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Annotation of gforth/m68k.h, revision 1.1

1.1     ! anton       1: /*
        !             2:   $Id: apollo68k.h,v 1.2 1994/05/31 07:08:10 benschop Exp $
        !             3:   Copyright 1992 by the ANSI figForth Development Group
        !             4: 
        !             5:   This is the machine-specific part for the 68000 and family
        !             6: */
        !             7: 
        !             8: #include "32bit.h"
        !             9: 
        !            10: #ifdef DIRECT_THREADED
        !            11: /* PFA gives the parameter field address corresponding to a cfa */
        !            12: #define PFA(cfa)       (((Cell *)cfa)+2)
        !            13: /* PFA1 is a special version for use just after a NEXT1 */
        !            14: #define PFA1(cfa)      PFA(cfa)
        !            15: /* CODE_ADDRESS is the address of the code jumped to through the code field */
        !            16: #define CODE_ADDRESS(cfa)      (*(Label *)(((char *)(cfa))+2))
        !            17: /* MAKE_CF creates an appropriate code field at the cfa;
        !            18:    ca is the code address */
        !            19: #define MAKE_CF(cfa,ca)                ({short * _cfa = (short *)cfa; \
        !            20:                                  _cfa[0] = 0x4ef9; /* jmp.l */ \
        !            21:                                  *(long *)(_cfa+1) = (long)(ca);})
        !            22: 
        !            23: /* this is the point where the does code starts if label points to the
        !            24:  * jump dodoes */
        !            25: #define DOES_CODE(label)       ((Xt *)(((char *)label)+8))
        !            26: 
        !            27: /* this is a special version of DOES_CODE for use in dodoes */
        !            28: #define DOES_CODE1(label)      DOES_CODE(label)
        !            29: 
        !            30: /* this stores a jump dodoes at ca */
        !            31: #define MAKE_DOESJUMP(ca)      ({short * _ca = (short *)ca; \
        !            32:                                  _ca[0] = 0x4ef9; /* jmp.l */ \
        !            33:                                  *(long *)(_ca+1) = (long)&&dodoes;})
        !            34: #endif
        !            35: