enter.ash

开源的压缩算法 lzo 源码 ,open VPN 就是用这个算法

/* enter.ash -- LZO assembler stuff

   This file is part of the LZO real-time data compression library.

   Copyright (C) 2005 Markus Franz Xaver Johannes Oberhumer
   Copyright (C) 2004 Markus Franz Xaver Johannes Oberhumer
   Copyright (C) 2003 Markus Franz Xaver Johannes Oberhumer
   Copyright (C) 2002 Markus Franz Xaver Johannes Oberhumer
   Copyright (C) 2001 Markus Franz Xaver Johannes Oberhumer
   Copyright (C) 2000 Markus Franz Xaver Johannes Oberhumer
   Copyright (C) 1999 Markus Franz Xaver Johannes Oberhumer
   Copyright (C) 1998 Markus Franz Xaver Johannes Oberhumer
   Copyright (C) 1997 Markus Franz Xaver Johannes Oberhumer
   Copyright (C) 1996 Markus Franz Xaver Johannes Oberhumer
   All Rights Reserved.

   The LZO library is free software; you can redistribute it and/or
   modify it under the terms of the GNU General Public License,
   version 2, as published by the Free Software Foundation.

   The LZO 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 General Public License for more details.

   You should have received a copy of the GNU General Public License
   along with the LZO library; see the file COPYING.
   If not, write to the Free Software Foundation, Inc.,
   51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.

   Markus F.X.J. Oberhumer
   <[e-mail]>
   http://www.oberhumer.com/opensource/lzo/
 */


/***********************************************************************
//
************************************************************************/

        pushl   %ebp
        pushl   %edi
        pushl   %esi
        pushl   %ebx
        pushl   %ecx
        pushl   %edx
        subl    $12,%esp

        cld

        movl    INP,%esi
        movl    OUTP,%edi
#if defined(N_3_EBP)
        movl    $3,%ebp
#endif
#if defined(N_255_EBP)
        movl    $255,%ebp
#endif

#if defined(LZO_TEST_DECOMPRESS_OVERRUN_INPUT)
#if defined(INIT_OVERRUN)
        INIT_OVERRUN
# undef INIT_OVERRUN
#endif
        leal    -3(%esi),%eax       /* 3 == length of EOF code */
        addl    INS,%eax
        movl    %eax,INEND
#endif

#if defined(LZO_TEST_DECOMPRESS_OVERRUN_OUTPUT)
#if defined(INIT_OVERRUN)
        INIT_OVERRUN
# undef INIT_OVERRUN
#endif
        movl    %edi,%eax
        movl    OUTS,%edx
        addl    (%edx),%eax
        movl    %eax,OUTEND
#endif


/*
vi:ts=4
*/