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annotate src/th06/ecl_vm.rs @ 654:ec7e888e88f3

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Up to instruction 34 validated.
author Gauvain "GovanifY" Roussel-Tarbouriech <gauvain@govanify.com>
date Thu, 08 Aug 2019 16:42:25 +0200
parents 16aa9a636d35
children 6b4d2b405442
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653
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Gauvain "GovanifY" Roussel-Tarbouriech <gauvain@govanify.com>
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1 //! ECL runner.
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2
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3 use crate::th06::anm0::{
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4 Script,
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5 Anm0,
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6 Call,
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7 Instruction,
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8 };
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9 use crate::th06::interpolator::{Interpolator1, Interpolator2, Interpolator3, Formula};
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10 use crate::util::math::Mat4;
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11 use crate::util::prng::Prng;
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12 use std::cell::RefCell;
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13 use std::rc::{Rc, Weak};
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14
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15 fn run_instruction(&mut self, instruction: Instruction) {
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16 let mut sprite = self.sprite.borrow_mut();
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17 match instruction {
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18 Instruction::Noop() {
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19 // really
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20 }
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21 // 1
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22 Instruction::Stop() {
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23 self._enemy.removed = true;
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24 }
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25 // 2
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26 Instruction::RelativeJump(frame, ip) {
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27 self.frame = frame;
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28 // ip = ip + flag in th06
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29 self.ip = ip;
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30 // we jump back to the main of the interpreter
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31 }
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32 // 3
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33 // GHIDRA SAYS THERE IS A COMPARISON_REG BUFFER BUT THERE IS NOT!!!
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34 //
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35 // MOV ECX,dword ptr [EBP + 0x8] jumptable 00407544 case 31
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36 // CMP dword ptr [0x9d4 + ECX],0x0
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37 // JLE LAB_00407abb
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38 // aka ECX = enemy pointer
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39 // ECX->9d4 (aka enemy_pointer_copy->comparison_reg) == 0
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40 // only the pointer is copied, not the value, thus we are safe
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41 Instruction::RelativeJumpEx(frame, ip, var_id) {
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42 // TODO: counter_value is a field of "enemy" in th06, to check
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43 counter_value = self._getval(var_id) - 1
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44 if counter_value > 0 {
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45 Instruction::RelativeJump(frame, ip);
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46 }
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47 }
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48
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49 //4, 5
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50 Instruction::SetVariable(var_id, value) {
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51 self._setval(var_id, value);
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52 }
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53 // 6
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54 Instruction::SetRandomInt(var_id, maxval) {
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55 self._setval(var_id, self._game.prng.rand_32()%self._getval(maxval));
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56 }
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57 // 7
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58 Instruction::SetRandomIntMin(var_id, maxval, minval) {
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59 self._setval(var_id, (self._game.prng.rand_32()%self._getval(maxval))+self._getval(minval));
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60 }
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61 // 8
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62 Instruction::SetRandomFloat(var_id, maxval) {
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63 self._setval(var_id, self._getval(maxval) * self._game.prng.rand_double())
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64 }
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65 // 9
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66 Instruction::SetRandomFloatMin(var_id, maxval, minval) {
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67 self._setval(var_id, (self._getval(maxval) * self._game.prng.rand_double())+self._getval(minval))
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68 }
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69 // 10
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70 Instruction::StoreX(var_id) {
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71 self._setval(var_id, self._enemy.x);
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72 }
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73 // 11
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74 Instruction::StoreY(var_id) {
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75 self._setval(var_id, self._enemy.y);
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76 }
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77 // 12
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78 Instruction::StoreZ(var_id) {
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79 self._setval(var_id, self._enemy.z);
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80 }
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81 // 13(int), 20(float), same impl in th06
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82 Instruction::Add(var_id, a, b) {
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83 self._setval(var_id, self._getval(a) + self._getval(b));
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84 }
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85 // 14(int), 21(float), same impl in th06
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86 Instruction::Substract(var_id, a, b) {
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87 self._setval(var_id, self._getval(a) - self._getval(b));
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88 }
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89 // 15(int), 22(unused)
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90 Instruction::Multiply(var_id, a, b) {
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91 self._setval(var_id, self._getval(a) * self._getval(b));
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92 }
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93 // 16(int), 23(unused)
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94 Instruction::Divide(var_id, a, b) {
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95 self._setval(var_id, self._getval(a) / self._getval(b));
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96 }
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97 // 17(int) 24(unused)
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98 Instruction::Divide(var_id, a, b) {
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99 self._setval(var_id, self._getval(a) % self._getval(b));
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100 }
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101 // 18
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102 // setval used by pytouhou, but not in game(???)
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103 Instruction::Increment(var_id) {
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104 var_id = self._getval(var_id) + 1
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105 }
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106 // 19
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107 Instruction::Decrement(var_id) {
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108 var_id = self._getval(var_id) - 1
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109 }
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110 //25
654
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111 Instruction::GetDirection(var_id, x1, y1, x2, y2) {
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112 //__ctrandisp2 in ghidra, let's assume from pytouhou it's atan2
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113 self._setval(var_id, atan2(self._getval(y2) - self._getval(y1), self._getval(x2) - self._getval(x1)));
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114 }
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115
654
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116 // 26
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117 Instruction::FloatToUnitCircle(var_id) {
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118 // TODO: atan2(var_id, ??) is used by th06, maybe ?? is pi?
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119 // we suck at trigonometry so let's use pytouhou for now
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120 self._setval(var_id, (self._getval(var_id) + pi) % (2*pi) - pi);
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121 }
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122
654
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123 // 27(int), 28(float)
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124 Instruction::Compare(a, b) {
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125 a = self._getval(a);
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126 b = self._getval(b);
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127 if a < b {
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128 self.comparison_reg = -1
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129 }
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130 else if a == b {
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131 self.comparison_reg = 0
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132 }
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133 else {
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134 self.comparison_reg = 1
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135 }
ec7e888e88f3 Up to instruction 34 validated.
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136 }
ec7e888e88f3 Up to instruction 34 validated.
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137 // 29
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138 Instruction::RelativeJumpIfLowerThan(frame, ip) {
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139 if self.comparison_reg == -1 {
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140 Instruction::RelativeJump();
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141 }
ec7e888e88f3 Up to instruction 34 validated.
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142 }
ec7e888e88f3 Up to instruction 34 validated.
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143 // 30
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144 Instruction::RelativeJumpIfLowerOrEqual(frame, ip) {
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145 if self.comparison_reg != 1 {
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146 Instruction::RelativeJump();
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147 }
ec7e888e88f3 Up to instruction 34 validated.
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148 }
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149 // 31
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150 Instruction::RelativeJumpIfEqual(frame, ip) {
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151 if self.comparison_reg == 0 {
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152 Instruction::RelativeJump();
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153 }
ec7e888e88f3 Up to instruction 34 validated.
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154 }
ec7e888e88f3 Up to instruction 34 validated.
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parents: 653
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155 // 32
653
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156 Instruction::RelativeJumpIfGreaterThan(frame, ip) {
654
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157 if self.comparison_reg == 1 {
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158 Instruction::RelativeJump();
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159 }
ec7e888e88f3 Up to instruction 34 validated.
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160 }
ec7e888e88f3 Up to instruction 34 validated.
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parents: 653
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161 // 33
ec7e888e88f3 Up to instruction 34 validated.
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parents: 653
diff changeset
162 Instruction::RelativeJumpIfGreaterOrEqual(frame, ip) {
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163 if self.comparison_reg != -1
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164 Instruction::RelativeJump();
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165 }
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parents:
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166 // 34
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parents:
diff changeset
167 Instruction::RelativeJumpIfNotEqual(frame, ip) {
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168 if self.comparison_reg != 0
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169 Instruction::RelativeJump();
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170 }
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171
16aa9a636d35 Some starting point for ecl_vm.
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parents:
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172
16aa9a636d35 Some starting point for ecl_vm.
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parents:
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173
16aa9a636d35 Some starting point for ecl_vm.
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parents:
diff changeset
174
16aa9a636d35 Some starting point for ecl_vm.
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parents:
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175
16aa9a636d35 Some starting point for ecl_vm.
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parents:
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176