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[gforth] /
gforth /
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forth.h
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1.4:
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Sat May 7 14:55:51 1994 UTC (29 years, 10 months ago) by
anton
Branches:
MAIN
CVS tags:
HEAD
local variables
rewrote primitives2c.el in Forth (prims2x.el)
various small changes
Added Files:
from-cut-here gforth.el gforth.texi glocals.fs gray.fs
locals-test.fs prims2x.fs
1: /*
2: $Id: forth.h,v 1.4 1994/05/07 14:55:51 anton Exp $
3: Copyright 1992 by the ANSI figForth Development Group
4: */
5:
6: /* common header file */
7:
8: typedef void *Label;
9:
10: /* symbol indexed constants */
11:
12: #define DOCOL 0
13: #define DOCON 1
14: #define DOVAR 2
15: #define DOUSER 3
16: #define DODOES 4
17: #define DOESJUMP 5
18:
19: #include "machine.h"
20:
21: /* Forth data types */
22: typedef int Bool;
23: #define FLAG(b) (-(b))
24:
25: #define F_TRUE (FLAG(0==0))
26: #define F_FALSE (FLAG(0!=0))
27:
28: typedef unsigned char Char;
29: typedef double Float;
30: typedef char *Address;
31:
32: #ifdef DIRECT_THREADED
33: typedef Label Xt;
34: #else
35: typedef Label *Xt;
36: #endif
37:
38: Label *engine(Xt *ip, Cell *sp, Cell *rp, Float *fp, Address lp);
39:
40: #ifndef DIRECT_THREADED
41: /* i.e. indirect threaded */
42: /* the direct threaded version is machine dependent and resides in machine.h */
43:
44: /* PFA gives the parameter field address corresponding to a cfa */
45: #define PFA(cfa) (((Cell *)cfa)+2)
46: /* PFA1 is a special version for use just after a NEXT1 */
47: #define PFA1(cfa) PFA(cfa)
48: /* CODE_ADDRESS is the address of the code jumped to through the code field */
49: #define CODE_ADDRESS(cfa) (*(Label *)(cfa))
50: /* DOES_CODE is the Forth code does jumps to */
51: #define DOES_CODE(cfa) (cfa[1])
52: #define DOES_CODE1(cfa) DOES_CODE(cfa)
53: /* MAKE_CF creates an appropriate code field at the cfa;
54: ca is the code address */
55: #define MAKE_CF(cfa,ca) ((*(Label *)(cfa)) = ((Label)ca))
56: /* make a code field for a defining-word-defined word */
57: #define MAKE_DOES_CF(cfa,does_code) ({MAKE_CF(cfa,symbols[DODOES]); \
58: ((Cell *)cfa)[1] = (Cell)does_code;})
59: /* the does handler resides between DOES> and the following Forth code */
60: #define DOES_HANDLER_SIZE 8
61: #define MAKE_DOES_HANDLER(addr) 0 /* do nothing */
62: #endif
63:
64: #ifdef DEBUG
65: # define NAME(string) printf("%08x: %s\n",(int)ip,string);
66: #else
67: # define NAME(string)
68: #endif
69:
70: #define CF(const) (-const-2)
71:
72: #define CF_NIL -1
73:
74: #ifndef CACHE_FLUSH
75: # define CACHE_FLUSH(addr,size)
76: #endif
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