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e0709f50 AC |
1 | /* sim-main.h -- Simulator for Motorola 68HC11 |
2 | Copyright (C) 1999, 2000 Free Software Foundation, Inc. | |
3 | Written by Stephane Carrez (stcarrez@worldnet.fr) | |
4 | ||
5 | This file is part of GDB, the GNU debugger. | |
6 | ||
7 | This program is free software; you can redistribute it and/or modify | |
8 | it under the terms of the GNU General Public License as published by | |
9 | the Free Software Foundation; either version 2, or (at your option) | |
10 | 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 along | |
18 | with this program; if not, write to the Free Software Foundation, Inc., | |
19 | 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ | |
20 | ||
21 | #ifndef _SIM_MAIN_H | |
22 | #define _SIM_MAIN_H | |
23 | ||
24 | #define WITH_MODULO_MEMORY 1 | |
25 | #define WITH_WATCHPOINTS 1 | |
26 | #define SIM_HANDLES_LMA 1 | |
27 | ||
28 | #include "sim-basics.h" | |
29 | ||
30 | typedef address_word sim_cia; | |
31 | ||
32 | #include "sim-signal.h" | |
33 | #include "sim-base.h" | |
34 | ||
35 | #include "bfd.h" | |
36 | ||
37 | #include "opcode/m68hc11.h" | |
38 | ||
39 | #include "callback.h" | |
40 | #include "remote-sim.h" | |
41 | #include "opcode/m68hc11.h" | |
42 | #include "sim-types.h" | |
43 | ||
44 | typedef unsigned8 uint8; | |
45 | typedef unsigned16 uint16; | |
46 | typedef signed16 int16; | |
47 | typedef unsigned32 uint32; | |
48 | typedef signed32 int32; | |
49 | typedef unsigned64 uint64; | |
50 | typedef signed64 int64; | |
51 | ||
52 | struct _sim_cpu; | |
53 | ||
54 | #include "interrupts.h" | |
55 | #include <setjmp.h> | |
56 | ||
63348d04 SC |
57 | /* Specifies the level of mapping for the IO, EEprom, nvram and external |
58 | RAM. IO registers are mapped over everything and the external RAM | |
59 | is last (ie, it can be hidden by everything above it in the list). */ | |
60 | enum m68hc11_map_level | |
61 | { | |
62 | M6811_IO_LEVEL, | |
63 | M6811_EEPROM_LEVEL, | |
64 | M6811_NVRAM_LEVEL, | |
65 | M6811_RAM_LEVEL | |
66 | }; | |
67 | ||
68 | ||
e0709f50 AC |
69 | #define X_REGNUM 0 |
70 | #define D_REGNUM 1 | |
71 | #define Y_REGNUM 2 | |
72 | #define SP_REGNUM 3 | |
73 | #define PC_REGNUM 4 | |
74 | #define A_REGNUM 5 | |
75 | #define B_REGNUM 6 | |
76 | #define PSW_REGNUM 7 | |
77 | #define Z_REGNUM 8 | |
e0709f50 AC |
78 | |
79 | typedef struct m6811_regs { | |
80 | unsigned short d; | |
81 | unsigned short ix; | |
82 | unsigned short iy; | |
83 | unsigned short sp; | |
84 | unsigned short pc; | |
85 | unsigned char ccr; | |
86 | } m6811_regs; | |
87 | ||
88 | ||
89 | /* Description of 68HC11 IO registers. Such description is only provided | |
90 | for the info command to display the current setting of IO registers | |
91 | from GDB. */ | |
92 | struct io_reg_desc | |
93 | { | |
94 | int mask; | |
95 | const char *short_name; | |
96 | const char *long_name; | |
97 | }; | |
98 | typedef struct io_reg_desc io_reg_desc; | |
99 | ||
100 | extern void print_io_reg_desc (SIM_DESC sd, io_reg_desc *desc, int val, | |
101 | int mode); | |
102 | extern void print_io_byte (SIM_DESC sd, const char *name, | |
103 | io_reg_desc *desc, uint8 val, uint16 addr); | |
104 | ||
105 | ||
106 | /* List of special 68HC11 instructions that are not handled by the | |
107 | 'gencode.c' generator. These complex instructions are implemented | |
108 | by 'cpu_special'. */ | |
109 | enum M6811_Special | |
110 | { | |
111 | M6811_RTI, | |
112 | M6811_WAI, | |
113 | M6811_SWI, | |
114 | M6811_TEST, | |
115 | M6811_ILLEGAL, | |
116 | M6811_EMUL_SYSCALL | |
117 | }; | |
118 | ||
119 | #define CPU_POP 1 | |
120 | #define CPU_PUSH 2 | |
121 | ||
122 | #define MAX_PORTS 0x40 | |
123 | ||
124 | /* Tentative to keep track of the stack frame. | |
125 | The frame is updated each time a call or a return are made. | |
126 | We also have to take into account changes of stack pointer | |
127 | (either thread switch or longjmp). */ | |
128 | struct cpu_frame | |
129 | { | |
130 | struct cpu_frame *up; | |
131 | uint16 pc; | |
132 | uint16 sp_low; | |
133 | uint16 sp_high; | |
134 | }; | |
135 | ||
136 | /* Represents a list of frames (or a thread). */ | |
137 | struct cpu_frame_list | |
138 | { | |
139 | struct cpu_frame_list *next; | |
140 | struct cpu_frame_list *prev; | |
141 | struct cpu_frame *frame; | |
142 | }; | |
143 | ||
144 | struct _sim_cpu { | |
145 | /* CPU registers. */ | |
146 | struct m6811_regs cpu_regs; | |
147 | ||
148 | /* CPU interrupts. */ | |
149 | struct interrupts cpu_interrupts; | |
150 | ||
151 | struct cpu_frame_list *cpu_frames; | |
152 | struct cpu_frame_list *cpu_current_frame; | |
153 | int cpu_need_update_frame; | |
154 | ||
155 | /* CPU absolute cycle time. The cycle time is updated after | |
156 | each instruction, by the number of cycles taken by the instruction. | |
157 | It is cleared only when reset occurs. */ | |
158 | signed64 cpu_absolute_cycle; | |
159 | ||
160 | /* Number of cycles to increment after the current instruction. | |
161 | This is also the number of ticks for the generic event scheduler. */ | |
162 | uint8 cpu_current_cycle; | |
163 | int cpu_emul_syscall; | |
164 | int cpu_is_initialized; | |
165 | int cpu_running; | |
166 | int cpu_check_memory; | |
167 | int cpu_stop_on_interrupt; | |
168 | ||
169 | /* When this is set, start execution of program at address specified | |
170 | in the ELF header. This is used for testing some programs that do not | |
171 | have an interrupt table linked with them. Programs created during the | |
172 | GCC validation are like this. A normal 68HC11 does not behave like | |
173 | this (unless there is some OS or downloadable feature). */ | |
174 | int cpu_use_elf_start; | |
175 | ||
176 | /* The starting address specified in ELF header. */ | |
177 | int cpu_elf_start; | |
178 | ||
179 | uint16 cpu_insn_pc; | |
e0709f50 AC |
180 | |
181 | /* CPU frequency. This is the quartz frequency. It is divided by 4 to | |
182 | get the cycle time. This is used for the timer rate and for the baud | |
183 | rate generation. */ | |
184 | unsigned long cpu_frequency; | |
185 | ||
186 | /* The mode in which the CPU is configured (MODA and MODB pins). */ | |
187 | unsigned int cpu_mode; | |
188 | ||
189 | /* Initial value of the CONFIG register. */ | |
190 | uint8 cpu_config; | |
191 | uint8 cpu_use_local_config; | |
192 | ||
193 | uint8 ios[0x3F]; | |
194 | ||
195 | /* ... base type ... */ | |
196 | sim_cpu_base base; | |
197 | }; | |
198 | ||
199 | /* Returns the cpu absolute cycle time (A virtual counter incremented | |
200 | at each 68HC11 E clock). */ | |
201 | #define cpu_current_cycle(PROC) ((PROC)->cpu_absolute_cycle) | |
202 | #define cpu_add_cycles(PROC,T) ((PROC)->cpu_current_cycle += (signed64) (T)) | |
203 | #define cpu_is_running(PROC) ((PROC)->cpu_running) | |
204 | ||
205 | /* Get the IO/RAM base addresses depending on the M6811_INIT register. */ | |
206 | #define cpu_get_io_base(PROC) \ | |
207 | (((uint16)(((PROC)->ios[M6811_INIT]) & 0x0F))<<12) | |
208 | #define cpu_get_reg_base(PROC) \ | |
209 | (((uint16)(((PROC)->ios[M6811_INIT]) & 0xF0))<<8) | |
210 | ||
211 | /* Returns the different CPU registers. */ | |
212 | #define cpu_get_ccr(PROC) ((PROC)->cpu_regs.ccr) | |
213 | #define cpu_get_pc(PROC) ((PROC)->cpu_regs.pc) | |
214 | #define cpu_get_d(PROC) ((PROC)->cpu_regs.d) | |
215 | #define cpu_get_x(PROC) ((PROC)->cpu_regs.ix) | |
216 | #define cpu_get_y(PROC) ((PROC)->cpu_regs.iy) | |
217 | #define cpu_get_sp(PROC) ((PROC)->cpu_regs.sp) | |
218 | #define cpu_get_a(PROC) ((PROC->cpu_regs.d >> 8) & 0x0FF) | |
219 | #define cpu_get_b(PROC) ((PROC->cpu_regs.d) & 0x0FF) | |
220 | ||
221 | #define cpu_set_d(PROC,VAL) (((PROC)->cpu_regs.d) = (VAL)) | |
222 | #define cpu_set_x(PROC,VAL) (((PROC)->cpu_regs.ix) = (VAL)) | |
223 | #define cpu_set_y(PROC,VAL) (((PROC)->cpu_regs.iy) = (VAL)) | |
224 | ||
225 | #if 0 | |
226 | /* This is a function in m68hc11_sim.c to keep track of the frame. */ | |
227 | #define cpu_set_sp(PROC,VAL) (((PROC)->cpu_regs.sp) = (VAL)) | |
228 | #endif | |
229 | ||
230 | #define cpu_set_pc(PROC,VAL) (((PROC)->cpu_regs.pc) = (VAL)) | |
231 | ||
232 | #define cpu_set_a(PROC,VAL) \ | |
233 | cpu_set_d(PROC,((VAL) << 8) | cpu_get_b(PROC)) | |
234 | #define cpu_set_b(PROC,VAL) \ | |
235 | cpu_set_d(PROC,((cpu_get_a(PROC)) << 8)|(VAL & 0x0FF)) | |
236 | ||
237 | #define cpu_set_ccr(PROC,VAL) ((PROC)->cpu_regs.ccr = (VAL)) | |
238 | #define cpu_get_ccr_H(PROC) ((cpu_get_ccr(PROC) & M6811_H_BIT) ? 1: 0) | |
239 | #define cpu_get_ccr_X(PROC) ((cpu_get_ccr(PROC) & M6811_X_BIT) ? 1: 0) | |
240 | #define cpu_get_ccr_S(PROC) ((cpu_get_ccr(PROC) & M6811_S_BIT) ? 1: 0) | |
241 | #define cpu_get_ccr_N(PROC) ((cpu_get_ccr(PROC) & M6811_N_BIT) ? 1: 0) | |
242 | #define cpu_get_ccr_V(PROC) ((cpu_get_ccr(PROC) & M6811_V_BIT) ? 1: 0) | |
243 | #define cpu_get_ccr_C(PROC) ((cpu_get_ccr(PROC) & M6811_C_BIT) ? 1: 0) | |
244 | #define cpu_get_ccr_Z(PROC) ((cpu_get_ccr(PROC) & M6811_Z_BIT) ? 1: 0) | |
245 | #define cpu_get_ccr_I(PROC) ((cpu_get_ccr(PROC) & M6811_I_BIT) ? 1: 0) | |
246 | ||
247 | #define cpu_set_ccr_flag(S,B,V) \ | |
248 | cpu_set_ccr(S,(cpu_get_ccr(S) & ~(B)) | ((V) ? B : 0)) | |
249 | ||
250 | #define cpu_set_ccr_H(PROC,VAL) cpu_set_ccr_flag(PROC, M6811_H_BIT, VAL) | |
251 | #define cpu_set_ccr_X(PROC,VAL) cpu_set_ccr_flag(PROC, M6811_X_BIT, VAL) | |
252 | #define cpu_set_ccr_S(PROC,VAL) cpu_set_ccr_flag(PROC, M6811_S_BIT, VAL) | |
253 | #define cpu_set_ccr_N(PROC,VAL) cpu_set_ccr_flag(PROC, M6811_N_BIT, VAL) | |
254 | #define cpu_set_ccr_V(PROC,VAL) cpu_set_ccr_flag(PROC, M6811_V_BIT, VAL) | |
255 | #define cpu_set_ccr_C(PROC,VAL) cpu_set_ccr_flag(PROC, M6811_C_BIT, VAL) | |
256 | #define cpu_set_ccr_Z(PROC,VAL) cpu_set_ccr_flag(PROC, M6811_Z_BIT, VAL) | |
257 | #define cpu_set_ccr_I(PROC,VAL) cpu_set_ccr_flag(PROC, M6811_I_BIT, VAL) | |
258 | ||
259 | #undef inline | |
260 | #define inline static __inline__ | |
261 | ||
262 | extern void cpu_memory_exception (struct _sim_cpu *proc, | |
263 | SIM_SIGNAL excep, | |
264 | uint16 addr, | |
265 | const char *message); | |
266 | ||
267 | inline uint8 | |
268 | memory_read8 (sim_cpu *cpu, uint16 addr) | |
269 | { | |
270 | uint8 val; | |
271 | ||
272 | if (sim_core_read_buffer (CPU_STATE (cpu), cpu, 0, &val, addr, 1) != 1) | |
273 | { | |
274 | cpu_memory_exception (cpu, SIM_SIGSEGV, addr, | |
275 | "Read error"); | |
276 | } | |
277 | return val; | |
278 | } | |
279 | ||
280 | inline void | |
281 | memory_write8 (sim_cpu *cpu, uint16 addr, uint8 val) | |
282 | { | |
283 | if (sim_core_write_buffer (CPU_STATE (cpu), cpu, 0, &val, addr, 1) != 1) | |
284 | { | |
285 | cpu_memory_exception (cpu, SIM_SIGSEGV, addr, | |
286 | "Write error"); | |
287 | } | |
288 | } | |
289 | ||
290 | inline uint16 | |
291 | memory_read16 (sim_cpu *cpu, uint16 addr) | |
292 | { | |
293 | uint8 b[2]; | |
294 | ||
295 | if (sim_core_read_buffer (CPU_STATE (cpu), cpu, 0, b, addr, 2) != 2) | |
296 | { | |
297 | cpu_memory_exception (cpu, SIM_SIGSEGV, addr, | |
298 | "Read error"); | |
299 | } | |
300 | return (((uint16) (b[0])) << 8) | ((uint16) b[1]); | |
301 | } | |
302 | ||
303 | inline void | |
304 | memory_write16 (sim_cpu *cpu, uint16 addr, uint16 val) | |
305 | { | |
306 | uint8 b[2]; | |
307 | ||
308 | b[0] = val >> 8; | |
309 | b[1] = val; | |
310 | if (sim_core_write_buffer (CPU_STATE (cpu), cpu, 0, b, addr, 2) != 2) | |
311 | { | |
312 | cpu_memory_exception (cpu, SIM_SIGSEGV, addr, | |
313 | "Write error"); | |
314 | } | |
315 | } | |
316 | extern void | |
317 | cpu_ccr_update_tst8 (sim_cpu *proc, uint8 val); | |
318 | ||
319 | inline void | |
320 | cpu_ccr_update_tst16 (sim_cpu *proc, uint16 val) | |
321 | { | |
322 | cpu_set_ccr_V (proc, 0); | |
323 | cpu_set_ccr_N (proc, val & 0x8000 ? 1 : 0); | |
324 | cpu_set_ccr_Z (proc, val == 0 ? 1 : 0); | |
325 | } | |
326 | ||
327 | inline void | |
328 | cpu_ccr_update_shift8 (sim_cpu *proc, uint8 val) | |
329 | { | |
330 | cpu_set_ccr_N (proc, val & 0x80 ? 1 : 0); | |
331 | cpu_set_ccr_Z (proc, val == 0 ? 1 : 0); | |
332 | cpu_set_ccr_V (proc, cpu_get_ccr_N (proc) ^ cpu_get_ccr_C (proc)); | |
333 | } | |
334 | ||
335 | inline void | |
336 | cpu_ccr_update_shift16 (sim_cpu *proc, uint16 val) | |
337 | { | |
338 | cpu_set_ccr_N (proc, val & 0x8000 ? 1 : 0); | |
339 | cpu_set_ccr_Z (proc, val == 0 ? 1 : 0); | |
340 | cpu_set_ccr_V (proc, cpu_get_ccr_N (proc) ^ cpu_get_ccr_C (proc)); | |
341 | } | |
342 | ||
343 | inline void | |
344 | cpu_ccr_update_add8 (sim_cpu *proc, uint8 r, uint8 a, uint8 b) | |
345 | { | |
346 | cpu_set_ccr_C (proc, ((a & b) | (b & ~r) | (a & ~r)) & 0x80 ? 1 : 0); | |
347 | cpu_set_ccr_V (proc, ((a & b & ~r) | (~a & ~b & r)) & 0x80 ? 1 : 0); | |
348 | cpu_set_ccr_Z (proc, r == 0); | |
349 | cpu_set_ccr_N (proc, r & 0x80 ? 1 : 0); | |
350 | } | |
351 | ||
352 | ||
353 | inline void | |
354 | cpu_ccr_update_sub8 (sim_cpu *proc, uint8 r, uint8 a, uint8 b) | |
355 | { | |
356 | cpu_set_ccr_C (proc, ((~a & b) | (b & r) | (~a & r)) & 0x80 ? 1 : 0); | |
357 | cpu_set_ccr_V (proc, ((a & ~b & ~r) | (~a & b & r)) & 0x80 ? 1 : 0); | |
358 | cpu_set_ccr_Z (proc, r == 0); | |
359 | cpu_set_ccr_N (proc, r & 0x80 ? 1 : 0); | |
360 | } | |
361 | ||
362 | inline void | |
363 | cpu_ccr_update_add16 (sim_cpu *proc, uint16 r, uint16 a, uint16 b) | |
364 | { | |
365 | cpu_set_ccr_C (proc, ((a & b) | (b & ~r) | (a & ~r)) & 0x8000 ? 1 : 0); | |
366 | cpu_set_ccr_V (proc, ((a & b & ~r) | (~a & ~b & r)) & 0x8000 ? 1 : 0); | |
367 | cpu_set_ccr_Z (proc, r == 0); | |
368 | cpu_set_ccr_N (proc, r & 0x8000 ? 1 : 0); | |
369 | } | |
370 | ||
371 | inline void | |
372 | cpu_ccr_update_sub16 (sim_cpu *proc, uint16 r, uint16 a, uint16 b) | |
373 | { | |
374 | cpu_set_ccr_C (proc, ((~a & b) | (b & r) | (~a & r)) & 0x8000 ? 1 : 0); | |
375 | cpu_set_ccr_V (proc, ((a & ~b & ~r) | (~a & b & r)) & 0x8000 ? 1 : 0); | |
376 | cpu_set_ccr_Z (proc, r == 0); | |
377 | cpu_set_ccr_N (proc, r & 0x8000 ? 1 : 0); | |
378 | } | |
379 | ||
380 | ||
381 | inline void | |
382 | cpu_push_uint8 (sim_cpu *proc, uint8 val) | |
383 | { | |
384 | uint16 addr = proc->cpu_regs.sp; | |
385 | ||
386 | memory_write8 (proc, addr, val); | |
387 | proc->cpu_regs.sp = addr - 1; | |
388 | proc->cpu_need_update_frame |= CPU_PUSH; | |
389 | } | |
390 | ||
391 | inline void | |
392 | cpu_push_uint16 (sim_cpu *proc, uint16 val) | |
393 | { | |
394 | uint16 addr = proc->cpu_regs.sp - 1; | |
395 | ||
396 | memory_write16 (proc, addr, val); | |
397 | proc->cpu_regs.sp = addr - 1; | |
398 | proc->cpu_need_update_frame |= CPU_PUSH; | |
399 | } | |
400 | ||
401 | inline uint8 | |
402 | cpu_pop_uint8 (sim_cpu *proc) | |
403 | { | |
404 | uint16 addr = proc->cpu_regs.sp; | |
405 | uint8 val; | |
406 | ||
407 | val = memory_read8 (proc, addr + 1); | |
408 | proc->cpu_regs.sp = addr + 1; | |
409 | proc->cpu_need_update_frame |= CPU_POP; | |
410 | return val; | |
411 | } | |
412 | ||
413 | inline uint16 | |
414 | cpu_pop_uint16 (sim_cpu *proc) | |
415 | { | |
416 | uint16 addr = proc->cpu_regs.sp; | |
417 | uint16 val; | |
418 | ||
419 | val = memory_read16 (proc, addr + 1); | |
420 | proc->cpu_regs.sp = addr + 2; | |
421 | proc->cpu_need_update_frame |= CPU_POP; | |
422 | return val; | |
423 | } | |
424 | ||
425 | inline uint8 | |
426 | cpu_fetch8 (sim_cpu *proc) | |
427 | { | |
428 | uint16 addr = proc->cpu_regs.pc; | |
429 | uint8 val; | |
430 | ||
431 | val = memory_read8 (proc, addr); | |
432 | proc->cpu_regs.pc = addr + 1; | |
433 | return val; | |
434 | } | |
435 | ||
436 | inline uint16 | |
437 | cpu_fetch16 (sim_cpu *proc) | |
438 | { | |
439 | uint16 addr = proc->cpu_regs.pc; | |
440 | uint16 val; | |
441 | ||
442 | val = memory_read16 (proc, addr); | |
443 | proc->cpu_regs.pc = addr + 2; | |
444 | return val; | |
445 | } | |
446 | ||
447 | extern void cpu_call (sim_cpu* proc, uint16 addr); | |
448 | extern void cpu_special (sim_cpu *proc, enum M6811_Special special); | |
449 | ||
450 | extern uint16 cpu_fetch_relbranch (sim_cpu *proc); | |
451 | extern void cpu_push_all (sim_cpu *proc); | |
452 | extern void cpu_single_step (sim_cpu *proc); | |
453 | ||
454 | extern void cpu_info (SIM_DESC sd, sim_cpu *proc); | |
455 | ||
456 | extern int cpu_initialize (SIM_DESC sd, sim_cpu *cpu); | |
457 | ||
458 | extern void cpu_print_frame (SIM_DESC sd, sim_cpu *cpu); | |
459 | extern void cpu_set_sp (sim_cpu *cpu, uint16 val); | |
460 | extern uint16 cpu_frame_reg (sim_cpu *cpu, uint16 rn); | |
461 | extern int cpu_reset (sim_cpu *cpu); | |
462 | extern int cpu_restart (sim_cpu *cpu); | |
463 | extern void sim_memory_error (sim_cpu *cpu, SIM_SIGNAL excep, | |
464 | uint16 addr, const char *message, ...); | |
465 | extern void emul_os (int op, sim_cpu *cpu); | |
466 | extern void cpu_interp (sim_cpu *cpu); | |
467 | ||
468 | /* The current state of the processor; registers, memory, etc. */ | |
469 | ||
470 | #define CIA_GET(CPU) (cpu_get_pc (CPU)) | |
471 | #define CIA_SET(CPU,VAL) (cpu_set_pc ((CPU), (VAL))) | |
472 | ||
473 | #if (WITH_SMP) | |
474 | #define STATE_CPU(sd,n) (&(sd)->cpu[n]) | |
475 | #else | |
476 | #define STATE_CPU(sd,n) (&(sd)->cpu[0]) | |
477 | #endif | |
478 | ||
479 | struct sim_state { | |
480 | sim_cpu cpu[MAX_NR_PROCESSORS]; | |
481 | device *devices; | |
482 | sim_state_base base; | |
483 | }; | |
484 | ||
485 | extern void sim_set_profile (int n); | |
486 | extern void sim_set_profile_size (int n); | |
487 | extern void sim_board_reset (SIM_DESC sd); | |
488 | ||
2990a9f4 SC |
489 | extern const char *cycle_to_string (sim_cpu *cpu, signed64 t); |
490 | ||
e0709f50 AC |
491 | #endif |
492 | ||
493 |