Annotation of gforth/engine/forth.h, revision 1.8

1.1       anton       1: /* common header file
                      2: 
1.8     ! anton       3:   Copyright (C) 1995,1996,1997,1998 Free Software Foundation, Inc.
1.1       anton       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.
                     20: */
                     21: 
                     22: #include "config.h"
                     23: 
                     24: #if defined(DOUBLY_INDIRECT)
                     25: #  undef DIRECT_THREADED
                     26: #  undef INDIRECT_THREADED
                     27: #  define INDIRECT_THREADED
                     28: #endif
                     29: 
                     30: #include <limits.h>
                     31: 
                     32: #if defined(NeXT)
                     33: #  include <libc.h>
                     34: #endif /* NeXT */
                     35: 
                     36: /* symbol indexed constants */
                     37: 
                     38: #define DOCOL  0
                     39: #define DOCON  1
                     40: #define DOVAR  2
                     41: #define DOUSER 3
                     42: #define DODEFER        4
                     43: #define DOFIELD        5
                     44: #define DODOES 6
                     45: #define DOESJUMP       7
                     46: 
                     47: /* the size of the DOESJUMP, which resides between DOES> and the does-code */
                     48: #define DOES_HANDLER_SIZE      (2*sizeof(Cell))
                     49: 
1.6       jwilke     50: #include "machine.h"
1.1       anton      51: 
                     52: /* Forth data types */
                     53: /* Cell and UCell must be the same size as a pointer */
                     54: #define CELL_BITS      (sizeof(Cell) * CHAR_BIT)
                     55: #define FLAG(b) (-(b))
                     56: #define FILEIO(error)  (FLAG(error) & -37)
                     57: #define FILEEXIST(error)       (FLAG(error) & -38)
                     58: 
                     59: #define F_TRUE (FLAG(0==0))
                     60: #define F_FALSE (FLAG(0!=0))
                     61: 
                     62: #ifdef BUGGY_LONG_LONG
                     63: typedef struct {
                     64:   Cell hi;
                     65:   UCell lo;
                     66: } DCell;
                     67: 
                     68: typedef struct {
                     69:   UCell hi;
                     70:   UCell lo;
                     71: } UDCell;
                     72: 
                     73: #define FETCH_DCELL(d,lo,hi)   ((d)=(typeof(d)){(hi),(lo)})
                     74: #define STORE_DCELL(d,low,high)        ({ \
                     75:                                     typeof(d) _d = (d); \
                     76:                                     (low) = _d.lo; \
                     77:                                     (high)= _d.hi; \
                     78:                                 })
                     79: 
                     80: #define LONG2UD(l)     ({UDCell _ud; _ud.hi=0; _ud.lo=(Cell)(l); _ud;})
                     81: #define UD2LONG(ud)    ((long)(ud.lo))
                     82: #define DZERO          ((DCell){0,0})
                     83: 
                     84: #else /* ! defined(BUGGY_LONG_LONG) */
                     85: 
                     86: /* DCell and UDCell must be twice as large as Cell */
                     87: typedef DOUBLE_CELL_TYPE DCell;
                     88: typedef unsigned DOUBLE_CELL_TYPE UDCell;
                     89: 
                     90: typedef union {
                     91:   struct {
                     92: #ifdef WORDS_BIGENDIAN
                     93:     Cell high;
                     94:     UCell low;
                     95: #else
                     96:     UCell low;
                     97:     Cell high;
                     98: #endif;
                     99:   } cells;
                    100:   DCell dcell;
                    101: } Double_Store;
                    102: 
                    103: #define FETCH_DCELL(d,lo,hi)   ({ \
                    104:                                     Double_Store _d; \
                    105:                                     _d.cells.low = (lo); \
                    106:                                     _d.cells.high = (hi); \
                    107:                                     (d) = _d.dcell; \
                    108:                                 })
                    109: 
                    110: #define STORE_DCELL(d,lo,hi)   ({ \
                    111:                                     Double_Store _d; \
                    112:                                     _d.dcell = (d); \
                    113:                                     (lo) = _d.cells.low; \
                    114:                                     (hi) = _d.cells.high; \
                    115:                                 })
                    116: 
                    117: #define LONG2UD(l)     ((UDCell)(l))
                    118: #define UD2LONG(ud)    ((long)(ud))
                    119: #define DZERO          ((DCell)0)
                    120: 
                    121: #endif /* ! defined(BUGGY_LONG_LONG) */
                    122: 
                    123: #ifdef DIRECT_THREADED
                    124: typedef Label Xt;
                    125: #else
                    126: typedef Label *Xt;
                    127: #endif
                    128: 
                    129: 
                    130: #if !defined(DIRECT_THREADED)
                    131: /* i.e. indirect threaded our doubly indirect threaded */
                    132: /* the direct threaded version is machine dependent and resides in machine.h */
                    133: 
                    134: /* PFA gives the parameter field address corresponding to a cfa */
                    135: #define PFA(cfa)       (((Cell *)cfa)+2)
                    136: /* PFA1 is a special version for use just after a NEXT1 */
                    137: #define PFA1(cfa)      PFA(cfa)
                    138: /* CODE_ADDRESS is the address of the code jumped to through the code field */
                    139: #define CODE_ADDRESS(cfa)      (*(Xt)(cfa))
                    140: 
                    141: /* DOES_CODE is the Forth code does jumps to */
                    142: #if !defined(DOUBLY_INDIRECT)
                    143: #  define DOES_CA (symbols[DODOES])
                    144: #else /* defined(DOUBLY_INDIRECT) */
                    145: #  define DOES_CA ((Label)&symbols[DODOES])
                    146: #endif /* defined(DOUBLY_INDIRECT) */
                    147: 
                    148: 
                    149: 
                    150: #define DOES_CODE(cfa) ({Xt _cfa=(Xt)(cfa); \
                    151:                          (Xt *)(_cfa[0]==DOES_CA ? _cfa[1] : NULL);})
                    152: #define DOES_CODE1(cfa)        ((Xt *)(cfa[1]))
                    153: /* MAKE_CF creates an appropriate code field at the cfa;
                    154:    ca is the code address */
                    155: #define MAKE_CF(cfa,ca) ((*(Label *)(cfa)) = ((Label)ca))
                    156: /* make a code field for a defining-word-defined word */
                    157: #define MAKE_DOES_CF(cfa,does_code)  ({MAKE_CF(cfa,DOES_CA);   \
                    158:                                       ((Cell *)cfa)[1] = (Cell)(does_code);})
                    159: /* the does handler resides between DOES> and the following Forth code */
                    160: /* not needed in indirect threaded code */
                    161: #if defined(DOUBLY_INDIRECT)
                    162: #define MAKE_DOES_HANDLER(addr)        MAKE_CF(addr, ((Label)&symbols[DOESJUMP]))
                    163: #else /* !defined(DOUBLY_INDIRECT) */
                    164: #define MAKE_DOES_HANDLER(addr)        0
                    165: #endif /* !defined(DOUBLY_INDIRECT) */
                    166: #endif /* !defined(DIRECT_THREADED) */
                    167: 
                    168: #ifdef DEBUG
                    169: #      define  NAME(string)    fprintf(stderr,"%08lx: "string"\n",(Cell)ip);
                    170: #else
                    171: #      define  NAME(string)
                    172: #endif
                    173: 
                    174: #define CF(const)      (-const-2)
                    175: 
                    176: #define CF_NIL -1
                    177: 
                    178: #ifndef FLUSH_ICACHE
                    179: #warning flush-icache probably will not work (see manual)
                    180: #      define FLUSH_ICACHE(addr,size)
                    181: #endif
                    182: 
                    183: #if defined(DIRECT_THREADED)
                    184: #define CACHE_FLUSH(addr,size) FLUSH_ICACHE(addr,size)
                    185: #else
                    186: #define CACHE_FLUSH(addr,size)
                    187: #endif
                    188: 
                    189: #ifdef USE_TOS
                    190: #define IF_TOS(x) x
                    191: #else
                    192: #define IF_TOS(x)
                    193: #define TOS (sp[0])
                    194: #endif
                    195: 
                    196: #ifdef USE_FTOS
                    197: #define IF_FTOS(x) x
                    198: #else
                    199: #define IF_FTOS(x)
                    200: #define FTOS (fp[0])
                    201: #endif
                    202: 
                    203: Label *engine(Xt *ip, Cell *sp, Cell *rp, Float *fp, Address lp);
                    204: Address my_alloc(Cell size);
                    205: 
                    206: /* dblsub routines */
                    207: DCell dnegate(DCell d1);
                    208: UDCell ummul (UCell a, UCell b);
                    209: DCell mmul (Cell a, Cell b);
                    210: UDCell umdiv (UDCell u, UCell v);
                    211: DCell smdiv (DCell num, Cell denom);
                    212: DCell fmdiv (DCell num, Cell denom);
                    213: 
1.7       pazsan    214: Cell memcasecmp(const Char *s1, const Char *s2, Cell n);
1.1       anton     215: 
                    216: extern int offset_image;
1.5       anton     217: extern int die_on_signal;
1.2       pazsan    218: 
                    219: /* declare all the functions that are missing */
                    220: #ifndef HAVE_ATANH
                    221: extern double atanh(double r1);
                    222: extern double asinh(double r1);
                    223: extern double acosh(double r1);
                    224: #endif
                    225: #ifndef HAVE_ECVT
1.4       anton     226: /* extern char* ecvt(double x, int len, int* exp, int* sign);*/
1.2       pazsan    227: #endif
                    228: #ifndef HAVE_MEMMOVE
1.3       anton     229: /* extern char *memmove(char *dest, const char *src, long n); */
1.2       pazsan    230: #endif
                    231: #ifndef HAVE_POW10
                    232: extern double pow10(double x);
                    233: #endif
                    234: #ifndef HAVE_STRERROR
                    235: extern char *strerror(int err);
                    236: #endif
                    237: #ifndef HAVE_STRSIGNAL
                    238: extern char *strsignal(int sig);
                    239: #endif
                    240: #ifndef HAVE_STRTOUL
1.3       anton     241: extern unsigned long int strtoul(const char *nptr, char **endptr, int base);
1.2       pazsan    242: #endif
                    243: 
                    244: 

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