/* i80386 __mpn_submul_1 -- Multiply a limb vector with a limb and subtract

   the result from a second 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 SIZE	S1+4

#define S2LIMB	SIZE+4

#define res_ptr edi

#define s1_ptr esi

#define sizeP ecx

#define s2_limb ebx

	.text

ENTRY (__mpn_submul_1)

	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)

	cfi_rel_offset (edi, 12)

	cfi_rel_offset (esi, 8)

	cfi_rel_offset (ebp, 4)

	cfi_rel_offset (ebx, 0)

	movl	RES(%esp), %res_ptr

	movl	S1(%esp), %s1_ptr

	movl	SIZE(%esp), %sizeP

	movl	S2LIMB(%esp), %s2_limb

	leal	(%res_ptr,%sizeP,4), %res_ptr

	leal	(%s1_ptr,%sizeP,4), %s1_ptr

	negl	%sizeP

	xorl	%ebp, %ebp

	ALIGN (3)

L(oop):

	movl	(%s1_ptr,%sizeP,4), %eax

	mull	%s2_limb

	addl	%ebp, %eax

	adcl	$0, %edx

	subl	%eax, (%res_ptr,%sizeP,4)

	adcl	$0, %edx

	movl	%edx, %ebp

	incl	%sizeP

	jnz	L(oop)

	movl	%ebp, %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_submul_1)