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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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101
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186 char *modname = "aout";
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99
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187 if(argc==1) exit(1);
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188 lsrc = chk = asmf = 0;
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189 ccout = "c.out";
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190 ac=argc;
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191 av=argv;
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192 for (ac2=1; (ac2 < ac) && (*av[ac2] == '-'); ++ac2)
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193 switch (*(av[ac2]+1))
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194 {case 'S': case 's':
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195 lsrc = 1;
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196 break;
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197 case 'O': case 'o':
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198 ccout = av[ac2]+2;
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199 break;
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101
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200 case 'M': case 'm':
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201 modname = av[ac2]+2;
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202 break;
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99
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203 case 'C': case 'c':
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204 chk = 1;
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205 break;
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206 default:
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207 error(OPTION);
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208 exit(1);
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209 }
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210 fclose(stdout);
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101
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211 if (!chk) {
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99
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212 if ( (obuf = fopen(ccout,"w")) == NULL ) error(FILERR);
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101
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213 else {
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214 printf("\tmod _eom,_name,_tylg,_atrv,_main,_GLOBALS\n"); /* os9 module header */
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215 printf("_name fcs /%s/\n",modname);
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216 }
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217 }
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99
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218 init();
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219 while(1)
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220 { for (nptr = &ntable[GSYMS],i=LSYMS; i--;)
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221 (nptr++)->sc = EMPTY;
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222 mode=TOP;
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223 while(getsym()==SM);
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224 mode=GDECL;
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225 args=0;
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226 decl();
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227 }
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228 }
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229 error(n)
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230 int n;
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231 { if(n == EOFERR)
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232 if(filep!=filestack)
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233 { lineno=filep->ln;
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234 fclose(filep->fcb);
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235 fprintf(stderr,"End of inclusion.\n");
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236 --filep;
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237 return;
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238 }
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239 else if(ac2!=ac)
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240 { fclose(filep->fcb);
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241 newfile();
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242 return;
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243 }
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244 else if(mode == TOP)
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245 { fprintf(stderr,"\nCompiled %u lines.\n",glineno-1);
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246 if (!chk) fprintf(stderr,
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247 "Total internal labels : %u.\n",labelno-1);
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248 fprintf(stderr,
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249 "Total global variables : %u bytes.\n\n",gpc);
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250 printf("_%d\tRTS\n_INITIALIZE\tEQU\t_1\n",ilabel);
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100
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251 printf("_GLOBALS\tEQU\t%u\n",gpc);
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99
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252 exit(0);
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253 }
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254 fprintf(stderr,"%5d:%s.\n",lineno,
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255 (n==FILERR) ? "Can't open specified file" :
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256 (n==DCERR) ? "Declaration syntax" :
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257 (n==STERR) ? "Statement syntax" :
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258 (n==EXERR) ? "Expression syntax" :
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259 (n==CNERR) ? "Constant required" :
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260 (n==CHERR) ? "Illegal character" :
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261 (n==GSERR) ? "Too many global symbols" :
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262 (n==LSERR) ? "Too many local symbols" :
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263 (n==STRERR) ? "Too many strings or macros" :
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264 (n==LNERR) ? "Line too long" :
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265 (n==EOFERR) ? "Unexpected end of file" :
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266 (n==MCERR) ? "Macro syntax" :
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267 (n==INCERR) ? "Include syntax" :
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268 (n==HPERR) ? "Too long expression" :
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269 (n==TYERR) ? "Type mismatch" :
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270 (n==LVERR) ? "Lvalue required" :
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271 (n==UDERR) ? "Undeclared identifier" :
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272 (n==OPTION) ? "Illegal option" :
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273 "Bug of compiler");
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274 errmsg();
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275 exit(1);
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276 }
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277 errmsg()
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278 {char *p,*lim;
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279 if(lineno==0) return;
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280 fprintf(stderr,"%s",linebuf);
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281 lim=(mflag?chptrsave:chptr);
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282 for (p=linebuf; p < lim;)
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283 fprintf(stderr,(*p++ == '\t') ? "\t" : " ");
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284 fprintf (stderr,"^\n");
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285 }
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286 checksym(s)
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287 int s;
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288 {char *p;
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289 if (sym != s)
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290 { p=(s==RPAR) ? "')'": (s==RBRA) ? "']'": (s==SM) ? "';'":
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291 (s==LPAR) ? "'('": (s==WHILE) ? "'while'":
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292 (s==COLON) ? "':'": "Identifier";
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293 fprintf(stderr,"%d:%s expected.\n",lineno,p);
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294 errmsg();
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295 }
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296 else getsym();
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297 }
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298 init()
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299 {NMTBL *nptr;
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300 int i;
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301 for(nptr = ntable,i = GSYMS; i--;) (nptr++)->sc = EMPTY;
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302 reserve("int",INT);
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303 reserve("void",INT);
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304 reserve("char",CHAR);
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305 reserve("struct",STRUCT);
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306 reserve("union",UNION);
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307 reserve("unsigned",UNSIGNED);
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308 reserve("static",STATIC);
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309 reserve("goto",GOTO);
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310 reserve("return",RETURN);
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311 reserve("break",BREAK);
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312 reserve("continue",CONTINUE);
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313 reserve("if",IF);
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314 reserve("else",ELSE);
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315 reserve("for",FOR);
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316 reserve("do",DO);
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317 reserve("while",WHILE);
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318 reserve("switch",SWITCH);
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319 reserve("case",CASE);
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320 reserve("default",DEFAULT);
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321 reserve("typedef",TYPEDEF);
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322 reserve("sizeof",SIZEOF);
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323 reserve("long",LONG);
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324 reserve("short",SHORT);
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325 gpc=glineno=mflag=0;
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326 gfree=ilabel=1;
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327 labelno=2;
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328 cheapp=cheap;
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329 lfree=HEAPSIZE;
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330 filep=filestack;
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331 newfile();
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332 getline();
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333 getch();
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334 }
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335 newfile()
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336 { lineno=0;
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337 fprintf(stderr,"%s:\n",av[ac2]);
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338 if ( (filep->fcb = fopen(av[ac2++],"r")) == NULL ) error(FILERR);
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339 }
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340 reserve(s,d)
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341 char *s;
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342 int d;
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343 {NMTBL *nptr;
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344 char *t;
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345 hash=0;
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346 t=name;
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347 while(*t++ = *s) hash=7*(hash+*s++);
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348 (nptr = gsearch())->sc = RESERVE;
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349 nptr->dsp = d;
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350 }
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351
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352 decl()
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353 {NMTBL *n;
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354 int t;
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355 if(sym==STATIC)
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356 if(mode==LDECL)
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357 { getsym();
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358 mode=STADECL;
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359 }
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360 else error(DCERR);
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361 else if(sym==TYPEDEF)
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362 if(mode==GDECL)
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363 { getsym();
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364 mode=GTDECL;
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365 }
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366 else if(mode==LDECL)
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367 { getsym();
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368 mode=LTDECL;
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369 }
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370 else error(DCERR);
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371 if((t=typespec())==0) return;
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372 if(sym==SM) return;
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373 type=t;
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374 n=decl0();
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375 reverse(t);
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376 if(args||sym==LC) {fdecl(n);return;}
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377 def(n);
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378 while(sym==COMMA)
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379 { getsym();
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380 type=t;
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381 n=decl0();
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382 reverse(t);
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383 if(args) error(DCERR);
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384 def(n);
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385 }
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386 if(sym!=SM) error(DCERR);
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387 if(mode==GTDECL) mode=GDECL;
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388 if(mode==STADECL||mode==LTDECL) mode=LDECL;
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389 }
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390 typespec()
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391 {int t;
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392 switch(sym)
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393 {case INT:
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394 case CHAR:
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395 t= sym;
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396 getsym();
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397 break;
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398 case STRUCT:
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399 case UNION:
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400 t=sdecl(sym);
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401 break;
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402 case UNSIGNED:
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403 t = UNSIGNED;
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404 if(getsym()==INT) getsym();
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405 break;
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406 case SHORT:
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407 t=CHAR;
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408 if(getsym()==INT) getsym();
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409 break;
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410 case LONG:
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411 t=INT;
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412 if(getsym()==INT) getsym();
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413 break;
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414 default:
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415 if(sym==IDENT)
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416 if(nptr->sc==TYPE)
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417 { t=nptr->ty;
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418 getsym();
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419 break;
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420 }
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421 else if(nptr->sc==EMPTY && gnptr->sc==TYPE)
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422 { t=gnptr->ty;
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423 getsym();
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424 break;
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425 }
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426 if(mode==LDECL) return 0;
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427 t= INT;
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428 }
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429 return t;
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430 }
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431 struct nametable *decl0()
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432 {NMTBL *n;
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433 if(sym==MUL)
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434 { getsym();
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435 n=decl0();
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436 type=list2(POINTER,type);
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437 return n;
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438 }
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439 return decl1();
|
|
|
440 }
|
|
|
441 NMTBL *decl1()
|
|
|
442 {NMTBL *n;
|
|
|
443 int i,t;
|
|
|
444 if(sym==LPAR)
|
|
|
445 { getsym();
|
|
|
446 n=decl0();
|
|
|
447 checksym(RPAR);
|
|
|
448 }
|
|
|
449 else if (sym == IDENT)
|
|
|
450 { n=nptr;
|
|
|
451 getsym();
|
|
|
452 }
|
|
|
453 else error(DCERR);
|
|
|
454 while(1)
|
|
|
455 if(sym==LBRA)
|
|
|
456 if(getsym()==RBRA)
|
|
|
457 { getsym();
|
|
|
458 if(mode!=ADECL) error(DCERR);
|
|
|
459 t=type;
|
|
|
460 type=list2(POINTER,type);
|
|
|
461 }
|
|
|
462 else
|
|
|
463 { t=type;
|
|
|
464 i=cexpr(expr());
|
|
|
465 checksym(RBRA);
|
|
|
466 type=list3(ARRAY,t,i);
|
|
|
467 }
|
|
|
468 else if(sym==LPAR)
|
|
|
469 { if(mode==GDECL) {mode=ADECL;getsym();mode=GDECL;}
|
|
|
470 else getsym();
|
|
|
471 if(sym==RPAR) getsym();
|
|
|
472 else
|
|
|
473 { n->sc=FUNCTION;
|
|
|
474 adecl();
|
|
|
475 n->sc=EMPTY;
|
|
|
476 }
|
|
|
477 type=list2(FUNCTION,type);
|
|
|
478 }
|
|
|
479 else return n;
|
|
|
480 }
|
|
|
481 adecl()
|
|
|
482 { if(mode!=GDECL) error(DCERR);
|
|
|
483 mode=ADECL;
|
|
|
484 args= 2;
|
|
|
485 while(1)
|
|
|
486 { if(sym!=IDENT) error(DCERR);
|
|
|
487 nptr->ty = INT;
|
|
|
488 nptr->sc = LVAR;
|
|
|
489 nptr->dsp = (args += 2);
|
|
|
490 if(getsym()!=COMMA) break;
|
|
|
491 getsym();
|
|
|
492 }
|
|
|
493 checksym(RPAR);
|
|
|
494 mode=GDECL;
|
|
|
495 return;
|
|
|
496 }
|
|
|
497 reverse(t1)
|
|
|
498 int t1;
|
|
|
499 {int t2,t3;
|
|
|
500 t2=t1;
|
|
|
501 while(type!=t1)
|
|
|
502 { t3=cadr(type);
|
|
|
503 rplacad(type,t2);
|
|
|
504 t2=type;
|
|
|
505 type=t3;
|
|
|
506 }
|
|
|
507 type=t2;
|
|
|
508 }
|
|
|
509 size(t)
|
|
|
510 int t;
|
|
|
511 { if(t==CHAR) return 1;
|
|
|
512 if(scalar(t)) return 2;
|
|
|
513 if(car(t)==STRUCT||car(t)==UNION)
|
|
|
514 { if(cadr(t)==-1) error(DCERR);
|
|
|
515 return(cadr(t));
|
|
|
516 }
|
|
|
517 if(car(t)==ARRAY) return(size(cadr(t))*caddr(t));
|
|
|
518 else error(DCERR);
|
|
|
519 /*NOTREACHED*/
|
|
|
520 }
|
|
|
521 def(n)
|
|
|
522 NMTBL *n;
|
|
|
523 {int sz,nsc,ndsp,slfree,l,t,e;
|
|
|
524 if(car(type)==FUNCTION)
|
|
|
525 { fcheck(n);
|
|
|
526 return;
|
|
|
527 }
|
|
|
528 if (n->sc!=EMPTY &&
|
|
|
529 (mode!=ADECL || n->sc!=LVAR || n->ty!=INT) &&
|
|
|
530 (mode!=GSDECL&&mode!=LSDECL || n->sc!=FIELD || n->dsp!=disp) &&
|
|
|
531 (mode!=GUDECL&&mode!=LUDECL || n->sc!=FIELD || n->dsp!=0) )
|
|
|
532 error(DCERR);
|
|
|
533 sz = size(n->ty = type);
|
|
|
534 switch(mode)
|
|
|
535 {case GDECL:
|
|
|
536 printf("%s\tEQU\t%u\n",n->nm,gpc);
|
|
|
537 case STADECL:
|
|
|
538 nsc = GVAR;
|
|
|
539 ndsp = gpc;
|
|
|
540 if(sym==ASS)
|
|
|
541 { t=type;
|
|
|
542 if(!scalar(t))
|
|
|
543 error(TYERR);
|
|
|
544 if(mode==STADECL) printf("\tBRA\t_%d\n",l=fwdlabel());
|
|
|
545 fwddef(ilabel);
|
|
|
546 getsym();
|
|
|
547 slfree=lfree;
|
|
|
548 e=expr1();
|
|
|
549 if(car(e)==CONST)
|
|
|
550 { lddim(cadr(e));
|
|
|
551 indexy(t==CHAR?"STB":"STD",gpc);
|
|
|
552 }
|
|
|
553 else if(t!=CHAR)
|
|
|
554 { if(car(e)==ADDRESS&&car(cadr(e))==GVAR)
|
|
|
555 leaxy(cadr(cadr(e)));
|
|
|
556 else if(car(e)==FNAME)
|
|
|
557 leaxpcr((NMTBL *)cadr(e));
|
|
|
558 else error(TYERR);
|
|
|
559 stxy(gpc);
|
|
|
560 }
|
|
|
561 else error(TYERR);
|
|
|
562 lfree=slfree;
|
|
|
563 jmp(ilabel=fwdlabel());
|
|
|
564 if(mode==STADECL) fwddef(l);
|
|
|
565 type=t;
|
|
|
566 }
|
|
|
567 gpc +=sz;
|
|
|
568 break;
|
|
|
569 case GSDECL:
|
|
|
570 nsc = FIELD;
|
|
|
571 ndsp = disp;
|
|
|
572 disp += sz;
|
|
|
573 break;
|
|
|
574 case GUDECL:
|
|
|
575 nsc = FIELD;
|
|
|
576 ndsp = 0;
|
|
|
577 if (disp < sz) disp = sz;
|
|
|
578 break;
|
|
|
579 case GTDECL:
|
|
|
580 nsc = TYPE;
|
|
|
581 break;
|
|
|
582 case ADECL:
|
|
|
583 if(type==CHAR) ++(n->dsp);
|
|
|
584 else if (!scalar(type)) error(TYERR);
|
|
|
585 return;
|
|
|
586 case LDECL:
|
|
|
587 nsc = LVAR;
|
|
|
588 ndsp = (disp -= sz);
|
|
|
589 break;
|
|
|
590 case LSDECL:
|
|
|
591 nsc = FIELD;
|
|
|
592 ndsp = disp;
|
|
|
593 disp += sz;
|
|
|
594 break;
|
|
|
595 case LUDECL:
|
|
|
596 nsc = FIELD;
|
|
|
597 ndsp = 0;
|
|
|
598 if (disp < sz) disp = sz;
|
|
|
599 break;
|
|
|
600 case LTDECL:
|
|
|
601 nsc = TYPE;
|
|
|
602 break;
|
|
|
603 default:
|
|
|
604 error(DCERR);
|
|
|
605 }
|
|
|
606 n->sc = nsc;
|
|
|
607 n->dsp = ndsp;
|
|
|
608 }
|
|
|
609 sdecl(s)
|
|
|
610 int s;
|
|
|
611 {int smode,sdisp,type;
|
|
|
612 NMTBL *nptr0;
|
|
|
613 smode=mode;
|
|
|
614 if (mode==GDECL || mode==GSDECL || mode==GUDECL || mode==GTDECL)
|
|
|
615 mode=(s==STRUCT?GSDECL:GUDECL);
|
|
|
616 else mode=(s==STRUCT?LSDECL:LUDECL);
|
|
|
617 sdisp=disp;
|
|
|
618 disp=0;
|
|
|
619 if (getsym() == IDENT)
|
|
|
620 { nptr0 = nptr;
|
|
|
621 if (getsym() == LC)
|
|
|
622 { if (nptr0->sc != EMPTY) error(DCERR);
|
|
|
623 nptr0->sc = TAG;
|
|
|
624 nptr0->ty = list2(s,-1);
|
|
|
625 while (getsym() != RC) decl();
|
|
|
626 getsym();
|
|
|
627 rplacad(type = nptr0->ty,disp);
|
|
|
628 }
|
|
|
629 else
|
|
|
630 { if(nptr0->sc == EMPTY) nptr0=gnptr;
|
|
|
631 if(nptr0->sc == EMPTY) error(UDERR);
|
|
|
632 if(nptr0->sc != TAG) error(TYERR);
|
|
|
633 type = nptr0->ty;
|
|
|
634 }
|
|
|
635 }
|
|
|
636 else if(sym==LC)
|
|
|
637 { while(getsym() != RC) decl();
|
|
|
638 getsym();
|
|
|
639 type = list2(s,disp);
|
|
|
640 }
|
|
|
641 else error(DCERR);
|
|
|
642 disp=sdisp;
|
|
|
643 mode=smode;
|
|
|
644 return type;
|
|
|
645 }
|
|
|
646 fdecl(n)
|
|
|
647 NMTBL *n;
|
|
|
648 { args=0;
|
|
|
649 fcheck(n);
|
|
|
650 mode=ADECL;
|
|
|
651 lfree= HEAPSIZE;
|
|
|
652 while (sym!=LC) {decl(); getsym();}
|
|
|
653 disp=0;
|
|
|
654 mode=STAT;
|
|
|
655 while (typeid(getsym()) || sym==STATIC || sym==TYPEDEF)
|
|
|
656 { mode=LDECL;
|
|
|
657 decl();
|
|
|
658 mode=STAT;
|
|
|
659 }
|
|
|
660 control=1;
|
|
|
661 printf("%s\n\tPSHS\tU\n\tLEAU\t,S\n",n->nm);
|
|
|
662 if(disp) printf("\tLEAS\t%d,S\n",disp);
|
|
|
663 lvar= -disp;
|
|
|
664 while(sym!=RC) statement();
|
|
|
665 if (control) return2();
|
|
|
666 }
|
|
|
667 fcheck(n)
|
|
|
668 NMTBL *n;
|
|
|
669 { if(mode!=GDECL||car(type)!=FUNCTION) error(DCERR);
|
|
|
670 if(n->sc==FUNCTION) compatible(n->ty,cadr(type));
|
|
|
671 else if(n->sc!=EMPTY) error(DCERR);
|
|
|
672 n->sc=FUNCTION;
|
|
|
673 n->ty=cadr(type);
|
|
|
674 }
|
|
|
675 compatible(t1,t2)
|
|
|
676 int t1,t2;
|
|
|
677 { if(integral(t1))
|
|
|
678 { if(t1!=t2) error(TYERR);
|
|
|
679 }
|
|
|
680 else if(car(t1)!=car(t2)) error(TYERR);
|
|
|
681 else if((car(t1)==STRUCT || car(t1)==UNION) && cadr(t1)!=cadr(t2))
|
|
|
682 error(TYERR);
|
|
|
683 else if(car(t1)==POINTER || car(t1)==ARRAY ||car(t1)==FUNCTION)
|
|
|
684 compatible(cadr(t1),cadr(t2));
|
|
|
685 }
|
|
|
686 scalar(t)
|
|
|
687 int t;
|
|
|
688 { return(integral(t)||car(t)==POINTER);
|
|
|
689 }
|
|
|
690 integral(t)
|
|
|
691 int t;
|
|
|
692 { return(t==INT||t==CHAR||t==UNSIGNED);
|
|
|
693 }
|
|
|
694
|
|
|
695 statement()
|
|
|
696 {int slfree;
|
|
|
697 switch(sym)
|
|
|
698 {case IF:
|
|
|
699 doif();
|
|
|
700 return;
|
|
|
701 case WHILE:
|
|
|
702 dowhile();
|
|
|
703 return;
|
|
|
704 case DO:
|
|
|
705 dodo();
|
|
|
706 return;
|
|
|
707 case FOR:
|
|
|
708 dofor();
|
|
|
709 return;
|
|
|
710 case SWITCH:
|
|
|
711 doswitch();
|
|
|
712 return;
|
|
|
713 case LC:
|
|
|
714 docomp();
|
|
|
715 return;
|
|
|
716 case BREAK:
|
|
|
717 jmp(blabel);
|
|
|
718 getsym();
|
|
|
719 checksym(SM);
|
|
|
720 return;
|
|
|
721 case CONTINUE:
|
|
|
722 jmp(clabel);
|
|
|
723 getsym();
|
|
|
724 checksym(SM);
|
|
|
725 return;
|
|
|
726 case CASE:
|
|
|
727 docase();
|
|
|
728 statement();
|
|
|
729 return;
|
|
|
730 case DEFAULT:
|
|
|
731 dodefault();
|
|
|
732 statement();
|
|
|
733 return;
|
|
|
734 case RETURN:
|
|
|
735 doreturn();
|
|
|
736 return;
|
|
|
737 case GOTO:
|
|
|
738 dogoto();
|
|
|
739 return;
|
|
|
740 case SM:
|
|
|
741 getsym();
|
|
|
742 return;
|
|
|
743 default:if(sym==IDENT&&skipspc()==':')
|
|
|
744 { dolabel();
|
|
|
745 statement();
|
|
|
746 }
|
|
|
747 else
|
|
|
748 { slfree=lfree;
|
|
|
749 gexpr(expr());
|
|
|
750 lfree=slfree;
|
|
|
751 checksym(SM);
|
|
|
752 }
|
|
|
753 }
|
|
|
754 }
|
|
|
755 doif()
|
|
|
756 {int l1,l2,slfree;
|
|
|
757 getsym();
|
|
|
758 checksym(LPAR);
|
|
|
759 slfree=lfree;
|
|
|
760 bexpr(expr(),0,l1=fwdlabel());
|
|
|
761 lfree=slfree;
|
|
|
762 checksym(RPAR);
|
|
|
763 statement();
|
|
|
764 if(sym==ELSE)
|
|
|
765 { if (l2 = control) jmp(l2=fwdlabel());
|
|
|
766 fwddef(l1);
|
|
|
767 getsym();
|
|
|
768 statement();
|
|
|
769 if (l2) fwddef(l2);
|
|
|
770 }
|
|
|
771 else fwddef(l1);
|
|
|
772 }
|
|
|
773 dowhile()
|
|
|
774 {int sbreak,scontinue,slfree,e;
|
|
|
775 sbreak=blabel;
|
|
|
776 scontinue=clabel;
|
|
|
777 blabel=fwdlabel();
|
|
|
778 clabel=backdef();
|
|
|
779 getsym();
|
|
|
780 checksym(LPAR);
|
|
|
781 slfree=lfree;
|
|
|
782 e=expr();
|
|
|
783 checksym(RPAR);
|
|
|
784 if(sym==SM)
|
|
|
785 { bexpr(e,1,clabel);
|
|
|
786 lfree=slfree;
|
|
|
787 getsym();
|
|
|
788 }
|
|
|
789 else
|
|
|
790 { bexpr(e,0,blabel);
|
|
|
791 lfree=slfree;
|
|
|
792 statement();
|
|
|
793 jmp(clabel);
|
|
|
794 }
|
|
|
795 fwddef(blabel);
|
|
|
796 clabel=scontinue;
|
|
|
797 blabel=sbreak;
|
|
|
798 }
|
|
|
799 dodo()
|
|
|
800 {int sbreak,scontinue,l,slfree;
|
|
|
801 sbreak=blabel;
|
|
|
802 scontinue=clabel;
|
|
|
803 blabel=fwdlabel();
|
|
|
804 clabel=fwdlabel();
|
|
|
805 l=backdef();
|
|
|
806 getsym();
|
|
|
807 statement();
|
|
|
808 fwddef(clabel);
|
|
|
809 checksym(WHILE);
|
|
|
810 checksym(LPAR);
|
|
|
811 slfree=lfree;
|
|
|
812 bexpr(expr(),1,l);
|
|
|
813 lfree=slfree;
|
|
|
814 checksym(RPAR);
|
|
|
815 checksym(SM);
|
|
|
816 fwddef(blabel);
|
|
|
817 clabel=scontinue;
|
|
|
818 blabel=sbreak;
|
|
|
819 }
|
|
|
820 dofor()
|
|
|
821 {int sbreak,scontinue,l,e,slfree;
|
|
|
822 sbreak=blabel;
|
|
|
823 scontinue=clabel;
|
|
|
824 blabel=fwdlabel();
|
|
|
825 getsym();
|
|
|
826 checksym(LPAR);
|
|
|
827 slfree=lfree;
|
|
|
828 if(sym!=SM)
|
|
|
829 { gexpr(expr());
|
|
|
830 checksym(SM);
|
|
|
831 }
|
|
|
832 else getsym();
|
|
|
833 lfree=slfree;
|
|
|
834 l=backdef();
|
|
|
835 if(sym!=SM)
|
|
|
836 { bexpr(expr(),0,blabel);
|
|
|
837 checksym(SM);
|
|
|
838 }
|
|
|
839 else getsym();
|
|
|
840 lfree=slfree;
|
|
|
841 if(sym==RPAR)
|
|
|
842 { clabel=l;
|
|
|
843 getsym();
|
|
|
844 statement();
|
|
|
845 }
|
|
|
846 else
|
|
|
847 { clabel=fwdlabel();
|
|
|
848 e=expr();
|
|
|
849 checksym(RPAR);
|
|
|
850 statement();
|
|
|
851 fwddef(clabel);
|
|
|
852 gexpr(e);
|
|
|
853 lfree=slfree;
|
|
|
854 }
|
|
|
855 jmp(l);
|
|
|
856 fwddef(blabel);
|
|
|
857 clabel=scontinue;
|
|
|
858 blabel=sbreak;
|
|
|
859 }
|
|
|
860 doswitch()
|
|
|
861 {int sbreak,scase,sdefault,slfree;
|
|
|
862 sbreak=blabel;
|
|
|
863 blabel=fwdlabel();
|
|
|
864 sdefault=dlabel;
|
|
|
865 dlabel=0;
|
|
|
866 scase=cslabel;
|
|
|
867 getsym();
|
|
|
868 checksym(LPAR);
|
|
|
869 slfree=lfree;
|
|
|
870 gexpr(expr());
|
|
|
871 lfree=slfree;
|
|
|
872 checksym(RPAR);
|
|
|
873 cslabel = control = 0;
|
|
|
874 statement();
|
|
|
875 if(dlabel) printf("_%d\tEQU\t_%d\n",cslabel,dlabel);
|
|
|
876 else fwddef(cslabel);
|
|
|
877 cslabel=scase;
|
|
|
878 dlabel=sdefault;
|
|
|
879 fwddef(blabel);
|
|
|
880 blabel=sbreak;
|
|
|
881 }
|
|
|
882 docomp()
|
|
|
883 { getsym();
|
|
|
884 while(sym!=RC) statement();
|
|
|
885 getsym();
|
|
|
886 }
|
|
|
887 docase()
|
|
|
888 {int c,n,l,slfree;
|
|
|
889 c=0;
|
|
|
890 n=2;
|
|
|
891 slfree=lfree;
|
|
|
892 while(sym==CASE)
|
|
|
893 { getsym();
|
|
|
894 c=list2(cexpr(expr()),c);
|
|
|
895 n+=6;
|
|
|
896 checksym(COLON);
|
|
|
897 }
|
|
|
898 l=fwdlabel();
|
|
|
899 if (control)
|
|
|
900 { control=0;
|
|
|
901 if (n>127) jmp(l);
|
|
|
902 else printf("\tBRA\t_%d\n",l);
|
|
|
903 }
|
|
|
904 if (cslabel) fwddef(cslabel);
|
|
|
905 while(cadr(c))
|
|
|
906 { cmpdimm(car(c));
|
|
|
907 if((n-=6)>127) jcond(l,0);
|
|
|
908 else printf("\tBEQ\t_%d\n",l);
|
|
|
909 c=cadr(c);
|
|
|
910 }
|
|
|
911 lfree=slfree;
|
|
|
912 cmpdimm(car(c));
|
|
|
913 jcond(cslabel=fwdlabel(),1);
|
|
|
914 fwddef(l);
|
|
|
915 }
|
|
|
916 dodefault()
|
|
|
917 { getsym();
|
|
|
918 checksym(COLON);
|
|
|
919 if (dlabel) error(STERR);
|
|
|
920 if (!cslabel) jmp(cslabel = fwdlabel());
|
|
|
921 dlabel = backdef();
|
|
|
922 }
|
|
|
923 doreturn()
|
|
|
924 {int slfree;
|
|
|
925 if(getsym()==SM)
|
|
|
926 { getsym();
|
|
|
927 return2();
|
|
|
928 return;
|
|
|
929 }
|
|
|
930 slfree=lfree;
|
|
|
931 gexpr(expr());
|
|
|
932 lfree=slfree;
|
|
|
933 checksym(SM);
|
|
|
934 control=0;
|
|
|
935 switch(lvar)
|
|
|
936 {case 0:
|
|
|
937 ret("");
|
|
|
938 return;
|
|
|
939 case 2:
|
|
|
940 ret("X,");
|
|
|
941 return;
|
|
|
942 default:unlink();
|
|
|
943 return;
|
|
|
944 }
|
|
|
945 }
|
|
|
946 return2()
|
|
|
947 { control=0;
|
|
|
948 switch(lvar)
|
|
|
949 {case 0:
|
|
|
950 ret("");
|
|
|
951 return;
|
|
|
952 case 1:
|
|
|
953 ret("A,");
|
|
|
954 return;
|
|
|
955 case 2:
|
|
|
956 ret("D,");
|
|
|
957 return;
|
|
|
958 case 3:
|
|
|
959 ret("A,X,");
|
|
|
960 return;
|
|
|
961 case 4:
|
|
|
962 ret("D,X,");
|
|
|
963 return;
|
|
|
964 default:unlink();
|
|
|
965 return;
|
|
|
966 }
|
|
|
967 }
|
|
|
968 ret(reg)
|
|
|
969 char *reg;
|
|
|
970 { printf("\tPULS\t%sU,PC\n",reg);
|
|
|
971 }
|
|
|
972 unlink()
|
|
|
973 { printf("\tLEAS\t,U\n");
|
|
|
974 ret("");
|
|
|
975 }
|
|
|
976 dogoto()
|
|
|
977 {NMTBL *nptr0;
|
|
|
978 getsym();
|
|
|
979 nptr0=nptr;
|
|
|
980 checksym(IDENT);
|
|
|
981 if(nptr0->sc == BLABEL || nptr0->sc == FLABEL) jmp(nptr0->dsp);
|
|
|
982 else if(nptr0->sc == EMPTY)
|
|
|
983 { nptr0->sc = FLABEL;
|
|
|
984 jmp(nptr0->dsp = fwdlabel());
|
|
|
985 }
|
|
|
986 else error(STERR);
|
|
|
987 checksym(SM);
|
|
|
988 }
|
|
|
989 dolabel()
|
|
|
990 { if(nptr->sc == FLABEL) fwddef(nptr->dsp);
|
|
|
991 else if(nptr->sc != EMPTY) error(TYERR);
|
|
|
992 nptr->sc = BLABEL;
|
|
|
993 nptr->dsp = backdef();
|
|
|
994 getsym();
|
|
|
995 checksym(COLON);
|
|
|
996 }
|
|
|
997
|
|
|
998 expr()
|
|
|
999 { return(rvalue(expr0()));
|
|
|
1000 }
|
|
|
1001 expr0()
|
|
|
1002 {int e;
|
|
|
1003 e=expr1();
|
|
|
1004 while(sym==COMMA) {getsym();e=list3(COMMA,e,rvalue(expr1()));}
|
|
|
1005 return e;
|
|
|
1006 }
|
|
|
1007 expr1()
|
|
|
1008 {int e1,e2,t,op;
|
|
|
1009 e1=expr2();
|
|
|
1010 switch (sym)
|
|
|
1011 {case ASS:
|
|
|
1012 lcheck(e1);
|
|
|
1013 t=type;
|
|
|
1014 getsym();
|
|
|
1015 e2=rvalue(expr1());
|
|
|
1016 if(t==CHAR) {type= INT;return(list3(CASS,e1,e2));}
|
|
|
1017 type=t;
|
|
|
1018 return(list3(ASS,e1,e2));
|
|
|
1019 case ADD+AS: case SUB+AS: case MUL+AS: case DIV+AS: case MOD+AS:
|
|
|
1020 case RSHIFT+AS: case LSHIFT+AS: case BAND+AS: case EOR+AS: case BOR+AS:
|
|
|
1021 op = sym-AS;
|
|
|
1022 lcheck(e1);
|
|
|
1023 t=type;
|
|
|
1024 getsym();
|
|
|
1025 e2=rvalue(expr1());
|
|
|
1026 if(!integral(type)) error(TYERR);
|
|
|
1027 if((t==UNSIGNED||type==UNSIGNED)&&
|
|
|
1028 (op==MUL||op==DIV||op==MOD||op==RSHIFT||op==LSHIFT))
|
|
|
1029 op=op+US;
|
|
|
1030 if(t==CHAR)
|
|
|
1031 { type= INT;
|
|
|
1032 return(list4(CASSOP,e1,e2,op));
|
|
|
1033 }
|
|
|
1034 type=t;
|
|
|
1035 if(integral(t)) return(list4(ASSOP,e1,e2,op));
|
|
|
1036 if((op!=ADD&&op!=SUB)||car(t)!=POINTER) error(TYERR);
|
|
|
1037 e2=binop(MUL,e2,list2(CONST,size(cadr(t))),INT,UNSIGNED);
|
|
|
1038 type=t;
|
|
|
1039 return list4(ASSOP,e1,e2,op);
|
|
|
1040 default:
|
|
|
1041 return(e1);
|
|
|
1042 }
|
|
|
1043 }
|
|
|
1044 expr2()
|
|
|
1045 {int e1,e2,e3,t;
|
|
|
1046 e1=expr3();
|
|
|
1047 if(sym==COND)
|
|
|
1048 { e1=rvalue(e1);
|
|
|
1049 getsym();
|
|
|
1050 e2=rvalue(expr2());
|
|
|
1051 t=type;
|
|
|
1052 checksym(COLON);
|
|
|
1053 e3=rvalue(expr2());
|
|
|
1054 if(car(e1)==CONST)
|
|
|
1055 if(cadr(e1)) {type=t;return e2;}
|
|
|
1056 else return e3;
|
|
|
1057 if(type==INT||t!=INT&&type==UNSIGNED) type=t;
|
|
|
1058 return(list4(COND,e1,e2,e3));
|
|
|
1059 }
|
|
|
1060 return(e1);
|
|
|
1061 }
|
|
|
1062 expr3()
|
|
|
1063 {int e;
|
|
|
1064 e=expr4();
|
|
|
1065 while(sym==LOR)
|
|
|
1066 { e=rvalue(e);
|
|
|
1067 getsym();
|
|
|
1068 e=list3(LOR,e,rvalue(expr4()));
|
|
|
1069 type= INT;
|
|
|
1070 }
|
|
|
1071 return(e);
|
|
|
1072 }
|
|
|
1073 expr4()
|
|
|
1074 {int e;
|
|
|
1075 e=expr5();
|
|
|
1076 while(sym==LAND)
|
|
|
1077 { e=rvalue(e);
|
|
|
1078 getsym();
|
|
|
1079 e=list3(LAND,e,rvalue(expr5()));
|
|
|
1080 type= INT;
|
|
|
1081 }
|
|
|
1082 return(e);
|
|
|
1083 }
|
|
|
1084 expr5()
|
|
|
1085 {int e1,e2,t;
|
|
|
1086 e1=expr6();
|
|
|
1087 while(sym==BOR)
|
|
|
1088 { e1=rvalue(e1);
|
|
|
1089 t=type;
|
|
|
1090 getsym();
|
|
|
1091 e2=rvalue(expr6());
|
|
|
1092 e1=binop(BOR,e1,e2,t,type);
|
|
|
1093 }
|
|
|
1094 return(e1);
|
|
|
1095 }
|
|
|
1096 expr6()
|
|
|
1097 {int e1,e2,t;
|
|
|
1098 e1=expr7();
|
|
|
1099 while(sym==EOR)
|
|
|
1100 { e1=rvalue(e1);
|
|
|
1101 t=type;
|
|
|
1102 getsym();
|
|
|
1103 e2=rvalue(expr7());
|
|
|
1104 e1=binop(EOR,e1,e2,t,type);
|
|
|
1105 }
|
|
|
1106 return(e1);
|
|
|
1107 }
|
|
|
1108 expr7()
|
|
|
1109 {int e1,e2,t;
|
|
|
1110 e1=expr8();
|
|
|
1111 while(sym==BAND)
|
|
|
1112 { e1=rvalue(e1);
|
|
|
1113 t=type;
|
|
|
1114 getsym();
|
|
|
1115 e2=rvalue(expr8());
|
|
|
1116 e1=binop(BAND,e1,e2,t,type);
|
|
|
1117 }
|
|
|
1118 return(e1);
|
|
|
1119 }
|
|
|
1120 expr8()
|
|
|
1121 {int e,op;
|
|
|
1122 e=expr9();
|
|
|
1123 while((op=sym)==EQ||op==NEQ)
|
|
|
1124 { e=rvalue(e);
|
|
|
1125 getsym();
|
|
|
1126 e=list3(op,e,rvalue(expr9()));
|
|
|
1127 type= INT;
|
|
|
1128 }
|
|
|
1129 return e;
|
|
|
1130 }
|
|
|
1131 expr9()
|
|
|
1132 {int e1,e2,t,op;
|
|
|
1133 e1=expr10();
|
|
|
1134 while((op=sym)==GT||op==GE||op==LT||op==LE)
|
|
|
1135 { e1=rvalue(e1);
|
|
|
1136 t=type;
|
|
|
1137 getsym();
|
|
|
1138 e2=rvalue(expr10());
|
|
|
1139 if(t==INT&&type==INT) e1=list3(op,e1,e2);
|
|
|
1140 else e1=list3(op+US,e1,e2);
|
|
|
1141 type= INT;
|
|
|
1142 }
|
|
|
1143 return e1;
|
|
|
1144 }
|
|
|
1145 expr10()
|
|
|
1146 {int e1,e2,t,op;
|
|
|
1147 e1=expr11();
|
|
|
1148 while((op=sym)==RSHIFT||op==LSHIFT)
|
|
|
1149 { e1=rvalue(e1);
|
|
|
1150 t=type;
|
|
|
1151 getsym();
|
|
|
1152 e2=rvalue(expr11());
|
|
|
1153 e1=binop(op,e1,e2,t,type);
|
|
|
1154 }
|
|
|
1155 return e1;
|
|
|
1156 }
|
|
|
1157 expr11()
|
|
|
1158 {int e1,e2,t,op;
|
|
|
1159 e1=expr12();
|
|
|
1160 while((op=sym)==ADD||op==SUB)
|
|
|
1161 { e1=rvalue(e1);
|
|
|
1162 t=type;
|
|
|
1163 getsym();
|
|
|
1164 e2=rvalue(expr12());
|
|
|
1165 e1=binop(op,e1,e2,t,type);
|
|
|
1166 }
|
|
|
1167 return e1;
|
|
|
1168 }
|
|
|
1169 expr12()
|
|
|
1170 {int e1,e2,t,op;
|
|
|
1171 e1=expr13();
|
|
|
1172 while((op=sym)==MUL||op==DIV||op==MOD)
|
|
|
1173 { e1=rvalue(e1);
|
|
|
1174 t=type;
|
|
|
1175 getsym();
|
|
|
1176 e2=rvalue(expr13());
|
|
|
1177 e1=binop(op,e1,e2,t,type);
|
|
|
1178 }
|
|
|
1179 return e1;
|
|
|
1180 }
|
|
|
1181 expr13()
|
|
|
1182 {int e,op;
|
|
|
1183 switch (op = sym)
|
|
|
1184 {case INC: case DEC:
|
|
|
1185 getsym();
|
|
|
1186 lcheck(e=expr13());
|
|
|
1187 if(type==CHAR)
|
|
|
1188 { type= INT;
|
|
|
1189 return(list2(op==INC?CPREINC:CPREDEC,e));
|
|
|
1190 }
|
|
|
1191 if(integral(type))
|
|
|
1192 return(list3(PREINC,e,op==INC?1:-1));
|
|
|
1193 if(car(type)!=POINTER) error(TYERR);
|
|
|
1194 return(list3(PREINC,e,
|
|
|
1195 op==INC?size(cadr(type)):-size(cadr(type)) ));
|
|
|
1196 case MUL:
|
|
|
1197 getsym();
|
|
|
1198 e=rvalue(expr13());
|
|
|
1199 return(indop(e));
|
|
|
1200 case BAND:
|
|
|
1201 getsym();
|
|
|
1202 switch(car(e=expr13()))
|
|
|
1203 {case INDIRECT:
|
|
|
1204 e=cadr(e);
|
|
|
1205 break;
|
|
|
1206 case GVAR:
|
|
|
1207 case LVAR:
|
|
|
1208 e=list2(ADDRESS,e);
|
|
|
1209 break;
|
|
|
1210 case FNAME:
|
|
|
1211 return e;
|
|
|
1212 default:error(LVERR);
|
|
|
1213 }
|
|
|
1214 type=list2(POINTER,type);
|
|
|
1215 return e;
|
|
|
1216 case SUB:
|
|
|
1217 getsym();
|
|
|
1218 e=rvalue(expr13());
|
|
|
1219 if(!integral(type)) error(TYERR);
|
|
|
1220 return(car(e)==CONST?list2(CONST,-cadr(e)):list2(MINUS,e));
|
|
|
1221 case BNOT:
|
|
|
1222 getsym();
|
|
|
1223 e=rvalue(expr13());
|
|
|
1224 if(!integral(type)) error(TYERR);
|
|
|
1225 return(car(e)==CONST?list2(CONST,~cadr(e)):list2(BNOT,e));
|
|
|
1226 case LNOT:
|
|
|
1227 getsym();
|
|
|
1228 return(list2(LNOT,rvalue(expr13())));
|
|
|
1229 case SIZEOF:
|
|
|
1230 if(getsym()==LPAR)
|
|
|
1231 if(typeid(getsym()))
|
|
|
1232 { e=list2(CONST,size(typename()));
|
|
|
1233 type=INT;
|
|
|
1234 checksym(RPAR);
|
|
|
1235 return e;
|
|
|
1236 }
|
|
|
1237 else
|
|
|
1238 { e=expr0();
|
|
|
1239 checksym(RPAR);
|
|
|
1240 expr16(e);
|
|
|
1241 if(sym==INC||sym==DEC)
|
|
|
1242 { getsym();
|
|
|
1243 if(type==CHAR) type=INT;
|
|
|
1244 else if(!scalar(type))
|
|
|
1245 error(TYERR);
|
|
|
1246 }
|
|
|
1247 }
|
|
|
1248 else expr13();
|
|
|
1249 e=list2(CONST,size(type));
|
|
|
1250 type=INT;
|
|
|
1251 return e;
|
|
|
1252 }
|
|
|
1253 e=expr14();
|
|
|
1254 if((op=sym)==INC||op==DEC)
|
|
|
1255 { lcheck(e);
|
|
|
1256 getsym();
|
|
|
1257 if(type==CHAR)
|
|
|
1258 { type= INT;
|
|
|
1259 return(list2(op==INC?CPOSTINC:CPOSTDEC,e));
|
|
|
1260 }
|
|
|
1261 if(integral(type))
|
|
|
1262 return(list3(POSTINC,e,op==INC?1:-1));
|
|
|
1263 if(car(type)!=POINTER) error(TYERR);
|
|
|
1264 return (list3(POSTINC,e,
|
|
|
1265 op == INC ? size(cadr(type)): -size(cadr(type)) ));
|
|
|
1266 }
|
|
|
1267 return e;
|
|
|
1268 }
|
|
|
1269 expr14()
|
|
|
1270 {int e1,t;
|
|
|
1271 switch(sym)
|
|
|
1272 {case IDENT:
|
|
|
1273 switch(nptr->sc)
|
|
|
1274 {case GVAR:
|
|
|
1275 e1=list2(GVAR,nptr->dsp);
|
|
|
1276 type=nptr->ty;
|
|
|
1277 getsym();
|
|
|
1278 break;
|
|
|
1279 case LVAR:
|
|
|
1280 e1=list2(LVAR,nptr->dsp);
|
|
|
1281 type=nptr->ty;
|
|
|
1282 getsym();
|
|
|
1283 break;
|
|
|
1284 case FUNCTION:
|
|
|
1285 e1=list2(FNAME,(int)nptr);
|
|
|
1286 type=list2(FUNCTION,nptr->ty);
|
|
|
1287 getsym();
|
|
|
1288 break;
|
|
|
1289 case EMPTY:
|
|
|
1290 if(getsym()==LPAR)
|
|
|
1291 { nptr->sc = FUNCTION;
|
|
|
1292 nptr->ty= INT;
|
|
|
1293 type= list2(FUNCTION,INT);
|
|
|
1294 e1=expr15(list2(FNAME,(int)nptr));
|
|
|
1295 break;
|
|
|
1296 }
|
|
|
1297 default:error(UDERR);
|
|
|
1298 }
|
|
|
1299 break;
|
|
|
1300 case STRING:
|
|
|
1301 e1=list3(STRING,(int)sptr,symval);
|
|
|
1302 type=list3(ARRAY,CHAR,symval);
|
|
|
1303 getsym();
|
|
|
1304 break;
|
|
|
1305 case CONST:
|
|
|
1306 type= INT;
|
|
|
1307 e1=list2(CONST,symval);
|
|
|
1308 getsym();
|
|
|
1309 break;
|
|
|
1310 case LPAR:
|
|
|
1311 if(typeid(getsym()))
|
|
|
1312 { t=typename();
|
|
|
1313 checksym(RPAR);
|
|
|
1314 e1=expr13();
|
|
|
1315 type=t;
|
|
|
1316 return e1;
|
|
|
1317 }
|
|
|
1318 e1=expr0();
|
|
|
1319 checksym(RPAR);
|
|
|
1320 break;
|
|
|
1321 default:error(EXERR);
|
|
|
1322 }
|
|
|
1323 return expr16(e1);
|
|
|
1324 }
|
|
|
1325 expr16(e1)
|
|
|
1326 int e1;
|
|
|
1327 {int e2,t;
|
|
|
1328 while(1)
|
|
|
1329 if(sym==LBRA)
|
|
|
1330 { e1=rvalue(e1);
|
|
|
1331 t=type;
|
|
|
1332 getsym();
|
|
|
1333 e2=rvalue(expr0());
|
|
|
1334 checksym(RBRA);
|
|
|
1335 e1=binop(ADD,e1,e2,t,type);
|
|
|
1336 e1=indop(e1);
|
|
|
1337 }
|
|
|
1338 else if(sym==LPAR) e1=expr15(e1);
|
|
|
1339 else if(sym==PERIOD) e1=strop(e1);
|
|
|
1340 else if(sym==ARROW) e1=strop(indop(rvalue(e1)));
|
|
|
1341 else break;
|
|
|
1342 if(car(e1)==FNAME) type=list2(POINTER,type);
|
|
|
1343 return e1;
|
|
|
1344 }
|
|
|
1345 rvalue(e)
|
|
|
1346 int e;
|
|
|
1347 { if(type==CHAR)
|
|
|
1348 { type= INT;
|
|
|
1349 switch(car(e))
|
|
|
1350 {case GVAR:
|
|
|
1351 return(list2(CRGVAR,cadr(e)));
|
|
|
1352 case LVAR:
|
|
|
1353 return(list2(CRLVAR,cadr(e)));
|
|
|
1354 case INDIRECT:
|
|
|
1355 return(list2(CRINDIRECT,cadr(e)));
|
|
|
1356 default:return(e);
|
|
|
1357 }
|
|
|
1358 }
|
|
|
1359 if(!integral(type))
|
|
|
1360 if(car(type)==ARRAY)
|
|
|
1361 { type=list2(POINTER,cadr(type));
|
|
|
1362 if(car(e)==INDIRECT) return cadr(e);
|
|
|
1363 return list2(ADDRESS,e);
|
|
|
1364 }
|
|
|
1365 else if(car(type)!=POINTER) error(TYERR);
|
|
|
1366 switch(car(e))
|
|
|
1367 {case GVAR:
|
|
|
1368 return(list2(RGVAR,cadr(e)));
|
|
|
1369 case LVAR:
|
|
|
1370 return(list2(RLVAR,cadr(e)));
|
|
|
1371 case INDIRECT:
|
|
|
1372 return(list2(RINDIRECT,cadr(e)));
|
|
|
1373 default:return(e);
|
|
|
1374 }
|
|
|
1375 }
|
|
|
1376 lcheck(e)
|
|
|
1377 int e;
|
|
|
1378 { if(!scalar(type)||car(e)!=GVAR&&car(e)!=LVAR&&car(e)!=INDIRECT)
|
|
|
1379 error(LVERR);
|
|
|
1380 }
|
|
|
1381 indop(e)
|
|
|
1382 int e;
|
|
|
1383 { if(type!=INT&&type!=UNSIGNED)
|
|
|
1384 if(car(type)==POINTER) type=cadr(type);
|
|
|
1385 else error(TYERR);
|
|
|
1386 else type= CHAR;
|
|
|
1387 if(car(e)==ADDRESS) return(cadr(e));
|
|
|
1388 return(list2(INDIRECT,e));
|
|
|
1389 }
|
|
|
1390 strop(e)
|
|
|
1391 { getsym();
|
|
|
1392 if (sym!=IDENT||nptr->sc!=FIELD) error(TYERR);
|
|
|
1393 if (integral(type)||car(type)!=STRUCT && car(type)!=UNION)
|
|
|
1394 e=rvalue(e);
|
|
|
1395 type = nptr->ty;
|
|
|
1396 switch(car(e))
|
|
|
1397 {case GVAR:
|
|
|
1398 case LVAR:
|
|
|
1399 e=list2(car(e),cadr(e) + nptr->dsp);
|
|
|
1400 break;
|
|
|
1401 case INDIRECT:
|
|
|
1402 if(!nptr->dsp) break;
|
|
|
1403 e=list2(INDIRECT,list3(ADD,cadr(e),list2(CONST,nptr->dsp)));
|
|
|
1404 break;
|
|
|
1405 default:
|
|
|
1406 e=list2(INDIRECT,list3(ADD,e,list2(CONST,nptr->dsp)));
|
|
|
1407 }
|
|
|
1408 getsym();
|
|
|
1409 return e;
|
|
|
1410 }
|
|
|
1411 binop(op,e1,e2,t1,t2)
|
|
|
1412 int op,e1,e2,t1,t2;
|
|
|
1413 {int e;
|
|
|
1414 if(car(e1)==CONST&&car(e2)==CONST)
|
|
|
1415 { e1=cadr(e1);
|
|
|
1416 e2=cadr(e2);
|
|
|
1417 type= INT;
|
|
|
1418 switch(op)
|
|
|
1419 {case BOR:
|
|
|
1420 e=e1|e2;break;
|
|
|
1421 case EOR:
|
|
|
1422 e=e1^e2;break;
|
|
|
1423 case BAND:
|
|
|
1424 e=e1&e2;break;
|
|
|
1425 case ADD:
|
|
|
1426 if(integral(t1))
|
|
|
1427 { if(integral(t2))
|
|
|
1428 e=e1+e2;
|
|
|
1429 else
|
|
|
1430 { if(car(t2)!=POINTER) error(TYERR);
|
|
|
1431 e=size(cadr(t2))*e1+e2;
|
|
|
1432 type=t2;
|
|
|
1433 }
|
|
|
1434 }
|
|
|
1435 else
|
|
|
1436 { if(car(t1)!=POINTER) error(TYERR);
|
|
|
1437 e=e1+size(cadr(t1))*e2;
|
|
|
1438 type=t1;
|
|
|
1439 }
|
|
|
1440 break;
|
|
|
1441 case SUB:
|
|
|
1442 if(integral(t1))
|
|
|
1443 e=e1-e2;
|
|
|
1444 else
|
|
|
1445 { if(car(t1)!=POINTER) error(TYERR);
|
|
|
1446 e=e1-size(cadr(t1))*e2;
|
|
|
1447 type=t1;
|
|
|
1448 }
|
|
|
1449 break;
|
|
|
1450 case MUL:
|
|
|
1451 e=e1*e2;break;
|
|
|
1452 case DIV:
|
|
|
1453 if(!e2) error(EXERR);e=e1/e2;break;
|
|
|
1454 case MOD:
|
|
|
1455 if(!e2) error(EXERR);e=e1%e2;break;
|
|
|
1456 case RSHIFT:
|
|
|
1457 e=e1>>e2;break;
|
|
|
1458 case LSHIFT:
|
|
|
1459 e=e1<<e2;
|
|
|
1460 }
|
|
|
1461 return list2(CONST,e);
|
|
|
1462 }
|
|
|
1463 if((op==ADD||op==MUL||op==BOR||op==EOR||op==BAND)&&
|
|
|
1464 (car(e1)==CONST||car(e2)!=CONST&&
|
|
|
1465 (car(e1)==RGVAR||car(e1)==RLVAR)))
|
|
|
1466 {e=e1;e1=e2;e2=e;e=t1;t1=t2;t2=e;}
|
|
|
1467 if(op==ADD)
|
|
|
1468 { if(integral(t1))
|
|
|
1469 { if(integral(t2))
|
|
|
1470 { if(t1==INT) type=t2;else type=t1;
|
|
|
1471 return(list3(ADD,e1,e2));
|
|
|
1472 }
|
|
|
1473 if(car(t2)!=POINTER) error(TYERR);
|
|
|
1474 e=binop(MUL,e1,list2(CONST,size(cadr(t2))),t1,INT);
|
|
|
1475 type=t2;
|
|
|
1476 return(list3(ADD,e,e2));
|
|
|
1477 }
|
|
|
1478 if(car(t1)!=POINTER||!integral(t2)) error(TYERR);
|
|
|
1479 e=binop(MUL,e2,list2(CONST,size(cadr(t1))),t2,INT);
|
|
|
1480 type=t1;
|
|
|
1481 if(car(e1)==ADDRESS&&car(e)==CONST)
|
|
|
1482 return(list2(ADDRESS,list2(car(cadr(e1)),
|
|
|
1483 cadr(cadr(e1))+cadr(e))));
|
|
|
1484 return(list3(ADD,e1,e));
|
|
|
1485 }
|
|
|
1486 if(op==SUB)
|
|
|
1487 { if(integral(t1))
|
|
|
1488 { if(!integral(t2)) error(TYERR);
|
|
|
1489 if(t1==INT) type=t2;else type=t1;
|
|
|
1490 return(list3(SUB,e1,e2));
|
|
|
1491 }
|
|
|
1492 if(car(t1)!=POINTER) error(TYERR);
|
|
|
1493 if(integral(t2))
|
|
|
1494 { e=binop(MUL,e2,list2(CONST,size(cadr(t1))),t2,INT);
|
|
|
1495 type=t1;
|
|
|
1496 return(list3(SUB,e1,e));
|
|
|
1497 }
|
|
|
1498 if(car(t2)!=POINTER)
|
|
|
1499 error(TYERR);
|
|
|
1500 compatible(t1,t2);
|
|
|
1501 e=list3(SUB,e1,e2);
|
|
|
1502 e=binop(DIV,e,list2(CONST,size(cadr(t1))),UNSIGNED,INT);
|
|
|
1503 type= INT;
|
|
|
1504 return e;
|
|
|
1505 }
|
|
|
1506 if(!integral(t1)||!integral(t2)) error(TYERR);
|
|
|
1507 if(t1==INT) type=t2;else type=t1;
|
|
|
1508 if((op==MUL||op==DIV)&&car(e2)==CONST&&cadr(e2)==1) return e1;
|
|
|
1509 if(op==BOR||op==EOR||op==BAND) return(list3(op,e1,e2));
|
|
|
1510 return(list3(type==UNSIGNED?op+US:op,e1,e2));
|
|
|
1511 }
|
|
|
1512 expr15(e1)
|
|
|
1513 int e1;
|
|
|
1514 {int t,args;
|
|
|
1515 t=type;
|
|
|
1516 if(integral(t)||car(t)!=FUNCTION)
|
|
|
1517 error(TYERR);
|
|
|
1518 t=cadr(t);
|
|
|
1519 getsym();
|
|
|
1520 args=0;
|
|
|
1521 while(sym!=RPAR)
|
|
|
1522 { args=list2(rvalue(expr1()),args);
|
|
|
1523 if(sym!=COMMA) break;
|
|
|
1524 getsym();
|
|
|
1525 }
|
|
|
1526 checksym(RPAR);
|
|
|
1527 if(t==CHAR) type= INT;else type=t;
|
|
|
1528 return list3(FUNCTION,e1,args);
|
|
|
1529 }
|
|
|
1530 typeid(s)
|
|
|
1531 int s;
|
|
|
1532 { return (integral(s) || s==SHORT || s==LONG || s==STRUCT || s==UNION ||
|
|
|
1533 (s==IDENT && nptr->sc==TYPE));
|
|
|
1534 }
|
|
|
1535 typename()
|
|
|
1536 {int t;
|
|
|
1537 type=t=typespec();
|
|
|
1538 ndecl0();
|
|
|
1539 reverse(t);
|
|
|
1540 return type;
|
|
|
1541 }
|
|
|
1542 ndecl0()
|
|
|
1543 { if(sym==MUL)
|
|
|
1544 { getsym();
|
|
|
1545 return type=list2(POINTER,ndecl0());
|
|
|
1546 }
|
|
|
1547 return ndecl1();
|
|
|
1548 }
|
|
|
1549 ndecl1()
|
|
|
1550 {int i,t;
|
|
|
1551 if(sym==LPAR)
|
|
|
1552 if(getsym()==RPAR) {type=list2(FUNCTION,type); getsym();}
|
|
|
1553 else
|
|
|
1554 { ndecl0();
|
|
|
1555 checksym(RPAR);
|
|
|
1556 }
|
|
|
1557 while(1)
|
|
|
1558 if(sym==LBRA)
|
|
|
1559 { getsym();
|
|
|
1560 t=type;
|
|
|
1561 i=cexpr(expr());
|
|
|
1562 checksym(RBRA);
|
|
|
1563 type=list3(ARRAY,t,i);
|
|
|
1564 }
|
|
|
1565 else if(sym==LPAR)
|
|
|
1566 { getsym();
|
|
|
1567 checksym(RPAR);
|
|
|
1568 type=list2(FUNCTION,type);
|
|
|
1569 }
|
|
|
1570 else return type;
|
|
|
1571 }
|
|
|
1572
|
|
|
1573 bexpr(e1,cond,l1)
|
|
|
1574 int e1,l1;
|
|
|
1575 char cond;
|
|
|
1576 {int e2,l2;
|
|
|
1577 if (chk) return;
|
|
|
1578 e2=cadr(e1);
|
|
|
1579 switch(car(e1))
|
|
|
1580 {case LNOT:
|
|
|
1581 bexpr(e2,!cond,l1);
|
|
|
1582 return;
|
|
|
1583 case GT:
|
|
|
1584 rexpr(e1,l1,cond?"GT":"LE");
|
|
|
1585 return;
|
|
|
1586 case UGT:
|
|
|
1587 rexpr(e1,l1,cond?"HI":"LS");
|
|
|
1588 return;
|
|
|
1589 case GE:
|
|
|
1590 rexpr(e1,l1,cond?"GE":"LT");
|
|
|
1591 return;
|
|
|
1592 case UGE:
|
|
|
1593 rexpr(e1,l1,cond?"HS":"LO");
|
|
|
1594 return;
|
|
|
1595 case LT:
|
|
|
1596 rexpr(e1,l1,cond?"LT":"GE");
|
|
|
1597 return;
|
|
|
1598 case ULT:
|
|
|
1599 rexpr(e1,l1,cond?"LO":"HS");
|
|
|
1600 return;
|
|
|
1601 case LE:
|
|
|
1602 rexpr(e1,l1,cond?"LE":"GT");
|
|
|
1603 return;
|
|
|
1604 case ULE:
|
|
|
1605 rexpr(e1,l1,cond?"LS":"HI");
|
|
|
1606 return;
|
|
|
1607 case EQ:
|
|
|
1608 rexpr(e1,l1,cond?"EQ":"NE");
|
|
|
1609 return;
|
|
|
1610 case NEQ:
|
|
|
1611 rexpr(e1,l1,cond?"NE":"EQ");
|
|
|
1612 return;
|
|
|
1613 case LAND:
|
|
|
1614 bexpr(e2,0,cond?(l2=fwdlabel()):l1);
|
|
|
1615 bexpr(caddr(e1),cond,l1);
|
|
|
1616 if(cond) fwddef(l2);
|
|
|
1617 return;
|
|
|
1618 case LOR:
|
|
|
1619 bexpr(e2,1,cond?l1:(l2=fwdlabel()));
|
|
|
1620 bexpr(caddr(e1),cond,l1);
|
|
|
1621 if(!cond) fwddef(l2);
|
|
|
1622 return;
|
|
|
1623 case CRGVAR:
|
|
|
1624 ldby(e2);
|
|
|
1625 jcond(l1,cond);
|
|
|
1626 return;
|
|
|
1627 case CRLVAR:
|
|
|
1628 ldbu(e2);
|
|
|
1629 jcond(l1,cond);
|
|
|
1630 return;
|
|
|
1631 case CONST:
|
|
|
1632 if(cond&&e2||!cond&&!e2) jmp(l1);
|
|
|
1633 return;
|
|
|
1634 case RGVAR:
|
|
|
1635 case RLVAR:
|
|
|
1636 case CRINDIRECT:
|
|
|
1637 gexpr(e1);
|
|
|
1638 jcond(l1,cond);
|
|
|
1639 return;
|
|
|
1640 default:gexpr(e1);
|
|
|
1641 subdim(0);
|
|
|
1642 jcond(l1,cond);
|
|
|
1643 return;
|
|
|
1644 }
|
|
|
1645 }
|
|
|
1646 rexpr(e1,l1,s)
|
|
|
1647 int e1,l1;
|
|
|
1648 char *s;
|
|
|
1649 { gexpr(list3(SUB,cadr(e1),caddr(e1)));
|
|
|
1650 printf("\tLB%s\t_%d\n",s,l1);
|
|
|
1651 }
|
|
|
1652 jcond(l,cond)
|
|
|
1653 int l;
|
|
|
1654 char cond;
|
|
|
1655 { printf("\tLB%s\t_%d\n",cond?"NE":"EQ",l);
|
|
|
1656 }
|
|
|
1657 jmp(l)
|
|
|
1658 int l;
|
|
|
1659 { control=0;
|
|
|
1660 printf("\tLBRA\t_%d\n",l);
|
|
|
1661 }
|
|
|
1662 fwdlabel()
|
|
|
1663 { return labelno++;
|
|
|
1664 }
|
|
|
1665 fwddef(l)
|
|
|
1666 int l;
|
|
|
1667 { control=1;
|
|
|
1668 printf("_%d\n",l);
|
|
|
1669 }
|
|
|
1670 backdef()
|
|
|
1671 { control=1;
|
|
|
1672 printf("_%d\n",labelno);
|
|
|
1673 return labelno++;
|
|
|
1674 }
|
|
|
1675
|
|
|
1676 gexpr(e1)
|
|
|
1677 int e1;
|
|
|
1678 {int e2,e3;
|
|
|
1679 if (chk) return;
|
|
|
1680 e2 = cadr(e1);
|
|
|
1681 switch (car(e1))
|
|
|
1682 {case GVAR:
|
|
|
1683 leaxy(e2);
|
|
|
1684 return;
|
|
|
1685 case RGVAR:
|
|
|
1686 lddy(e2);
|
|
|
1687 return;
|
|
|
1688 case CRGVAR:
|
|
|
1689 ldby(e2);
|
|
|
1690 sex();
|
|
|
1691 return;
|
|
|
1692 case LVAR:
|
|
|
1693 leaxu(e2);
|
|
|
1694 return;
|
|
|
1695 case RLVAR:
|
|
|
1696 lddu(e2);
|
|
|
1697 return;
|
|
|
1698 case CRLVAR:
|
|
|
1699 ldbu(e2);
|
|
|
1700 sex();
|
|
|
1701 return;
|
|
|
1702 case FNAME:
|
|
|
1703 leaxpcr((NMTBL *)e2);
|
|
|
1704 tfrxd();
|
|
|
1705 return;
|
|
|
1706 case CONST:
|
|
|
1707 if (e2) lddim(e2);
|
|
|
1708 else clrd();
|
|
|
1709 return;
|
|
|
1710 case STRING:
|
|
|
1711 string(e1);
|
|
|
1712 return;
|
|
|
1713 case FUNCTION:
|
|
|
1714 function(e1);
|
|
|
1715 return;
|
|
|
1716 case INDIRECT:
|
|
|
1717 indirect(e1);
|
|
|
1718 return;
|
|
|
1719 case RINDIRECT: case CRINDIRECT:
|
|
|
1720 rindirect(e1);
|
|
|
1721 return;
|
|
|
1722 case ADDRESS:
|
|
|
1723 gexpr(e2);
|
|
|
1724 tfrxd();
|
|
|
1725 return;
|
|
|
1726 case MINUS:
|
|
|
1727 gexpr(e2);
|
|
|
1728 printf("\tNEGA\n\tNEGB\n\tSBCA\t#0\n");
|
|
|
1729 return;
|
|
|
1730 case BNOT:
|
|
|
1731 gexpr(e2);
|
|
|
1732 printf("\tCOMA\n\tCOMB\n");
|
|
|
1733 return;
|
|
|
1734 case PREINC:
|
|
|
1735 switch (car(e2))
|
|
|
1736 {case GVAR: case LVAR:
|
|
|
1737 ldd(e2);
|
|
|
1738 adddim(caddr(e1));
|
|
|
1739 std(e2);
|
|
|
1740 return;
|
|
|
1741 default:
|
|
|
1742 gexpr(e2);
|
|
|
1743 lddx();
|
|
|
1744 adddim(caddr(e1));
|
|
|
1745 stdx();
|
|
|
1746 return;
|
|
|
1747 }
|
|
|
1748 case POSTINC:
|
|
|
1749 switch (car(e2))
|
|
|
1750 {case GVAR: case LVAR:
|
|
|
1751 ldd(e2);
|
|
|
1752 adddim(e3 = caddr(e1));
|
|
|
1753 std(e2);
|
|
|
1754 subdim(e3);
|
|
|
1755 return;
|
|
|
1756 default:
|
|
|
1757 gexpr(e2);
|
|
|
1758 lddx();
|
|
|
1759 adddim(e3=caddr(e1));
|
|
|
1760 stdx();
|
|
|
1761 subdim(e3);
|
|
|
1762 return;
|
|
|
1763 }
|
|
|
1764 case CPOSTINC:
|
|
|
1765 gexpr(e2);
|
|
|
1766 ldbx();
|
|
|
1767 incx();
|
|
|
1768 sex();
|
|
|
1769 return;
|
|
|
1770 case CPREINC:
|
|
|
1771 gexpr(e2);
|
|
|
1772 incx();
|
|
|
1773 ldbx();
|
|
|
1774 sex();
|
|
|
1775 return;
|
|
|
1776 case CPOSTDEC:
|
|
|
1777 gexpr(e2);
|
|
|
1778 ldbx();
|
|
|
1779 decx();
|
|
|
1780 sex();
|
|
|
1781 return;
|
|
|
1782 case CPREDEC:
|
|
|
1783 gexpr(e2);
|
|
|
1784 decx();
|
|
|
1785 ldbx();
|
|
|
1786 sex();
|
|
|
1787 return;
|
|
|
1788 case MUL: case UMUL:
|
|
|
1789 if (car(e3=caddr(e1)) == CONST)
|
|
|
1790 { if (0 < (e3 = cadr(e3)) && e3 <= 10)
|
|
|
1791 { gexpr(e2);
|
|
|
1792 switch (e3)
|
|
|
1793 {case 8:
|
|
|
1794 asld();
|
|
|
1795 case 4:
|
|
|
1796 asld();
|
|
|
1797 case 2:
|
|
|
1798 asld();
|
|
|
1799 case 1:
|
|
|
1800 return;
|
|
|
1801 case 10:
|
|
|
1802 asld();
|
|
|
1803 case 5:
|
|
|
1804 pushd();
|
|
|
1805 asld();
|
|
|
1806 asld();
|
|
|
1807 addds();
|
|
|
1808 return;
|
|
|
1809 case 6:
|
|
|
1810 asld();
|
|
|
1811 case 3:
|
|
|
1812 pushd();
|
|
|
1813 asld();
|
|
|
1814 addds();
|
|
|
1815 return;
|
|
|
1816 case 9: case 7:
|
|
|
1817 pushd();
|
|
|
1818 asld();
|
|
|
1819 asld();
|
|
|
1820 asld();
|
|
|
1821 if (e3 == 9) addds(); else subds();
|
|
|
1822 return;
|
|
|
1823 }
|
|
|
1824 }
|
|
|
1825 }
|
|
|
1826 case DIV: case UDIV: case MOD: case UMOD:
|
|
|
1827 case LSHIFT: case ULSHIFT: case RSHIFT: case URSHIFT:
|
|
|
1828 binexpr(e1);
|
|
|
1829 return;
|
|
|
1830 case ADD: case SUB: case BAND: case EOR: case BOR:
|
|
|
1831 machinop(e1);
|
|
|
1832 return;
|
|
|
1833 case COND:
|
|
|
1834 e2=fwdlabel();
|
|
|
1835 bexpr(cadr(e1),0,e2);
|
|
|
1836 gexpr(caddr(e1));
|
|
|
1837 jmp(e3=fwdlabel());
|
|
|
1838 fwddef(e2);
|
|
|
1839 gexpr(cadddr(e1));
|
|
|
1840 fwddef(e3);
|
|
|
1841 return;
|
|
|
1842 case ASS: case CASS:
|
|
|
1843 assign(e1);
|
|
|
1844 return;
|
|
|
1845 case ASSOP: case CASSOP:
|
|
|
1846 assop(e1);
|
|
|
1847 return;
|
|
|
1848 case COMMA:
|
|
|
1849 gexpr(e2);
|
|
|
1850 gexpr(caddr(e1));
|
|
|
1851 return;
|
|
|
1852 default:
|
|
|
1853 bexpr(e1,1,e2=fwdlabel());
|
|
|
1854 clrd();
|
|
|
1855 printf("\tBRA\t*+5\n");
|
|
|
1856 fwddef(e2);
|
|
|
1857 lddim(1);
|
|
|
1858 }
|
|
|
1859 }
|
|
|
1860 string(e1)
|
|
|
1861 int e1;
|
|
|
1862 {char *s;
|
|
|
1863 int i,l,lb;
|
|
|
1864 s=(char *)cadr(e1);
|
|
|
1865 lb=fwdlabel();
|
|
|
1866 if ((l = caddr(e1)) < 128)
|
|
|
1867 printf("\tLEAX\t2,PC\n\tBRA\t_%d\n",lb);
|
|
|
1868 else
|
|
|
1869 printf("\tLEAX\t3,PC\n\tLBRA\t_%d\n",lb);
|
|
|
1870 do
|
|
|
1871 { printf("\tFCB\t%d",*s++);
|
|
|
1872 for (i=8; --l && --i;) printf(",%d",*s++);
|
|
|
1873 printf("\n");
|
|
|
1874 }
|
|
|
1875 while (l);
|
|
|
1876 fwddef(lb);
|
|
|
1877 }
|
|
|
1878 function(e1)
|
|
|
1879 int e1;
|
|
|
1880 {int e2,e3,e4,e5,nargs;
|
|
|
1881 NMTBL *n;
|
|
|
1882 e2 = cadr(e1);
|
|
|
1883 nargs = 0;
|
|
|
1884 for (e3 = caddr(e1); e3; e3 = cadr(e3))
|
|
|
1885 { n=(NMTBL *)(e5=(cadr(e4 = car(e3))));
|
|
|
1886 switch(car(e4))
|
|
|
1887 {case FNAME:
|
|
|
1888 leaxpcr(n);
|
|
|
1889 pushx();
|
|
|
1890 break;
|
|
|
1891 case ADDRESS:
|
|
|
1892 gexpr(e5);
|
|
|
1893 pushx();
|
|
|
1894 break;
|
|
|
1895 default:gexpr(e4);
|
|
|
1896 pushd();
|
|
|
1897 }
|
|
|
1898 ++nargs;
|
|
|
1899 }
|
|
|
1900 if (car(e2) == FNAME)
|
|
|
1901 { n=(NMTBL *)cadr(e2);
|
|
|
1902 printf("\tLBSR\t%s\n",n->nm);
|
|
|
1903 }
|
|
|
1904 else
|
|
|
1905 { gexpr(e2);
|
|
|
1906 printf("\tJSR\t,X\n");
|
|
|
1907 }
|
|
|
1908 if (nargs) printf("\tLEAS\t%d,S\n",2*nargs);
|
|
|
1909 }
|
|
|
1910 indirect(e1)
|
|
|
1911 int e1;
|
|
|
1912 {int e2,e3,e4;
|
|
|
1913 e3 = cadr(e2 = cadr(e1));
|
|
|
1914 switch(car(e2))
|
|
|
1915 {case RGVAR: case RLVAR:
|
|
|
1916 ldx(e2);
|
|
|
1917 return;
|
|
|
1918 case ADD:
|
|
|
1919 if(car(e3)==ADDRESS)
|
|
|
1920 { gexpr(caddr(e2));
|
|
|
1921 gexpr(cadr(e3));
|
|
|
1922 opdx("LEAX");
|
|
|
1923 return;
|
|
|
1924 }
|
|
|
1925 switch(car(e4 = caddr(e2)))
|
|
|
1926 {case RGVAR: case RLVAR:
|
|
|
1927 gexpr(e3);
|
|
|
1928 ldx(e4);
|
|
|
1929 opdx("LEAX");
|
|
|
1930 return;
|
|
|
1931 }
|
|
|
1932 default:
|
|
|
1933 gexpr(e2);
|
|
|
1934 tfrdx();
|
|
|
1935 }
|
|
|
1936 }
|
|
|
1937
|
|
|
1938 machinop(e1)
|
|
|
1939 int e1;
|
|
|
1940 {int e2,e3;
|
|
|
1941 e2 = cadr(e1);
|
|
|
1942 switch (car(e3 = caddr(e1)))
|
|
|
1943 {case RGVAR: case RLVAR: case CONST:
|
|
|
1944 gexpr(e2);
|
|
|
1945 oprt(car(e1),e3);
|
|
|
1946 return;
|
|
|
1947 default:
|
|
|
1948 gexpr(e3);
|
|
|
1949 pushd();
|
|
|
1950 gexpr(e2);
|
|
|
1951 tosop(car(e1));
|
|
|
1952 return;
|
|
|
1953 }
|
|
|
1954 }
|
|
|
1955
|
|
|
1956 rindirect(e1)
|
|
|
1957 int e1;
|
|
|
1958 {char *op;
|
|
|
1959 int e2,e3,e4,byte,l;
|
|
|
1960 op = ((byte = (car(e1) == CRINDIRECT)) ? "LDB" : "LDD");
|
|
|
1961 e3 = cadr(e2 = cadr(e1));
|
|
|
1962 switch (car(e2))
|
|
|
1963 {case RGVAR: case RLVAR:
|
|
|
1964 indir(op,e2);
|
|
|
1965 sextend(byte);
|
|
|
1966 return;
|
|
|
1967 case ADD:
|
|
|
1968 if(car(e3)==ADDRESS)
|
|
|
1969 { gexpr(caddr(e2));
|
|
|
1970 gexpr(cadr(e3));
|
|
|
1971 opdx(op);
|
|
|
1972 sextend(byte);
|
|
|
1973 return;
|
|
|
1974 }
|
|
|
1975 switch(car(e4=caddr(e2)))
|
|
|
1976 {case RGVAR: case RLVAR:
|
|
|
1977 gexpr(e3);
|
|
|
1978 ldx(e4);
|
|
|
1979 opdx(op);
|
|
|
1980 sextend(byte);
|
|
|
1981 return;
|
|
|
1982 case CONST:
|
|
|
1983 switch (car(e3))
|
|
|
1984 {case RGVAR: case RLVAR:
|
|
|
1985 ldx(e3);
|
|
|
1986 indexx(op,cadr(e4));
|
|
|
1987 sextend(byte);
|
|
|
1988 return;
|
|
|
1989 }
|
|
|
1990 default:
|
|
|
1991 gexpr(e3);
|
|
|
1992 pushd();
|
|
|
1993 gexpr(e4);
|
|
|
1994 pulx();
|
|
|
1995 opdx(op);
|
|
|
1996 sextend(byte);
|
|
|
1997 return;
|
|
|
1998 }
|
|
|
1999 case PREINC:
|
|
|
2000 if ((l = caddr(e2)) == -1 || l == -2)
|
|
|
2001 switch (car(e3))
|
|
|
2002 {case GVAR: case LVAR:
|
|
|
2003 ldx(e3);
|
|
|
2004 predecx(op,l);
|
|
|
2005 stx(e3);
|
|
|
2006 sextend(byte);
|
|
|
2007 return;
|
|
|
2008 }
|
|
|
2009 break;
|
|
|
2010 case POSTINC:
|
|
|
2011 if ((l = caddr(e2)) == 1 || l == 2)
|
|
|
2012 switch (car(e3))
|
|
|
2013 {case GVAR: case LVAR:
|
|
|
2014 ldx(e3);
|
|
|
2015 postincx(op,l);
|
|
|
2016 stx(e3);
|
|
|
2017 sextend(byte);
|
|
|
2018 return;
|
|
|
2019 }
|
|
|
2020 break;
|
|
|
2021 }
|
|
|
2022 gexpr(e2);
|
|
|
2023 tfrdx();
|
|
|
2024 indexx(op,0);
|
|
|
2025 sextend(byte);
|
|
|
2026 }
|
|
|
2027 assign(e1)
|
|
|
2028 int e1;
|
|
|
2029 {char *op;
|
|
|
2030 int e2,e3,e4,e5,l;
|
|
|
2031 op = (car(e1) == CASS ? "STB" : "STD");
|
|
|
2032 e3 = cadr(e2 = cadr(e1));
|
|
|
2033 e4 = caddr(e1);
|
|
|
2034 switch(car(e2))
|
|
|
2035 {case GVAR: case LVAR:
|
|
|
2036 gexpr(e4);
|
|
|
2037 index(op,e2);
|
|
|
2038 return;
|
|
|
2039 case INDIRECT:
|
|
|
2040 switch(car(e3))
|
|
|
2041 {case RGVAR: case RLVAR:
|
|
|
2042 gexpr(e4);
|
|
|
2043 indir(op,e3);
|
|
|
2044 return;
|
|
|
2045 case ADD:
|
|
|
2046 if (car(caddr(e3)) == CONST)
|
|
|
2047 switch (car(e5=cadr(e3)))
|
|
|
2048 {case RGVAR: case RLVAR:
|
|
|
2049 gexpr(e4);
|
|
|
2050 ldx(e5);
|
|
|
2051 indexx(op,cadr(caddr(e3)));
|
|
|
2052 return;
|
|
|
2053 }
|
|
|
2054 break;
|
|
|
2055 case PREINC:
|
|
|
2056 if ((l = caddr(e3)) == -1 || l == -2)
|
|
|
2057 switch (car(e5=cadr(e3)))
|
|
|
2058 {case GVAR: case LVAR:
|
|
|
2059 gexpr(e4);
|
|
|
2060 ldx(e5);
|
|
|
2061 predecx(op,l);
|
|
|
2062 stx(e5);
|
|
|
2063 return;
|
|
|
2064 }
|
|
|
2065 break;
|
|
|
2066 case POSTINC:
|
|
|
2067 if ((l = caddr(e3)) == 1 || l == 2)
|
|
|
2068 switch (car(e5=cadr(e3)))
|
|
|
2069 {case GVAR: case LVAR:
|
|
|
2070 gexpr(e4);
|
|
|
2071 ldx(e5);
|
|
|
2072 postincx(op,l);
|
|
|
2073 stx(e5);
|
|
|
2074 return;
|
|
|
2075 }
|
|
|
2076 break;
|
|
|
2077 }
|
|
|
2078 }
|
|
|
2079 switch (car(e4))
|
|
|
2080 {case RGVAR: case CRGVAR: case RLVAR: case CRLVAR: case CONST:
|
|
|
2081 gexpr(e2);
|
|
|
2082 gexpr(e4);
|
|
|
2083 break;
|
|
|
2084 default:
|
|
|
2085 gexpr(e4);
|
|
|
2086 pushd();
|
|
|
2087 gexpr(e2);
|
|
|
2088 pulld();
|
|
|
2089 }
|
|
|
2090 indexx(op,0);
|
|
|
2091 return;
|
|
|
2092 }
|
|
|
2093 assop(e1)
|
|
|
2094 int e1;
|
|
|
2095 {int e2,e3,byte,op;
|
|
|
2096 char *ldop,*stop;
|
|
|
2097 ldop = ((byte = (car(e1) == CASSOP)) ? "LDB" : "LDD");
|
|
|
2098 stop = (byte ? "STB" : "STD");
|
|
|
2099 e2 = cadr(e1);
|
|
|
2100 e3 = caddr(e1);
|
|
|
2101 op = cadddr(e1);
|
|
|
2102 switch (car(e2))
|
|
|
2103 {case GVAR: case LVAR:
|
|
|
2104 switch (car(e3))
|
|
|
2105 {case RGVAR: case RLVAR: case CONST:
|
|
|
2106 if (simpop(op))
|
|
|
2107 { index(ldop,e2);
|
|
|
2108 sextend(byte);
|
|
|
2109 oprt(op,e3);
|
|
|
2110 index(stop,e2);
|
|
|
2111 return;
|
|
|
2112 }
|
|
|
2113 default:
|
|
|
2114 gexpr(e3);
|
|
|
2115 pushd();
|
|
|
2116 index(ldop,e2);
|
|
|
2117 sextend(byte);
|
|
|
2118 tosop(op);
|
|
|
2119 index(stop,e2);
|
|
|
2120 return;
|
|
|
2121 }
|
|
|
2122 default:
|
|
|
2123 switch (car(e3))
|
|
|
2124 {case RGVAR: case RLVAR: case CONST:
|
|
|
2125 if (simpop(op))
|
|
|
2126 { gexpr(e2);
|
|
|
2127 indexx(ldop,0);
|
|
|
2128 sextend(byte);
|
|
|
2129 oprt(op,e3);
|
|
|
2130 indexx(stop,0);
|
|
|
2131 return;
|
|
|
2132 }
|
|
|
2133 default:
|
|
|
2134 gexpr(e3);
|
|
|
2135 pushd();
|
|
|
2136 gexpr(e2);
|
|
|
2137 indexx(ldop,0);
|
|
|
2138 sextend(byte);
|
|
|
2139 tosop(op);
|
|
|
2140 indexx(stop,0);
|
|
|
2141 return;
|
|
|
2142 }
|
|
|
2143 }
|
|
|
2144 }
|
|
|
2145 simpop(op)
|
|
|
2146 int op;
|
|
|
2147 { return (op == ADD || op == SUB ||
|
|
|
2148 op == BAND || op == EOR || op == BOR);
|
|
|
2149 }
|
|
|
2150 oprt(op,e1)
|
|
|
2151 int op,e1;
|
|
|
2152 {int e2;
|
|
|
2153 e2 = cadr(e1);
|
|
|
2154 switch (car(e1))
|
|
|
2155 {case RGVAR:
|
|
|
2156 oprt1(op,"Y",e2);
|
|
|
2157 return;
|
|
|
2158 case RLVAR:
|
|
|
2159 oprt1(op,"U",e2);
|
|
|
2160 return;
|
|
|
2161 case CONST:
|
|
|
2162 oprtc(op,e2);
|
|
|
2163 return;
|
|
|
2164 }
|
|
|
2165 }
|
|
|
2166 oprt1(op,index,n)
|
|
|
2167 int op,n;
|
|
|
2168 char *index;
|
|
|
2169 { switch (op)
|
|
|
2170 {case ADD:
|
|
|
2171 printf("\tADDD\t%d,%s\n",n,index);
|
|
|
2172 return;
|
|
|
2173 case SUB:
|
|
|
2174 printf("\tSUBD\t%d,%s\n",n,index);
|
|
|
2175 return;
|
|
|
2176 case BAND: case EOR: case BOR:
|
|
|
2177 dualop(op,index,n);
|
|
|
2178 return;
|
|
|
2179 }
|
|
|
2180 }
|
|
|
2181 dualop(op,index,n)
|
|
|
2182 int op;
|
|
|
2183 char *index;
|
|
|
2184 int n;
|
|
|
2185 {char *ops;
|
|
|
2186 ops = ((op == BAND) ? "AND" :
|
|
|
2187 (op == EOR) ? "EOR" :
|
|
|
2188 (op == BOR) ? "OR" : (char *)DEBUG);
|
|
|
2189 printf("\t%sA\t%d,%s\n\t%sB\t%d+1,%s\n",ops,n,index,ops,n,index);
|
|
|
2190 }
|
|
|
2191
|
|
|
2192 oprtc(op,n)
|
|
|
2193 int op,n;
|
|
|
2194 { switch (op)
|
|
|
2195 {case ADD:
|
|
|
2196 adddim(n);
|
|
|
2197 return;
|
|
|
2198 case SUB:
|
|
|
2199 subdim(n);
|
|
|
2200 return;
|
|
|
2201 case BAND: case EOR: case BOR:
|
|
|
2202 dualc(op,n);
|
|
|
2203 return;
|
|
|
2204 }
|
|
|
2205 }
|
|
|
2206 dualc(op,n)
|
|
|
2207 int op;
|
|
|
2208 int n;
|
|
|
2209 {char *ops;
|
|
|
2210 ops = ((op == BAND) ? "AND" :
|
|
|
2211 (op == EOR) ? "EOR" :
|
|
|
2212 (op == BOR) ? "OR" : (char *)DEBUG);
|
|
|
2213 printf("\t%sA\t#%d\n\t%sB\t#%d\n",ops,(n >> 8) & 0xff,ops,n & 0xff);
|
|
|
2214 }
|
|
|
2215 tosop(op)
|
|
|
2216 int op;
|
|
|
2217 { switch (op)
|
|
|
2218 {case ADD:
|
|
|
2219 addds();
|
|
|
2220 return;
|
|
|
2221 case SUB:
|
|
|
2222 subds();
|
|
|
2223 return;
|
|
|
2224 case BAND: case EOR: case BOR:
|
|
|
2225 dualtosop(op);
|
|
|
2226 return;
|
|
|
2227 default:
|
|
|
2228 pulx();
|
|
|
2229 library(op);
|
|
|
2230 }
|
|
|
2231 }
|
|
|
2232 dualtosop(op)
|
|
|
2233 int op;
|
|
|
2234 {char *ops;
|
|
|
2235 ops = ((op == BAND) ? "AND" :
|
|
|
2236 (op == EOR) ? "EOR" :
|
|
|
2237 (op == BOR) ? "OR" : (char *)DEBUG);
|
|
|
2238 printf("\t%sA\t,S+\n\t%sB\t,S+\n",ops,ops);
|
|
|
2239 }
|
|
|
2240 pushd()
|
|
|
2241 { printf("\tPSHS\tD\n");
|
|
|
2242 }
|
|
|
2243 pushx()
|
|
|
2244 { printf("\tPSHS\tX\n");
|
|
|
2245 }
|
|
|
2246 pulld()
|
|
|
2247 { printf("\tPULS\tD\n");
|
|
|
2248 }
|
|
|
2249 pulx()
|
|
|
2250 { printf("\tPULS\tX\n");
|
|
|
2251 }
|
|
|
2252 tfrdx()
|
|
|
2253 { printf("\tTFR\tD,X\n");
|
|
|
2254 }
|
|
|
2255 tfrxd()
|
|
|
2256 { printf("\tTFR\tX,D\n");
|
|
|
2257 }
|
|
|
2258 /*
|
|
|
2259 exgdx()
|
|
|
2260 { printf("\tEXG\tD,X\n");
|
|
|
2261 }
|
|
|
2262 */
|
|
|
2263 asld()
|
|
|
2264 { printf("\tASLB\n\tROLA\n");
|
|
|
2265 }
|
|
|
2266 adddim(n)
|
|
|
2267 { printf("\tADDD\t#%d\n",n);
|
|
|
2268 }
|
|
|
2269 subdim(n)
|
|
|
2270 { printf("\tSUBD\t#%d\n",n);
|
|
|
2271 }
|
|
|
2272 cmpdimm(n)
|
|
|
2273 int n;
|
|
|
2274 { printf("\tCMPD\t#%d\n",n);
|
|
|
2275 }
|
|
|
2276 addds()
|
|
|
2277 { printf("\tADDD\t,S++\n");
|
|
|
2278 }
|
|
|
2279 subds()
|
|
|
2280 { printf("\tSUBD\t,S++\n");
|
|
|
2281 }
|
|
|
2282 clrd()
|
|
|
2283 { printf("\tCLRA\n\tCLRB\n");
|
|
|
2284 }
|
|
|
2285 lddim(n)
|
|
|
2286 int n;
|
|
|
2287 { printf("\tLDD\t#%d\n",n);
|
|
|
2288 }
|
|
|
2289
|
|
|
2290 ldd(e)
|
|
|
2291 int e;
|
|
|
2292 { switch (car(e))
|
|
|
2293 {case GVAR:
|
|
|
2294 lddy(cadr(e));
|
|
|
2295 return;
|
|
|
2296 case LVAR:
|
|
|
2297 lddu(cadr(e));
|
|
|
2298 return;
|
|
|
2299 default:
|
|
|
2300 DEBUG;
|
|
|
2301 }
|
|
|
2302 }
|
|
|
2303
|
|
|
2304 lddx()
|
|
|
2305 { printf("\tLDD\t,X\n");
|
|
|
2306 }
|
|
|
2307 lddy(n)
|
|
|
2308 int n;
|
|
|
2309 { printf("\tLDD\t%d,Y\n",n);
|
|
|
2310 }
|
|
|
2311 lddu(n)
|
|
|
2312 int n;
|
|
|
2313 { printf("\tLDD\t%d,U\n",n);
|
|
|
2314 }
|
|
|
2315
|
|
|
2316 std(e)
|
|
|
2317 int e;
|
|
|
2318 { switch (car(e))
|
|
|
2319 {case GVAR:
|
|
|
2320 stdy(cadr(e));
|
|
|
2321 return;
|
|
|
2322 case LVAR:
|
|
|
2323 stdu(cadr(e));
|
|
|
2324 return;
|
|
|
2325 default:
|
|
|
2326 DEBUG;
|
|
|
2327 }
|
|
|
2328 }
|
|
|
2329 stdx()
|
|
|
2330 { printf("\tSTD\t,X\n");
|
|
|
2331 }
|
|
|
2332 stdy(n)
|
|
|
2333 int n;
|
|
|
2334 { printf("\tSTD\t%d,Y\n",n);
|
|
|
2335 }
|
|
|
2336 stdu(n)
|
|
|
2337 int n;
|
|
|
2338 { printf("\tSTD\t%d,U\n",n);
|
|
|
2339 }
|
|
|
2340
|
|
|
2341 ldbx()
|
|
|
2342 { printf("\tLDB\t,X\n");
|
|
|
2343 }
|
|
|
2344 /*
|
|
|
2345 stbx()
|
|
|
2346 { printf("\tSTB\t,X\n");
|
|
|
2347 }
|
|
|
2348 */
|
|
|
2349 ldby(n)
|
|
|
2350 int n;
|
|
|
2351 { printf("\tLDB\t%d,Y\n",n);
|
|
|
2352 }
|
|
|
2353 ldbu(n)
|
|
|
2354 int n;
|
|
|
2355 { printf("\tLDB\t%d,U\n",n);
|
|
|
2356 }
|
|
|
2357 predecx(op,l)
|
|
|
2358 char *op;
|
|
|
2359 int l;
|
|
|
2360 { printf("\t%s\t,%sX\n",op,(l == -1 ? "-" : "--"));
|
|
|
2361 }
|
|
|
2362 postincx(op,l)
|
|
|
2363 char *op;
|
|
|
2364 int l;
|
|
|
2365 { printf("\t%s\t,X%s\n",op,(l == 1 ? "+" : "++"));
|
|
|
2366 }
|
|
|
2367 leaxy(n)
|
|
|
2368 int n;
|
|
|
2369 { printf("\tLEAX\t%d,Y\n",n);
|
|
|
2370 }
|
|
|
2371 leaxu(n)
|
|
|
2372 int n;
|
|
|
2373 { printf("\tLEAX\t%d,U\n",n);
|
|
|
2374 }
|
|
|
2375 leaxpcr(n)
|
|
|
2376 NMTBL *n;
|
|
|
2377 { printf("\tLEAX\t%s,PCR\n",n->nm);
|
|
|
2378 }
|
|
|
2379
|
|
|
2380 ldx(e)
|
|
|
2381 int e;
|
|
|
2382 { switch (car(e))
|
|
|
2383 {case GVAR: case RGVAR:
|
|
|
2384 ldxy(cadr(e));
|
|
|
2385 return;
|
|
|
2386 case LVAR: case RLVAR:
|
|
|
2387 ldxu(cadr(e));
|
|
|
2388 return;
|
|
|
2389 default:
|
|
|
2390 DEBUG;
|
|
|
2391 }
|
|
|
2392 }
|
|
|
2393
|
|
|
2394 ldxy(n)
|
|
|
2395 int n;
|
|
|
2396 { printf("\tLDX\t%d,Y\n",n);
|
|
|
2397 }
|
|
|
2398 ldxu(n)
|
|
|
2399 int n;
|
|
|
2400 { printf("\tLDX\t%d,U\n",n);
|
|
|
2401 }
|
|
|
2402 /*
|
|
|
2403 ldxi(n)
|
|
|
2404 int n;
|
|
|
2405 { printf("\tLDX\t#%d\n",n);
|
|
|
2406 }
|
|
|
2407 */
|
|
|
2408 stx(e)
|
|
|
2409 int e;
|
|
|
2410 { switch (car(e))
|
|
|
2411 {case GVAR:
|
|
|
2412 stxy(cadr(e));
|
|
|
2413 return;
|
|
|
2414 case LVAR:
|
|
|
2415 stxu(cadr(e));
|
|
|
2416 return;
|
|
|
2417 default:
|
|
|
2418 DEBUG;
|
|
|
2419 }
|
|
|
2420 }
|
|
|
2421
|
|
|
2422 stxy(n)
|
|
|
2423 int n;
|
|
|
2424 { printf("\tSTX\t%d,Y\n",n);
|
|
|
2425 }
|
|
|
2426 stxu(n)
|
|
|
2427 int n;
|
|
|
2428 { printf("\tSTX\t%d,U\n",n);
|
|
|
2429 }
|
|
|
2430
|
|
|
2431 sex()
|
|
|
2432 { printf("\tSEX\n");
|
|
|
2433 }
|
|
|
2434 incx()
|
|
|
2435 { printf("\tINC\t,X\n");
|
|
|
2436 }
|
|
|
2437 decx()
|
|
|
2438 { printf("\tDEC\t,X\n");
|
|
|
2439 }
|
|
|
2440 opdx(op)
|
|
|
2441 char *op;
|
|
|
2442 { printf("\t%s\tD,X\n",op);
|
|
|
2443 }
|
|
|
2444 indexx(op,n)
|
|
|
2445 char *op;
|
|
|
2446 int n;
|
|
|
2447 { printf("\t%s\t%d,X\n",op,n);
|
|
|
2448 }
|
|
|
2449
|
|
|
2450 index(op,e)
|
|
|
2451 char *op;
|
|
|
2452 int e;
|
|
|
2453 { switch (car(e))
|
|
|
2454 {case GVAR:
|
|
|
2455 indexy(op,cadr(e));
|
|
|
2456 return;
|
|
|
2457 case LVAR:
|
|
|
2458 indexu(op,cadr(e));
|
|
|
2459 return;
|
|
|
2460 default:
|
|
|
2461 DEBUG;
|
|
|
2462 }
|
|
|
2463 }
|
|
|
2464
|
|
|
2465 indexy(op,n)
|
|
|
2466 char *op;
|
|
|
2467 int n;
|
|
|
2468 { printf("\t%s\t%d,Y\n",op,n);
|
|
|
2469 }
|
|
|
2470 indexu(op,n)
|
|
|
2471 char *op;
|
|
|
2472 int n;
|
|
|
2473 { printf("\t%s\t%d,U\n",op,n);
|
|
|
2474 }
|
|
|
2475
|
|
|
2476
|
|
|
2477 indir(op,e)
|
|
|
2478 char *op;
|
|
|
2479 int e;
|
|
|
2480 { switch (car(e))
|
|
|
2481 {case RGVAR:
|
|
|
2482 indiry(op,cadr(e));
|
|
|
2483 return;
|
|
|
2484 case RLVAR:
|
|
|
2485 indiru(op,cadr(e));
|
|
|
2486 return;
|
|
|
2487 default:
|
|
|
2488 DEBUG;
|
|
|
2489 }
|
|
|
2490 }
|
|
|
2491
|
|
|
2492 indiry(op,n)
|
|
|
2493 char *op;
|
|
|
2494 int n;
|
|
|
2495 { printf("\t%s\t[%d,Y]\n",op,n);
|
|
|
2496 }
|
|
|
2497 indiru(op,n)
|
|
|
2498 char *op;
|
|
|
2499 int n;
|
|
|
2500 { printf("\t%s\t[%d,U]\n",op,n);
|
|
|
2501 }
|
|
|
2502 sextend(byte)
|
|
|
2503 int byte;
|
|
|
2504 { if (byte) sex();
|
|
|
2505 }
|
|
|
2506 binexpr(e1)
|
|
|
2507 int e1;
|
|
|
2508 { gexpr(caddr(e1));
|
|
|
2509 pushd();
|
|
|
2510 gexpr(cadr(e1));
|
|
|
2511 pulx();
|
|
|
2512 library(car(e1));
|
|
|
2513 }
|
|
|
2514 library(op)
|
|
|
2515 int op;
|
|
|
2516 { printf("\tLBSR\t_0000%d\n",
|
|
|
2517 ((op == MUL || op == UMUL) ? 1 :
|
|
|
2518 (op == DIV) ? 2 :
|
|
|
2519 (op == UDIV) ? 3 :
|
|
|
2520 (op == MOD) ? 4 :
|
|
|
2521 (op == UMOD) ? 5 :
|
|
|
2522 (op == LSHIFT) ? 6 :
|
|
|
2523 (op == ULSHIFT) ? 7 :
|
|
|
2524 (op == RSHIFT) ? 8 :
|
|
|
2525 (op == URSHIFT) ? 9 : DEBUG));
|
|
|
2526 }
|
|
|
2527 cexpr(e)
|
|
|
2528 int e;
|
|
|
2529 { if (car(e) != CONST) error(CNERR);
|
|
|
2530 return (cadr(e));
|
|
|
2531 }
|
|
|
2532
|
|
|
2533 getsym()
|
|
|
2534 {NMTBL *nptr0,*nptr1;
|
|
|
2535 int i;
|
|
|
2536 char c;
|
|
|
2537 if (alpha(skipspc()))
|
|
|
2538 { i = hash = 0;
|
|
|
2539 while (alpha(ch) || digit(ch))
|
|
|
2540 { if (i <= 7) hash=7*(hash+(name[i++]=ch));
|
|
|
2541 getch();
|
|
|
2542 }
|
|
|
2543 name[i] = '\0';
|
|
|
2544 nptr0 = gsearch();
|
|
|
2545 if (nptr0->sc == RESERVE) return sym = nptr0->dsp;
|
|
|
2546 if (nptr0->sc == MACRO && !mflag)
|
|
|
2547 { mflag++;
|
|
|
2548 chsave = ch;
|
|
|
2549 chptrsave = chptr;
|
|
|
2550 chptr = (char *)nptr0->dsp;
|
|
|
2551 getch();
|
|
|
2552 return getsym();
|
|
|
2553 }
|
|
|
2554 sym = IDENT;
|
|
|
2555 gnptr=nptr=nptr0;
|
|
|
2556 if (mode==GDECL || mode==GSDECL || mode==GUDECL ||
|
|
|
2557 mode==GTDECL || mode==TOP)
|
|
|
2558 return sym;
|
|
|
2559 nptr1=lsearch();
|
|
|
2560 if (mode==STAT)
|
|
|
2561 if (nptr1->sc == EMPTY) return sym;
|
|
|
2562 else { nptr=nptr1; return sym;}
|
|
|
2563 nptr=nptr1;
|
|
|
2564 return sym;
|
|
|
2565 }
|
|
|
2566 else if (digit(ch))
|
|
|
2567 { symval=0;
|
|
|
2568 if (ch == '0')
|
|
|
2569 { if (getch() == 'x' || ch == 'X')
|
|
|
2570 while(1)
|
|
|
2571 if(digit(getch()))
|
|
|
2572 symval=symval*16+ch-'0';
|
|
|
2573 else if('a'<=ch&&ch<='f')
|
|
|
2574 symval=symval*16+ch-'a'+10;
|
|
|
2575 else if('A'<=ch&&ch<='F')
|
|
|
2576 symval=symval*16+ch-'A'+10;
|
|
|
2577 else break;
|
|
|
2578 else while (digit(ch)) {symval=symval*8+ch-'0';getch();}
|
|
|
2579 }
|
|
|
2580 else while(digit(ch)) {symval=symval*10+ch-'0';getch();}
|
|
|
2581 return sym=CONST;
|
|
|
2582 }
|
|
|
2583 else if(ch=='\'')
|
|
|
2584 { getch();
|
|
|
2585 symval=escape();
|
|
|
2586 if(ch!='\'') error(CHERR);
|
|
|
2587 getch();
|
|
|
2588 return sym=CONST;
|
|
|
2589 }
|
|
|
2590 else if(ch=='"')
|
|
|
2591 { getstring();
|
|
|
2592 return sym= STRING;
|
|
|
2593 }
|
|
|
2594 c=ch;
|
|
|
2595 getch();
|
|
|
2596 switch(c)
|
|
|
2597 {case '*':
|
|
|
2598 return postequ(MUL,MUL+AS);
|
|
|
2599 case '&':
|
|
|
2600 if(ch=='&') {getch();return sym=LAND;}
|
|
|
2601 return postequ(BAND,BAND+AS);
|
|
|
2602 case '-':
|
|
|
2603 if(ch=='>') {getch();return sym=ARROW;}
|
|
|
2604 if(ch=='-') {getch();return sym=DEC;}
|
|
|
2605 return postequ(SUB,SUB+AS);
|
|
|
2606 case '!':
|
|
|
2607 return postequ(LNOT,NEQ);
|
|
|
2608 case '~':
|
|
|
2609 return sym=BNOT;
|
|
|
2610 case '+':
|
|
|
2611 if(ch=='+') {getch();return sym=INC;}
|
|
|
2612 return postequ(ADD,ADD+AS);
|
|
|
2613 case '%':
|
|
|
2614 return postequ(MOD,MOD+AS);
|
|
|
2615 case '^':
|
|
|
2616 return postequ(EOR,EOR+AS);
|
|
|
2617 case '|':
|
|
|
2618 if(ch=='|') {getch();return sym=LOR;}
|
|
|
2619 return postequ(BOR,BOR+AS);
|
|
|
2620 case '=':
|
|
|
2621 return postequ(ASS,EQ);
|
|
|
2622 case '>':
|
|
|
2623 if(ch=='>') {getch();return postequ(RSHIFT,RSHIFT+AS);}
|
|
|
2624 return postequ(GT,GE);
|
|
|
2625 case '<':
|
|
|
2626 if(ch=='<') {getch();return postequ(LSHIFT,LSHIFT+AS);}
|
|
|
2627 return postequ(LT,LE);
|
|
|
2628 case '(':
|
|
|
2629 return sym=LPAR;
|
|
|
2630 case ')':
|
|
|
2631 return sym=RPAR;
|
|
|
2632 case '[':
|
|
|
2633 return sym=LBRA;
|
|
|
2634 case ']':
|
|
|
2635 return sym=RBRA;
|
|
|
2636 case '{':
|
|
|
2637 return sym=LC;
|
|
|
2638 case '}':
|
|
|
2639 return sym=RC;
|
|
|
2640 case ',':
|
|
|
2641 return sym=COMMA;
|
|
|
2642 case ';':
|
|
|
2643 return sym=SM;
|
|
|
2644 case ':':
|
|
|
2645 return sym=COLON;
|
|
|
2646 case '?':
|
|
|
2647 return sym=COND;
|
|
|
2648 case '.':
|
|
|
2649 return sym=PERIOD;
|
|
|
2650 case '/':
|
|
|
2651 if(ch!='*') return postequ(DIV,DIV+AS);
|
|
|
2652 getch();
|
|
|
2653 while(ch=='*'?getch()!='/':getch());
|
|
|
2654 getch();
|
|
|
2655 return getsym();
|
|
|
2656 default:
|
|
|
2657 error(CHERR);
|
|
|
2658 return getsym();
|
|
|
2659 }
|
|
|
2660 }
|
|
|
2661 postequ(s1,s2)
|
|
|
2662 int s1,s2;
|
|
|
2663 { if(ch=='=') {getch();return sym=s2;}
|
|
|
2664 return sym=s1;
|
|
|
2665 }
|
|
|
2666 alpha(c)
|
|
|
2667 char c;
|
|
|
2668 { return('a'<=c&&c<='z'||'A'<=c&&c<='Z'||c=='_');
|
|
|
2669 }
|
|
|
2670 digit(c)
|
|
|
2671 char c;
|
|
|
2672 { return('0'<=c&&c<='9');
|
|
|
2673 }
|
|
|
2674 NMTBL *gsearch()
|
|
|
2675 {NMTBL *nptr,*iptr;
|
|
|
2676 iptr=nptr= &ntable[hash % GSYMS];
|
|
|
2677 while(nptr->sc!=EMPTY && neqname(nptr->nm))
|
|
|
2678 { if (++nptr== &ntable[GSYMS]) nptr=ntable;
|
|
|
2679 if (nptr==iptr) error(GSERR);
|
|
|
2680 }
|
|
|
2681 if (nptr->sc == EMPTY) copy(nptr->nm);
|
|
|
2682 return nptr;
|
|
|
2683 }
|
|
|
2684 NMTBL *lsearch()
|
|
|
2685 {NMTBL *nptr,*iptr;
|
|
|
2686 iptr=nptr= &ntable[hash%LSYMS+GSYMS];
|
|
|
2687 while(nptr->sc!=EMPTY && neqname(nptr->nm))
|
|
|
2688 { if (++nptr== &ntable[LSYMS+GSYMS]) nptr= &ntable[GSYMS];
|
|
|
2689 if (nptr==iptr) error(LSERR);
|
|
|
2690 }
|
|
|
2691 if (nptr->sc == EMPTY) copy(nptr->nm);
|
|
|
2692 return nptr;
|
|
|
2693 }
|
|
|
2694 neqname(p)
|
|
|
2695 char *p;
|
|
|
2696 {char *q;
|
|
|
2697 q=name;
|
|
|
2698 while(*p) if(*p++ != *q++) return 1;
|
|
|
2699 return *q!=0;
|
|
|
2700 }
|
|
|
2701 copy(p)
|
|
|
2702 char *p;
|
|
|
2703 {char *q;
|
|
|
2704 q=name;
|
|
|
2705 while(*p++= *q++);
|
|
|
2706 }
|
|
|
2707 getstring()
|
|
|
2708 { getch();
|
|
|
2709 symval = 0;
|
|
|
2710 sptr = cheapp;
|
|
|
2711 while (ch != '"')
|
|
|
2712 { *cheapp++ = escape();
|
|
|
2713 symval++;
|
|
|
2714 if (cheapp >= cheap+CHEAPSIZE) error(STRERR);
|
|
|
2715 }
|
|
|
2716 getch();
|
|
|
2717 *cheapp++ = '\0';
|
|
|
2718 symval++;
|
|
|
2719 }
|
|
|
2720 skipspc()
|
|
|
2721 { while(ch=='\t'||ch=='\n'||ch==' '||ch=='\r') getch();
|
|
|
2722 return ch;
|
|
|
2723 }
|
|
|
2724 getch()
|
|
|
2725 { if(*chptr) return ch= *chptr++;
|
|
|
2726 if(mflag) {mflag=0;chptr=chptrsave;return ch=chsave;}
|
|
|
2727 getline();
|
|
|
2728 return getch();
|
|
|
2729 }
|
|
|
2730 char escape()
|
|
|
2731 {char c;
|
|
|
2732 if ((c=ch) == '\\')
|
|
|
2733 { if (digit(c=getch()))
|
|
|
2734 { c = ch-'0';
|
|
|
2735 if (digit(getch()))
|
|
|
2736 { c = c*8+ch-'0';
|
|
|
2737 if (digit(getch())) {c=c*8+ch-'0';getch();}
|
|
|
2738 }
|
|
|
2739 return c;
|
|
|
2740 }
|
|
|
2741 getch();
|
|
|
2742 switch(c)
|
|
|
2743 {case 'n':
|
|
|
2744 return '\n';
|
|
|
2745 case 't':
|
|
|
2746 return '\t';
|
|
|
2747 case 'b':
|
|
|
2748 return '\b';
|
|
|
2749 case 'r':
|
|
|
2750 return '\r';
|
|
|
2751 case 'f':
|
|
|
2752 return '\f';
|
|
|
2753 case '\n':
|
|
|
2754 return escape();
|
|
|
2755 default:
|
|
|
2756 return c;
|
|
|
2757 }
|
|
|
2758 }
|
|
|
2759 if (c == '\n') error(EXERR);
|
|
|
2760 getch();
|
|
|
2761 return c;
|
|
|
2762 }
|
|
|
2763 FILE *getfname()
|
|
|
2764 {int i;
|
|
|
2765 char name[LBUFSIZE];
|
|
|
2766 getch();
|
|
|
2767 if(skipspc()!='"') error(INCERR);
|
|
|
2768 for(i=0;(getch()!='"' && ch!='\n');)
|
|
|
2769 if(i<LBUFSIZE-1) name[i++]=ch;
|
|
|
2770 if(ch=='\n') error(INCERR);
|
|
|
2771 name[i]=0;
|
|
|
2772 return ( (filep+1)->fcb = fopen(name,"r") );
|
|
|
2773 }
|
|
|
2774 getline()
|
|
|
2775 {int i;
|
|
|
2776 int c;
|
|
|
2777 lineno++;
|
|
|
2778 glineno++;
|
|
|
2779 chptr=linebuf;
|
|
|
2780 i=0;
|
|
|
2781 while ((*chptr++ = c = getc(filep->fcb)) != '\n')
|
|
|
2782 { if (++i > LBUFSIZE-2) error(LNERR);
|
|
|
2783 if (c==EOF)
|
|
|
2784 { error(EOFERR);
|
|
|
2785 --chptr;
|
|
|
2786 }
|
|
|
2787 }
|
|
|
2788 *chptr = '\0';
|
|
|
2789 if (lsrc && !asmf) printf("* %s",linebuf);
|
|
|
2790 if (*(chptr = linebuf) == '#')
|
|
|
2791 { ++chptr;
|
|
|
2792 if (macroeq("define"))
|
|
|
2793 { i=mode;
|
|
|
2794 mode=GDECL;
|
|
|
2795 ch= *chptr;
|
|
|
2796 if (getsym() == IDENT)
|
|
|
2797 { if (nptr->sc == EMPTY)
|
|
|
2798 { nptr->sc = MACRO;
|
|
|
2799 nptr->dsp = (int)cheapp;
|
|
|
2800 while ((*cheapp++ = c = *chptr++)
|
|
|
2801 && c != '\n');
|
|
|
2802 *cheapp++ = '\0';
|
|
|
2803 if (cheapp >= cheap+CHEAPSIZE)
|
|
|
2804 error(STRERR);
|
|
|
2805 if (!c) error(EOFERR);
|
|
|
2806 }
|
|
|
2807 else error(MCERR);
|
|
|
2808 }
|
|
|
2809 else error(MCERR);
|
|
|
2810 mode=i;
|
|
|
2811 *(chptr = linebuf) = '\0';
|
|
|
2812 }
|
|
|
2813 else if (macroeq("include"))
|
|
|
2814 { fprintf(stderr,"%s",linebuf);
|
|
|
2815 if(filep+1 >= filestack + FILES) error(FILERR);
|
|
|
2816 if ( ((filep+1)->fcb=getfname()) == NULL) error(FILERR);
|
|
|
2817 (filep+1)->ln=lineno;
|
|
|
2818 lineno=0;
|
|
|
2819 ++filep;
|
|
|
2820 *(chptr = linebuf) = '\0';
|
|
|
2821 }
|
|
|
2822 else if (macroeq("asm"))
|
|
|
2823 { if (asmf) error(MCERR);
|
|
|
2824 asmf = 1;
|
|
|
2825 getline();
|
|
|
2826 while (asmf)
|
|
|
2827 { printf("%s",linebuf);
|
|
|
2828 getline();
|
|
|
2829 }
|
|
|
2830 }
|
|
|
2831 else if (macroeq("endasm"))
|
|
|
2832 { if (!asmf) error(MCERR);
|
|
|
2833 asmf = 0;
|
|
|
2834 }
|
|
|
2835 else if (macroeq(" "))
|
|
|
2836 getline();
|
|
|
2837 else error(MCERR);
|
|
|
2838 }
|
|
|
2839 }
|
|
|
2840
|
|
|
2841 macroeq(s)
|
|
|
2842 char *s;
|
|
|
2843 {char *p;
|
|
|
2844 for (p = chptr; *s;) if (*s++ != *p++) return 0;
|
|
|
2845 chptr = p;
|
|
|
2846 return 1;
|
|
|
2847 }
|
|
|
2848
|
|
|
2849 car(e)
|
|
|
2850 int e;
|
|
|
2851 { return heap[e];
|
|
|
2852 }
|
|
|
2853 cadr(e)
|
|
|
2854 int e;
|
|
|
2855 { return heap[e+1];
|
|
|
2856 }
|
|
|
2857 caddr(e)
|
|
|
2858 int e;
|
|
|
2859 { return heap[e+2];
|
|
|
2860 }
|
|
|
2861 cadddr(e)
|
|
|
2862 int e;
|
|
|
2863 { return heap[e+3];
|
|
|
2864 }
|
|
|
2865 list2(e1,e2)
|
|
|
2866 int e1,e2;
|
|
|
2867 {int e;
|
|
|
2868 e=getfree(2);
|
|
|
2869 heap[e]=e1;
|
|
|
2870 heap[e+1]=e2;
|
|
|
2871 return e;
|
|
|
2872 }
|
|
|
2873 list3(e1,e2,e3)
|
|
|
2874 int e1,e2,e3;
|
|
|
2875 {int e;
|
|
|
2876 e=getfree(3);
|
|
|
2877 heap[e]=e1;
|
|
|
2878 heap[e+1]=e2;
|
|
|
2879 heap[e+2]=e3;
|
|
|
2880 return e;
|
|
|
2881 }
|
|
|
2882 list4(e1,e2,e3,e4)
|
|
|
2883 int e1,e2,e3,e4;
|
|
|
2884 {int e;
|
|
|
2885 e=getfree(4);
|
|
|
2886 heap[e]=e1;
|
|
|
2887 heap[e+1]=e2;
|
|
|
2888 heap[e+2]=e3;
|
|
|
2889 heap[e+3]=e4;
|
|
|
2890 return e;
|
|
|
2891 }
|
|
|
2892 getfree(n)
|
|
|
2893 int n;
|
|
|
2894 {int e;
|
|
|
2895 switch (mode)
|
|
|
2896 {case GDECL: case GSDECL: case GUDECL: case GTDECL:
|
|
|
2897 e=gfree;
|
|
|
2898 gfree+=n;
|
|
|
2899 break;
|
|
|
2900 default:
|
|
|
2901 lfree-=n;
|
|
|
2902 e=lfree;
|
|
|
2903 }
|
|
|
2904 if(lfree<gfree) error(HPERR);
|
|
|
2905 return e;
|
|
|
2906 }
|
|
|
2907 rplacad(e,n)
|
|
|
2908 int e,n;
|
|
|
2909 { heap[e+1]=n;
|
|
|
2910 return e;
|
|
|
2911 }
|
