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Annotation of gforth/apollo68k.h, revision 1.1

1.1     ! anton       1: /*
        !             2:   $Id: apollo68k.h,v 1.3 1993/02/11 15:57:33 anton Exp $
        !             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: #endif
        !            43: 
        !            44: /* this is the point where the does code starts if label points to the
        !            45:  * jump dodoes */
        !            46: #define DOES_CODE(label)       ((Xt *)(((char *)label)+8))
        !            47: 
        !            48: /* this is a special version of DOES_CODE for use in dodoes */
        !            49: #define DOES_CODE1(label)      DOES_CODE(label)
        !            50: 
        !            51: /* this stores a jump dodoes at ca */
        !            52: #define MAKE_DOESJUMP(ca)      ({short * _ca = (short *)ca; \
        !            53:                                  _ca[0] = 0x4ef9; /* jmp.l */ \
        !            54:                                  *(long *)(_ca+1) = (long)&&dodoes;})