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Annotation of gforth/apollo68k.h, revision 1.2

1.1       anton       1: /*
1.2     ! benschop    2:   $Id: apollo68k.h,v 1.1.1.1 1994/02/11 16:30:46 anton Exp $
1.1       anton       3:   Copyright 1992 by the ANSI figForth Development Group
                      4: 
                      5:   This is the machine-specific part for a HP/Apollo with a 680x0
                      6:   processor running Domain/OS
                      7: */
                      8: 
                      9: 
                     10: /* Cell and UCell must be the same size as a pointer */
                     11: typedef long Cell;
                     12: typedef unsigned long UCell;
                     13: 
                     14: /* DCell and UDCell must be twice as large as Cell */
                     15: typedef long long DCell;
                     16: typedef unsigned long long UDCell;
                     17: 
                     18: /* define this if IEEE singles and doubles are available as C data types */
                     19: #define IEEE_FP
                     20: 
                     21: /* the IEEE types are used only for loading and storing */
                     22: /* the IEEE double precision type */
                     23: typedef double DFloat;
                     24: /* the IEEE single precision type */
                     25: typedef float SFloat;
                     26: 
                     27: /* define this if the least-significant byte is at the largets address */
                     28: #define BIG_ENDIAN
                     29: 
                     30: #ifdef DIRECT_THREADED
                     31: /* PFA gives the parameter field address corresponding to a cfa */
                     32: #define PFA(cfa)       (((Cell *)cfa)+2)
                     33: /* PFA1 is a special version for use just after a NEXT1 */
                     34: #define PFA1(cfa)      PFA(cfa)
                     35: /* CODE_ADDRESS is the address of the code jumped to through the code field */
                     36: #define CODE_ADDRESS(cfa)      (*(Label *)(((char *)(cfa))+2))
                     37: /* MAKE_CF creates an appropriate code field at the cfa;
                     38:    ca is the code address */
                     39: #define MAKE_CF(cfa,ca)                ({short * _cfa = (short *)cfa; \
                     40:                                  _cfa[0] = 0x4ef9; /* jmp.l */ \
                     41:                                  *(long *)(_cfa+1) = (long)(ca);})
                     42: 
                     43: /* this is the point where the does code starts if label points to the
                     44:  * jump dodoes */
                     45: #define DOES_CODE(label)       ((Xt *)(((char *)label)+8))
                     46: 
                     47: /* this is a special version of DOES_CODE for use in dodoes */
                     48: #define DOES_CODE1(label)      DOES_CODE(label)
                     49: 
                     50: /* this stores a jump dodoes at ca */
                     51: #define MAKE_DOESJUMP(ca)      ({short * _ca = (short *)ca; \
                     52:                                  _ca[0] = 0x4ef9; /* jmp.l */ \
                     53:                                  *(long *)(_ca+1) = (long)&&dodoes;})
1.2     ! benschop   54: #endif
        !            55: