/* lzo1c_d.ash -- assembler implementation of the LZO1C decompression algorithm
This file is part of the LZO real-time data compression library.
Copyright (C) 1996-2014 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
*/