Annotation of gforth/forth.h, revision 1.27

1.19      anton       1: /* common header file
                      2: 
                      3:   Copyright (C) 1995 Free Software Foundation, Inc.
                      4: 
                      5:   This file is part of Gforth.
                      6: 
                      7:   Gforth is free software; you can redistribute it and/or
                      8:   modify it under the terms of the GNU General Public License
                      9:   as published by the Free Software Foundation; either version 2
                     10:   of the License, or (at your option) any later version.
                     11: 
                     12:   This program is distributed in the hope that it will be useful,
                     13:   but WITHOUT ANY WARRANTY; without even the implied warranty of
                     14:   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
                     15:   GNU General Public License for more details.
                     16: 
                     17:   You should have received a copy of the GNU General Public License
                     18:   along with this program; if not, write to the Free Software
                     19:   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
1.1       anton      20: */
                     21: 
1.21      anton      22: #include "config.h"
                     23: #include <limits.h>
1.26      pazsan     24: #if defined(NeXT)
                     25: #  include <libc.h>
                     26: #endif /* NeXT */
1.21      anton      27: 
1.1       anton      28: typedef void *Label;
                     29: 
1.2       pazsan     30: /* symbol indexed constants */
                     31: 
                     32: #define DOCOL  0
                     33: #define DOCON  1
                     34: #define DOVAR  2
                     35: #define DOUSER 3
1.8       anton      36: #define DODEFER        4
1.16      anton      37: #define DOFIELD        5
1.14      pazsan     38: #define DODOES 6
                     39: #define DOESJUMP       7
1.6       benschop   40: 
1.1       anton      41: #include "machine.h"
                     42: 
                     43: /* Forth data types */
1.21      anton      44: /* Cell and UCell must be the same size as a pointer */
                     45: typedef CELL_TYPE Cell;
                     46: typedef unsigned CELL_TYPE UCell;
                     47: #define CELL_BITS      (sizeof(Cell) * CHAR_BIT)
1.20      pazsan     48: typedef Cell Bool;
1.1       anton      49: #define FLAG(b) (-(b))
1.5       pazsan     50: #define FILEIO(error)  (FLAG(error) & -37)
                     51: #define FILEEXIST(error)       (FLAG(error) & -38)
1.1       anton      52: 
                     53: #define F_TRUE (FLAG(0==0))
                     54: #define F_FALSE (FLAG(0!=0))
                     55: 
                     56: typedef unsigned char Char;
                     57: typedef double Float;
                     58: typedef char *Address;
                     59: 
1.21      anton      60: #ifdef BUGGY_LONG_LONG
                     61: typedef struct {
                     62:   Cell hi;
                     63:   UCell lo;
                     64: } DCell;
                     65: 
                     66: typedef struct {
                     67:   UCell hi;
                     68:   UCell lo;
                     69: } UDCell;
                     70: 
                     71: #define FETCH_DCELL(d,lo,hi)   ((d)=(typeof(d)){(hi),(lo)})
                     72: #define STORE_DCELL(d,low,high)        ({ \
                     73:                                     typeof(d) _d = (d); \
                     74:                                     (low) = _d.lo; \
                     75:                                     (high)= _d.hi; \
                     76:                                 })
                     77: 
                     78: #define LONG2UD(l)     ({UDCell _ud; _ud.hi=0; _ud.lo=(Cell)(l); _ud;})
                     79: #define UD2LONG(ud)    ((long)(ud.lo))
                     80: #define DZERO          ((DCell){0,0})
                     81: 
                     82: #else /* ! defined(BUGGY_LONG_LONG) */
                     83: 
                     84: /* DCell and UDCell must be twice as large as Cell */
                     85: typedef DOUBLE_CELL_TYPE DCell;
                     86: typedef unsigned DOUBLE_CELL_TYPE UDCell;
                     87: 
                     88: typedef union {
                     89:   struct {
                     90: #ifdef WORDS_BIGENDIAN
                     91:     Cell high;
                     92:     UCell low;
                     93: #else
                     94:     UCell low;
                     95:     Cell high;
                     96: #endif;
                     97:   } cells;
                     98:   DCell dcell;
                     99: } Double_Store;
                    100: 
                    101: #define FETCH_DCELL(d,lo,hi)   ({ \
                    102:                                     Double_Store _d; \
                    103:                                     _d.cells.low = (lo); \
                    104:                                     _d.cells.high = (hi); \
                    105:                                     (d) = _d.dcell; \
                    106:                                 })
                    107: 
                    108: #define STORE_DCELL(d,lo,hi)   ({ \
                    109:                                     Double_Store _d; \
                    110:                                     _d.dcell = (d); \
                    111:                                     (lo) = _d.cells.low; \
                    112:                                     (hi) = _d.cells.high; \
                    113:                                 })
                    114: 
                    115: #define LONG2UD(l)     ((UDCell)(l))
                    116: #define UD2LONG(ud)    ((long)(ud))
                    117: #define DZERO          ((DCell)0)
                    118: 
                    119: #endif /* ! defined(BUGGY_LONG_LONG) */
                    120: 
1.1       anton     121: #ifdef DIRECT_THREADED
                    122: typedef Label Xt;
                    123: #else
                    124: typedef Label *Xt;
                    125: #endif
                    126: 
                    127: #ifndef DIRECT_THREADED
                    128: /* i.e. indirect threaded */
                    129: /* the direct threaded version is machine dependent and resides in machine.h */
                    130: 
                    131: /* PFA gives the parameter field address corresponding to a cfa */
                    132: #define PFA(cfa)       (((Cell *)cfa)+2)
                    133: /* PFA1 is a special version for use just after a NEXT1 */
                    134: #define PFA1(cfa)      PFA(cfa)
                    135: /* CODE_ADDRESS is the address of the code jumped to through the code field */
                    136: #define CODE_ADDRESS(cfa)      (*(Label *)(cfa))
1.25      anton     137: /* DOES_CODE is the Forth code does jumps to */
1.24      anton     138: #define DOES_CODE(cfa) ({Xt _cfa=(Xt)(cfa); \
                    139:                          _cfa[0] == symbols[DODOES] ? _cfa[1] : NULL;})
                    140: #define DOES_CODE1(cfa)        (cfa[1])
1.1       anton     141: /* MAKE_CF creates an appropriate code field at the cfa;
                    142:    ca is the code address */
                    143: #define MAKE_CF(cfa,ca) ((*(Label *)(cfa)) = ((Label)ca))
                    144: /* make a code field for a defining-word-defined word */
1.2       pazsan    145: #define MAKE_DOES_CF(cfa,does_code)    ({MAKE_CF(cfa,symbols[DODOES]); \
1.1       anton     146:                                          ((Cell *)cfa)[1] = (Cell)does_code;})
                    147: /* the does handler resides between DOES> and the following Forth code */
1.13      pazsan    148: #define DOES_HANDLER_SIZE      (2*sizeof(Cell))
1.1       anton     149: #define MAKE_DOES_HANDLER(addr)        0 /* do nothing */
1.21      anton     150: #endif /* !defined(DIRECT_THREADED) */
1.1       anton     151: 
                    152: #ifdef DEBUG
1.18      pazsan    153: #      define  NAME(string)    fprintf(stderr,"%08lx: "string"\n",(Cell)ip);
1.1       anton     154: #else
                    155: #      define  NAME(string)
                    156: #endif
1.2       pazsan    157: 
                    158: #define CF(const)      (-const-2)
                    159: 
                    160: #define CF_NIL -1
1.3       pazsan    161: 
1.15      anton     162: #ifndef FLUSH_ICACHE
1.16      anton     163: #warning flush-icache probably will not work (see manual)
1.17      pazsan    164: #      define FLUSH_ICACHE(addr,size)
1.15      anton     165: #endif
                    166: 
                    167: #ifdef DIRECT_THREADED
                    168: #define CACHE_FLUSH(addr,size) FLUSH_ICACHE(addr,size)
                    169: #else
1.17      pazsan    170: #define CACHE_FLUSH(addr,size)
1.3       pazsan    171: #endif
1.21      anton     172: 
1.27    ! anton     173: #ifdef USE_TOS
        !           174: #define IF_TOS(x) x
        !           175: #else
        !           176: #define IF_TOS(x)
        !           177: #define TOS (sp[0])
        !           178: #endif
        !           179: 
        !           180: #ifdef USE_FTOS
        !           181: #define IF_FTOS(x) x
        !           182: #else
        !           183: #define IF_FTOS(x)
        !           184: #define FTOS (fp[0])
        !           185: #endif
        !           186: 
1.21      anton     187: Label *engine(Xt *ip, Cell *sp, Cell *rp, Float *fp, Address lp);
                    188: 
                    189: /* dblsub routines */
                    190: DCell dnegate(DCell d1);
                    191: UDCell ummul (UCell a, UCell b);
                    192: DCell mmul (Cell a, Cell b);
                    193: UDCell umdiv (UDCell u, UCell v);
                    194: DCell smdiv (DCell num, Cell denom);
                    195: DCell fmdiv (DCell num, Cell denom);
                    196: 
1.22      anton     197: int memcasecmp(const char *s1, const char *s2, long n);
                    198: 

FreeBSD-CVSweb <freebsd-cvsweb@FreeBSD.org>