1: /*
2: $Id: 386.h,v 1.1 1994/02/11 16:30:45 anton Exp $
3: Copyright 1992 by the ANSI figForth Development Group
4:
5: This is the machine-specific part for Intel 386 compatible processors
6: */
7:
8:
9: /* Cell and UCell must be the same size as a pointer */
10: typedef long Cell;
11: typedef unsigned long UCell;
12:
13: /* DCell and UDCell must be twice as large as Cell */
14: typedef long long DCell;
15: typedef unsigned long long UDCell;
16:
17: /* define this if IEEE singles and doubles are available as C data types */
18: #define IEEE_FP
19:
20: /* the IEEE types are used only for loading and storing */
21: /* the IEEE double precision type */
22: typedef double DFloat;
23: /* the IEEE single precision type */
24: typedef float SFloat;
25:
26: /* define this if the least-significant byte is at the largets address */
27: /* #define BIG_ENDIAN */
28:
29: #ifdef DIRECT_THREADED
30: /* PFA gives the parameter field address corresponding to a cfa */
31: #define PFA(cfa) (((Cell *)cfa)+2)
32: /* PFA1 is a special version for use just after a NEXT1 */
33: #define PFA1(cfa) PFA(cfa)
34: /* CODE_ADDRESS is the address of the code jumped to through the code field */
35: #define CODE_ADDRESS(cfa) ({long _cfa = (char *)(cfa); (Label)(_cfa+*((long *)(_cfa+1))-5);})
36: /* MAKE_CF creates an appropriate code field at the cfa; ca is the code address */
37: #define MAKE_CF(cfa,ca) ({long _cfa = (long *)(cfa); \
38: *(char *)_cfa = 0xe9; /* jmp */ \
39: *(long *)(_cfa+1) = ((long)(ca))-(_cfa+5);})
40:
41: /* this is the point where the does code starts if label points to the
42: * jump dodoes */
43: #define DOES_CODE(label) ((Xt *)(((char *)label)+8))
44:
45: /* this is a special version of DOES_CODE for use in dodoes */
46: #define DOES_CODE1(label) DOES_CODE(label)
47:
48: /* this stores a jump dodoes at addr */
49: #define MAKE_DOESJUMP(addr) ({long _addr = (long *)(addr); \
50: *(char *)_addr = 0xe9; /* jmp */ \
51: *(long *)(_addr+1) = ((long)(&&dodoes))-(_addr+5);})
52: #endif
53:
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