/* strcat with SSSE3
   Copyright (C) 2011-2025 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)

# ifndef STRCAT
#  define STRCAT  __strcat_ssse3
# endif

# define PARMS  4
# define STR1  PARMS+4
# define STR2  STR1+4

# ifdef USE_AS_STRNCAT
#  define LEN STR2+8
# endif

# define USE_AS_STRCAT

.text
ENTRY (STRCAT)
	PUSH	(%edi)
	mov	STR1(%esp), %edi
	mov	%edi, %edx

# define RETURN  jmp L(StartStrcpyPart)
# include "strlen-sse2.S"

L(StartStrcpyPart):
	mov	STR2(%esp), %ecx
	lea	(%edi, %eax), %edx
# ifdef USE_AS_STRNCAT
	PUSH	(%ebx)
	mov	LEN(%esp), %ebx
	test	%ebx, %ebx
	jz	L(StrncatExit0)
	cmp	$8, %ebx
	jbe	L(StrncatExit8Bytes)
# endif
	cmpb	$0, (%ecx)
	jz	L(Exit1)
	cmpb	$0, 1(%ecx)
	jz	L(Exit2)
	cmpb	$0, 2(%ecx)
	jz	L(Exit3)
	cmpb	$0, 3(%ecx)
	jz	L(Exit4)
	cmpb	$0, 4(%ecx)
	jz	L(Exit5)
	cmpb	$0, 5(%ecx)
	jz	L(Exit6)
	cmpb	$0, 6(%ecx)
	jz	L(Exit7)
	cmpb	$0, 7(%ecx)
	jz	L(Exit8)
	cmpb	$0, 8(%ecx)
	jz	L(Exit9)
# ifdef USE_AS_STRNCAT
	cmp	$16, %ebx
	jb	L(StrncatExit15Bytes)
# endif
	cmpb	$0, 9(%ecx)
	jz	L(Exit10)
	cmpb	$0, 10(%ecx)
	jz	L(Exit11)
	cmpb	$0, 11(%ecx)
	jz	L(Exit12)
	cmpb	$0, 12(%ecx)
	jz	L(Exit13)
	cmpb	$0, 13(%ecx)
	jz	L(Exit14)
	cmpb	$0, 14(%ecx)
	jz	L(Exit15)
	cmpb	$0, 15(%ecx)
	jz	L(Exit16)
# ifdef USE_AS_STRNCAT
	cmp	$16, %ebx
	je	L(StrncatExit16)

#  define RETURN1	\
	POP	(%ebx);	\
	POP	(%edi);	\
	ret;	\
	CFI_PUSH	(%ebx);	\
	CFI_PUSH	(%edi)
#  define USE_AS_STRNCPY
# else
#  define RETURN1  POP (%edi); ret; CFI_PUSH (%edi)
# endif
# include "strcpy-ssse3.S"
	.p2align 4
L(CopyFrom1To16Bytes):
	add	%esi, %edx
	add	%esi, %ecx

	POP	(%esi)
	test	%al, %al
	jz	L(ExitHigh)
	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)
	movlpd	(%ecx), %xmm0
	movlpd	%xmm0, (%edx)
	movl	%edi, %eax
	RETURN1

	.p2align 4
L(ExitHigh):
	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)
	movlpd	(%ecx), %xmm0
	movlpd	8(%ecx), %xmm1
	movlpd	%xmm0, (%edx)
	movlpd	%xmm1, 8(%edx)
	movl	%edi, %eax
	RETURN1

	.p2align 4
L(StrncatExit1):
	movb	%bh, 1(%edx)
L(Exit1):
	movb	(%ecx), %al
	movb	%al, (%edx)
	movl	%edi, %eax
	RETURN1

	.p2align 4
L(StrncatExit2):
	movb	%bh, 2(%edx)
L(Exit2):
	movw	(%ecx), %ax
	movw	%ax, (%edx)
	movl	%edi, %eax
	RETURN1

	.p2align 4
L(StrncatExit3):
	movb	%bh, 3(%edx)
L(Exit3):
	movw	(%ecx), %ax
	movw	%ax, (%edx)
	movb	2(%ecx), %al
	movb	%al, 2(%edx)
	movl	%edi, %eax
	RETURN1

	.p2align 4
L(StrncatExit4):
	movb	%bh, 4(%edx)
L(Exit4):
	movl	(%ecx), %eax
	movl	%eax, (%edx)
	movl	%edi, %eax
	RETURN1

	.p2align 4
L(StrncatExit5):
	movb	%bh, 5(%edx)
L(Exit5):
	movl	(%ecx), %eax
	movl	%eax, (%edx)
	movb	4(%ecx), %al
	movb	%al, 4(%edx)
	movl	%edi, %eax
	RETURN1

	.p2align 4
L(StrncatExit6):
	movb	%bh, 6(%edx)
L(Exit6):
	movl	(%ecx), %eax
	movl	%eax, (%edx)
	movw	4(%ecx), %ax
	movw	%ax, 4(%edx)
	movl	%edi, %eax
	RETURN1

	.p2align 4
L(StrncatExit7):
	movb	%bh, 7(%edx)
L(Exit7):
	movl	(%ecx), %eax
	movl	%eax, (%edx)
	movl	3(%ecx), %eax
	movl	%eax, 3(%edx)
	movl	%edi, %eax
	RETURN1

	.p2align 4
L(StrncatExit8):
	movb	%bh, 8(%edx)
L(Exit8):
	movlpd	(%ecx), %xmm0
	movlpd	%xmm0, (%edx)
	movl	%edi, %eax
	RETURN1

	.p2align 4
L(StrncatExit9):
	movb	%bh, 9(%edx)
L(Exit9):
	movlpd	(%ecx), %xmm0
	movlpd	%xmm0, (%edx)
	movb	8(%ecx), %al
	movb	%al, 8(%edx)
	movl	%edi, %eax
	RETURN1

	.p2align 4
L(StrncatExit10):
	movb	%bh, 10(%edx)
L(Exit10):
	movlpd	(%ecx), %xmm0
	movlpd	%xmm0, (%edx)
	movw	8(%ecx), %ax
	movw	%ax, 8(%edx)
	movl	%edi, %eax
	RETURN1

	.p2align 4
L(StrncatExit11):
	movb	%bh, 11(%edx)
L(Exit11):
	movlpd	(%ecx), %xmm0
	movlpd	%xmm0, (%edx)
	movl	7(%ecx), %eax
	movl	%eax, 7(%edx)
	movl	%edi, %eax
	RETURN1

	.p2align 4
L(StrncatExit12):
	movb	%bh, 12(%edx)
L(Exit12):
	movlpd	(%ecx), %xmm0
	movlpd	%xmm0, (%edx)
	movl	8(%ecx), %eax
	movl	%eax, 8(%edx)
	movl	%edi, %eax
	RETURN1

	.p2align 4
L(StrncatExit13):
	movb	%bh, 13(%edx)
L(Exit13):
	movlpd	(%ecx), %xmm0
	movlpd	%xmm0, (%edx)
	movlpd	5(%ecx), %xmm0
	movlpd	%xmm0, 5(%edx)
	movl	%edi, %eax
	RETURN1

	.p2align 4
L(StrncatExit14):
	movb	%bh, 14(%edx)
L(Exit14):
	movlpd	(%ecx), %xmm0
	movlpd	%xmm0, (%edx)
	movlpd	6(%ecx), %xmm0
	movlpd	%xmm0, 6(%edx)
	movl	%edi, %eax
	RETURN1

	.p2align 4
L(StrncatExit15):
	movb	%bh, 15(%edx)
L(Exit15):
	movlpd	(%ecx), %xmm0
	movlpd	%xmm0, (%edx)
	movlpd	7(%ecx), %xmm0
	movlpd	%xmm0, 7(%edx)
	movl	%edi, %eax
	RETURN1

	.p2align 4
L(StrncatExit16):
	movb	%bh, 16(%edx)
L(Exit16):
	movlpd	(%ecx), %xmm0
	movlpd	8(%ecx), %xmm1
	movlpd	%xmm0, (%edx)
	movlpd	%xmm1, 8(%edx)
	movl	%edi, %eax
	RETURN1

# ifdef USE_AS_STRNCPY

	CFI_PUSH(%esi)

	.p2align 4
L(CopyFrom1To16BytesCase2):
	add	$16, %ebx
	add	%esi, %ecx
	lea	(%esi, %edx), %esi
	lea	-9(%ebx), %edx
	and	$1<<7, %dh
	or	%al, %dh
	test	%dh, %dh
	lea	(%esi), %edx
	POP	(%esi)
	jz	L(ExitHighCase2)

	test	$0x01, %al
	jnz	L(Exit1)
	cmp	$1, %ebx
	je	L(StrncatExit1)
	test	$0x02, %al
	jnz	L(Exit2)
	cmp	$2, %ebx
	je	L(StrncatExit2)
	test	$0x04, %al
	jnz	L(Exit3)
	cmp	$3, %ebx
	je	L(StrncatExit3)
	test	$0x08, %al
	jnz	L(Exit4)
	cmp	$4, %ebx
	je	L(StrncatExit4)
	test	$0x10, %al
	jnz	L(Exit5)
	cmp	$5, %ebx
	je	L(StrncatExit5)
	test	$0x20, %al
	jnz	L(Exit6)
	cmp	$6, %ebx
	je	L(StrncatExit6)
	test	$0x40, %al
	jnz	L(Exit7)
	cmp	$7, %ebx
	je	L(StrncatExit7)
	movlpd	(%ecx), %xmm0
	movlpd	%xmm0, (%edx)
	lea	7(%edx), %eax
	cmpb	$1, (%eax)
	sbb	$-1, %eax
	xor	%cl, %cl
	movb	%cl, (%eax)
	movl	%edi, %eax
	RETURN1

	.p2align 4
L(ExitHighCase2):
	test	$0x01, %ah
	jnz	L(Exit9)
	cmp	$9, %ebx
	je	L(StrncatExit9)
	test	$0x02, %ah
	jnz	L(Exit10)
	cmp	$10, %ebx
	je	L(StrncatExit10)
	test	$0x04, %ah
	jnz	L(Exit11)
	cmp	$11, %ebx
	je	L(StrncatExit11)
	test	$0x8, %ah
	jnz	L(Exit12)
	cmp	$12, %ebx
	je	L(StrncatExit12)
	test	$0x10, %ah
	jnz	L(Exit13)
	cmp	$13, %ebx
	je	L(StrncatExit13)
	test	$0x20, %ah
	jnz	L(Exit14)
	cmp	$14, %ebx
	je	L(StrncatExit14)
	test	$0x40, %ah
	jnz	L(Exit15)
	cmp	$15, %ebx
	je	L(StrncatExit15)
	movlpd	(%ecx), %xmm0
	movlpd	%xmm0, (%edx)
	movlpd	8(%ecx), %xmm1
	movlpd	%xmm1, 8(%edx)
	movl	%edi, %eax
	RETURN1

	CFI_PUSH(%esi)

L(CopyFrom1To16BytesCase2OrCase3):
	test	%eax, %eax
	jnz	L(CopyFrom1To16BytesCase2)

	.p2align 4
L(CopyFrom1To16BytesCase3):
	add	$16, %ebx
	add	%esi, %edx
	add	%esi, %ecx

	POP	(%esi)

	cmp	$8, %ebx
	ja	L(ExitHighCase3)
	cmp	$1, %ebx
	je	L(StrncatExit1)
	cmp	$2, %ebx
	je	L(StrncatExit2)
	cmp	$3, %ebx
	je	L(StrncatExit3)
	cmp	$4, %ebx
	je	L(StrncatExit4)
	cmp	$5, %ebx
	je	L(StrncatExit5)
	cmp	$6, %ebx
	je	L(StrncatExit6)
	cmp	$7, %ebx
	je	L(StrncatExit7)
	movlpd	(%ecx), %xmm0
	movlpd	%xmm0, (%edx)
	movb	%bh, 8(%edx)
	movl	%edi, %eax
	RETURN1

	.p2align 4
L(ExitHighCase3):
	cmp	$9, %ebx
	je	L(StrncatExit9)
	cmp	$10, %ebx
	je	L(StrncatExit10)
	cmp	$11, %ebx
	je	L(StrncatExit11)
	cmp	$12, %ebx
	je	L(StrncatExit12)
	cmp	$13, %ebx
	je	L(StrncatExit13)
	cmp	$14, %ebx
	je	L(StrncatExit14)
	cmp	$15, %ebx
	je	L(StrncatExit15)
	movlpd	(%ecx), %xmm0
	movlpd	%xmm0, (%edx)
	movlpd	8(%ecx), %xmm1
	movlpd	%xmm1, 8(%edx)
	movb	%bh, 16(%edx)
	movl	%edi, %eax
	RETURN1

	.p2align 4
L(StrncatExit0):
	movl	%edi, %eax
	RETURN1

	.p2align 4
L(StrncatExit15Bytes):
	cmp	$9, %ebx
	je	L(StrncatExit9)
	cmpb	$0, 9(%ecx)
	jz	L(Exit10)
	cmp	$10, %ebx
	je	L(StrncatExit10)
	cmpb	$0, 10(%ecx)
	jz	L(Exit11)
	cmp	$11, %ebx
	je	L(StrncatExit11)
	cmpb	$0, 11(%ecx)
	jz	L(Exit12)
	cmp	$12, %ebx
	je	L(StrncatExit12)
	cmpb	$0, 12(%ecx)
	jz	L(Exit13)
	cmp	$13, %ebx
	je	L(StrncatExit13)
	cmpb	$0, 13(%ecx)
	jz	L(Exit14)
	cmp	$14, %ebx
	je	L(StrncatExit14)
	movlpd	(%ecx), %xmm0
	movlpd	%xmm0, (%edx)
	movlpd	7(%ecx), %xmm0
	movlpd	%xmm0, 7(%edx)
	lea	14(%edx), %eax
	cmpb	$1, (%eax)
	sbb	$-1, %eax
	movb	%bh, (%eax)
	movl	%edi, %eax
	RETURN1

	.p2align 4
L(StrncatExit8Bytes):
	cmpb	$0, (%ecx)
	jz	L(Exit1)
	cmp	$1, %ebx
	je	L(StrncatExit1)
	cmpb	$0, 1(%ecx)
	jz	L(Exit2)
	cmp	$2, %ebx
	je	L(StrncatExit2)
	cmpb	$0, 2(%ecx)
	jz	L(Exit3)
	cmp	$3, %ebx
	je	L(StrncatExit3)
	cmpb	$0, 3(%ecx)
	jz	L(Exit4)
	cmp	$4, %ebx
	je	L(StrncatExit4)
	cmpb	$0, 4(%ecx)
	jz	L(Exit5)
	cmp	$5, %ebx
	je	L(StrncatExit5)
	cmpb	$0, 5(%ecx)
	jz	L(Exit6)
	cmp	$6, %ebx
	je	L(StrncatExit6)
	cmpb	$0, 6(%ecx)
	jz	L(Exit7)
	cmp	$7, %ebx
	je	L(StrncatExit7)
	movlpd	(%ecx), %xmm0
	movlpd	%xmm0, (%edx)
	lea	7(%edx), %eax
	cmpb	$1, (%eax)
	sbb	$-1, %eax
	movb	%bh, (%eax)
	movl	%edi, %eax
	RETURN1

# endif
END (STRCAT)
#endif
