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Annotation of 42BSD/lib/mip/mfile1, revision 1.1

1.1     ! root        1: /*     @(#)mfile1      4.2     (Berkeley)      83/04/04        */
        !             2: 
        !             3: # include "macdefs"
        !             4: # include "manifest"
        !             5: 
        !             6: /*     storage classes  */
        !             7: # define SNULL 0
        !             8: # define AUTO 1
        !             9: # define EXTERN 2
        !            10: # define STATIC 3
        !            11: # define REGISTER 4
        !            12: # define EXTDEF 5
        !            13: # define LABEL 6
        !            14: # define ULABEL 7
        !            15: # define MOS 8
        !            16: # define PARAM 9
        !            17: # define STNAME 10
        !            18: # define MOU 11
        !            19: # define UNAME 12
        !            20: # define TYPEDEF 13
        !            21: # define FORTRAN 14
        !            22: # define ENAME 15
        !            23: # define MOE 16
        !            24: # define UFORTRAN 17
        !            25: # define USTATIC 18
        !            26:        /* field size is ORed in */
        !            27: # define FIELD 0100
        !            28: # define FLDSIZ 077
        !            29: # ifndef BUG1
        !            30: extern char *scnames();
        !            31: # endif
        !            32: 
        !            33: /*     location counters */
        !            34: # define PROG 0
        !            35: # define DATA 1
        !            36: # define ADATA 2
        !            37: # define STRNG 3
        !            38: # define ISTRNG 4
        !            39: # define STAB 5
        !            40: 
        !            41: 
        !            42: /* symbol table flags */
        !            43: # define SMOS 01
        !            44: # define SHIDDEN 02
        !            45: # define SHIDES 04
        !            46: # define SSET 010
        !            47: # define SREF 020
        !            48: # define SNONUNIQ 040
        !            49: # define STAG 0100
        !            50: 
        !            51: # ifndef FIXDEF
        !            52: # define FIXDEF(p)
        !            53: #endif
        !            54: # ifndef FIXARG
        !            55: # define FIXARG(p)
        !            56: # endif
        !            57: # ifndef FIXSTRUCT
        !            58: # define FIXSTRUCT(a,b)
        !            59: # endif
        !            60: 
        !            61:        /* alignment of initialized quantities */
        !            62: # ifndef AL_INIT
        !            63: #      define  AL_INIT ALINT
        !            64: # endif
        !            65: 
        !            66: struct symtab {
        !            67: #ifndef FLEXNAMES
        !            68:        char sname[NCHNAM];
        !            69: #else
        !            70:        char *sname;
        !            71: #endif
        !            72:        TWORD stype;  /* type word */
        !            73: 
        !            74:        char sclass;  /* storage class */
        !            75:        char slevel;  /* scope level */
        !            76:        char sflags;  /* flags for set, use, hidden, mos, etc. */
        !            77:        int offset;  /* offset or value */
        !            78:        short dimoff; /* offset into the dimension table */
        !            79:        short sizoff; /* offset into the size table */
        !            80:        short suse;  /* line number of last use of the variable */
        !            81:        };
        !            82: 
        !            83: 
        !            84: # ifdef ONEPASS
        !            85: /* NOPREF must be defined for use in first pass tree machine */
        !            86: # define NOPREF 020000  /* no preference for register assignment */
        !            87: #else
        !            88: 
        !            89: union ndu {
        !            90:        struct {
        !            91:                int op;
        !            92:                TWORD type;
        !            93:                int cdim, csiz;
        !            94:                }fn; /* front node */
        !            95:        struct {
        !            96:                int op;
        !            97:                TWORD type;
        !            98:                int cdim, csiz;
        !            99:                NODE *left;
        !           100:                NODE * right;
        !           101:                }in; /* interior node */
        !           102:        
        !           103:        struct {
        !           104:                /* this structure is the same as above,
        !           105:                   but is used when a value, rather than
        !           106:                   address, is kept in +left */
        !           107:                int op;
        !           108:                TWORD type;
        !           109:                int cdim, csiz;
        !           110:                CONSZ lval;
        !           111:                int rval;
        !           112:                }tn; /* terminal node */
        !           113:        
        !           114:        struct {
        !           115:                /* this structure is used when a floating point constant
        !           116:                   is being computed */
        !           117:                int op;
        !           118:                TWORD type;
        !           119:                int cdim, csiz;
        !           120:                double dval;
        !           121:                }fpn; /* floating point node */
        !           122: 
        !           123:        };
        !           124: # endif
        !           125: 
        !           126: struct sw {
        !           127:        CONSZ sval;
        !           128:        int slab;
        !           129:        };
        !           130: 
        !           131: extern struct sw swtab[];
        !           132: extern struct sw *swp;
        !           133: extern int swx;
        !           134: 
        !           135: extern int ftnno;
        !           136: extern int blevel;
        !           137: extern int instruct, stwart;
        !           138: 
        !           139: extern int lineno, nerrors;
        !           140: typedef union {
        !           141:        int intval;
        !           142:        NODE * nodep;
        !           143:        } YYSTYPE;
        !           144: extern YYSTYPE yylval;
        !           145: 
        !           146: extern CONSZ lastcon;
        !           147: extern double dcon;
        !           148: 
        !           149: extern char ftitle[];
        !           150: extern char ititle[];
        !           151: extern struct symtab stab[];
        !           152: extern int curftn;
        !           153: extern int curclass;
        !           154: extern int curdim;
        !           155: extern int dimtab[];
        !           156: extern int paramstk[];
        !           157: extern int paramno;
        !           158: extern int autooff, argoff, strucoff;
        !           159: extern int regvar;
        !           160: extern int minrvar;
        !           161: extern int brkflag;
        !           162: extern char yytext[];
        !           163: 
        !           164: extern int strflg;
        !           165: 
        !           166: extern OFFSZ inoff;
        !           167: 
        !           168: extern int reached;
        !           169: 
        !           170: /*     tunnel to buildtree for name id's */
        !           171: 
        !           172: extern int idname;
        !           173: 
        !           174: extern NODE node[];
        !           175: extern NODE *lastfree;
        !           176: 
        !           177: extern int cflag, hflag, pflag;
        !           178: 
        !           179: /* various labels */
        !           180: extern int brklab;
        !           181: extern int contlab;
        !           182: extern int flostat;
        !           183: extern int retlab;
        !           184: extern int retstat;
        !           185: extern int asavbc[], *psavbc;
        !           186: 
        !           187: /*     flags used in structures/unions */
        !           188: 
        !           189: # define SEENAME 01
        !           190: # define INSTRUCT 02
        !           191: # define INUNION 04
        !           192: # define FUNNYNAME 010
        !           193: # define TAGNAME 020
        !           194: 
        !           195: /*     flags used in the (elementary) flow analysis ... */
        !           196: 
        !           197: # define FBRK 02
        !           198: # define FCONT 04
        !           199: # define FDEF 010
        !           200: # define FLOOP 020
        !           201: 
        !           202: /*     flags used for return status */
        !           203: 
        !           204: # define RETVAL 1
        !           205: # define NRETVAL 2
        !           206: 
        !           207: /*     used to mark a constant with no name field */
        !           208: 
        !           209: # define NONAME 040000
        !           210: 
        !           211:        /* mark an offset which is undefined */
        !           212: 
        !           213: # define NOOFFSET (-10201)
        !           214: 
        !           215: /*     declarations of various functions */
        !           216: 
        !           217: extern NODE
        !           218:        *buildtree(),
        !           219:        *bdty(),
        !           220:        *mkty(),
        !           221:        *rstruct(),
        !           222:        *dclstruct(),
        !           223:        *getstr(),
        !           224:        *tymerge(),
        !           225:        *stref(),
        !           226:        *offcon(),
        !           227:        *bcon(),
        !           228:        *bpsize(),
        !           229:        *convert(),
        !           230:        *pconvert(),
        !           231:        *oconvert(),
        !           232:        *ptmatch(),
        !           233:        *tymatch(),
        !           234:        *makety(),
        !           235:        *block(),
        !           236:        *doszof(),
        !           237:        *talloc(),
        !           238:        *optim(),
        !           239:        *strargs(),
        !           240:        *clocal();
        !           241: 
        !           242: OFFSZ  tsize(),
        !           243:        psize();
        !           244: 
        !           245: TWORD  types();
        !           246: 
        !           247: 
        !           248: double atof();
        !           249: 
        !           250: char *exname(), *exdcon();
        !           251: 
        !           252: # define checkst(x)
        !           253: 
        !           254: # ifndef CHARCAST
        !           255: /* to make character constants into character connstants */
        !           256: /* this is a macro to defend against cross-compilers, etc. */
        !           257: # define CHARCAST(x) (char)(x)
        !           258: # endif
        !           259: 
        !           260: # define BCSZ 100 /* size of the table to save break and continue labels */
        !           261: # define SYMTSZ 3000 /* size of the symbol table (was 500) */
        !           262: # define DIMTABSZ 4200 /* size of the dimension/size table (was 800) */
        !           263: # define PARAMSZ 300 /* size of the parameter stack */
        !           264: # define SWITSZ 500 /* size of switch table */
        !           265: /*     special interfaces for yacc alone */
        !           266: /*     These serve as abbreviations of 2 or more ops:
        !           267:        ASOP    =, = ops
        !           268:        RELOP   LE,LT,GE,GT
        !           269:        EQUOP   EQ,NE
        !           270:        DIVOP   DIV,MOD
        !           271:        SHIFTOP LS,RS
        !           272:        ICOP    ICR,DECR
        !           273:        UNOP    NOT,COMPL
        !           274:        STROP   DOT,STREF
        !           275: 
        !           276:        */
        !           277: # define ASOP 25
        !           278: # define RELOP 26
        !           279: # define EQUOP 27
        !           280: # define DIVOP 28
        !           281: # define SHIFTOP 29
        !           282: # define INCOP 30
        !           283: # define UNOP 31
        !           284: # define STROP 32
        !           285: 
        !           286: # define LP 50
        !           287: # define RP 51
        !           288: # define LC 52
        !           289: # define RC 53

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