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Annotation of researchv10no/cmd/PDP11/11c/c05.c, revision 1.1

1.1     ! root        1: #include "c0.h"
        !             2: /*
        !             3:  *  info on operators:
        !             4:  *   01-- is binary operator
        !             5:  *   02-- left (or only) operand must be lvalue
        !             6:  *   04-- is relational operator
        !             7:  *  010-- is assignment-type operator
        !             8:  *  020-- non-float req. on left
        !             9:  *  040-- non-float req. on right
        !            10:  * 0100-- is commutative
        !            11:  * 0200-- is right, not left-associative
        !            12:  * 0400-- is leaf of tree
        !            13:  * *0XX000-- XX is priority of operator
        !            14:  */
        !            15: int opdope[] = {
        !            16:        000000, /* EOFC */
        !            17:        000000, /* ; */
        !            18:        000000, /* { */
        !            19:        000000, /* } */
        !            20:        036001, /* [ */
        !            21:        002000, /* ] */
        !            22:        037000, /* ( */
        !            23:        002000, /* ) */
        !            24:        014201, /* : */
        !            25:        007001, /* , */
        !            26:        000001, /* field selection */
        !            27:        034201, /* CAST */
        !            28:        000000, /* ETYPE */
        !            29:        000001, /* integer->ptr */
        !            30:        000001, /* ptr->integer */
        !            31:        000001, /* long->ptr */
        !            32:        000000, /* 16 */
        !            33:        000000, /* 17 */
        !            34:        000000, /* 18 */
        !            35:        000000, /* 19 */
        !            36:        000400, /* name */
        !            37:        000400, /* short constant */
        !            38:        000400, /* string */
        !            39:        000400, /* float */
        !            40:        000400, /* double */
        !            41:        000400, /* long constant */
        !            42:        000400, /* long constant <= 16 bits */
        !            43:        000000, /* 27 */
        !            44:        000000, /* 28 */
        !            45:        000400, /* () empty arglist */
        !            46:        074203, /* ++pre */
        !            47:        074203, /* --pre */
        !            48:        074203, /* ++post */
        !            49:        074203, /* --post */
        !            50:        034200, /* !un */
        !            51:        034202, /* &un */
        !            52:        034220, /* *un */
        !            53:        034200, /* -un */
        !            54:        034220, /* ~un */
        !            55:        036001, /* . (structure reference) */
        !            56:        070101, /* + */
        !            57:        070001, /* - */
        !            58:        032101, /* * */
        !            59:        032001, /* / */
        !            60:        032001, /* % */
        !            61:        026061, /* >> */
        !            62:        026061, /* << */
        !            63:        020161, /* & */
        !            64:        017161, /* | */
        !            65:        017161, /* ^ */
        !            66:        036001, /* -> */
        !            67:        000000, /* int -> double */
        !            68:        000000, /* double -> int */
        !            69:        016001, /* && */
        !            70:        015001, /* || */
        !            71:        030001, /* &~ */
        !            72:        000000, /* 56 */
        !            73:        000000, /* 57 */
        !            74:        000000, /* 58 */
        !            75:        000000, /* 59 */
        !            76:        022005, /* == */
        !            77:        022005, /* != */
        !            78:        024005, /* <= */
        !            79:        024005, /* < */
        !            80:        024005, /* >= */
        !            81:        024005, /* > */
        !            82:        024005, /* <p */
        !            83:        024005, /* <=p */
        !            84:        024005, /* >p */
        !            85:        024005, /* >=p */
        !            86:        052213, /* += */
        !            87:        052213, /* -= */
        !            88:        012213, /* *= */
        !            89:        012213, /* /= */
        !            90:        012213, /* %= */
        !            91:        012253, /* >>= */
        !            92:        012253, /* <<= */
        !            93:        012253, /* &= */
        !            94:        012253, /* |= */
        !            95:        012253, /* ^= */
        !            96:        012213, /* = */
        !            97:        000000, /* 81 */
        !            98:        000000, /* 82 */
        !            99:        000000, /* 83 */
        !           100:        000000, /* 84 */
        !           101:        000000, /* 85 */
        !           102:        000000, /* 86 */
        !           103:        000000, /* 87 */
        !           104:        000000, /* 88 */
        !           105:        000000, /* 89 */
        !           106:        014201, /* ? */
        !           107:        034200, /* sizeof */
        !           108:        000000, /* 92 */
        !           109:        021101, /* min */
        !           110:        021101, /* minp */
        !           111:        021101, /* max */
        !           112:        021101, /* maxp */
        !           113:        007001, /* , */
        !           114:        000000, /* 98 */
        !           115:        000000, /* 99 */
        !           116:        036001, /* call */
        !           117:        036001, /* mcall */
        !           118:        000000, /* goto */
        !           119:        000000, /* jump cond */
        !           120:        000000, /* branch cond */
        !           121:        000000, /* 105 */
        !           122:        000000, /* 106 */
        !           123:        000000, /* 107 */
        !           124:        000000, /* 108 */
        !           125:        000000, /* char->int */
        !           126:        000000  /* force r0 */
        !           127: };
        !           128: 
        !           129: /*
        !           130:  * conversion table:
        !           131:  * FTI: float (or double) to integer
        !           132:  * ITF: integer to float
        !           133:  * ITP: integer to pointer
        !           134:  * ITL: integer to long
        !           135:  * LTI: long to integer
        !           136:  * LTF: long to float
        !           137:  * FTL: float to long
        !           138:  * PTI: pointer to integer
        !           139:  * LTP: long to ptr (ptr[long])
        !           140:  * XX: usually illegal
        !           141:  * When FTI, LTI, FTL are added in they specify
        !           142:  * that it is the left operand that should be converted.
        !           143:  * For + this is done and the conversion is turned back into
        !           144:  * ITF, ITL, LTF.
        !           145:  * For = however the left operand can't be converted
        !           146:  * and the specified conversion is applied to the rhs.
        !           147:  */
        !           148: char cvtab[4][4] = {
        !           149: /*             int     double          long            ptr */
        !           150: /* int */      0,      (FTI<<4)+ITF,   (LTI<<4)+ITL,   (ITP<<4)+ITP,   
        !           151: /* double */   ITF,    0,              LTF,            XX,
        !           152: /* long */     ITL,    (FTL<<4)+LTF,   0,              (LTP<<4)+LTP,
        !           153: /* ptr */      ITP,    XX,             LTP,            PTI,
        !           154: };
        !           155: 
        !           156: /*
        !           157:  * relate conversion numbers to operators
        !           158:  */
        !           159: char   cvntab[] = {
        !           160:        0, ITOF, ITOL, LTOF, ITOP, PTOI, FTOI, LTOI, FTOL, LTOP,
        !           161: };
        !           162: 
        !           163: /*
        !           164:  * character type table
        !           165:  */
        !           166: char ctab[] = {
        !           167:        EOFC,   UNKN,   UNKN,   UNKN,   UNKN,   UNKN,   UNKN,   UNKN,
        !           168:        UNKN,   SPACE,  NEWLN,  SPACE,  SPACE,  UNKN,   UNKN,   UNKN,
        !           169:        UNKN,   UNKN,   UNKN,   UNKN,   UNKN,   UNKN,   UNKN,   UNKN,
        !           170:        UNKN,   UNKN,   UNKN,   UNKN,   UNKN,   UNKN,   UNKN,   UNKN,
        !           171:        SPACE,  EXCLA,  DQUOTE, SHARP,  UNKN,   MOD,    AND,    SQUOTE,
        !           172:        LPARN,  RPARN,  TIMES,  PLUS,   COMMA,  MINUS,  PERIOD, DIVIDE,
        !           173:        DIGIT,  DIGIT,  DIGIT,  DIGIT,  DIGIT,  DIGIT,  DIGIT,  DIGIT,
        !           174:        DIGIT,  DIGIT,  COLON,  SEMI,   LESS,   ASSIGN, GREAT,  QUEST,
        !           175:        UNKN,   LETTER, LETTER, LETTER, LETTER, LETTER, LETTER, LETTER,
        !           176:        LETTER, LETTER, LETTER, LETTER, LETTER, LETTER, LETTER, LETTER,
        !           177:        LETTER, LETTER, LETTER, LETTER, LETTER, LETTER, LETTER, LETTER,
        !           178:        LETTER, LETTER, LETTER, LBRACK, BSLASH, RBRACK, EXOR,   LETTER,
        !           179:        UNKN,   LETTER, LETTER, LETTER, LETTER, LETTER, LETTER, LETTER,
        !           180:        LETTER, LETTER, LETTER, LETTER, LETTER, LETTER, LETTER, LETTER,
        !           181:        LETTER, LETTER, LETTER, LETTER, LETTER, LETTER, LETTER, LETTER,
        !           182:        LETTER, LETTER, LETTER, LBRACE, OR,     RBRACE, COMPL,  UNKN
        !           183: };

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