/* Pentium __mpn_submul_1 -- Multiply a limb vector with a limb and subtract
   the result from a second limb vector.
   Copyright (C) 1992, 94, 96, 97, 98, 00 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, write to
   the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston,
   MA 02111-1307, USA. */

#include "sysdep.h"
#include "asm-syntax.h"
#include "bp-sym.h"
#include "bp-asm.h"

#define PARMS   LINKAGE+16      /* space for 4 saved regs */
#define RES     PARMS
#define S1      RES+PTR_SIZE
#define SIZE    S1+PTR_SIZE
#define S2LIMB  SIZE+4

#define res_ptr edi
#define s1_ptr esi
#define size ecx
#define s2_limb ebx

        .text
ENTRY (BP_SYM (__mpn_submul_1))
        ENTER

        pushl   %edi
        pushl   %esi
        pushl   %ebp
        pushl   %ebx

        movl    RES(%esp), %res_ptr
        movl    S1(%esp), %s1_ptr
        movl    SIZE(%esp), %size
        movl    S2LIMB(%esp), %s2_limb
#if __BOUNDED_POINTERS__
        shll    $2, %sizeP      /* convert limbs to bytes */
        CHECK_BOUNDS_BOTH_WIDE (%res_ptr, RES(%esp), %sizeP)
        CHECK_BOUNDS_BOTH_WIDE (%s1_ptr, S1(%esp), %sizeP)
        shrl    $2, %sizeP
#endif
        leal    (%res_ptr,%size,4), %res_ptr
        leal    (%s1_ptr,%size,4), %s1_ptr
        negl    %size
        xorl    %ebp, %ebp
        ALIGN (3)

L(oop): adcl    $0, %ebp
        movl    (%s1_ptr,%size,4), %eax

        mull    %s2_limb

        addl    %ebp, %eax
        movl    (%res_ptr,%size,4), %ebp

        adcl    $0, %edx
        subl    %eax, %ebp

        movl    %ebp, (%res_ptr,%size,4)
        incl    %size

        movl    %edx, %ebp
        jnz     L(oop)

        adcl    $0, %ebp
        movl    %ebp, %eax
        popl    %ebx
        popl    %ebp
        popl    %esi
        popl    %edi

        LEAVE
        ret
#undef size
END (BP_SYM (__mpn_submul_1))