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51
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1 /* Micro-C Code Generatation Part for Mips */
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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(void);
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9 void free_register(int i);
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10 void emit_init(void);
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11 void emit_push(void);
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12 void gexpr(int e1);
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13 void g_expr(int e1);
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14 void bexpr(int e1, char cond, int l1);
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15 void b_expr(int e1, char cond, int l1);
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16 void string(int e1);
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17 void function(int e1);
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18 void machinop(int e1);
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19 void rindirect(int e1);
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20 void assign(int e1);
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21 void sassign(int e1);
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22 void assop(int e1);
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23 void tosop(int op);
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24 void shift(char *op, int reg) ;
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25 void ld_indexx(int byte, int n, char *xrn);
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26 void st_indexx(int byte, int n, char *xrn);
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27 void indexy(char *op, char *gvar);
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28 void cmpdimm(int e, int csreg);
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29 void global_table(void) ;
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30 void local_table(void) ;
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31 void opening(char *filename);
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32 void closing(void);
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33 void gen_gdecl(char *n, int gpc) ;
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34 void jmp_label(int l);
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35 void jmp_eq_label(int l);
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36 void rexpr(int e1, int l1, char *s);
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37 void jcond(int l, char cond);
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38 void jmp(int l);
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39 void def_label(int cslabel, int dlabel) ;
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40 void gen_comment(char *s);
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41 void gen_source(char *s);
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42 void code_enter(char *name) ;
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43 void code_leave(char *name) ;
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44 void enter(char *name, int disp) ;
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45 void enter_no(char *name,int disp);
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46 void enter1(int disp) ;
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47 void ret(void);
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48 void emit_data(int e, int t, NMTBL *n);
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49 void text_mode(void);
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50 void data_mode(char *name);
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51 int get_register_var(void);
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52 void jump(int e1, int env);
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53 int lvar(int l);
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54
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55 int cadr(int e);
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56 int car(int e);
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57 int caddr(int e);
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58 int fwdlabel(void);
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59 void fwddef(int l);
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60 int cadddr(int e);
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61 int backdef(void);
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62 int error(int n);
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63 int size(int t);
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64 int list3(int e1, int e2, int e3);
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65 extern int scalar(int);
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66 extern int reverse0(int);
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67
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68 #define TEXT_EMIT_MODE 0
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69 #define DATA_EMIT_MODE 1
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70 #define RODATA_EMIT_MODE 2
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71
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72 static output_mode = TEXT_EMIT_MODE;
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73 static data_alignment = 0;
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74
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75 /*
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76 local1 <----24 local variable
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77 -20 <- disp_offset
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78 saved register
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79 .mask 0...0,-8
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80 .fmask 0
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81 $fp = $sp 0
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82 $ip 4 <- arg_offset
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83 arg1 8
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84 */
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85 int arg_offset = 8;
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86 int code_arg_offset = -4;
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87 int disp_offset = -12;
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88 int func_disp_offset = -12;
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89 int code_disp_offset = -4;
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90 int size_of_int = 4;
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91 int endian = 0;
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92 int MAX_REGISTER=32; /* Mipsのレジスタを32つまで使う*/
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93 int REAL_MAX_REGISTER=32; /* Mipsのレジスタが32つということ*/
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94 int MAX_REGISTGER_VAR=20;
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95
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96 int save_reg = 0; /*saveされたレジスタの回数*/
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97 int save_reg1 = 0;
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98
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99 static int creg; /* current register */
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100 static char *crn; /* current register name */
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101 static int lreg; /* operand register */
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102 static char *lrn; /* operand register name */
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103 static int dreg; /* temporary register */
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104 static char *drn; /* temporary register name */
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105 static int xreg; /* pointer register */
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106 static int reg_sp; /* REGister Stack-Pointer */
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107
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108
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109 #define REG_00 0
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110 #define REG_01 1
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111 #define REG_02 2
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112 #define REG_03 3
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113 #define REG_04 4
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114 #define REG_05 5
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115 #define REG_06 6
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116 #define REG_07 7
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117 #define REG_08 8
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118 #define REG_09 9
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119 #define REG_10 10
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120 #define REG_11 11
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121 #define REG_12 12
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122 #define REG_13 13
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123 #define REG_14 14
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124 #define REG_15 15
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125 #define REG_16 16
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126 #define REG_17 17
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127 #define REG_18 18
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128 #define REG_19 19
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129 #define REG_20 20
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130 #define REG_21 21
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131 #define REG_22 22
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132 #define REG_23 23
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133 #define REG_24 24
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134 #define REG_25 25
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135 #define REG_26 26
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136 #define REG_27 27
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137 #define REG_28 28
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138 #define REG_29 29
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139 #define REG_30 30
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140 #define REG_31 31
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141
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142 static char *reg_name[32];
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143
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144 /*
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145 creg currrent virtual register
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146 lreg operand virtual register
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147 dreg spare virtual register
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148
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149 rname[creg] currrent real register
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150 rname[lreg] operand real register
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151 rname[dreg] spare real register
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152
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153 regs[] virtual register usage
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154
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155 reg_name[rname[creg]]
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156 */
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157
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158 #define MAX_MAX 40
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159 static int rname[MAX_MAX];
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160 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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161 static int reg_stack[MAX_MAX]; /* 実際のレジスタの領域 */
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162
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163 void
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164 code_init(void)
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165 {
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166 int i;
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167
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168 if (REGISTERS6) {
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169 arg_offset = 8;
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170 func_disp_offset = -20;
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171 disp_offset = -20;
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172 size_of_int = 4;
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173 endian = 0;
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174 MAX_REGISTER=32;
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175 } else {
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176 arg_offset = 8;
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177 func_disp_offset = -12;
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178 disp_offset = -12;
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179 size_of_int = 4;
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180 endian = 0;
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181 MAX_REGISTER=32;
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182 }
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183 MAX_REGISTER_VAR=2;
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184
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185 reg_name[REG_00] = "$0";
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186 reg_name[REG_01] = "$1";
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187 reg_name[REG_02] = "$2";
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188 reg_name[REG_03] = "$3";
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189 reg_name[REG_04] = "$4";
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190 reg_name[REG_05] = "$5";
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191 reg_name[REG_06] = "$6";
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192 reg_name[REG_07] = "$7";
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193 reg_name[REG_08] = "$8";
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194 reg_name[REG_09] = "$9";
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195 reg_name[REG_10] = "$10";
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196 reg_name[REG_11] = "$11";
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197 reg_name[REG_12] = "$12";
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198 reg_name[REG_13] = "$13";
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199 reg_name[REG_14] = "$14";
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200 reg_name[REG_15] = "$15";
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201 reg_name[REG_16] = "$16";
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202 reg_name[REG_17] = "$17";
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203 reg_name[REG_18] = "$18";
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204 reg_name[REG_19] = "$19";
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205 reg_name[REG_20] = "$20";
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206 reg_name[REG_21] = "$21";
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207 reg_name[REG_22] = "$22";
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208 reg_name[REG_23] = "$23";
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209 reg_name[REG_24] = "$24";
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210 reg_name[REG_25] = "$25";
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211 reg_name[REG_26] = "$26";
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212 reg_name[REG_27] = "$27";
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213 reg_name[REG_28] = "$28";
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214 reg_name[REG_29] = "$29";
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215 reg_name[REG_30] = "$30";
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216 reg_name[REG_31] = "$31";
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217
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218 }
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219
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220 char *
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221 register_name(int i)
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222 {
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223 return reg_name[rname[i]];
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224 }
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225
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226 int
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227 get_register(void)
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228 { /* 使われていないレジスタを調べる */
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229 int i;
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230 for(i=0;i<MAX_REGISTER;i++) {
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231 if (! regs[i]) { /* 使われていないなら */
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232 regs[i]=1; /* そのレジスタを使うことを宣言し */
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233 return i; /* その場所を表す番号を返す */
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234 }
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235 }
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236
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237 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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238 }
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239
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240 void
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241 free_register(int i) { /* いらなくなったレジスタを開放 */
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242 regs[i]=0;
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243 }
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244
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245 int
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246 register_full(void)
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247 {
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248 int i;
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249 for(i=0;i<MAX_REGISTER;i++) {
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250 if (! regs[i]) {
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251 return 0;
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252 }
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253 }
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254 return 1;
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255 }
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256
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257 void
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258 gexpr_init(void)
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259 {
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260 int i;
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261 while(reg_sp > 0) {
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262 free_register(reg_stack[--reg_sp]);
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263 }
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264 text_mode();
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265 }
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266
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267 void
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268 emit_init(void)
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269 {
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270 int i;
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271 for(i=0;i<REAL_MAX_REGISTER;i++) regs[i]=0;
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272 for(i=0;i<REAL_MAX_REGISTER;i++) rname[i]=i;
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273 regs[REG_00] = 1; /* reserved */
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274 regs[REG_01] = 1; /* reserved */
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275 regs[REG_02] = 1; /* $v0 */
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276 regs[REG_03] = 1; /* $v1 */
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277 regs[REG_28] = 1; /* reserved */
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278 regs[REG_29] = 1; /* reserved */
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279 regs[REG_30] = 1; /* reserved */
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280 regs[REG_31] = 1; /* reserved */
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281 creg = get_register();
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282 crn = reg_name[rname[creg]];
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283 dreg = get_register();
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284 drn = reg_name[rname[dreg]];
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285 reg_sp = 0;
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286 text_mode();
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287 }
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288
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289 void
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290 set_crn(int i)
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291 {
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292 creg = i;
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293 crn = reg_name[rname[creg]];
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294 }
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295
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296 void
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297 set_drn(int i)
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298 {
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299 dreg = i;
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300 drn = reg_name[rname[dreg]];
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301 }
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302
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303 int
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304 virtual(int real)
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305 {
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306 int real_v,i;
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307 real_v = -1;
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308 for(i=0;i<MAX_REGISTER;i++) {
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309 if (rname[i]==real) {
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310 real_v=i;
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311 break;
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312 }
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313 }
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314 if (real_v == -1)
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315 error(-1);
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316 return real_v;
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317 }
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318
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319 void
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320 use_register(int virt, int real, int move)
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321 {
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322 int real_v;
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323 char *move_op,*a,*b;
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324 if (rname[virt]==real)
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325 return;
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326 real_v = virtual(real);
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327 if (move || regs[real_v]) {
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328 if(regs[real_v]) {
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329 a=reg_name[real];
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330 b=reg_name[rname[virt]];
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331 printf("\txor \t%s,%s,%s\n",a,a,b);
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332 printf("\txor \t%s,%s,%s\n",b,a,b);
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333 printf("\txor \t%s,%s,%s\n",a,a,b);
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334 } else {
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335 printf("\tmove \t%s,%s\n",reg_name[real],reg_name[rname[virt]]);
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336 }
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337 }
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338 rname[real_v] = rname[virt];
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339 rname[virt] = real;
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340 crn = reg_name[rname[creg]];
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341 drn = reg_name[rname[dreg]];
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342 lrn = reg_name[rname[lreg]];
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343
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344 save_reg++;
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345 }
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346
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347 int
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348 pop_register(void)
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349 { /* レジスタから値を取り出す */
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350 int i,j;
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351
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352 j = creg;
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353 i = reg_stack[--reg_sp];
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354
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355 if(i<0) {
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356 return i;
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357 } else {
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358 free_register(i);
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359 lreg = i;
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360 lrn = reg_name[rname[lreg]];
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361 regs[i]=0;
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362 return lreg;
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363 }
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364 }
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365
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366 int
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367 stack_used(void) {
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368 return reg_stack[--reg_sp]<0;
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369 }
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370
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371 void
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372 emit_push(void)
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373 {
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374 int new_reg;
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375 new_reg = get_register();
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376 if(new_reg<0) { /* もうレジスタがない */
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377 reg_stack[reg_sp++] = -1;
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378 printf("\tsubu $sp,$sp,%d\n",size_of_int);
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379 printf("\tsw \t%s,0($sp)\n",crn);
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380 } else {
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381 reg_stack[reg_sp++] = creg; /* push するかわりにレジスタを使う */
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382 set_crn(new_reg);
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383 }
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384 }
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385
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386 char *
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387 emit_pop(int type)
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388 {
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389 char *xrn;
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390 if (pop_register()==-1) {
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391 printf("\tlw %s,0($sp)\n",drn);
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392 printf("\taddu $sp,$sp,%d\n",size_of_int);
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393 xrn = drn;
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394 xreg = dreg;
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395 } else {
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396 xrn = lrn;
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397 xreg = lreg;
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398 }
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399 return xrn;
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400 }
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401
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402 int
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403 get_register_var(void)
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404 {
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405 int i;
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406 for(i=REG_05;i<REG_31;i++) {
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407 if (! regs[i]) { /* 使われていないなら */
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408 regs[i]=1; /* そのレジスタを使うことを宣言し */
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409 return i; /* その場所を表す番号を返す */
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410 }
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411 }
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412 return -1;
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413 }
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414
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415 void
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416 gexpr(int e1)
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417 {
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418 gexpr_init();
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419 g_expr(e1);
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420 csvalue = rname[creg]; /* for siwtch value */
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421 }
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422
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423 void
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424 g_expr(int e1)
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425 {
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426 int e2,e3,e4;
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427 char *xrn;
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428 NMTBL *n;
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429
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430 if (chk) return;
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431 e2 = cadr(e1);
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432 switch (car(e1)){
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433 case GVAR:
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434 printf("\tla\t%s,%s\n",crn,caddr(e1));
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435 return;
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436 case RGVAR:
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437 printf("\tlw\t%s,%s\n",crn,caddr(e1));
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438 return;
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439 case CRGVAR:
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440 printf("\tlb\t%s,%s\n",crn,caddr(e1));
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441 return;
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442 case LVAR:
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443 printf("\taddu\t%s,$fp,%d\n",crn,lvar(e2));
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444 return;
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445 case REGISTER:
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446 /* this is of course redundant... */
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447 printf("\tmove\t%s,%s\n",crn,register_name(e2));
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448 return;
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449 case RLVAR:
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450 printf("\tlw\t%s,%d($fp)\n",crn,lvar(e2));
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451 return;
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452 case CRLVAR:
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453 printf("\tlb\t%s,%d($fp)\n",crn,lvar(e2));
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454 return;
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455 case FNAME:
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456 printf("\tla\t%s,%s\n",crn,((NMTBL *)e2)->nm);
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457 return;
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458 case CONST: /* 代入する値が0でも特別な処理はしない */
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459 printf("\tli\t%s,%d\n",crn,e2);
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460 return;
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461 case STRING:
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462 string(e1);
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463 return;
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464 case FUNCTION:
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465 function(e1);
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466 return;
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467 case CODE:
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468 jump(e2,caddr(e1));
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469 return;
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470 case INDIRECT:
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471 g_expr(e2);
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472 return;
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473 case RINDIRECT: case CRINDIRECT:
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474 rindirect(e1);
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475 return;
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476 case ADDRESS:
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477 g_expr(e2);
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478 return;
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479 case MINUS: /* レジスタに対し、引き算を実行すれば実現可能 */
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480 g_expr(e2);
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481 printf("\tsubu\t%s,$0,%s\n",crn,crn);
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482 return;
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483 case BNOT: /* ~ */
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484 g_expr(e2);
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485 /* use_data_reg(creg,1); */
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486 printf("\tnor\t%s,$0,%s\n",crn,crn);
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487 return;
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488 case LNOT: /* ! */
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489 g_expr(e2);
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490 /*use_data_reg(creg,1);*/
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491 printf("\txori\t%s,%s,0x0000\n",drn,crn);
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492 printf("\tsltu\t%s,%s,1\n",crn,drn);
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493 return;
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494 case PREINC:/* ++q */
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495 if (car(e2)==REGISTER) {
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496 printf("\taddu \t%s,%s,%d\n",register_name(cadr(e2)),register_name(cadr(e2)),caddr(e1));
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497 return;
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498 }
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499 g_expr(e2);
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500 printf("\taddu \t%s,%s,%d\n",crn,crn,caddr(e1));
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501 return;
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502 case POSTINC:/* p++ */
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503 if (car(e2)==REGISTER) {
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504 printf("\taddu \t%s,%s,%d\n",register_name(cadr(e2)),register_name(cadr(e2)),caddr(e1));
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505 return;
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506 }
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507 g_expr(e2);
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508 emit_push();
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509 /* in case of register full we should copy crn to drn */
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510 xrn = emit_pop(0);
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511 printf("\taddu \t%s,%s,%d\n",crn,xrn,caddr(e1));
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512 return;
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513 case CPOSTINC:
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514 /* char *p; *p++ */
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515 if (car(e2)==REGISTER) {
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516 printf("\tmove\t%s,%s\n",crn,register_name(cadr(e2)));
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517 printf("\taddu\t%s,%s,%d\n",register_name(cadr(e2)),register_name(cadr(e2)),caddr(e1));
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518 return;
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519 }
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520 g_expr(e2);
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521 emit_push(); /* in case of register full we should copy crn to drn */
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522 xrn = emit_pop(0);
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523 printf("\tmovsbl (%s),%s\n",xrn,crn);
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524 printf("\tincl (%s)\n",xrn);
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525 return;
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526 case CPREINC: /* char *p; *++p */
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527 if (car(e2)==REGISTER) {
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528 printf("\taddu\t%s,%s,%d\n",register_name(cadr(e2)),register_name(cadr(e2)),caddr(e1));
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529 printf("\tmove\t%s,%s\n",crn,register_name(cadr(e2)));
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530 return;
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531 }
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532 g_expr(e2);
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533 printf("\tincl (%s)\n",crn);
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534 printf("\tmovsbl (%s),%s\n",crn,crn);
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535 return;
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536 case CPOSTDEC:/* char *p; *p-- */
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537 if (car(e2)==REGISTER) {
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538 printf("\tmove\t%s,%s\n",crn,register_name(cadr(e2)));
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539 printf("\tsubu\t%s,%s,1\n",register_name(cadr(e2)),register_name(cadr(e2)));
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540 return;
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541 }
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542 g_expr(e2);
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543 printf("\tmovsbl (%s),%s\n",crn,crn);
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544 printf("\tdecl (%s)\n",crn);
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545 return;
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546 case CPREDEC:/* char *p; *--p */
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547 if (car(e2)==REGISTER) {
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548 printf("\tdecl %s\n",register_name(cadr(e2)));
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549 printf("\tmove\t%s,%s\n",crn,register_name(cadr(e2)));
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550 return;
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551 }
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552 g_expr(e2);
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553 emit_push();
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554 xrn = emit_pop(0);
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555 printf("\tdecl (%s)\n",xrn);
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556 printf("\tmovsbl (%s),%s\n",xrn,crn);
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557 return;
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558 case MUL: case UMUL:
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559 case DIV: case UDIV:
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560 case MOD: case UMOD:
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561 case LSHIFT: case ULSHIFT: case RSHIFT: case URSHIFT:
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562 case ADD: case SUB: case BAND: case EOR: case BOR:
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563 machinop(e1);
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564 return;
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565 case COND:
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566 e2=fwdlabel();
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567 b_expr(cadr(e1),0,e2);
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568 g_expr(caddr(e1));
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569 e4 = rname[creg];
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570 jmp(e3=fwdlabel());
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571 fwddef(e2);
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572 g_expr(cadddr(e1));
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573 use_register(creg,e4,1);
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574 fwddef(e3);
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575 return;
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164
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576 case STASS:
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51
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577 sassign(e1);
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578 return;
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579 case ASS: case CASS:
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580 assign(e1);
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581 return;
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582 case ASSOP: case CASSOP:
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583 assop(e1);
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584 return;
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585 case COMMA:
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586 g_expr(e2);
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587 g_expr(caddr(e1));
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588 return;
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589 case RETURN:
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590 n = (NMTBL *)e2;
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591 if (retcont==0)
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592 retcont=fwdlabel();
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593 printf("\tla\t%s,$L%d\n",crn,retcont);
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594 return;
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595 case ENVIRONMENT:
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596 printf("\tmove\t%s,$fp\n",crn);
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597 return;
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598 default:
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599 b_expr(e1,1,e2=fwdlabel()); /* including > < ... */
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600 /*printf("\txor \t%s,%s\n",crn,crn);*/
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601 jmp(e3=fwdlabel());
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602 fwddef(e2);
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603 printf("\tli \t%s,%d\n",crn,lvar(e2));
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604 fwddef(e3);
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605 }
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606 }
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607
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608 void
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609 bexpr(int e1, char cond, int l1)
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610 {
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611 gexpr_init();
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612 b_expr(e1,cond,l1);
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613 }
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614
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615 void
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616 b_expr(int e1, char cond, int l1)
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617 {
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618 int e2,l2;
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619 if (chk) return;
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620 e2=cadr(e1);
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621 switch(car(e1)) {
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622 case LNOT:
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|
623 b_expr(e2,!cond,l1);
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624 return;
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625 case GT:
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626 /*rexpr(e1,l1,cond?"bg":"ble");*/
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627 return;
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628 case UGT:
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|
629 /*rexpr(e1,l1,cond?"ba":"bbe");*/
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|
630 return;
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|
631 case GE:
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632 /*rexpr(e1,l1,cond?"bge":"bl");*/
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|
633 return;
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|
634 case UGE:
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635 /*rexpr(e1,l1,cond?"bae":"bb");*/
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636 return;
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|
637 case LT:
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|
638 /*rexpr(e1,l1,cond?"bl":"bge");*/
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|
639 return;
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640 case ULT:
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|
641 /*rexpr(e1,l1,cond?"bb":"bae");*/
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|
642 return;
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|
643 case LE:
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644 /*rexpr(e1,l1,cond?"ble":"bg");*/
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|
|
645 return;
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|
646 case ULE:
|
|
|
647 /*rexpr(e1,l1,cond?"bbe":"ba");*/
|
|
|
648 return;
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|
|
649 case EQ:
|
|
|
650 rexpr(e1,l1,cond?"beq":"bne");
|
|
|
651 return;
|
|
|
652 case NEQ:
|
|
|
653 rexpr(e1,l1,cond?"bne":"beq");
|
|
|
654 return;
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|
|
655 case LAND:
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|
|
656 b_expr(e2,0,cond?(l2=fwdlabel()):l1);
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|
|
657 b_expr(caddr(e1),cond,l1);
|
|
|
658 if(cond) fwddef(l2);
|
|
|
659 return;
|
|
|
660 case LOR:
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|
|
661 b_expr(e2,1,cond?l1:(l2=fwdlabel()));
|
|
|
662 b_expr(caddr(e1),cond,l1);
|
|
|
663 if(!cond) fwddef(l2);
|
|
|
664 return;
|
|
|
665 case CRGVAR:
|
|
|
666 /*printf("\tcmpb $0,%s\n",caddr(e1));*/
|
|
|
667 jcond(l1,cond);
|
|
|
668 return;
|
|
|
669 case CRLVAR:
|
|
|
670 /*printf("\tcmpb $0,%d($fp)\n",lvar(e2));*/
|
|
|
671 jcond(l1,cond);
|
|
|
672 return;
|
|
|
673 case RGVAR:
|
|
|
674 /*printf("\tcmpl $0,%s\n",caddr(e1));*/
|
|
|
675 jcond(l1,cond);
|
|
|
676 return;
|
|
|
677 case RLVAR:
|
|
|
678 /*printf("\tlw \t%s,%d($fp)\n",crn,lvar(e2));*/
|
|
|
679 jcond(l1,cond);
|
|
|
680 return;
|
|
|
681 case REGISTER:
|
|
|
682 /*printf("\tcmpl $0,%s\n",register_name(e2));*/
|
|
|
683 jcond(l1,cond);
|
|
|
684 return;
|
|
|
685 case CONST:
|
|
|
686 if((cond&&e2)||(!cond&&!e2)) jmp(l1);
|
|
|
687 return;
|
|
|
688 default:
|
|
|
689 g_expr(e1);
|
|
|
690 /*printf("\tcmpl $0,%s\n",crn);*/
|
|
|
691 jcond(l1,cond);
|
|
|
692 return;
|
|
|
693 }
|
|
|
694 }
|
|
|
695
|
|
|
696 void
|
|
|
697 ascii(char *s)
|
|
|
698 {
|
|
|
699 printf("\t.ascii \"");
|
|
|
700 while(*s) {
|
|
|
701 if (*s=='\n')
|
|
|
702 printf("%cn",92);
|
|
|
703 else if (*s<' ')
|
|
|
704 printf("%c%03o",92,*s);
|
|
|
705 else if (*s==34)
|
|
|
706 printf("%c%c",92,34);
|
|
|
707 else
|
|
|
708 printf("%c",*s);
|
|
|
709 s++;
|
|
|
710 }
|
|
|
711 printf("%c\n",34);
|
|
|
712 }
|
|
|
713
|
|
|
714 void
|
|
|
715 string(int e1)
|
|
|
716 {
|
|
|
717 char *s;
|
|
|
718 int i,lb;
|
|
|
719
|
|
|
720 if (0) {
|
|
|
721 s=(char *)cadr(e1);
|
|
|
722 printf("\t.rdata\n");
|
|
|
723 printf("\t.align\t2\n");
|
|
|
724 lb=fwdlabel();
|
|
|
725 printf("\tj\t$L%d\n",lb);
|
|
|
726 i=backdef();
|
|
|
727 ascii(s);
|
|
|
728 printf("\t.align 2\n");
|
|
|
729 fwddef(lb);
|
|
|
730 printf("\tla\t%s,$L%d\n",crn,i);
|
|
|
731 } else {
|
|
|
732 s=(char *)cadr(e1);
|
|
|
733 printf("\t.rdata\n");
|
|
|
734 printf("\t.align\t2\n");
|
|
|
735 lb=fwdlabel();
|
|
|
736 printf("$L%d:\n",lb);
|
|
|
737 ascii(s);
|
|
|
738 if (output_mode==TEXT_EMIT_MODE) {
|
|
|
739 printf("\t.text\n");
|
|
|
740 } else {
|
|
|
741 text_mode();
|
|
|
742 }
|
|
|
743 printf("\tla\t%s,$L%d\n",crn,lb);
|
|
|
744 }
|
|
|
745 }
|
|
|
746
|
|
|
747 void
|
|
|
748 function(int e1)
|
|
|
749 {
|
|
|
750 int e2,e3,e4,e5,nargs;
|
|
|
751 NMTBL *n;
|
|
|
752
|
|
|
753 e2 = cadr(e1);
|
|
|
754 nargs = 0;
|
|
|
755 for (e3 = caddr(e1); e3; e3 = cadr(e3)) {
|
|
|
756 n=(NMTBL *)(e5=(cadr(e4 = car(e3))));
|
|
|
757 switch(car(e4)){
|
|
|
758 case FNAME:
|
|
|
759 printf("\tlw\t%s,0(%s)\n",crn,n->nm);
|
|
|
760 break;
|
|
|
761 case ADDRESS:
|
|
|
762 g_expr(e5);
|
|
|
763 break;
|
|
|
764 default:g_expr(e4);
|
|
|
765 }
|
|
|
766 ++nargs;
|
|
|
767 }
|
|
|
768 if (car(e2) == FNAME) {
|
|
|
769 n=(NMTBL *)cadr(e2);
|
|
|
770 use_register(creg,REG_04,0);
|
|
|
771 printf("\tjal\t%s\n",n->nm);
|
|
|
772 } else {
|
|
|
773 g_expr(e2);
|
|
|
774 use_register(creg,REG_04,0);
|
|
|
775 printf("\tjal\t*%s\n",crn);
|
|
|
776 }
|
|
|
777 /*if (nargs) printf("\taddl $%d,%%esp\n",size_of_int*nargs);*/
|
|
|
778 }
|
|
|
779
|
|
|
780 int
|
|
|
781 arg_size(int e3,int *nargs0)
|
|
|
782 {
|
|
|
783 int i,nargs,offset_list,e,t;
|
|
|
784
|
|
|
785 offset_list = 0;
|
|
|
786 /* we should use prototypes's type */
|
|
|
787 for (i = nargs = 0; e3;e3 =cadr(e3)) {
|
|
|
788 e = car(e3); t = caddr(e3);
|
|
|
789 if (i < MAX_REGISTER_VAR && scalar(t)) {
|
|
|
790 offset_list = list3(-(REG_05+i++),offset_list,e);
|
|
|
791 } else {
|
|
|
792 offset_list =
|
|
|
793 list3(nargs,offset_list,e);
|
|
|
794 nargs += (car(e3)==CHAR?size_of_int:size(t));
|
|
|
795 }
|
|
|
796 }
|
|
|
797 *nargs0 = -nargs;
|
|
|
798 return offset_list;
|
|
|
799 }
|
|
|
800
|
|
|
801 void
|
|
|
802 jump(int e1, int env)
|
|
|
803 {
|
|
|
804 int i,args,e2,e3,e4,e5,nargs,nargs0,regs;
|
|
|
805 NMTBL *n,*code0;
|
|
|
806 int new_disp,scode,disp1;
|
|
|
807 char *xrn;
|
|
|
808
|
|
|
809 /* We need three passes. Compute Stack size, Compute Arg, Copy it. */
|
|
|
810 /* count number of args */
|
|
|
811 args = caddr(e1);
|
|
|
812 args = reverse0(args);
|
|
|
813 nargs = arg_size(args,&new_disp); /* compute in normal order */
|
|
|
814 disp1 = (fnptr->sc==CODE)?0:-size_of_int;
|
|
|
815 if (new_disp+disp1 < disp) { /* have to extend stack */
|
|
|
816 if (fnptr->sc==CODE)
|
|
|
817 printf("\tlw\t$sp,%d($fp)\n",new_disp-size_of_int);
|
|
|
818 else
|
|
|
819 printf("\tlw\t$sp,%d($fp)\n",new_disp+disp_offset);
|
|
|
820 }
|
|
|
821 /* compute jump address */
|
|
|
822 e2 = cadr(e1);
|
|
|
823 if (car(e2) == FNAME) {
|
|
|
824 code0=(NMTBL *)cadr(e2);
|
|
|
825 if (code0->sc!=CODE) {
|
|
|
826 error(STERR); return;
|
|
|
827 }
|
|
|
828 } else { /* indirect */
|
|
|
829 g_expr(e2);
|
|
|
830 emit_push();
|
|
|
831 }
|
|
|
832 /* compute arguments in reverse order */
|
|
|
833 regs = 0;
|
|
|
834 i=MAX_REGISTER_VAR;
|
|
|
835 for (e3=nargs; e3;e3 =cadr(e3)) {
|
|
|
836 n=(NMTBL *)(e5=(cadr(e4 = caddr(e3))));
|
|
|
837 switch(car(e4)) {
|
|
|
838 case FNAME:
|
|
|
839 printf("\tlw\t%s,0(%s)\n",crn,n->nm);
|
|
|
840 emit_push();
|
|
|
841 break;
|
|
|
842 case ADDRESS:
|
|
|
843 g_expr(e5);
|
|
|
844 emit_push();
|
|
|
845 break;
|
|
|
846 case RLVAR:
|
|
|
847 case CRLVAR:
|
|
|
848 if (env==0 && fnptr->sc==CODE) {
|
|
|
849 if (e5>=0 && e5==car(e3)) {
|
|
|
850 /* The same positioned local variable. No need to copy */
|
|
|
851 reg_stack[reg_sp++] = -2;
|
|
|
852 }
|
|
|
853 break;
|
|
|
854 }
|
|
|
855 g_expr(e4);
|
|
|
856 emit_push();
|
|
|
857 break;
|
|
|
858 case REGISTER:
|
|
|
859 if (i>0 && rname[e5]==REG_05+ --i) {
|
|
|
860 /* The same register variable. No need to copy */
|
|
|
861 reg_stack[reg_sp++] = e5;
|
|
|
862 break;
|
|
|
863 }
|
|
|
864 default:
|
|
|
865 g_expr(e4);
|
|
|
866 emit_push();
|
|
|
867 }
|
|
|
868 regs++;
|
|
|
869 }
|
|
|
870 if (env) {
|
|
|
871 /* change the frame pointer */
|
|
|
872 g_expr(env);
|
|
|
873 printf("\tmove\t%s,$fp\n",crn);
|
|
|
874 } else if (fnptr->sc==FUNCTION) {
|
|
|
875 printf("\tlw\t$fp,%d($fp)\n",disp_offset);
|
|
|
876 }
|
|
|
877 /* force lvar offset mode to CODE */
|
|
|
878 scode = fnptr->sc; fnptr->sc = CODE;
|
|
|
879 /* copy arguments to destination environment if necessary */
|
|
|
880 nargs = reverse0(nargs); /* pop in normal order */
|
|
|
881 i=0;
|
|
|
882 for (e3=nargs; e3;e3 =cadr(e3)) {
|
|
|
883 if ((e4=car(e3))<0) {
|
|
|
884 /* register case */
|
|
|
885 if (reg_stack[--reg_sp]>=REG_05) {
|
|
|
886 /* the same registger */
|
|
|
887 } else {
|
|
|
888 if(reg_stack[reg_sp]<0) {
|
|
|
889 /*printf("\tpopl %s\n",reg_name[rname[REG_05+i]]);*/ /* e4? */
|
|
|
890 } else {
|
|
|
891 printf("\tmove\t%s,%s\n",
|
|
|
892 reg_name[rname[REG_05+i]],
|
|
|
893 reg_name[rname[reg_stack[reg_sp]]]); /* e4? */
|
|
|
894 free_register(reg_stack[reg_sp]);
|
|
|
895 }
|
|
|
896 i++;
|
|
|
897 }
|
|
|
898 } else {
|
|
|
899 /* local variable case */
|
|
|
900 if (reg_stack[reg_sp-1]== -2) {
|
|
|
901 /* same positioned variable */
|
|
|
902 reg_sp--;
|
|
|
903 } else {
|
|
|
904 xrn=emit_pop(0);
|
|
|
905 printf("\tlw\t%s,%d($fp)\n",xrn, lvar(e4));
|
|
|
906 }
|
|
|
907 }
|
|
|
908 }
|
|
|
909 if (car(e2) != FNAME) {
|
|
|
910 xrn=emit_pop(0);
|
|
|
911 }
|
|
|
912 if (!env && new_disp+disp1>disp) {
|
|
|
913 /* shrink stack if necessary */
|
|
|
914 printf("\tlw\t$sp,%d($fp)\n",new_disp-size_of_int);
|
|
|
915 }
|
|
|
916 if (car(e2) == FNAME) {
|
|
|
917 printf("\tj\t%s\n",code0->nm);
|
|
|
918 } else {
|
|
|
919 printf("\tj\t*%s\n",xrn);
|
|
|
920 }
|
|
|
921 fnptr->sc = scode;
|
|
|
922 }
|
|
|
923
|
|
|
924
|
|
|
925 void
|
|
|
926 machinop(int e1)
|
|
|
927 {
|
|
|
928 int e2,e3,op;
|
|
|
929
|
|
|
930 e2 = cadr(e1);
|
|
|
931 op = car(e1);
|
|
|
932 e3 = caddr(e1);
|
|
|
933 g_expr(e3);
|
|
|
934 emit_push();
|
|
|
935 g_expr(e2);
|
|
|
936 tosop(car(e1));
|
|
|
937 return;
|
|
|
938 }
|
|
|
939
|
|
|
940
|
|
|
941 void
|
|
|
942 rindirect(int e1) /* *(p +5 ) */
|
|
|
943
|
|
|
944 {
|
|
|
945 char *op;
|
|
|
946 int e2,e3,byte;
|
|
|
947
|
|
|
948 op = ((byte = (car(e1) == CRINDIRECT)) ? "lb" : "lw");
|
|
|
949 e3 = cadr(e2 = cadr(e1));
|
|
|
950 g_expr(e2);
|
|
|
951 printf("\t%s \t%s,%d(%s)\n",op,crn,lvar(e3),crn);
|
|
|
952 }
|
|
|
953
|
|
|
954 void
|
|
|
955 sassign(int e1)
|
|
|
956 {
|
|
|
957 int e2,e3,e4,sz;
|
|
|
958 char *xrn;
|
|
|
959
|
|
|
960 e2 = cadr(e1);
|
|
|
961 e3 = cadr(e2);
|
|
|
962 e4 = caddr(e1);
|
|
|
963 sz = size(cadr(e2)); /* cld rep movsb */
|
|
|
964 g_expr(e4);
|
|
|
965 emit_push();
|
|
|
966 g_expr(e2);
|
|
|
967 xrn = emit_pop(0);
|
|
|
968 return;
|
|
|
969 }
|
|
|
970
|
|
|
971 void
|
|
|
972 assign(int e1)
|
|
|
973 {
|
|
|
974 char *op;
|
|
|
975 int e2,e3,e4,byte;
|
|
|
976 char *xrn;
|
|
|
977
|
|
|
978 op = ((byte=(car(e1) == CASS))? "sb" : "sw");
|
|
|
979 /* e2=e4 */
|
|
|
980 e2 = cadr(e1);
|
|
|
981 e3 = cadr(e2);
|
|
|
982 e4 = caddr(e1);
|
|
|
983 switch(car(e2)) {
|
|
|
984 case GVAR: /* i=3 */
|
|
|
985 g_expr(e4);
|
|
|
986 /*if (byte) use_data_reg(creg,1);*/
|
|
|
987 printf("\t%s \t%s,%s\n",op,crn,caddr(e2));
|
|
|
988 return;
|
|
|
989 case LVAR:
|
|
|
990 g_expr(e4);
|
|
|
991 /*if (byte) use_data_reg(creg,1);*/
|
|
|
992 printf("\t%s \t%s,%d($fp)\n",op,crn,lvar(cadr(e2))*-1);
|
|
|
993 return;
|
|
|
994 case REGISTER:
|
|
|
995 g_expr(e4);
|
|
|
996 if (creg!=cadr(e2))
|
|
|
997 printf("\t%s \t%s,%s\n",op,crn,register_name(cadr(e2)));
|
|
|
998 return;
|
|
|
999 }
|
|
|
1000 g_expr(e4);
|
|
|
1001 emit_push();
|
|
|
1002 g_expr(e2);
|
|
|
1003 xrn = emit_pop(0);
|
|
|
1004 /*if (byte) use_data_reg(creg,1);*/
|
|
|
1005 printf("\t%s %s,(%s)\n",op,xrn,crn);
|
|
|
1006 printf("\tmove\t%s,%s\n",crn,xrn);
|
|
|
1007 return;
|
|
|
1008 }
|
|
|
1009
|
|
|
1010 void
|
|
|
1011 assop(int e1)
|
|
|
1012 {
|
|
|
1013 int e2,e3,byte,op,new_reg;
|
|
|
1014 char *xrn;
|
|
|
1015
|
|
|
1016 /* e2 op= e3 */
|
|
|
1017 byte = (car(e1) == CASSOP);
|
|
|
1018 e2 = cadr(e1);
|
|
|
1019 if (car(e2)==INDIRECT) e2=cadr(e2);
|
|
|
1020 e3 = caddr(e1);
|
|
|
1021 op = cadddr(e1);
|
|
|
1022
|
|
|
1023 g_expr(e3);
|
|
|
1024 emit_push();
|
|
|
1025 if (car(e2)==REGISTER) {
|
|
|
1026 new_reg=creg;
|
|
|
1027 set_crn(cadr(e2));
|
|
|
1028 tosop(op);
|
|
|
1029 set_crn(new_reg);
|
|
|
1030 printf("\tmove\t%s,%s\n",crn,register_name(cadr(e2)));
|
|
|
1031 return;
|
|
|
1032 }
|
|
|
1033 g_expr(e2);
|
|
|
1034 xrn = emit_pop(0); /* pop e3 value */
|
|
|
1035 /*printf("\tpushl %s # assop \n",crn);*/ /* push e2 address */
|
|
|
1036 ld_indexx(byte,0,crn);
|
|
|
1037 new_reg = get_register();
|
|
|
1038 /* push e3 value */
|
|
|
1039 if(new_reg<0) { /* もうレジスタがない */
|
|
|
1040 reg_stack[reg_sp++] = -1;
|
|
|
1041 /*printf("\tpushl %s\n",xrn);*/
|
|
|
1042 } else {
|
|
|
1043 reg_stack[reg_sp++] = xreg; /* push するかわりにレジスタを使う */
|
|
|
1044 }
|
|
|
1045 tosop(op);
|
|
|
1046 if(new_reg>=0) free_register(new_reg);
|
|
|
1047 /*printf("\tpopl %s # assop \n",drn);*/
|
|
|
1048 printf("\t%s\t%s,0(%s)\n",byte ? "lb" : "lw",crn,drn);
|
|
|
1049 return;
|
|
|
1050
|
|
|
1051 }
|
|
|
1052
|
|
|
1053
|
|
|
1054 void
|
|
|
1055 tosop(int op)
|
|
|
1056 {
|
|
|
1057 int oreg;
|
|
|
1058 char *orn;
|
|
|
1059
|
|
|
1060 oreg = pop_register();
|
|
|
1061 switch(op) {
|
|
|
1062 case LSHIFT:
|
|
|
1063 case ULSHIFT:
|
|
|
1064 shift("sall",oreg);
|
|
|
1065 return;
|
|
|
1066 case RSHIFT:
|
|
|
1067 shift("sarl",oreg);
|
|
|
1068 return;
|
|
|
1069 case URSHIFT:
|
|
|
1070 shift("shrl",oreg);
|
|
|
1071 return;
|
|
|
1072 }
|
|
|
1073 if(oreg==-1) {
|
|
|
1074 oreg = dreg;
|
|
|
1075 }
|
|
|
1076 orn = reg_name[rname[oreg]];
|
|
|
1077 switch(op) {
|
|
|
1078 case ADD:
|
|
|
1079 printf("\taddu \t%s,%s,%s\n",crn,crn,orn);
|
|
|
1080 return;
|
|
|
1081 case SUB:
|
|
|
1082 printf("\tsubu \t%s,%s,%s\n",crn,crn,orn);
|
|
|
1083 return;
|
|
|
1084 case BAND:
|
|
|
1085 printf("\tand \t%s,%s,%s\n",crn,crn,orn);
|
|
|
1086 return;
|
|
|
1087 case EOR:
|
|
|
1088 printf("\txor \t%s,%s,%s\n",crn,crn,orn);
|
|
|
1089 return;
|
|
|
1090 case BOR:
|
|
|
1091 printf("\tor \t%s,%s,%s\n",crn,crn,orn);
|
|
|
1092 return;
|
|
|
1093 case MUL:
|
|
|
1094 case UMUL:
|
|
|
1095 printf("\t%s\t%s,%s\n","mult",crn,orn);
|
|
|
1096 printf("\tmflo\t%s\n",crn);
|
|
|
1097 return;
|
|
|
1098 case DIV:
|
|
|
1099 case UDIV:
|
|
|
1100 if (op==DIV)
|
|
|
1101 printf("\tdiv\t%s,%s,%s\n",crn,crn,orn);
|
|
|
1102 else
|
|
|
1103 printf("\txor\t%s,%s,%s\n\tdiv\t%s,%s,%s\n",crn,crn,orn,crn,crn,orn);
|
|
|
1104 return;
|
|
|
1105 case MOD:
|
|
|
1106 case UMOD:
|
|
|
1107 if (op==MOD)
|
|
|
1108 printf("\trem\t%s,%s,%s\n",crn,crn,orn);
|
|
|
1109 else
|
|
|
1110 printf("\txor\t%s,%s,%s\n\tdiv\t%s,%s,%s\n",crn,crn,orn,crn,crn,orn);
|
|
|
1111 return;
|
|
|
1112 }
|
|
|
1113 }
|
|
|
1114
|
|
|
1115 void
|
|
|
1116 shift(char *op, int reg)
|
|
|
1117 {
|
|
|
1118 if (reg>=0) {
|
|
|
1119 use_register(lreg,REG_03,1);
|
|
|
1120 } else {
|
|
|
1121 use_register(dreg,REG_03,0);
|
|
|
1122 }
|
|
|
1123 /*printf("\t%s %%cl,%s\n",op,crn);*/
|
|
|
1124 }
|
|
|
1125
|
|
|
1126 void
|
|
|
1127 ld_indexx(int byte, int n, char *xrn)
|
|
|
1128 {
|
|
|
1129 char *op;
|
|
|
1130
|
|
|
1131 op = byte ? "lb" : "lw";
|
|
|
1132 if (n)
|
|
|
1133 printf("\t%s\t%s,%d(%s)\n",op,crn,n,xrn);
|
|
|
1134 else
|
|
|
1135 printf("\t%s\t%s,0(%s)\n",op,crn,xrn);
|
|
|
1136 }
|
|
|
1137
|
|
|
1138 void
|
|
|
1139 st_indexx(int byte, int n, char *xrn)
|
|
|
1140 {
|
|
|
1141 char *op;
|
|
|
1142
|
|
|
1143 op = byte ? "sb" : "sw";
|
|
|
1144 if (n)
|
|
|
1145 printf("\t%s\t%s,%d(%s)\n",op,crn,n,xrn);
|
|
|
1146 else
|
|
|
1147 printf("\t%s\t%s,0(%s)\n",op,crn,xrn);
|
|
|
1148 }
|
|
|
1149
|
|
|
1150 void
|
|
|
1151 indexy(char *op, char *gvar)
|
|
|
1152 {
|
|
|
1153 printf("\t%s %s,%s\n",op,crn,gvar);
|
|
|
1154 }
|
|
|
1155
|
|
|
1156 void
|
|
|
1157 cmpdimm(int e, int csreg)
|
|
|
1158 {
|
|
|
1159 /* used in dosiwtch() */
|
|
|
1160 use_register(creg,csreg,0);
|
|
|
1161 /*printf("\tcmpl $%d,%s\n",e,crn);*/
|
|
|
1162 }
|
|
|
1163
|
|
|
1164 void
|
|
|
1165 opening(char *filename)
|
|
|
1166 {
|
|
|
1167 printf("\t.file \t1 \"%s\"\n",filename);
|
|
|
1168 printf(" # GNU C 2.7.2.2 [AL 1.1, MM 40] Sony PlayStation compiled by GNU C\n\n");
|
|
|
1169 printf(" # Cc1 defaults:\n\n");
|
|
|
1170 printf(" # Cc1 arguments (-G value = 8, Cpu = 3000, ISA = 1):\n");
|
|
|
1171 printf(" # -msoft-float -quiet -dumpbase -o\n\n");
|
|
|
1172 printf(" # gcc2_compiled.:\n");
|
|
|
1173 printf(" # __gnu_compiled_c:\n");
|
|
|
1174
|
|
|
1175 printf("\t.text\n");
|
|
|
1176 emit_init();
|
|
|
1177 }
|
|
|
1178
|
|
|
1179 void
|
|
|
1180 closing(void)
|
|
|
1181 {
|
|
|
1182 global_table();
|
|
|
1183 }
|
|
|
1184
|
|
|
1185 void
|
|
|
1186 jmp_label(int l)
|
|
|
1187 {
|
|
|
1188 printf("\tjmp\t_%d\n",l);
|
|
|
1189 }
|
|
|
1190
|
|
|
1191 void
|
|
|
1192 jmp_eq_label(int l)
|
|
|
1193 {
|
|
|
1194 printf("\tj\t_%d\n",l);
|
|
|
1195 }
|
|
|
1196
|
|
|
1197 void
|
|
|
1198 rexpr(int e1, int l1, char *s)
|
|
|
1199 {
|
|
|
1200 g_expr(list3(SUB,cadr(e1),caddr(e1)));
|
|
|
1201 printf("\t%s\t%s,%s,$L%d\n",s,crn,crn,l1);
|
|
|
1202 }
|
|
|
1203
|
|
|
1204 void
|
|
|
1205 jcond(int l, char cond)
|
|
|
1206 {
|
|
|
1207 printf("\t%s\t%s,%s,$L%d\n",cond?"bne":"beq",crn,crn,l);
|
|
|
1208 }
|
|
|
1209
|
|
|
1210 void
|
|
|
1211 jmp(int l)
|
|
|
1212 {
|
|
|
1213 control=0;
|
|
|
1214 printf("\tj\t$L%d\n",l);
|
|
|
1215 /* align? */
|
|
|
1216 }
|
|
|
1217
|
|
|
1218 int
|
|
|
1219 fwdlabel(void)
|
|
|
1220 {
|
|
|
1221 return labelno++;
|
|
|
1222 }
|
|
|
1223
|
|
|
1224 void
|
|
|
1225 fwddef(int l)
|
|
|
1226 {
|
|
|
1227 control=1;
|
|
|
1228 printf("$L%d:\n",l);
|
|
|
1229 }
|
|
|
1230
|
|
|
1231 int
|
|
|
1232 backdef(void)
|
|
|
1233 {
|
|
|
1234 control=1;
|
|
|
1235 printf("$L%d:\n",labelno);
|
|
|
1236 return labelno++;
|
|
|
1237 }
|
|
|
1238
|
|
|
1239 void
|
|
|
1240 def_label(int cslabel, int dlabel)
|
|
|
1241 {
|
|
|
1242 int fl;
|
|
|
1243
|
|
|
1244 fl = 0;
|
|
|
1245 if (control) {
|
|
|
1246 jmp(fl=fwdlabel());
|
|
|
1247 }
|
|
|
1248 fwddef(cslabel);
|
|
|
1249 if (dlabel)
|
|
|
1250 jmp(dlabel);
|
|
|
1251 if (fl) {
|
|
|
1252 fwddef(fl);
|
|
|
1253 }
|
|
|
1254 }
|
|
|
1255
|
|
|
1256 void
|
|
|
1257 gen_comment(char *s)
|
|
|
1258 {
|
|
|
1259 printf("# %s",s);
|
|
|
1260 }
|
|
|
1261
|
|
|
1262 void
|
|
|
1263 gen_source(char *s)
|
|
|
1264 {
|
|
|
1265 printf("%s",s);
|
|
|
1266 }
|
|
|
1267
|
|
|
1268 void
|
|
|
1269 code_enter(char *name)
|
|
|
1270 {
|
|
|
1271 printf("\t.align 4\n");
|
|
|
1272 if (stmode!=STATIC)
|
|
|
1273 printf(".globl %s\n",name);
|
|
|
1274 printf("\t.type\t%s,@function\n",name);
|
|
|
1275 printf("%s:\n",name);
|
|
|
1276 }
|
|
|
1277
|
|
|
1278 void
|
|
|
1279 code_enter1(int disp0,int args)
|
|
|
1280 {
|
|
|
1281 if(disp0) {
|
|
|
1282 printf("\tsubl $%d,%%esp\n",-disp0);
|
|
|
1283 }
|
|
|
1284 }
|
|
|
1285
|
|
|
1286 void
|
|
|
1287 code_leave(char *name)
|
|
|
1288 {
|
|
|
1289 local_table();
|
|
|
1290 printf("$L%d:\n",labelno);
|
|
|
1291 printf("\t.size\t%s,_%d-%s\n",name,labelno,name);
|
|
|
1292 labelno++;
|
|
|
1293 }
|
|
|
1294
|
|
|
1295 void
|
|
|
1296 enter(char *name, int disp)
|
|
|
1297 {
|
|
|
1298 int a,b,i;
|
|
|
1299 a = b = 0;
|
|
|
1300
|
|
|
1301 /*printf("\t.text\n");
|
|
|
1302 printf("\t.align \t2\n");
|
|
|
1303 if (stmode!=STATIC)
|
|
|
1304 printf("\t.globl \t%s\n",name);*/
|
|
|
1305 printf("%s:\n",name);
|
|
|
1306
|
|
|
1307 printf("\t.frame \t$fp,%d,$31\n",-disp+save_reg*size_of_int);
|
|
|
1308
|
|
|
1309
|
|
|
1310 if(disp) a = 8;
|
|
|
1311
|
|
|
1312 printf("\t.mask \t0x%d0000000,-8\n",a);
|
|
|
1313 printf("\t.fmask \t0x00000000,0\n");
|
|
|
1314
|
|
|
1315 if(disp){
|
|
|
1316 printf("\tsubu \t$sp,$sp,%d\n",-disp+save_reg*size_of_int);
|
|
|
1317 printf("\tsw\t$31,%d($sp)\n",-disp+4*save_reg1);
|
|
|
1318 save_reg1--;
|
|
|
1319 }
|
|
|
1320 for(i=save_reg1;i==0;i--) {
|
|
|
1321 printf("\tsw\t$%d,%d($sp)\n",16+i,-disp+4*i);
|
|
|
1322 }
|
|
|
1323
|
|
|
1324 /*if(strcmp("main",name))
|
|
|
1325 printf("\tjal \t%s_0\n",name);
|
|
|
1326 else
|
|
|
1327 printf("\tjal \t__%s_0\n",name);*/
|
|
|
1328
|
|
|
1329 printf("\tjal \t%s_0\n",name);
|
|
|
1330
|
|
|
1331 printf("\t.end \t%s\n",name);
|
|
|
1332 printf("\t.sdata\n");
|
|
|
1333 printf("\t.align 2\n");
|
|
|
1334
|
|
|
1335 save_reg = 0;
|
|
|
1336 save_reg1 = 0;
|
|
|
1337 }
|
|
|
1338
|
|
|
1339 /* void
|
|
|
1340 enter_no(char *name, int disp)
|
|
|
1341 {
|
|
|
1342
|
|
|
1343 printf("\t.align \t2\n");
|
|
|
1344 if (stmode!=STATIC)
|
|
|
1345 printf("\t.globl \t%s\n",name);
|
|
|
1346
|
|
|
1347 printf("\t.ent \t%s\n",name);
|
|
|
1348 printf("%s_0:\n",name);
|
|
|
1349 }
|
|
|
1350
|
|
|
1351 */
|
|
|
1352 void
|
|
|
1353 enter1(int disp)
|
|
|
1354 {
|
|
|
1355 if(disp) printf("\tsubu \t$sp,$sp,%d\n",-disp+save_reg*size_of_int);
|
|
|
1356
|
|
|
1357 }
|
|
|
1358
|
|
|
1359 void
|
|
|
1360 leave(int control, char *name)
|
|
|
1361 {
|
|
|
1362 int i;
|
|
|
1363
|
|
|
1364 if (control)
|
|
|
1365 use_register(creg,REG_04,1);
|
|
|
1366 if (retcont) {
|
|
|
1367 if (control)
|
|
|
1368 jmp(retlabel);
|
|
|
1369 fwddef(retcont);
|
|
|
1370 use_register(creg,REG_04,0);
|
|
|
1371 printf("\tmove\t%s,%s\n",crn,reg_name[REG_05]);
|
|
|
1372 }
|
|
|
1373 fwddef(retlabel);
|
|
|
1374 use_register(creg,REG_04,0);
|
|
|
1375 save_reg1 = save_reg;
|
|
|
1376 printf("\tmove\t$sp,$fp\n");
|
|
|
1377
|
|
|
1378 printf("\tlw\t$31,%d($sp)\n",-disp+4*save_reg);
|
|
|
1379 save_reg--;
|
|
|
1380 for(i=save_reg;i==0;i--) {
|
|
|
1381 printf("\tlw\t$%d,%d($sp)\n",16+i,-disp+4*i);
|
|
|
1382 }
|
|
|
1383
|
|
|
1384
|
|
|
1385 if(disp) printf("\taddu \t$sp,$sp,%d\n",-disp+save_reg*size_of_int);
|
|
|
1386 printf("\tj\t$31\n");
|
|
|
1387
|
|
|
1388 local_table();
|
|
|
1389 printf("$L%d:\n",labelno);
|
|
|
1390 labelno++;
|
|
|
1391 }
|
|
|
1392
|
|
|
1393
|
|
|
1394 void
|
|
|
1395 ret(void)
|
|
|
1396 {
|
|
|
1397 use_register(creg,REG_04,1);
|
|
|
1398 jmp(retlabel);
|
|
|
1399 }
|
|
|
1400
|
|
|
1401 void
|
|
|
1402 gen_gdecl(char *n, int gpc)
|
|
|
1403 {
|
|
|
1404 /*
|
|
|
1405 if (stmode!=STATIC)
|
|
|
1406 printf(".globl %s\n",n);
|
|
|
1407 */
|
|
|
1408 }
|
|
|
1409
|
|
|
1410 void
|
|
|
1411 align(int t)
|
|
|
1412 {
|
|
|
1413 if (t!=CHAR) {
|
|
|
1414 if (data_alignment & 1)
|
|
|
1415 printf("\t.align 2\n");
|
|
|
1416 data_alignment = 0;
|
|
|
1417 }
|
|
|
1418 }
|
|
|
1419
|
|
|
1420 void
|
|
|
1421 emit_data(int e, int t, NMTBL *n)
|
|
|
1422 {
|
|
|
1423 int l;
|
|
|
1424 char *name;
|
|
|
1425 name = n->nm;
|
|
|
1426 if(mode==GDECL) { /* global */
|
|
|
1427 if (n->dsp != -1) {
|
|
|
1428 n->dsp = -1; /* initiallized flag */
|
|
|
1429 printf(".globl\t%s\n",name);
|
|
|
1430 data_mode(name);
|
|
|
1431 align(t);
|
|
|
1432 printf("%s:\n",name);
|
|
|
1433 } else {
|
|
|
1434 data_mode(0);
|
|
|
1435 }
|
|
|
1436 if(car(e)==CONST) {
|
|
|
1437 if (t==CHAR) {
|
|
|
1438 printf("\t.byte %d\n",cadr(e));
|
|
|
1439 if (data_alignment>0)
|
|
|
1440 data_alignment++;
|
|
|
1441 gpc += 1;
|
|
|
1442 } else {
|
|
|
1443 printf("\t.long %d\n",cadr(e));
|
|
|
1444 gpc += size_of_int;
|
|
|
1445 }
|
|
|
1446 } else if(t!=CHAR) {
|
|
|
1447 gpc += size_of_int;
|
|
|
1448 if(car(e)==ADDRESS&&car(cadr(e))==GVAR) {
|
|
|
1449 printf("\t.word %s\n",caddr(cadr(e)));
|
|
|
1450 } else if(car(e)==FNAME) {
|
|
|
1451 printf("\t.word %s\n",((NMTBL *)cadr(e))->nm);
|
|
|
1452 } else if(car(e)==STRING) {
|
|
|
1453 if (car(n->ty)!=ARRAY || cadr(n->ty)!=CHAR) {
|
|
|
1454 l = fwdlabel();
|
|
|
1455 printf("\t.word _%d\n",l);
|
|
|
1456 printf("$L%d:\n",l);
|
|
|
1457 output_mode = RODATA_EMIT_MODE;
|
|
|
1458 }
|
|
|
1459 ascii((char *)cadr(e));
|
|
|
1460 } else error(TYERR);
|
|
|
1461 }
|
|
|
1462 } else {
|
|
|
1463 /* if (n->sc!=LVAR) { error(TYERR); return; } */
|
|
|
1464 if(car(e)==CONST) {
|
|
|
1465 printf("\tmove\t%s,%d\n",crn,cadr(e));
|
|
|
1466 printf("\t%s\t%s,%d($fp)\n",t==CHAR?"lb":"lw",crn,n->dsp);
|
|
|
1467 } else if(t!=CHAR) {
|
|
|
1468 if(car(e)==ADDRESS&&car(cadr(e))==GVAR)
|
|
|
1469 printf("\tlw\t%s,0(%s)\n",crn,caddr(e));
|
|
|
1470 else if(car(e)==FNAME)
|
|
|
1471 printf("\tlw\t%s,0(%s)\n",crn,((NMTBL *)cadr(e))->nm);
|
|
|
1472 else if(car(e)==STRING) {
|
|
|
1473 string(e);
|
|
|
1474 } else error(TYERR);
|
|
|
1475 printf("\tlw\t%s,%d($fp)\n",crn,n->dsp);
|
|
|
1476 }
|
|
|
1477 }
|
|
|
1478 }
|
|
|
1479
|
|
|
1480 void
|
|
|
1481 emit_data_closing(NMTBL *n)
|
|
|
1482 {
|
|
|
1483 int lb;
|
|
|
1484 if (mode=GDECL) {
|
|
|
1485 data_mode(0);
|
|
|
1486 lb=fwdlabel();
|
|
|
1487 printf("$L%d:\n",lb);
|
|
|
1488 printf("\t.size\t%s,_%d-%s\n",n->nm,lb,n->nm);
|
|
|
1489 }
|
|
|
1490 }
|
|
|
1491
|
|
|
1492 void
|
|
|
1493 global_table(void)
|
|
|
1494 {
|
|
|
1495 NMTBL *n;
|
|
|
1496 for(n=ntable;n < &ntable[GSYMS];n++) {
|
|
|
1497 if (n->sc == GVAR && n->dsp != -1) {
|
|
|
1498 /* n->dsp = -1 means initialized global */
|
|
|
1499 printf("\n\t.comm \t%s,%d\n",n->nm,size(n->ty));
|
|
|
1500 }
|
|
|
1501 }
|
|
|
1502 }
|
|
|
1503
|
|
|
1504 void
|
|
|
1505 local_table(void)
|
|
|
1506 {
|
|
|
1507 NMTBL *n;
|
|
|
1508 /* static local variables */
|
|
|
1509 for(n=ntable+GSYMS;n < &ntable[GSYMS+LSYMS];n++) {
|
|
|
1510 if (n->sc == GVAR) {
|
|
|
1511 printf(".lcomm %s,%d\n",n->nm,size(n->ty));
|
|
|
1512 }
|
|
|
1513 }
|
|
|
1514 }
|
|
|
1515
|
|
|
1516 void
|
|
|
1517 text_mode(void)
|
|
|
1518 {
|
|
|
1519 if (output_mode!=TEXT_EMIT_MODE) {
|
|
|
1520 printf(".text\n");
|
|
|
1521 printf("\t.align 2\n");
|
|
|
1522 output_mode = TEXT_EMIT_MODE;
|
|
|
1523 }
|
|
|
1524 }
|
|
|
1525
|
|
|
1526 void
|
|
|
1527 data_mode(char *name)
|
|
|
1528 {
|
|
|
1529 if (output_mode!=DATA_EMIT_MODE) {
|
|
|
1530 printf(".data\n");
|
|
|
1531 output_mode = DATA_EMIT_MODE;
|
|
|
1532 }
|
|
|
1533 if (name)
|
|
|
1534 printf("\t.type\t%s,@object\n",name);
|
|
|
1535 }
|
|
|
1536
|
|
|
1537 int
|
|
|
1538 lvar(int l)
|
|
|
1539 {
|
|
|
1540 if (l<0) {
|
|
|
1541 if (fnptr->sc==CODE)
|
|
|
1542 return l+code_disp_offset;
|
|
|
1543 else
|
|
|
1544 return l+disp_offset;
|
|
|
1545 } else {
|
|
|
1546 if (fnptr->sc==CODE)
|
|
|
1547 return -l+code_arg_offset;
|
|
|
1548 else
|
|
|
1549 return l+arg_offset;
|
|
|
1550 }
|
|
|
1551 }
|
|
|
1552
|
|
|
1553 /* end */
|
