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61
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1 /* Micro-C Generic Code Generatation Part */
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2 /* $Id$ */
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3
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4 #define EXTERN extern
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5 #include "mc.h"
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6 #include "mc-codegen.h"
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7 #include "mc-code.h"
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8
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9 int creg; /* current register */
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10 int dreg; /* temporary register */
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11 int reg_sp; /* REGister Stack-Pointer */
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12
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81
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13 int freg; /* current floating point register */
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14
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61
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15 /*
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16 creg currrent virtual register
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17 dreg spare virtual register
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18
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19 rname[creg] currrent real register
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20 rname[dreg] spare real register
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21
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22 regs[] virtual register usage
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23 regv[] value in virtual register flag
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24
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25 reg_name[rname[creg]]
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26 */
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27
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28 void remove0(int *parent,int e) ;
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29 void remove0_all(int *parent,int e) ;
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30 int is_same_type(int e1,int e2);
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31 void jump(int e1, int env);
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32 void machinop(int e1);
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33 void sassign(int e1);
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34 void assign(int e1);
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35 void assop(int e1);
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36
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37 int
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38 get_register(void)
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39 { /* 使われていないレジスタを調べる */
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40 int i;
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41 for(i=0;i<MAX_REGISTER;i++) {
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42 if (! regs[i]) { /* 使われていないなら */
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43 regs[i]=1; /* そのレジスタを使うことを宣言し */
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44 return i; /* その場所を表す番号を返す */
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45 }
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46 }
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47 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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48 }
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49
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50 void
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51 free_register(int i) { /* いらなくなったレジスタを開放 */
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52 regv[i]=regs[i]=0;
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53 }
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54
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55 int
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56 register_full(void)
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57 {
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58 int i;
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59 for(i=0;i<MAX_REGISTER;i++) {
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60 if (! regs[i]) {
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61 return 0;
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62 }
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63 }
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64 return 1;
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65 }
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66
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67 int
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68 free_register_count(void)
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69 {
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70 int i,count;
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71 count = 0;
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72 for(i=0;i<MAX_REGISTER;i++) {
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73 if (! regs[i] && ! regv[i]) count++;
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74 }
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75 return count;
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76 }
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77
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78 void
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79 free_all_register(void)
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80 {
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81 int i;
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82 for(i=0;i<MAX_REGISTER;i++) {
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83 regs[i]=regv[i]=0;
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84 }
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85 creg = get_register();
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86 dreg = get_register();
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87 return;
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88 }
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89
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90 void
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91 use_register_var(int i) {
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92 regv[i]=1;
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93 }
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94
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77
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95 void
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96 set_register_var() {
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97 }
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98
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99 void
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79
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100 arg_register0(int args)
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77
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101 {
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102 NMTBL *n;
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103 if (args) {
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104 /* process in reverse order */
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79
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105 n = (NMTBL*)caddr(args);
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77
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106 if(n->sc==REGISTER) {
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107 if ((n->dsp = get_register_var()) <0) {
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108 error(-1); return;
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109 }
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110 use_register_var(n->dsp); /* it has now value in it */
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111 }
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79
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112 arg_register0(cadr(args));
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77
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113 }
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114 }
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115
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79
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116 void
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117 arg_register(NMTBL *fnptr)
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118 {
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119 arg_register0(fnptr->dsp);
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120 }
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121
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122
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61
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123 int creg_regvar = -1;
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124 static int creg_regvar_back;
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125 static int creg_back;
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126
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127 void
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128 creg_destroy() {
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129 creg_back = creg; creg_regvar_back = creg_regvar;
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130 if (creg_regvar>=0)
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131 creg = creg_regvar;
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132 creg_regvar=-1;
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133 }
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134
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135 void
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136 creg_un_destroy() {
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137 creg = creg_back; creg_regvar = creg_regvar_back;
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138 }
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139
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140 void
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141 register_usage(char *s)
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142 {
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143 int i;
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66
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144 if (chk) return;
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61
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145 printf("# %d: %s:",lineno,s);
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146 printf(" creg=%s dreg=%s ",register_name(creg,0),register_name(dreg,0));
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147 for(i=0;i<MAX_REGISTER;i++) {
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148 printf("%d",regs[i]);
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149 }
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150 printf(":");
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151 for(i=0;i<MAX_REGISTER;i++) {
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152 printf("%d",regv[i]);
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153 }
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154 #if 0
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155 printf(" regs_stack",register_name(creg,0),register_name(dreg,0));
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156 for(i=reg_sp;i>=0;i--) {
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157 if(reg_stack[i]>=0)
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158 printf(" %s",register_name(reg_stack[i],0));
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159 }
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160 #endif
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161 printf("\n");
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162 }
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163
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164 void
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165 gexpr_init(void)
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166 {
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167 while(reg_sp > 0) {
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168 free_register(reg_stack[--reg_sp]);
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169 }
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170 text_mode();
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171 gexpr_code_init();
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172 register_usage("gexpr_init");
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173 }
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174
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175
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176 void
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177 emit_init(void)
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178 {
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179 int i;
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180 for(i=0;i<MAX_REGISTER;i++) { regs[i]=0; regv[i]=0;rname[i]=i;}
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181 free_all_register();
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182 reg_sp = 0;
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183 text_mode();
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184 }
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185
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186 int
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187 virtual(int real)
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188 {
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189 int real_v,i;
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190 real_v = -1;
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191 for(i=0;i<MAX_REGISTER;i++) {
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192 if (rname[i]==real) {
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193 real_v=i;
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194 break;
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195 }
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196 }
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197 return real_v;
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198 }
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199
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200 int
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201 pop_register(void)
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202 { /* レジスタから値を取り出す */
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203 return reg_stack[--reg_sp];
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204 }
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205
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206 int
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207 stack_used(void) {
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208 return reg_stack[--reg_sp]<0;
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209 }
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210
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211 void
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212 emit_pop_free(int xreg)
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213 {
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214 if (xreg==dreg) {
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215 regv[dreg]=0;
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216 } else if (xreg!=-1) {
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217 free_register(xreg);
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218 }
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219 }
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220
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221 void
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222 gexpr(int e1)
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223 {
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66
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224 if (chk) return;
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61
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225 gexpr_init();
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226 #if 0
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227 if(lineno==2862) {
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228 g_expr(e1); /*break here*/
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229 return;
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230 }
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231 #endif
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232 g_expr(e1);
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233 }
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234
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235 int
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236 csvalue()
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237 {
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238 return rname[creg]; /* for switch value */
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239 }
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240
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241 void
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242 g_expr(int e1)
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243 {
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244 int e2,e3/*,e4*/;
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245 NMTBL *n;
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246
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247 e2 = cadr(e1);
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248 switch (car(e1)){
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249 case GVAR:
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250 code_gvar(e1);
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251 regv[creg]=1;
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252 return;
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253 case RGVAR:
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254 code_rgvar(e1);
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255 regv[creg]=1;
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256 return;
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257 case CRGVAR:
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258 code_crgvar(e1);
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259 regv[creg]=1;
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260 return;
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261 case LVAR:
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262 code_lvar(lvar(e2));
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263 regv[creg]=1;
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264 return;
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265 case REGISTER:
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266 /* this is of course redundant... */
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267 /* we can use rname for this? */
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268 /* or why not creg=e2? */
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269 code_register(e2);
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270 regv[creg]=1;
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271 return;
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272 case RLVAR:
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273 code_rlvar(lvar(e2));
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274 regv[creg]=1;
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275 return;
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276 case CRLVAR:
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277 code_crlvar(lvar(e2));
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278 regv[creg]=1;
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279 return;
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81
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280 case FRLVAR:
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281 code_frlvar(lvar(e2));
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282 regv[creg]=1;
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283 return;
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284 case FRGVAR:
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285 code_frgvar(lvar(e2));
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286 regv[creg]=1;
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287 return;
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288 case DRLVAR:
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289 code_drlvar(lvar(e2));
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290 regv[creg]=1;
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291 return;
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292 case DRGVAR:
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293 code_drgvar(lvar(e2));
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294 regv[creg]=1;
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295 return;
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61
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296 case FNAME:
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297 code_fname(((NMTBL *)(e2))->nm);
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298 regv[creg]=1;
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299 return;
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300 case CONST: /* 代入する値が0でも特別な処理はしない */
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301 code_const(e2);
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302 regv[creg]=1;
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303 return;
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81
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304 case DCONST:
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305 code_dconst(e2);
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306 regv[creg]=1;
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307 return;
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61
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308 case STRING:
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309 string(e1);
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310 regv[creg]=1;
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311 return;
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312 case FUNCTION:
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313 function(e1);
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314 regv[creg]=1;
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315 return;
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316 case CODE:
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317 jump(e2,caddr(e1));
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318 return;
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319 case INDIRECT:
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320 g_expr(e2);
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321 return;
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81
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322 case RINDIRECT: case CRINDIRECT:
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323 case DRINDIRECT: case FRINDIRECT:
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61
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324 rindirect(e1);
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325 return;
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326 case ADDRESS:
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327 g_expr(e2);
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328 return;
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329 case MINUS: /* レジスタに対し、neglを実行すれば実現可能 */
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330 g_expr(e2);
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331 code_neg();
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332 return;
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81
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333 case DMINUS:
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334 g_expr(e2);
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335 code_dneg();
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336 return;
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61
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337 case BNOT: /* ~ */
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338 g_expr(e2);
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339 code_not();
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340 return;
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341 case LNOT: /* ! */
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342 g_expr(e2);
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343 code_lnot();
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344 return;
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345 case PREINC:
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346 code_preinc(e1,e2);
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347 return;
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348 case POSTINC:
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349 code_postinc(e1,e2);
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350 return;
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351 case CPOSTINC:
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352 /* char *p; *p++ */
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353 code_cpostinc(e1,e2);
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354 return;
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355 case CPREINC:
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356 code_cpreinc(e1,e2);
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357 return;
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358 case CPOSTDEC:
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359 code_cpostdec(e1,e2);
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360 return;
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361 case CPREDEC:
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362 code_cpredec(e1,e2);
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363 return;
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364 case MUL: case UMUL:
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365 case DIV: case UDIV:
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366 case MOD: case UMOD:
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367 case LSHIFT: case ULSHIFT: case RSHIFT: case URSHIFT:
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368 case ADD: case SUB: case BAND: case EOR: case BOR:
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369 machinop(e1);
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370 return;
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81
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371 case DMUL: case DDIV:
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372 case DADD: case DSUB:
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373 dmachinop(e1);
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374 return;
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61
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375 case COND:
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376 e2=fwdlabel();
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377 b_expr(cadr(e1),0,e2,0);
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378 code_set_fixed_creg(0);
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379 g_expr(caddr(e1));
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380 /* e4 = rname[creg]; this is a bad idea */
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381 code_set_fixed_creg(1);
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382 jmp(e3=fwdlabel());
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383 fwddef(e2);
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384 code_set_fixed_creg(0);
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385 g_expr(cadddr(e1));
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386 code_set_fixed_creg(1);
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387 fwddef(e3);
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388 return;
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389 case SASS:
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390 sassign(e1);
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391 return;
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81
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392 case ASS: case CASS: case FASS:
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61
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393 assign(e1);
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394 return;
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81
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395 case DASS: case LASS:
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396 dassign(e1);
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397 return;
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61
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398 case ASSOP: case CASSOP:
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399 assop(e1);
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400 return;
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81
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401 case DASSOP: case FASSOP:
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402 dassop(e1);
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403 return;
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61
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404 case RSTRUCT:
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405 g_expr(e2);
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406 return;
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407 case COMMA:
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408 g_expr(e2);
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409 g_expr(caddr(e1));
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410 return;
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411 case RETURN:
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412 n = (NMTBL *)e2;
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413 if (retcont==0)
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414 retcont=fwdlabel();
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415 code_return(creg);
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416 regv[creg]=1;
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417 return;
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418 case ENVIRONMENT:
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419 code_environment(creg);
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420 regv[creg]=1;
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421 return;
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422 default:
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423 code_bool(e1);
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424 regv[creg]=1;
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425 }
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426 }
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427
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428 void
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429 bexpr(int e1, char cond, int l1)
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430 {
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66
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431 if (chk) return;
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61
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432 gexpr_init();
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433 b_expr(e1,cond,l1,0);
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434 }
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435
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436 void
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437 b_expr(int e1, char cond, int l1,int err)
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438 {
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439 int e2,l2;
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440 e2=cadr(e1);
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441 switch(car(e1)) {
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442 case LNOT:
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443 b_expr(e2,!cond,l1,0);
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444 return;
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445 case GT:
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446 rexpr(e1,l1,code_gt(cond));
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447 return;
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|
448 case UGT:
|
|
|
449 rexpr(e1,l1,code_ugt(cond));
|
|
|
450 return;
|
|
|
451 case GE:
|
|
|
452 rexpr(e1,l1,code_ge(cond));
|
|
|
453 return;
|
|
|
454 case UGE:
|
|
|
455 rexpr(e1,l1,code_uge(cond));
|
|
|
456 return;
|
|
|
457 case LT:
|
|
|
458 rexpr(e1,l1,code_ge(!cond));
|
|
|
459 return;
|
|
|
460 case ULT:
|
|
|
461 rexpr(e1,l1,code_uge(!cond));
|
|
|
462 return;
|
|
|
463 case LE:
|
|
|
464 rexpr(e1,l1,code_gt(!cond));
|
|
|
465 return;
|
|
|
466 case ULE:
|
|
|
467 rexpr(e1,l1,code_ugt(!cond));
|
|
|
468 return;
|
|
|
469 case EQ:
|
|
|
470 rexpr(e1,l1,code_eq(cond));
|
|
|
471 return;
|
|
|
472 case NEQ:
|
|
|
473 rexpr(e1,l1,code_eq(!cond));
|
|
|
474 return;
|
|
|
475 case LAND:
|
|
|
476 b_expr(e2,0,cond?(l2=fwdlabel()):l1,0);
|
|
|
477 b_expr(caddr(e1),cond,l1,0);
|
|
|
478 if(cond) fwddef(l2);
|
|
|
479 return;
|
|
|
480 case LOR:
|
|
|
481 b_expr(e2,1,cond?l1:(l2=fwdlabel()),0);
|
|
|
482 b_expr(caddr(e1),cond,l1,0);
|
|
|
483 if(!cond) fwddef(l2);
|
|
|
484 return;
|
|
|
485 case CRGVAR:
|
|
|
486 code_cmp_crgvar(e1);
|
|
|
487 jcond(l1,cond);
|
|
|
488 return;
|
|
|
489 case CRLVAR:
|
|
|
490 code_cmp_crlvar(lvar(e2));
|
|
|
491 jcond(l1,cond);
|
|
|
492 return;
|
|
|
493 case RGVAR:
|
|
|
494 code_cmp_rgvar(e1);
|
|
|
495 jcond(l1,cond);
|
|
|
496 return;
|
|
|
497 case RLVAR:
|
|
|
498 code_cmp_rlvar(lvar(e2));
|
|
|
499 jcond(l1,cond);
|
|
|
500 return;
|
|
81
|
501 case DRLVAR:
|
|
|
502 code_cmp_drlvar(lvar(e2));
|
|
|
503 jcond(l1,cond);
|
|
|
504 return;
|
|
|
505 case DRGVAR:
|
|
|
506 code_cmp_drgvar(lvar(e2));
|
|
|
507 jcond(l1,cond);
|
|
|
508 return;
|
|
61
|
509 case REGISTER:
|
|
|
510 code_cmp_register(e2);
|
|
|
511 jcond(l1,cond);
|
|
|
512 return;
|
|
|
513 case CONST:
|
|
|
514 if((cond&&e2)||(!cond&&!e2)) jmp(l1);
|
|
|
515 return;
|
|
81
|
516 case DCONST:
|
|
|
517 if((dcadr(e2)!=0.0)^cond) jmp(l1);
|
|
|
518 return;
|
|
61
|
519 default:
|
|
81
|
520 /* type ? */
|
|
61
|
521 if(err) {
|
|
81
|
522 error(-1); return; /* recursive g_expr/b_expr */
|
|
61
|
523 }
|
|
|
524 g_expr(e1);
|
|
|
525 code_cmp_register(creg);
|
|
|
526 jcond(l1,cond);
|
|
|
527 return;
|
|
|
528 }
|
|
|
529 }
|
|
|
530
|
|
|
531
|
|
|
532 /* goto arguments list */
|
|
|
533 /* target list4(list2(tag,disp),cdr,ty,source_expr) */
|
|
|
534 /* source expr=listn(tag,...) */
|
|
|
535 /* source (after) list2(tag,disp) */
|
|
|
536 /* source list list3(e,cdr,sz) */
|
|
|
537
|
|
|
538 #define DEBUG_PARALLEL_ASSIGN 1
|
|
|
539
|
|
|
540 int
|
|
|
541 overrap(int t,int sz,int source)
|
|
|
542 {
|
|
|
543 int s,s0,s1;
|
|
|
544 int t0=cadr(t);
|
|
|
545 int t1=t0+sz;
|
|
|
546 for(;source;source=cadr(source)) {
|
|
|
547 s=car(source); s0=cadr(s);
|
|
|
548 if(car(s)==REGISTER && car(t)==REGISTER) {
|
|
|
549 if(s0==t0) return s;
|
|
|
550 } else if (is_same_type(s,t)) {
|
|
|
551 s1=s0+caddr(source);
|
|
|
552 #if DEBUG_PARALLEL_ASSIGN>1
|
|
|
553 printf("# ovedrrap source %d t0 %d t1 %d\n",car(car(t)),t0,t1);
|
|
|
554 printf("# ovedrrap target %d s0 %d s1 %d\n",car(car(source)),s0,s1);
|
|
|
555 printf("# ovedrrap equal = %d\n",((t0<=s0&&s0<t1)||(t0<s1&&s1<=t1)));
|
|
|
556 #endif
|
|
|
557 if((t0<=s0&&s0<t1)||(t0<s1&&s1<=t1)) return s;
|
|
|
558 }
|
|
|
559 }
|
|
|
560 return 0;
|
|
|
561 }
|
|
|
562
|
|
|
563 void
|
|
|
564 remove_target(int *target,int t,int *use)
|
|
|
565 {
|
|
|
566 int use0=*use;
|
|
|
567 while(use0) {
|
|
|
568 if (car(use0)==t) {
|
|
|
569 free_register(caddr(use0));
|
|
|
570 break;
|
|
|
571 }
|
|
|
572 use0 = cadr(use0);
|
|
|
573 }
|
|
|
574 remove0(target,t);
|
|
|
575 }
|
|
|
576
|
|
|
577 void
|
|
|
578 save_target(int t,int s,int *target,int *use,int sz,int ty)
|
|
|
579 {
|
|
|
580 int e1;
|
|
|
581 /*新しいレジスタ(or スタック)を取得する*/
|
|
|
582 if (sz==size_of_int && (e1=get_register())!=-1) {
|
|
|
583 *use=list3(t,*use,e1);
|
|
|
584 e1=list2(REGISTER,e1);
|
|
|
585 g_expr(assign_expr0(e1,s,ty,ty));
|
|
|
586 *target = append4(*target,t,ty,e1);
|
|
|
587 } else {
|
|
|
588 disp-=sz;
|
|
|
589 g_expr(assign_expr0((e1=list2(LVAR,disp)),s,ty,ty));
|
|
|
590 *target = append4(*target,t,ty,e1);
|
|
|
591 }
|
|
|
592 }
|
|
|
593
|
|
|
594 int
|
|
|
595 circular_dependency(int t,int s,int *target,int *source)
|
|
|
596 {
|
|
|
597 int target0=*target;
|
|
|
598 int t1,sz,ty,s1;
|
|
|
599 while(target0) {
|
|
|
600 if (cadddr(target0)==s) {
|
|
|
601 t1=car(target0);
|
|
|
602 s=cadddr(target0);
|
|
|
603 sz=size(ty=caddr(target0));
|
|
|
604 if(t==t1) {
|
|
|
605 #if DEBUG_PARALLEL_ASSIGN
|
|
|
606 printf("# circular dependency %d ty %d+%d sz %d\n",car(t1),ty,cadr(t1),sz);
|
|
|
607 #endif
|
|
|
608 return 1;
|
|
|
609 }
|
|
|
610 if ((s1=overrap(t1,sz,*source))) {
|
|
|
611 /* another overrap start over */
|
|
|
612 return circular_dependency(t,s1,target,source);
|
|
|
613 }
|
|
|
614 }
|
|
|
615 target0=cadr(target0);
|
|
|
616 }
|
|
|
617 return 0;
|
|
|
618 }
|
|
|
619
|
|
|
620 void
|
|
|
621 parallel_assign(int *target,int *source,int *processing,int *use)
|
|
|
622 {
|
|
|
623 int t,s,sz,ty,target0,s1;
|
|
|
624 while(*target) {
|
|
|
625 target0=*target;
|
|
|
626 while(target0) {
|
|
|
627 t=car(target0); s=cadddr(target0);
|
|
|
628 sz=size(ty=caddr(target0));
|
|
|
629 if(car(t)==car(s) && cadr(t)==cadr(s)) {
|
|
|
630 /*書き込み先が自分自身*/
|
|
|
631 #if DEBUG_PARALLEL_ASSIGN
|
|
|
632 printf("# remove same %d ty %d+%d sz %d\n",car(t),ty,cadr(t),sz);
|
|
|
633 #endif
|
|
|
634 remove_target(target,t,use);
|
|
|
635 /* 破壊されては困るので、source listからは除かない */
|
|
|
636 } else if (!(s1=overrap(t,sz,*source))) {
|
|
|
637 /* 重なってないので安心して書き込める */
|
|
|
638 #if DEBUG_PARALLEL_ASSIGN
|
|
|
639 printf("# normal assign %d ty %d+%d sz %d\n",car(t),ty,cadr(t),sz);
|
|
|
640 #endif
|
|
|
641 g_expr(assign_expr0(t,s,ty,ty));
|
|
|
642 remove_target(target,t,use); remove0(source,s);
|
|
|
643 } else {
|
|
|
644 if(circular_dependency(t,s1,target,source)) {
|
|
|
645 #if DEBUG_PARALLEL_ASSIGN
|
|
|
646 printf("# saving %d ty %d+%d sz %d\n",car(t),ty,cadr(t),sz);
|
|
|
647 #endif
|
|
|
648 remove_target(target,t,use); remove0(source,s);
|
|
|
649 save_target(t,s,target,use,sz,ty);
|
|
|
650 }
|
|
|
651 }
|
|
|
652 target0=cadr(target0);
|
|
|
653 }
|
|
|
654 }
|
|
|
655 }
|
|
|
656
|
|
|
657 void
|
|
|
658 remove0(int *parent,int e)
|
|
|
659 {
|
|
|
660 int list;
|
|
|
661 while ((list=*parent)) {
|
|
|
662 if (car(list)==e) {
|
|
|
663 *parent= cadr(list); return;
|
|
|
664 } else {
|
|
|
665 parent=&cadr(list);
|
|
|
666 }
|
|
|
667 }
|
|
|
668 }
|
|
|
669
|
|
|
670 void
|
|
|
671 remove0_all(int *parent,int e)
|
|
|
672 {
|
|
|
673 int list;
|
|
|
674 while ((list=*parent)) {
|
|
|
675 if (car(list)==e) {
|
|
|
676 *parent= cadr(list);
|
|
|
677 } else {
|
|
|
678 parent=&cadr(list);
|
|
|
679 }
|
|
|
680 }
|
|
|
681 }
|
|
|
682
|
|
|
683 int
|
|
|
684 is_simple(int e1)
|
|
|
685 {
|
|
|
686 return (
|
|
|
687 e1==CONST || e1==FNAME || e1==LVAR || e1==REGISTER ||
|
|
81
|
688 e1==GVAR || e1==RGVAR || e1==RLVAR || e1==CRLVAR || e1==CRGVAR ||
|
|
|
689 e1==DRLVAR || e1==FRLVAR
|
|
61
|
690 );
|
|
|
691 }
|
|
|
692
|
|
|
693 int
|
|
|
694 is_same_type(int e1,int e2)
|
|
|
695 {
|
|
|
696 int ce1=car(e1);
|
|
|
697 int ce2=car(e2);
|
|
|
698 return (
|
|
81
|
699 (ce1==LVAR && (ce2==RLVAR||ce2==CRLVAR||ce2==FRLVAR||ce2==DRLVAR))
|
|
|
700 || (ce2==LVAR && (ce1==RLVAR||ce1==CRLVAR||ce1==FRLVAR||ce1==DRLVAR))
|
|
|
701 || (ce1==GVAR && (ce2==RGVAR||ce2==CRGVAR||ce2==FRGVAR||ce2==DRGVAR))
|
|
|
702 || (ce2==GVAR && (ce1==RGVAR||ce1==CRGVAR||ce1==FRGVAR||ce1==DRGVAR))
|
|
61
|
703 );
|
|
|
704 }
|
|
|
705
|
|
|
706 int
|
|
|
707 is_memory(int e1)
|
|
|
708 {
|
|
|
709 int ce1=car(e1);
|
|
|
710 return (
|
|
81
|
711 ce1==LVAR ||ce1==RLVAR||ce1==CRLVAR || ce1==DRLVAR ||
|
|
|
712 ce1==GVAR ||ce1==RGVAR||ce1==CRGVAR || ce1==DRGVAR ||
|
|
61
|
713 ce1==REGISTER
|
|
|
714 );
|
|
|
715 }
|
|
|
716
|
|
|
717 void
|
|
|
718 jump(int e1, int env)
|
|
|
719 {
|
|
|
720 int e2,e3,e4,sz,arg_size,ty,max_regs,regs;
|
|
|
721 int t0,s0;
|
|
|
722 NMTBL *code0;
|
|
|
723 int target = 0;
|
|
|
724 int source = 0;
|
|
|
725 int processing = 0;
|
|
|
726 int use = 0;
|
|
|
727
|
|
|
728 /* まず、サイズを計算しながら、決まった形に落す。 */
|
|
|
729
|
|
|
730 arg_size = 0; regs = 0; max_regs = MAX_REGISTER_VAR-1;
|
|
|
731 for (e3 = reverse0(caddr(e1)); e3; e3 = cadr(e3)) {
|
|
|
732 e2 = car(e3); sz = size(ty=caddr(e3));
|
|
80
|
733 if (regs <= max_regs&&sz==size_of_int) {
|
|
61
|
734 target=list4(list2(REGISTER,register_var(regs++)), target,ty,e2);
|
|
|
735 } else {
|
|
|
736 target=list4(list2(LVAR,0), target,ty,e2);
|
|
|
737 arg_size += sz;
|
|
|
738 }
|
|
|
739 #if DEBUG_PARALLEL_ASSIGN
|
|
|
740 printf("# target %d ty %d+%d sz %d\n",car(car(target)),ty,cadr(car(target)),sz);
|
|
|
741 #endif
|
|
|
742 }
|
|
|
743
|
|
|
744 /* disp を飛び先似合わせて修正 */
|
|
|
745 if (fnptr->sc==CODE) {
|
|
|
746 if (-arg_size<disp) disp = -arg_size;
|
|
|
747 } else {
|
|
|
748 if (disp_offset-arg_size<disp) disp = disp_offset-arg_size;
|
|
|
749 }
|
|
|
750
|
|
|
751 /* 複雑な式を前もって計算しておく */
|
|
|
752 /* 必要なら局所変数を用いる。 */
|
|
|
753 /* 局所変数へのオフセットを覚えておく */
|
|
|
754
|
|
|
755 for (e2 = target; e2; e2 = cadr(e2)) {
|
|
|
756 t0=car(e2); s0=cadddr(e2);
|
|
|
757 sz=size(ty=caddr(e2));
|
|
|
758 if(car(t0)==LVAR) {
|
|
|
759 /* ここで、書込先アドレスを決める */
|
|
|
760 cadr(t0)=-arg_size;
|
|
|
761 arg_size-=sz;
|
|
|
762 }
|
|
|
763 if (!is_simple(car(s0))) {
|
|
|
764 disp-=sz;
|
|
|
765 g_expr(assign_expr0((e4=list2(LVAR,disp)),s0,ty,ty));
|
|
|
766 cadddr(e2)=e4;
|
|
|
767 s0=e4;
|
|
|
768 } else if (is_same_type(t0,s0)) {
|
|
|
769 if(cadr(t0)==cadr(s0)) {
|
|
|
770 #if DEBUG_PARALLEL_ASSIGN
|
|
|
771 printf("# remove same memory %d ty %d+%d sz %d\n",car(t0),ty,cadr(t0),sz);
|
|
|
772 #endif
|
|
|
773 /* we should check size also (but currently useless */
|
|
|
774 remove0(&target,t0);
|
|
|
775 /* still we have source to avoid overwrite */
|
|
|
776 }
|
|
|
777 }
|
|
|
778 if(is_memory(s0)) {
|
|
|
779 source=list3(s0,source,sz);
|
|
|
780 #if DEBUG_PARALLEL_ASSIGN
|
|
|
781 printf("# source %d ty %d+%d sz %d\n",car(car(source)),ty,cadr(car(source)),sz);
|
|
|
782 #endif
|
|
|
783 }
|
|
|
784 }
|
|
|
785
|
|
|
786 /* compute jump address */
|
|
|
787 e2 = cadr(e1);
|
|
|
788 if (car(e2) == FNAME) {
|
|
|
789 code0=(NMTBL *)cadr(e2);
|
|
|
790 if (code0->sc!=CODE) {
|
|
|
791 error(TYERR); return;
|
|
|
792 }
|
|
|
793 } else { /* indirect */
|
|
|
794 g_expr(e2);
|
|
|
795 emit_push();
|
|
|
796 }
|
|
|
797 if (env) {
|
|
|
798 g_expr(env);
|
|
|
799 emit_push();
|
|
|
800 }
|
|
|
801
|
|
|
802 /* 並列代入を実行 */
|
|
|
803
|
|
|
804 parallel_assign(&target,&source,&processing,&use);
|
|
|
805 while (use) {
|
|
|
806 free_register(caddr(use)); use=cadr(use);
|
|
|
807 }
|
|
|
808 if(target) error(-1);
|
|
|
809
|
|
|
810 if (env) {
|
|
|
811 /* change the frame pointer */
|
|
|
812 e3 = emit_pop(0);
|
|
|
813 code_frame_pointer(e3);
|
|
|
814 emit_pop_free(e3);
|
|
|
815 } else if (fnptr->sc==FUNCTION) {
|
|
|
816 code_fix_frame_pointer(disp_offset);
|
|
|
817 }
|
|
|
818
|
|
|
819 if (car(e2) == FNAME) {
|
|
|
820 code_jmp(code0->nm);
|
|
|
821 } else {
|
|
|
822 e2 = emit_pop(0);
|
|
|
823 code_indirect_jmp(e2);
|
|
|
824 emit_pop_free(e2);
|
|
|
825 }
|
|
|
826 }
|
|
|
827
|
|
|
828 void
|
|
|
829 machinop(int e1)
|
|
|
830 {
|
|
|
831 int e2,e3,op;
|
|
|
832
|
|
|
833 e2 = cadr(e1);
|
|
|
834 op = car(e1);
|
|
|
835 e3 = caddr(e1);
|
|
|
836 g_expr(e3);
|
|
|
837 emit_push();
|
|
|
838 g_expr(e2);
|
|
|
839 tosop(car(e1),(e2=pop_register()));
|
|
|
840 emit_pop_free(e2);
|
|
|
841 regv[creg]=1;
|
|
|
842 return;
|
|
|
843 }
|
|
|
844
|
|
81
|
845 void
|
|
|
846 dmachinop(int e1)
|
|
|
847 {
|
|
|
848 int e2,e3,op;
|
|
|
849
|
|
|
850 e2 = cadr(e1);
|
|
|
851 op = car(e1);
|
|
|
852 e3 = caddr(e1);
|
|
|
853 g_expr(e3);
|
|
|
854 emit_dpush();
|
|
|
855 g_expr(e2);
|
|
|
856 dtosop(car(e1),(e2=dpop_register()));
|
|
|
857 emit_dpop_free(e2);
|
|
|
858 regv[freg]=1;
|
|
|
859 return;
|
|
|
860 }
|
|
|
861
|
|
61
|
862
|
|
|
863 void
|
|
|
864 sassign(int e1)
|
|
|
865 {
|
|
|
866 int e2,e3,e4,sz,xreg,det;
|
|
|
867
|
|
|
868 /* structure assignment */
|
|
|
869 e2 = cadr(e1); /* pointer variable to the struct */
|
|
|
870 e3 = cadr(e2); /* offset of the variable (distination) */
|
|
|
871 e4 = caddr(e1); /* right value (source) */
|
|
|
872 sz = cadddr(e1); /* size of struct or union */
|
|
|
873 g_expr(e4);
|
|
|
874 emit_push();
|
|
|
875 g_expr(e2);
|
|
|
876 xreg = emit_pop(0);
|
|
|
877 /* 一般的にはコピーのオーバラップの状況は実行時にしかわからない */
|
|
|
878 /* しかし、わかる場合もある */
|
|
|
879 if (car(e4)==RSTRUCT) e4=cadr(e4);
|
|
|
880 if (is_same_type(e2,e4)) {
|
|
|
881 if(cadr(e2)<cadr(e4)) sz=-sz;
|
|
|
882 det=1;
|
|
|
883 } else {
|
|
|
884 det = 0;
|
|
|
885 }
|
|
|
886 emit_copy(xreg,creg,sz,0,1,det);
|
|
|
887 emit_pop_free(xreg);
|
|
|
888 return;
|
|
|
889 }
|
|
|
890
|
|
|
891 void
|
|
|
892 assign(int e1)
|
|
|
893 {
|
|
|
894 int e2,e3,e4,byte;
|
|
|
895
|
|
|
896 byte=(car(e1) == CASS);
|
|
81
|
897 if(car(e1) == FASS) {
|
|
|
898 /* move float to creg */
|
|
|
899 }
|
|
61
|
900 /* e2=e4 */
|
|
|
901 e2 = cadr(e1);
|
|
|
902 e3 = cadr(e2);
|
|
|
903 e4 = caddr(e1);
|
|
|
904 switch(car(e2)) {
|
|
|
905 case GVAR: /* i=3 */
|
|
|
906 g_expr(e4);
|
|
|
907 code_assign_gvar(e2,byte);
|
|
|
908 return;
|
|
|
909 case LVAR:
|
|
|
910 g_expr(e4);
|
|
|
911 code_assign_lvar(lvar(cadr(e2)),byte);
|
|
|
912 return;
|
|
|
913 case REGISTER:
|
|
|
914 g_expr(e4);
|
|
|
915 if (creg!=cadr(e2))
|
|
|
916 code_assign_register(cadr(e2),byte);
|
|
|
917 return;
|
|
|
918 }
|
|
|
919 g_expr(e2);
|
|
|
920 emit_push();
|
|
|
921 use_data_reg(creg,0);
|
|
|
922 g_expr(e4);
|
|
|
923 if (byte) use_data_reg(creg,1);
|
|
|
924 e2 = emit_pop(0);
|
|
|
925 code_assign(e2,byte);
|
|
|
926 emit_pop_free(e2);
|
|
|
927 regv[creg]=1;
|
|
|
928 return;
|
|
|
929 }
|
|
|
930
|
|
|
931 void
|
|
81
|
932 dassign(int e1)
|
|
|
933 {
|
|
|
934 int e2,e3,e4,byte;
|
|
|
935
|
|
|
936 /* e2=e4 */
|
|
|
937 e2 = cadr(e1);
|
|
|
938 e3 = cadr(e2);
|
|
|
939 e4 = caddr(e1);
|
|
|
940 switch(car(e2)) {
|
|
|
941 case GVAR: /* i=3 */
|
|
|
942 g_expr(e4);
|
|
|
943 code_dassign_gvar(e2,byte);
|
|
|
944 return;
|
|
|
945 case LVAR:
|
|
|
946 g_expr(e4);
|
|
|
947 code_dassign_lvar(lvar(cadr(e2)),byte);
|
|
|
948 return;
|
|
|
949 }
|
|
|
950 g_expr(e2);
|
|
|
951 emit_dpush();
|
|
|
952 g_expr(e4);
|
|
|
953 e2 = emit_dpop(0);
|
|
|
954 code_dassign(e2,byte);
|
|
|
955 emit_dpop_free(e2);
|
|
|
956 return;
|
|
|
957 }
|
|
|
958
|
|
|
959 void
|
|
61
|
960 assop(int e1)
|
|
|
961 {
|
|
|
962 int e2,e3,byte,op;
|
|
|
963
|
|
|
964 /* e2 op= e3 */
|
|
|
965 byte = (car(e1) == CASSOP);
|
|
|
966 e2 = cadr(e1);
|
|
|
967 if (car(e2)==INDIRECT) e2=cadr(e2);
|
|
|
968 e3 = caddr(e1);
|
|
|
969 op = cadddr(e1);
|
|
|
970
|
|
|
971 g_expr(e3);
|
|
|
972 if (car(e2)==REGISTER) {
|
|
|
973 code_register_assop(cadr(e2),op,byte);
|
|
|
974 regv[creg]=1;
|
|
|
975 return;
|
|
|
976 }
|
|
|
977 emit_push();
|
|
|
978 g_expr(e2);
|
|
|
979 code_assop(op,byte);
|
|
|
980 regv[creg]=1;
|
|
|
981 return;
|
|
|
982 }
|
|
|
983
|
|
81
|
984 void
|
|
|
985 dassop(int e1)
|
|
|
986 {
|
|
|
987 }
|
|
|
988
|
|
|
989 void
|
|
|
990 fassop(int e1)
|
|
|
991 {
|
|
|
992 }
|
|
61
|
993
|
|
|
994 int
|
|
|
995 fwdlabel(void)
|
|
|
996 {
|
|
|
997 return labelno++;
|
|
|
998 }
|
|
|
999
|
|
|
1000 void
|
|
|
1001 fwddef(int l)
|
|
|
1002 {
|
|
|
1003 control=1;
|
|
66
|
1004 if (!chk)
|
|
|
1005 printf("_%d:\n",l);
|
|
61
|
1006 }
|
|
|
1007
|
|
|
1008 int
|
|
|
1009 backdef(void)
|
|
|
1010 {
|
|
|
1011 control=1;
|
|
66
|
1012 if (!chk)
|
|
|
1013 printf("_%d:\n",labelno);
|
|
61
|
1014 return labelno++;
|
|
|
1015 }
|
|
|
1016
|
|
|
1017 void
|
|
|
1018 def_label(int cslabel, int dlabel)
|
|
|
1019 {
|
|
|
1020 int fl;
|
|
|
1021
|
|
|
1022 fl = 0;
|
|
|
1023 if (control) {
|
|
|
1024 jmp(fl=fwdlabel());
|
|
|
1025 }
|
|
|
1026 fwddef(cslabel);
|
|
|
1027 if (dlabel)
|
|
|
1028 jmp(dlabel);
|
|
|
1029 if (fl) {
|
|
|
1030 fwddef(fl);
|
|
|
1031 }
|
|
|
1032 }
|
|
|
1033
|
|
|
1034 void
|
|
|
1035 gen_source(char *s)
|
|
|
1036 {
|
|
|
1037 printf("%s",s);
|
|
|
1038 }
|
|
|
1039
|
|
|
1040 void
|
|
|
1041 ret(void)
|
|
|
1042 {
|
|
|
1043 code_set_fixed_creg(1);
|
|
|
1044 jmp(retlabel);
|
|
|
1045 }
|
|
|
1046
|
|
66
|
1047 void
|
|
|
1048 opening(char *filename)
|
|
|
1049 {
|
|
|
1050 emit_init();
|
|
|
1051 if (!chk)
|
|
|
1052 code_opening(filename);
|
|
|
1053 }
|
|
|
1054
|
|
|
1055 void
|
|
|
1056 closing()
|
|
|
1057 {
|
|
|
1058 if (!chk)
|
|
|
1059 code_closing();
|
|
|
1060 }
|
|
|
1061
|
|
61
|
1062 /* end */
|
