Annotation of gforth/threading.h, revision 1.2
1.1 pazsan 1: /* This file defines a number of threading schemes.
1.2 ! anton 2:
! 3: Copyright (C) 1995 Free Software Foundation, Inc.
! 4:
! 5: This file is part of Gforth.
! 6:
! 7: Gforth is free software; you can redistribute it and/or
! 8: modify it under the terms of the GNU General Public License
! 9: as published by the Free Software Foundation; either version 2
! 10: of the License, or (at your option) any later version.
! 11:
! 12: This program is distributed in the hope that it will be useful,
! 13: but WITHOUT ANY WARRANTY; without even the implied warranty of
! 14: MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
! 15: GNU General Public License for more details.
! 16:
! 17: You should have received a copy of the GNU General Public License
! 18: along with this program; if not, write to the Free Software
! 19: Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
! 20:
! 21:
! 22: To organize the former ifdef chaos, each path is separated
! 23: This gives a quite impressive number of paths, but you clearly
! 24: find things that go together.
! 25: */
1.1 pazsan 26:
27: #ifndef GETCFA
28: # define CFA_NEXT
29: #endif
30:
31: #if defined(DIRECT_THREADED) && defined(AUTO_INCREMENT)\
32: && defined(LONG_LATENCY) && defined(CFA_NEXT)
33: #warning scheme 1
34: # define NEXT_P0 ({cfa=*ip++;})
35: # define IP (ip-1)
36: # define NEXT_INST (cfa)
37: # define INC_IP(const_inc) ({cfa=IP[const_inc]; ip+=(const_inc);})
38: # define DEF_CA
39: # define NEXT_P1
40: # define NEXT_P2 ({goto *cfa;})
41: # define EXEC(XT) ({cfa=(XT); goto *cfa;})
42: #endif
43:
44: #if defined(DIRECT_THREADED) && defined(AUTO_INCREMENT)\
45: && defined(LONG_LATENCY) && !defined(CFA_NEXT)
46: #warning scheme 2
47: # define NEXT_P0 (ip++)
48: # define IP (ip-1)
49: # define NEXT_INST (*(ip-1))
50: # define INC_IP(const_inc) ({ ip+=(const_inc);})
51: # define DEF_CA
52: # define NEXT_P1
53: # define NEXT_P2 ({goto **(ip-1);})
54: # define EXEC(XT) ({goto *(XT);})
55: #endif
56:
57:
58: #if defined(DIRECT_THREADED) && defined(AUTO_INCREMENT)\
59: && !defined(LONG_LATENCY) && defined(CFA_NEXT)
60: #warning scheme 3
61: # define NEXT_P0
62: # define IP (ip)
63: # define NEXT_INST (*ip)
64: # define INC_IP(const_inc) ({ip+=(const_inc);})
65: # define DEF_CA
66: # define NEXT_P1 ({cfa=*ip++;})
67: # define NEXT_P2 ({goto *cfa;})
68: # define EXEC(XT) ({cfa=(XT); goto *cfa;})
69: #endif
70:
71: #if defined(DIRECT_THREADED) && defined(AUTO_INCREMENT)\
72: && !defined(LONG_LATENCY) && !defined(CFA_NEXT)
73: #warning scheme 4
74: # define NEXT_P0
75: # define IP (ip)
76: # define NEXT_INST (*ip)
77: # define INC_IP(const_inc) ({ ip+=(const_inc);})
78: # define DEF_CA
79: # define NEXT_P1
80: # define NEXT_P2 ({goto **(ip++);})
81: # define EXEC(XT) ({goto *(XT);})
82: #endif
83:
84: /* without autoincrement */
85:
86: #if defined(DIRECT_THREADED) && !defined(AUTO_INCREMENT)\
87: && defined(LONG_LATENCY) && defined(CFA_NEXT)
88: #warning scheme 5
89: # define NEXT_P0 ({cfa=*ip;})
90: # define IP (ip)
91: # define NEXT_INST (cfa)
92: # define INC_IP(const_inc) ({cfa=IP[const_inc]; ip+=(const_inc);})
93: # define DEF_CA
94: # define NEXT_P1 (ip++)
95: # define NEXT_P2 ({goto *cfa;})
96: # define EXEC(XT) ({cfa=(XT); goto *cfa;})
97: #endif
98:
99: #if defined(DIRECT_THREADED) && !defined(AUTO_INCREMENT)\
100: && defined(LONG_LATENCY) && !defined(CFA_NEXT)
101: #warning scheme 6
102: # define NEXT_P0
103: # define IP (ip)
104: # define NEXT_INST (*ip)
1.2 ! anton 105: # define INC_IP(const_inc) ({ip+=(const_inc);})
1.1 pazsan 106: # define DEF_CA
107: # define NEXT_P1 (ip++)
108: # define NEXT_P2 ({goto **(ip-1);})
109: # define EXEC(XT) ({goto *(XT);})
110: #endif
111:
112:
113: #if defined(DIRECT_THREADED) && !defined(AUTO_INCREMENT)\
114: && !defined(LONG_LATENCY) && defined(CFA_NEXT)
115: #warning scheme 7
116: # define NEXT_P0
117: # define IP (ip)
118: # define NEXT_INST (*ip)
119: # define INC_IP(const_inc) ({ip+=(const_inc);})
120: # define DEF_CA
121: # define NEXT_P1 ({cfa=*ip++;})
122: # define NEXT_P2 ({goto *cfa;})
123: # define EXEC(XT) ({cfa=(XT); goto *cfa;})
124: #endif
125:
126: #if defined(DIRECT_THREADED) && !defined(AUTO_INCREMENT)\
127: && !defined(LONG_LATENCY) && !defined(CFA_NEXT)
128: #warning scheme 8
129: # define NEXT_P0
130: # define IP (ip)
131: # define NEXT_INST (*IP)
132: # define INC_IP(const_inc) ({ ip+=(const_inc);})
133: # define DEF_CA
134: # define NEXT_P1 (ip++)
135: # define NEXT_P2 ({goto **(ip-1);})
136: # define EXEC(XT) ({goto *(XT);})
137: #endif
138:
139: /* common settings for direct THREADED */
140:
141:
142: /* indirect THREADED */
143:
144: #if !defined(DIRECT_THREADED) && defined(AUTO_INCREMENT)\
145: && defined(LONG_LATENCY) && defined(CISC_NEXT)
146: # define NEXT_P0 ({cfa=*ip++;})
147: # define IP (ip-1)
148: # define NEXT_INST (cfa)
149: # define INC_IP(const_inc) ({cfa=IP[const_inc]; ip+=(const_inc);})
150: # define DEF_CA
151: # define NEXT_P1
152: # define NEXT_P2 ({goto **cfa;})
153: # define EXEC(XT) ({cfa=(XT); goto **cfa;})
154: #endif
155:
156: #if !defined(DIRECT_THREADED) && defined(AUTO_INCREMENT)\
157: && defined(LONG_LATENCY) && !defined(CISC_NEXT)
158: # define NEXT_P0 ({cfa=*ip++;})
159: # define IP (ip-1)
160: # define NEXT_INST (cfa)
161: # define INC_IP(const_inc) ({cfa=IP[const_inc]; ip+=(const_inc);})
162: # define DEF_CA Label ca;
163: # define NEXT_P1 ({ca=*cfa;})
164: # define NEXT_P2 ({goto *ca;})
165: # define EXEC(XT) ({DEF_CA cfa=(XT); ca=*cfa; goto *ca;})
166: #endif
167:
168:
169: #if !defined(DIRECT_THREADED) && defined(AUTO_INCREMENT)\
170: && !defined(LONG_LATENCY) && defined(CISC_NEXT)
171: # define NEXT_P0
172: # define IP (ip)
173: # define NEXT_INST (*ip)
174: # define INC_IP(const_inc) ({ip+=(const_inc);})
175: # define DEF_CA
176: # define NEXT_P1 ({cfa=*ip++;})
177: # define NEXT_P2 ({goto **cfa;})
178: # define EXEC(XT) ({cfa=(XT); goto **cfa;})
179: #endif
180:
181: #if !defined(DIRECT_THREADED) && defined(AUTO_INCREMENT)\
182: && !defined(LONG_LATENCY) && !defined(CISC_NEXT)
183: # define NEXT_P0 ({cfa=*ip++;})
184: # define IP (ip-1)
185: # define NEXT_INST (cfa)
186: # define INC_IP(const_inc) ({cfa=IP[const_inc]; ip+=(const_inc);})
187: # define DEF_CA Label ca;
188: # define NEXT_P1 ({ca=*cfa;})
189: # define NEXT_P2 ({goto *ca;})
190: # define EXEC(XT) ({DEF_CA cfa=(XT); ca=*cfa; goto *ca;})
191: #endif
192:
193:
194: /* without autoincrement */
195:
196: #if !defined(DIRECT_THREADED) && !defined(AUTO_INCREMENT)\
197: && defined(LONG_LATENCY) && defined(CISC_NEXT)
198: # define NEXT_P0 ({cfa=*ip;})
199: # define IP (ip)
200: # define NEXT_INST (cfa)
201: # define INC_IP(const_inc) ({cfa=IP[const_inc]; ip+=(const_inc);})
202: # define DEF_CA
203: # define NEXT_P1 (ip++)
204: # define NEXT_P2 ({goto **cfa;})
205: # define EXEC(XT) ({cfa=(XT); goto **cfa;})
206: #endif
207:
208: #if !defined(DIRECT_THREADED) && !defined(AUTO_INCREMENT)\
209: && defined(LONG_LATENCY) && !defined(CISC_NEXT)
210: # define NEXT_P0 ({cfa=*ip;})
211: # define IP (ip)
212: # define NEXT_INST (cfa)
213: # define INC_IP(const_inc) ({cfa=IP[const_inc]; ip+=(const_inc);})
214: # define DEF_CA Label ca;
215: # define NEXT_P1 ({ip++; ca=*cfa;})
216: # define NEXT_P2 ({goto *ca;})
217: # define EXEC(XT) ({DEF_CA cfa=(XT); ca=*cfa; goto *ca;})
218: #endif
219:
220:
221: #if !defined(DIRECT_THREADED) && !defined(AUTO_INCREMENT)\
222: && !defined(LONG_LATENCY) && defined(CISC_NEXT)
223: # define NEXT_P0
224: # define IP (ip)
225: # define NEXT_INST (*ip)
226: # define INC_IP(const_inc) ({ip+=(const_inc);})
227: # define DEF_CA
228: # define NEXT_P1 ({cfa=*ip;})
229: # define NEXT_P2 ({ip++; goto **cfa;})
230: # define EXEC(XT) ({cfa=(XT); goto **cfa;})
231: #endif
232:
233: #if !defined(DIRECT_THREADED) && !defined(AUTO_INCREMENT)\
234: && !defined(LONG_LATENCY) && !defined(CISC_NEXT)
235: # define NEXT_P0 ({cfa=*ip;})
236: # define IP (ip)
237: # define NEXT_INST (cfa)
238: # define INC_IP(const_inc) ({cfa=IP[const_inc]; ip+=(const_inc);})
239: # define DEF_CA Label ca;
240: # define NEXT_P1 ({ip++; ca=*cfa;})
241: # define NEXT_P2 ({goto *ca;})
242: # define EXEC(XT) ({DEF_CA cfa=(XT); ca=*cfa; goto *ca;})
243: #endif
244:
245: #define NEXT ({DEF_CA NEXT_P1; NEXT_P2;})
246:
247: #if defined(CISC_NEXT) && !defined(LONG_LATENCY)
248: # define NEXT1_P1
249: # ifdef DIRECT_THREADED
250: # define NEXT1_P2 ({goto *cfa;})
251: # else
252: # define NEXT1_P2 ({goto **cfa;})
253: # endif /* DIRECT_THREADED */
254: #else /* defined(CISC_NEXT) && !defined(LONG_LATENCY) */
255: # ifdef DIRECT_THREADED
256: # define NEXT1_P1
257: # define NEXT1_P2 ({goto *cfa;})
258: # else /* DIRECT_THREADED */
259: # define NEXT1_P1 ({ca = *cfa;})
260: # define NEXT1_P2 ({goto *ca;})
261: # endif /* DIRECT_THREADED */
262: #endif
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