmovmskb %xmm2, %edx

	pmovmskb %xmm0, %eax

	test	%eax, %eax

	jnz	L(matches)

	test	%edx, %edx

	jnz	L(return_null)

	add	$16, %edi

	jmp	L(loop)

L(matches):

	/* There is a match.  First find where NULL is.  */

	test	%edx, %edx

	jz	L(match_case1)

	.p2align 4

L(match_case2):

	test	%al, %al

	jz	L(match_higth_case2)

	mov	%al, %cl

	and	$15, %cl

	jnz	L(match_case2_4)

	mov	%dl, %ch

	and	$15, %ch

	jnz	L(return_null)

	test	$0x10, %al

	jnz	L(Exit5)

	test	$0x10, %dl

	jnz	L(return_null)

	test	$0x20, %al

	jnz	L(Exit6)

	test	$0x20, %dl

	jnz	L(return_null)

	test	$0x40, %al

	jnz	L(Exit7)

	test	$0x40, %dl

	jnz	L(return_null)

	lea	7(%edi), %eax

	RETURN

	.p2align 4

L(match_case2_4):

	test	$0x01, %al

	jnz	L(Exit1)

	test	$0x01, %dl

	jnz	L(return_null)

	test	$0x02, %al

	jnz	L(Exit2)

	test	$0x02, %dl

	jnz	L(return_null)

	test	$0x04, %al

	jnz	L(Exit3)

	test	$0x04, %dl

	jnz	L(return_null)

	lea	3(%edi), %eax

	RETURN

	.p2align 4

L(match_higth_case2):

	test	%dl, %dl

	jnz	L(return_null)

	mov	%ah, %cl

	and	$15, %cl

	jnz	L(match_case2_12)

	mov	%dh, %ch

	and	$15, %ch

	jnz	L(return_null)

	test	$0x10, %ah

	jnz	L(Exit13)

	test	$0x10, %dh

	jnz	L(return_null)

	test	$0x20, %ah

	jnz	L(Exit14)

	test	$0x20, %dh

	jnz	L(return_null)

	test	$0x40, %ah

	jnz	L(Exit15)

	test	$0x40, %dh

	jnz	L(return_null)

	lea	15(%edi), %eax

	RETURN

	.p2align 4

L(match_case2_12):

	test	$0x01, %ah

	jnz	L(Exit9)

	test	$0x01, %dh

	jnz	L(return_null)

	test	$0x02, %ah

	jnz	L(Exit10)

	test	$0x02, %dh

	jnz	L(return_null)

	test	$0x04, %ah

	jnz	L(Exit11)

	test	$0x04, %dh

	jnz	L(return_null)

	lea	11(%edi), %eax

	RETURN

	.p2align 4

L(match_case1):

	test	%al, %al

	jz	L(match_higth_case1)

	test	$0x01, %al

	jnz	L(Exit1)

	test	$0x02, %al

	jnz	L(Exit2)

	test	$0x04, %al

	jnz	L(Exit3)

	test	$0x08, %al

	jnz	L(Exit4)

	test	$0x10, %al

	jnz	L(Exit5)

	test	$0x20, %al

	jnz	L(Exit6)

	test	$0x40, %al

	jnz	L(Exit7)

	lea	7(%edi), %eax

	RETURN

	.p2align 4

L(match_higth_case1):

	test	$0x01, %ah

	jnz	L(Exit9)

	test	$0x02, %ah

	jnz	L(Exit10)

	test	$0x04, %ah

	jnz	L(Exit11)

	test	$0x08, %ah

	jnz	L(Exit12)

	test	$0x10, %ah

	jnz	L(Exit13)

	test	$0x20, %ah

	jnz	L(Exit14)

	test	$0x40, %ah

	jnz	L(Exit15)

	lea	15(%edi), %eax

	RETURN

	.p2align 4

L(Exit1):

	lea	(%edi), %eax

	RETURN

	.p2align 4

L(Exit2):

	lea	1(%edi), %eax

	RETURN

	.p2align 4

L(Exit3):

	lea	2(%edi), %eax

	RETURN

	.p2align 4

L(Exit4):

	lea	3(%edi), %eax

	RETURN

	.p2align 4

L(Exit5):

	lea	4(%edi), %eax

	RETURN

	.p2align 4

L(Exit6):

	lea	5(%edi), %eax

	RETURN

	.p2align 4

L(Exit7):

	lea	6(%edi), %eax

	RETURN

	.p2align 4

L(Exit9):

	lea	8(%edi), %eax

	RETURN

	.p2align 4

L(Exit10):

	lea	9(%edi), %eax

	RETURN

	.p2align 4

L(Exit11):

	lea	10(%edi), %eax

	RETURN

	.p2align 4

L(Exit12):

	lea	11(%edi), %eax

	RETURN

	.p2align 4

L(Exit13):

	lea	12(%edi), %eax

	RETURN

	.p2align 4

L(Exit14):

	lea	13(%edi), %eax

	RETURN

	.p2align 4

L(Exit15):

	lea	14(%edi), %eax

	RETURN

/* Return NULL.  */

	.p2align 4

L(return_null):

	xor	%eax, %eax

	RETURN

END (__strchr_sse2)

#endif