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Annotation of 42BSD/lib/mip/mfile2, revision 1.1

1.1     ! root        1: # include "macdefs"
        !             2: # include "mac2defs"
        !             3: # include "manifest"
        !             4: 
        !             5: # ifdef ONEPASS
        !             6: 
        !             7: /*     bunch of stuff for putting the passes together... */
        !             8: # define crslab crs2lab
        !             9: # define where where2
        !            10: # define xdebug x2debug
        !            11: # define tdebug t2debug
        !            12: # define deflab def2lab
        !            13: # define edebug e2debug
        !            14: # define eprint e2print
        !            15: # define getlab get2lab
        !            16: # define filename ftitle
        !            17: # endif
        !            18: 
        !            19: /*     cookies, used as arguments to codgen */
        !            20: 
        !            21: # define FOREFF 01 /* compute for effects only */
        !            22: # define INAREG 02 /* compute into a register */
        !            23: # define INTAREG 04 /* compute into a scratch register */
        !            24: # define INBREG 010 /* compute into a lvalue register */
        !            25: # define INTBREG 020 /* compute into a scratch lvalue register */
        !            26: # define FORCC 040 /* compute for condition codes only */
        !            27: # define INTEMP 010000 /* compute into a temporary location */
        !            28: # define FORARG 020000 /* compute for an argument of a function */
        !            29: # define FORREW 040000 /* search the table, looking for a rewrite rule */
        !            30: 
        !            31:        /* OP descriptors */
        !            32:        /* the ASG operator may be used on some of these */
        !            33: 
        !            34: # define OPSIMP 010000    /* +, -, &, |, ^ */
        !            35: # define OPCOMM 010002  /* +, &, |, ^ */
        !            36: # define OPMUL 010004  /* *, / */
        !            37: # define OPDIV 010006 /* /, % */
        !            38: # define OPUNARY 010010  /* unary ops */
        !            39: # define OPLEAF 010012  /* leaves */
        !            40: # define OPANY 010014  /* any op... */
        !            41: # define OPLOG 010016 /* logical ops */
        !            42: # define OPFLOAT 010020 /* +, -, *, or / (for floats) */
        !            43: # define OPSHFT 010022  /* <<, >> */
        !            44: # define OPLTYPE 010024  /* leaf type nodes (e.g, NAME, ICON, etc. ) */
        !            45: 
        !            46:        /* match returns */
        !            47: 
        !            48: # define MNOPE 010000
        !            49: # define MDONE 010001
        !            50: 
        !            51:        /* shapes */
        !            52: 
        !            53: # define SANY 01       /* same as FOREFF */
        !            54: # define SAREG 02      /* same as INAREG */
        !            55: # define STAREG 04     /* same as INTAREG */
        !            56: # define SBREG 010     /* same as INBREG */
        !            57: # define STBREG 020    /* same as INTBREG */
        !            58: # define SCC 040       /* same as FORCC */
        !            59: # define SNAME 0100
        !            60: # define SCON 0200
        !            61: # define SFLD 0400
        !            62: # define SOREG 01000
        !            63: /* indirection or wild card shapes */
        !            64: # ifndef WCARD1
        !            65: # define STARNM 02000
        !            66: # endif
        !            67: # ifndef WCARD2
        !            68: # define STARREG 04000
        !            69: # endif
        !            70: # define SWADD 040000
        !            71: # define SPECIAL 0100000
        !            72: # define SZERO SPECIAL
        !            73: # define SONE (SPECIAL|1)
        !            74: # define SMONE (SPECIAL|2)
        !            75: # define SCCON (SPECIAL|3)     /* -256 <= constant < 256 */
        !            76: # define SSCON (SPECIAL|4)     /* -32768 <= constant < 32768 */
        !            77: # define SSOREG (SPECIAL|5)    /* non-indexed OREG */
        !            78: 
        !            79:        /* FORARG and INTEMP are carefully not conflicting with shapes */
        !            80: 
        !            81:        /* types */
        !            82: 
        !            83: # define TCHAR 01
        !            84: # define TSHORT 02
        !            85: # define TINT 04
        !            86: # define TLONG 010
        !            87: # define TFLOAT 020
        !            88: # define TDOUBLE 040
        !            89: # define TPOINT 0100
        !            90: # define TUCHAR 0200
        !            91: # define TUSHORT 0400
        !            92: # define TUNSIGNED 01000
        !            93: # define TULONG 02000
        !            94: # define TPTRTO 04000  /* pointer to one of the above */
        !            95: # define TANY 010000  /* matches anything within reason */
        !            96: # define TSTRUCT 020000   /* structure or union */
        !            97: 
        !            98:        /* reclamation cookies */
        !            99: 
        !           100: # define RNULL 0    /* clobber result */
        !           101: # define RLEFT 01
        !           102: # define RRIGHT 02
        !           103: # define RESC1 04
        !           104: # define RESC2 010
        !           105: # define RESC3 020
        !           106: # define RESCC 04000
        !           107: # define RNOP 010000   /* DANGER: can cause loops.. */
        !           108: 
        !           109:        /* needs */
        !           110: 
        !           111: # define NAREG 01
        !           112: # define NACOUNT 03
        !           113: # define NAMASK 017
        !           114: # define NASL 04  /* share left register */
        !           115: # define NASR 010 /* share right register */
        !           116: # define NBREG 020
        !           117: # define NBCOUNT 060
        !           118: # define NBMASK 0360
        !           119: # define NBSL 0100
        !           120: # define NBSR 0200
        !           121: # define NTEMP 0400
        !           122: # define NTMASK 07400
        !           123: # define REWRITE 010000
        !           124: # define EITHER 040000 /* "either" modifier for needs */
        !           125: 
        !           126: 
        !           127: # define MUSTDO 010000   /* force register requirements */
        !           128: # define NOPREF 020000  /* no preference for register assignment */
        !           129: 
        !           130: 
        !           131:        /* register allocation */
        !           132: 
        !           133: extern int rstatus[];
        !           134: extern int busy[];
        !           135: 
        !           136: extern struct respref { int cform; int mform; } respref[];
        !           137: 
        !           138: # define isbreg(r) (rstatus[r]&SBREG)
        !           139: # define istreg(r) (rstatus[r]&(STBREG|STAREG))
        !           140: # define istnode(p) (p->in.op==REG && istreg(p->tn.rval))
        !           141: 
        !           142: # define TBUSY 01000
        !           143: # define REGLOOP(i) for(i=0;i<REGSZ;++i)
        !           144: 
        !           145: # define SETSTO(x,y) (stotree=(x),stocook=(y))
        !           146: extern int stocook;
        !           147: # define DELAYS 20
        !           148: extern NODE *deltrees[DELAYS];
        !           149: extern int deli;   /* mmmmm */
        !           150: 
        !           151: extern NODE *stotree;
        !           152: extern int callflag;
        !           153: 
        !           154: extern int fregs;
        !           155: 
        !           156: # ifndef ONEPASS
        !           157: union ndu {
        !           158: 
        !           159:        struct {
        !           160:                int op;
        !           161:                int rall;
        !           162:                TWORD type;
        !           163:                int su;
        !           164:                int stalign;  /* alignment of structure objects */
        !           165: #ifndef FLEXNAMES
        !           166:                char name[NCHNAM];
        !           167: #else
        !           168:                char *name;
        !           169: #endif
        !           170:                NODE *left;
        !           171:                NODE *right;
        !           172:                }in; /* interior node */
        !           173:        
        !           174:        struct {
        !           175:                int op;
        !           176:                int rall;
        !           177:                TWORD type;
        !           178:                int su;
        !           179:                int stalign;  /* alignment of structure objects */
        !           180: #ifndef FLEXNAMES
        !           181:                char name[NCHNAM];
        !           182: #else
        !           183:                char *name;
        !           184: #endif
        !           185:                CONSZ lval;
        !           186:                int rval;
        !           187:                }tn; /* terminal node */
        !           188:        
        !           189:        struct {
        !           190:                int op, rall;
        !           191:                TWORD type;
        !           192:                int su;
        !           193:                int stalign;  /* alignment of structure objects */
        !           194:                int label;  /* for use with branching */
        !           195:                }bn; /* branch node */
        !           196: 
        !           197:        struct {
        !           198:                int op, rall;
        !           199:                TWORD type;
        !           200:                int su;
        !           201:                int stalign;  /* alignment of structure objects */
        !           202:                int stsize;  /* sizes of structure objects */
        !           203:                }stn; /* structure node */
        !           204: 
        !           205:        };
        !           206: #endif
        !           207: 
        !           208: extern NODE node[];
        !           209: 
        !           210: extern struct optab {
        !           211:        int op;
        !           212:        int visit;
        !           213:        int lshape;
        !           214:        int ltype;
        !           215:        int rshape;
        !           216:        int rtype;
        !           217:        int needs;
        !           218:        int rewrite;
        !           219:        char * cstring;
        !           220:        }
        !           221:        table[];
        !           222: 
        !           223: extern NODE resc[];
        !           224: 
        !           225: extern OFFSZ tmpoff;
        !           226: extern OFFSZ maxoff;
        !           227: extern OFFSZ baseoff;
        !           228: extern OFFSZ maxtemp;
        !           229: extern int maxtreg;
        !           230: extern int ftnno;
        !           231: extern int rtyflg;
        !           232: 
        !           233: extern int nrecur;  /* flag to keep track of recursions */
        !           234: 
        !           235: # define NRECUR (10*TREESZ)
        !           236: 
        !           237: extern NODE
        !           238:        *talloc(),
        !           239:        *eread(),
        !           240:        *tcopy(),
        !           241:        *getlr();
        !           242: 
        !           243: extern CONSZ rdin();
        !           244: 
        !           245: extern int eprint();
        !           246: 
        !           247: extern char *rnames[];
        !           248: 
        !           249: extern int lineno;
        !           250: extern char filename[];
        !           251: extern int fldshf, fldsz;
        !           252: extern int lflag, xdebug, udebug, edebug, odebug, rdebug, radebug, tdebug, sdebug;
        !           253: 
        !           254: #ifndef callchk
        !           255: #define callchk(x) allchk()
        !           256: #endif
        !           257: 
        !           258: #ifndef PUTCHAR
        !           259: # define PUTCHAR(x) putchar(x)
        !           260: #endif
        !           261: 
        !           262:        /* macros for doing double indexing */
        !           263: # define R2PACK(x,y,z) (0200*((x)+1)+y+040000*z)
        !           264: # define R2UPK1(x) ((((x)>>7)-1)&0177)
        !           265: # define R2UPK2(x) ((x)&0177)
        !           266: # define R2UPK3(x) (x>>14)
        !           267: # define R2TEST(x) ((x)>=0200)
        !           268: 
        !           269: # ifdef MULTILEVEL
        !           270: 
        !           271: union mltemplate{
        !           272:        struct ml_head{
        !           273:                int tag; /* identifies class of tree */
        !           274:                int subtag; /* subclass of tree */
        !           275:                union mltemplate * nexthead; /* linked by mlinit() */
        !           276:                } mlhead;
        !           277:        struct ml_node{
        !           278:                int op; /* either an operator or op description */
        !           279:                int nshape; /* shape of node */
        !           280:                /* both op and nshape must match the node.
        !           281:                 * where the work is to be done entirely by
        !           282:                 * op, nshape can be SANY, visa versa, op can
        !           283:                 * be OPANY.
        !           284:                 */
        !           285:                int ntype; /* type descriptor from mfile2 */
        !           286:                } mlnode;
        !           287:        };
        !           288: 
        !           289: # endif

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