/* Pentium __mpn_sub_n -- Subtract two limb vectors of the same length > 0

   and store difference in a third limb vector.

   Copyright (C) 1992-2018 Free Software Foundation, Inc.

   This file is part of the GNU MP Library.

   The GNU MP 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 MP 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 MP Library; see the file COPYING.LIB.  If not,

   see <http://www.gnu.org/licenses/>.  */

#include "sysdep.h"

#include "asm-syntax.h"

#define PARMS	4+16		/* space for 4 saved regs */

#define RES	PARMS

#define S1	RES+4

#define S2	S1+4

#define SIZE	S2+4

	.text

ENTRY (__mpn_sub_n)

	pushl	%edi

	cfi_adjust_cfa_offset (4)

	pushl	%esi

	cfi_adjust_cfa_offset (4)

	pushl	%ebp

	cfi_adjust_cfa_offset (4)

	pushl	%ebx

	cfi_adjust_cfa_offset (4)

	movl	RES(%esp),%edi

	cfi_rel_offset (edi, 12)

	movl	S1(%esp),%esi

	cfi_rel_offset (esi, 8)

	movl	S2(%esp),%ebx

	cfi_rel_offset (ebx, 0)

	movl	SIZE(%esp),%ecx

	movl	(%ebx),%ebp

	cfi_rel_offset (ebp, 4)

	decl	%ecx

	movl	%ecx,%edx

	shrl	$3,%ecx

	andl	$7,%edx

	testl	%ecx,%ecx		/* zero carry flag */

	jz	L(end)

	pushl	%edx

	cfi_adjust_cfa_offset (4)

	ALIGN (3)

L(oop):	movl	28(%edi),%eax		/* fetch destination cache line */

	leal	32(%edi),%edi

L(1):	movl	(%esi),%eax

	movl	4(%esi),%edx

	sbbl	%ebp,%eax

	movl	4(%ebx),%ebp

	sbbl	%ebp,%edx

	movl	8(%ebx),%ebp

	movl	%eax,-32(%edi)

	movl	%edx,-28(%edi)

L(2):	movl	8(%esi),%eax

	movl	12(%esi),%edx

	sbbl	%ebp,%eax

	movl	12(%ebx),%ebp

	sbbl	%ebp,%edx

	movl	16(%ebx),%ebp

	movl	%eax,-24(%edi)

	movl	%edx,-20(%edi)

L(3):	movl	16(%esi),%eax

	movl	20(%esi),%edx

	sbbl	%ebp,%eax

	movl	20(%ebx),%ebp

	sbbl	%ebp,%edx

	movl	24(%ebx),%ebp

	movl	%eax,-16(%edi)

	movl	%edx,-12(%edi)

L(4):	movl	24(%esi),%eax

	movl	28(%esi),%edx

	sbbl	%ebp,%eax

	movl	28(%ebx),%ebp

	sbbl	%ebp,%edx

	movl	32(%ebx),%ebp

	movl	%eax,-8(%edi)

	movl	%edx,-4(%edi)

	leal	32(%esi),%esi

	leal	32(%ebx),%ebx

	decl	%ecx

	jnz	L(oop)

	popl	%edx

	cfi_adjust_cfa_offset (-4)

L(end):

	decl	%edx			/* test %edx w/o clobbering carry */

	js	L(end2)

	incl	%edx

L(oop2):

	leal	4(%edi),%edi

	movl	(%esi),%eax

	sbbl	%ebp,%eax

	movl	4(%ebx),%ebp

	movl	%eax,-4(%edi)

	leal	4(%esi),%esi

	leal	4(%ebx),%ebx

	decl	%edx

	jnz	L(oop2)

L(end2):

	movl	(%esi),%eax

	sbbl	%ebp,%eax

	movl	%eax,(%edi)

	sbbl	%eax,%eax

	negl	%eax

	popl	%ebx

	cfi_adjust_cfa_offset (-4)

	cfi_restore (ebx)

	popl	%ebp

	cfi_adjust_cfa_offset (-4)

	cfi_restore (ebp)

	popl	%esi

	cfi_adjust_cfa_offset (-4)

	cfi_restore (esi)

	popl	%edi

	cfi_adjust_cfa_offset (-4)

	cfi_restore (edi)

	ret

END (__mpn_sub_n)