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Diffstat (limited to 'asm/i386/src/lzo1f_d.ash')
| -rw-r--r-- | asm/i386/src/lzo1f_d.ash | 179 |
1 files changed, 179 insertions, 0 deletions
diff --git a/asm/i386/src/lzo1f_d.ash b/asm/i386/src/lzo1f_d.ash new file mode 100644 index 0000000..97a103c --- /dev/null +++ b/asm/i386/src/lzo1f_d.ash @@ -0,0 +1,179 @@ +/* lzo1f_d.ash -- assembler implementation of the LZO1F decompression algorithm + + This file is part of the LZO real-time data compression library. + + Copyright (C) 2011 Markus Franz Xaver Johannes Oberhumer + Copyright (C) 2010 Markus Franz Xaver Johannes Oberhumer + Copyright (C) 2009 Markus Franz Xaver Johannes Oberhumer + Copyright (C) 2008 Markus Franz Xaver Johannes Oberhumer + Copyright (C) 2007 Markus Franz Xaver Johannes Oberhumer + Copyright (C) 2006 Markus Franz Xaver Johannes Oberhumer + 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 as + published by the Free Software Foundation; either version 2 of + the License, or (at your option) any later version. + + 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 + <markus@oberhumer.com> + http://www.oberhumer.com/opensource/lzo/ + */ + + +/*********************************************************************** +// +************************************************************************/ + + ALIGN3 +.L0: + xorl %eax,%eax + movb (%esi),%al + incl %esi + cmpb $31,%al + ja .LM2 + + orb %al,%al + movl %eax,%ecx + jnz .L2 +1: + LODSB + orb %al,%al + jnz 2f + addl N_255,%ecx + jmp 1b +2: + lea 31(%eax,%ecx),%ecx +.L2: + TEST_OP((%edi,%ecx),%ebx) + TEST_IP((%esi,%ecx),%ebx) + movb %cl,%al + shrl $2,%ecx + rep + movsl + andb $3,%al + jz 1f + movl (%esi),%ebx + addl %eax,%esi + movl %ebx,(%edi) + addl %eax,%edi +1: + movb (%esi),%al + incl %esi +.LM1: + cmpb $31,%al + jbe .LM21 + +.LM2: + cmpb $223,%al + ja .LM3 + + movl %eax,%ecx + shrl $2,%eax + lea -1(%edi),%edx + andb $7,%al + shrl $5,%ecx + movl %eax,%ebx + + movb (%esi),%al + leal (%ebx,%eax,8),%eax + incl %esi +.LM5: + subl %eax,%edx + addl $2,%ecx + xchgl %edx,%esi + TEST_LOOKBEHIND(%esi) + TEST_OP((%edi,%ecx),%ebx) + cmpl $6,%ecx + jb 1f + cmpl $4,%eax + jb 1f + movb %cl,%al + shrl $2,%ecx + rep + movsl + andb $3,%al + movb %al,%cl +1: + rep + movsb + movl %edx,%esi +.LN1: + movb -2(%esi),%cl + andl $3,%ecx + jz .L0 + movl (%esi),%eax + addl %ecx,%esi + movl %eax,(%edi) + addl %ecx,%edi + xorl %eax,%eax + movb (%esi),%al + incl %esi + jmp .LM1 +.LM21: + TEST_OP(3(%edi),%edx) + shrl $2,%eax + leal -0x801(%edi),%edx + movl %eax,%ecx + movb (%esi),%al + incl %esi + leal (%ecx,%eax,8),%eax + subl %eax,%edx + TEST_LOOKBEHIND(%edx) + movl (%edx),%eax + movl %eax,(%edi) + addl $3,%edi + jmp .LN1 +1: + LODSB + orb %al,%al + jnz 2f + addl N_255,%ecx + jmp 1b +2: + lea 31(%eax,%ecx),%ecx + jmp .LM4 + + ALIGN3 +.LM3: + andb $31,%al + movl %eax,%ecx + jz 1b +.LM4: + movl %edi,%edx + movw (%esi),%ax + addl $2,%esi + shrl $2,%eax + jnz .LM5 + +.LEOF: +/**** xorl %eax,%eax eax=0 from above */ + + cmpl $1,%ecx /* ecx must be 1 */ + setnz %al + + +/* +vi:ts=4 +*/ + |