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/* i80386 __mpn_submul_1 -- Multiply a limb vector with a limb and subtract
the result from a second limb vector.
Copyright (C) 1992, 1994, 1997, 1998, 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. */
#include "sysdep.h"
#include "asm-syntax.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 sizeP ecx
#define s2_limb ebp
.text
ENTRY(__mpn_submul_1)
ENTER
INSN1(push,l ,R(edi))
INSN1(push,l ,R(esi))
INSN1(push,l ,R(ebx))
INSN1(push,l ,R(ebp))
INSN2(mov,l ,R(res_ptr),MEM_DISP(esp,RES))
INSN2(mov,l ,R(s1_ptr),MEM_DISP(esp,S1))
INSN2(mov,l ,R(sizeP),MEM_DISP(esp,SIZE))
INSN2(mov,l ,R(s2_limb),MEM_DISP(esp,S2LIMB))
INSN2(lea,l ,R(res_ptr),MEM_INDEX(res_ptr,sizeP,4))
INSN2(lea,l ,R(s1_ptr),MEM_INDEX(s1_ptr,sizeP,4))
INSN1(neg,l ,R(sizeP))
INSN2(xor,l ,R(ebx),R(ebx))
ALIGN (3)
L(oop):
INSN2(mov,l ,R(eax),MEM_INDEX(s1_ptr,sizeP,4))
INSN1(mul,l ,R(s2_limb))
INSN2(add,l ,R(eax),R(ebx))
INSN2(adc,l ,R(edx),$0)
INSN2(sub,l ,MEM_INDEX(res_ptr,sizeP,4),R(eax))
INSN2(adc,l ,R(edx),$0)
INSN2(mov,l ,R(ebx),R(edx))
INSN1(inc,l ,R(sizeP))
INSN1(jnz, ,L(oop))
INSN2(mov,l ,R(eax),R(ebx))
INSN1(pop,l ,R(ebp))
INSN1(pop,l ,R(ebx))
INSN1(pop,l ,R(esi))
INSN1(pop,l ,R(edi))
LEAVE
ret
END(__mpn_submul_1)
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