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Annotation of 41BSD/cmd/as/astoks.h, revision 1.1.1.1

1.1       root        1: /* Copyright (c) 1980 Regents of the University of California */
                      2: /* "@(#)astoks.h 4.2 8/16/80" */
                      3: /*
                      4:  *     Message to the wary:  The order of tokens has been
                      5:  *     hand optimized and assigned to that all switch statements
                      6:  *     are implemented by a casel instruction on the VAX. 
                      7:  *     there are 4 switch statements that have to be worried about:
                      8:  *     l)      Per character switch in the character scanner (scan_dot_s)
                      9:  *     2)      Per token switch in the buffer manager (yylex)
                     10:  *     3)      Per keyword switch in the parser (yyparse)
                     11:  *     4)      Leading token switch for argments to opcodes
                     12:  *     
                     13:  *     You can't just add new tokens willy-nilly; make sure that you
                     14:  *     add them into the proper order!
                     15:  */
                     16: # define FIRSTTOKEN    0
                     17: 
                     18: /*
                     19:  *     Tokens between ISPACE and INSTn are used by the per keyword switch
                     20:  */
                     21: # define ISPACE        1
                     22: # define IBYTE                 2
                     23: # define IWORD                 3
                     24: # define IINT          4
                     25: # define ILONG                 5
                     26: # define IDATA                 6
                     27: # define IGLOBAL       7
                     28: # define ISET          8
                     29: # define ITEXT                 9
                     30: # define ICOMM                 10
                     31: # define ILCOMM        11
                     32: # define IFLOAT        12
                     33: # define IDOUBLE       13
                     34: # define IORG          14
                     35: # define IASCII        15
                     36: # define IASCIZ        16
                     37: # define ILSYM                 17
                     38: # define IFILE                 18
                     39: # define ILINENO       19
                     40: # define IABORT        20
                     41: # define IFILL         21
                     42: # define IQUAD         22
                     43: /*
                     44:  *     Tokens between ISTAB and REG are used in the per token switch
                     45:  */
                     46: # define ISTAB                 23
                     47: # define ISTABSTR      24
                     48: # define ISTABNONE     25
                     49: # define ISTABDOT      26
                     50: # define IJXXX                 27
                     51: # define IALIGN        28
                     52: # define INST0                 29
                     53: # define INSTn                 30
                     54: 
                     55: # define BFINT         31
                     56: # define PARSEEOF      32
                     57: # define ILINESKIP     33
                     58: # define VOID          34
                     59: # define SKIP          35
                     60: # define INT           36
                     61: # define FLTNUM                37
                     62: # define NAME          38
                     63: # define STRING                39
                     64: # define QUAD          40
                     65: /*
                     66:  *     Tokens between SIZESPEC and REGOP are used in the instruction
                     67:  *     argument switch
                     68:  */
                     69: # define SIZESPEC      41
                     70: # define REG           42
                     71: # define MUL           43
                     72: # define LITOP         44
                     73: # define LP            45
                     74: # define MP            46
                     75: /*     
                     76:  *     Tokens between REGOP and DIV are used in the per character switch
                     77:  */
                     78: # define NEEDSBUF      48      /*signal refilling the input buffer*/
                     79: # define REGOP         49      /*the percent sign*/
                     80: # define NL            50
                     81: # define SCANEOF       51
                     82: # define BADCHAR       52
                     83: # define SP            53
                     84: # define ALPH          54
                     85: # define DIG           55
                     86: # define SQ            56
                     87: # define DQ            57
                     88: # define SH            58
                     89: # define LSH           59
                     90: # define RSH           60
                     91: # define MINUS         61
                     92: # define SIZEQUOTE     62
                     93: /*
                     94:  *     Tokens between XOR and RP are used at random (primarily by the
                     95:  *     expression analyzer), and not used in any switch
                     96:  */
                     97: # define XOR           64
                     98: # define DIV           65
                     99: 
                    100: # define SEMI          66
                    101: # define COLON         67
                    102: # define PLUS          68
                    103: # define IOR           69 
                    104: # define AND           70
                    105: # define TILDE         71
                    106: # define ORNOT         72
                    107: # define CM            73
                    108: # define LB            74
                    109: # define RB            75
                    110: # define RP            76
                    111: 
                    112: # define LASTTOKEN     80

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