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Annotation of 43BSDTahoe/ucb/pascal/src/tmps.h, revision 1.1

1.1     ! root        1: /*
        !             2:  * Copyright (c) 1980 Regents of the University of California.
        !             3:  * All rights reserved.  The Berkeley software License Agreement
        !             4:  * specifies the terms and conditions for redistribution.
        !             5:  *
        !             6:  *     @(#)tmps.h      5.2 (Berkeley) 11/12/86
        !             7:  */
        !             8: 
        !             9: /*
        !            10:  * The following structure is used
        !            11:  * to keep track of the amount of variable
        !            12:  * storage required by each block.
        !            13:  * "Max" is the high water mark, "off"
        !            14:  * the current need. Temporaries for "for"
        !            15:  * loops and "with" statements are allocated
        !            16:  * in the local variable area and these
        !            17:  * numbers are thereby changed if necessary.
        !            18:  *
        !            19:  * for the compiler,
        !            20:  *     low_water is the lowest number register allocated of its type
        !            21:  *     next_avail is the next available register of its type
        !            22:  */
        !            23: 
        !            24: #ifdef PC
        !            25: #ifdef vax
        !            26:     /*
        !            27:      * the number of register types.
        !            28:      * the details of how many of each kind of register there is
        !            29:      * (and what they are for) is known in tmps.c
        !            30:      */
        !            31: #define        NUMREGTYPES     1
        !            32: #define        REG_GENERAL     0
        !            33: #endif vax
        !            34: 
        !            35: #ifdef tahoe
        !            36:     /*
        !            37:      * the number of register types.
        !            38:      * the details of how many of each kind of register there is
        !            39:      * (and what they are for) is known in tmps.c
        !            40:      */
        !            41: #define        NUMREGTYPES     1
        !            42: #define        REG_GENERAL     0
        !            43: #endif tahoe
        !            44: 
        !            45: #ifdef mc68000
        !            46:     /*
        !            47:      * the number of register types.
        !            48:      * the details of how many of each kind of register there is
        !            49:      * (and what they are for) is known in tmps.c
        !            50:      */
        !            51: #define        NUMREGTYPES     2
        !            52: #define        REG_DATA        0
        !            53: #define        REG_ADDR        1
        !            54: #endif mc68000
        !            55: #endif PC
        !            56: 
        !            57: struct om {
        !            58:        long    om_max;
        !            59: #ifdef PC
        !            60:        long    low_water[NUMREGTYPES];
        !            61: #endif PC
        !            62:        struct tmps {
        !            63:            long        om_off;
        !            64: #ifdef PC
        !            65:            long        next_avail[NUMREGTYPES];
        !            66: #endif PC
        !            67:        }       curtmps;
        !            68: } sizes[DSPLYSZ];
        !            69: 
        !            70:     /*
        !            71:      * an enumeration for whether a temporary can be a register.  cf. tmps.c
        !            72:      */
        !            73: #define NOREG 0
        !            74: #define REGOK 1

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