mirror of
https://github.com/KolibriOS/kolibrios.git
synced 2024-12-24 23:56:49 +03:00
394 lines
7.4 KiB
NASM
394 lines
7.4 KiB
NASM
; Exports only one function:
|
|
; void __stdcall lzma_decompress(
|
|
; const void* source,
|
|
; void* destination,
|
|
; unsigned dest_length);
|
|
|
|
format COFF
|
|
|
|
section '.text' code
|
|
|
|
pb equ 2 ; pos state bits
|
|
lp equ 0 ; literal pos state bits
|
|
lc equ 3 ; literal context bits
|
|
posStateMask equ ((1 shl pb)-1)
|
|
literalPosMask equ ((1 shl lp)-1)
|
|
|
|
kNumPosBitsMax = 4
|
|
kNumPosStatesMax = (1 shl kNumPosBitsMax)
|
|
|
|
kLenNumLowBits = 3
|
|
kLenNumLowSymbols = (1 shl kLenNumLowBits)
|
|
kLenNumMidBits = 3
|
|
kLenNumMidSymbols = (1 shl kLenNumMidBits)
|
|
kLenNumHighBits = 8
|
|
kLenNumHighSymbols = (1 shl kLenNumHighBits)
|
|
|
|
LenChoice = 0
|
|
LenChoice2 = 1
|
|
LenLow = 2
|
|
LenMid = (LenLow + (kNumPosStatesMax shl kLenNumLowBits))
|
|
LenHigh = (LenMid + (kNumPosStatesMax shl kLenNumMidBits))
|
|
kNumLenProbs = (LenHigh + kLenNumHighSymbols)
|
|
|
|
kNumStates = 12
|
|
kNumLitStates = 7
|
|
kStartPosModelIndex = 4
|
|
kEndPosModelIndex = 14
|
|
kNumFullDistances = (1 shl (kEndPosModelIndex/2))
|
|
kNumPosSlotBits = 6
|
|
kNumLenToPosStates = 4
|
|
kNumAlignBits = 4
|
|
kAlignTableSize = (1 shl kNumAlignBits)
|
|
kMatchMinLen = 2
|
|
|
|
IsMatch = 0
|
|
IsRep = 0xC0 ; (IsMatch + (kNumStates shl kNumPosBitsMax))
|
|
IsRepG0 = 0xCC ; (IsRep + kNumStates)
|
|
IsRepG1 = 0xD8 ; (IsRepG0 + kNumStates)
|
|
IsRepG2 = 0xE4 ; (IsRepG1 + kNumStates)
|
|
IsRep0Long = 0xF0 ; (IsRepG2 + kNumStates)
|
|
PosSlot = 0x1B0 ; (IsRep0Long + (kNumStates shl kNumPosBitsMax))
|
|
SpecPos = 0x2B0 ; (PosSlot + (kNumLenToPosStates shl kNumPosSlotBits))
|
|
Align_ = 0x322 ; (SpecPos + kNumFullDistances - kEndPosModelIndex)
|
|
Lencoder = 0x332 ; (Align_ + kAlignTableSize)
|
|
RepLencoder = 0x534 ; (Lencoder + kNumLenProbs)
|
|
Literal = 0x736 ; (RepLencoder + kNumLenProbs)
|
|
|
|
LZMA_BASE_SIZE = 1846 ; must be ==Literal
|
|
LZMA_LIT_SIZE = 768
|
|
|
|
kNumTopBits = 24
|
|
kTopValue = (1 shl kNumTopBits)
|
|
|
|
kNumBitModelTotalBits = 11
|
|
kBitModelTotal = (1 shl kNumBitModelTotalBits)
|
|
kNumMoveBits = 5
|
|
|
|
RangeDecoderBitDecode:
|
|
; in: eax->prob
|
|
; out: CF=bit
|
|
push edx
|
|
mov edx, [range]
|
|
shr edx, kNumBitModelTotalBits
|
|
imul edx, [eax]
|
|
cmp [code_], edx
|
|
jae .ae
|
|
mov [range], edx
|
|
mov edx, kBitModelTotal
|
|
sub edx, [eax]
|
|
shr edx, kNumMoveBits
|
|
add [eax], edx
|
|
.n:
|
|
pushfd
|
|
call update_decoder
|
|
popfd
|
|
pop edx
|
|
ret
|
|
.ae:
|
|
sub [range], edx
|
|
sub [code_], edx
|
|
mov edx, [eax]
|
|
shr edx, kNumMoveBits
|
|
sub [eax], edx
|
|
stc
|
|
jmp .n
|
|
|
|
update_decoder:
|
|
cmp byte [range+3], 0 ;cmp dword [range], kTopValue
|
|
jnz @f ;jae @f
|
|
shl dword [range], 8
|
|
shl dword [code_], 8
|
|
push eax
|
|
mov eax, [inptr]
|
|
mov al, [eax]
|
|
inc dword [inptr]
|
|
mov byte [code_], al
|
|
pop eax
|
|
@@: ret
|
|
|
|
LzmaLenDecode:
|
|
; in: eax->prob, edx=posState
|
|
; out: ecx=len
|
|
|
|
; LenChoice==0
|
|
; add eax, LenChoice*4
|
|
call RangeDecoderBitDecode
|
|
jnc .0
|
|
add eax, (LenChoice2-LenChoice)*4
|
|
call RangeDecoderBitDecode
|
|
jc @f
|
|
mov cl, kLenNumMidBits
|
|
shl edx, cl
|
|
lea eax, [eax + (LenMid-LenChoice2)*4 + edx*4]
|
|
call RangeDecoderBitTreeDecode
|
|
add ecx, kLenNumLowSymbols
|
|
ret
|
|
@@:
|
|
add eax, (LenHigh-LenChoice2)*4
|
|
mov cl, kLenNumHighBits
|
|
call RangeDecoderBitTreeDecode
|
|
add ecx, kLenNumLowSymbols + kLenNumMidSymbols
|
|
ret
|
|
.0:
|
|
mov cl, kLenNumLowBits
|
|
shl edx, cl
|
|
lea eax, [eax + LenLow*4 + edx*4]
|
|
RangeDecoderBitTreeDecode:
|
|
; in: eax->probs,ecx=numLevels
|
|
; out: ecx=length; destroys edx
|
|
push edi
|
|
xor edx, edx
|
|
inc edx
|
|
mov edi, edx
|
|
xchg eax, edi
|
|
@@:
|
|
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
|
|
|
|
; void __stdcall lzma_decompress(
|
|
; const void* source,
|
|
; void* destination,
|
|
; unsigned dest_length);
|
|
lzma_decompress equ _lzma_decompress@12
|
|
public lzma_decompress
|
|
lzma_decompress:
|
|
push esi edi ebx ebp
|
|
mov esi, [esp+4*4+4] ; source
|
|
xor ebp, ebp
|
|
mov edi, code_
|
|
inc esi
|
|
lodsd
|
|
bswap eax
|
|
stosd
|
|
xor eax, eax
|
|
dec eax
|
|
stosd
|
|
stosd
|
|
stosd
|
|
stosd
|
|
xchg eax, esi
|
|
stosd
|
|
mov ecx, Literal + (LZMA_LIT_SIZE shl (lc+lp))
|
|
mov eax, kBitModelTotal/2
|
|
mov edi, p
|
|
rep stosd
|
|
mov edi, [esp+4*4+8] ; destination
|
|
mov ebx, edi
|
|
add ebx, [esp+4*4+12] ; dest_length
|
|
.main_loop:
|
|
cmp edi, ebx
|
|
jae .main_loop_done
|
|
mov edx, edi
|
|
and edx, posStateMask
|
|
push eax ; al = previous byte
|
|
mov eax, ebp
|
|
shl eax, kNumPosBitsMax+2
|
|
lea eax, [p + IsMatch*4 + eax + edx*4]
|
|
call RangeDecoderBitDecode
|
|
pop eax
|
|
jc .1
|
|
movzx eax, al
|
|
if literalPosMask
|
|
mov ah, dl
|
|
and ah, literalPosMask
|
|
end if
|
|
shr eax, 8-lc
|
|
imul eax, LZMA_LIT_SIZE*4
|
|
add eax, p+Literal*4
|
|
mov cl, 1
|
|
cmp ebp, kNumLitStates
|
|
jb .literal
|
|
mov dl, [edi + esi]
|
|
.lx0:
|
|
add dl, dl
|
|
setc ch
|
|
push eax
|
|
lea eax, [eax+ecx*4+0x100*4]
|
|
call RangeDecoderBitDecode
|
|
pop eax
|
|
adc cl, cl
|
|
jc .lx1
|
|
xor ch, cl
|
|
test ch, 1
|
|
mov ch, 0
|
|
jz .lx0
|
|
.literal:
|
|
@@:
|
|
push eax
|
|
lea eax, [eax+ecx*4]
|
|
call RangeDecoderBitDecode
|
|
pop eax
|
|
adc cl, cl
|
|
jnc @b
|
|
.lx1:
|
|
mov eax, ebp
|
|
cmp al, 4
|
|
jb @f
|
|
cmp al, 10
|
|
mov al, 3
|
|
jb @f
|
|
mov al, 6
|
|
@@: sub ebp, eax
|
|
xchg eax, ecx
|
|
.stosb_main_loop:
|
|
stosb
|
|
jmp .main_loop
|
|
.1:
|
|
lea eax, [p + IsRep*4 + ebp*4]
|
|
call RangeDecoderBitDecode
|
|
jnc .10
|
|
add eax, (IsRepG0 - IsRep)*4 ;lea eax, [p + IsRepG0*4 + ebp*4]
|
|
call RangeDecoderBitDecode
|
|
jc .111
|
|
mov eax, ebp
|
|
shl eax, kNumPosBitsMax+2
|
|
lea eax, [p + IsRep0Long*4 + eax + edx*4]
|
|
call RangeDecoderBitDecode
|
|
jc .1101
|
|
cmp ebp, 7
|
|
sbb ebp, ebp
|
|
lea ebp, [ebp+ebp+11]
|
|
mov al, [edi + esi]
|
|
jmp .stosb_main_loop
|
|
.111:
|
|
add eax, (IsRepG1 - IsRepG0) * 4 ;lea eax, [p + IsRepG1*4 + ebp*4]
|
|
call RangeDecoderBitDecode
|
|
xchg esi, [rep1]
|
|
jnc @f
|
|
add eax, (IsRepG2 - IsRepG1) * 4 ;lea eax, [p + IsRepG2*4 + ebp*4]
|
|
call RangeDecoderBitDecode
|
|
xchg esi, [rep2]
|
|
jnc @f
|
|
xchg esi, [rep3]
|
|
@@:
|
|
.1101:
|
|
mov eax, p + RepLencoder*4
|
|
call LzmaLenDecode
|
|
push 8
|
|
jmp .rmu
|
|
.10:
|
|
xchg esi, [rep1]
|
|
xchg esi, [rep2]
|
|
mov [rep3], esi
|
|
mov eax, p + Lencoder*4
|
|
call LzmaLenDecode
|
|
push kNumLenToPosStates-1
|
|
pop eax
|
|
cmp eax, ecx
|
|
jb @f
|
|
mov eax, ecx
|
|
@@:
|
|
push ecx
|
|
push kNumPosSlotBits
|
|
pop ecx
|
|
shl eax, cl
|
|
shl eax, 2
|
|
add eax, p+PosSlot*4
|
|
call RangeDecoderBitTreeDecode
|
|
mov esi, ecx
|
|
cmp ecx, kStartPosModelIndex
|
|
jb .l6
|
|
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, kEndPosModelIndex
|
|
jae .l5
|
|
sub eax, edx
|
|
shl eax, 2
|
|
add eax, p + (SpecPos - 1)*4
|
|
jmp .l59
|
|
.l5:
|
|
sub ecx, kNumAlignBits
|
|
; call RangeDecoderDecodeDirectBits
|
|
;RangeDecoderDecodeDirectBits:
|
|
xor eax, eax
|
|
.l:
|
|
shr dword [range], 1
|
|
add eax, eax
|
|
mov edx, [code_]
|
|
sub edx, [range]
|
|
jb @f
|
|
mov [code_], edx
|
|
inc eax
|
|
@@:
|
|
call update_decoder
|
|
loop .l
|
|
; ret
|
|
mov cl, kNumAlignBits
|
|
shl eax, cl
|
|
add esi, eax
|
|
mov eax, p+Align_*4
|
|
.l59:
|
|
; call RangeDecoderReverseBitTreeDecode_addesi
|
|
;_RangeDecoderReverseBitTreeDecode_addesi:
|
|
; in: eax->probs,ecx=numLevels
|
|
; out: esi+=length; destroys edx
|
|
push edi ecx
|
|
xor edx, edx
|
|
inc edx
|
|
xor edi, edi
|
|
@@:
|
|
push eax
|
|
lea eax, [eax+edx*4]
|
|
call RangeDecoderBitDecode
|
|
lahf
|
|
adc edx, edx
|
|
sahf
|
|
rcr edi, 1
|
|
pop eax
|
|
loop @b
|
|
pop ecx
|
|
rol edi, cl
|
|
add esi, edi
|
|
pop edi
|
|
; ret
|
|
.l6:
|
|
pop ecx
|
|
not esi
|
|
push 7
|
|
.rmu:
|
|
cmp ebp, 7
|
|
pop ebp
|
|
jb @f
|
|
inc ebp
|
|
inc ebp
|
|
inc ebp
|
|
@@:
|
|
.repmovsb:
|
|
inc ecx
|
|
push esi
|
|
add esi, edi
|
|
rep movsb
|
|
lodsb
|
|
pop esi
|
|
jmp .stosb_main_loop
|
|
.main_loop_done:
|
|
pop ebp ebx edi esi
|
|
ret 12
|
|
|
|
section '.bss' data
|
|
p rd LZMA_BASE_SIZE + (LZMA_LIT_SIZE shl (lc+lp))
|
|
code_ dd ?
|
|
range dd ?
|
|
rep1 dd ?
|
|
rep2 dd ?
|
|
rep3 dd ?
|
|
inptr dd ?
|
|
previousByte db ?
|