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1 #include <functional>
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2 #include <iostream>
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3 #include <iomanip>
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4 #include "node.h"
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5 #include "compiler.h"
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6 #include "script-parser.hh"
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7
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8 // コード生成用
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9 CNodeValue CNodeValue::MakeNodeValue(compiler *c, CNode *node)
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10 {
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11 switch (node->op()) {
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12 case OP_CONST:
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13 return CNodeValue(CONST, node->value());
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14
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15 case OP_VALUE:
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16 {
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17 const CValueTag *tag = c->GetValueTag(node->string());
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18 if (tag == 0) {
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19 c->error(node->location(), "変数" + node->string() + "は未定義です。");
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20 return CNodeValue(VALUE, 0);
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21 }
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22 return CNodeValue(VALUE, tag->addr_);
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23 }
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24 }
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25 return node->analyze(c);
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26 }
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27
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28 // 一時変数の管理
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29 CNodeValue CNodeValue::MakeTempValue(compiler *c, int value)
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30 {
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31 if (value < 0)
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32 return CNodeValue(c, TEMP, c->AllocTempValue());
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33 return CNodeValue(VALUE, value);
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34 }
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35
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36 void CNodeValue::ReleaseTempValue()
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37 {
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38 c_->ReleaseTempValue(value_);
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39 }
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40
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41 void CNodeValue::UseTempValue()
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42 {
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43 c_->UseTempValue(value_);
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44 }
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45
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46 int CNodeValue::value() const
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47 {
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48 if (type_ == TEMP)
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49 return c_->GetTempAddr(value_);
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50 return value_;
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51 }
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52
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53 // ノード生成
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54 // ただし、定数同士の計算は、leftノードに結果を代入し、それを返す
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55
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56 CNode *CNode::MakeNode(compiler &c, const yy::location& l, int op, CNode *left, CNode *right)
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57 {
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58 if (right == 0) {
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59 switch (op) {
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60 case OP_NEG:
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61 if (left->op_ == OP_CONST) { // 定数演算を計算する
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62 left->value_ = -left->value_;
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63 return left;
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64 }
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65 break;
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66 }
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67 return new CNode(l, op, left);
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68 }
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69
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70 // 定数演算を計算する
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71 if (left->op_ == OP_CONST && right->op_ == OP_CONST) {
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72 switch (op) {
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73 case OP_EQ:
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74 left->value_ = (left->value_ == right->value_)? 1: 0;
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75 break;
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76
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77 case OP_NE:
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78 left->value_ = (left->value_ != right->value_)? 1: 0;
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79 break;
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80
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81 case OP_GT:
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82 left->value_ = (left->value_ > right->value_)? 1: 0;
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83 break;
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84
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85 case OP_GE:
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86 left->value_ = (left->value_ >= right->value_)? 1: 0;
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87 break;
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88
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89 case OP_LT:
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90 left->value_ = (left->value_ < right->value_)? 1: 0;
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91 break;
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92
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93 case OP_LE:
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94 left->value_ = (left->value_ <= right->value_)? 1: 0;
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95 break;
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96
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97 case OP_MINUS:
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98 left->value_ -= right->value_;
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99 break;
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100
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101 case OP_PLUS:
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102 left->value_ += right->value_;
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103 break;
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104
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105 case OP_TIMES:
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106 left->value_ *= right->value_;
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107 break;
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108
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109 case OP_DIVIDE:
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110 if (right->value_ == 0) {
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111 c.error(l, "定数計算を0で除算しました。");
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112 }
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113 else {
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114 left->value_ /= right->value_;
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115 }
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116 break;
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117
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118 case OP_MOD:
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119 if (right->value_ == 0) {
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120 c.error(l, "定数計算を0で除算しました。");
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121 }
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122 else {
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123 left->value_ %= right->value_;
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124 }
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125 break;
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126
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127 default:
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128 return new CNode(l, op, left, right);
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129 }
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130 delete right;
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131 return left;
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132 }
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133 return new CNode(l, op, left, right);
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134 }
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135
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136 CNodeValue CNode::analyze(compiler *c, int ret)
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137 {
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138 switch (op_) {
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139 case OP_NEG:
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140 return c->MakeNeg(ret, CNodeValue::MakeNodeValue(c, left_));
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141
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142 case OP_RANDFUNC:
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143 return c->MakeRand(ret, CNodeValue::MakeNodeValue(c, left_));
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144
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145 case OP_CONST:
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146 return c->MakeMoveC(ret, value_);
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147
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148 case OP_VALUE:
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149 return c->MakeMoveV(ret, CNodeValue::MakeNodeValue(c, this));
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150 }
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151
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152 CNodeValue left = CNodeValue::MakeNodeValue(c, left_);
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153 CNodeValue right = CNodeValue::MakeNodeValue(c, right_);
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154
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155 // 整数計算ノードの処理
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156 return c->MakeOp(op_, ret, left, right);
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157 }
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158
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159 // 代入命令を生成
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160 //
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161 // a = b
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162 // > mov a, b
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163 //
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164 CNodeValue CAssign::analyze(compiler *c)
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165 {
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166 const CValueTag *tag = c->GetValueTag(value_->string());
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167 if (tag == 0) {
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168 tag = c->AddValue(value_->string());
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169 }
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170 if (tag == 0) {
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171 c->error(l_, "変数 " + value_->string() + " が定義できません。");
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172 return CNodeValue();
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173 }
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174 return expr_->analyze(c, tag->addr_);
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175 }
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