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0
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1 /* Micro-C Code Generatation Part for intel386 */
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2
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3 #define EXTERN extern
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4 #include "mc.h"
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5
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6 #define REGISTERS6 0
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7
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8 void code_init();
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9 void free_register();
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10 void emit_init();
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11 void emit_push();
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12 void gexpr();
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13 void g_expr();
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14 void bexpr();
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15 void b_expr();
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16 void string();
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17 void function();
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18 void machinop();
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19 void rindirect();
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20 void assign();
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21 void sassign();
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22 void assop();
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23 void tosop();
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24 char *div_setup() ;
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25 void shift() ;
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26 void ld_indexx();
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27 void st_indexx();
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28 void indexy();
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29 void cmpdimm();
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30 void global_table() ;
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31 void local_table() ;
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32 void opening();
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33 void closing();
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34 void gen_gdecl() ;
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35 void jmp_label();
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36 void jmp_eq_label();
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37 void rexpr();
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38 void jcond();
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39 void jmp();
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40 void def_label() ;
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41 void gen_comment();
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42 void gen_source();
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43 void code_enter() ;
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44 void code_leave() ;
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45 void enter() ;
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46 void enter1() ;
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47 void ret();
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48 void emit_data();
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49 void text_mode();
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50 void data_mode();
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51 int get_register_var();
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52 void jump();
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53 int lvar();
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54
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55 int cadr();
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56 int car();
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57 int caddr();
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58 int fwdlabel();
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59 void fwddef();
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60 int cadddr();
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61 int backdef();
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62 int error();
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63 int size();
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64 int list3();
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65
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66 #define TEXT_EMIT_MODE 0
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67 #define DATA_EMIT_MODE 1
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68 #define RODATA_EMIT_MODE 2
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69
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70 static output_mode = TEXT_EMIT_MODE;
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71 static data_alignment = 0;
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72
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73 /*
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74 local1 <----24 local variable
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75 %esi -20 <- disp_offset
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76 %edi -16
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77 %edx -12
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78 %ecx -8
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79 %ebx -4
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80 %ebp = %esp 0
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81 %eip 4 <- arg_offset
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82 arg1 8
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83 see enter/enter1/leave
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84 */
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85 int arg_offset = 8;
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86 int disp_offset = -20;
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87 int func_disp_offset = -20;
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88 int code_disp_offset = 0;
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89 int int_size = 4;
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90 int endian = 0;
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91 int MAX_REGISTER=6; /* intel386のレジスタを4つまで使う*/
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92 int REAL_MAX_REGISTER=8; /* intel386のレジスタが8つということ*/
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93 int MAX_DATA_REG=4;
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94 int MAX_POINTER=3;
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95 int MAX_REGISTGER_VAR=2;
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96
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97 static int creg; /* current register */
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98 static char *crn; /* current register name */
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99 static int lreg; /* operand register */
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100 static char *lrn; /* operand register name */
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101 static int dreg; /* temporary register */
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102 static char *drn; /* temporary register name */
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103 static int xreg; /* pointer register */
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104 static int reg_sp; /* REGister Stack-Pointer */
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105
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106
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107 #define REG_EAX 0
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108 #define REG_EBX 1
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109 #define REG_ECX 2
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110 #define REG_EDX 3
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111 #define REG_ESI 4
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112 #define REG_EDI 5
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113 #define REG_EBP 6
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114 #define REG_ESP 7
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115
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116
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117 #define DATA_REG 0
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118 #define POINTER_REG 3
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119 static char *reg_name[8];
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120 static char *reg_name_l[4];
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121
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122 /*
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123 creg currrent virtual register
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124 lreg operand virtual register
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125 dreg spare virtual register
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126
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127 rname[creg] currrent real register
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128 rname[lreg] operand real register
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129 rname[dreg] spare real register
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130
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131 regs[] virtual register usage
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132
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133 reg_name[rname[creg]]
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134 */
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135
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136 #define MAX_MAX 10
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137 static int rname[MAX_MAX];
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138 static int regs[MAX_MAX]; /* 使われているレジスタを示すフラグ */
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139 static int reg_stack[MAX_MAX]; /* 実際のレジスタの領域 */
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140
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141 void
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142 code_init()
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143 {
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144 if (REGISTERS6) {
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145 arg_offset = 8;
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146 func_disp_offset = -20;
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147 int_size = 4;
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148 endian = 0;
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149 MAX_REGISTER=6;
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150 MAX_DATA_REG=4;
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151 MAX_POINTER=3;
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152 } else {
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153 arg_offset = 8;
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154 func_disp_offset = -12;
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155 int_size = 4;
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156 endian = 0;
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157 MAX_REGISTER=4;
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158 MAX_DATA_REG=4;
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159 MAX_POINTER=1;
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160 }
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161 MAX_REGISTER_VAR=2;
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162
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163 reg_name[REG_EAX] = "%eax";
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164 reg_name[REG_EBX] = "%ebx";
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165 reg_name[REG_ECX] = "%ecx";
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166 reg_name[REG_EDX] = "%edx";
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167 reg_name[REG_ESI] = "%esi";
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168 reg_name[REG_EDI] = "%edi";
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169 reg_name[REG_EBP] = "%ebp";
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170 reg_name[REG_ESP] = "%esp";
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171 reg_name_l[REG_EAX] = "%al";
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172 reg_name_l[REG_EBX] = "%bl";
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173 reg_name_l[REG_ECX] = "%cl";
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174 reg_name_l[REG_EDX] = "%dl";
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175
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176 }
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177
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178 char *
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179 register_name(i)
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180 int i;
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181 {
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182 return reg_name[rname[i]];
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183 }
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184
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185 int
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186 get_register()
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187 { /* 使われていないレジスタを調べる */
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188 int i;
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189 for(i=0;i<MAX_REGISTER;i++) {
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190 if (! regs[i]) { /* 使われていないなら */
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191 regs[i]=1; /* そのレジスタを使うことを宣言し */
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192 return i; /* その場所を表す番号を返す */
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193 }
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194 }
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195 return -1; /* 空いている場所がないなら、それを表す -1 を返す */
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196 }
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197
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198 void
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199 free_register(i)
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200 int i;
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201 { /* いらなくなったレジスタを開放 */
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202 regs[i]=0;
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203 }
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204
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205 int
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206 register_full()
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207 {
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208 int i;
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209 for(i=0;i<MAX_REGISTER;i++) {
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210 if (! regs[i]) {
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211 return 0;
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212 }
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213 }
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214 return 1;
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215 }
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216
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217 void
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218 gexpr_init()
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219 {
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220 int i;
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221 while(reg_sp > 0) {
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222 free_register(reg_stack[--reg_sp]);
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223 }
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224 text_mode();
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225 }
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226
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227 void
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228 emit_init()
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229 {
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230 int i;
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231 for(i=0;i<REAL_MAX_REGISTER;i++) regs[i]=0;
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232 for(i=0;i<REAL_MAX_REGISTER;i++) rname[i]=i;
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233 creg = get_register();
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234 crn = reg_name[rname[creg]];
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235 dreg = get_register();
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236 drn = reg_name[rname[dreg]];
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237 reg_sp = 0;
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238 text_mode();
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239 }
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240
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241 void
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242 set_crn(i)
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243 int i;
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244 {
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245 creg = i;
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246 crn = reg_name[rname[creg]];
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247 }
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248
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249 void
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250 set_drn(i)
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251 int i;
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252 {
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253 dreg = i;
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254 drn = reg_name[rname[dreg]];
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255 }
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256
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257 int
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258 virtual(real)
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259 int real;
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260 {
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261 int real_v,i;
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262 real_v = -1;
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263 for(i=0;i<MAX_REGISTER;i++) {
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264 if (rname[i]==real) {
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265 real_v=i;
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266 break;
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267 }
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268 }
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269 if (real_v == -1)
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270 error(-1);
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271 return real_v;
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272 }
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273
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274 void
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275 use_register(virt, real, move)
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276 int virt;
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277 int real;
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278 int move;
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279 {
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280 int real_v;
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281 char *move_op;
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282 if (rname[virt]==real)
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283 return;
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284 real_v = virtual(real);
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285 move_op = regs[real_v]?"\txchg %s,%s\n":"\tmovl %s,%s\n";
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286 if (move || regs[real_v]) {
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287 printf(move_op,reg_name[rname[virt]],reg_name[real]);
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288 }
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289 rname[real_v] = rname[virt];
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290 rname[virt] = real;
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291 crn = reg_name[rname[creg]];
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292 drn = reg_name[rname[dreg]];
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293 lrn = reg_name[rname[lreg]];
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294 }
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295
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296 void
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297 use_pointer(virt, move)
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298 int virt;
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299 int move;
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300 {
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301 int i;
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302 if (rname[virt]>=POINTER_REG)
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303 return;
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304 for(i=POINTER_REG;i<MAX_REGISTER;i++) {
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305 if (!regs[virtual(i)]) {
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306 use_register(virt,i,move);
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307 return;
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308 }
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309 }
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310 /* we prefer EBX */
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311 use_register(virt,REG_EBX,move);
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312 }
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313
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314 void
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315 use_data_reg(virt, move)
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316 int virt;
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317 int move;
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318 {
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319 int i;
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320 if (rname[virt]<MAX_DATA_REG)
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321 return;
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322 for(i=0;i<MAX_DATA_REG;i++) {
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323 if (!regs[virtual(i)]) {
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324 use_register(virt,i,move);
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325 return;
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326 }
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327 }
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328 /* we prefer EBX */
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329 use_register(virt,REG_EBX,move);
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330 }
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331
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332 int
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333 pop_register()
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334 { /* レジスタから値を取り出す */
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335 int i,j;
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336
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337 j = creg;
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338 i = reg_stack[--reg_sp];
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339
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340 if(i<0) {
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341 return i;
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342 } else {
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343 free_register(i);
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344 lreg = i;
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345 lrn = reg_name[rname[lreg]];
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346 regs[i]=0;
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347 return lreg;
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348 }
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349 }
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350
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351 int
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352 stack_used()
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353 {
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354 return reg_stack[--reg_sp]<0;
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355 }
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356
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357 void
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358 emit_push()
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359 {
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360 int new_reg;
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361 new_reg = get_register();
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362 if(new_reg<0) { /* もうレジスタがない */
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363 reg_stack[reg_sp++] = -1;
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364 printf("\tpushl %s\n",crn);
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365 } else {
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366 reg_stack[reg_sp++] = creg; /* push するかわりにレジスタを使う */
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367 set_crn(new_reg);
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368 }
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369 }
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370
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371 char *
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372 emit_pop(type)
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373 int type;
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374 {
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375 char *xrn;
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376 if (pop_register()==-1) {
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377 if (type==POINTER_REG)
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378 use_pointer(dreg,0);
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379 else if (type==DATA_REG)
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380 use_data_reg(dreg,0);
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381 printf("\tpopl %s\n",drn);
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382 xrn = drn;
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383 xreg = dreg;
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384 } else {
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385 xrn = lrn;
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386 xreg = lreg;
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387 }
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388 return xrn;
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389 }
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390
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391 int
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392 get_register_var()
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393 {
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394 int i;
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395 for(i=REG_ESI;i<REG_ESP;i++) {
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396 if (! regs[i]) { /* 使われていないなら */
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397 regs[i]=1; /* そのレジスタを使うことを宣言し */
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398 return i; /* その場所を表す番号を返す */
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399 }
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400 }
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401 return -1;
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402 }
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403
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404 void
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405 gexpr(e1)
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406 int e1;
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407 {
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408 gexpr_init();
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409 g_expr(e1);
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410 csvalue = rname[creg]; /* for siwtch value */
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411 }
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412
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413 void
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414 g_expr(e1)
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415 int e1;
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416 {
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417 int e2,e3,e4;
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418 char *xrn;
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419 NMTBL *n;
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420
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421 if (chk) return;
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422 e2 = cadr(e1);
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423 switch (car(e1)){
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424 case GVAR:
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425 /* use_pointer(creg,0); */
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426 printf("\tmovl $%s,%s\n",caddr(e1),crn);
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427 return;
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428 case RGVAR:
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429 /* use_pointer(creg,0); */
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430 printf("\tmovl %s,%s\n",caddr(e1),crn);
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431 return;
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432 case CRGVAR:
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433 printf("\tmovsbl %s,%s\n",caddr(e1),crn);
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434 return;
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435 case LVAR:
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436 /* use_pointer(creg,0); */
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437 printf("\tlea %d(%%ebp),%s\n",lvar(e2),crn);
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438 return;
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439 case REGISTER:
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440 /* this is of course redundant... */
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441 printf("\tmovl %s,%s\n",register_name(e2),crn);
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442 return;
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443 case RLVAR:
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444 printf("\tmovl %d(%%ebp),%s\n",lvar(e2),crn);
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445 return;
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446 case CRLVAR:
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447 printf("\tmovsbl %d(%%ebp),%s\n",lvar(e2),crn);
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448 return;
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449 case FNAME:
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|
450 printf("\tmovl $%s,%s\n",((NMTBL *)e2)->nm,crn);
|
|
|
451 return;
|
|
|
452 case CONST: /* 代入する値が0でも特別な処理はしない */
|
|
|
453 printf("\tmovl $%d,%s\n",e2,crn);
|
|
|
454 return;
|
|
|
455 case STRING:
|
|
|
456 string(e1);
|
|
|
457 return;
|
|
|
458 case FUNCTION:
|
|
|
459 function(e1);
|
|
|
460 return;
|
|
|
461 case CODE:
|
|
|
462 jump(e2,caddr(e1));
|
|
|
463 return;
|
|
|
464 case INDIRECT:
|
|
|
465 g_expr(e2);
|
|
|
466 return;
|
|
|
467 case RINDIRECT: case CRINDIRECT:
|
|
|
468 rindirect(e1);
|
|
|
469 return;
|
|
|
470 case ADDRESS:
|
|
|
471 g_expr(e2);
|
|
|
472 return;
|
|
|
473 case MINUS: /* レジスタに対し、neglを実行すれば実現可能 */
|
|
|
474 g_expr(e2);
|
|
|
475 /* use_data_reg(creg,1); */
|
|
|
476 printf("\tnegl %s\n", crn);
|
|
|
477 return;
|
|
|
478 case BNOT: /* ~ */
|
|
|
479 g_expr(e2);
|
|
|
480 /* use_data_reg(creg,1); */
|
|
|
481 printf("\tnotl %s\n", crn);
|
|
|
482 return;
|
|
|
483 case LNOT: /* ! */
|
|
|
484 g_expr(e2);
|
|
|
485 use_data_reg(creg,1);
|
|
|
486 printf("\tcmpl $0,%s\n", crn);
|
|
|
487 printf("\tsete %s\n", reg_name_l[rname[creg]]);
|
|
|
488 printf("\tmovzbl %s,%s\n", reg_name_l[rname[creg]],crn);
|
|
|
489 return;
|
|
|
490 case PREINC:
|
|
|
491 if (car(e2)==REGISTER) {
|
|
|
492 printf("\taddl $%d,%s\n",caddr(e1),register_name(cadr(e2)));
|
|
|
493 printf("\tmovl %s,%s\n",register_name(cadr(e2)),crn);
|
|
|
494 return;
|
|
|
495 }
|
|
|
496 g_expr(e2);
|
|
|
497 printf("\taddl $%d,(%s)\n",caddr(e1),crn);
|
|
|
498 printf("\tmovl (%s),%s\n",crn,crn);
|
|
|
499 return;
|
|
|
500 case POSTINC:
|
|
|
501 if (car(e2)==REGISTER) {
|
|
|
502 printf("\tmovl %s,%s\n",register_name(cadr(e2)),crn);
|
|
|
503 printf("\taddl $%d,%s\n",caddr(e1),register_name(cadr(e2)));
|
|
|
504 return;
|
|
|
505 }
|
|
|
506 g_expr(e2);
|
|
|
507 emit_push();
|
|
|
508 /* in case of register full we should copy crn to drn */
|
|
|
509 xrn = emit_pop(0);
|
|
|
510 printf("\tmovl (%s),%s\n",xrn,crn);
|
|
|
511 printf("\taddl $%d,(%s)\n",caddr(e1),xrn);
|
|
|
512 return;
|
|
|
513 case CPOSTINC:
|
|
|
514 /* char *p; *p++ */
|
|
|
515 if (car(e2)==REGISTER) {
|
|
|
516 printf("\tmovl %s,%s\n",register_name(cadr(e2)),crn);
|
|
|
517 printf("\taddl $%d,%s\n",caddr(e1),register_name(cadr(e2)));
|
|
|
518 return;
|
|
|
519 }
|
|
|
520 g_expr(e2);
|
|
|
521 emit_push(); /* in case of register full we should copy crn to drn */
|
|
|
522 xrn = emit_pop(0);
|
|
|
523 printf("\tmovsbl (%s),%s\n",xrn,crn);
|
|
|
524 printf("\tincl (%s)\n",xrn);
|
|
|
525 return;
|
|
|
526 case CPREINC:
|
|
|
527 if (car(e2)==REGISTER) {
|
|
|
528 printf("\taddl $%d,%s\n",caddr(e1),register_name(cadr(e2)));
|
|
|
529 printf("\tmovl %s,%s\n",register_name(cadr(e2)),crn);
|
|
|
530 return;
|
|
|
531 }
|
|
|
532 g_expr(e2);
|
|
|
533 printf("\tincl (%s)\n",crn);
|
|
|
534 printf("\tmovsbl (%s),%s\n",crn,crn);
|
|
|
535 return;
|
|
|
536 case CPOSTDEC:
|
|
|
537 if (car(e2)==REGISTER) {
|
|
|
538 printf("\tmovl %s,%s\n",register_name(cadr(e2)),crn);
|
|
|
539 printf("\tdecl %s\n",register_name(cadr(e2)));
|
|
|
540 return;
|
|
|
541 }
|
|
|
542 g_expr(e2);
|
|
|
543 printf("\tmovsbl (%s),%s\n",crn,crn);
|
|
|
544 printf("\tdecl (%s)\n",crn);
|
|
|
545 return;
|
|
|
546 case CPREDEC:
|
|
|
547 if (car(e2)==REGISTER) {
|
|
|
548 printf("\tdecl %s\n",register_name(cadr(e2)));
|
|
|
549 printf("\tmovl %s,%s\n",register_name(cadr(e2)),crn);
|
|
|
550 return;
|
|
|
551 }
|
|
|
552 g_expr(e2);
|
|
|
553 emit_push();
|
|
|
554 xrn = emit_pop(0);
|
|
|
555 printf("\tdecl (%s)\n",xrn);
|
|
|
556 printf("\tmovsbl (%s),%s\n",xrn,crn);
|
|
|
557 return;
|
|
|
558 case MUL: case UMUL:
|
|
|
559 case DIV: case UDIV:
|
|
|
560 case MOD: case UMOD:
|
|
|
561 case LSHIFT: case ULSHIFT: case RSHIFT: case URSHIFT:
|
|
|
562 case ADD: case SUB: case BAND: case EOR: case BOR:
|
|
|
563 machinop(e1);
|
|
|
564 return;
|
|
|
565 case COND:
|
|
|
566 e2=fwdlabel();
|
|
|
567 b_expr(cadr(e1),0,e2);
|
|
|
568 g_expr(caddr(e1));
|
|
|
569 e4 = rname[creg];
|
|
|
570 jmp(e3=fwdlabel());
|
|
|
571 fwddef(e2);
|
|
|
572 g_expr(cadddr(e1));
|
|
|
573 use_register(creg,e4,1);
|
|
|
574 fwddef(e3);
|
|
|
575 return;
|
|
|
576 case SASS:
|
|
|
577 sassign(e1);
|
|
|
578 return;
|
|
|
579 case ASS: case CASS:
|
|
|
580 assign(e1);
|
|
|
581 return;
|
|
|
582 case ASSOP: case CASSOP:
|
|
|
583 assop(e1);
|
|
|
584 return;
|
|
|
585 case COMMA:
|
|
|
586 g_expr(e2);
|
|
|
587 g_expr(caddr(e1));
|
|
|
588 return;
|
|
|
589 case RETURN:
|
|
|
590 n = (NMTBL *)e2;
|
|
|
591 if (retcont==0)
|
|
|
592 retcont=fwdlabel();
|
|
|
593 printf("\tleal _%d,%s\n",retcont,crn);
|
|
|
594 return;
|
|
|
595 case ENVIRONMENT:
|
|
|
596 printf("\tmovl %%ebp,%s\n",crn);
|
|
|
597 return;
|
|
|
598 default:
|
|
|
599 b_expr(e1,1,e2=fwdlabel()); /* including > < ... */
|
|
|
600 printf("\txorl %s,%s\n",crn,crn);
|
|
|
601 jmp(e3=fwdlabel());
|
|
|
602 fwddef(e2);
|
|
|
603 printf("\tmovl $1,%s\n",crn);
|
|
|
604 fwddef(e3);
|
|
|
605 }
|
|
|
606 }
|
|
|
607
|
|
|
608 void
|
|
|
609 bexpr(e1, cond, l1)
|
|
|
610 int e1;
|
|
|
611 char cond;
|
|
|
612 int l1;
|
|
|
613 {
|
|
|
614 gexpr_init();
|
|
|
615 b_expr(e1,cond,l1);
|
|
|
616 }
|
|
|
617
|
|
|
618 void
|
|
|
619 b_expr(e1, cond, l1)
|
|
|
620 int e1;
|
|
|
621 char cond;
|
|
|
622 int l1;
|
|
|
623 {
|
|
|
624 int e2,l2;
|
|
|
625 if (chk) return;
|
|
|
626 e2=cadr(e1);
|
|
|
627 switch(car(e1)) {
|
|
|
628 case LNOT:
|
|
|
629 b_expr(e2,!cond,l1);
|
|
|
630 return;
|
|
|
631 case GT:
|
|
|
632 rexpr(e1,l1,cond?"g":"le");
|
|
|
633 return;
|
|
|
634 case UGT:
|
|
|
635 rexpr(e1,l1,cond?"a":"be");
|
|
|
636 return;
|
|
|
637 case GE:
|
|
|
638 rexpr(e1,l1,cond?"ge":"l");
|
|
|
639 return;
|
|
|
640 case UGE:
|
|
|
641 rexpr(e1,l1,cond?"ae":"b");
|
|
|
642 return;
|
|
|
643 case LT:
|
|
|
644 rexpr(e1,l1,cond?"l":"ge");
|
|
|
645 return;
|
|
|
646 case ULT:
|
|
|
647 rexpr(e1,l1,cond?"b":"ae");
|
|
|
648 return;
|
|
|
649 case LE:
|
|
|
650 rexpr(e1,l1,cond?"le":"g");
|
|
|
651 return;
|
|
|
652 case ULE:
|
|
|
653 rexpr(e1,l1,cond?"be":"a");
|
|
|
654 return;
|
|
|
655 case EQ:
|
|
|
656 rexpr(e1,l1,cond?"e":"ne");
|
|
|
657 return;
|
|
|
658 case NEQ:
|
|
|
659 rexpr(e1,l1,cond?"ne":"e");
|
|
|
660 return;
|
|
|
661 case LAND:
|
|
|
662 b_expr(e2,0,cond?(l2=fwdlabel()):l1);
|
|
|
663 b_expr(caddr(e1),cond,l1);
|
|
|
664 if(cond) fwddef(l2);
|
|
|
665 return;
|
|
|
666 case LOR:
|
|
|
667 b_expr(e2,1,cond?l1:(l2=fwdlabel()));
|
|
|
668 b_expr(caddr(e1),cond,l1);
|
|
|
669 if(!cond) fwddef(l2);
|
|
|
670 return;
|
|
|
671 case CRGVAR:
|
|
|
672 printf("\tcmpb $0,%s\n",caddr(e1));
|
|
|
673 jcond(l1,cond);
|
|
|
674 return;
|
|
|
675 case CRLVAR:
|
|
|
676 printf("\tcmpb $0,%d(%%ebp)\n",lvar(e2));
|
|
|
677 jcond(l1,cond);
|
|
|
678 return;
|
|
|
679 case RGVAR:
|
|
|
680 printf("\tcmpl $0,%s\n",caddr(e1));
|
|
|
681 jcond(l1,cond);
|
|
|
682 return;
|
|
|
683 case RLVAR:
|
|
|
684 printf("\tcmpl $0,%d(%%ebp)\n",lvar(e2));
|
|
|
685 jcond(l1,cond);
|
|
|
686 return;
|
|
|
687 case REGISTER:
|
|
|
688 printf("\tcmpl $0,%s\n",register_name(e2));
|
|
|
689 jcond(l1,cond);
|
|
|
690 return;
|
|
|
691 case CONST:
|
|
|
692 if((cond&&e2)||(!cond&&!e2)) jmp(l1);
|
|
|
693 return;
|
|
|
694 default:
|
|
|
695 g_expr(e1);
|
|
|
696 printf("\tcmpl $0,%s\n",crn);
|
|
|
697 jcond(l1,cond);
|
|
|
698 return;
|
|
|
699 }
|
|
|
700 }
|
|
|
701
|
|
|
702 void
|
|
|
703 ascii(s)
|
|
|
704 char *s;
|
|
|
705 {
|
|
|
706 printf("\t.string \"");
|
|
|
707 while(*s) {
|
|
|
708 if (*s=='\n')
|
|
|
709 printf("%cn",92);
|
|
|
710 else if (*s<' ')
|
|
|
711 printf("%c%03o",92,*s);
|
|
|
712 else if (*s==34)
|
|
|
713 printf("%c%c",92,34);
|
|
|
714 else
|
|
|
715 printf("%c",*s);
|
|
|
716 s++;
|
|
|
717 }
|
|
|
718 printf("%c\n",34);
|
|
|
719 }
|
|
|
720
|
|
|
721 void
|
|
|
722 string(e1)
|
|
|
723 int e1;
|
|
|
724 {
|
|
|
725 char *s;
|
|
|
726 int i,lb;
|
|
|
727
|
|
|
728 if (0) {
|
|
|
729 s=(char *)cadr(e1);
|
|
|
730 lb=fwdlabel();
|
|
|
731 printf("\tjmp _%d\n",lb);
|
|
|
732 i=backdef();
|
|
|
733 ascii(s);
|
|
|
734 printf("\t.align 2\n");
|
|
|
735 fwddef(lb);
|
|
|
736 printf("\tlea _%d,%s\n",i,crn);
|
|
|
737 } else {
|
|
|
738 s=(char *)cadr(e1);
|
|
|
739 printf(".section\t.rodata\n");
|
|
|
740 lb=fwdlabel();
|
|
|
741 printf("_%d:\n",lb);
|
|
|
742 ascii(s);
|
|
|
743 if (output_mode==TEXT_EMIT_MODE) {
|
|
|
744 printf(".text\n");
|
|
|
745 } else {
|
|
|
746 text_mode();
|
|
|
747 }
|
|
|
748 printf("\tlea _%d,%s\n",lb,crn);
|
|
|
749 }
|
|
|
750 }
|
|
|
751
|
|
|
752 void
|
|
|
753 function(e1)
|
|
|
754 int e1;
|
|
|
755 {
|
|
|
756 int e2,e3,e4,e5,nargs;
|
|
|
757 NMTBL *n;
|
|
|
758
|
|
|
759 e2 = cadr(e1);
|
|
|
760 nargs = 0;
|
|
|
761 for (e3 = caddr(e1); e3; e3 = cadr(e3)) {
|
|
|
762 n=(NMTBL *)(e5=(cadr(e4 = car(e3))));
|
|
|
763 switch(car(e4)) {
|
|
|
764 case FNAME:
|
|
|
765 printf("\tlea %s,%s\n",n->nm,crn);
|
|
|
766 printf("\tpushl %s\n",crn);
|
|
|
767 break;
|
|
|
768 case ADDRESS:
|
|
|
769 g_expr(e5);
|
|
|
770 printf("\tpushl %s\n",crn);
|
|
|
771 break;
|
|
|
772 default:g_expr(e4);
|
|
|
773 printf("\tpushl %s\n",crn);
|
|
|
774 }
|
|
|
775 ++nargs;
|
|
|
776 }
|
|
|
777 if (car(e2) == FNAME) {
|
|
|
778 n=(NMTBL *)cadr(e2);
|
|
|
779 use_register(creg,REG_EAX,0);
|
|
|
780 printf("\tcall\t%s\n",n->nm);
|
|
|
781 } else {
|
|
|
782 g_expr(e2);
|
|
|
783 use_register(creg,REG_EAX,0);
|
|
|
784 printf("\tcall\t*%s\n",crn);
|
|
|
785 }
|
|
|
786 if (nargs) printf("\taddl $%d,%%esp\n",4*nargs);
|
|
|
787 }
|
|
|
788
|
|
|
789 void
|
|
|
790 jump(e1, env)
|
|
|
791 int e1;
|
|
|
792 int env;
|
|
|
793 {
|
|
|
794 int i,e2,e3,e4,e5,nargs,regs;
|
|
|
795 NMTBL *n,*code0;
|
|
|
796 int new_disp;
|
|
|
797 char *xrn;
|
|
|
798
|
|
|
799 /* count number of args */
|
|
|
800 nargs = 0;
|
|
|
801 for (e3 = caddr(e1); e3;e3 =cadr(e3)) nargs++;
|
|
|
802 new_disp = -(nargs-MAX_REGISTER_VAR)*int_size;
|
|
|
803 if (new_disp > 0)
|
|
|
804 new_disp=0;
|
|
|
805 /* printf("# new_disp %d,disp %d\n",new_disp,disp); */
|
|
|
806 if (new_disp < disp) {
|
|
|
807 printf("\tlea %d(%%ebp),%%esp\n",new_disp+disp_offset);
|
|
|
808 }
|
|
|
809 /* compute jump address */
|
|
|
810 e2 = cadr(e1);
|
|
|
811 if (car(e2) == FNAME) {
|
|
|
812 code0=(NMTBL *)cadr(e2);
|
|
|
813 if (code0->sc!=CODE) {
|
|
|
814 error(STERR); return;
|
|
|
815 }
|
|
|
816 } else { /* indirect */
|
|
|
817 g_expr(e2);
|
|
|
818 emit_push();
|
|
|
819 }
|
|
|
820 /* compute arguments */
|
|
|
821 regs = nargs-1;
|
|
|
822 i=0;
|
|
|
823 for (e3 = caddr(e1); e3;e3 =cadr(e3),i++) {
|
|
|
824 n=(NMTBL *)(e5=(cadr(e4 = car(e3))));
|
|
|
825 switch(car(e4)) {
|
|
|
826 case FNAME:
|
|
|
827 printf("\tlea %s,%s\n",n->nm,crn);
|
|
|
828 emit_push();
|
|
|
829 break;
|
|
|
830 case ADDRESS:
|
|
|
831 g_expr(e5);
|
|
|
832 emit_push();
|
|
|
833 break;
|
|
|
834 /*
|
|
|
835 printf("# cadr(e4) %d ==disp_offset+(-1-i)*int_size %d\n", cadr(e4), disp_offset+(-2-i)*int_size);
|
|
|
836 */
|
|
|
837 case RLVAR:
|
|
|
838 case CRLVAR:
|
|
|
839 if (env==0 && cadr(e4)==disp_offset+(-1-i)*int_size) {
|
|
|
840 /* Same positioned local variable. No need to copy */
|
|
|
841 reg_stack[reg_sp++] = -2;
|
|
|
842 --regs;
|
|
|
843 continue;
|
|
|
844 }
|
|
|
845 case REGISTER:
|
|
|
846 if (rname[cadr(e4)]==REG_ESI+regs) {
|
|
|
847 /* Same register variable. No need to copy */
|
|
|
848 reg_stack[reg_sp++] = cadr(e4);
|
|
|
849 --regs;
|
|
|
850 continue;
|
|
|
851 }
|
|
|
852 default:
|
|
|
853 g_expr(e4);
|
|
|
854 emit_push();
|
|
|
855 }
|
|
|
856 --regs;
|
|
|
857 }
|
|
|
858 /* save frame pointer before jump in fuction */
|
|
|
859 if (fnptr->sc==FUNCTION) {
|
|
|
860 printf("\tmovl %%ebp,%d(%%ebp)\n",disp_offset);
|
|
|
861 }
|
|
|
862 if (env) {
|
|
|
863 /* change frame pointer */
|
|
|
864 g_expr(env);
|
|
|
865 printf("\tmovl %s,%%ebp\n",crn);
|
|
|
866 }
|
|
|
867 /* copy arguments to destination environment if necessary */
|
|
|
868 for(i=0;i<nargs;i++) {
|
|
|
869 if (i>=MAX_REGISTGER_VAR) {
|
|
|
870 if (reg_stack[reg_sp-1]== -2) {
|
|
|
871 /* same positioned variable */
|
|
|
872 reg_sp--;
|
|
|
873 } else {
|
|
|
874 xrn=emit_pop(0);
|
|
|
875 printf("\tmovl %s,%d(%%ebp)\n",xrn,
|
|
|
876 disp_offset+(-(nargs-i))*int_size);
|
|
|
877 }
|
|
|
878 } else if (reg_stack[--reg_sp]>=REG_ESI) {
|
|
|
879 /* the same registger */
|
|
|
880 ;
|
|
|
881 } else {
|
|
|
882 if(reg_stack[reg_sp]<0) {
|
|
|
883 printf("\tpopl %s\n",reg_name[rname[REG_ESI+i]]);
|
|
|
884 } else {
|
|
|
885 printf("\tmovl %s,%s\n",
|
|
|
886 reg_name[rname[reg_stack[reg_sp]]],
|
|
|
887 reg_name[rname[REG_ESI+i]]);
|
|
|
888 free_register(reg_stack[reg_sp]);
|
|
|
889 }
|
|
|
890 }
|
|
|
891 }
|
|
|
892 if (car(e2) != FNAME) {
|
|
|
893 xrn=emit_pop(0);
|
|
|
894 }
|
|
|
895 /* printf("# new_disp %d,disp %d\n",new_disp,disp); */
|
|
|
896 if (new_disp>disp) {
|
|
|
897 /* shrink stack if necessary */
|
|
|
898 printf("\tlea %d(%%ebp),%%esp\n",new_disp+disp_offset);
|
|
|
899 }
|
|
|
900 if (fnptr->sc==FUNCTION) {
|
|
|
901 /* link operation for leave, %ebp must point saved old %ebp */
|
|
|
902 printf("\tlea %d(%%ebp),%%ebp\n",disp_offset);
|
|
|
903 }
|
|
|
904 if (car(e2) == FNAME) {
|
|
|
905 printf("\tjmp %s\n",code0->nm);
|
|
|
906 } else {
|
|
|
907 printf("\tjmp *%s\n",xrn);
|
|
|
908 }
|
|
|
909 }
|
|
|
910
|
|
|
911
|
|
|
912 void
|
|
|
913 machinop(e1)
|
|
|
914 int e1;
|
|
|
915 {
|
|
|
916 int e2,e3,op;
|
|
|
917
|
|
|
918 e2 = cadr(e1);
|
|
|
919 op = car(e1);
|
|
|
920 e3 = caddr(e1);
|
|
|
921 g_expr(e3);
|
|
|
922 emit_push();
|
|
|
923 g_expr(e2);
|
|
|
924 tosop(car(e1));
|
|
|
925 return;
|
|
|
926 }
|
|
|
927
|
|
|
928
|
|
|
929 void
|
|
|
930 rindirect(e1)
|
|
|
931 int e1; /* *(p +5 ) */
|
|
|
932
|
|
|
933 {
|
|
|
934 char *op;
|
|
|
935 int e2,e3,byte;
|
|
|
936
|
|
|
937 op = ((byte = (car(e1) == CRINDIRECT)) ? "movsbl" : "movl");
|
|
|
938 e3 = cadr(e2 = cadr(e1));
|
|
|
939 g_expr(e2);
|
|
|
940 printf("\t%s (%s),%s\n",op,crn,crn);
|
|
|
941 }
|
|
|
942
|
|
|
943 void
|
|
|
944 sassign(e1)
|
|
|
945 int e1;
|
|
|
946 {
|
|
|
947 int e2,e3,e4,sz;
|
|
|
948 char *xrn;
|
|
|
949
|
|
|
950 e2 = cadr(e1);
|
|
|
951 e3 = cadr(e2);
|
|
|
952 e4 = caddr(e1);
|
|
|
953 sz = size(cadr(e2)); /* cld rep movsb */
|
|
|
954 g_expr(e4);
|
|
|
955 emit_push();
|
|
|
956 g_expr(e2);
|
|
|
957 xrn = emit_pop(0);
|
|
|
958 return;
|
|
|
959 }
|
|
|
960
|
|
|
961 void
|
|
|
962 assign(e1)
|
|
|
963 int e1;
|
|
|
964 {
|
|
|
965 char *op;
|
|
|
966 int e2,e3,e4,byte;
|
|
|
967 char *xrn;
|
|
|
968
|
|
|
969 op = ((byte=(car(e1) == CASS))? "movb" : "movl");
|
|
|
970 /* e2=e4 */
|
|
|
971 e2 = cadr(e1);
|
|
|
972 e3 = cadr(e2);
|
|
|
973 e4 = caddr(e1);
|
|
|
974 switch(car(e2)) {
|
|
|
975 case GVAR: /* i=3 */
|
|
|
976 g_expr(e4);
|
|
|
977 if (byte) use_data_reg(creg,1);
|
|
|
978 printf("\t%s %s,%s\n",op,crn,caddr(e2));
|
|
|
979 return;
|
|
|
980 case LVAR:
|
|
|
981 g_expr(e4);
|
|
|
982 if (byte) use_data_reg(creg,1);
|
|
|
983 printf("\t%s %s,%d(%%ebp)\n",op,crn,lvar(cadr(e2)));
|
|
|
984 return;
|
|
|
985 case REGISTER:
|
|
|
986 g_expr(e4);
|
|
|
987 if (creg!=cadr(e2))
|
|
|
988 printf("\t%s %s,%s\n",op,crn,register_name(cadr(e2)));
|
|
|
989 return;
|
|
|
990 }
|
|
|
991 g_expr(e4);
|
|
|
992 emit_push();
|
|
|
993 g_expr(e2);
|
|
|
994 xrn = emit_pop(0);
|
|
|
995 if (byte) use_data_reg(creg,1);
|
|
|
996 printf("\t%s %s,(%s)\n",op,xrn,crn);
|
|
|
997 printf("\tmovl %s,%s\n",xrn,crn);
|
|
|
998 return;
|
|
|
999 }
|
|
|
1000
|
|
|
1001 void
|
|
|
1002 assop(e1)
|
|
|
1003 int e1;
|
|
|
1004 {
|
|
|
1005 int e2,e3,byte,op,new_reg;
|
|
|
1006 char *xrn;
|
|
|
1007
|
|
|
1008 /* e2 op= e3 */
|
|
|
1009 byte = (car(e1) == CASSOP);
|
|
|
1010 e2 = cadr(e1);
|
|
|
1011 if (car(e2)==INDIRECT) e2=cadr(e2);
|
|
|
1012 e3 = caddr(e1);
|
|
|
1013 op = cadddr(e1);
|
|
|
1014
|
|
|
1015 g_expr(e3);
|
|
|
1016 emit_push();
|
|
|
1017 if (car(e2)==REGISTER) {
|
|
|
1018 new_reg=creg;
|
|
|
1019 set_crn(cadr(e2));
|
|
|
1020 tosop(op);
|
|
|
1021 set_crn(new_reg);
|
|
|
1022 printf("\tmovl %s,%s\n",register_name(cadr(e2)),crn);
|
|
|
1023 return;
|
|
|
1024 }
|
|
|
1025 g_expr(e2);
|
|
|
1026 xrn = emit_pop(0); /* pop e3 value */
|
|
|
1027 printf("\tpushl %s # assop \n",crn); /* push e2 address */
|
|
|
1028 ld_indexx(byte,0,crn);
|
|
|
1029 new_reg = get_register();
|
|
|
1030 /* push e3 value */
|
|
|
1031 if(new_reg<0) { /* もうレジスタがない */
|
|
|
1032 reg_stack[reg_sp++] = -1;
|
|
|
1033 printf("\tpushl %s\n",xrn);
|
|
|
1034 } else {
|
|
|
1035 reg_stack[reg_sp++] = xreg; /* push するかわりにレジスタを使う */
|
|
|
1036 }
|
|
|
1037 tosop(op);
|
|
|
1038 if(new_reg>=0) free_register(new_reg);
|
|
|
1039 printf("\tpopl %s # assop \n",drn);
|
|
|
1040 printf("\t%s %s,(%s)\n",byte ? "movb" : "movl",crn,drn);
|
|
|
1041 return;
|
|
|
1042
|
|
|
1043 }
|
|
|
1044
|
|
|
1045
|
|
|
1046 void
|
|
|
1047 tosop(op)
|
|
|
1048 int op;
|
|
|
1049 {
|
|
|
1050 int oreg;
|
|
|
1051 char *orn;
|
|
|
1052
|
|
|
1053 oreg = pop_register();
|
|
|
1054 switch(op) {
|
|
|
1055 case LSHIFT:
|
|
|
1056 case ULSHIFT:
|
|
|
1057 shift("sall",oreg);
|
|
|
1058 return;
|
|
|
1059 case RSHIFT:
|
|
|
1060 shift("sarl",oreg);
|
|
|
1061 return;
|
|
|
1062 case URSHIFT:
|
|
|
1063 shift("shrl",oreg);
|
|
|
1064 return;
|
|
|
1065 }
|
|
|
1066 if(oreg==-1) {
|
|
|
1067 printf("\tpopl %s\n",drn);
|
|
|
1068 oreg = dreg;
|
|
|
1069 }
|
|
|
1070 orn = reg_name[rname[oreg]];
|
|
|
1071 switch(op) {
|
|
|
1072 case ADD:
|
|
|
1073 printf("\taddl %s,%s\n",orn,crn);
|
|
|
1074 return;
|
|
|
1075 case SUB:
|
|
|
1076 printf("\tsubl %s,%s\n",orn,crn);
|
|
|
1077 return;
|
|
|
1078 case BAND:
|
|
|
1079 printf("\tandl %s,%s\n",orn,crn);
|
|
|
1080 return;
|
|
|
1081 case EOR:
|
|
|
1082 printf("\txorl %s,%s\n",orn,crn);
|
|
|
1083 return;
|
|
|
1084 case BOR:
|
|
|
1085 printf("\torl %s,%s\n",orn,crn);
|
|
|
1086 return;
|
|
|
1087 case MUL:
|
|
|
1088 case UMUL:
|
|
|
1089 /* use_register(dreg,REG_EDX,0); */
|
|
|
1090 printf("\t%s %s,%s\n","imull",orn,crn);
|
|
|
1091 return;
|
|
|
1092 case DIV:
|
|
|
1093 case UDIV:
|
|
|
1094 orn = div_setup(oreg);
|
|
|
1095 if (op==DIV)
|
|
|
1096 printf("\tcltd\n\tdivl %s\n",orn);
|
|
|
1097 else
|
|
|
1098 printf("\txor %%edx,%%edx\n\tidivl %s\n",orn);
|
|
|
1099 div_cleanup(orn);
|
|
|
1100 return;
|
|
|
1101 case MOD:
|
|
|
1102 case UMOD:
|
|
|
1103 orn = div_setup(oreg);
|
|
|
1104 if (op==DIV)
|
|
|
1105 printf("\tcltd\n\tdivl %s\n",orn);
|
|
|
1106 else
|
|
|
1107 printf("\txor %%edx,%%edx\n\tidivl %s\n",orn);
|
|
|
1108 rname[creg]=REG_EDX;
|
|
|
1109 crn=reg_name[REG_EDX];
|
|
|
1110 rname[dreg]=REG_EAX;
|
|
|
1111 drn=reg_name[REG_EAX];
|
|
|
1112 div_cleanup(orn);
|
|
|
1113 return;
|
|
|
1114 }
|
|
|
1115 }
|
|
|
1116
|
|
|
1117 static char *dvi_push = "(%esp)";
|
|
|
1118
|
|
|
1119 char *
|
|
|
1120 div_setup(oreg)
|
|
|
1121 int oreg;
|
|
|
1122 {
|
|
|
1123 if (oreg<0) {
|
|
|
1124 use_register(creg,REG_EAX,1);
|
|
|
1125 use_register(dreg,REG_EDX,0);
|
|
|
1126 return 0;
|
|
|
1127 }
|
|
|
1128 if (register_full()) {
|
|
|
1129 printf("\tpushl %s\n",reg_name[rname[oreg]]);
|
|
|
1130 use_register(creg,REG_EAX,1);
|
|
|
1131 use_register(oreg,REG_EDX,0);
|
|
|
1132 return dvi_push;
|
|
|
1133 }
|
|
|
1134 regs[oreg]=1;
|
|
|
1135 use_register(creg,REG_EAX,1);
|
|
|
1136 use_register(dreg,REG_EDX,0);
|
|
|
1137 regs[oreg]=0;
|
|
|
1138 return reg_name[rname[oreg]];
|
|
|
1139 }
|
|
|
1140
|
|
|
1141 div_cleanup(orn)
|
|
|
1142 char *orn;
|
|
|
1143 {
|
|
|
1144 if (orn==dvi_push)
|
|
|
1145 printf("\taddl $4,%%esp\n");
|
|
|
1146 }
|
|
|
1147
|
|
|
1148 void
|
|
|
1149 shift(op, reg)
|
|
|
1150 char *op;
|
|
|
1151 int reg;
|
|
|
1152 {
|
|
|
1153 if (reg>=0) {
|
|
|
1154 use_register(lreg,REG_ECX,1);
|
|
|
1155 } else {
|
|
|
1156 use_register(dreg,REG_ECX,0);
|
|
|
1157 printf("\tpopl %%ecx\n");
|
|
|
1158 }
|
|
|
1159 printf("\t%s %%cl,%s\n",op,crn);
|
|
|
1160 }
|
|
|
1161
|
|
|
1162 void
|
|
|
1163 ld_indexx(byte, n, xrn)
|
|
|
1164 int byte;
|
|
|
1165 int n;
|
|
|
1166 char *xrn;
|
|
|
1167 {
|
|
|
1168 char *op;
|
|
|
1169
|
|
|
1170 op = byte ? "movsbl" : "movl";
|
|
|
1171 if (n)
|
|
|
1172 printf("\t%s %d(%s),%s\n",op,n,xrn,crn);
|
|
|
1173 else
|
|
|
1174 printf("\t%s (%s),%s\n",op,xrn,crn);
|
|
|
1175 }
|
|
|
1176
|
|
|
1177 void
|
|
|
1178 st_indexx(byte, n, xrn)
|
|
|
1179 int byte;
|
|
|
1180 int n;
|
|
|
1181 char *xrn;
|
|
|
1182 {
|
|
|
1183 char *op;
|
|
|
1184
|
|
|
1185 op = byte ? "movb" : "movl";
|
|
|
1186 if (n)
|
|
|
1187 printf("\t%s %s,%d(%s)\n",op,crn,n,xrn);
|
|
|
1188 else
|
|
|
1189 printf("\t%s %s,(%s)\n",op,crn,xrn);
|
|
|
1190 }
|
|
|
1191
|
|
|
1192 void
|
|
|
1193 indexy(op, gvar)
|
|
|
1194 char *op;
|
|
|
1195 char *gvar;
|
|
|
1196 {
|
|
|
1197 printf("\t%s %s,%s\n",op,crn,gvar);
|
|
|
1198 }
|
|
|
1199
|
|
|
1200 void
|
|
|
1201 cmpdimm(e, csreg)
|
|
|
1202 int e;
|
|
|
1203 int csreg;
|
|
|
1204 {
|
|
|
1205 /* used in dosiwtch() */
|
|
|
1206 use_register(creg,csreg,0);
|
|
|
1207 printf("\tcmpl $%d,%s\n",e,crn);
|
|
|
1208 }
|
|
|
1209
|
|
|
1210 void
|
|
|
1211 opening(filename)
|
|
|
1212 char *filename;
|
|
|
1213 {
|
|
|
1214 printf("\t.file \"%s\"\n",filename);
|
|
|
1215 printf("\t.version\t\"01.01\"\n");
|
|
|
1216 printf("gcc2_compiled.:\n");
|
|
|
1217 printf(".text\n");
|
|
|
1218 emit_init();
|
|
|
1219 }
|
|
|
1220
|
|
|
1221 void
|
|
|
1222 closing()
|
|
|
1223 {
|
|
|
1224 global_table();
|
|
|
1225 printf("\t.ident \"Micro-C compiled\"\n");
|
|
|
1226 }
|
|
|
1227
|
|
|
1228 void
|
|
|
1229 jmp_label(l)
|
|
|
1230 int l;
|
|
|
1231 {
|
|
|
1232 printf("\tjmp\t_%d\n",l);
|
|
|
1233 }
|
|
|
1234
|
|
|
1235 void
|
|
|
1236 jmp_eq_label(l)
|
|
|
1237 int l;
|
|
|
1238 {
|
|
|
1239 printf("\tje\t_%d\n",l);
|
|
|
1240 }
|
|
|
1241
|
|
|
1242 void
|
|
|
1243 rexpr(e1, l1, s)
|
|
|
1244 int e1;
|
|
|
1245 int l1;
|
|
|
1246 char *s;
|
|
|
1247 {
|
|
|
1248 g_expr(list3(SUB,cadr(e1),caddr(e1)));
|
|
|
1249 printf("\tj%s\t_%d\n",s,l1);
|
|
|
1250 }
|
|
|
1251
|
|
|
1252 void
|
|
|
1253 jcond(l, cond)
|
|
|
1254 int l;
|
|
|
1255 char cond;
|
|
|
1256 {
|
|
|
1257 printf("\tj%s\t_%d\n",cond?"ne":"e",l);
|
|
|
1258 }
|
|
|
1259
|
|
|
1260 void
|
|
|
1261 jmp(l)
|
|
|
1262 int l;
|
|
|
1263 {
|
|
|
1264 control=0;
|
|
|
1265 printf("\tjmp\t_%d\n",l);
|
|
|
1266 /* align? */
|
|
|
1267 }
|
|
|
1268
|
|
|
1269 int
|
|
|
1270 fwdlabel()
|
|
|
1271 {
|
|
|
1272 return labelno++;
|
|
|
1273 }
|
|
|
1274
|
|
|
1275 void
|
|
|
1276 fwddef(l)
|
|
|
1277 int l;
|
|
|
1278 {
|
|
|
1279 control=1;
|
|
|
1280 printf("_%d:\n",l);
|
|
|
1281 }
|
|
|
1282
|
|
|
1283 int
|
|
|
1284 backdef()
|
|
|
1285 {
|
|
|
1286 control=1;
|
|
|
1287 printf("_%d:\n",labelno);
|
|
|
1288 return labelno++;
|
|
|
1289 }
|
|
|
1290
|
|
|
1291 void
|
|
|
1292 def_label(cslabel, dlabel)
|
|
|
1293 int cslabel;
|
|
|
1294 int dlabel;
|
|
|
1295 {
|
|
|
1296 int fl;
|
|
|
1297
|
|
|
1298 fl = 0;
|
|
|
1299 if (control) {
|
|
|
1300 jmp(fl=fwdlabel());
|
|
|
1301 }
|
|
|
1302 fwddef(cslabel);
|
|
|
1303 if (dlabel)
|
|
|
1304 jmp(dlabel);
|
|
|
1305 if (fl) {
|
|
|
1306 fwddef(fl);
|
|
|
1307 }
|
|
|
1308 }
|
|
|
1309
|
|
|
1310 void
|
|
|
1311 gen_comment(s)
|
|
|
1312 char *s;
|
|
|
1313 {
|
|
|
1314 printf("# %s",s);
|
|
|
1315 }
|
|
|
1316
|
|
|
1317 void
|
|
|
1318 gen_source(s)
|
|
|
1319 char *s;
|
|
|
1320 {
|
|
|
1321 printf("%s",s);
|
|
|
1322 }
|
|
|
1323
|
|
|
1324 void
|
|
|
1325 code_enter(name)
|
|
|
1326 char *name;
|
|
|
1327 {
|
|
|
1328 disp_offset = code_disp_offset;
|
|
|
1329 emit_init();
|
|
|
1330 printf("\t.align 4\n");
|
|
|
1331 if (stmode!=STATIC)
|
|
|
1332 printf(".globl %s\n",name);
|
|
|
1333 printf("\t.type\t%s,@function\n",name);
|
|
|
1334 printf("%s:\n",name);
|
|
|
1335 }
|
|
|
1336
|
|
|
1337 void
|
|
|
1338 code_enter1(disp)
|
|
|
1339 int disp;
|
|
|
1340 {
|
|
|
1341 if(disp) {
|
|
|
1342 printf("\tsubl $%d,%%esp\n",-disp);
|
|
|
1343 }
|
|
|
1344 }
|
|
|
1345
|
|
|
1346 void
|
|
|
1347 code_leave(name)
|
|
|
1348 char *name;
|
|
|
1349 {
|
|
|
1350 local_table();
|
|
|
1351 printf("_%d:\n",labelno);
|
|
|
1352 printf("\t.size\t%s,_%d-%s\n",name,labelno,name);
|
|
|
1353 labelno++;
|
|
|
1354 }
|
|
|
1355
|
|
|
1356 void
|
|
|
1357 enter(name)
|
|
|
1358 char *name;
|
|
|
1359 {
|
|
|
1360 disp_offset = func_disp_offset;
|
|
|
1361 emit_init();
|
|
|
1362 printf("\t.align 2\n");
|
|
|
1363 if (stmode!=STATIC)
|
|
|
1364 printf(".globl %s\n",name);
|
|
|
1365 printf("%s:\n",name);
|
|
|
1366 printf("\t.type\t%s,@function\n",name);
|
|
|
1367 printf("\tpushl %%ebp\n");
|
|
|
1368 printf("\tmovl %%esp,%%ebp\n");
|
|
|
1369 printf("\tpushl %%ebx\n");
|
|
|
1370 printf("\tpushl %%ecx\n");
|
|
|
1371 printf("\tpushl %%edx\n");
|
|
|
1372 if (REGISTERS6) {
|
|
|
1373 printf("\tpushl %%edi\n");
|
|
|
1374 printf("\tpushl %%esi\n");
|
|
|
1375 }
|
|
|
1376 }
|
|
|
1377
|
|
|
1378 void
|
|
|
1379 enter1(disp)
|
|
|
1380 int disp;
|
|
|
1381 {
|
|
|
1382 if(disp) printf("\tsubl $%d,%%esp\n",-disp);
|
|
|
1383 }
|
|
|
1384
|
|
|
1385 void
|
|
|
1386 leave(control, name)
|
|
|
1387 int control;
|
|
|
1388 char *name;
|
|
|
1389 {
|
|
|
1390 if (control)
|
|
|
1391 use_register(creg,REG_EAX,1);
|
|
|
1392 if (retcont) {
|
|
|
1393 if (control)
|
|
|
1394 jmp(retlabel);
|
|
|
1395 fwddef(retcont);
|
|
|
1396 use_register(creg,REG_EAX,0);
|
|
|
1397 printf("\tmovl %s,%s\n",reg_name[REG_ESI],crn);
|
|
|
1398 /* printf("\tleave\n"); */
|
|
|
1399 }
|
|
|
1400 fwddef(retlabel);
|
|
|
1401 use_register(creg,REG_EAX,0);
|
|
|
1402 if (REGISTERS6) {
|
|
|
1403 printf("\tpopl %%esi\n");
|
|
|
1404 printf("\tpopl %%edi\n");
|
|
|
1405 }
|
|
|
1406 /* if(disp) printf("\taddl $%d,%%esp\n",-disp); */
|
|
|
1407 printf("\tlea %d(%%ebp),%%esp\n",disp_offset);
|
|
|
1408 printf("\tpopl %%edx\n");
|
|
|
1409 printf("\tpopl %%ecx\n");
|
|
|
1410 printf("\tpopl %%ebx\n");
|
|
|
1411 printf("\tleave\n");
|
|
|
1412 printf("\tret\n");
|
|
|
1413 local_table();
|
|
|
1414 printf("_%d:\n",labelno);
|
|
|
1415 printf("\t.size\t%s,_%d-%s\n",name,labelno,name);
|
|
|
1416 labelno++;
|
|
|
1417 }
|
|
|
1418
|
|
|
1419
|
|
|
1420 void
|
|
|
1421 ret()
|
|
|
1422 {
|
|
|
1423 use_register(creg,REG_EAX,1);
|
|
|
1424 jmp(retlabel);
|
|
|
1425 }
|
|
|
1426
|
|
|
1427 void
|
|
|
1428 gen_gdecl(n, gpc)
|
|
|
1429 char *n;
|
|
|
1430 int gpc;
|
|
|
1431 {
|
|
|
1432 /*
|
|
|
1433 if (stmode!=STATIC)
|
|
|
1434 printf(".globl %s\n",n);
|
|
|
1435 */
|
|
|
1436 }
|
|
|
1437
|
|
|
1438 void
|
|
|
1439 align(t)
|
|
|
1440 int t;
|
|
|
1441 {
|
|
|
1442 if (t!=CHAR) {
|
|
|
1443 if (data_alignment & 1)
|
|
|
1444 printf("\t.align 2\n");
|
|
|
1445 data_alignment = 0;
|
|
|
1446 }
|
|
|
1447 }
|
|
|
1448
|
|
|
1449 void
|
|
|
1450 emit_data(e, t, n)
|
|
|
1451 int e;
|
|
|
1452 int t;
|
|
|
1453 NMTBL *n;
|
|
|
1454 {
|
|
|
1455 int l;
|
|
|
1456 char *name;
|
|
|
1457 name = n->nm;
|
|
|
1458 if(mode==GDECL) { /* global */
|
|
|
1459 if (n->dsp != -1) {
|
|
|
1460 n->dsp = -1; /* initiallized flag */
|
|
|
1461 printf(".globl\t%s\n",name);
|
|
|
1462 data_mode(name);
|
|
|
1463 align(t);
|
|
|
1464 printf("%s:\n",name);
|
|
|
1465 } else {
|
|
|
1466 data_mode(0);
|
|
|
1467 }
|
|
|
1468 if(car(e)==CONST) {
|
|
|
1469 if (t==CHAR) {
|
|
|
1470 printf("\t.byte %d\n",cadr(e));
|
|
|
1471 if (data_alignment>0)
|
|
|
1472 data_alignment++;
|
|
|
1473 gpc += 1;
|
|
|
1474 } else {
|
|
|
1475 printf("\t.long %d\n",cadr(e));
|
|
|
1476 gpc += int_size;
|
|
|
1477 }
|
|
|
1478 } else if(t!=CHAR) {
|
|
|
1479 gpc += int_size;
|
|
|
1480 if(car(e)==ADDRESS&&car(cadr(e))==GVAR) {
|
|
|
1481 printf("\t.long %s\n",caddr(cadr(e)));
|
|
|
1482 } else if(car(e)==FNAME) {
|
|
|
1483 printf("\t.long %s\n",((NMTBL *)cadr(e))->nm);
|
|
|
1484 } else if(car(e)==STRING) {
|
|
|
1485 if (car(n->ty)!=ARRAY || cadr(n->ty)!=CHAR) {
|
|
|
1486 l = fwdlabel();
|
|
|
1487 printf("\t.long _%d\n",l);
|
|
|
1488 printf(".section\t.rodata\n");
|
|
|
1489 printf("_%d:\n",l);
|
|
|
1490 output_mode = RODATA_EMIT_MODE;
|
|
|
1491 }
|
|
|
1492 ascii((char *)cadr(e));
|
|
|
1493 } else error(TYERR);
|
|
|
1494 }
|
|
|
1495 } else {
|
|
|
1496 /* if (n->sc!=LVAR) { error(TYERR); return; } */
|
|
|
1497 if(car(e)==CONST) {
|
|
|
1498 printf("\tmovl $%d,%s\n",cadr(e),crn);
|
|
|
1499 printf("\t%s %s,%d(%%ebp)\n",t==CHAR?"movsbl":"movl",crn,n->dsp);
|
|
|
1500 } else if(t!=CHAR) {
|
|
|
1501 if(car(e)==ADDRESS&&car(cadr(e))==GVAR)
|
|
|
1502 printf("\tlea %s,%s\n",caddr(e),crn);
|
|
|
1503 else if(car(e)==FNAME)
|
|
|
1504 printf("\tlea %s,%s\n",((NMTBL *)cadr(e))->nm,crn);
|
|
|
1505 else if(car(e)==STRING) {
|
|
|
1506 string(e);
|
|
|
1507 } else error(TYERR);
|
|
|
1508 printf("\tmovl %s,%d(%%ebp)\n",crn,n->dsp);
|
|
|
1509 }
|
|
|
1510 }
|
|
|
1511 }
|
|
|
1512
|
|
|
1513 void
|
|
|
1514 emit_data_closing(n)
|
|
|
1515 NMTBL *n;
|
|
|
1516 {
|
|
|
1517 int lb;
|
|
|
1518 if (mode=GDECL) {
|
|
|
1519 data_mode(0);
|
|
|
1520 lb=fwdlabel();
|
|
|
1521 printf("_%d:\n",lb);
|
|
|
1522 printf("\t.size\t%s,_%d-%s\n",n->nm,lb,n->nm);
|
|
|
1523 }
|
|
|
1524 }
|
|
|
1525
|
|
|
1526 void
|
|
|
1527 global_table()
|
|
|
1528 {
|
|
|
1529 NMTBL *n;
|
|
|
1530 for(n=ntable;n < &ntable[GSYMS];n++) {
|
|
|
1531 if (n->sc == GVAR && n->dsp != -1) {
|
|
|
1532 /* n->dsp = -1 means initialized global */
|
|
|
1533 printf(".comm %s,%d\n",n->nm,size(n->ty));
|
|
|
1534 }
|
|
|
1535 }
|
|
|
1536 }
|
|
|
1537
|
|
|
1538 void
|
|
|
1539 local_table()
|
|
|
1540 {
|
|
|
1541 NMTBL *n;
|
|
|
1542 /* static local variables */
|
|
|
1543 for(n=ntable+GSYMS;n < &ntable[GSYMS+LSYMS];n++) {
|
|
|
1544 if (n->sc == GVAR) {
|
|
|
1545 printf(".lcomm %s,%d\n",n->nm,size(n->ty));
|
|
|
1546 }
|
|
|
1547 }
|
|
|
1548 }
|
|
|
1549
|
|
|
1550 void
|
|
|
1551 text_mode()
|
|
|
1552 {
|
|
|
1553 if (output_mode!=TEXT_EMIT_MODE) {
|
|
|
1554 printf(".text\n");
|
|
|
1555 printf("\t.align 2\n");
|
|
|
1556 output_mode = TEXT_EMIT_MODE;
|
|
|
1557 }
|
|
|
1558 }
|
|
|
1559
|
|
|
1560 void
|
|
|
1561 data_mode(name)
|
|
|
1562 char *name;
|
|
|
1563 {
|
|
|
1564 if (output_mode!=DATA_EMIT_MODE) {
|
|
|
1565 printf(".data\n");
|
|
|
1566 output_mode = DATA_EMIT_MODE;
|
|
|
1567 }
|
|
|
1568 if (name)
|
|
|
1569 printf("\t.type\t%s,@object\n",name);
|
|
|
1570 }
|
|
|
1571
|
|
|
1572 int
|
|
|
1573 lvar(l)
|
|
|
1574 int l;
|
|
|
1575 {
|
|
|
1576 if (l<0) {
|
|
|
1577 if (fnptr->sc==CODE)
|
|
|
1578 return l+code_disp_offset;
|
|
|
1579 else
|
|
|
1580 return l+disp_offset;
|
|
|
1581 } else {
|
|
|
1582 return l+arg_offset;
|
|
|
1583 }
|
|
|
1584 }
|
|
|
1585
|
|
|
1586 /* end */
|
