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61
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1 /* Micro-C Code Generatation Part for intel386 */
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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
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8 #define TEXT_EMIT_MODE 0
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9 #define DATA_EMIT_MODE 1
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10 #define RODATA_EMIT_MODE 2
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11
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12 static int output_mode = TEXT_EMIT_MODE;
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13 static int data_alignment = 0;
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14
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15 static int code_disp_label;
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16 static int func_disp_label;
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17
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18 /*
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19 -16 -8 local2
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20 -12 -4 local1
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21 -8 8 arg3
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22 -4 4 arg2
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23 0 0 arg1
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24 local2 -20 4 0 (%edi)
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25 local1 <-- -16 0 local variable 0 (%esi)
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26 %edi -12 <- disp_offset %ebp
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27 %esi -8
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28 %ebx -4
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29 %ebp = %esp 0
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30 %eip 4 <- arg_offset
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31 arg1 8 0
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32 arg2 12 4
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33 see enter/enter1/leave see code_enter
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34 */
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35 int arg_offset = 8;
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36 int disp_offset = -12;
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37 int func_disp_offset = -12;
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38 int code_disp_offset = 0;
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39 int jump_offset = 0;
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40
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41 int size_of_int = 4;
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42 int endian = 0;
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43 int MAX_REGISTER=6; /* intel386のレジスタを4つまで使う*/
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44 int REAL_MAX_REGISTER=8; /* intel386のレジスタが8つということ*/
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45 int MAX_DATA_REG=4;
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46 int MAX_POINTER=3;
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47 int MAX_REGISTGER_VAR=2;
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48
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49 EXTERN int creg; /* current register */
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50 EXTERN int dreg; /* temporary register */
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51 EXTERN int reg_sp; /* REGister Stack-Pointer */
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52
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53
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54 #define REG_EAX 0
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55 #define REG_EBX 1
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56 #define REG_ECX 2
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57 #define REG_EDX 3
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58 #define REG_ESI 4
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59 #define REG_EDI 5
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60 #define REG_EBP 6
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61 #define REG_ESP 7
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62
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63
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64 #define DATA_REG 0
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65 #define POINTER_REG 3
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66 static char *reg_name[8];
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67 static char *reg_name_l[4];
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68 static char *reg_name_w[4];
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69
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70 extern int creg; /* current register */
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71 extern int dreg; /* temporary register */
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72 extern int reg_sp; /* REGister Stack-Pointer */
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73
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74 #define MAX_MAX 10
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75 int rname[MAX_MAX];
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76 int regs[MAX_MAX]; /* 使われているレジスタを示すフラグ */
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77 int reg_stack[MAX_MAX]; /* 実際のレジスタの領域 */
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78 int regv[MAX_MAX]; /* 値が入っているかどうか */
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79
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80
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81 void use_register(int virt, int real, int move);
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82 void code_preinc(int e1,int e2) ;
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83 void code_cmp_register(int e2) ;
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84 void code_assign_gvar(int e2,int byte) ;
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85 void tosop(int op,int oreg);
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86 void edx_cleanup();
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87 void shift(char *op, int reg);
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88 void ld_indexx(int byte, int n, int xreg);
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89 void jmp(int l);
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90 void local_table(void);
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91 void text_mode(void);
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92 void data_mode(char *name);
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93
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94 char *register_name(int i,int byte);
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95 int register_var(int r);
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96 int get_register_var(void);
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97 void emit_push(void);
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98 int emit_pop(int type);
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99 void code_crlvar(int e2);
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100 void code_preinc(int e1,int e2);
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101 void code_postinc(int e1,int e2);
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102 void code_bool(int e1);
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103 void string(int e1);
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104 void emit_copy(int from,int to,int length,int offset,int value,int det);
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105 int struct_push(int e4,int t);
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106 void function(int e1);
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107 void code_assop(int op,int byte);
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108 int edx_setup();
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66
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109 void code_opening(char *filename);
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110 void code_closing();
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61
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111 void code_leave(char *name);
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112 int lvar(int l);
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113
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114 void
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115 code_init(void)
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116 {
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117 arg_offset = 8;
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118 func_disp_offset = -12;
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119 disp_offset = -12;
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120 size_of_int = 4;
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121 endian = 0;
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122 MAX_REGISTER=6;
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123 MAX_DATA_REG=4;
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124 MAX_POINTER=3;
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125 MAX_REGISTER_VAR=2;
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126
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127 reg_name[REG_EAX] = "%eax";
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128 reg_name[REG_EBX] = "%ebx";
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129 reg_name[REG_ECX] = "%ecx";
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130 reg_name[REG_EDX] = "%edx";
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131 reg_name[REG_ESI] = "%esi";
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132 reg_name[REG_EDI] = "%edi";
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133 reg_name[REG_EBP] = "%ebp";
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134 reg_name[REG_ESP] = "%esp";
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135 reg_name_l[REG_EAX] = "%al";
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136 reg_name_l[REG_EBX] = "%bl";
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137 reg_name_l[REG_ECX] = "%cl";
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138 reg_name_l[REG_EDX] = "%dl";
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139 reg_name_w[REG_EAX] = "%ax";
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140 reg_name_w[REG_EBX] = "%bx";
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141 reg_name_w[REG_ECX] = "%cx";
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142 reg_name_w[REG_EDX] = "%dx";
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143
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144 }
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145
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146 char *
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147 register_name(int i,int byte)
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148 {
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149 if (i<0) {
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150 error(REG_ERR);
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151 return "%eax";
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152 }
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153 if (byte && rname[i] <= REG_EDX) {
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154 return reg_name_l[rname[i]];
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155 } else {
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156 return reg_name[rname[i]]; /* should be error */
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157 }
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158 }
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159
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160 extern int creg_regvar;
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161
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162 void
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163 gexpr_code_init(void){
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164 use_register(creg,REG_EAX,0);
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165 regv[dreg]=0;
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166 creg_regvar = -1;
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167 }
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168
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169 int
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170 register_var(int r) {
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171 return virtual(r+REG_ESI);
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172 }
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173
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174 int
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175 get_register_var(void)
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176 {
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177 int i;
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178 for(i=REG_ESI;i<REG_ESP;i++) {
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179 if (! regs[i]) { /* 使われていないなら */
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180 regs[i]=1; /* そのレジスタを使うことを宣言し */
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181 regv[i]=0;
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182 return i; /* その場所を表す番号を返す */
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183 }
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184 }
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185 return -1;
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186 }
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187
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188 void
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189 use_register(int virt, int real, int move)
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190 {
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191 int real_v;
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192 char *move_op;
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193 if (rname[virt]==real)
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194 return;
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195 real_v = virtual(real);
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196 move_op = regs[real_v]?"\txchg %s,%s\n":"\tmovl %s,%s\n";
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197 if (move || (regv[real_v])) {
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198 printf(move_op,reg_name[rname[virt]],reg_name[real]);
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199 }
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200 rname[real_v] = rname[virt];
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201 rname[virt] = real;
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202 }
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203
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204 void
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205 use_pointer(int virt, int move)
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206 {
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207 int i;
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208 if (rname[virt]>=POINTER_REG)
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209 return;
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210 for(i=POINTER_REG;i<MAX_REGISTER;i++) {
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211 if (!regs[virtual(i)]) {
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212 use_register(virt,i,move);
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213 return;
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214 }
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215 }
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216 /* we prefer EBX */
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217 use_register(virt,REG_EBX,move);
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218 }
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219
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220 void
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221 use_data_reg(int virt, int move)
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222 {
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223 int i;
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224 if (rname[virt]<MAX_DATA_REG)
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225 return;
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226 for(i=0;i<MAX_DATA_REG;i++) {
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227 if (!regs[virtual(i)]) {
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228 use_register(virt,i,move);
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229 return;
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230 }
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231 }
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232 /* we prefer EBX */
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233 use_register(virt,REG_EBX,move);
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234 }
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235
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236
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237 void
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238 emit_push(void)
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239 {
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240 int new_reg;
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241 new_reg = get_register();
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242 if(new_reg<0) { /* もうレジスタがない */
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243 reg_stack[reg_sp++] = -1;
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244 printf("\tpushl %s\n",register_name(creg,0));
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245 /* creg is used soon, don't regv[creg]=0 */
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246 } else {
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247 reg_stack[reg_sp++] = creg; /* push するかわりにレジスタを使う */
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248 creg = new_reg;
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249 regv[creg]=1;
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250 }
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251 }
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252
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253 int
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254 emit_pop(int type)
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255 {
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256 int xreg;
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257 if ((xreg=pop_register())==-1) {
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258 if (type==POINTER_REG)
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259 use_pointer(dreg,0);
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260 else if (type==DATA_REG)
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261 use_data_reg(dreg,0);
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262 if (regv[dreg]) {
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263 printf("# emit_pop dreg conflict\n");
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264 }
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265 printf("\tpopl %s\n",register_name(dreg,0));
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266 xreg = dreg;
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267 regv[xreg]=1;
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268 }
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269 return xreg;
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270 }
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271
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272
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273 void
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274 code_gvar(int e1) {
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275 printf("\tmovl $%s,%s\n",(char *)caddr(e1),register_name(creg,0));
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276 }
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277
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278
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279 void
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280 code_rgvar(int e1) {
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281 printf("\tmovl %s,%s\n",(char *)caddr(e1),register_name(creg,0));
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282 }
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283
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284 void
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285 code_crgvar(e1){
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286 printf("\tmovsbl %s,%s\n",(char *)caddr(e1),register_name(creg,0));
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287 }
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288
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289
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290 void
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291 code_lvar(int e2) {
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292 printf("\tlea %d(%%ebp),%s\n",e2,register_name(creg,0));
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293 }
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294
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295
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296 void
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297 code_register(int e2) {
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298 printf("\tmovl %s,%s\n",register_name(e2,0),register_name(creg,0));
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299 }
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300
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301
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302 void
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303 code_rlvar(int e2) {
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304 printf("\tmovl %d(%%ebp),%s\n",e2,register_name(creg,0));
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305 }
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306
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307
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308 void
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309 code_crlvar(int e2) {
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62
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310 printf("\tmovsbl %d(%%ebp),%s\n",e2,register_name(creg,0));
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61
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311 }
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312
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313
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314 void
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315 code_fname(char *e2) {
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316 printf("\tmovl $%s,%s\n",e2,register_name(creg,0));
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317 }
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318
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319
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320 void
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321 code_const(int e2) {
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322 printf("\tmovl $%d,%s\n",e2,register_name(creg,0));
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323 }
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324
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325
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326 void
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327 code_neg() {
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328 printf("\tnegl %s\n", register_name(creg,0));
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329 }
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330
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331
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332 void
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333 code_not() {
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334 printf("\tnotl %s\n", register_name(creg,0));
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335 }
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336
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337
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338 void
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339 code_lnot() {
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340 char *xrn;
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341 use_data_reg(creg,1);
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342 xrn = register_name(creg,1);
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343 printf("\tcmpl $0,%s\n", register_name(creg,0));
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344 printf("\tsete %s\n", xrn);
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345 printf("\tmovzbl %s,%s\n", xrn,register_name(creg,0));
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346 }
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347
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348 void
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349 code_preinc(int e1,int e2) {
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350 char *xrn;
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351 if (car(e2)==REGISTER) {
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352 printf("\taddl $%d,%s\n",caddr(e1),register_name(cadr(e2),0));
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353 printf("\tmovl %s,%s\n",register_name(cadr(e2),0),register_name(creg,0));
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354 return;
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355 }
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356 g_expr(e2);
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357 xrn = register_name(creg,0);
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358 printf("\taddl $%d,(%s)\n",caddr(e1),xrn);
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359 printf("\tmovl (%s),%s\n",xrn,xrn);
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360 }
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361
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362
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363 void
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364 code_postinc(int e1,int e2) {
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365 char *xrn;
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366 if (car(e2)==REGISTER) {
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367 printf("\tmovl %s,%s\n",register_name(cadr(e2),0),register_name(creg,0));
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368 printf("\taddl $%d,%s\n",caddr(e1),register_name(cadr(e2),0));
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369 return;
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370 }
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371 g_expr(e2);
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372 emit_push();
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373 xrn = register_name((e2=emit_pop(0)),0);
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374 printf("\tmovl (%s),%s\n",xrn,register_name(creg,0));
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375 printf("\taddl $%d,(%s)\n",caddr(e1),xrn);
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376 emit_pop_free(e2);
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377 }
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378
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379
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380 void
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381 code_cpostinc(int e1,int e2) {
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382 char *xrn;
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383 if (car(e2)==REGISTER) {
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384 printf("\tmovl %s,%s\n",register_name(cadr(e2),0),register_name(creg,0));
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385 printf("\taddl $%d,%s\n",caddr(e1),register_name(cadr(e2),0));
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386 return;
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387 }
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388 g_expr(e2);
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389 emit_push();
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390 xrn = register_name((e2=emit_pop(0)),1);
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391 printf("\tmovsbl (%s),%s\n",xrn,register_name(creg,0));
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392 printf("\tincl (%s)\n",xrn);
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393 emit_pop_free(e2);
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394 }
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395
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396
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397 void
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398 code_cpreinc(int e1,int e2) {
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399 if (car(e2)==REGISTER) {
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400 printf("\taddl $%d,%s\n",caddr(e1),register_name(cadr(e2),0));
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401 printf("\tmovl %s,%s\n",register_name(cadr(e2),0),register_name(creg,0));
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402 return;
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403 }
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404 g_expr(e2);
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405 printf("\tincl (%s)\n",register_name(creg,0));
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406 printf("\tmovsbl (%s),%s\n",register_name(creg,0),register_name(creg,0));
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407 }
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408
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409
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410 void
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411 code_cpostdec(int e1,int e2) {
|
|
|
412 if (car(e2)==REGISTER) {
|
|
|
413 printf("\tmovl %s,%s\n",register_name(cadr(e2),0),register_name(creg,0));
|
|
|
414 printf("\tdecl %s\n",register_name(cadr(e2),0));
|
|
|
415 return;
|
|
|
416 }
|
|
|
417 g_expr(e2);
|
|
|
418 printf("\tmovsbl (%s),%s\n",register_name(creg,0),register_name(creg,0));
|
|
|
419 printf("\tdecl (%s)\n",register_name(creg,0));
|
|
|
420 }
|
|
|
421
|
|
|
422
|
|
|
423 void
|
|
|
424 code_cpredec(int e1,int e2) {
|
|
|
425 if (car(e2)==REGISTER) {
|
|
|
426 printf("\tdecl %s\n",register_name(cadr(e2),0));
|
|
|
427 printf("\tmovl %s,%s\n",register_name(cadr(e2),0),register_name(creg,0));
|
|
|
428 return;
|
|
|
429 }
|
|
|
430 g_expr(e2);
|
|
|
431 emit_push();
|
|
|
432 e2 = emit_pop(0);
|
|
|
433 printf("\tdecl (%s)\n",register_name(e2,0));
|
|
|
434 printf("\tmovsbl (%s),%s\n",register_name(e2,0),register_name(creg,0));
|
|
|
435 emit_pop_free(e2);
|
|
|
436 }
|
|
|
437
|
|
|
438
|
|
|
439 void
|
|
|
440 code_return() {
|
|
|
441 printf("\tleal _%d,%s\n",retcont,register_name(creg,0));
|
|
|
442 }
|
|
|
443
|
|
|
444
|
|
|
445 void
|
|
|
446 code_environment() {
|
|
|
447 printf("\tmovl %%ebp,%s\n",register_name(creg,0));
|
|
|
448 }
|
|
|
449
|
|
|
450
|
|
|
451 void
|
|
|
452 code_bool(int e1) {
|
|
|
453 char *xrn;
|
|
|
454 int e2,e3;
|
|
|
455 b_expr(e1,1,e2=fwdlabel(),1); /* including > < ... */
|
|
|
456 xrn = register_name(creg,0);
|
|
|
457 printf("\txorl %s,%s\n",xrn,xrn);
|
|
|
458 jmp(e3=fwdlabel());
|
|
|
459 fwddef(e2);
|
|
|
460 printf("\tmovl $1,%s\n",xrn);
|
|
|
461 fwddef(e3);
|
|
|
462 }
|
|
|
463
|
|
|
464 char *
|
|
|
465 code_gt(int cond) {
|
|
|
466 return (cond?"g":"le");
|
|
|
467 }
|
|
|
468
|
|
|
469 char *
|
|
|
470 code_ugt(int cond) {
|
|
|
471 return (cond?"a":"be");
|
|
|
472 }
|
|
|
473
|
|
|
474 char *
|
|
|
475 code_ge(int cond) {
|
|
|
476 return (cond?"ge":"l");
|
|
|
477 }
|
|
|
478
|
|
|
479 char *
|
|
|
480 code_uge(int cond) {
|
|
|
481 return (cond?"ae":"b");
|
|
|
482 }
|
|
|
483
|
|
|
484 char *
|
|
|
485 code_eq(int cond) {
|
|
|
486 return (cond?"e":"ne");
|
|
|
487 }
|
|
|
488
|
|
|
489 void
|
|
|
490 code_cmp_crgvar(int e1) {
|
|
|
491 printf("\tcmpb $0,%s\n",(char *)caddr(e1));
|
|
|
492 }
|
|
|
493
|
|
|
494
|
|
|
495 void
|
|
|
496 code_cmp_crlvar(int e1) {
|
|
|
497 printf("\tcmpb $0,%d(%%ebp)\n",e1);
|
|
|
498 }
|
|
|
499
|
|
|
500
|
|
|
501 void
|
|
|
502 code_cmp_rgvar(int e1) {
|
|
|
503 printf("\tcmpl $0,%s\n",(char *)caddr(e1));
|
|
|
504 }
|
|
|
505
|
|
|
506
|
|
|
507 void
|
|
|
508 code_cmp_rlvar(int e1) {
|
|
|
509 printf("\tcmpl $0,%d(%%ebp)\n",e1);
|
|
|
510 }
|
|
|
511
|
|
|
512
|
|
|
513 void
|
|
|
514 code_cmp_register(int e2) {
|
|
|
515 printf("\tcmpl $0,%s\n",register_name(e2,0));
|
|
|
516 }
|
|
|
517
|
|
|
518
|
|
|
519 void
|
|
|
520 ascii(char *s)
|
|
|
521 {
|
|
|
522 printf("\t.string \"");
|
|
|
523 while(*s) {
|
|
|
524 if (*s=='\n')
|
|
|
525 printf("%cn",92);
|
|
|
526 else if (*s<' ')
|
|
|
527 printf("%c%03o",92,*s);
|
|
|
528 else if (*s==34)
|
|
|
529 printf("%c%c",92,34);
|
|
|
530 else
|
|
|
531 printf("%c",*s);
|
|
|
532 s++;
|
|
|
533 }
|
|
|
534 printf("%c\n",34);
|
|
|
535 }
|
|
|
536
|
|
|
537 void
|
|
|
538 string(int e1)
|
|
|
539 {
|
|
|
540 char *s;
|
|
|
541 int i,lb;
|
|
|
542
|
|
|
543 if (0) {
|
|
|
544 s=(char *)cadr(e1);
|
|
|
545 lb=fwdlabel();
|
|
|
546 printf("\tjmp _%d\n",lb);
|
|
|
547 i=backdef();
|
|
|
548 ascii(s);
|
|
|
549 printf("\t.align 2\n");
|
|
|
550 fwddef(lb);
|
|
|
551 printf("\tlea _%d,%s\n",i,register_name(creg,0));
|
|
|
552 } else {
|
|
|
553 s=(char *)cadr(e1);
|
|
|
554 printf(".section\t.rodata\n");
|
|
|
555 lb=fwdlabel();
|
|
|
556 printf("_%d:\n",lb);
|
|
|
557 ascii(s);
|
|
|
558 if (output_mode==TEXT_EMIT_MODE) {
|
|
|
559 printf(".text\n");
|
|
|
560 } else {
|
|
|
561 text_mode();
|
|
|
562 }
|
|
|
563 printf("\tlea _%d,%s\n",lb,register_name(creg,0));
|
|
|
564 }
|
|
|
565 }
|
|
|
566
|
|
|
567 #define MAX_COPY_LEN 20
|
|
|
568
|
|
|
569 void
|
|
|
570 emit_copy(int from,int to,int length,int offset,int value,int det)
|
|
|
571 {
|
|
|
572 int fix = 0;
|
|
|
573 /* length <0 means upward direction copy */
|
|
|
574 switch (length) {
|
|
|
575 case 0: break;
|
|
|
576 case 1: case -1:
|
|
|
577 printf("\tmovb %d(%s),%s\n",offset,
|
|
|
578 register_name(from,0), reg_name_l[rname[dreg]] );
|
|
|
579 printf("\tmovb %s,%d(%s)\n",reg_name_l[rname[dreg]] ,offset,
|
|
|
580 register_name(to,0));
|
|
|
581 break;
|
|
|
582 case 2: case -2:
|
|
|
583 printf("\tmovw %d(%s),%s\n",offset,
|
|
|
584 register_name(from,0), reg_name_w[rname[dreg]] );
|
|
|
585 printf("\tmovw %s,%d(%s)\n",reg_name_w[rname[dreg]] ,offset,
|
|
|
586 register_name(to,0));
|
|
|
587 break;
|
|
|
588 case 4: case -4:
|
|
|
589 printf("\tmovl %d(%s),%s\n",offset,
|
|
|
590 register_name(from,0), register_name(dreg,0));
|
|
|
591 printf("\tmovl %s,%d(%s)\n",register_name(dreg,0), offset,
|
|
|
592 register_name(to,0));
|
|
|
593 break;
|
|
|
594 default:
|
|
|
595 if (-MAX_COPY_LEN<length && length <0) {
|
|
|
596 for(;length<=4;length+=4,offset-=4)
|
|
|
597 emit_copy(from,to,4,offset,0,det);
|
|
|
598 for(;length<=2;length+=2,offset-=2)
|
|
|
599 emit_copy(from,to,2,offset,0,det);
|
|
|
600 if(length>0)
|
|
|
601 emit_copy(from,to,length,offset,0,det);
|
|
|
602 break;
|
|
|
603 } else if (length <=MAX_COPY_LEN) {
|
|
|
604 for(;length>=4;length-=4,offset+=4)
|
|
|
605 emit_copy(from,to,4,offset,0,det);
|
|
|
606 for(;length>=2;length-=2,offset+=2)
|
|
|
607 emit_copy(from,to,2,offset,0,det);
|
|
|
608 if(length>0)
|
|
|
609 emit_copy(from,to,length,offset,0,det);
|
|
|
610 break;
|
|
|
611 }
|
|
|
612 if (det) {
|
|
|
613 /*
|
|
|
614 call bcopy
|
|
|
615 g_expr(list3(FUNCTION,,);
|
|
|
616 break;
|
|
|
617 */
|
|
|
618 }
|
|
|
619 use_register(from,REG_ESI,1);
|
|
|
620 use_register(to, REG_EDI,1);
|
|
|
621 use_register(dreg,REG_ECX,0);
|
|
|
622 if (length<0) {
|
|
|
623 printf("\tmovl $%d,%%ecx\n",-length/4);
|
|
|
624 printf("\taddl $%d,%%esi\n",-length);
|
|
|
625 printf("\taddl $%d,%%edi\n",-length);
|
|
|
626 printf("\tstd\n\trep\n\tmovsl\n");
|
|
|
627 if(length%4) {
|
|
|
628 emit_copy(from,to,length,offset+length/4,0,det);
|
|
|
629 }
|
|
|
630 } else {
|
|
|
631 printf("\tmovl $%d,%%ecx\n",length/4);
|
|
|
632 fix = (length/4)*4;
|
|
|
633 printf("\tcld\n\trep\n\tmovsl\n");
|
|
|
634 if(length%4) {
|
|
|
635 emit_copy(from,to,length,offset+length/4,0,det);
|
|
|
636 }
|
|
|
637 }
|
|
|
638 }
|
|
|
639 if (value) {
|
|
|
640 /* creg must point top of the destination data */
|
|
|
641 /* this code is necessary for the value of assignment or function call */
|
|
|
642 /* otherwise we don't need this */
|
|
|
643 if (fix) printf("\tsubl $%d,%s\n",fix,register_name(to,0));
|
|
|
644 if(creg!=to) {
|
|
|
645 if (to==dreg)
|
|
|
646 printf("\tmovl %s,%s\n",register_name(to,0),register_name(creg,0));
|
|
|
647 else {
|
|
|
648 free_register(creg); creg=to;
|
|
|
649 }
|
|
|
650 }
|
|
|
651 }
|
|
|
652 regv[from]=regv[to]=regv[dreg]=0;
|
|
|
653 regv[creg]=1;
|
|
|
654 }
|
|
|
655
|
|
|
656 int
|
|
|
657 struct_push(int e4,int t)
|
|
|
658 {
|
|
|
659 int length,xreg,save,lreg;
|
|
|
660 g_expr(e4);
|
|
|
661 length=size(t);
|
|
|
662 if(length%size_of_int) {
|
|
|
663 length += size_of_int - (length%size_of_int);
|
|
|
664 }
|
|
|
665 if (length==4) {
|
|
|
666 printf("\tpushl (%s)\n",register_name(creg,0)); return 1;
|
|
|
667 }
|
|
|
668 if (length==8) {
|
|
|
669 printf("\tpushl 4(%s)\n",register_name(creg,0));
|
|
|
670 printf("\tpushl (%s)\n",register_name(creg,0)); return 2;
|
|
|
671 }
|
|
|
672 printf("\tsubl $%d,%%esp\n",length);
|
|
|
673 if (register_full()) {
|
|
|
674 save = 1;
|
|
|
675 for(lreg=0;lreg==creg||lreg==dreg;lreg++);
|
|
|
676 printf("\tpushl %s\n",register_name(lreg,0));
|
|
|
677 xreg = lreg; regv[xreg]=0;
|
|
|
678 } else {
|
|
|
679 save=0;
|
|
|
680 xreg = get_register();
|
|
|
681 }
|
|
|
682 if (save)
|
|
|
683 printf("\tlea %d(%%esp),%s\n",size_of_int,register_name(xreg,0));
|
|
|
684 else
|
|
|
685 printf("\tmovl %%esp,%s\n",register_name(xreg,0));
|
|
|
686 regv[xreg]=1;
|
|
|
687 /* downward direction copy */
|
|
|
688 emit_copy(creg,xreg,length,0,0,1);
|
|
|
689 /* we have value in creg, it may be changed */
|
|
|
690 if (save) {
|
|
|
691 if(creg==xreg) {
|
|
|
692 creg = get_register(); /* creg is freed in emit_copy */
|
|
|
693 }
|
|
|
694 printf("\tpopl %s\n",register_name(xreg,0));
|
|
|
695 regv[xreg]=1;
|
|
|
696 } else
|
|
|
697 free_register(xreg);
|
|
|
698 return length/size_of_int;
|
|
|
699 }
|
|
|
700
|
|
|
701 void
|
|
|
702 function(int e1)
|
|
|
703 {
|
|
|
704 int e2,e3,e4,e5,nargs,t;
|
|
|
705 NMTBL *n;
|
|
|
706 int save,saved;
|
|
|
707 if (free_register_count()<1) {
|
|
|
708 for(save = 0;save==dreg||save==creg;save++);
|
|
|
709 printf("\tpushl %s\n",register_name(save,0));
|
|
|
710 saved = 1;
|
|
|
711 } else {
|
|
|
712 save = get_register();
|
|
|
713 saved = 0;
|
|
|
714 }
|
|
|
715 regv[save]=0;
|
|
|
716 e2 = cadr(e1);
|
|
|
717 nargs = 0;
|
|
|
718 for (e3 = caddr(e1); e3; e3 = cadr(e3)) {
|
|
|
719 t=caddr(e3);
|
|
|
720 n=(NMTBL *)(e5=(cadr(e4 = car(e3))));
|
|
|
721 if(scalar(t)) {
|
|
|
722 g_expr(e4);
|
|
|
723 printf("\tpushl %s\n",register_name(creg,0));
|
|
|
724 } else if (car(t)==STRUCT||car(t)==UNION) {
|
|
|
725 nargs += struct_push(e4,t);
|
|
|
726 continue;
|
|
|
727 } else {
|
|
|
728 error(TYERR);
|
|
|
729 }
|
|
|
730 ++nargs;
|
|
|
731 }
|
|
|
732 if (car(e2) == FNAME) {
|
|
|
733 n=(NMTBL *)cadr(e2);
|
|
|
734 } else {
|
|
|
735 use_register(creg,REG_EAX,0);
|
|
|
736 g_expr(e2);
|
|
|
737 }
|
|
|
738
|
|
|
739 /* we don't have to save creg nor dreg */
|
|
|
740 regs[creg]=0; regs[dreg]=0;
|
|
|
741 regv[creg]= regv[dreg]= regv[save]= 0;
|
|
|
742 use_register(creg,REG_EAX,0);
|
|
|
743 use_register(dreg,REG_EDX,0); /* will be destroyed */
|
|
|
744 use_register(save,REG_ECX,0); /* will be destroyed */
|
|
|
745 regs[creg]=1; regs[dreg]=1;
|
|
|
746
|
|
|
747 if (car(e2) == FNAME) {
|
|
|
748 printf("\tcall\t%s\n",n->nm);
|
|
|
749 } else {
|
|
|
750 printf("\tcall\t*%s\n",register_name(creg,0));
|
|
|
751 }
|
|
|
752 if (nargs) printf("\taddl $%d,%%esp\n",size_of_int*nargs);
|
|
|
753 if (saved) {
|
|
|
754 printf("\tpopl %s\n",register_name(save,0));
|
|
|
755 } else {
|
|
|
756 free_register(save);
|
|
|
757 }
|
|
|
758 regv[save]=0;
|
|
|
759 regv[creg]=1;
|
|
|
760 }
|
|
|
761
|
|
|
762 void
|
|
|
763 code_frame_pointer(int e3) {
|
|
|
764 printf("\tmovl %s,%%ebp\n",register_name(e3,0));
|
|
|
765 }
|
|
|
766
|
|
|
767
|
|
|
768 void
|
|
62
|
769 code_fix_frame_pointer(int disp_offset) {
|
|
61
|
770 printf("\tlea %d(%%ebp),%%ebp\n",disp_offset);
|
|
|
771 }
|
|
|
772
|
|
|
773
|
|
|
774 void
|
|
|
775 code_jmp(char *s) {
|
|
|
776 printf("\tjmp %s\n",s);
|
|
|
777 }
|
|
|
778
|
|
|
779
|
|
|
780 void
|
|
|
781 code_indirect_jmp(int e2) {
|
|
|
782 printf("\tjmp *%s\n",register_name(e2,0));
|
|
|
783 }
|
|
|
784
|
|
|
785 void
|
|
|
786 rindirect(int e1) /* *(p +5 ) */
|
|
|
787 {
|
|
|
788 char *op;
|
|
|
789 int e2,e3,byte;
|
|
|
790
|
|
|
791 op = ((byte = (car(e1) == CRINDIRECT)) ? "movsbl" : "movl");
|
|
|
792 e3 = cadr(e2 = cadr(e1));
|
|
|
793 g_expr(e2);
|
|
|
794 printf("\t%s (%s),%s\n",op,register_name(creg,0),register_name(creg,0));
|
|
|
795 }
|
|
|
796
|
|
|
797 char *
|
|
|
798 move(int byte)
|
|
|
799 {
|
|
|
800 return byte?"movb":"movl";
|
|
|
801 }
|
|
|
802
|
|
|
803 void
|
|
|
804 code_assign_gvar(int e2,int byte) {
|
|
|
805 if (byte) use_data_reg(creg,1);
|
|
|
806 printf("\t%s %s,%s\n",move(byte),register_name(creg,byte),(char *)caddr(e2));
|
|
|
807 }
|
|
|
808
|
|
|
809 void
|
|
|
810 code_assign_lvar(int e2,int byte) {
|
|
|
811 if (byte) use_data_reg(creg,1);
|
|
|
812 printf("\t%s %s,%d(%%ebp)\n",move(byte),register_name(creg,byte),e2);
|
|
|
813 }
|
|
|
814
|
|
|
815 void
|
|
|
816 code_assign_register(int e2,int byte) {
|
|
|
817 printf("\tmovl %s,%s\n",register_name(creg,0),register_name(e2,0));
|
|
|
818 }
|
|
|
819
|
|
|
820 void
|
|
|
821 code_assign(int e2,int byte) {
|
|
|
822 printf("\t%s %s,(%s)\n",move(byte),register_name(creg,byte),register_name(e2,0));
|
|
|
823 }
|
|
|
824
|
|
|
825
|
|
|
826 void
|
|
|
827 code_register_assop(int e2,int op,int byte) {
|
|
|
828 int reg;
|
|
|
829 int xreg = creg;
|
|
|
830 creg = reg = e2;
|
|
|
831 tosop(op,xreg);
|
|
|
832 creg = xreg;
|
|
|
833 printf("\tmovl %s,%s\n",register_name(reg,0),register_name(creg,0));
|
|
|
834 }
|
|
|
835
|
|
|
836
|
|
|
837 void
|
|
|
838 code_assop(int op,int byte) {
|
|
|
839 char *xrn;
|
|
|
840 int xreg;
|
|
|
841 int edx = edx_setup();
|
|
|
842 xrn = register_name(xreg = emit_pop(0),0); /* pop e3 value */
|
|
|
843 regv[xreg]=regs[xreg]=1;
|
|
|
844 printf("\tmovl %s,%s # assop \n",register_name(creg,0),register_name(edx,0));
|
|
|
845 regv[edx]=1;
|
|
|
846 ld_indexx(byte,0,edx);
|
|
|
847 tosop(op,xreg);
|
|
|
848 printf("\t%s %s,(%s)\n",byte ? "movb" : "movl",register_name(creg,byte),register_name(edx,0));
|
|
|
849 edx_cleanup();
|
|
|
850 emit_pop_free(xreg);
|
|
|
851 }
|
|
|
852
|
|
|
853
|
|
|
854 void
|
|
|
855 tosop(int op,int oreg)
|
|
|
856 {
|
|
|
857 int dx;
|
|
|
858 char *orn,*crn;
|
|
|
859
|
|
|
860 switch(op) {
|
|
|
861 case LSHIFT:
|
|
|
862 case ULSHIFT:
|
|
|
863 shift("sall",oreg);
|
|
|
864 return;
|
|
|
865 case RSHIFT:
|
|
|
866 shift("sarl",oreg);
|
|
|
867 return;
|
|
|
868 case URSHIFT:
|
|
|
869 shift("shrl",oreg);
|
|
|
870 return;
|
|
|
871 }
|
|
|
872 if(oreg==-1) {
|
|
|
873 printf("\tpopl %s\n",register_name(dreg,0));
|
|
|
874 oreg = dreg;
|
|
|
875 regv[dreg]=1;
|
|
|
876 }
|
|
|
877 regv[oreg]=1; regs[oreg]=1;
|
|
|
878 orn = register_name(oreg,0);
|
|
|
879 crn = register_name(creg,0);
|
|
|
880 switch(op) {
|
|
|
881 case ADD:
|
|
|
882 printf("\taddl %s,%s\n",orn,crn);
|
|
|
883 break;
|
|
|
884 case SUB:
|
|
|
885 printf("\tsubl %s,%s\n",orn,crn);
|
|
|
886 break;
|
|
|
887 case BAND:
|
|
|
888 printf("\tandl %s,%s\n",orn,crn);
|
|
|
889 break;
|
|
|
890 case EOR:
|
|
|
891 printf("\txorl %s,%s\n",orn,crn);
|
|
|
892 break;
|
|
|
893 case BOR:
|
|
|
894 printf("\torl %s,%s\n",orn,crn);
|
|
|
895 break;
|
|
|
896 case MUL:
|
|
|
897 case UMUL:
|
|
|
898 printf("\t%s %s,%s\n","imull",orn,crn);
|
|
|
899 break;
|
|
|
900 case DIV:
|
|
|
901 case UDIV:
|
|
|
902 use_register(creg,REG_EAX,1);
|
|
|
903 edx_setup();
|
|
|
904 orn = register_name(oreg,0);
|
|
|
905 if (op==DIV)
|
|
|
906 printf("\tcltd\n\tdivl %s\n",orn);
|
|
|
907 else
|
|
|
908 printf("\txor %%edx,%%edx\n\tidivl %s\n",orn);
|
|
|
909 edx_cleanup();
|
|
|
910 break;
|
|
|
911 case MOD:
|
|
|
912 case UMOD:
|
|
|
913 use_register(creg,REG_EAX,1);
|
|
|
914 edx_setup();
|
|
|
915 orn = register_name(oreg,0);
|
|
|
916 if (op==DIV)
|
|
|
917 printf("\tcltd\n\tdivl %s\n",orn);
|
|
|
918 else
|
|
|
919 printf("\txor %%edx,%%edx\n\tidivl %s\n",orn);
|
|
|
920 dx = virtual(REG_EDX);
|
|
|
921 if (dx!=creg) {
|
|
|
922 rname[dx]=rname[creg];
|
|
|
923 rname[creg]=REG_EDX;
|
|
|
924 }
|
|
|
925 edx_cleanup();
|
|
|
926 break;
|
|
|
927 }
|
|
|
928 if (oreg!=dreg&&oreg>=0)
|
|
|
929 free_register(oreg);
|
|
|
930 }
|
|
|
931
|
|
|
932 static int edx_stack=0;
|
|
|
933
|
|
|
934 int
|
|
|
935 edx_setup()
|
|
|
936 {
|
|
|
937 int edx_save;
|
|
|
938 /* make real EDX register empty */
|
|
|
939 if (free_register_count()<1) {
|
|
|
940 for(edx_save = 0;edx_save==dreg||edx_save==creg;edx_save++);
|
|
|
941 printf("\tpushl %s\n",register_name(edx_save,0));
|
|
|
942 edx_stack = list3(edx_save,edx_stack,0);
|
|
|
943 } else {
|
|
|
944 edx_save = get_register();
|
|
|
945 edx_stack = list3(edx_save,edx_stack,1);
|
|
|
946 }
|
|
|
947 regv[edx_save]=0;
|
|
|
948 use_register(edx_save,REG_EDX,0);
|
|
|
949 return edx_save;
|
|
|
950 }
|
|
|
951
|
|
|
952
|
|
|
953 void
|
|
|
954 edx_cleanup()
|
|
|
955 {
|
|
|
956 if (caddr(edx_stack)==0) {
|
|
|
957 printf("\tpopl %s\n",register_name(car(edx_stack),0));
|
|
|
958 } else
|
|
|
959 free_register(car(edx_stack));
|
|
|
960 edx_stack = cadr(edx_stack);
|
|
|
961 }
|
|
|
962
|
|
|
963 void
|
|
|
964 shift(char *op, int reg)
|
|
|
965 {
|
|
|
966 if (reg>=0) {
|
|
|
967 use_register(reg,REG_ECX,1);
|
|
|
968 } else {
|
|
|
969 use_register(dreg,REG_ECX,0);
|
|
|
970 printf("\tpopl %%ecx\n");
|
|
|
971 }
|
|
|
972 printf("\t%s %%cl,%s\n",op,register_name(creg,0));
|
|
|
973 }
|
|
|
974
|
|
|
975 void
|
|
|
976 ld_indexx(int byte, int n, int xreg)
|
|
|
977 {
|
|
|
978 char *op;
|
|
|
979
|
|
|
980 op = byte ? "movsbl" : "movl";
|
|
|
981 if (n)
|
|
|
982 printf("\t%s %d(%s),%s\n",op,n,register_name(xreg,0),register_name(creg,byte));
|
|
|
983 else
|
|
|
984 printf("\t%s (%s),%s\n",op,register_name(xreg,0),register_name(creg,byte));
|
|
|
985 }
|
|
|
986
|
|
|
987 void
|
|
|
988 cmpdimm(int e, int csreg)
|
|
|
989 {
|
|
|
990 /* used in dosiwtch() */
|
|
66
|
991 if(chk) return;
|
|
61
|
992 use_register(creg,csreg,0);
|
|
|
993 printf("\tcmpl $%d,%s\n",e,register_name(creg,0));
|
|
|
994 }
|
|
|
995
|
|
|
996 void
|
|
66
|
997 code_opening(char *filename)
|
|
61
|
998 {
|
|
|
999 printf("\t.file \"%s\"\n",filename);
|
|
|
1000 printf("\t.version\t\"01.01\"\n");
|
|
66
|
1001 /* printf("gcc2_compiled.:\n"); */
|
|
61
|
1002 printf(".text\n");
|
|
|
1003 }
|
|
|
1004
|
|
|
1005 void
|
|
66
|
1006 code_closing()
|
|
61
|
1007 {
|
|
|
1008 printf("\t.ident \"Micro-C compiled\"\n");
|
|
|
1009 }
|
|
|
1010
|
|
|
1011 void
|
|
|
1012 rexpr(int e1, int l1, char *s)
|
|
|
1013 {
|
|
|
1014 g_expr(list3(SUB,cadr(e1),caddr(e1)));
|
|
|
1015 printf("\tj%s\t_%d\n",s,l1);
|
|
|
1016 }
|
|
|
1017
|
|
|
1018 void
|
|
|
1019 jcond(int l, char cond)
|
|
|
1020 {
|
|
66
|
1021 if (chk) return;
|
|
61
|
1022 printf("\tj%s\t_%d\n",cond?"ne":"e",l);
|
|
|
1023 }
|
|
|
1024
|
|
|
1025 void
|
|
|
1026 jmp(int l)
|
|
|
1027 {
|
|
|
1028 control=0;
|
|
66
|
1029 if (chk) return;
|
|
61
|
1030 printf("\tjmp\t_%d\n",l);
|
|
|
1031 /* align? */
|
|
|
1032 /*
|
|
|
1033 this is not allowed because of ? operator
|
|
|
1034 regv[creg]=regv[dreg]=0;
|
|
|
1035 use_register(creg,REG_EAX,0);
|
|
|
1036 use_register(dreg,REG_EBX,0);
|
|
|
1037 */
|
|
|
1038 }
|
|
|
1039
|
|
|
1040 void
|
|
|
1041 gen_comment(char *s)
|
|
|
1042 {
|
|
66
|
1043 if (chk) return;
|
|
|
1044 printf("## %s",s);
|
|
61
|
1045 }
|
|
|
1046
|
|
|
1047
|
|
|
1048 void
|
|
|
1049 code_enter(char *name)
|
|
|
1050 {
|
|
|
1051 printf("\t.align 4\n");
|
|
|
1052 if (stmode!=STATIC)
|
|
|
1053 printf(".globl %s\n",name);
|
|
|
1054 printf("\t.type\t%s,@function\n",name);
|
|
|
1055 printf("%s:\n",name);
|
|
|
1056 }
|
|
|
1057
|
|
|
1058 void
|
|
|
1059 code_enter1(int args)
|
|
|
1060 {
|
|
|
1061 code_disp_label=fwdlabel();
|
|
|
1062 printf("\tlea _%d(%%ebp),%%esp\n",code_disp_label);
|
|
|
1063
|
|
|
1064 printf("## args %d disp %d code_arg_offset=%d code_disp_offset=%d\n",args,disp,code_arg_offset,code_disp_offset);
|
|
|
1065 }
|
|
|
1066
|
|
|
1067 void
|
|
|
1068 code_leave(char *name)
|
|
|
1069 {
|
|
63
|
1070 disp&= -size_of_int;
|
|
61
|
1071 printf("\t.set _%d,%d\n",code_disp_label,disp+code_disp_offset);
|
|
|
1072 printf("_%d:\n",labelno);
|
|
|
1073 printf("\t.size\t%s,_%d-%s\n",name,labelno,name);
|
|
|
1074 local_table();
|
|
|
1075 labelno++;
|
|
|
1076 free_all_register();
|
|
|
1077 }
|
|
|
1078
|
|
|
1079 void
|
|
|
1080 enter(char *name)
|
|
|
1081 {
|
|
|
1082 printf("\t.align 2\n");
|
|
|
1083 if (stmode!=STATIC)
|
|
|
1084 printf(".globl %s\n",name);
|
|
|
1085 printf("%s:\n",name);
|
|
|
1086 printf("\t.type\t%s,@function\n",name);
|
|
|
1087 printf("\tpushl %%ebp\n");
|
|
|
1088 printf("\tmovl %%esp,%%ebp\n");
|
|
|
1089 printf("\tpushl %%ebx\n");
|
|
|
1090 printf("\tpushl %%esi\n");
|
|
|
1091 printf("\tpushl %%edi\n");
|
|
|
1092 }
|
|
|
1093
|
|
|
1094 void
|
|
|
1095 enter1()
|
|
|
1096 {
|
|
|
1097 func_disp_label=fwdlabel();
|
|
|
1098 printf("\tlea _%d(%%ebp),%%esp\n",func_disp_label);
|
|
|
1099 /* if(disp) printf("\tsubl $%d,%%esp\n",-disp); */
|
|
|
1100 }
|
|
|
1101
|
|
|
1102 void
|
|
|
1103 leave(int control, char *name)
|
|
|
1104 {
|
|
|
1105 if (control)
|
|
|
1106 use_register(creg,REG_EAX,1);
|
|
|
1107 if (retcont) {
|
|
|
1108 if (control)
|
|
|
1109 jmp(retlabel);
|
|
|
1110 fwddef(retcont);
|
|
|
1111 use_register(creg,REG_EAX,0);
|
|
|
1112 printf("\tmovl %s,%s\n",reg_name[REG_ESI],register_name(creg,0));
|
|
|
1113 /* printf("\tleave\n"); */
|
|
|
1114 }
|
|
|
1115 fwddef(retlabel);
|
|
|
1116 /* use_register(creg,REG_EAX,0); too late */
|
|
|
1117 /* if(disp) printf("\taddl $%d,%%esp\n",-disp); */
|
|
63
|
1118 disp&= -size_of_int;
|
|
|
1119
|
|
61
|
1120 printf("\tlea %d(%%ebp),%%esp\n",disp_offset);
|
|
|
1121 printf("\tpopl %%edi\n");
|
|
|
1122 printf("\tpopl %%esi\n");
|
|
|
1123 printf("\tpopl %%ebx\n");
|
|
|
1124 printf("\tleave\n");
|
|
|
1125 printf("\tret\n");
|
|
|
1126 printf("\t.set _%d,%d\n",func_disp_label,disp+disp_offset);
|
|
|
1127 printf("_%d:\n",labelno);
|
|
|
1128 printf("\t.size\t%s,_%d-%s\n",name,labelno,name);
|
|
|
1129 local_table();
|
|
|
1130 labelno++;
|
|
|
1131 free_all_register();
|
|
|
1132 }
|
|
|
1133
|
|
|
1134
|
|
|
1135 void
|
|
|
1136 code_set_fixed_creg(int mode) {
|
|
|
1137 use_register(creg,REG_EAX,mode);
|
|
|
1138 }
|
|
|
1139
|
|
|
1140 void
|
|
|
1141 gen_gdecl(char *n, int gpc)
|
|
|
1142 {
|
|
|
1143 /*
|
|
|
1144 if (stmode!=STATIC)
|
|
|
1145 printf(".globl %s\n",n);
|
|
|
1146 */
|
|
|
1147 }
|
|
|
1148
|
|
|
1149 void
|
|
|
1150 align(int t)
|
|
|
1151 {
|
|
|
1152 if (t!=CHAR) {
|
|
|
1153 if (data_alignment & 1)
|
|
|
1154 printf("\t.align 2\n");
|
|
|
1155 data_alignment = 0;
|
|
|
1156 }
|
|
|
1157 }
|
|
|
1158
|
|
|
1159 void
|
|
|
1160 emit_data(int e, int t, NMTBL *n)
|
|
|
1161 {
|
|
|
1162 int l;
|
|
|
1163 char *name;
|
|
|
1164 name = n->nm;
|
|
|
1165 if(mode!=GDECL) {
|
|
|
1166 error(-1); return;
|
|
|
1167 }
|
|
66
|
1168 if (chk) return;
|
|
61
|
1169 if (n->dsp != -1) {
|
|
|
1170 n->dsp = -1; /* initiallized flag */
|
|
|
1171 printf(".globl\t%s\n",name);
|
|
|
1172 data_mode(name);
|
|
|
1173 align(t);
|
|
|
1174 printf("%s:\n",name);
|
|
|
1175 } else {
|
|
|
1176 data_mode(0);
|
|
|
1177 }
|
|
|
1178 if(car(e)==CONST) {
|
|
|
1179 if (t==CHAR) {
|
|
|
1180 printf("\t.byte %d\n",cadr(e));
|
|
|
1181 if (data_alignment>0)
|
|
|
1182 data_alignment++;
|
|
|
1183 gpc += 1;
|
|
|
1184 } else {
|
|
|
1185 printf("\t.long %d\n",cadr(e));
|
|
|
1186 gpc += size_of_int;
|
|
|
1187 }
|
|
|
1188 } else if(t!=CHAR) {
|
|
|
1189 gpc += size_of_int;
|
|
|
1190 if(car(e)==ADDRESS&&car(cadr(e))==GVAR) {
|
|
|
1191 printf("\t.long %s\n",(char *)caddr(cadr(e)));
|
|
|
1192 } else if(car(e)==FNAME) {
|
|
|
1193 printf("\t.long %s\n",((NMTBL *)cadr(e))->nm);
|
|
|
1194 } else if(car(e)==STRING) {
|
|
|
1195 if (car(n->ty)!=ARRAY || cadr(n->ty)!=CHAR) {
|
|
|
1196 l = fwdlabel();
|
|
|
1197 printf("\t.long _%d\n",l);
|
|
|
1198 printf(".section\t.rodata\n");
|
|
|
1199 printf("_%d:\n",l);
|
|
|
1200 output_mode = RODATA_EMIT_MODE;
|
|
|
1201 }
|
|
|
1202 ascii((char *)cadr(e));
|
|
|
1203 } else error(TYERR);
|
|
|
1204 }
|
|
|
1205 }
|
|
|
1206
|
|
|
1207 void
|
|
|
1208 emit_data_closing(NMTBL *n)
|
|
|
1209 {
|
|
|
1210 int lb;
|
|
66
|
1211 if (chk) return;
|
|
61
|
1212 if (mode==GDECL) {
|
|
|
1213 data_mode(0);
|
|
|
1214 lb=fwdlabel();
|
|
|
1215 printf("_%d:\n",lb);
|
|
|
1216 printf("\t.size\t%s,_%d-%s\n",n->nm,lb,n->nm);
|
|
|
1217 }
|
|
|
1218 }
|
|
|
1219
|
|
|
1220 void
|
|
|
1221 global_table(void)
|
|
|
1222 {
|
|
|
1223 NMTBL *n;
|
|
|
1224 int init;
|
|
|
1225 init=0;
|
|
|
1226 for(n=ntable;n < &ntable[GSYMS];n++) {
|
|
|
1227 if (n->sc == GVAR && n->dsp != -1) {
|
|
|
1228 /* n->dsp = -1 means initialized global */
|
|
|
1229 if (init==0) {
|
|
|
1230 data_mode(0);
|
|
|
1231 init=1;
|
|
|
1232 }
|
|
|
1233 printf(".comm %s,%d\n",n->nm,size(n->ty));
|
|
|
1234 }
|
|
|
1235 }
|
|
|
1236 }
|
|
|
1237
|
|
|
1238 void
|
|
|
1239 local_table(void)
|
|
|
1240 {
|
|
|
1241 NMTBL *n;
|
|
|
1242 int init;
|
|
|
1243 init=0;
|
|
|
1244 /* static local variables */
|
|
|
1245 for(n=ntable+GSYMS;n < &ntable[GSYMS+LSYMS];n++) {
|
|
|
1246 if (n->sc == GVAR) {
|
|
|
1247 if (init==0) {
|
|
|
1248 data_mode(0);
|
|
|
1249 init=1;
|
|
|
1250 }
|
|
|
1251 printf(".lcomm %s,%d\n",n->nm,size(n->ty));
|
|
|
1252 }
|
|
|
1253 }
|
|
|
1254 }
|
|
|
1255
|
|
|
1256 void
|
|
|
1257 text_mode(void)
|
|
|
1258 {
|
|
|
1259 if (output_mode!=TEXT_EMIT_MODE) {
|
|
|
1260 printf(".text\n");
|
|
|
1261 printf("\t.align 2\n");
|
|
|
1262 output_mode = TEXT_EMIT_MODE;
|
|
|
1263 }
|
|
|
1264 }
|
|
|
1265
|
|
|
1266 void
|
|
|
1267 data_mode(char *name)
|
|
|
1268 {
|
|
|
1269 if (output_mode!=DATA_EMIT_MODE) {
|
|
|
1270 printf(".data\n");
|
|
|
1271 output_mode = DATA_EMIT_MODE;
|
|
|
1272 }
|
|
|
1273 if (name)
|
|
|
1274 printf("\t.type\t%s,@object\n",name);
|
|
|
1275 }
|
|
|
1276
|
|
|
1277 int
|
|
|
1278 lvar(int l)
|
|
|
1279 {
|
|
|
1280 if (fnptr->sc==CODE) {
|
|
|
1281 return l+code_disp_offset;
|
|
|
1282 } else if (l<0) {
|
|
|
1283 return l+disp_offset;
|
|
|
1284 } else {
|
|
|
1285 return l+arg_offset;
|
|
|
1286 }
|
|
|
1287 }
|
|
|
1288
|
|
|
1289 /* end */
|
