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kolibrios/programs/other/kpack/trunk/lzma_decompress.inc
Marat Zakiyanov (Mario79) 6f90a83af7 Kpack - fully roaming LZMA code is now 
git-svn-id: svn://kolibrios.org@1681 a494cfbc-eb01-0410-851d-a64ba20cac60
2010-10-31 11:06:54 +00:00

360 lines
7.0 KiB
PHP
Raw Blame History

;* Call: ***************************************************************
lzma_decompress:
push esi
push edi
push ebx
push ebp
mov esi,[esp+20]
xor ebp,ebp
mov edi,unpack.code_
inc esi
lodsd
bswap eax
stosd
xor eax,eax
dec eax
stosd
stosd
stosd
stosd
xchg esi,eax
stosd
mov ecx,0x1F36
mov eax,1024
mov edi,unpack.p
rep stosd
mov edi,[esp+24]
mov ebx, edi
add ebx,[esp+28]
;--------------------------------------------------------------------
.main_loop:
cmp edi,ebx
jnb .main_loop_done
mov edx,edi
and edx,3
push eax
mov eax,ebp
shl eax,6
lea eax,[eax+edx*4+unpack.p]
call RangeDecoderBitDecode
pop eax
jb .labl_06
movzx eax,al
shr eax,5
imul eax,eax,3072
add eax,unpack.p+0x1CD8
mov cl,1
cmp ebp,7
jb .labl_02
mov dl,[edi+esi]
;--------------------------------------------------------------------
.labl_01:
add dl,dl
setb ch
push eax
lea eax,[eax+ecx*4+1024]
call RangeDecoderBitDecode
pop eax
adc cl,cl
jb .labl_03
xor ch,cl
test ch,1
mov ch,0
je .labl_01
;--------------------------------------------------------------------
.labl_02:
push eax
lea eax,[eax+ecx*4]
call RangeDecoderBitDecode
pop eax
adc cl,cl
jnb .labl_02
;--------------------------------------------------------------------
.labl_03:
mov eax,ebp
cmp al,4
jb .labl_04
cmp al,10
mov al,3
jb .labl_04
mov al,6
;--------------------------------------------------------------------
.labl_04:
sub ebp,eax
xchg ecx,eax
;--------------------------------------------------------------------
.main_loop_1:
stosb
jmp .main_loop
;--------------------------------------------------------------------
.labl_06:
lea eax,[unpack.p+768+ebp*4]
call RangeDecoderBitDecode
jnb .labl_09
add eax,48
call RangeDecoderBitDecode
jb .labl_07
mov eax, ebp
shl eax,6
lea eax,[eax+edx*4+unpack.p+0x3C0]
call RangeDecoderBitDecode
jb .labl_08
cmp ebp,7
sbb ebp,ebp
lea ebp,[ebp+ebp+11]
mov al,[edi+esi]
jmp .main_loop_1
;--------------------------------------------------------------------
.labl_07:
add eax,48
call RangeDecoderBitDecode
xchg esi,[unpack.rep0]
jnb .labl_08
add eax,48
call RangeDecoderBitDecode
xchg esi,[unpack.rep1]
jnb .labl_08
xchg esi,[unpack.rep2]
;--------------------------------------------------------------------
.labl_08:
mov eax,unpack.p+0x14D0
call LzmaLenDecode
push 8
jmp .labl_17
;--------------------------------------------------------------------
.labl_09:
xchg esi,[unpack.rep0]
xchg esi,[unpack.rep1]
mov [unpack.rep2],esi
mov eax,unpack.p+0xCC8
call LzmaLenDecode
push 3
pop eax
cmp eax,ecx
jb .labl_10
mov eax,ecx
;--------------------------------------------------------------------
.labl_10:
push ecx
push 6
pop ecx
shl eax,cl
shl eax,2
add eax,unpack.p+0x6C0
call RangeDecoderBitTreeDecode
mov esi,ecx
cmp ecx,4
jb .labl_16
push ecx
xor eax,eax
inc eax
shr ecx,1
adc al,al
dec ecx
shl eax,cl
mov esi, eax
pop edx
cmp edx,14
jnb .labl_11
sub eax,edx
shl eax,2
add eax,unpack.p+0xABC
jmp .labl_14
;--------------------------------------------------------------------
.labl_11:
sub ecx,4
xor eax,eax
;--------------------------------------------------------------------
.labl_12:
shr dword [unpack.range],1
add eax, eax
mov edx,[unpack.code_]
sub edx,[unpack.range]
jb .labl_13
mov [unpack.code_],edx
inc eax
;--------------------------------------------------------------------
.labl_13:
call RangeDecoderBitDecode_1
loop .labl_12
mov cl,4
shl eax,cl
add esi,eax
mov eax,unpack.p+0xC88
;--------------------------------------------------------------------
.labl_14:
push edi
push ecx
xor edx,edx
inc edx
xor edi,edi
;--------------------------------------------------------------------
.labl_15:
push eax
lea eax,[eax+edx*4]
call RangeDecoderBitDecode
lahf
adc edx,edx
sahf
rcr edi,1
pop eax
loop .labl_15
pop ecx
rol edi,cl
add esi,edi
pop edi
;--------------------------------------------------------------------
.labl_16:
pop ecx
not esi
push 7
;--------------------------------------------------------------------
.labl_17:
cmp ebp,7
pop ebp
jb .labl_18
inc ebp
inc ebp
inc ebp
;--------------------------------------------------------------------
.labl_18:
inc ecx
push esi
add esi,edi
rep movsb
lodsb
pop esi
jmp .main_loop_1
;--------------------------------------------------------------------
.main_loop_done:
pop ebp
pop ebx
pop edi
pop esi
ret 12
;*****************************************************************************
;* Call: ***************************************************************
RangeDecoderBitDecode:
; in: eax->prob
; out: CF=bit; destroys eax
push edx
mov edx,[unpack.range]
shr edx,11
imul edx,[eax]
cmp [unpack.code_],edx
jnb .2
mov [unpack.range],edx
mov edx,2048
sub edx,[eax]
shr edx,5
add [eax],edx
;--------------------------------------------------------------------
.1:
pushfd
call RangeDecoderBitDecode_1
popfd
pop edx
ret
;--------------------------------------------------------------------
.2:
sub [unpack.range],edx
sub [unpack.code_],edx
mov edx,[eax]
shr edx,5
sub [eax],edx
stc
jmp .1
;***********************************************************************
;* Call: ***************************************************************
RangeDecoderBitDecode_1:
cmp byte [unpack.range+3],0
jne @f
shl dword [unpack.range],8
shl dword [unpack.code_],8
push eax
mov eax,[unpack.rep3]
mov al,[eax]
inc dword [unpack.rep3]
mov [unpack.code_],al
pop eax
;--------------------------------------------------------------------
@@:
ret
;***********************************************************************
;* Call: ***************************************************************
LzmaLenDecode:
; in: eax->prob, edx=posState
; out: ecx=len
call RangeDecoderBitDecode
jnb .2
add eax,4
call RangeDecoderBitDecode
jb .1
mov cl,3
shl edx,cl
lea eax,[eax+edx*4+516]
call RangeDecoderBitTreeDecode
add ecx,8
ret
;--------------------------------------------------------------------
.1:
add eax,1028
mov cl,8
call RangeDecoderBitTreeDecode
add ecx,16
ret
;--------------------------------------------------------------------
.2:
mov cl,3
shl edx,cl
lea eax,[eax+edx*4+8]
;***********************************************************************
;* Call: ***************************************************************
RangeDecoderBitTreeDecode:
; in: eax->probs,ecx=numLevels
; out: ecx=length; destroys edx
push edi
xor edx,edx
inc edx
mov edi,edx
xchg edi, eax
;--------------------------------------------------------------------
@@:
push eax
lea eax,[edi+edx*4]
call RangeDecoderBitDecode
pop eax
adc dl,dl
add al,al
loop @b
sub dl,al
pop edi
mov ecx,edx
ret
;***********************************************************************
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