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99
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1
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2 #define DEBUG error(-1)
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3
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4 /*#include "CCLIB.TXT"
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5 */
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6 #include <stdio.h>
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7
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100
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8 /* to avoid conflict with stdio.h */
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9 #define getline getline1
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10 #define index index1
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11
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99
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12 #define INT (-1)
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13 #define CHAR (-2)
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14 #define UNSIGNED (-3)
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15 #define POINTER (-4)
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16 #define ARRAY (-5)
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17 #define STRUCT (-6)
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18 #define UNION (-7)
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19 #define FUNCTION (-8)
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20 #define EMPTY (-9)
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21
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22 #define STATIC (-10)
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23 #define GOTO (-11)
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24 #define RETURN (-12)
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25 #define BREAK (-13)
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26 #define CONTINUE (-14)
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27 #define IF (-15)
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28 #define ELSE (-16)
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29 #define FOR (-17)
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30 #define DO (-18)
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31 #define WHILE (-19)
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32 #define SWITCH (-20)
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33 #define CASE (-21)
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34 #define DEFAULT (-22)
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35 #define RESERVE (-23)
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36 #define TAG (-24)
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37 #define FIELD (-25)
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38 #define IDENT (-26)
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39 #define STRING (-27)
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40 #define MACRO (-28)
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41 #define BLABEL (-29)
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42 #define FLABEL (-30)
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43 #define TYPEDEF (-31)
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44 #define SIZEOF (-32)
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45 #define TYPE (-33)
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46 #define LONG (-34)
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47 #define SHORT (-35)
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48
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49 #define TOP 0
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50 #define GDECL 1
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51 #define GSDECL 2
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52 #define GUDECL 3
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53 #define ADECL 4
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54 #define LDECL 5
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55 #define LSDECL 6
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56 #define LUDECL 7
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57 #define STADECL 8
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58 #define STAT 9
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59 #define GTDECL 10
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60 #define LTDECL 11
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61
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62 #define GVAR 1
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63 #define RGVAR 2
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64 #define CRGVAR 3
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65 #define LVAR 4
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66 #define RLVAR 5
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67 #define CRLVAR 6
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68 #define CONST 7
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69 #define FNAME 8
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70 #define INDIRECT 9
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71 #define RINDIRECT 10
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72 #define CRINDIRECT 11
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73 #define ADDRESS 12
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74 #define MINUS 13
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75 #define LNOT 14
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76 #define BNOT 15
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77 #define INC 16
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78 #define POSTINC 17
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79 #define PREINC 18
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80 #define CPOSTINC 19
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81 #define CPREINC 20
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82 #define DEC 21
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83 #define CPOSTDEC 22
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84 #define CPREDEC 23
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85 #define MUL 24
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86 #define UMUL 25
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87 #define DIV 26
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88 #define UDIV 27
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89 #define MOD 28
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90 #define UMOD 29
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91 #define ADD 30
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92 #define SUB 31
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93 #define RSHIFT 32
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94 #define URSHIFT 33
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95 #define LSHIFT 34
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96 #define ULSHIFT 35
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97 #define GT 36
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98 #define UGT 37
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99 #define GE 38
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100 #define UGE 39
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101 #define LT 40
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102 #define ULT 41
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103 #define LE 42
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104 #define ULE 43
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105 #define EQ 44
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106 #define NEQ 45
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107 #define BAND 46
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108 #define EOR 47
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109 #define BOR 48
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110 #define LAND 49
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111 #define LOR 50
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112 #define COND 51
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113 #define ASS 52
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114 #define CASS 53
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115 #define ASSOP 54
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116 #define CASSOP 55
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117 #define COMMA 56
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118 #define LPAR 57
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119 #define RPAR 58
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120 #define LBRA 59
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121 #define RBRA 60
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122 #define LC 61
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123 #define RC 62
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124 #define COLON 63
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125 #define SM 64
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126 #define PERIOD 65
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127 #define ARROW 66
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128
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129 #define US 1
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130 #define AS 100
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131
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132 #define FILERR 1
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133 #define DCERR 2
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134 #define STERR 3
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135 #define EXERR 4
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136 #define CNERR 5
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137 #define CHERR 6
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138 #define GSERR 7
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139 #define LSERR 8
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140 #define STRERR 9
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141 #define LNERR 10
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142 #define EOFERR 11
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143 #define MCERR 12
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144 #define INCERR 13
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145 #define HPERR 14
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146 #define TYERR 15
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147 #define LVERR 16
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148 #define UDERR 17
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149 #define OPTION 18
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150
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151 #define GSYMS 450
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152 #define LSYMS 50
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153
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154 #define HEAPSIZE 1000
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155 #define CHEAPSIZE 3000
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156 #define LBUFSIZE 256
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157
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158 #define FILES 3
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159
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160 int sym,ch,chsave,type,mode,gfree,lfree,mflag,lineno,glineno;
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161 int labelno,gpc,lvar,disp;
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162 int symval,args,heap[HEAPSIZE];
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163 int blabel,clabel,dlabel,cslabel,ilabel,control,ac,ac2,lsrc,chk,asmf;
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164
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165 unsigned hash;
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166
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167 char linebuf[LBUFSIZE],cheap[CHEAPSIZE],*chptr,*chptrsave;
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168 char name[9],*cheapp,**av,/*obuf[320],*/*sptr,escape();
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169
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170 FILE *obuf;
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171
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172 typedef struct nametable {
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173 char nm[9];
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174 int sc,ty,dsp; } NMTBL;
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175
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176 NMTBL ntable[GSYMS+LSYMS],*nptr,*gnptr,*decl0(),*decl1(),*lsearch(),*gsearch();
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177
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178 struct {int fd,ln;/*char fcb[320]*/FILE *fcb;} *filep,filestack[FILES];
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179
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180 main(argc,argv)
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181 int argc;
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182 char **argv;
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183 {NMTBL *nptr;
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184 int i;
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185 char *ccout;
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186 if(argc==1) exit(1);
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187 lsrc = chk = asmf = 0;
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188 ccout = "c.out";
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189 ac=argc;
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190 av=argv;
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191 for (ac2=1; (ac2 < ac) && (*av[ac2] == '-'); ++ac2)
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192 switch (*(av[ac2]+1))
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193 {case 'S': case 's':
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194 lsrc = 1;
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195 break;
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196 case 'O': case 'o':
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197 ccout = av[ac2]+2;
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198 break;
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199 case 'C': case 'c':
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200 chk = 1;
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201 break;
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202 default:
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203 error(OPTION);
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204 exit(1);
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205 }
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206 fclose(stdout);
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207 if (!chk)
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208 if ( (obuf = fopen(ccout,"w")) == NULL ) error(FILERR);
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209 init();
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210 while(1)
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211 { for (nptr = &ntable[GSYMS],i=LSYMS; i--;)
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212 (nptr++)->sc = EMPTY;
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213 mode=TOP;
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214 while(getsym()==SM);
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215 mode=GDECL;
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216 args=0;
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217 decl();
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218 }
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219 }
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220 error(n)
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221 int n;
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222 { if(n == EOFERR)
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223 if(filep!=filestack)
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224 { lineno=filep->ln;
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225 fclose(filep->fcb);
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226 fprintf(stderr,"End of inclusion.\n");
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227 --filep;
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228 return;
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229 }
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230 else if(ac2!=ac)
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231 { fclose(filep->fcb);
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232 newfile();
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233 return;
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234 }
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235 else if(mode == TOP)
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236 { fprintf(stderr,"\nCompiled %u lines.\n",glineno-1);
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237 if (!chk) fprintf(stderr,
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238 "Total internal labels : %u.\n",labelno-1);
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239 fprintf(stderr,
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240 "Total global variables : %u bytes.\n\n",gpc);
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241 printf("_%d\tRTS\n_INITIALIZE\tEQU\t_1\n",ilabel);
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100
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242 printf("_GLOBALS\tEQU\t%u\n",gpc);
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99
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243 exit(0);
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244 }
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245 fprintf(stderr,"%5d:%s.\n",lineno,
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246 (n==FILERR) ? "Can't open specified file" :
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247 (n==DCERR) ? "Declaration syntax" :
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248 (n==STERR) ? "Statement syntax" :
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249 (n==EXERR) ? "Expression syntax" :
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250 (n==CNERR) ? "Constant required" :
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251 (n==CHERR) ? "Illegal character" :
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252 (n==GSERR) ? "Too many global symbols" :
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253 (n==LSERR) ? "Too many local symbols" :
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254 (n==STRERR) ? "Too many strings or macros" :
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255 (n==LNERR) ? "Line too long" :
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256 (n==EOFERR) ? "Unexpected end of file" :
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257 (n==MCERR) ? "Macro syntax" :
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258 (n==INCERR) ? "Include syntax" :
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259 (n==HPERR) ? "Too long expression" :
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260 (n==TYERR) ? "Type mismatch" :
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261 (n==LVERR) ? "Lvalue required" :
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262 (n==UDERR) ? "Undeclared identifier" :
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263 (n==OPTION) ? "Illegal option" :
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264 "Bug of compiler");
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265 errmsg();
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266 exit(1);
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267 }
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268 errmsg()
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269 {char *p,*lim;
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270 if(lineno==0) return;
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271 fprintf(stderr,"%s",linebuf);
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272 lim=(mflag?chptrsave:chptr);
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273 for (p=linebuf; p < lim;)
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274 fprintf(stderr,(*p++ == '\t') ? "\t" : " ");
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275 fprintf (stderr,"^\n");
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276 }
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277 checksym(s)
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278 int s;
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279 {char *p;
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280 if (sym != s)
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281 { p=(s==RPAR) ? "')'": (s==RBRA) ? "']'": (s==SM) ? "';'":
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282 (s==LPAR) ? "'('": (s==WHILE) ? "'while'":
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283 (s==COLON) ? "':'": "Identifier";
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284 fprintf(stderr,"%d:%s expected.\n",lineno,p);
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285 errmsg();
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286 }
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287 else getsym();
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288 }
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289 init()
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290 {NMTBL *nptr;
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291 int i;
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292 for(nptr = ntable,i = GSYMS; i--;) (nptr++)->sc = EMPTY;
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293 reserve("int",INT);
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294 reserve("void",INT);
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295 reserve("char",CHAR);
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296 reserve("struct",STRUCT);
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297 reserve("union",UNION);
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298 reserve("unsigned",UNSIGNED);
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299 reserve("static",STATIC);
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300 reserve("goto",GOTO);
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301 reserve("return",RETURN);
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302 reserve("break",BREAK);
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303 reserve("continue",CONTINUE);
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304 reserve("if",IF);
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305 reserve("else",ELSE);
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306 reserve("for",FOR);
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307 reserve("do",DO);
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308 reserve("while",WHILE);
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309 reserve("switch",SWITCH);
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310 reserve("case",CASE);
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311 reserve("default",DEFAULT);
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312 reserve("typedef",TYPEDEF);
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313 reserve("sizeof",SIZEOF);
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314 reserve("long",LONG);
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315 reserve("short",SHORT);
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316 gpc=glineno=mflag=0;
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317 gfree=ilabel=1;
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318 labelno=2;
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319 cheapp=cheap;
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320 lfree=HEAPSIZE;
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321 filep=filestack;
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322 newfile();
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323 getline();
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324 getch();
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325 }
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326 newfile()
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327 { lineno=0;
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328 fprintf(stderr,"%s:\n",av[ac2]);
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329 if ( (filep->fcb = fopen(av[ac2++],"r")) == NULL ) error(FILERR);
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330 }
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331 reserve(s,d)
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332 char *s;
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333 int d;
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334 {NMTBL *nptr;
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335 char *t;
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336 hash=0;
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337 t=name;
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338 while(*t++ = *s) hash=7*(hash+*s++);
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339 (nptr = gsearch())->sc = RESERVE;
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340 nptr->dsp = d;
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341 }
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342
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343 decl()
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344 {NMTBL *n;
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345 int t;
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346 if(sym==STATIC)
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347 if(mode==LDECL)
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348 { getsym();
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349 mode=STADECL;
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350 }
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351 else error(DCERR);
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352 else if(sym==TYPEDEF)
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353 if(mode==GDECL)
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354 { getsym();
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355 mode=GTDECL;
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356 }
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357 else if(mode==LDECL)
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358 { getsym();
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359 mode=LTDECL;
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360 }
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361 else error(DCERR);
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362 if((t=typespec())==0) return;
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363 if(sym==SM) return;
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364 type=t;
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365 n=decl0();
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366 reverse(t);
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367 if(args||sym==LC) {fdecl(n);return;}
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368 def(n);
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369 while(sym==COMMA)
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370 { getsym();
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371 type=t;
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372 n=decl0();
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373 reverse(t);
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374 if(args) error(DCERR);
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375 def(n);
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376 }
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377 if(sym!=SM) error(DCERR);
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378 if(mode==GTDECL) mode=GDECL;
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379 if(mode==STADECL||mode==LTDECL) mode=LDECL;
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380 }
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381 typespec()
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382 {int t;
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383 switch(sym)
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384 {case INT:
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385 case CHAR:
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386 t= sym;
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387 getsym();
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388 break;
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389 case STRUCT:
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390 case UNION:
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391 t=sdecl(sym);
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392 break;
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393 case UNSIGNED:
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394 t = UNSIGNED;
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395 if(getsym()==INT) getsym();
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396 break;
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397 case SHORT:
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398 t=CHAR;
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399 if(getsym()==INT) getsym();
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400 break;
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401 case LONG:
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402 t=INT;
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403 if(getsym()==INT) getsym();
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404 break;
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405 default:
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406 if(sym==IDENT)
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407 if(nptr->sc==TYPE)
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408 { t=nptr->ty;
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409 getsym();
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410 break;
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411 }
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412 else if(nptr->sc==EMPTY && gnptr->sc==TYPE)
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413 { t=gnptr->ty;
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414 getsym();
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415 break;
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416 }
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417 if(mode==LDECL) return 0;
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418 t= INT;
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419 }
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420 return t;
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421 }
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422 struct nametable *decl0()
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423 {NMTBL *n;
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424 if(sym==MUL)
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425 { getsym();
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426 n=decl0();
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427 type=list2(POINTER,type);
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428 return n;
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429 }
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430 return decl1();
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431 }
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432 NMTBL *decl1()
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433 {NMTBL *n;
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434 int i,t;
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435 if(sym==LPAR)
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436 { getsym();
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437 n=decl0();
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438 checksym(RPAR);
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439 }
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440 else if (sym == IDENT)
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441 { n=nptr;
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442 getsym();
|
|
|
443 }
|
|
|
444 else error(DCERR);
|
|
|
445 while(1)
|
|
|
446 if(sym==LBRA)
|
|
|
447 if(getsym()==RBRA)
|
|
|
448 { getsym();
|
|
|
449 if(mode!=ADECL) error(DCERR);
|
|
|
450 t=type;
|
|
|
451 type=list2(POINTER,type);
|
|
|
452 }
|
|
|
453 else
|
|
|
454 { t=type;
|
|
|
455 i=cexpr(expr());
|
|
|
456 checksym(RBRA);
|
|
|
457 type=list3(ARRAY,t,i);
|
|
|
458 }
|
|
|
459 else if(sym==LPAR)
|
|
|
460 { if(mode==GDECL) {mode=ADECL;getsym();mode=GDECL;}
|
|
|
461 else getsym();
|
|
|
462 if(sym==RPAR) getsym();
|
|
|
463 else
|
|
|
464 { n->sc=FUNCTION;
|
|
|
465 adecl();
|
|
|
466 n->sc=EMPTY;
|
|
|
467 }
|
|
|
468 type=list2(FUNCTION,type);
|
|
|
469 }
|
|
|
470 else return n;
|
|
|
471 }
|
|
|
472 adecl()
|
|
|
473 { if(mode!=GDECL) error(DCERR);
|
|
|
474 mode=ADECL;
|
|
|
475 args= 2;
|
|
|
476 while(1)
|
|
|
477 { if(sym!=IDENT) error(DCERR);
|
|
|
478 nptr->ty = INT;
|
|
|
479 nptr->sc = LVAR;
|
|
|
480 nptr->dsp = (args += 2);
|
|
|
481 if(getsym()!=COMMA) break;
|
|
|
482 getsym();
|
|
|
483 }
|
|
|
484 checksym(RPAR);
|
|
|
485 mode=GDECL;
|
|
|
486 return;
|
|
|
487 }
|
|
|
488 reverse(t1)
|
|
|
489 int t1;
|
|
|
490 {int t2,t3;
|
|
|
491 t2=t1;
|
|
|
492 while(type!=t1)
|
|
|
493 { t3=cadr(type);
|
|
|
494 rplacad(type,t2);
|
|
|
495 t2=type;
|
|
|
496 type=t3;
|
|
|
497 }
|
|
|
498 type=t2;
|
|
|
499 }
|
|
|
500 size(t)
|
|
|
501 int t;
|
|
|
502 { if(t==CHAR) return 1;
|
|
|
503 if(scalar(t)) return 2;
|
|
|
504 if(car(t)==STRUCT||car(t)==UNION)
|
|
|
505 { if(cadr(t)==-1) error(DCERR);
|
|
|
506 return(cadr(t));
|
|
|
507 }
|
|
|
508 if(car(t)==ARRAY) return(size(cadr(t))*caddr(t));
|
|
|
509 else error(DCERR);
|
|
|
510 /*NOTREACHED*/
|
|
|
511 }
|
|
|
512 def(n)
|
|
|
513 NMTBL *n;
|
|
|
514 {int sz,nsc,ndsp,slfree,l,t,e;
|
|
|
515 if(car(type)==FUNCTION)
|
|
|
516 { fcheck(n);
|
|
|
517 return;
|
|
|
518 }
|
|
|
519 if (n->sc!=EMPTY &&
|
|
|
520 (mode!=ADECL || n->sc!=LVAR || n->ty!=INT) &&
|
|
|
521 (mode!=GSDECL&&mode!=LSDECL || n->sc!=FIELD || n->dsp!=disp) &&
|
|
|
522 (mode!=GUDECL&&mode!=LUDECL || n->sc!=FIELD || n->dsp!=0) )
|
|
|
523 error(DCERR);
|
|
|
524 sz = size(n->ty = type);
|
|
|
525 switch(mode)
|
|
|
526 {case GDECL:
|
|
|
527 printf("%s\tEQU\t%u\n",n->nm,gpc);
|
|
|
528 case STADECL:
|
|
|
529 nsc = GVAR;
|
|
|
530 ndsp = gpc;
|
|
|
531 if(sym==ASS)
|
|
|
532 { t=type;
|
|
|
533 if(!scalar(t))
|
|
|
534 error(TYERR);
|
|
|
535 if(mode==STADECL) printf("\tBRA\t_%d\n",l=fwdlabel());
|
|
|
536 fwddef(ilabel);
|
|
|
537 getsym();
|
|
|
538 slfree=lfree;
|
|
|
539 e=expr1();
|
|
|
540 if(car(e)==CONST)
|
|
|
541 { lddim(cadr(e));
|
|
|
542 indexy(t==CHAR?"STB":"STD",gpc);
|
|
|
543 }
|
|
|
544 else if(t!=CHAR)
|
|
|
545 { if(car(e)==ADDRESS&&car(cadr(e))==GVAR)
|
|
|
546 leaxy(cadr(cadr(e)));
|
|
|
547 else if(car(e)==FNAME)
|
|
|
548 leaxpcr((NMTBL *)cadr(e));
|
|
|
549 else error(TYERR);
|
|
|
550 stxy(gpc);
|
|
|
551 }
|
|
|
552 else error(TYERR);
|
|
|
553 lfree=slfree;
|
|
|
554 jmp(ilabel=fwdlabel());
|
|
|
555 if(mode==STADECL) fwddef(l);
|
|
|
556 type=t;
|
|
|
557 }
|
|
|
558 gpc +=sz;
|
|
|
559 break;
|
|
|
560 case GSDECL:
|
|
|
561 nsc = FIELD;
|
|
|
562 ndsp = disp;
|
|
|
563 disp += sz;
|
|
|
564 break;
|
|
|
565 case GUDECL:
|
|
|
566 nsc = FIELD;
|
|
|
567 ndsp = 0;
|
|
|
568 if (disp < sz) disp = sz;
|
|
|
569 break;
|
|
|
570 case GTDECL:
|
|
|
571 nsc = TYPE;
|
|
|
572 break;
|
|
|
573 case ADECL:
|
|
|
574 if(type==CHAR) ++(n->dsp);
|
|
|
575 else if (!scalar(type)) error(TYERR);
|
|
|
576 return;
|
|
|
577 case LDECL:
|
|
|
578 nsc = LVAR;
|
|
|
579 ndsp = (disp -= sz);
|
|
|
580 break;
|
|
|
581 case LSDECL:
|
|
|
582 nsc = FIELD;
|
|
|
583 ndsp = disp;
|
|
|
584 disp += sz;
|
|
|
585 break;
|
|
|
586 case LUDECL:
|
|
|
587 nsc = FIELD;
|
|
|
588 ndsp = 0;
|
|
|
589 if (disp < sz) disp = sz;
|
|
|
590 break;
|
|
|
591 case LTDECL:
|
|
|
592 nsc = TYPE;
|
|
|
593 break;
|
|
|
594 default:
|
|
|
595 error(DCERR);
|
|
|
596 }
|
|
|
597 n->sc = nsc;
|
|
|
598 n->dsp = ndsp;
|
|
|
599 }
|
|
|
600 sdecl(s)
|
|
|
601 int s;
|
|
|
602 {int smode,sdisp,type;
|
|
|
603 NMTBL *nptr0;
|
|
|
604 smode=mode;
|
|
|
605 if (mode==GDECL || mode==GSDECL || mode==GUDECL || mode==GTDECL)
|
|
|
606 mode=(s==STRUCT?GSDECL:GUDECL);
|
|
|
607 else mode=(s==STRUCT?LSDECL:LUDECL);
|
|
|
608 sdisp=disp;
|
|
|
609 disp=0;
|
|
|
610 if (getsym() == IDENT)
|
|
|
611 { nptr0 = nptr;
|
|
|
612 if (getsym() == LC)
|
|
|
613 { if (nptr0->sc != EMPTY) error(DCERR);
|
|
|
614 nptr0->sc = TAG;
|
|
|
615 nptr0->ty = list2(s,-1);
|
|
|
616 while (getsym() != RC) decl();
|
|
|
617 getsym();
|
|
|
618 rplacad(type = nptr0->ty,disp);
|
|
|
619 }
|
|
|
620 else
|
|
|
621 { if(nptr0->sc == EMPTY) nptr0=gnptr;
|
|
|
622 if(nptr0->sc == EMPTY) error(UDERR);
|
|
|
623 if(nptr0->sc != TAG) error(TYERR);
|
|
|
624 type = nptr0->ty;
|
|
|
625 }
|
|
|
626 }
|
|
|
627 else if(sym==LC)
|
|
|
628 { while(getsym() != RC) decl();
|
|
|
629 getsym();
|
|
|
630 type = list2(s,disp);
|
|
|
631 }
|
|
|
632 else error(DCERR);
|
|
|
633 disp=sdisp;
|
|
|
634 mode=smode;
|
|
|
635 return type;
|
|
|
636 }
|
|
|
637 fdecl(n)
|
|
|
638 NMTBL *n;
|
|
|
639 { args=0;
|
|
|
640 fcheck(n);
|
|
|
641 mode=ADECL;
|
|
|
642 lfree= HEAPSIZE;
|
|
|
643 while (sym!=LC) {decl(); getsym();}
|
|
|
644 disp=0;
|
|
|
645 mode=STAT;
|
|
|
646 while (typeid(getsym()) || sym==STATIC || sym==TYPEDEF)
|
|
|
647 { mode=LDECL;
|
|
|
648 decl();
|
|
|
649 mode=STAT;
|
|
|
650 }
|
|
|
651 control=1;
|
|
|
652 printf("%s\n\tPSHS\tU\n\tLEAU\t,S\n",n->nm);
|
|
|
653 if(disp) printf("\tLEAS\t%d,S\n",disp);
|
|
|
654 lvar= -disp;
|
|
|
655 while(sym!=RC) statement();
|
|
|
656 if (control) return2();
|
|
|
657 }
|
|
|
658 fcheck(n)
|
|
|
659 NMTBL *n;
|
|
|
660 { if(mode!=GDECL||car(type)!=FUNCTION) error(DCERR);
|
|
|
661 if(n->sc==FUNCTION) compatible(n->ty,cadr(type));
|
|
|
662 else if(n->sc!=EMPTY) error(DCERR);
|
|
|
663 n->sc=FUNCTION;
|
|
|
664 n->ty=cadr(type);
|
|
|
665 }
|
|
|
666 compatible(t1,t2)
|
|
|
667 int t1,t2;
|
|
|
668 { if(integral(t1))
|
|
|
669 { if(t1!=t2) error(TYERR);
|
|
|
670 }
|
|
|
671 else if(car(t1)!=car(t2)) error(TYERR);
|
|
|
672 else if((car(t1)==STRUCT || car(t1)==UNION) && cadr(t1)!=cadr(t2))
|
|
|
673 error(TYERR);
|
|
|
674 else if(car(t1)==POINTER || car(t1)==ARRAY ||car(t1)==FUNCTION)
|
|
|
675 compatible(cadr(t1),cadr(t2));
|
|
|
676 }
|
|
|
677 scalar(t)
|
|
|
678 int t;
|
|
|
679 { return(integral(t)||car(t)==POINTER);
|
|
|
680 }
|
|
|
681 integral(t)
|
|
|
682 int t;
|
|
|
683 { return(t==INT||t==CHAR||t==UNSIGNED);
|
|
|
684 }
|
|
|
685
|
|
|
686 statement()
|
|
|
687 {int slfree;
|
|
|
688 switch(sym)
|
|
|
689 {case IF:
|
|
|
690 doif();
|
|
|
691 return;
|
|
|
692 case WHILE:
|
|
|
693 dowhile();
|
|
|
694 return;
|
|
|
695 case DO:
|
|
|
696 dodo();
|
|
|
697 return;
|
|
|
698 case FOR:
|
|
|
699 dofor();
|
|
|
700 return;
|
|
|
701 case SWITCH:
|
|
|
702 doswitch();
|
|
|
703 return;
|
|
|
704 case LC:
|
|
|
705 docomp();
|
|
|
706 return;
|
|
|
707 case BREAK:
|
|
|
708 jmp(blabel);
|
|
|
709 getsym();
|
|
|
710 checksym(SM);
|
|
|
711 return;
|
|
|
712 case CONTINUE:
|
|
|
713 jmp(clabel);
|
|
|
714 getsym();
|
|
|
715 checksym(SM);
|
|
|
716 return;
|
|
|
717 case CASE:
|
|
|
718 docase();
|
|
|
719 statement();
|
|
|
720 return;
|
|
|
721 case DEFAULT:
|
|
|
722 dodefault();
|
|
|
723 statement();
|
|
|
724 return;
|
|
|
725 case RETURN:
|
|
|
726 doreturn();
|
|
|
727 return;
|
|
|
728 case GOTO:
|
|
|
729 dogoto();
|
|
|
730 return;
|
|
|
731 case SM:
|
|
|
732 getsym();
|
|
|
733 return;
|
|
|
734 default:if(sym==IDENT&&skipspc()==':')
|
|
|
735 { dolabel();
|
|
|
736 statement();
|
|
|
737 }
|
|
|
738 else
|
|
|
739 { slfree=lfree;
|
|
|
740 gexpr(expr());
|
|
|
741 lfree=slfree;
|
|
|
742 checksym(SM);
|
|
|
743 }
|
|
|
744 }
|
|
|
745 }
|
|
|
746 doif()
|
|
|
747 {int l1,l2,slfree;
|
|
|
748 getsym();
|
|
|
749 checksym(LPAR);
|
|
|
750 slfree=lfree;
|
|
|
751 bexpr(expr(),0,l1=fwdlabel());
|
|
|
752 lfree=slfree;
|
|
|
753 checksym(RPAR);
|
|
|
754 statement();
|
|
|
755 if(sym==ELSE)
|
|
|
756 { if (l2 = control) jmp(l2=fwdlabel());
|
|
|
757 fwddef(l1);
|
|
|
758 getsym();
|
|
|
759 statement();
|
|
|
760 if (l2) fwddef(l2);
|
|
|
761 }
|
|
|
762 else fwddef(l1);
|
|
|
763 }
|
|
|
764 dowhile()
|
|
|
765 {int sbreak,scontinue,slfree,e;
|
|
|
766 sbreak=blabel;
|
|
|
767 scontinue=clabel;
|
|
|
768 blabel=fwdlabel();
|
|
|
769 clabel=backdef();
|
|
|
770 getsym();
|
|
|
771 checksym(LPAR);
|
|
|
772 slfree=lfree;
|
|
|
773 e=expr();
|
|
|
774 checksym(RPAR);
|
|
|
775 if(sym==SM)
|
|
|
776 { bexpr(e,1,clabel);
|
|
|
777 lfree=slfree;
|
|
|
778 getsym();
|
|
|
779 }
|
|
|
780 else
|
|
|
781 { bexpr(e,0,blabel);
|
|
|
782 lfree=slfree;
|
|
|
783 statement();
|
|
|
784 jmp(clabel);
|
|
|
785 }
|
|
|
786 fwddef(blabel);
|
|
|
787 clabel=scontinue;
|
|
|
788 blabel=sbreak;
|
|
|
789 }
|
|
|
790 dodo()
|
|
|
791 {int sbreak,scontinue,l,slfree;
|
|
|
792 sbreak=blabel;
|
|
|
793 scontinue=clabel;
|
|
|
794 blabel=fwdlabel();
|
|
|
795 clabel=fwdlabel();
|
|
|
796 l=backdef();
|
|
|
797 getsym();
|
|
|
798 statement();
|
|
|
799 fwddef(clabel);
|
|
|
800 checksym(WHILE);
|
|
|
801 checksym(LPAR);
|
|
|
802 slfree=lfree;
|
|
|
803 bexpr(expr(),1,l);
|
|
|
804 lfree=slfree;
|
|
|
805 checksym(RPAR);
|
|
|
806 checksym(SM);
|
|
|
807 fwddef(blabel);
|
|
|
808 clabel=scontinue;
|
|
|
809 blabel=sbreak;
|
|
|
810 }
|
|
|
811 dofor()
|
|
|
812 {int sbreak,scontinue,l,e,slfree;
|
|
|
813 sbreak=blabel;
|
|
|
814 scontinue=clabel;
|
|
|
815 blabel=fwdlabel();
|
|
|
816 getsym();
|
|
|
817 checksym(LPAR);
|
|
|
818 slfree=lfree;
|
|
|
819 if(sym!=SM)
|
|
|
820 { gexpr(expr());
|
|
|
821 checksym(SM);
|
|
|
822 }
|
|
|
823 else getsym();
|
|
|
824 lfree=slfree;
|
|
|
825 l=backdef();
|
|
|
826 if(sym!=SM)
|
|
|
827 { bexpr(expr(),0,blabel);
|
|
|
828 checksym(SM);
|
|
|
829 }
|
|
|
830 else getsym();
|
|
|
831 lfree=slfree;
|
|
|
832 if(sym==RPAR)
|
|
|
833 { clabel=l;
|
|
|
834 getsym();
|
|
|
835 statement();
|
|
|
836 }
|
|
|
837 else
|
|
|
838 { clabel=fwdlabel();
|
|
|
839 e=expr();
|
|
|
840 checksym(RPAR);
|
|
|
841 statement();
|
|
|
842 fwddef(clabel);
|
|
|
843 gexpr(e);
|
|
|
844 lfree=slfree;
|
|
|
845 }
|
|
|
846 jmp(l);
|
|
|
847 fwddef(blabel);
|
|
|
848 clabel=scontinue;
|
|
|
849 blabel=sbreak;
|
|
|
850 }
|
|
|
851 doswitch()
|
|
|
852 {int sbreak,scase,sdefault,slfree;
|
|
|
853 sbreak=blabel;
|
|
|
854 blabel=fwdlabel();
|
|
|
855 sdefault=dlabel;
|
|
|
856 dlabel=0;
|
|
|
857 scase=cslabel;
|
|
|
858 getsym();
|
|
|
859 checksym(LPAR);
|
|
|
860 slfree=lfree;
|
|
|
861 gexpr(expr());
|
|
|
862 lfree=slfree;
|
|
|
863 checksym(RPAR);
|
|
|
864 cslabel = control = 0;
|
|
|
865 statement();
|
|
|
866 if(dlabel) printf("_%d\tEQU\t_%d\n",cslabel,dlabel);
|
|
|
867 else fwddef(cslabel);
|
|
|
868 cslabel=scase;
|
|
|
869 dlabel=sdefault;
|
|
|
870 fwddef(blabel);
|
|
|
871 blabel=sbreak;
|
|
|
872 }
|
|
|
873 docomp()
|
|
|
874 { getsym();
|
|
|
875 while(sym!=RC) statement();
|
|
|
876 getsym();
|
|
|
877 }
|
|
|
878 docase()
|
|
|
879 {int c,n,l,slfree;
|
|
|
880 c=0;
|
|
|
881 n=2;
|
|
|
882 slfree=lfree;
|
|
|
883 while(sym==CASE)
|
|
|
884 { getsym();
|
|
|
885 c=list2(cexpr(expr()),c);
|
|
|
886 n+=6;
|
|
|
887 checksym(COLON);
|
|
|
888 }
|
|
|
889 l=fwdlabel();
|
|
|
890 if (control)
|
|
|
891 { control=0;
|
|
|
892 if (n>127) jmp(l);
|
|
|
893 else printf("\tBRA\t_%d\n",l);
|
|
|
894 }
|
|
|
895 if (cslabel) fwddef(cslabel);
|
|
|
896 while(cadr(c))
|
|
|
897 { cmpdimm(car(c));
|
|
|
898 if((n-=6)>127) jcond(l,0);
|
|
|
899 else printf("\tBEQ\t_%d\n",l);
|
|
|
900 c=cadr(c);
|
|
|
901 }
|
|
|
902 lfree=slfree;
|
|
|
903 cmpdimm(car(c));
|
|
|
904 jcond(cslabel=fwdlabel(),1);
|
|
|
905 fwddef(l);
|
|
|
906 }
|
|
|
907 dodefault()
|
|
|
908 { getsym();
|
|
|
909 checksym(COLON);
|
|
|
910 if (dlabel) error(STERR);
|
|
|
911 if (!cslabel) jmp(cslabel = fwdlabel());
|
|
|
912 dlabel = backdef();
|
|
|
913 }
|
|
|
914 doreturn()
|
|
|
915 {int slfree;
|
|
|
916 if(getsym()==SM)
|
|
|
917 { getsym();
|
|
|
918 return2();
|
|
|
919 return;
|
|
|
920 }
|
|
|
921 slfree=lfree;
|
|
|
922 gexpr(expr());
|
|
|
923 lfree=slfree;
|
|
|
924 checksym(SM);
|
|
|
925 control=0;
|
|
|
926 switch(lvar)
|
|
|
927 {case 0:
|
|
|
928 ret("");
|
|
|
929 return;
|
|
|
930 case 2:
|
|
|
931 ret("X,");
|
|
|
932 return;
|
|
|
933 default:unlink();
|
|
|
934 return;
|
|
|
935 }
|
|
|
936 }
|
|
|
937 return2()
|
|
|
938 { control=0;
|
|
|
939 switch(lvar)
|
|
|
940 {case 0:
|
|
|
941 ret("");
|
|
|
942 return;
|
|
|
943 case 1:
|
|
|
944 ret("A,");
|
|
|
945 return;
|
|
|
946 case 2:
|
|
|
947 ret("D,");
|
|
|
948 return;
|
|
|
949 case 3:
|
|
|
950 ret("A,X,");
|
|
|
951 return;
|
|
|
952 case 4:
|
|
|
953 ret("D,X,");
|
|
|
954 return;
|
|
|
955 default:unlink();
|
|
|
956 return;
|
|
|
957 }
|
|
|
958 }
|
|
|
959 ret(reg)
|
|
|
960 char *reg;
|
|
|
961 { printf("\tPULS\t%sU,PC\n",reg);
|
|
|
962 }
|
|
|
963 unlink()
|
|
|
964 { printf("\tLEAS\t,U\n");
|
|
|
965 ret("");
|
|
|
966 }
|
|
|
967 dogoto()
|
|
|
968 {NMTBL *nptr0;
|
|
|
969 getsym();
|
|
|
970 nptr0=nptr;
|
|
|
971 checksym(IDENT);
|
|
|
972 if(nptr0->sc == BLABEL || nptr0->sc == FLABEL) jmp(nptr0->dsp);
|
|
|
973 else if(nptr0->sc == EMPTY)
|
|
|
974 { nptr0->sc = FLABEL;
|
|
|
975 jmp(nptr0->dsp = fwdlabel());
|
|
|
976 }
|
|
|
977 else error(STERR);
|
|
|
978 checksym(SM);
|
|
|
979 }
|
|
|
980 dolabel()
|
|
|
981 { if(nptr->sc == FLABEL) fwddef(nptr->dsp);
|
|
|
982 else if(nptr->sc != EMPTY) error(TYERR);
|
|
|
983 nptr->sc = BLABEL;
|
|
|
984 nptr->dsp = backdef();
|
|
|
985 getsym();
|
|
|
986 checksym(COLON);
|
|
|
987 }
|
|
|
988
|
|
|
989 expr()
|
|
|
990 { return(rvalue(expr0()));
|
|
|
991 }
|
|
|
992 expr0()
|
|
|
993 {int e;
|
|
|
994 e=expr1();
|
|
|
995 while(sym==COMMA) {getsym();e=list3(COMMA,e,rvalue(expr1()));}
|
|
|
996 return e;
|
|
|
997 }
|
|
|
998 expr1()
|
|
|
999 {int e1,e2,t,op;
|
|
|
1000 e1=expr2();
|
|
|
1001 switch (sym)
|
|
|
1002 {case ASS:
|
|
|
1003 lcheck(e1);
|
|
|
1004 t=type;
|
|
|
1005 getsym();
|
|
|
1006 e2=rvalue(expr1());
|
|
|
1007 if(t==CHAR) {type= INT;return(list3(CASS,e1,e2));}
|
|
|
1008 type=t;
|
|
|
1009 return(list3(ASS,e1,e2));
|
|
|
1010 case ADD+AS: case SUB+AS: case MUL+AS: case DIV+AS: case MOD+AS:
|
|
|
1011 case RSHIFT+AS: case LSHIFT+AS: case BAND+AS: case EOR+AS: case BOR+AS:
|
|
|
1012 op = sym-AS;
|
|
|
1013 lcheck(e1);
|
|
|
1014 t=type;
|
|
|
1015 getsym();
|
|
|
1016 e2=rvalue(expr1());
|
|
|
1017 if(!integral(type)) error(TYERR);
|
|
|
1018 if((t==UNSIGNED||type==UNSIGNED)&&
|
|
|
1019 (op==MUL||op==DIV||op==MOD||op==RSHIFT||op==LSHIFT))
|
|
|
1020 op=op+US;
|
|
|
1021 if(t==CHAR)
|
|
|
1022 { type= INT;
|
|
|
1023 return(list4(CASSOP,e1,e2,op));
|
|
|
1024 }
|
|
|
1025 type=t;
|
|
|
1026 if(integral(t)) return(list4(ASSOP,e1,e2,op));
|
|
|
1027 if((op!=ADD&&op!=SUB)||car(t)!=POINTER) error(TYERR);
|
|
|
1028 e2=binop(MUL,e2,list2(CONST,size(cadr(t))),INT,UNSIGNED);
|
|
|
1029 type=t;
|
|
|
1030 return list4(ASSOP,e1,e2,op);
|
|
|
1031 default:
|
|
|
1032 return(e1);
|
|
|
1033 }
|
|
|
1034 }
|
|
|
1035 expr2()
|
|
|
1036 {int e1,e2,e3,t;
|
|
|
1037 e1=expr3();
|
|
|
1038 if(sym==COND)
|
|
|
1039 { e1=rvalue(e1);
|
|
|
1040 getsym();
|
|
|
1041 e2=rvalue(expr2());
|
|
|
1042 t=type;
|
|
|
1043 checksym(COLON);
|
|
|
1044 e3=rvalue(expr2());
|
|
|
1045 if(car(e1)==CONST)
|
|
|
1046 if(cadr(e1)) {type=t;return e2;}
|
|
|
1047 else return e3;
|
|
|
1048 if(type==INT||t!=INT&&type==UNSIGNED) type=t;
|
|
|
1049 return(list4(COND,e1,e2,e3));
|
|
|
1050 }
|
|
|
1051 return(e1);
|
|
|
1052 }
|
|
|
1053 expr3()
|
|
|
1054 {int e;
|
|
|
1055 e=expr4();
|
|
|
1056 while(sym==LOR)
|
|
|
1057 { e=rvalue(e);
|
|
|
1058 getsym();
|
|
|
1059 e=list3(LOR,e,rvalue(expr4()));
|
|
|
1060 type= INT;
|
|
|
1061 }
|
|
|
1062 return(e);
|
|
|
1063 }
|
|
|
1064 expr4()
|
|
|
1065 {int e;
|
|
|
1066 e=expr5();
|
|
|
1067 while(sym==LAND)
|
|
|
1068 { e=rvalue(e);
|
|
|
1069 getsym();
|
|
|
1070 e=list3(LAND,e,rvalue(expr5()));
|
|
|
1071 type= INT;
|
|
|
1072 }
|
|
|
1073 return(e);
|
|
|
1074 }
|
|
|
1075 expr5()
|
|
|
1076 {int e1,e2,t;
|
|
|
1077 e1=expr6();
|
|
|
1078 while(sym==BOR)
|
|
|
1079 { e1=rvalue(e1);
|
|
|
1080 t=type;
|
|
|
1081 getsym();
|
|
|
1082 e2=rvalue(expr6());
|
|
|
1083 e1=binop(BOR,e1,e2,t,type);
|
|
|
1084 }
|
|
|
1085 return(e1);
|
|
|
1086 }
|
|
|
1087 expr6()
|
|
|
1088 {int e1,e2,t;
|
|
|
1089 e1=expr7();
|
|
|
1090 while(sym==EOR)
|
|
|
1091 { e1=rvalue(e1);
|
|
|
1092 t=type;
|
|
|
1093 getsym();
|
|
|
1094 e2=rvalue(expr7());
|
|
|
1095 e1=binop(EOR,e1,e2,t,type);
|
|
|
1096 }
|
|
|
1097 return(e1);
|
|
|
1098 }
|
|
|
1099 expr7()
|
|
|
1100 {int e1,e2,t;
|
|
|
1101 e1=expr8();
|
|
|
1102 while(sym==BAND)
|
|
|
1103 { e1=rvalue(e1);
|
|
|
1104 t=type;
|
|
|
1105 getsym();
|
|
|
1106 e2=rvalue(expr8());
|
|
|
1107 e1=binop(BAND,e1,e2,t,type);
|
|
|
1108 }
|
|
|
1109 return(e1);
|
|
|
1110 }
|
|
|
1111 expr8()
|
|
|
1112 {int e,op;
|
|
|
1113 e=expr9();
|
|
|
1114 while((op=sym)==EQ||op==NEQ)
|
|
|
1115 { e=rvalue(e);
|
|
|
1116 getsym();
|
|
|
1117 e=list3(op,e,rvalue(expr9()));
|
|
|
1118 type= INT;
|
|
|
1119 }
|
|
|
1120 return e;
|
|
|
1121 }
|
|
|
1122 expr9()
|
|
|
1123 {int e1,e2,t,op;
|
|
|
1124 e1=expr10();
|
|
|
1125 while((op=sym)==GT||op==GE||op==LT||op==LE)
|
|
|
1126 { e1=rvalue(e1);
|
|
|
1127 t=type;
|
|
|
1128 getsym();
|
|
|
1129 e2=rvalue(expr10());
|
|
|
1130 if(t==INT&&type==INT) e1=list3(op,e1,e2);
|
|
|
1131 else e1=list3(op+US,e1,e2);
|
|
|
1132 type= INT;
|
|
|
1133 }
|
|
|
1134 return e1;
|
|
|
1135 }
|
|
|
1136 expr10()
|
|
|
1137 {int e1,e2,t,op;
|
|
|
1138 e1=expr11();
|
|
|
1139 while((op=sym)==RSHIFT||op==LSHIFT)
|
|
|
1140 { e1=rvalue(e1);
|
|
|
1141 t=type;
|
|
|
1142 getsym();
|
|
|
1143 e2=rvalue(expr11());
|
|
|
1144 e1=binop(op,e1,e2,t,type);
|
|
|
1145 }
|
|
|
1146 return e1;
|
|
|
1147 }
|
|
|
1148 expr11()
|
|
|
1149 {int e1,e2,t,op;
|
|
|
1150 e1=expr12();
|
|
|
1151 while((op=sym)==ADD||op==SUB)
|
|
|
1152 { e1=rvalue(e1);
|
|
|
1153 t=type;
|
|
|
1154 getsym();
|
|
|
1155 e2=rvalue(expr12());
|
|
|
1156 e1=binop(op,e1,e2,t,type);
|
|
|
1157 }
|
|
|
1158 return e1;
|
|
|
1159 }
|
|
|
1160 expr12()
|
|
|
1161 {int e1,e2,t,op;
|
|
|
1162 e1=expr13();
|
|
|
1163 while((op=sym)==MUL||op==DIV||op==MOD)
|
|
|
1164 { e1=rvalue(e1);
|
|
|
1165 t=type;
|
|
|
1166 getsym();
|
|
|
1167 e2=rvalue(expr13());
|
|
|
1168 e1=binop(op,e1,e2,t,type);
|
|
|
1169 }
|
|
|
1170 return e1;
|
|
|
1171 }
|
|
|
1172 expr13()
|
|
|
1173 {int e,op;
|
|
|
1174 switch (op = sym)
|
|
|
1175 {case INC: case DEC:
|
|
|
1176 getsym();
|
|
|
1177 lcheck(e=expr13());
|
|
|
1178 if(type==CHAR)
|
|
|
1179 { type= INT;
|
|
|
1180 return(list2(op==INC?CPREINC:CPREDEC,e));
|
|
|
1181 }
|
|
|
1182 if(integral(type))
|
|
|
1183 return(list3(PREINC,e,op==INC?1:-1));
|
|
|
1184 if(car(type)!=POINTER) error(TYERR);
|
|
|
1185 return(list3(PREINC,e,
|
|
|
1186 op==INC?size(cadr(type)):-size(cadr(type)) ));
|
|
|
1187 case MUL:
|
|
|
1188 getsym();
|
|
|
1189 e=rvalue(expr13());
|
|
|
1190 return(indop(e));
|
|
|
1191 case BAND:
|
|
|
1192 getsym();
|
|
|
1193 switch(car(e=expr13()))
|
|
|
1194 {case INDIRECT:
|
|
|
1195 e=cadr(e);
|
|
|
1196 break;
|
|
|
1197 case GVAR:
|
|
|
1198 case LVAR:
|
|
|
1199 e=list2(ADDRESS,e);
|
|
|
1200 break;
|
|
|
1201 case FNAME:
|
|
|
1202 return e;
|
|
|
1203 default:error(LVERR);
|
|
|
1204 }
|
|
|
1205 type=list2(POINTER,type);
|
|
|
1206 return e;
|
|
|
1207 case SUB:
|
|
|
1208 getsym();
|
|
|
1209 e=rvalue(expr13());
|
|
|
1210 if(!integral(type)) error(TYERR);
|
|
|
1211 return(car(e)==CONST?list2(CONST,-cadr(e)):list2(MINUS,e));
|
|
|
1212 case BNOT:
|
|
|
1213 getsym();
|
|
|
1214 e=rvalue(expr13());
|
|
|
1215 if(!integral(type)) error(TYERR);
|
|
|
1216 return(car(e)==CONST?list2(CONST,~cadr(e)):list2(BNOT,e));
|
|
|
1217 case LNOT:
|
|
|
1218 getsym();
|
|
|
1219 return(list2(LNOT,rvalue(expr13())));
|
|
|
1220 case SIZEOF:
|
|
|
1221 if(getsym()==LPAR)
|
|
|
1222 if(typeid(getsym()))
|
|
|
1223 { e=list2(CONST,size(typename()));
|
|
|
1224 type=INT;
|
|
|
1225 checksym(RPAR);
|
|
|
1226 return e;
|
|
|
1227 }
|
|
|
1228 else
|
|
|
1229 { e=expr0();
|
|
|
1230 checksym(RPAR);
|
|
|
1231 expr16(e);
|
|
|
1232 if(sym==INC||sym==DEC)
|
|
|
1233 { getsym();
|
|
|
1234 if(type==CHAR) type=INT;
|
|
|
1235 else if(!scalar(type))
|
|
|
1236 error(TYERR);
|
|
|
1237 }
|
|
|
1238 }
|
|
|
1239 else expr13();
|
|
|
1240 e=list2(CONST,size(type));
|
|
|
1241 type=INT;
|
|
|
1242 return e;
|
|
|
1243 }
|
|
|
1244 e=expr14();
|
|
|
1245 if((op=sym)==INC||op==DEC)
|
|
|
1246 { lcheck(e);
|
|
|
1247 getsym();
|
|
|
1248 if(type==CHAR)
|
|
|
1249 { type= INT;
|
|
|
1250 return(list2(op==INC?CPOSTINC:CPOSTDEC,e));
|
|
|
1251 }
|
|
|
1252 if(integral(type))
|
|
|
1253 return(list3(POSTINC,e,op==INC?1:-1));
|
|
|
1254 if(car(type)!=POINTER) error(TYERR);
|
|
|
1255 return (list3(POSTINC,e,
|
|
|
1256 op == INC ? size(cadr(type)): -size(cadr(type)) ));
|
|
|
1257 }
|
|
|
1258 return e;
|
|
|
1259 }
|
|
|
1260 expr14()
|
|
|
1261 {int e1,t;
|
|
|
1262 switch(sym)
|
|
|
1263 {case IDENT:
|
|
|
1264 switch(nptr->sc)
|
|
|
1265 {case GVAR:
|
|
|
1266 e1=list2(GVAR,nptr->dsp);
|
|
|
1267 type=nptr->ty;
|
|
|
1268 getsym();
|
|
|
1269 break;
|
|
|
1270 case LVAR:
|
|
|
1271 e1=list2(LVAR,nptr->dsp);
|
|
|
1272 type=nptr->ty;
|
|
|
1273 getsym();
|
|
|
1274 break;
|
|
|
1275 case FUNCTION:
|
|
|
1276 e1=list2(FNAME,(int)nptr);
|
|
|
1277 type=list2(FUNCTION,nptr->ty);
|
|
|
1278 getsym();
|
|
|
1279 break;
|
|
|
1280 case EMPTY:
|
|
|
1281 if(getsym()==LPAR)
|
|
|
1282 { nptr->sc = FUNCTION;
|
|
|
1283 nptr->ty= INT;
|
|
|
1284 type= list2(FUNCTION,INT);
|
|
|
1285 e1=expr15(list2(FNAME,(int)nptr));
|
|
|
1286 break;
|
|
|
1287 }
|
|
|
1288 default:error(UDERR);
|
|
|
1289 }
|
|
|
1290 break;
|
|
|
1291 case STRING:
|
|
|
1292 e1=list3(STRING,(int)sptr,symval);
|
|
|
1293 type=list3(ARRAY,CHAR,symval);
|
|
|
1294 getsym();
|
|
|
1295 break;
|
|
|
1296 case CONST:
|
|
|
1297 type= INT;
|
|
|
1298 e1=list2(CONST,symval);
|
|
|
1299 getsym();
|
|
|
1300 break;
|
|
|
1301 case LPAR:
|
|
|
1302 if(typeid(getsym()))
|
|
|
1303 { t=typename();
|
|
|
1304 checksym(RPAR);
|
|
|
1305 e1=expr13();
|
|
|
1306 type=t;
|
|
|
1307 return e1;
|
|
|
1308 }
|
|
|
1309 e1=expr0();
|
|
|
1310 checksym(RPAR);
|
|
|
1311 break;
|
|
|
1312 default:error(EXERR);
|
|
|
1313 }
|
|
|
1314 return expr16(e1);
|
|
|
1315 }
|
|
|
1316 expr16(e1)
|
|
|
1317 int e1;
|
|
|
1318 {int e2,t;
|
|
|
1319 while(1)
|
|
|
1320 if(sym==LBRA)
|
|
|
1321 { e1=rvalue(e1);
|
|
|
1322 t=type;
|
|
|
1323 getsym();
|
|
|
1324 e2=rvalue(expr0());
|
|
|
1325 checksym(RBRA);
|
|
|
1326 e1=binop(ADD,e1,e2,t,type);
|
|
|
1327 e1=indop(e1);
|
|
|
1328 }
|
|
|
1329 else if(sym==LPAR) e1=expr15(e1);
|
|
|
1330 else if(sym==PERIOD) e1=strop(e1);
|
|
|
1331 else if(sym==ARROW) e1=strop(indop(rvalue(e1)));
|
|
|
1332 else break;
|
|
|
1333 if(car(e1)==FNAME) type=list2(POINTER,type);
|
|
|
1334 return e1;
|
|
|
1335 }
|
|
|
1336 rvalue(e)
|
|
|
1337 int e;
|
|
|
1338 { if(type==CHAR)
|
|
|
1339 { type= INT;
|
|
|
1340 switch(car(e))
|
|
|
1341 {case GVAR:
|
|
|
1342 return(list2(CRGVAR,cadr(e)));
|
|
|
1343 case LVAR:
|
|
|
1344 return(list2(CRLVAR,cadr(e)));
|
|
|
1345 case INDIRECT:
|
|
|
1346 return(list2(CRINDIRECT,cadr(e)));
|
|
|
1347 default:return(e);
|
|
|
1348 }
|
|
|
1349 }
|
|
|
1350 if(!integral(type))
|
|
|
1351 if(car(type)==ARRAY)
|
|
|
1352 { type=list2(POINTER,cadr(type));
|
|
|
1353 if(car(e)==INDIRECT) return cadr(e);
|
|
|
1354 return list2(ADDRESS,e);
|
|
|
1355 }
|
|
|
1356 else if(car(type)!=POINTER) error(TYERR);
|
|
|
1357 switch(car(e))
|
|
|
1358 {case GVAR:
|
|
|
1359 return(list2(RGVAR,cadr(e)));
|
|
|
1360 case LVAR:
|
|
|
1361 return(list2(RLVAR,cadr(e)));
|
|
|
1362 case INDIRECT:
|
|
|
1363 return(list2(RINDIRECT,cadr(e)));
|
|
|
1364 default:return(e);
|
|
|
1365 }
|
|
|
1366 }
|
|
|
1367 lcheck(e)
|
|
|
1368 int e;
|
|
|
1369 { if(!scalar(type)||car(e)!=GVAR&&car(e)!=LVAR&&car(e)!=INDIRECT)
|
|
|
1370 error(LVERR);
|
|
|
1371 }
|
|
|
1372 indop(e)
|
|
|
1373 int e;
|
|
|
1374 { if(type!=INT&&type!=UNSIGNED)
|
|
|
1375 if(car(type)==POINTER) type=cadr(type);
|
|
|
1376 else error(TYERR);
|
|
|
1377 else type= CHAR;
|
|
|
1378 if(car(e)==ADDRESS) return(cadr(e));
|
|
|
1379 return(list2(INDIRECT,e));
|
|
|
1380 }
|
|
|
1381 strop(e)
|
|
|
1382 { getsym();
|
|
|
1383 if (sym!=IDENT||nptr->sc!=FIELD) error(TYERR);
|
|
|
1384 if (integral(type)||car(type)!=STRUCT && car(type)!=UNION)
|
|
|
1385 e=rvalue(e);
|
|
|
1386 type = nptr->ty;
|
|
|
1387 switch(car(e))
|
|
|
1388 {case GVAR:
|
|
|
1389 case LVAR:
|
|
|
1390 e=list2(car(e),cadr(e) + nptr->dsp);
|
|
|
1391 break;
|
|
|
1392 case INDIRECT:
|
|
|
1393 if(!nptr->dsp) break;
|
|
|
1394 e=list2(INDIRECT,list3(ADD,cadr(e),list2(CONST,nptr->dsp)));
|
|
|
1395 break;
|
|
|
1396 default:
|
|
|
1397 e=list2(INDIRECT,list3(ADD,e,list2(CONST,nptr->dsp)));
|
|
|
1398 }
|
|
|
1399 getsym();
|
|
|
1400 return e;
|
|
|
1401 }
|
|
|
1402 binop(op,e1,e2,t1,t2)
|
|
|
1403 int op,e1,e2,t1,t2;
|
|
|
1404 {int e;
|
|
|
1405 if(car(e1)==CONST&&car(e2)==CONST)
|
|
|
1406 { e1=cadr(e1);
|
|
|
1407 e2=cadr(e2);
|
|
|
1408 type= INT;
|
|
|
1409 switch(op)
|
|
|
1410 {case BOR:
|
|
|
1411 e=e1|e2;break;
|
|
|
1412 case EOR:
|
|
|
1413 e=e1^e2;break;
|
|
|
1414 case BAND:
|
|
|
1415 e=e1&e2;break;
|
|
|
1416 case ADD:
|
|
|
1417 if(integral(t1))
|
|
|
1418 { if(integral(t2))
|
|
|
1419 e=e1+e2;
|
|
|
1420 else
|
|
|
1421 { if(car(t2)!=POINTER) error(TYERR);
|
|
|
1422 e=size(cadr(t2))*e1+e2;
|
|
|
1423 type=t2;
|
|
|
1424 }
|
|
|
1425 }
|
|
|
1426 else
|
|
|
1427 { if(car(t1)!=POINTER) error(TYERR);
|
|
|
1428 e=e1+size(cadr(t1))*e2;
|
|
|
1429 type=t1;
|
|
|
1430 }
|
|
|
1431 break;
|
|
|
1432 case SUB:
|
|
|
1433 if(integral(t1))
|
|
|
1434 e=e1-e2;
|
|
|
1435 else
|
|
|
1436 { if(car(t1)!=POINTER) error(TYERR);
|
|
|
1437 e=e1-size(cadr(t1))*e2;
|
|
|
1438 type=t1;
|
|
|
1439 }
|
|
|
1440 break;
|
|
|
1441 case MUL:
|
|
|
1442 e=e1*e2;break;
|
|
|
1443 case DIV:
|
|
|
1444 if(!e2) error(EXERR);e=e1/e2;break;
|
|
|
1445 case MOD:
|
|
|
1446 if(!e2) error(EXERR);e=e1%e2;break;
|
|
|
1447 case RSHIFT:
|
|
|
1448 e=e1>>e2;break;
|
|
|
1449 case LSHIFT:
|
|
|
1450 e=e1<<e2;
|
|
|
1451 }
|
|
|
1452 return list2(CONST,e);
|
|
|
1453 }
|
|
|
1454 if((op==ADD||op==MUL||op==BOR||op==EOR||op==BAND)&&
|
|
|
1455 (car(e1)==CONST||car(e2)!=CONST&&
|
|
|
1456 (car(e1)==RGVAR||car(e1)==RLVAR)))
|
|
|
1457 {e=e1;e1=e2;e2=e;e=t1;t1=t2;t2=e;}
|
|
|
1458 if(op==ADD)
|
|
|
1459 { if(integral(t1))
|
|
|
1460 { if(integral(t2))
|
|
|
1461 { if(t1==INT) type=t2;else type=t1;
|
|
|
1462 return(list3(ADD,e1,e2));
|
|
|
1463 }
|
|
|
1464 if(car(t2)!=POINTER) error(TYERR);
|
|
|
1465 e=binop(MUL,e1,list2(CONST,size(cadr(t2))),t1,INT);
|
|
|
1466 type=t2;
|
|
|
1467 return(list3(ADD,e,e2));
|
|
|
1468 }
|
|
|
1469 if(car(t1)!=POINTER||!integral(t2)) error(TYERR);
|
|
|
1470 e=binop(MUL,e2,list2(CONST,size(cadr(t1))),t2,INT);
|
|
|
1471 type=t1;
|
|
|
1472 if(car(e1)==ADDRESS&&car(e)==CONST)
|
|
|
1473 return(list2(ADDRESS,list2(car(cadr(e1)),
|
|
|
1474 cadr(cadr(e1))+cadr(e))));
|
|
|
1475 return(list3(ADD,e1,e));
|
|
|
1476 }
|
|
|
1477 if(op==SUB)
|
|
|
1478 { if(integral(t1))
|
|
|
1479 { if(!integral(t2)) error(TYERR);
|
|
|
1480 if(t1==INT) type=t2;else type=t1;
|
|
|
1481 return(list3(SUB,e1,e2));
|
|
|
1482 }
|
|
|
1483 if(car(t1)!=POINTER) error(TYERR);
|
|
|
1484 if(integral(t2))
|
|
|
1485 { e=binop(MUL,e2,list2(CONST,size(cadr(t1))),t2,INT);
|
|
|
1486 type=t1;
|
|
|
1487 return(list3(SUB,e1,e));
|
|
|
1488 }
|
|
|
1489 if(car(t2)!=POINTER)
|
|
|
1490 error(TYERR);
|
|
|
1491 compatible(t1,t2);
|
|
|
1492 e=list3(SUB,e1,e2);
|
|
|
1493 e=binop(DIV,e,list2(CONST,size(cadr(t1))),UNSIGNED,INT);
|
|
|
1494 type= INT;
|
|
|
1495 return e;
|
|
|
1496 }
|
|
|
1497 if(!integral(t1)||!integral(t2)) error(TYERR);
|
|
|
1498 if(t1==INT) type=t2;else type=t1;
|
|
|
1499 if((op==MUL||op==DIV)&&car(e2)==CONST&&cadr(e2)==1) return e1;
|
|
|
1500 if(op==BOR||op==EOR||op==BAND) return(list3(op,e1,e2));
|
|
|
1501 return(list3(type==UNSIGNED?op+US:op,e1,e2));
|
|
|
1502 }
|
|
|
1503 expr15(e1)
|
|
|
1504 int e1;
|
|
|
1505 {int t,args;
|
|
|
1506 t=type;
|
|
|
1507 if(integral(t)||car(t)!=FUNCTION)
|
|
|
1508 error(TYERR);
|
|
|
1509 t=cadr(t);
|
|
|
1510 getsym();
|
|
|
1511 args=0;
|
|
|
1512 while(sym!=RPAR)
|
|
|
1513 { args=list2(rvalue(expr1()),args);
|
|
|
1514 if(sym!=COMMA) break;
|
|
|
1515 getsym();
|
|
|
1516 }
|
|
|
1517 checksym(RPAR);
|
|
|
1518 if(t==CHAR) type= INT;else type=t;
|
|
|
1519 return list3(FUNCTION,e1,args);
|
|
|
1520 }
|
|
|
1521 typeid(s)
|
|
|
1522 int s;
|
|
|
1523 { return (integral(s) || s==SHORT || s==LONG || s==STRUCT || s==UNION ||
|
|
|
1524 (s==IDENT && nptr->sc==TYPE));
|
|
|
1525 }
|
|
|
1526 typename()
|
|
|
1527 {int t;
|
|
|
1528 type=t=typespec();
|
|
|
1529 ndecl0();
|
|
|
1530 reverse(t);
|
|
|
1531 return type;
|
|
|
1532 }
|
|
|
1533 ndecl0()
|
|
|
1534 { if(sym==MUL)
|
|
|
1535 { getsym();
|
|
|
1536 return type=list2(POINTER,ndecl0());
|
|
|
1537 }
|
|
|
1538 return ndecl1();
|
|
|
1539 }
|
|
|
1540 ndecl1()
|
|
|
1541 {int i,t;
|
|
|
1542 if(sym==LPAR)
|
|
|
1543 if(getsym()==RPAR) {type=list2(FUNCTION,type); getsym();}
|
|
|
1544 else
|
|
|
1545 { ndecl0();
|
|
|
1546 checksym(RPAR);
|
|
|
1547 }
|
|
|
1548 while(1)
|
|
|
1549 if(sym==LBRA)
|
|
|
1550 { getsym();
|
|
|
1551 t=type;
|
|
|
1552 i=cexpr(expr());
|
|
|
1553 checksym(RBRA);
|
|
|
1554 type=list3(ARRAY,t,i);
|
|
|
1555 }
|
|
|
1556 else if(sym==LPAR)
|
|
|
1557 { getsym();
|
|
|
1558 checksym(RPAR);
|
|
|
1559 type=list2(FUNCTION,type);
|
|
|
1560 }
|
|
|
1561 else return type;
|
|
|
1562 }
|
|
|
1563
|
|
|
1564 bexpr(e1,cond,l1)
|
|
|
1565 int e1,l1;
|
|
|
1566 char cond;
|
|
|
1567 {int e2,l2;
|
|
|
1568 if (chk) return;
|
|
|
1569 e2=cadr(e1);
|
|
|
1570 switch(car(e1))
|
|
|
1571 {case LNOT:
|
|
|
1572 bexpr(e2,!cond,l1);
|
|
|
1573 return;
|
|
|
1574 case GT:
|
|
|
1575 rexpr(e1,l1,cond?"GT":"LE");
|
|
|
1576 return;
|
|
|
1577 case UGT:
|
|
|
1578 rexpr(e1,l1,cond?"HI":"LS");
|
|
|
1579 return;
|
|
|
1580 case GE:
|
|
|
1581 rexpr(e1,l1,cond?"GE":"LT");
|
|
|
1582 return;
|
|
|
1583 case UGE:
|
|
|
1584 rexpr(e1,l1,cond?"HS":"LO");
|
|
|
1585 return;
|
|
|
1586 case LT:
|
|
|
1587 rexpr(e1,l1,cond?"LT":"GE");
|
|
|
1588 return;
|
|
|
1589 case ULT:
|
|
|
1590 rexpr(e1,l1,cond?"LO":"HS");
|
|
|
1591 return;
|
|
|
1592 case LE:
|
|
|
1593 rexpr(e1,l1,cond?"LE":"GT");
|
|
|
1594 return;
|
|
|
1595 case ULE:
|
|
|
1596 rexpr(e1,l1,cond?"LS":"HI");
|
|
|
1597 return;
|
|
|
1598 case EQ:
|
|
|
1599 rexpr(e1,l1,cond?"EQ":"NE");
|
|
|
1600 return;
|
|
|
1601 case NEQ:
|
|
|
1602 rexpr(e1,l1,cond?"NE":"EQ");
|
|
|
1603 return;
|
|
|
1604 case LAND:
|
|
|
1605 bexpr(e2,0,cond?(l2=fwdlabel()):l1);
|
|
|
1606 bexpr(caddr(e1),cond,l1);
|
|
|
1607 if(cond) fwddef(l2);
|
|
|
1608 return;
|
|
|
1609 case LOR:
|
|
|
1610 bexpr(e2,1,cond?l1:(l2=fwdlabel()));
|
|
|
1611 bexpr(caddr(e1),cond,l1);
|
|
|
1612 if(!cond) fwddef(l2);
|
|
|
1613 return;
|
|
|
1614 case CRGVAR:
|
|
|
1615 ldby(e2);
|
|
|
1616 jcond(l1,cond);
|
|
|
1617 return;
|
|
|
1618 case CRLVAR:
|
|
|
1619 ldbu(e2);
|
|
|
1620 jcond(l1,cond);
|
|
|
1621 return;
|
|
|
1622 case CONST:
|
|
|
1623 if(cond&&e2||!cond&&!e2) jmp(l1);
|
|
|
1624 return;
|
|
|
1625 case RGVAR:
|
|
|
1626 case RLVAR:
|
|
|
1627 case CRINDIRECT:
|
|
|
1628 gexpr(e1);
|
|
|
1629 jcond(l1,cond);
|
|
|
1630 return;
|
|
|
1631 default:gexpr(e1);
|
|
|
1632 subdim(0);
|
|
|
1633 jcond(l1,cond);
|
|
|
1634 return;
|
|
|
1635 }
|
|
|
1636 }
|
|
|
1637 rexpr(e1,l1,s)
|
|
|
1638 int e1,l1;
|
|
|
1639 char *s;
|
|
|
1640 { gexpr(list3(SUB,cadr(e1),caddr(e1)));
|
|
|
1641 printf("\tLB%s\t_%d\n",s,l1);
|
|
|
1642 }
|
|
|
1643 jcond(l,cond)
|
|
|
1644 int l;
|
|
|
1645 char cond;
|
|
|
1646 { printf("\tLB%s\t_%d\n",cond?"NE":"EQ",l);
|
|
|
1647 }
|
|
|
1648 jmp(l)
|
|
|
1649 int l;
|
|
|
1650 { control=0;
|
|
|
1651 printf("\tLBRA\t_%d\n",l);
|
|
|
1652 }
|
|
|
1653 fwdlabel()
|
|
|
1654 { return labelno++;
|
|
|
1655 }
|
|
|
1656 fwddef(l)
|
|
|
1657 int l;
|
|
|
1658 { control=1;
|
|
|
1659 printf("_%d\n",l);
|
|
|
1660 }
|
|
|
1661 backdef()
|
|
|
1662 { control=1;
|
|
|
1663 printf("_%d\n",labelno);
|
|
|
1664 return labelno++;
|
|
|
1665 }
|
|
|
1666
|
|
|
1667 gexpr(e1)
|
|
|
1668 int e1;
|
|
|
1669 {int e2,e3;
|
|
|
1670 if (chk) return;
|
|
|
1671 e2 = cadr(e1);
|
|
|
1672 switch (car(e1))
|
|
|
1673 {case GVAR:
|
|
|
1674 leaxy(e2);
|
|
|
1675 return;
|
|
|
1676 case RGVAR:
|
|
|
1677 lddy(e2);
|
|
|
1678 return;
|
|
|
1679 case CRGVAR:
|
|
|
1680 ldby(e2);
|
|
|
1681 sex();
|
|
|
1682 return;
|
|
|
1683 case LVAR:
|
|
|
1684 leaxu(e2);
|
|
|
1685 return;
|
|
|
1686 case RLVAR:
|
|
|
1687 lddu(e2);
|
|
|
1688 return;
|
|
|
1689 case CRLVAR:
|
|
|
1690 ldbu(e2);
|
|
|
1691 sex();
|
|
|
1692 return;
|
|
|
1693 case FNAME:
|
|
|
1694 leaxpcr((NMTBL *)e2);
|
|
|
1695 tfrxd();
|
|
|
1696 return;
|
|
|
1697 case CONST:
|
|
|
1698 if (e2) lddim(e2);
|
|
|
1699 else clrd();
|
|
|
1700 return;
|
|
|
1701 case STRING:
|
|
|
1702 string(e1);
|
|
|
1703 return;
|
|
|
1704 case FUNCTION:
|
|
|
1705 function(e1);
|
|
|
1706 return;
|
|
|
1707 case INDIRECT:
|
|
|
1708 indirect(e1);
|
|
|
1709 return;
|
|
|
1710 case RINDIRECT: case CRINDIRECT:
|
|
|
1711 rindirect(e1);
|
|
|
1712 return;
|
|
|
1713 case ADDRESS:
|
|
|
1714 gexpr(e2);
|
|
|
1715 tfrxd();
|
|
|
1716 return;
|
|
|
1717 case MINUS:
|
|
|
1718 gexpr(e2);
|
|
|
1719 printf("\tNEGA\n\tNEGB\n\tSBCA\t#0\n");
|
|
|
1720 return;
|
|
|
1721 case BNOT:
|
|
|
1722 gexpr(e2);
|
|
|
1723 printf("\tCOMA\n\tCOMB\n");
|
|
|
1724 return;
|
|
|
1725 case PREINC:
|
|
|
1726 switch (car(e2))
|
|
|
1727 {case GVAR: case LVAR:
|
|
|
1728 ldd(e2);
|
|
|
1729 adddim(caddr(e1));
|
|
|
1730 std(e2);
|
|
|
1731 return;
|
|
|
1732 default:
|
|
|
1733 gexpr(e2);
|
|
|
1734 lddx();
|
|
|
1735 adddim(caddr(e1));
|
|
|
1736 stdx();
|
|
|
1737 return;
|
|
|
1738 }
|
|
|
1739 case POSTINC:
|
|
|
1740 switch (car(e2))
|
|
|
1741 {case GVAR: case LVAR:
|
|
|
1742 ldd(e2);
|
|
|
1743 adddim(e3 = caddr(e1));
|
|
|
1744 std(e2);
|
|
|
1745 subdim(e3);
|
|
|
1746 return;
|
|
|
1747 default:
|
|
|
1748 gexpr(e2);
|
|
|
1749 lddx();
|
|
|
1750 adddim(e3=caddr(e1));
|
|
|
1751 stdx();
|
|
|
1752 subdim(e3);
|
|
|
1753 return;
|
|
|
1754 }
|
|
|
1755 case CPOSTINC:
|
|
|
1756 gexpr(e2);
|
|
|
1757 ldbx();
|
|
|
1758 incx();
|
|
|
1759 sex();
|
|
|
1760 return;
|
|
|
1761 case CPREINC:
|
|
|
1762 gexpr(e2);
|
|
|
1763 incx();
|
|
|
1764 ldbx();
|
|
|
1765 sex();
|
|
|
1766 return;
|
|
|
1767 case CPOSTDEC:
|
|
|
1768 gexpr(e2);
|
|
|
1769 ldbx();
|
|
|
1770 decx();
|
|
|
1771 sex();
|
|
|
1772 return;
|
|
|
1773 case CPREDEC:
|
|
|
1774 gexpr(e2);
|
|
|
1775 decx();
|
|
|
1776 ldbx();
|
|
|
1777 sex();
|
|
|
1778 return;
|
|
|
1779 case MUL: case UMUL:
|
|
|
1780 if (car(e3=caddr(e1)) == CONST)
|
|
|
1781 { if (0 < (e3 = cadr(e3)) && e3 <= 10)
|
|
|
1782 { gexpr(e2);
|
|
|
1783 switch (e3)
|
|
|
1784 {case 8:
|
|
|
1785 asld();
|
|
|
1786 case 4:
|
|
|
1787 asld();
|
|
|
1788 case 2:
|
|
|
1789 asld();
|
|
|
1790 case 1:
|
|
|
1791 return;
|
|
|
1792 case 10:
|
|
|
1793 asld();
|
|
|
1794 case 5:
|
|
|
1795 pushd();
|
|
|
1796 asld();
|
|
|
1797 asld();
|
|
|
1798 addds();
|
|
|
1799 return;
|
|
|
1800 case 6:
|
|
|
1801 asld();
|
|
|
1802 case 3:
|
|
|
1803 pushd();
|
|
|
1804 asld();
|
|
|
1805 addds();
|
|
|
1806 return;
|
|
|
1807 case 9: case 7:
|
|
|
1808 pushd();
|
|
|
1809 asld();
|
|
|
1810 asld();
|
|
|
1811 asld();
|
|
|
1812 if (e3 == 9) addds(); else subds();
|
|
|
1813 return;
|
|
|
1814 }
|
|
|
1815 }
|
|
|
1816 }
|
|
|
1817 case DIV: case UDIV: case MOD: case UMOD:
|
|
|
1818 case LSHIFT: case ULSHIFT: case RSHIFT: case URSHIFT:
|
|
|
1819 binexpr(e1);
|
|
|
1820 return;
|
|
|
1821 case ADD: case SUB: case BAND: case EOR: case BOR:
|
|
|
1822 machinop(e1);
|
|
|
1823 return;
|
|
|
1824 case COND:
|
|
|
1825 e2=fwdlabel();
|
|
|
1826 bexpr(cadr(e1),0,e2);
|
|
|
1827 gexpr(caddr(e1));
|
|
|
1828 jmp(e3=fwdlabel());
|
|
|
1829 fwddef(e2);
|
|
|
1830 gexpr(cadddr(e1));
|
|
|
1831 fwddef(e3);
|
|
|
1832 return;
|
|
|
1833 case ASS: case CASS:
|
|
|
1834 assign(e1);
|
|
|
1835 return;
|
|
|
1836 case ASSOP: case CASSOP:
|
|
|
1837 assop(e1);
|
|
|
1838 return;
|
|
|
1839 case COMMA:
|
|
|
1840 gexpr(e2);
|
|
|
1841 gexpr(caddr(e1));
|
|
|
1842 return;
|
|
|
1843 default:
|
|
|
1844 bexpr(e1,1,e2=fwdlabel());
|
|
|
1845 clrd();
|
|
|
1846 printf("\tBRA\t*+5\n");
|
|
|
1847 fwddef(e2);
|
|
|
1848 lddim(1);
|
|
|
1849 }
|
|
|
1850 }
|
|
|
1851 string(e1)
|
|
|
1852 int e1;
|
|
|
1853 {char *s;
|
|
|
1854 int i,l,lb;
|
|
|
1855 s=(char *)cadr(e1);
|
|
|
1856 lb=fwdlabel();
|
|
|
1857 if ((l = caddr(e1)) < 128)
|
|
|
1858 printf("\tLEAX\t2,PC\n\tBRA\t_%d\n",lb);
|
|
|
1859 else
|
|
|
1860 printf("\tLEAX\t3,PC\n\tLBRA\t_%d\n",lb);
|
|
|
1861 do
|
|
|
1862 { printf("\tFCB\t%d",*s++);
|
|
|
1863 for (i=8; --l && --i;) printf(",%d",*s++);
|
|
|
1864 printf("\n");
|
|
|
1865 }
|
|
|
1866 while (l);
|
|
|
1867 fwddef(lb);
|
|
|
1868 }
|
|
|
1869 function(e1)
|
|
|
1870 int e1;
|
|
|
1871 {int e2,e3,e4,e5,nargs;
|
|
|
1872 NMTBL *n;
|
|
|
1873 e2 = cadr(e1);
|
|
|
1874 nargs = 0;
|
|
|
1875 for (e3 = caddr(e1); e3; e3 = cadr(e3))
|
|
|
1876 { n=(NMTBL *)(e5=(cadr(e4 = car(e3))));
|
|
|
1877 switch(car(e4))
|
|
|
1878 {case FNAME:
|
|
|
1879 leaxpcr(n);
|
|
|
1880 pushx();
|
|
|
1881 break;
|
|
|
1882 case ADDRESS:
|
|
|
1883 gexpr(e5);
|
|
|
1884 pushx();
|
|
|
1885 break;
|
|
|
1886 default:gexpr(e4);
|
|
|
1887 pushd();
|
|
|
1888 }
|
|
|
1889 ++nargs;
|
|
|
1890 }
|
|
|
1891 if (car(e2) == FNAME)
|
|
|
1892 { n=(NMTBL *)cadr(e2);
|
|
|
1893 printf("\tLBSR\t%s\n",n->nm);
|
|
|
1894 }
|
|
|
1895 else
|
|
|
1896 { gexpr(e2);
|
|
|
1897 printf("\tJSR\t,X\n");
|
|
|
1898 }
|
|
|
1899 if (nargs) printf("\tLEAS\t%d,S\n",2*nargs);
|
|
|
1900 }
|
|
|
1901 indirect(e1)
|
|
|
1902 int e1;
|
|
|
1903 {int e2,e3,e4;
|
|
|
1904 e3 = cadr(e2 = cadr(e1));
|
|
|
1905 switch(car(e2))
|
|
|
1906 {case RGVAR: case RLVAR:
|
|
|
1907 ldx(e2);
|
|
|
1908 return;
|
|
|
1909 case ADD:
|
|
|
1910 if(car(e3)==ADDRESS)
|
|
|
1911 { gexpr(caddr(e2));
|
|
|
1912 gexpr(cadr(e3));
|
|
|
1913 opdx("LEAX");
|
|
|
1914 return;
|
|
|
1915 }
|
|
|
1916 switch(car(e4 = caddr(e2)))
|
|
|
1917 {case RGVAR: case RLVAR:
|
|
|
1918 gexpr(e3);
|
|
|
1919 ldx(e4);
|
|
|
1920 opdx("LEAX");
|
|
|
1921 return;
|
|
|
1922 }
|
|
|
1923 default:
|
|
|
1924 gexpr(e2);
|
|
|
1925 tfrdx();
|
|
|
1926 }
|
|
|
1927 }
|
|
|
1928
|
|
|
1929 machinop(e1)
|
|
|
1930 int e1;
|
|
|
1931 {int e2,e3;
|
|
|
1932 e2 = cadr(e1);
|
|
|
1933 switch (car(e3 = caddr(e1)))
|
|
|
1934 {case RGVAR: case RLVAR: case CONST:
|
|
|
1935 gexpr(e2);
|
|
|
1936 oprt(car(e1),e3);
|
|
|
1937 return;
|
|
|
1938 default:
|
|
|
1939 gexpr(e3);
|
|
|
1940 pushd();
|
|
|
1941 gexpr(e2);
|
|
|
1942 tosop(car(e1));
|
|
|
1943 return;
|
|
|
1944 }
|
|
|
1945 }
|
|
|
1946
|
|
|
1947 rindirect(e1)
|
|
|
1948 int e1;
|
|
|
1949 {char *op;
|
|
|
1950 int e2,e3,e4,byte,l;
|
|
|
1951 op = ((byte = (car(e1) == CRINDIRECT)) ? "LDB" : "LDD");
|
|
|
1952 e3 = cadr(e2 = cadr(e1));
|
|
|
1953 switch (car(e2))
|
|
|
1954 {case RGVAR: case RLVAR:
|
|
|
1955 indir(op,e2);
|
|
|
1956 sextend(byte);
|
|
|
1957 return;
|
|
|
1958 case ADD:
|
|
|
1959 if(car(e3)==ADDRESS)
|
|
|
1960 { gexpr(caddr(e2));
|
|
|
1961 gexpr(cadr(e3));
|
|
|
1962 opdx(op);
|
|
|
1963 sextend(byte);
|
|
|
1964 return;
|
|
|
1965 }
|
|
|
1966 switch(car(e4=caddr(e2)))
|
|
|
1967 {case RGVAR: case RLVAR:
|
|
|
1968 gexpr(e3);
|
|
|
1969 ldx(e4);
|
|
|
1970 opdx(op);
|
|
|
1971 sextend(byte);
|
|
|
1972 return;
|
|
|
1973 case CONST:
|
|
|
1974 switch (car(e3))
|
|
|
1975 {case RGVAR: case RLVAR:
|
|
|
1976 ldx(e3);
|
|
|
1977 indexx(op,cadr(e4));
|
|
|
1978 sextend(byte);
|
|
|
1979 return;
|
|
|
1980 }
|
|
|
1981 default:
|
|
|
1982 gexpr(e3);
|
|
|
1983 pushd();
|
|
|
1984 gexpr(e4);
|
|
|
1985 pulx();
|
|
|
1986 opdx(op);
|
|
|
1987 sextend(byte);
|
|
|
1988 return;
|
|
|
1989 }
|
|
|
1990 case PREINC:
|
|
|
1991 if ((l = caddr(e2)) == -1 || l == -2)
|
|
|
1992 switch (car(e3))
|
|
|
1993 {case GVAR: case LVAR:
|
|
|
1994 ldx(e3);
|
|
|
1995 predecx(op,l);
|
|
|
1996 stx(e3);
|
|
|
1997 sextend(byte);
|
|
|
1998 return;
|
|
|
1999 }
|
|
|
2000 break;
|
|
|
2001 case POSTINC:
|
|
|
2002 if ((l = caddr(e2)) == 1 || l == 2)
|
|
|
2003 switch (car(e3))
|
|
|
2004 {case GVAR: case LVAR:
|
|
|
2005 ldx(e3);
|
|
|
2006 postincx(op,l);
|
|
|
2007 stx(e3);
|
|
|
2008 sextend(byte);
|
|
|
2009 return;
|
|
|
2010 }
|
|
|
2011 break;
|
|
|
2012 }
|
|
|
2013 gexpr(e2);
|
|
|
2014 tfrdx();
|
|
|
2015 indexx(op,0);
|
|
|
2016 sextend(byte);
|
|
|
2017 }
|
|
|
2018 assign(e1)
|
|
|
2019 int e1;
|
|
|
2020 {char *op;
|
|
|
2021 int e2,e3,e4,e5,l;
|
|
|
2022 op = (car(e1) == CASS ? "STB" : "STD");
|
|
|
2023 e3 = cadr(e2 = cadr(e1));
|
|
|
2024 e4 = caddr(e1);
|
|
|
2025 switch(car(e2))
|
|
|
2026 {case GVAR: case LVAR:
|
|
|
2027 gexpr(e4);
|
|
|
2028 index(op,e2);
|
|
|
2029 return;
|
|
|
2030 case INDIRECT:
|
|
|
2031 switch(car(e3))
|
|
|
2032 {case RGVAR: case RLVAR:
|
|
|
2033 gexpr(e4);
|
|
|
2034 indir(op,e3);
|
|
|
2035 return;
|
|
|
2036 case ADD:
|
|
|
2037 if (car(caddr(e3)) == CONST)
|
|
|
2038 switch (car(e5=cadr(e3)))
|
|
|
2039 {case RGVAR: case RLVAR:
|
|
|
2040 gexpr(e4);
|
|
|
2041 ldx(e5);
|
|
|
2042 indexx(op,cadr(caddr(e3)));
|
|
|
2043 return;
|
|
|
2044 }
|
|
|
2045 break;
|
|
|
2046 case PREINC:
|
|
|
2047 if ((l = caddr(e3)) == -1 || l == -2)
|
|
|
2048 switch (car(e5=cadr(e3)))
|
|
|
2049 {case GVAR: case LVAR:
|
|
|
2050 gexpr(e4);
|
|
|
2051 ldx(e5);
|
|
|
2052 predecx(op,l);
|
|
|
2053 stx(e5);
|
|
|
2054 return;
|
|
|
2055 }
|
|
|
2056 break;
|
|
|
2057 case POSTINC:
|
|
|
2058 if ((l = caddr(e3)) == 1 || l == 2)
|
|
|
2059 switch (car(e5=cadr(e3)))
|
|
|
2060 {case GVAR: case LVAR:
|
|
|
2061 gexpr(e4);
|
|
|
2062 ldx(e5);
|
|
|
2063 postincx(op,l);
|
|
|
2064 stx(e5);
|
|
|
2065 return;
|
|
|
2066 }
|
|
|
2067 break;
|
|
|
2068 }
|
|
|
2069 }
|
|
|
2070 switch (car(e4))
|
|
|
2071 {case RGVAR: case CRGVAR: case RLVAR: case CRLVAR: case CONST:
|
|
|
2072 gexpr(e2);
|
|
|
2073 gexpr(e4);
|
|
|
2074 break;
|
|
|
2075 default:
|
|
|
2076 gexpr(e4);
|
|
|
2077 pushd();
|
|
|
2078 gexpr(e2);
|
|
|
2079 pulld();
|
|
|
2080 }
|
|
|
2081 indexx(op,0);
|
|
|
2082 return;
|
|
|
2083 }
|
|
|
2084 assop(e1)
|
|
|
2085 int e1;
|
|
|
2086 {int e2,e3,byte,op;
|
|
|
2087 char *ldop,*stop;
|
|
|
2088 ldop = ((byte = (car(e1) == CASSOP)) ? "LDB" : "LDD");
|
|
|
2089 stop = (byte ? "STB" : "STD");
|
|
|
2090 e2 = cadr(e1);
|
|
|
2091 e3 = caddr(e1);
|
|
|
2092 op = cadddr(e1);
|
|
|
2093 switch (car(e2))
|
|
|
2094 {case GVAR: case LVAR:
|
|
|
2095 switch (car(e3))
|
|
|
2096 {case RGVAR: case RLVAR: case CONST:
|
|
|
2097 if (simpop(op))
|
|
|
2098 { index(ldop,e2);
|
|
|
2099 sextend(byte);
|
|
|
2100 oprt(op,e3);
|
|
|
2101 index(stop,e2);
|
|
|
2102 return;
|
|
|
2103 }
|
|
|
2104 default:
|
|
|
2105 gexpr(e3);
|
|
|
2106 pushd();
|
|
|
2107 index(ldop,e2);
|
|
|
2108 sextend(byte);
|
|
|
2109 tosop(op);
|
|
|
2110 index(stop,e2);
|
|
|
2111 return;
|
|
|
2112 }
|
|
|
2113 default:
|
|
|
2114 switch (car(e3))
|
|
|
2115 {case RGVAR: case RLVAR: case CONST:
|
|
|
2116 if (simpop(op))
|
|
|
2117 { gexpr(e2);
|
|
|
2118 indexx(ldop,0);
|
|
|
2119 sextend(byte);
|
|
|
2120 oprt(op,e3);
|
|
|
2121 indexx(stop,0);
|
|
|
2122 return;
|
|
|
2123 }
|
|
|
2124 default:
|
|
|
2125 gexpr(e3);
|
|
|
2126 pushd();
|
|
|
2127 gexpr(e2);
|
|
|
2128 indexx(ldop,0);
|
|
|
2129 sextend(byte);
|
|
|
2130 tosop(op);
|
|
|
2131 indexx(stop,0);
|
|
|
2132 return;
|
|
|
2133 }
|
|
|
2134 }
|
|
|
2135 }
|
|
|
2136 simpop(op)
|
|
|
2137 int op;
|
|
|
2138 { return (op == ADD || op == SUB ||
|
|
|
2139 op == BAND || op == EOR || op == BOR);
|
|
|
2140 }
|
|
|
2141 oprt(op,e1)
|
|
|
2142 int op,e1;
|
|
|
2143 {int e2;
|
|
|
2144 e2 = cadr(e1);
|
|
|
2145 switch (car(e1))
|
|
|
2146 {case RGVAR:
|
|
|
2147 oprt1(op,"Y",e2);
|
|
|
2148 return;
|
|
|
2149 case RLVAR:
|
|
|
2150 oprt1(op,"U",e2);
|
|
|
2151 return;
|
|
|
2152 case CONST:
|
|
|
2153 oprtc(op,e2);
|
|
|
2154 return;
|
|
|
2155 }
|
|
|
2156 }
|
|
|
2157 oprt1(op,index,n)
|
|
|
2158 int op,n;
|
|
|
2159 char *index;
|
|
|
2160 { switch (op)
|
|
|
2161 {case ADD:
|
|
|
2162 printf("\tADDD\t%d,%s\n",n,index);
|
|
|
2163 return;
|
|
|
2164 case SUB:
|
|
|
2165 printf("\tSUBD\t%d,%s\n",n,index);
|
|
|
2166 return;
|
|
|
2167 case BAND: case EOR: case BOR:
|
|
|
2168 dualop(op,index,n);
|
|
|
2169 return;
|
|
|
2170 }
|
|
|
2171 }
|
|
|
2172 dualop(op,index,n)
|
|
|
2173 int op;
|
|
|
2174 char *index;
|
|
|
2175 int n;
|
|
|
2176 {char *ops;
|
|
|
2177 ops = ((op == BAND) ? "AND" :
|
|
|
2178 (op == EOR) ? "EOR" :
|
|
|
2179 (op == BOR) ? "OR" : (char *)DEBUG);
|
|
|
2180 printf("\t%sA\t%d,%s\n\t%sB\t%d+1,%s\n",ops,n,index,ops,n,index);
|
|
|
2181 }
|
|
|
2182
|
|
|
2183 oprtc(op,n)
|
|
|
2184 int op,n;
|
|
|
2185 { switch (op)
|
|
|
2186 {case ADD:
|
|
|
2187 adddim(n);
|
|
|
2188 return;
|
|
|
2189 case SUB:
|
|
|
2190 subdim(n);
|
|
|
2191 return;
|
|
|
2192 case BAND: case EOR: case BOR:
|
|
|
2193 dualc(op,n);
|
|
|
2194 return;
|
|
|
2195 }
|
|
|
2196 }
|
|
|
2197 dualc(op,n)
|
|
|
2198 int op;
|
|
|
2199 int n;
|
|
|
2200 {char *ops;
|
|
|
2201 ops = ((op == BAND) ? "AND" :
|
|
|
2202 (op == EOR) ? "EOR" :
|
|
|
2203 (op == BOR) ? "OR" : (char *)DEBUG);
|
|
|
2204 printf("\t%sA\t#%d\n\t%sB\t#%d\n",ops,(n >> 8) & 0xff,ops,n & 0xff);
|
|
|
2205 }
|
|
|
2206 tosop(op)
|
|
|
2207 int op;
|
|
|
2208 { switch (op)
|
|
|
2209 {case ADD:
|
|
|
2210 addds();
|
|
|
2211 return;
|
|
|
2212 case SUB:
|
|
|
2213 subds();
|
|
|
2214 return;
|
|
|
2215 case BAND: case EOR: case BOR:
|
|
|
2216 dualtosop(op);
|
|
|
2217 return;
|
|
|
2218 default:
|
|
|
2219 pulx();
|
|
|
2220 library(op);
|
|
|
2221 }
|
|
|
2222 }
|
|
|
2223 dualtosop(op)
|
|
|
2224 int op;
|
|
|
2225 {char *ops;
|
|
|
2226 ops = ((op == BAND) ? "AND" :
|
|
|
2227 (op == EOR) ? "EOR" :
|
|
|
2228 (op == BOR) ? "OR" : (char *)DEBUG);
|
|
|
2229 printf("\t%sA\t,S+\n\t%sB\t,S+\n",ops,ops);
|
|
|
2230 }
|
|
|
2231 pushd()
|
|
|
2232 { printf("\tPSHS\tD\n");
|
|
|
2233 }
|
|
|
2234 pushx()
|
|
|
2235 { printf("\tPSHS\tX\n");
|
|
|
2236 }
|
|
|
2237 pulld()
|
|
|
2238 { printf("\tPULS\tD\n");
|
|
|
2239 }
|
|
|
2240 pulx()
|
|
|
2241 { printf("\tPULS\tX\n");
|
|
|
2242 }
|
|
|
2243 tfrdx()
|
|
|
2244 { printf("\tTFR\tD,X\n");
|
|
|
2245 }
|
|
|
2246 tfrxd()
|
|
|
2247 { printf("\tTFR\tX,D\n");
|
|
|
2248 }
|
|
|
2249 /*
|
|
|
2250 exgdx()
|
|
|
2251 { printf("\tEXG\tD,X\n");
|
|
|
2252 }
|
|
|
2253 */
|
|
|
2254 asld()
|
|
|
2255 { printf("\tASLB\n\tROLA\n");
|
|
|
2256 }
|
|
|
2257 adddim(n)
|
|
|
2258 { printf("\tADDD\t#%d\n",n);
|
|
|
2259 }
|
|
|
2260 subdim(n)
|
|
|
2261 { printf("\tSUBD\t#%d\n",n);
|
|
|
2262 }
|
|
|
2263 cmpdimm(n)
|
|
|
2264 int n;
|
|
|
2265 { printf("\tCMPD\t#%d\n",n);
|
|
|
2266 }
|
|
|
2267 addds()
|
|
|
2268 { printf("\tADDD\t,S++\n");
|
|
|
2269 }
|
|
|
2270 subds()
|
|
|
2271 { printf("\tSUBD\t,S++\n");
|
|
|
2272 }
|
|
|
2273 clrd()
|
|
|
2274 { printf("\tCLRA\n\tCLRB\n");
|
|
|
2275 }
|
|
|
2276 lddim(n)
|
|
|
2277 int n;
|
|
|
2278 { printf("\tLDD\t#%d\n",n);
|
|
|
2279 }
|
|
|
2280
|
|
|
2281 ldd(e)
|
|
|
2282 int e;
|
|
|
2283 { switch (car(e))
|
|
|
2284 {case GVAR:
|
|
|
2285 lddy(cadr(e));
|
|
|
2286 return;
|
|
|
2287 case LVAR:
|
|
|
2288 lddu(cadr(e));
|
|
|
2289 return;
|
|
|
2290 default:
|
|
|
2291 DEBUG;
|
|
|
2292 }
|
|
|
2293 }
|
|
|
2294
|
|
|
2295 lddx()
|
|
|
2296 { printf("\tLDD\t,X\n");
|
|
|
2297 }
|
|
|
2298 lddy(n)
|
|
|
2299 int n;
|
|
|
2300 { printf("\tLDD\t%d,Y\n",n);
|
|
|
2301 }
|
|
|
2302 lddu(n)
|
|
|
2303 int n;
|
|
|
2304 { printf("\tLDD\t%d,U\n",n);
|
|
|
2305 }
|
|
|
2306
|
|
|
2307 std(e)
|
|
|
2308 int e;
|
|
|
2309 { switch (car(e))
|
|
|
2310 {case GVAR:
|
|
|
2311 stdy(cadr(e));
|
|
|
2312 return;
|
|
|
2313 case LVAR:
|
|
|
2314 stdu(cadr(e));
|
|
|
2315 return;
|
|
|
2316 default:
|
|
|
2317 DEBUG;
|
|
|
2318 }
|
|
|
2319 }
|
|
|
2320 stdx()
|
|
|
2321 { printf("\tSTD\t,X\n");
|
|
|
2322 }
|
|
|
2323 stdy(n)
|
|
|
2324 int n;
|
|
|
2325 { printf("\tSTD\t%d,Y\n",n);
|
|
|
2326 }
|
|
|
2327 stdu(n)
|
|
|
2328 int n;
|
|
|
2329 { printf("\tSTD\t%d,U\n",n);
|
|
|
2330 }
|
|
|
2331
|
|
|
2332 ldbx()
|
|
|
2333 { printf("\tLDB\t,X\n");
|
|
|
2334 }
|
|
|
2335 /*
|
|
|
2336 stbx()
|
|
|
2337 { printf("\tSTB\t,X\n");
|
|
|
2338 }
|
|
|
2339 */
|
|
|
2340 ldby(n)
|
|
|
2341 int n;
|
|
|
2342 { printf("\tLDB\t%d,Y\n",n);
|
|
|
2343 }
|
|
|
2344 ldbu(n)
|
|
|
2345 int n;
|
|
|
2346 { printf("\tLDB\t%d,U\n",n);
|
|
|
2347 }
|
|
|
2348 predecx(op,l)
|
|
|
2349 char *op;
|
|
|
2350 int l;
|
|
|
2351 { printf("\t%s\t,%sX\n",op,(l == -1 ? "-" : "--"));
|
|
|
2352 }
|
|
|
2353 postincx(op,l)
|
|
|
2354 char *op;
|
|
|
2355 int l;
|
|
|
2356 { printf("\t%s\t,X%s\n",op,(l == 1 ? "+" : "++"));
|
|
|
2357 }
|
|
|
2358 leaxy(n)
|
|
|
2359 int n;
|
|
|
2360 { printf("\tLEAX\t%d,Y\n",n);
|
|
|
2361 }
|
|
|
2362 leaxu(n)
|
|
|
2363 int n;
|
|
|
2364 { printf("\tLEAX\t%d,U\n",n);
|
|
|
2365 }
|
|
|
2366 leaxpcr(n)
|
|
|
2367 NMTBL *n;
|
|
|
2368 { printf("\tLEAX\t%s,PCR\n",n->nm);
|
|
|
2369 }
|
|
|
2370
|
|
|
2371 ldx(e)
|
|
|
2372 int e;
|
|
|
2373 { switch (car(e))
|
|
|
2374 {case GVAR: case RGVAR:
|
|
|
2375 ldxy(cadr(e));
|
|
|
2376 return;
|
|
|
2377 case LVAR: case RLVAR:
|
|
|
2378 ldxu(cadr(e));
|
|
|
2379 return;
|
|
|
2380 default:
|
|
|
2381 DEBUG;
|
|
|
2382 }
|
|
|
2383 }
|
|
|
2384
|
|
|
2385 ldxy(n)
|
|
|
2386 int n;
|
|
|
2387 { printf("\tLDX\t%d,Y\n",n);
|
|
|
2388 }
|
|
|
2389 ldxu(n)
|
|
|
2390 int n;
|
|
|
2391 { printf("\tLDX\t%d,U\n",n);
|
|
|
2392 }
|
|
|
2393 /*
|
|
|
2394 ldxi(n)
|
|
|
2395 int n;
|
|
|
2396 { printf("\tLDX\t#%d\n",n);
|
|
|
2397 }
|
|
|
2398 */
|
|
|
2399 stx(e)
|
|
|
2400 int e;
|
|
|
2401 { switch (car(e))
|
|
|
2402 {case GVAR:
|
|
|
2403 stxy(cadr(e));
|
|
|
2404 return;
|
|
|
2405 case LVAR:
|
|
|
2406 stxu(cadr(e));
|
|
|
2407 return;
|
|
|
2408 default:
|
|
|
2409 DEBUG;
|
|
|
2410 }
|
|
|
2411 }
|
|
|
2412
|
|
|
2413 stxy(n)
|
|
|
2414 int n;
|
|
|
2415 { printf("\tSTX\t%d,Y\n",n);
|
|
|
2416 }
|
|
|
2417 stxu(n)
|
|
|
2418 int n;
|
|
|
2419 { printf("\tSTX\t%d,U\n",n);
|
|
|
2420 }
|
|
|
2421
|
|
|
2422 sex()
|
|
|
2423 { printf("\tSEX\n");
|
|
|
2424 }
|
|
|
2425 incx()
|
|
|
2426 { printf("\tINC\t,X\n");
|
|
|
2427 }
|
|
|
2428 decx()
|
|
|
2429 { printf("\tDEC\t,X\n");
|
|
|
2430 }
|
|
|
2431 opdx(op)
|
|
|
2432 char *op;
|
|
|
2433 { printf("\t%s\tD,X\n",op);
|
|
|
2434 }
|
|
|
2435 indexx(op,n)
|
|
|
2436 char *op;
|
|
|
2437 int n;
|
|
|
2438 { printf("\t%s\t%d,X\n",op,n);
|
|
|
2439 }
|
|
|
2440
|
|
|
2441 index(op,e)
|
|
|
2442 char *op;
|
|
|
2443 int e;
|
|
|
2444 { switch (car(e))
|
|
|
2445 {case GVAR:
|
|
|
2446 indexy(op,cadr(e));
|
|
|
2447 return;
|
|
|
2448 case LVAR:
|
|
|
2449 indexu(op,cadr(e));
|
|
|
2450 return;
|
|
|
2451 default:
|
|
|
2452 DEBUG;
|
|
|
2453 }
|
|
|
2454 }
|
|
|
2455
|
|
|
2456 indexy(op,n)
|
|
|
2457 char *op;
|
|
|
2458 int n;
|
|
|
2459 { printf("\t%s\t%d,Y\n",op,n);
|
|
|
2460 }
|
|
|
2461 indexu(op,n)
|
|
|
2462 char *op;
|
|
|
2463 int n;
|
|
|
2464 { printf("\t%s\t%d,U\n",op,n);
|
|
|
2465 }
|
|
|
2466
|
|
|
2467
|
|
|
2468 indir(op,e)
|
|
|
2469 char *op;
|
|
|
2470 int e;
|
|
|
2471 { switch (car(e))
|
|
|
2472 {case RGVAR:
|
|
|
2473 indiry(op,cadr(e));
|
|
|
2474 return;
|
|
|
2475 case RLVAR:
|
|
|
2476 indiru(op,cadr(e));
|
|
|
2477 return;
|
|
|
2478 default:
|
|
|
2479 DEBUG;
|
|
|
2480 }
|
|
|
2481 }
|
|
|
2482
|
|
|
2483 indiry(op,n)
|
|
|
2484 char *op;
|
|
|
2485 int n;
|
|
|
2486 { printf("\t%s\t[%d,Y]\n",op,n);
|
|
|
2487 }
|
|
|
2488 indiru(op,n)
|
|
|
2489 char *op;
|
|
|
2490 int n;
|
|
|
2491 { printf("\t%s\t[%d,U]\n",op,n);
|
|
|
2492 }
|
|
|
2493 sextend(byte)
|
|
|
2494 int byte;
|
|
|
2495 { if (byte) sex();
|
|
|
2496 }
|
|
|
2497 binexpr(e1)
|
|
|
2498 int e1;
|
|
|
2499 { gexpr(caddr(e1));
|
|
|
2500 pushd();
|
|
|
2501 gexpr(cadr(e1));
|
|
|
2502 pulx();
|
|
|
2503 library(car(e1));
|
|
|
2504 }
|
|
|
2505 library(op)
|
|
|
2506 int op;
|
|
|
2507 { printf("\tLBSR\t_0000%d\n",
|
|
|
2508 ((op == MUL || op == UMUL) ? 1 :
|
|
|
2509 (op == DIV) ? 2 :
|
|
|
2510 (op == UDIV) ? 3 :
|
|
|
2511 (op == MOD) ? 4 :
|
|
|
2512 (op == UMOD) ? 5 :
|
|
|
2513 (op == LSHIFT) ? 6 :
|
|
|
2514 (op == ULSHIFT) ? 7 :
|
|
|
2515 (op == RSHIFT) ? 8 :
|
|
|
2516 (op == URSHIFT) ? 9 : DEBUG));
|
|
|
2517 }
|
|
|
2518 cexpr(e)
|
|
|
2519 int e;
|
|
|
2520 { if (car(e) != CONST) error(CNERR);
|
|
|
2521 return (cadr(e));
|
|
|
2522 }
|
|
|
2523
|
|
|
2524 getsym()
|
|
|
2525 {NMTBL *nptr0,*nptr1;
|
|
|
2526 int i;
|
|
|
2527 char c;
|
|
|
2528 if (alpha(skipspc()))
|
|
|
2529 { i = hash = 0;
|
|
|
2530 while (alpha(ch) || digit(ch))
|
|
|
2531 { if (i <= 7) hash=7*(hash+(name[i++]=ch));
|
|
|
2532 getch();
|
|
|
2533 }
|
|
|
2534 name[i] = '\0';
|
|
|
2535 nptr0 = gsearch();
|
|
|
2536 if (nptr0->sc == RESERVE) return sym = nptr0->dsp;
|
|
|
2537 if (nptr0->sc == MACRO && !mflag)
|
|
|
2538 { mflag++;
|
|
|
2539 chsave = ch;
|
|
|
2540 chptrsave = chptr;
|
|
|
2541 chptr = (char *)nptr0->dsp;
|
|
|
2542 getch();
|
|
|
2543 return getsym();
|
|
|
2544 }
|
|
|
2545 sym = IDENT;
|
|
|
2546 gnptr=nptr=nptr0;
|
|
|
2547 if (mode==GDECL || mode==GSDECL || mode==GUDECL ||
|
|
|
2548 mode==GTDECL || mode==TOP)
|
|
|
2549 return sym;
|
|
|
2550 nptr1=lsearch();
|
|
|
2551 if (mode==STAT)
|
|
|
2552 if (nptr1->sc == EMPTY) return sym;
|
|
|
2553 else { nptr=nptr1; return sym;}
|
|
|
2554 nptr=nptr1;
|
|
|
2555 return sym;
|
|
|
2556 }
|
|
|
2557 else if (digit(ch))
|
|
|
2558 { symval=0;
|
|
|
2559 if (ch == '0')
|
|
|
2560 { if (getch() == 'x' || ch == 'X')
|
|
|
2561 while(1)
|
|
|
2562 if(digit(getch()))
|
|
|
2563 symval=symval*16+ch-'0';
|
|
|
2564 else if('a'<=ch&&ch<='f')
|
|
|
2565 symval=symval*16+ch-'a'+10;
|
|
|
2566 else if('A'<=ch&&ch<='F')
|
|
|
2567 symval=symval*16+ch-'A'+10;
|
|
|
2568 else break;
|
|
|
2569 else while (digit(ch)) {symval=symval*8+ch-'0';getch();}
|
|
|
2570 }
|
|
|
2571 else while(digit(ch)) {symval=symval*10+ch-'0';getch();}
|
|
|
2572 return sym=CONST;
|
|
|
2573 }
|
|
|
2574 else if(ch=='\'')
|
|
|
2575 { getch();
|
|
|
2576 symval=escape();
|
|
|
2577 if(ch!='\'') error(CHERR);
|
|
|
2578 getch();
|
|
|
2579 return sym=CONST;
|
|
|
2580 }
|
|
|
2581 else if(ch=='"')
|
|
|
2582 { getstring();
|
|
|
2583 return sym= STRING;
|
|
|
2584 }
|
|
|
2585 c=ch;
|
|
|
2586 getch();
|
|
|
2587 switch(c)
|
|
|
2588 {case '*':
|
|
|
2589 return postequ(MUL,MUL+AS);
|
|
|
2590 case '&':
|
|
|
2591 if(ch=='&') {getch();return sym=LAND;}
|
|
|
2592 return postequ(BAND,BAND+AS);
|
|
|
2593 case '-':
|
|
|
2594 if(ch=='>') {getch();return sym=ARROW;}
|
|
|
2595 if(ch=='-') {getch();return sym=DEC;}
|
|
|
2596 return postequ(SUB,SUB+AS);
|
|
|
2597 case '!':
|
|
|
2598 return postequ(LNOT,NEQ);
|
|
|
2599 case '~':
|
|
|
2600 return sym=BNOT;
|
|
|
2601 case '+':
|
|
|
2602 if(ch=='+') {getch();return sym=INC;}
|
|
|
2603 return postequ(ADD,ADD+AS);
|
|
|
2604 case '%':
|
|
|
2605 return postequ(MOD,MOD+AS);
|
|
|
2606 case '^':
|
|
|
2607 return postequ(EOR,EOR+AS);
|
|
|
2608 case '|':
|
|
|
2609 if(ch=='|') {getch();return sym=LOR;}
|
|
|
2610 return postequ(BOR,BOR+AS);
|
|
|
2611 case '=':
|
|
|
2612 return postequ(ASS,EQ);
|
|
|
2613 case '>':
|
|
|
2614 if(ch=='>') {getch();return postequ(RSHIFT,RSHIFT+AS);}
|
|
|
2615 return postequ(GT,GE);
|
|
|
2616 case '<':
|
|
|
2617 if(ch=='<') {getch();return postequ(LSHIFT,LSHIFT+AS);}
|
|
|
2618 return postequ(LT,LE);
|
|
|
2619 case '(':
|
|
|
2620 return sym=LPAR;
|
|
|
2621 case ')':
|
|
|
2622 return sym=RPAR;
|
|
|
2623 case '[':
|
|
|
2624 return sym=LBRA;
|
|
|
2625 case ']':
|
|
|
2626 return sym=RBRA;
|
|
|
2627 case '{':
|
|
|
2628 return sym=LC;
|
|
|
2629 case '}':
|
|
|
2630 return sym=RC;
|
|
|
2631 case ',':
|
|
|
2632 return sym=COMMA;
|
|
|
2633 case ';':
|
|
|
2634 return sym=SM;
|
|
|
2635 case ':':
|
|
|
2636 return sym=COLON;
|
|
|
2637 case '?':
|
|
|
2638 return sym=COND;
|
|
|
2639 case '.':
|
|
|
2640 return sym=PERIOD;
|
|
|
2641 case '/':
|
|
|
2642 if(ch!='*') return postequ(DIV,DIV+AS);
|
|
|
2643 getch();
|
|
|
2644 while(ch=='*'?getch()!='/':getch());
|
|
|
2645 getch();
|
|
|
2646 return getsym();
|
|
|
2647 default:
|
|
|
2648 error(CHERR);
|
|
|
2649 return getsym();
|
|
|
2650 }
|
|
|
2651 }
|
|
|
2652 postequ(s1,s2)
|
|
|
2653 int s1,s2;
|
|
|
2654 { if(ch=='=') {getch();return sym=s2;}
|
|
|
2655 return sym=s1;
|
|
|
2656 }
|
|
|
2657 alpha(c)
|
|
|
2658 char c;
|
|
|
2659 { return('a'<=c&&c<='z'||'A'<=c&&c<='Z'||c=='_');
|
|
|
2660 }
|
|
|
2661 digit(c)
|
|
|
2662 char c;
|
|
|
2663 { return('0'<=c&&c<='9');
|
|
|
2664 }
|
|
|
2665 NMTBL *gsearch()
|
|
|
2666 {NMTBL *nptr,*iptr;
|
|
|
2667 iptr=nptr= &ntable[hash % GSYMS];
|
|
|
2668 while(nptr->sc!=EMPTY && neqname(nptr->nm))
|
|
|
2669 { if (++nptr== &ntable[GSYMS]) nptr=ntable;
|
|
|
2670 if (nptr==iptr) error(GSERR);
|
|
|
2671 }
|
|
|
2672 if (nptr->sc == EMPTY) copy(nptr->nm);
|
|
|
2673 return nptr;
|
|
|
2674 }
|
|
|
2675 NMTBL *lsearch()
|
|
|
2676 {NMTBL *nptr,*iptr;
|
|
|
2677 iptr=nptr= &ntable[hash%LSYMS+GSYMS];
|
|
|
2678 while(nptr->sc!=EMPTY && neqname(nptr->nm))
|
|
|
2679 { if (++nptr== &ntable[LSYMS+GSYMS]) nptr= &ntable[GSYMS];
|
|
|
2680 if (nptr==iptr) error(LSERR);
|
|
|
2681 }
|
|
|
2682 if (nptr->sc == EMPTY) copy(nptr->nm);
|
|
|
2683 return nptr;
|
|
|
2684 }
|
|
|
2685 neqname(p)
|
|
|
2686 char *p;
|
|
|
2687 {char *q;
|
|
|
2688 q=name;
|
|
|
2689 while(*p) if(*p++ != *q++) return 1;
|
|
|
2690 return *q!=0;
|
|
|
2691 }
|
|
|
2692 copy(p)
|
|
|
2693 char *p;
|
|
|
2694 {char *q;
|
|
|
2695 q=name;
|
|
|
2696 while(*p++= *q++);
|
|
|
2697 }
|
|
|
2698 getstring()
|
|
|
2699 { getch();
|
|
|
2700 symval = 0;
|
|
|
2701 sptr = cheapp;
|
|
|
2702 while (ch != '"')
|
|
|
2703 { *cheapp++ = escape();
|
|
|
2704 symval++;
|
|
|
2705 if (cheapp >= cheap+CHEAPSIZE) error(STRERR);
|
|
|
2706 }
|
|
|
2707 getch();
|
|
|
2708 *cheapp++ = '\0';
|
|
|
2709 symval++;
|
|
|
2710 }
|
|
|
2711 skipspc()
|
|
|
2712 { while(ch=='\t'||ch=='\n'||ch==' '||ch=='\r') getch();
|
|
|
2713 return ch;
|
|
|
2714 }
|
|
|
2715 getch()
|
|
|
2716 { if(*chptr) return ch= *chptr++;
|
|
|
2717 if(mflag) {mflag=0;chptr=chptrsave;return ch=chsave;}
|
|
|
2718 getline();
|
|
|
2719 return getch();
|
|
|
2720 }
|
|
|
2721 char escape()
|
|
|
2722 {char c;
|
|
|
2723 if ((c=ch) == '\\')
|
|
|
2724 { if (digit(c=getch()))
|
|
|
2725 { c = ch-'0';
|
|
|
2726 if (digit(getch()))
|
|
|
2727 { c = c*8+ch-'0';
|
|
|
2728 if (digit(getch())) {c=c*8+ch-'0';getch();}
|
|
|
2729 }
|
|
|
2730 return c;
|
|
|
2731 }
|
|
|
2732 getch();
|
|
|
2733 switch(c)
|
|
|
2734 {case 'n':
|
|
|
2735 return '\n';
|
|
|
2736 case 't':
|
|
|
2737 return '\t';
|
|
|
2738 case 'b':
|
|
|
2739 return '\b';
|
|
|
2740 case 'r':
|
|
|
2741 return '\r';
|
|
|
2742 case 'f':
|
|
|
2743 return '\f';
|
|
|
2744 case '\n':
|
|
|
2745 return escape();
|
|
|
2746 default:
|
|
|
2747 return c;
|
|
|
2748 }
|
|
|
2749 }
|
|
|
2750 if (c == '\n') error(EXERR);
|
|
|
2751 getch();
|
|
|
2752 return c;
|
|
|
2753 }
|
|
|
2754 FILE *getfname()
|
|
|
2755 {int i;
|
|
|
2756 char name[LBUFSIZE];
|
|
|
2757 getch();
|
|
|
2758 if(skipspc()!='"') error(INCERR);
|
|
|
2759 for(i=0;(getch()!='"' && ch!='\n');)
|
|
|
2760 if(i<LBUFSIZE-1) name[i++]=ch;
|
|
|
2761 if(ch=='\n') error(INCERR);
|
|
|
2762 name[i]=0;
|
|
|
2763 return ( (filep+1)->fcb = fopen(name,"r") );
|
|
|
2764 }
|
|
|
2765 getline()
|
|
|
2766 {int i;
|
|
|
2767 int c;
|
|
|
2768 lineno++;
|
|
|
2769 glineno++;
|
|
|
2770 chptr=linebuf;
|
|
|
2771 i=0;
|
|
|
2772 while ((*chptr++ = c = getc(filep->fcb)) != '\n')
|
|
|
2773 { if (++i > LBUFSIZE-2) error(LNERR);
|
|
|
2774 if (c==EOF)
|
|
|
2775 { error(EOFERR);
|
|
|
2776 --chptr;
|
|
|
2777 }
|
|
|
2778 }
|
|
|
2779 *chptr = '\0';
|
|
|
2780 if (lsrc && !asmf) printf("* %s",linebuf);
|
|
|
2781 if (*(chptr = linebuf) == '#')
|
|
|
2782 { ++chptr;
|
|
|
2783 if (macroeq("define"))
|
|
|
2784 { i=mode;
|
|
|
2785 mode=GDECL;
|
|
|
2786 ch= *chptr;
|
|
|
2787 if (getsym() == IDENT)
|
|
|
2788 { if (nptr->sc == EMPTY)
|
|
|
2789 { nptr->sc = MACRO;
|
|
|
2790 nptr->dsp = (int)cheapp;
|
|
|
2791 while ((*cheapp++ = c = *chptr++)
|
|
|
2792 && c != '\n');
|
|
|
2793 *cheapp++ = '\0';
|
|
|
2794 if (cheapp >= cheap+CHEAPSIZE)
|
|
|
2795 error(STRERR);
|
|
|
2796 if (!c) error(EOFERR);
|
|
|
2797 }
|
|
|
2798 else error(MCERR);
|
|
|
2799 }
|
|
|
2800 else error(MCERR);
|
|
|
2801 mode=i;
|
|
|
2802 *(chptr = linebuf) = '\0';
|
|
|
2803 }
|
|
|
2804 else if (macroeq("include"))
|
|
|
2805 { fprintf(stderr,"%s",linebuf);
|
|
|
2806 if(filep+1 >= filestack + FILES) error(FILERR);
|
|
|
2807 if ( ((filep+1)->fcb=getfname()) == NULL) error(FILERR);
|
|
|
2808 (filep+1)->ln=lineno;
|
|
|
2809 lineno=0;
|
|
|
2810 ++filep;
|
|
|
2811 *(chptr = linebuf) = '\0';
|
|
|
2812 }
|
|
|
2813 else if (macroeq("asm"))
|
|
|
2814 { if (asmf) error(MCERR);
|
|
|
2815 asmf = 1;
|
|
|
2816 getline();
|
|
|
2817 while (asmf)
|
|
|
2818 { printf("%s",linebuf);
|
|
|
2819 getline();
|
|
|
2820 }
|
|
|
2821 }
|
|
|
2822 else if (macroeq("endasm"))
|
|
|
2823 { if (!asmf) error(MCERR);
|
|
|
2824 asmf = 0;
|
|
|
2825 }
|
|
|
2826 else if (macroeq(" "))
|
|
|
2827 getline();
|
|
|
2828 else error(MCERR);
|
|
|
2829 }
|
|
|
2830 }
|
|
|
2831
|
|
|
2832 macroeq(s)
|
|
|
2833 char *s;
|
|
|
2834 {char *p;
|
|
|
2835 for (p = chptr; *s;) if (*s++ != *p++) return 0;
|
|
|
2836 chptr = p;
|
|
|
2837 return 1;
|
|
|
2838 }
|
|
|
2839
|
|
|
2840 car(e)
|
|
|
2841 int e;
|
|
|
2842 { return heap[e];
|
|
|
2843 }
|
|
|
2844 cadr(e)
|
|
|
2845 int e;
|
|
|
2846 { return heap[e+1];
|
|
|
2847 }
|
|
|
2848 caddr(e)
|
|
|
2849 int e;
|
|
|
2850 { return heap[e+2];
|
|
|
2851 }
|
|
|
2852 cadddr(e)
|
|
|
2853 int e;
|
|
|
2854 { return heap[e+3];
|
|
|
2855 }
|
|
|
2856 list2(e1,e2)
|
|
|
2857 int e1,e2;
|
|
|
2858 {int e;
|
|
|
2859 e=getfree(2);
|
|
|
2860 heap[e]=e1;
|
|
|
2861 heap[e+1]=e2;
|
|
|
2862 return e;
|
|
|
2863 }
|
|
|
2864 list3(e1,e2,e3)
|
|
|
2865 int e1,e2,e3;
|
|
|
2866 {int e;
|
|
|
2867 e=getfree(3);
|
|
|
2868 heap[e]=e1;
|
|
|
2869 heap[e+1]=e2;
|
|
|
2870 heap[e+2]=e3;
|
|
|
2871 return e;
|
|
|
2872 }
|
|
|
2873 list4(e1,e2,e3,e4)
|
|
|
2874 int e1,e2,e3,e4;
|
|
|
2875 {int e;
|
|
|
2876 e=getfree(4);
|
|
|
2877 heap[e]=e1;
|
|
|
2878 heap[e+1]=e2;
|
|
|
2879 heap[e+2]=e3;
|
|
|
2880 heap[e+3]=e4;
|
|
|
2881 return e;
|
|
|
2882 }
|
|
|
2883 getfree(n)
|
|
|
2884 int n;
|
|
|
2885 {int e;
|
|
|
2886 switch (mode)
|
|
|
2887 {case GDECL: case GSDECL: case GUDECL: case GTDECL:
|
|
|
2888 e=gfree;
|
|
|
2889 gfree+=n;
|
|
|
2890 break;
|
|
|
2891 default:
|
|
|
2892 lfree-=n;
|
|
|
2893 e=lfree;
|
|
|
2894 }
|
|
|
2895 if(lfree<gfree) error(HPERR);
|
|
|
2896 return e;
|
|
|
2897 }
|
|
|
2898 rplacad(e,n)
|
|
|
2899 int e,n;
|
|
|
2900 { heap[e+1]=n;
|
|
|
2901 return e;
|
|
|
2902 }
|
