+++ /dev/null
-dnl x86 mpn_rshift -- mpn right shift.
-
-dnl Copyright (C) 1992, 1994, 1996, 1999, 2000 Free Software Foundation,
-dnl Inc.
-dnl
-dnl This file is part of the GNU MP Library.
-dnl
-dnl The GNU MP Library is free software; you can redistribute it and/or
-dnl modify it under the terms of the GNU Lesser General Public License as
-dnl published by the Free Software Foundation; either version 2.1 of the
-dnl License, or (at your option) any later version.
-dnl
-dnl The GNU MP Library is distributed in the hope that it will be useful,
-dnl but WITHOUT ANY WARRANTY; without even the implied warranty of
-dnl MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
-dnl Lesser General Public License for more details.
-dnl
-dnl You should have received a copy of the GNU Lesser General Public
-dnl License along with the GNU MP Library; see the file COPYING.LIB. If
-dnl not, write to the Free Software Foundation, Inc., 59 Temple Place -
-dnl Suite 330, Boston, MA 02111-1307, USA.
-
-
-include(`../config.m4')
-
-
-C mp_limb_t mpn_rshift (mp_ptr dst, mp_srcptr src, mp_size_t size,
-C unsigned shift);
-
-defframe(PARAM_SHIFT,16)
-defframe(PARAM_SIZE, 12)
-defframe(PARAM_SRC, 8)
-defframe(PARAM_DST, 4)
-
- .text
- ALIGN(8)
-PROLOGUE(mpn_rshift)
-
- pushl %edi
- pushl %esi
- pushl %ebx
-deflit(`FRAME',12)
-
- movl PARAM_DST,%edi
- movl PARAM_SRC,%esi
- movl PARAM_SIZE,%edx
- movl PARAM_SHIFT,%ecx
-
- leal -4(%edi,%edx,4),%edi
- leal (%esi,%edx,4),%esi
- negl %edx
-
- movl (%esi,%edx,4),%ebx C read least significant limb
- xorl %eax,%eax
- shrdl( %cl, %ebx, %eax) C compute carry limb
- incl %edx
- jz L(end)
- pushl %eax C push carry limb onto stack
- testb $1,%dl
- jnz L(1) C enter loop in the middle
- movl %ebx,%eax
-
- ALIGN(8)
-L(oop): movl (%esi,%edx,4),%ebx C load next higher limb
- shrdl( %cl, %ebx, %eax) C compute result limb
- movl %eax,(%edi,%edx,4) C store it
- incl %edx
-L(1): movl (%esi,%edx,4),%eax
- shrdl( %cl, %eax, %ebx)
- movl %ebx,(%edi,%edx,4)
- incl %edx
- jnz L(oop)
-
- shrl %cl,%eax C compute most significant limb
- movl %eax,(%edi) C store it
-
- popl %eax C pop carry limb
-
- popl %ebx
- popl %esi
- popl %edi
- ret
-
-L(end): shrl %cl,%ebx C compute most significant limb
- movl %ebx,(%edi) C store it
-
- popl %ebx
- popl %esi
- popl %edi
- ret
-
-EPILOGUE()