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Rev | Author | Line No. | Line |
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2288 | clevermous | 1 | ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; |
2 | ;; ;; |
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2455 | mario79 | 3 | ;; Copyright (C) KolibriOS team 2004-2011. All rights reserved. ;; |
2288 | clevermous | 4 | ;; Distributed under terms of the GNU General Public License ;; |
5 | ;; ;; |
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6 | ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; |
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7 | |||
8 | $Revision: 2455 $ |
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9 | |||
10 | |||
11 | ; void __stdcall unpack(void* packed_data, void* unpacked_data); |
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12 | unpack: |
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13 | pushad |
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14 | mov esi, [esp+32+4] |
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15 | mov edi, [esp+32+8] |
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16 | mov eax, [esi+8] |
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17 | and al, 0xC0 |
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18 | cmp al, 0xC0 |
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19 | jz .failed |
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20 | mov eax, [esi+8] |
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21 | push eax |
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22 | add esi, 12 |
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23 | and al, not 0xC0 |
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24 | dec al |
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25 | jz .lzma |
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26 | .failed: |
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27 | pop eax |
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28 | popad |
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29 | ret 8 |
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30 | .lzma: |
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31 | call .lzma_unpack |
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32 | .common: |
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33 | pop eax |
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34 | test al, 0x80 |
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35 | jnz .ctr1 |
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36 | test al, 0x40 |
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37 | jz .ok |
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38 | lodsd |
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39 | mov ecx, eax |
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40 | jecxz .ok |
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41 | mov dl, [esi] |
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42 | mov esi, [esp+32+8] |
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43 | .c1: |
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44 | lodsb |
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45 | sub al, 0E8h |
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46 | cmp al, 1 |
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47 | ja .c1 |
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48 | cmp byte [esi], dl |
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49 | jnz .c1 |
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50 | lodsd |
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51 | ; "bswap eax" is not supported on i386 |
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52 | shr ax, 8 |
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53 | ror eax, 16 |
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54 | xchg al, ah |
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55 | sub eax, esi |
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56 | add eax, [esp+32+8] |
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57 | mov [esi-4], eax |
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58 | loop .c1 |
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59 | .ok: |
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60 | popad |
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61 | ret 8 |
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62 | .ctr1: |
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63 | lodsd |
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64 | mov ecx, eax |
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65 | jecxz .ok |
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66 | mov dl, [esi] |
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67 | mov esi, [esp+32+8] |
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68 | .c2: |
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69 | lodsb |
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70 | @@: |
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71 | cmp al, 0xF |
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72 | jnz .f |
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73 | lodsb |
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74 | cmp al, 80h |
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75 | jb @b |
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76 | cmp al, 90h |
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77 | jb @f |
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78 | .f: |
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79 | sub al, 0E8h |
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80 | cmp al, 1 |
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81 | ja .c2 |
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82 | @@: |
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83 | cmp byte [esi], dl |
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84 | jnz .c2 |
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85 | lodsd |
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86 | shr ax, 8 |
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87 | ror eax, 16 |
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88 | xchg al, ah |
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89 | sub eax, esi |
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90 | add eax, [esp+32+8] |
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91 | mov [esi-4], eax |
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92 | loop .c2 |
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93 | jmp .ok |
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94 | |||
95 | .lzma_unpack: |
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96 | |||
97 | .pb = 2 ; pos state bits |
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98 | .lp = 0 ; literal pos state bits |
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99 | .lc = 3 ; literal context bits |
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100 | .posStateMask = ((1 shl .pb)-1) |
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101 | .literalPosMask = ((1 shl .lp)-1) |
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102 | |||
103 | .kNumPosBitsMax = 4 |
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104 | .kNumPosStatesMax = (1 shl .kNumPosBitsMax) |
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105 | |||
106 | .kLenNumLowBits = 3 |
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107 | .kLenNumLowSymbols = (1 shl .kLenNumLowBits) |
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108 | .kLenNumMidBits = 3 |
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109 | .kLenNumMidSymbols = (1 shl .kLenNumMidBits) |
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110 | .kLenNumHighBits = 8 |
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111 | .kLenNumHighSymbols = (1 shl .kLenNumHighBits) |
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112 | |||
113 | .LenChoice = 0 |
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114 | .LenChoice2 = 1 |
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115 | .LenLow = 2 |
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116 | .LenMid = (.LenLow + (.kNumPosStatesMax shl .kLenNumLowBits)) |
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117 | .LenHigh = (.LenMid + (.kNumPosStatesMax shl .kLenNumMidBits)) |
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118 | .kNumLenProbs = (.LenHigh + .kLenNumHighSymbols) |
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119 | |||
120 | .kNumStates = 12 |
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121 | .kNumLitStates = 7 |
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122 | .kStartPosModelIndex = 4 |
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123 | .kEndPosModelIndex = 14 |
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124 | .kNumFullDistances = (1 shl (.kEndPosModelIndex/2)) |
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125 | .kNumPosSlotBits = 6 |
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126 | .kNumLenToPosStates = 4 |
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127 | .kNumAlignBits = 4 |
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128 | .kAlignTableSize = (1 shl .kNumAlignBits) |
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129 | .kMatchMinLen = 2 |
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130 | |||
131 | .IsMatch = 0 |
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132 | .IsRep = (.IsMatch + (.kNumStates shl .kNumPosBitsMax)) |
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133 | .IsRepG0 = (.IsRep + .kNumStates) |
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134 | .IsRepG1 = (.IsRepG0 + .kNumStates) |
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135 | .IsRepG2 = (.IsRepG1 + .kNumStates) |
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136 | .IsRep0Long = (.IsRepG2 + .kNumStates) |
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137 | .PosSlot = (.IsRep0Long + (.kNumStates shl .kNumPosBitsMax)) |
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138 | .SpecPos = (.PosSlot + (.kNumLenToPosStates shl .kNumPosSlotBits)) |
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139 | .Align_ = (.SpecPos + .kNumFullDistances - .kEndPosModelIndex) |
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140 | .Lencoder = (.Align_ + .kAlignTableSize) |
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141 | .RepLencoder = (.Lencoder + .kNumLenProbs) |
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142 | .Literal = (.RepLencoder + .kNumLenProbs) |
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143 | |||
144 | .LZMA_BASE_SIZE = 1846 ; must be ==Literal |
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145 | .LZMA_LIT_SIZE = 768 |
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146 | |||
147 | .kNumTopBits = 24 |
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148 | .kTopValue = (1 shl .kNumTopBits) |
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149 | |||
150 | .kNumBitModelTotalBits = 11 |
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151 | .kBitModelTotal = (1 shl .kNumBitModelTotalBits) |
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152 | .kNumMoveBits = 5 |
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153 | |||
154 | push edi |
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155 | ; int state=0; |
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156 | xor ebx, ebx |
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157 | mov [.previousByte], bl |
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158 | ; unsigned rep0=1,rep1=1,rep2=1,rep3=1; |
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159 | mov eax, 1 |
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160 | mov edi, .rep0 |
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161 | stosd |
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162 | stosd |
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163 | stosd |
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164 | stosd |
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165 | ; int len=0; |
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166 | ; result=0; |
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167 | mov ecx, .Literal + (.LZMA_LIT_SIZE shl (.lc+.lp)) |
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168 | mov eax, .kBitModelTotal/2 |
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169 | mov edi, [.p] |
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170 | rep stosd |
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171 | ; RangeDecoderInit |
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172 | ; rd->ExtraBytes = 0 |
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173 | ; rd->Buffer = stream |
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174 | ; rd->BufferLim = stream+bufferSize |
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175 | ; rd->Range = 0xFFFFFFFF |
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176 | pop edi |
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177 | mov ebp, [esi-8] ; dest_length |
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178 | add ebp, edi ; ebp = destination limit |
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179 | lodsd |
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180 | ; rd->code_ = eax |
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181 | mov [.code_], eax |
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182 | or [.range], -1 |
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183 | .main_loop: |
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184 | cmp edi, ebp |
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185 | jae .main_loop_done |
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186 | mov edx, edi |
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187 | and edx, .posStateMask |
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188 | mov eax, ebx |
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189 | shl eax, .kNumPosBitsMax+2 |
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190 | lea eax, [.IsMatch*4 + eax + edx*4] |
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191 | add eax, [.p] |
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192 | call .RangeDecoderBitDecode |
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193 | jc .1 |
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194 | movzx eax, [.previousByte] |
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195 | if .literalPosMask |
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196 | mov ah, dl |
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197 | and ah, .literalPosMask |
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198 | end if |
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199 | shr eax, 8-.lc |
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200 | imul eax, .LZMA_LIT_SIZE*4 |
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201 | add eax, .Literal*4 |
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202 | add eax, [.p] |
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203 | cmp ebx, .kNumLitStates |
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204 | jb .literal |
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205 | xor edx, edx |
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206 | sub edx, [.rep0] |
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207 | mov dl, [edi + edx] |
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208 | call .LzmaLiteralDecodeMatch |
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209 | jmp @f |
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210 | .literal: |
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211 | call .LzmaLiteralDecode |
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212 | @@: |
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213 | mov [.previousByte], al |
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214 | stosb |
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215 | mov al, bl |
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216 | cmp bl, 4 |
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217 | jb @f |
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218 | mov al, 3 |
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219 | cmp bl, 10 |
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220 | jb @f |
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221 | mov al, 6 |
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222 | @@: |
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223 | sub bl, al |
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224 | jmp .main_loop |
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225 | .1: |
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226 | lea eax, [.IsRep*4 + ebx*4] |
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227 | add eax, [.p] |
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228 | call .RangeDecoderBitDecode |
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229 | jnc .10 |
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230 | lea eax, [.IsRepG0*4 + ebx*4] |
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231 | add eax, [.p] |
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232 | call .RangeDecoderBitDecode |
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233 | jc .111 |
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234 | mov eax, ebx |
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235 | shl eax, .kNumPosBitsMax+2 |
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236 | lea eax, [.IsRep0Long*4 + eax + edx*4] |
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237 | add eax, [.p] |
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238 | call .RangeDecoderBitDecode |
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239 | jc .1101 |
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240 | cmp bl, 7 |
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241 | setae bl |
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242 | lea ebx, [9 + ebx + ebx] |
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243 | xor edx, edx |
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244 | sub edx, [.rep0] |
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245 | mov al, [edi + edx] |
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246 | stosb |
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247 | mov [.previousByte], al |
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248 | jmp .main_loop |
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249 | .111: |
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250 | lea eax, [.IsRepG1*4 + ebx*4] |
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251 | add eax, [.p] |
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252 | call .RangeDecoderBitDecode |
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253 | mov eax, [.rep1] |
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254 | jnc .l3 |
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255 | .l1: |
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256 | lea eax, [.IsRepG2*4 + ebx*4] |
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257 | add eax, [.p] |
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258 | call .RangeDecoderBitDecode |
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259 | mov eax, [.rep2] |
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260 | jnc .l2 |
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261 | xchg [.rep3], eax |
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262 | .l2: |
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263 | push [.rep1] |
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264 | pop [.rep2] |
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265 | .l3: |
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266 | xchg eax, [.rep0] |
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267 | mov [.rep1], eax |
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268 | .1101: |
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269 | mov eax, .RepLencoder*4 |
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270 | add eax, [.p] |
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271 | call .LzmaLenDecode |
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272 | cmp bl, 7 |
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273 | setc bl |
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274 | adc bl, bl |
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275 | xor bl, 3 |
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276 | add bl, 8 |
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277 | jmp .repmovsb |
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278 | .10: |
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279 | mov eax, [.rep0] |
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280 | xchg eax, [.rep1] |
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281 | xchg eax, [.rep2] |
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282 | xchg eax, [.rep3] |
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283 | cmp bl, 7 |
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284 | setc bl |
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285 | adc bl, bl |
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286 | xor bl, 3 |
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287 | add bl, 7 |
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288 | mov eax, .Lencoder*4 |
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289 | add eax, [.p] |
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290 | call .LzmaLenDecode |
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291 | mov eax, .kNumLenToPosStates-1 |
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292 | cmp eax, ecx |
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293 | jb @f |
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294 | mov eax, ecx |
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295 | @@: |
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296 | push ecx |
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297 | mov ecx, .kNumPosSlotBits |
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298 | shl eax, cl |
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299 | shl eax, 2 |
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300 | add eax, .PosSlot*4 |
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301 | add eax, [.p] |
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302 | call .RangeDecoderBitTreeDecode |
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303 | mov [.rep0], ecx |
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304 | cmp ecx, .kStartPosModelIndex |
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305 | jb .l6 |
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306 | push ecx |
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307 | mov eax, ecx |
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308 | and eax, 1 |
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309 | shr ecx, 1 |
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310 | or eax, 2 |
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311 | dec ecx |
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312 | shl eax, cl |
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313 | mov [.rep0], eax |
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314 | pop edx |
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315 | cmp edx, .kEndPosModelIndex |
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316 | jae .l5 |
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317 | sub eax, edx |
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318 | shl eax, 2 |
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319 | add eax, (.SpecPos - 1)*4 |
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320 | add eax, [.p] |
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321 | call .RangeDecoderReverseBitTreeDecode |
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322 | add [.rep0], ecx |
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323 | jmp .l6 |
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324 | .l5: |
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325 | sub ecx, .kNumAlignBits |
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326 | call .RangeDecoderDecodeDirectBits |
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327 | mov ecx, .kNumAlignBits |
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328 | shl eax, cl |
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329 | add [.rep0], eax |
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330 | mov eax, .Align_*4 |
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331 | add eax, [.p] |
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332 | call .RangeDecoderReverseBitTreeDecode |
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333 | add [.rep0], ecx |
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334 | .l6: |
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335 | pop ecx |
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336 | inc [.rep0] |
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337 | jz .main_loop_done |
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338 | .repmovsb: |
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339 | add ecx, .kMatchMinLen |
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340 | push esi |
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341 | mov esi, edi |
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342 | sub esi, [.rep0] |
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343 | rep movsb |
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344 | pop esi |
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345 | mov al, [edi-1] |
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346 | mov [.previousByte], al |
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347 | jmp .main_loop |
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348 | .main_loop_done: |
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349 | ret |
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350 | |||
351 | .RangeDecoderBitDecode: |
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352 | ; in: eax->prob |
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353 | ; out: CF=bit; destroys eax |
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354 | push edx |
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355 | mov edx, [.range] |
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356 | shr edx, .kNumBitModelTotalBits |
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357 | imul edx, [eax] |
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358 | cmp [.code_], edx |
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359 | jae .ae |
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360 | mov [.range], edx |
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361 | mov edx, .kBitModelTotal |
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362 | sub edx, [eax] |
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363 | shr edx, .kNumMoveBits |
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364 | add [eax], edx |
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365 | clc |
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366 | .n: |
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367 | lahf |
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368 | cmp [.range], .kTopValue |
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369 | jae @f |
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370 | shl [.range], 8 |
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371 | shl [.code_], 8 |
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372 | lodsb |
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373 | mov byte [.code_], al |
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374 | @@: |
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375 | sahf |
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376 | pop edx |
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377 | ret |
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378 | .ae: |
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379 | sub [.range], edx |
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380 | sub [.code_], edx |
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381 | mov edx, [eax] |
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382 | shr edx, .kNumMoveBits |
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383 | sub [eax], edx |
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384 | stc |
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385 | jmp .n |
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386 | |||
387 | .RangeDecoderDecodeDirectBits: |
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388 | ; in: ecx=numTotalBits |
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389 | ; out: eax=result; destroys edx |
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390 | xor eax, eax |
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391 | .l: |
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392 | shr [.range], 1 |
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393 | shl eax, 1 |
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394 | mov edx, [.code_] |
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395 | sub edx, [.range] |
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396 | jb @f |
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397 | mov [.code_], edx |
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398 | or eax, 1 |
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399 | @@: |
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400 | cmp [.range], .kTopValue |
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401 | jae @f |
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402 | shl [.range], 8 |
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403 | shl [.code_], 8 |
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404 | push eax |
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405 | lodsb |
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406 | mov byte [.code_], al |
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407 | pop eax |
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408 | @@: |
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409 | loop .l |
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410 | ret |
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411 | |||
412 | .LzmaLiteralDecode: |
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413 | ; in: eax->probs |
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414 | ; out: al=byte; destroys edx |
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415 | push ecx |
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416 | mov ecx, 1 |
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417 | @@: |
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418 | push eax |
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419 | lea eax, [eax+ecx*4] |
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420 | call .RangeDecoderBitDecode |
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421 | pop eax |
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422 | adc cl, cl |
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423 | jnc @b |
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424 | .LzmaLiteralDecode.ret: |
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425 | mov al, cl |
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426 | pop ecx |
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427 | ret |
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428 | .LzmaLiteralDecodeMatch: |
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429 | ; in: eax->probs, dl=matchByte |
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430 | ; out: al=byte; destroys edx |
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431 | push ecx |
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432 | mov ecx, 1 |
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433 | .LzmaLiteralDecodeMatch.1: |
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434 | add dl, dl |
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435 | setc ch |
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436 | push eax |
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437 | lea eax, [eax+ecx*4+0x100*4] |
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438 | call .RangeDecoderBitDecode |
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439 | pop eax |
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440 | adc cl, cl |
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441 | jc .LzmaLiteralDecode.ret |
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442 | xor ch, cl |
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443 | test ch, 1 |
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444 | mov ch, 0 |
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445 | jnz @b |
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446 | jmp .LzmaLiteralDecodeMatch.1 |
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447 | |||
448 | .LzmaLenDecode: |
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449 | ; in: eax->prob, edx=posState |
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450 | ; out: ecx=len |
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451 | push eax |
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452 | add eax, .LenChoice*4 |
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453 | call .RangeDecoderBitDecode |
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454 | pop eax |
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455 | jnc .0 |
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456 | push eax |
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457 | add eax, .LenChoice2*4 |
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458 | call .RangeDecoderBitDecode |
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459 | pop eax |
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460 | jc @f |
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461 | mov ecx, .kLenNumMidBits |
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462 | shl edx, cl |
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463 | lea eax, [eax + .LenMid*4 + edx*4] |
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464 | call .RangeDecoderBitTreeDecode |
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465 | add ecx, .kLenNumLowSymbols |
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466 | ret |
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467 | @@: |
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468 | add eax, .LenHigh*4 |
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469 | mov ecx, .kLenNumHighBits |
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470 | call .RangeDecoderBitTreeDecode |
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471 | add ecx, .kLenNumLowSymbols + .kLenNumMidSymbols |
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472 | ret |
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473 | .0: |
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474 | mov ecx, .kLenNumLowBits |
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475 | shl edx, cl |
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476 | lea eax, [eax + .LenLow*4 + edx*4] |
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477 | .RangeDecoderBitTreeDecode: |
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478 | ; in: eax->probs,ecx=numLevels |
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479 | ; out: ecx=length; destroys edx |
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480 | push ebx |
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481 | mov edx, 1 |
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482 | mov ebx, edx |
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483 | @@: |
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484 | push eax |
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485 | lea eax, [eax+edx*4] |
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486 | call .RangeDecoderBitDecode |
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487 | pop eax |
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488 | adc dl, dl |
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489 | add bl, bl |
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490 | loop @b |
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491 | sub dl, bl |
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492 | pop ebx |
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493 | mov ecx, edx |
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494 | ret |
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495 | .RangeDecoderReverseBitTreeDecode: |
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496 | ; in: eax->probs,ecx=numLevels |
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497 | ; out: ecx=length; destroys edx |
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498 | push ebx ecx |
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499 | mov edx, 1 |
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500 | xor ebx, ebx |
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501 | @@: |
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502 | push eax |
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503 | lea eax, [eax+edx*4] |
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504 | call .RangeDecoderBitDecode |
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505 | lahf |
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506 | adc edx, edx |
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507 | sahf |
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508 | rcr ebx, 1 |
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509 | pop eax |
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510 | loop @b |
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511 | pop ecx |
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512 | rol ebx, cl |
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513 | mov ecx, ebx |
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514 | pop ebx |
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515 | ret |
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516 | |||
517 | uglobal |
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518 | align 4 |
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519 | ;unpack.p rd unpack.LZMA_BASE_SIZE + (unpack.LZMA_LIT_SIZE shl (unpack.lc+unpack.lp)) |
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520 | unpack.p dd ? |
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521 | unpack.code_ dd ? |
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522 | unpack.range dd ? |
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523 | unpack.rep0 dd ? |
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524 | unpack.rep1 dd ? |
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525 | unpack.rep2 dd ? |
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526 | unpack.rep3 dd ? |
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527 | unpack.previousByte db ? |
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528 | endg |