/* x86 __gmpn_submul_1 (for 386 and 486) -- Multiply a limb vector
   with a limb and store the result in a second limb vector.

Copyright (C) 1992, 1994, 1997, 1999, 2000 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 Library General Public License as published by
the Free Software Foundation; either version 2 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 Library General Public
License for more details.

You should have received a copy of the GNU Library General Public License
along with the GNU MP Library; see the file COPYING.LIB.  If not, write to
the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston,
MA 02111-1307, USA. */

/*
   INPUT PARAMETERS
   res_ptr	(sp + 4)
   s1_ptr	(sp + 8)
   n		(sp + 12)
   s2_limb	(sp + 16)
*/

#include "asm-syntax.h"

#define res_ptr edi
#define s1_ptr esi
#define n ecx
#define s2_limb ebp

	TEXT
	ALIGN (3)
PROLOGUE(C_SYMBOL_NAME(__gmpn_submul_1))
	GLOBL	C_SYMBOL_NAME(__gmpn_submul_1)
C_SYMBOL_NAME(__gmpn_submul_1:)

	INSN1(push,l	,R(edi))
	INSN1(push,l	,R(esi))
	INSN1(push,l	,R(ebx))
	INSN1(push,l	,R(ebp))

	movl	20(%esp),%edi
	movl	24(%esp),%esi
	movl	28(%esp),%ecx

	xorl	%ebx,%ebx
	andl	$3,%ecx
	jz	Lend0

Loop0:	movl	(%esi),%eax
	mull	32(%esp)
	leal	4(%esi),%esi
	addl	%ebx,%eax
	movl	$0,%ebx
	adcl	%ebx,%edx
	subl	%eax,(%edi)
	adcl	%edx,%ebx		/* propagate carry into cylimb */

	leal	4(%edi),%edi
	decl	%ecx
	jnz	Loop0

Lend0:	movl	28(%esp),%ecx
	shrl	$2,%ecx
	jz	Lend

	ALIGN (3)
Loop:	movl	(%esi),%eax
	mull	32(%esp)
	addl	%eax,%ebx
	movl	$0,%ebp
	adcl	%edx,%ebp

	movl	4(%esi),%eax
	mull	32(%esp)
	subl	%ebx,(%edi)
	adcl	%eax,%ebp	/* new lo + cylimb */
	movl	$0,%ebx
	adcl	%edx,%ebx

	movl	8(%esi),%eax
	mull	32(%esp)
	subl	%ebp,4(%edi)
	adcl	%eax,%ebx	/* new lo + cylimb */
	movl	$0,%ebp
	adcl	%edx,%ebp

	movl	12(%esi),%eax
	mull	32(%esp)
	subl	%ebx,8(%edi)
	adcl	%eax,%ebp	/* new lo + cylimb */
	movl	$0,%ebx
	adcl	%edx,%ebx

	subl	%ebp,12(%edi)
	adcl	$0,%ebx		/* propagate carry into cylimb */

	leal	16(%esi),%esi
	leal	16(%edi),%edi
	decl	%ecx
	jnz	Loop

Lend:	movl	%ebx,%eax

	INSN1(pop,l	,R(ebp))
	INSN1(pop,l	,R(ebx))
	INSN1(pop,l	,R(esi))
	INSN1(pop,l	,R(edi))
	ret

EPILOGUE(C_SYMBOL_NAME(__gmpn_submul_1))