File:  [gforth] / gforth / Attic / m68k.h
Revision 1.2: download - view: text, annotated - select for diffs
Wed Jan 18 18:41:41 1995 UTC (26 years, 10 months ago) by anton
Branches: MAIN
CVS tags: HEAD
worked a bit on m68k.h and power.h
moved hyperbolic functions and falog to primitives

    1: /*
    2:   $Id: m68k.h,v 1.2 1995/01/18 18:41:41 anton 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: 
   12: #define CACHE_FLUSH(addr,size)    cache_$clear()
   13: /* Clearing the whole cache is a bit drastic, but this is the only
   14:    cache control available on the apollo.
   15: */
   16: 
   17: /* PFA gives the parameter field address corresponding to a cfa */
   18: #define PFA(cfa)	(((Cell *)cfa)+2)
   19: /* PFA1 is a special version for use just after a NEXT1 */
   20: #define PFA1(cfa)	PFA(cfa)
   21: /* CODE_ADDRESS is the address of the code jumped to through the code field */
   22: #define CODE_ADDRESS(cfa)	(*(Label *)(((char *)(cfa))+2))
   23: /* MAKE_CF creates an appropriate code field at the cfa;
   24:    ca is the code address */
   25: #define MAKE_CF(cfa,ca)		({short * _cfa = (short *)cfa; \
   26: 				  _cfa[0] = 0x4ef9; /* jmp.l */ \
   27: 				  *(long *)(_cfa+1) = (long)(ca);})
   28: 
   29: /* this is the point where the does code starts if label points to the
   30:  * jump dodoes */
   31: #define DOES_CODE(label)	((Xt *)(((char *)CODE_ADDRESS(label))+DOES_HANDLER_SIZE))
   32: 
   33: /* this is a special version of DOES_CODE for use in dodoes */
   34: #define DOES_CODE1(label)	DOES_CODE(label)
   35: 
   36: /* this stores a call dodoes at addr */
   37: #define MAKE_DOES_HANDLER(addr) MAKE_CF(addr,symbols[DODOES])
   38: 
   39: #define DOES_HANDLER_SIZE       8
   40: 
   41: #define MAKE_DOES_CF(addr,doesp)   MAKE_CF(addr,((int)(doesp)-8))
   42: #endif
   43: 

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