1: /* This is the machine-specific part for a HPPA running HP-UX
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: #if !defined(USE_TOS) && !defined(USE_NO_TOS)
23: #define USE_TOS
24: #endif
25:
26: #ifndef INDIRECT_THREADED
27: #ifndef DIRECT_THREADED
28: #define DIRECT_THREADED
29: #endif
30: #endif
31:
32: #define LONG_LATENCY
33:
34: /* cache flush stuff */
35: extern void cacheflush(void *, int, int);
36: #ifdef DEBUG
37: # define FLUSH_ICACHE(addr,size) \
38: ({ \
39: fprintf(stderr,"Flushing Cache at %08x:%08x\n",(int) addr, size); \
40: fflush(stderr); \
41: cacheflush((void *)(addr), (int)(size), 32); \
42: fprintf(stderr,"Cache flushed\n"); })
43: #else
44: # define FLUSH_ICACHE(addr,size) \
45: cacheflush((void *)(addr), (int)(size), 32)
46: #endif
47:
48: #include "32bit.h"
49:
50: #ifdef DIRECT_THREADED
51: /* PFA gives the parameter field address corresponding to a cfa */
52: # define PFA(cfa) (((Cell *)cfa)+2)
53: /* PFA1 is a special version for use just after a NEXT1 */
54: /* the improvement here is that we may destroy cfa before using PFA1 */
55: # define PFA1(cfa) PFA(cfa)
56: /* HPPA uses register 2 for branch and link */
57:
58: /* CODE_ADDRESS is the address of the code jumped to through the code field */
59:
60: /* MAKE_CF creates an appropriate code field at the cfa; ca is the code address */
61: /* we use ble and a register, since 'bl' only has 21 bits displacement */
62: #endif
63:
64: #ifdef DIRECT_THREADED
65:
66: # ifdef DEBUG
67: # define DOUT(a,b,c,d) fprintf(stderr,a,b,c,d)
68: # else
69: # define DOUT(a,b,c,d)
70: # endif
71:
72: # define ASS17(n)(((((n) >> 13) & 0x1F) << 16)| /* first 5 bits */ \
73: ((((n) >> 2) & 0x3FF) << 3)| /* second 11 bits */ \
74: ((((n) >> 12) & 0x1) << 2) | /* lo sign (aaarg!) */ \
75: (((n) < 0) << 0)) /* sign bit */
76:
77: # define DIS17(n)(((((n) >> 16) & 0x1F) << 13)| /* first 5 bits */ \
78: ((((n) >> 3) & 0x3FF) << 2)| /* second 11 bits */ \
79: ((((n) >> 2) & 0x1) << 12) | /* lo sign (aaarg!) */ \
80: (-((n) & 1) << 18)) /* sign bit */
81:
82: # define CODE_ADDRESS(cfa)\
83: ((Label)({ \
84: unsigned int *_cfa=(unsigned int *)(cfa); unsigned _ca; \
85: if((_cfa[0] & 0xFFE0E002) == 0xE8000000) /* relative branch */ \
86: { \
87: _ca = _cfa[0]; \
88: _ca = DIS17(_ca); \
89: _ca += (int) (_cfa + 1); \
90: } \
91: else if((_cfa[0] & 0xFFE0E002) == 0xE0000000) /* absolute branch */ \
92: { \
93: _ca = _cfa[0]; \
94: _ca = DIS17(_ca)-4; \
95: } \
96: else \
97: { \
98: _ca = _cfa[0]; \
99: _ca = (_ca<<31) | \
100: ((_ca>>1 ) & 0x00001800) | \
101: ((_ca>>3 ) & 0x0003E000) | \
102: ((_ca<<4 ) & 0x000C0000) | \
103: ((_ca<<19) & 0x7FF00000) | \
104: ((_cfa[1]>>1) & 0xFFC); \
105: } \
106: /* printf("code-address at %08x: %08x\n",_ca,_cfa); */ \
107: _ca; \
108: }))
109:
110: # define MAKE_CF(cfa,ca) \
111: ({ \
112: long *_cfa = (long *)(cfa); \
113: int _ca = (int)(ca)+4; \
114: int _dp = _ca-(int)(_cfa+2); \
115: \
116: if(_ca < 0x40000) /* Branch absolute */ \
117: { \
118: _cfa[0] =((0x38 << 26) | /* major opcode */ \
119: ( 0 << 21) | /* register */ \
120: ( 0 << 13) | /* space register */ \
121: ( 0 << 1) | /* if 1, don't execute delay slot */ \
122: ASS17(_ca)); \
123: _cfa[1] = ((long *)(_ca))[-1]; /* or %r0,%r0,%r0 */; \
124: } \
125: else if(_dp < 0x40000 || _dp >= -0x40000) \
126: { \
127: _cfa[0] =((0x3A << 26) | /* major opcode */ \
128: ( 0 << 21) | /* register */ \
129: ( 0 << 13) | /* space register */ \
130: ( 0 << 1) | /* if 1, don't execute delay slot */ \
131: ASS17(_dp)); \
132: _cfa[1] = ((long *)(_ca))[-1]; /* 0x08000240 or %r0,%r0,%r0 */; \
133: } \
134: else \
135: { \
136: _ca -= 4; \
137: _cfa[0] = (0x08 << 26) | \
138: ((int)_ca<0) | \
139: (_ca & 0x00001800)<<1 | \
140: (_ca & 0x0003E000)<<3 | \
141: (_ca & 0x000C0000)>>4 | \
142: (_ca & 0x7FF00000)>>19; \
143: _ca &= 0x3FF; \
144: _cfa[1] =((0x38 << 26) | /* major opcode */ \
145: ( 1 << 21) | /* register */ \
146: ( 0 << 13) | /* space register */ \
147: ( 1 << 1) | /* if 1, don't execute delay slot */ \
148: ASS17(_ca)); \
149: } \
150: DOUT("%08x: %08x,%08x\n",(int)_cfa,_cfa[0],_cfa[1]); \
151: })
152: /* HP wins the price for the most obfuscated binary opcode */
153:
154: /* this is the point where the does code starts if label points to the
155: * jump dodoes */
156:
157: /* this is a special version of DOES_CODE for use in dodoes */
158: # define DOES_CODE1(cfa) ((Xt *)(((long *)(cfa))[1]))
159:
160: # define DOES_CODE(cfa) \
161: (((((*(long *)(cfa)) & 0xF7E0E002) == 0xE0000000) && \
162: ((long)(CODE_ADDRESS(CODE_ADDRESS(cfa))) == (long)symbols[DODOES])) ? \
163: DOES_CODE1(cfa) : 0L)
164:
165: /* ({register Xt * _ret asm("%r31"); _ret;}) */
166:
167: /* HPPA uses register 2 for branch and link */
168:
169: # define DOES_HANDLER_SIZE 8
170: # define MAKE_DOES_HANDLER(cfa) ({ *(long *)(cfa)=DODOES; })
171: #ifdef undefined
172: # define MAKE_DOES_HANDLER(cfa) \
173: ({ \
174: long *_cfa = (long *)(cfa); \
175: int _ca = (int)symbols[DODOES]; \
176: int _dp = _ca-(int)(_cfa+2); \
177: \
178: if(_ca < 0x40000) /* Branch absolute */ \
179: { \
180: _cfa[0] =((0x38 << 26) | /* major opcode */ \
181: ( 0 << 21) | /* register */ \
182: ( 0 << 13) | /* space register */ \
183: ( 0 << 1) | /* if 1, don't execute delay slot */ \
184: ASS17(_ca)); \
185: _cfa[1] = 0x08000240 /* or %r0,%r0,%r0 */; \
186: } \
187: else if(_dp < 0x40000 || _dp >= -0x40000) \
188: { \
189: _cfa[0] =((0x3A << 26) | /* major opcode */ \
190: ( 0 << 21) | /* register */ \
191: ( 0 << 13) | /* space register */ \
192: ( 0 << 1) | /* if 1, don't execute delay slot */ \
193: ASS17(_dp)); \
194: _cfa[1] = 0x08000240 /* or %r0,%r0,%r0 */; \
195: } \
196: else \
197: { \
198: _ca -= 4; \
199: _cfa[0] = ((0x08 << 26) | \
200: ((int)_ca<0) | \
201: (_ca & 0x00001800)<<1 | \
202: (_ca & 0x0003E000)<<3 | \
203: (_ca & 0x000C0000)>>4 | \
204: (_ca & 0x7FF00000)>>19); \
205: _ca &= 0x3FF; \
206: _cfa[1] =((0x38 << 26) | /* major opcode */ \
207: ( 1 << 21) | /* register */ \
208: ( 0 << 13) | /* space register */ \
209: ( 1 << 1) | /* if 1, don't execute delay slot */ \
210: ASS17(_ca)); \
211: } \
212: DOUT("%08x: %08x,%08x\n",(int)_cfa,_cfa[0],_cfa[1]); \
213: })
214: #endif
215:
216: # define MAKE_DOES_CF(cfa,ca) \
217: ({ \
218: long *_cfa = (long *)(cfa); \
219: int _ca = (int)symbols[DODOES]; \
220: int _dp = _ca-(int)(_cfa+2); \
221: \
222: if(_ca < 0x40000) /* Branch absolute */ \
223: { \
224: _cfa[0] =((0x38 << 26) | /* major opcode */ \
225: ( 0 << 21) | /* register */ \
226: ( 0 << 13) | /* space register */ \
227: ( 1 << 1) | /* if 1, don't execute delay slot */ \
228: ASS17(_ca)); \
229: _cfa[1] = (long)(ca); \
230: } \
231: else if(_dp < 0x40000 || _dp >= -0x40000) \
232: { \
233: _cfa[0] =((0x3A << 26) | /* major opcode */ \
234: ( 0 << 21) | /* register */ \
235: ( 0 << 13) | /* space register */ \
236: ( 1 << 1) | /* if 1, don't execute delay slot */ \
237: ASS17(_dp)); \
238: _cfa[1] = (long)(ca); \
239: } \
240: else \
241: { \
242: fprintf(stderr,"DOESCFA assignment failed, use ITC instead of DTC\n"); exit(1); \
243: } \
244: DOUT("%08x: %08x,%08x\n",(int)_cfa,_cfa[0],_cfa[1]); \
245: })
246: /* this stores a call dodoes at addr */
247: #endif
248:
249: #undef HAVE_LOG1P
250: #undef HAVE_RINT
251:
252: #ifdef FORCE_REG
253: #define IPREG asm("%r10")
254: #define SPREG asm("%r9")
255: #define RPREG asm("%r8")
256: #define LPREG asm("%r7")
257: #define CFAREG asm("%r6")
258: #define TOSREG asm("%r11")
259: #endif /* FORCE_REG */
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