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Diffstat (limited to 'asm/i386/src/lzo1c_d.ash')
| -rw-r--r-- | asm/i386/src/lzo1c_d.ash | 187 |
1 files changed, 187 insertions, 0 deletions
diff --git a/asm/i386/src/lzo1c_d.ash b/asm/i386/src/lzo1c_d.ash new file mode 100644 index 0000000..56622ab --- /dev/null +++ b/asm/i386/src/lzo1c_d.ash @@ -0,0 +1,187 @@ +/* lzo1c_d.ash -- assembler implementation of the LZO1C 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 +.L1: + xorl %eax,%eax + movb (%esi),%al + incl %esi + cmpb $32,%al + jnb .LMATCH + + orb %al,%al + jz .L12 + movl %eax,%ecx +.LIT: + TEST_OP((%edi,%ecx),%ebx) + TEST_IP((%esi,%ecx),%ebx) + rep + movsb +.LM1: + movb (%esi),%al + incl %esi + + cmpb $32,%al + jb .LM2 +.LMATCH: + cmpb $64,%al + jb .LN3 + + movl %eax,%ecx + andb $31,%al + leal -1(%edi),%edx + shrl $5,%ecx + subl %eax,%edx + movb (%esi),%al + incl %esi + + shll $5,%eax + subl %eax,%edx + incl %ecx + xchgl %esi,%edx + TEST_LOOKBEHIND(%esi) + TEST_OP((%edi,%ecx),%ebx) + rep + movsb + movl %edx,%esi + jmp .L1 + + ALIGN3 +.L12: + LODSB + leal 32(%eax),%ecx + cmpb $248,%al + jb .LIT + + movl $280,%ecx + subb $248,%al + jz .L11 + xchgl %eax,%ecx + xorb %al,%al + shll %cl,%eax + xchgl %eax,%ecx +.L11: + TEST_OP((%edi,%ecx),%ebx) + TEST_IP((%esi,%ecx),%ebx) + rep + movsb + jmp .L1 + + ALIGN3 +.LM2: + leal -1(%edi),%edx + subl %eax,%edx + LODSB + shll $5,%eax + subl %eax,%edx + xchgl %esi,%edx + TEST_LOOKBEHIND(%esi) + TEST_OP(4(%edi),%ebx) + movsb + movsb + movsb + movl %edx,%esi + movsb + xorl %eax,%eax + jmp .LM1 +.LN3: + andb $31,%al + movl %eax,%ecx + jnz .LN6 + movb $31,%cl +.LN4: + LODSB + orb %al,%al + jnz .LN5 + addl N_255,%ecx + jmp .LN4 + + ALIGN3 +.LN5: + addl %eax,%ecx +.LN6: + movb (%esi),%al + incl %esi + + movl %eax,%ebx + andb $63,%al + movl %edi,%edx + subl %eax,%edx + + movb (%esi),%al + incl %esi + + shll $6,%eax + subl %eax,%edx + cmpl %edi,%edx + jz .LEOF + + xchgl %edx,%esi + leal 3(%ecx),%ecx + TEST_LOOKBEHIND(%esi) + TEST_OP((%edi,%ecx),%eax) + rep + movsb + + movl %edx,%esi + xorl %eax,%eax + shrl $6,%ebx + movl %ebx,%ecx + jnz .LIT + jmp .L1 + +.LEOF: +/**** xorl %eax,%eax eax=0 from above */ + + cmpl $1,%ecx /* ecx must be 1 */ + setnz %al + + +/* +vi:ts=4 +*/ + |