i386/nrv2d_d32_2.ash
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John Reiser
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/*
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; n2d_d32.ash -- ucl_nrv2d_decompress_le32 in 32-bit assembly
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;
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; This file is part of the UCL data compression library.
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;
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; Copyright (C) 1996-2006 Markus Franz Xaver Johannes Oberhumer
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; All Rights Reserved.
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;
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; The UCL library is free software; you can redistribute it and/or
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; modify it under the terms of the GNU General Public License as
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; published by the Free Software Foundation; either version 2 of
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; the License, or (at your option) any later version.
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;
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; The UCL library is distributed in the hope that it will be useful,
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; but WITHOUT ANY WARRANTY; without even the implied warranty of
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; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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; GNU General Public License for more details.
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;
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; You should have received a copy of the GNU General Public License
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; along with the UCL library; see the file COPYING.
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; If not, write to the Free Software Foundation, Inc.,
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; 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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;
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; Markus F.X.J. Oberhumer
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; <markus@oberhumer.com>
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; http://www.oberhumer.com/opensource/ucl/
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;
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; ------------- DECOMPRESSION -------------
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; Input:
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; esi - source
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; edi - dest
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; ebp - -1
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; cld
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; Output:
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; eax - 0
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; ecx - 0
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*/
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// CPU 386
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.macro getbit_n2d one
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.ifc \one, 1
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add ebx, ebx
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jnz 1f
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.endif
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mov ebx, [esi]
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sub esi, -4
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adc ebx, ebx
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1:
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.endm
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#undef getbit
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#define getbit getbit_n2d
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section N2DSMA10
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jmps dcl1_n2d
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decompr_literals_n2d:
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movsb
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section N2DFAS10
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jmps dcl1_n2d
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.balign 8
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section N2DFAS11
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decompr_literalb_n2d:
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mov al, [esi]
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inc esi
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mov [edi], al
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inc edi
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section N2DDEC10
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decompr_loop_n2d:
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add ebx, ebx
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jnz dcl2_n2d
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dcl1_n2d:
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getbit 32
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dcl2_n2d:
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section N2DSMA20
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jc decompr_literals_n2d
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xor eax, eax
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inc eax
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section N2DFAS20
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#ifndef UPX102
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mov al, [edi] // force data cache allocate (PentiumPlain or MMX)
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#endif
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jc decompr_literalb_n2d
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mov eax, 1
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section N2DDEC20
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loop1_n2d:
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getbit 1
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adc eax, eax
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section N2DSMA30
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getbit 1
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jc loopend1_n2d
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section N2DFAS30
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add ebx, ebx
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jnc loopcontinue1_n2d
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jnz loopend1_n2d
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getbit 32
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jc loopend1_n2d
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loopcontinue1_n2d:
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section N2DDEC30
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dec eax
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getbit 1
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adc eax, eax
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jmps loop1_n2d
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loopend1_n2d:
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xor ecx, ecx
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sub eax, 3
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jb decompr_prev_dist_n2d
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shl eax, 8
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mov al, [esi]
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inc esi
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xor eax, -1
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jz decompr_end_n2d
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sar eax, 1 // shift low-bit into carry
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mov ebp, eax
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jmps decompr_ebpeax_n2d
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decompr_prev_dist_n2d:
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getbit 1
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decompr_ebpeax_n2d:
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adc ecx, ecx
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getbit 1
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adc ecx, ecx
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jnz decompr_got_mlen_n2d
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inc ecx
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loop2_n2d:
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getbit 1
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adc ecx, ecx
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section N2DSMA40
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getbit 1
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jnc loop2_n2d
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section N2DFAS40
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add ebx, ebx
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jnc loop2_n2d
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jnz loopend2_n2d
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getbit 32
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jnc loop2_n2d
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loopend2_n2d:
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section N2DDUMM1
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section N2DSMA50
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inc ecx
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inc ecx
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section N2DFAS50
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add ecx, 2
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section N2DDEC50
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decompr_got_mlen_n2d:
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cmp ebp, -0x500
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adc ecx, 1
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section N2DSMA60
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#ifndef UPX102
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push esi
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#else
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mov edx, esi
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#endif
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lea esi, [edi+ebp]
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rep
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movsb
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#ifndef UPX102
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pop esi
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#else
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mov esi, edx
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#endif
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jmp decompr_loop_n2d
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section N2DFAS60
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lea edx, [edi+ebp]
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cmp ebp, -4
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#ifndef UPX102
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mov al, [edi+ecx] // force data cache allocate (PentiumPlain or MMX)
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#endif
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jbe decompr_copy4_n2d
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loop3_n2d:
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mov al, [edx]
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inc edx
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mov [edi], al
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inc edi
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dec ecx
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jnz loop3_n2d
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jmp decompr_loop_n2d
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section N2DFAS61
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.balign 4
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decompr_copy4_n2d:
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mov eax, [edx]
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add edx, 4
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mov [edi], eax
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add edi, 4
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sub ecx, 4
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ja decompr_copy4_n2d
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add edi, ecx
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jmp decompr_loop_n2d
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section N2DDEC60
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decompr_end_n2d:
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section NRV2DEND
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// vi:ts=8:et
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@@ -94,10 +94,9 @@ section LEXEC010
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// align 8
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#include "arch/i386/nrv2b_d32_2.ash"
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//#include "arch/i386/nrv2d_d32.ash"
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#include "arch/i386/nrv2d_d32_2.ash"
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#include "arch/i386/nrv2e_d32_2.ash"
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//#include "arch/i386/lzma_d.ash"
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//#include "arch/i386/macros.ash"
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//#include "arch/i386/lzma_d_2.ash"
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cjt32 0
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section LEXEC015
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