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[/] [openrisc/] [trunk/] [gnu-src/] [gdb-7.1/] [sim/] [common/] [cgen-utils.c] - Blame information for rev 252

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1 227 jeremybenn 
/* Support code for various pieces of CGEN simulators.
2 
   Copyright (C) 1996, 1997, 1998, 1999, 2007, 2008, 2009, 2010
3 
   Free Software Foundation, Inc.
4 
   Contributed by Cygnus Support.
5 
 
6 
This file is part of GDB, the GNU debugger.
7 
 
8 
This program is free software; you can redistribute it and/or modify
9 
it under the terms of the GNU General Public License as published by
10 
the Free Software Foundation; either version 3 of the License, or
11 
(at your option) any later version.
12 
 
13 
This program is distributed in the hope that it will be useful,
14 
but WITHOUT ANY WARRANTY; without even the implied warranty of
15 
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
16 
GNU General Public License for more details.
17 
 
18 
You should have received a copy of the GNU General Public License
19 
along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
20 
 
21 
#include "bfd.h"
22 
#include "sim-main.h"
23 
#include "dis-asm.h"
24 
 
25 
#define MEMOPS_DEFINE_INLINE
26 
#include "cgen-mem.h"
27 
 
28 
#define SEMOPS_DEFINE_INLINE
29 
#include "cgen-ops.h"
30 
 
31 
#undef min
32 
#define min(a,b) ((a) < (b) ? (a) : (b))
33 
 
34 
const char *mode_names[] = {
35 
  "VOID",
36 
  "BI",
37 
  "QI",
38 
  "HI",
39 
  "SI",
40 
  "DI",
41 
  "UQI",
42 
  "UHI",
43 
  "USI",
44 
  "UDI",
45 
  "SF",
46 
  "DF",
47 
  "XF",
48 
  "TF",
49 
  0, /* MODE_TARGET_MAX */
50 
  "INT",
51 
  "UINT",
52 
  "PTR"
53 
};
54 
 
55 
/* Opcode table for virtual insns used by the simulator.  */
56 
 
57 
#define V CGEN_ATTR_MASK (CGEN_INSN_VIRTUAL)
58 
 
59 
static const CGEN_IBASE virtual_insn_entries[] =
60 
{
61 
  {
62 
    VIRTUAL_INSN_X_INVALID, "--invalid--", NULL, 0, { V, { 0 } }
63 
  },
64 
  {
65 
    VIRTUAL_INSN_X_BEFORE, "--before--", NULL, 0, { V, { 0 } }
66 
  },
67 
  {
68 
    VIRTUAL_INSN_X_AFTER, "--after--", NULL, 0, { V, { 0 } }
69 
  },
70 
  {
71 
    VIRTUAL_INSN_X_BEGIN, "--begin--", NULL, 0, { V, { 0 } }
72 
  },
73 
  {
74 
    VIRTUAL_INSN_X_CHAIN, "--chain--", NULL, 0, { V, { 0 } }
75 
  },
76 
  {
77 
    VIRTUAL_INSN_X_CTI_CHAIN, "--cti-chain--", NULL, 0, { V, { 0 } }
78 
  }
79 
};
80 
 
81 
#undef V
82 
 
83 
const CGEN_INSN cgen_virtual_insn_table[] =
84 
{
85 
  { & virtual_insn_entries[0] },
86 
  { & virtual_insn_entries[1] },
87 
  { & virtual_insn_entries[2] },
88 
  { & virtual_insn_entries[3] },
89 
  { & virtual_insn_entries[4] },
90 
  { & virtual_insn_entries[5] }
91 
};
92 
 
93 
/* Initialize cgen things.
94 
   This is called after sim_post_argv_init.  */
95 
 
96 
void
97 
cgen_init (SIM_DESC sd)
98 
{
99 
  int i, c;
100 
 
101 
  /* If no profiling or tracing has been enabled, run in fast mode.  */
102 
  {
103 
    int run_fast_p = 1;
104 
 
105 
    for (c = 0; c < MAX_NR_PROCESSORS; ++c)
106 
      {
107 
        SIM_CPU *cpu = STATE_CPU (sd, c);
108 
 
109 
        for (i = 0; i < MAX_PROFILE_VALUES; ++i)
110 
          if (CPU_PROFILE_FLAGS (cpu) [i])
111 
            {
112 
              run_fast_p = 0;
113 
              break;
114 
            }
115 
        for (i = 0; i < MAX_TRACE_VALUES; ++i)
116 
          if (CPU_TRACE_FLAGS (cpu) [i])
117 
            {
118 
              run_fast_p = 0;
119 
              break;
120 
            }
121 
        if (! run_fast_p)
122 
          break;
123 
      }
124 
    STATE_RUN_FAST_P (sd) = run_fast_p;
125 
  }
126 
}
127 
 
128 
/* Return the name of insn number I.  */
129 
 
130 
const char *
131 
cgen_insn_name (SIM_CPU *cpu, int i)
132 
{
133 
  return CGEN_INSN_NAME ((* CPU_GET_IDATA (cpu)) ((cpu), (i)));
134 
}
135 
 
136 
/* Return the maximum number of extra bytes required for a SIM_CPU struct.  */
137 
 
138 
int
139 
cgen_cpu_max_extra_bytes (void)
140 
{
141 
  int i;
142 
  int extra = 0;
143 
 
144 
  for (i = 0; sim_machs[i] != 0; ++i)
145 
    {
146 
      int size = IMP_PROPS_SIM_CPU_SIZE (MACH_IMP_PROPS (sim_machs[i]));
147 
      if (size > extra)
148 
        extra = size;
149 
    }
150 
  return extra;
151 
}
152 
 
153 
#ifdef DI_FN_SUPPORT
154 
 
155 
DI
156 
make_struct_di (hi, lo)
157 
     SI hi, lo;
158 
{
159 
  DI result;
160 
 
161 
  result.hi = hi;
162 
  result.lo = lo;
163 
  return result;
164 
}
165 
 
166 
DI
167 
ANDDI (a, b)
168 
     DI a, b;
169 
{
170 
  SI ahi = GETHIDI (a);
171 
  SI alo = GETLODI (a);
172 
  SI bhi = GETHIDI (b);
173 
  SI blo = GETLODI (b);
174 
  return MAKEDI (ahi & bhi, alo & blo);
175 
}
176 
 
177 
DI
178 
ORDI (a, b)
179 
     DI a, b;
180 
{
181 
  SI ahi = GETHIDI (a);
182 
  SI alo = GETLODI (a);
183 
  SI bhi = GETHIDI (b);
184 
  SI blo = GETLODI (b);
185 
  return MAKEDI (ahi | bhi, alo | blo);
186 
}
187 
 
188 
DI
189 
ADDDI (a, b)
190 
     DI a, b;
191 
{
192 
  USI ahi = GETHIDI (a);
193 
  USI alo = GETLODI (a);
194 
  USI bhi = GETHIDI (b);
195 
  USI blo = GETLODI (b);
196 
  USI x = alo + blo;
197 
  return MAKEDI (ahi + bhi + (x < alo), x);
198 
}
199 
 
200 
DI
201 
MULDI (a, b)
202 
     DI a, b;
203 
{
204 
  USI ahi = GETHIDI (a);
205 
  USI alo = GETLODI (a);
206 
  USI bhi = GETHIDI (b);
207 
  USI blo = GETLODI (b);
208 
  USI rhi,rlo;
209 
  USI x0, x1, x2, x3;
210 
 
211 
  x0 = alo * blo;
212 
  x1 = alo * bhi;
213 
  x2 = ahi * blo;
214 
  x3 = ahi * bhi;
215 
 
216 
#define SI_TYPE_SIZE 32
217 
#define BITS4 (SI_TYPE_SIZE / 4)
218 
#define ll_B (1L << (SI_TYPE_SIZE / 2))
219 
#define ll_lowpart(t) ((USI) (t) % ll_B)
220 
#define ll_highpart(t) ((USI) (t) / ll_B)
221 
  x1 += ll_highpart (x0);       /* this can't give carry */
222 
  x1 += x2;                     /* but this indeed can */
223 
  if (x1 < x2)                  /* did we get it? */
224 
    x3 += ll_B;                 /* yes, add it in the proper pos. */
225 
 
226 
  rhi = x3 + ll_highpart (x1);
227 
  rlo = ll_lowpart (x1) * ll_B + ll_lowpart (x0);
228 
  return MAKEDI (rhi + (alo * bhi) + (ahi * blo), rlo);
229 
}
230 
 
231 
DI
232 
SHLDI (val, shift)
233 
     DI val;
234 
     SI shift;
235 
{
236 
  USI hi = GETHIDI (val);
237 
  USI lo = GETLODI (val);
238 
  /* FIXME: Need to worry about shift < 0 || shift >= 32.  */
239 
  return MAKEDI ((hi << shift) | (lo >> (32 - shift)), lo << shift);
240 
}
241 
 
242 
DI
243 
SLADI (val, shift)
244 
     DI val;
245 
     SI shift;
246 
{
247 
  SI hi = GETHIDI (val);
248 
  USI lo = GETLODI (val);
249 
  /* FIXME: Need to worry about shift < 0 || shift >= 32.  */
250 
  return MAKEDI ((hi << shift) | (lo >> (32 - shift)), lo << shift);
251 
}
252 
 
253 
DI
254 
SRADI (val, shift)
255 
     DI val;
256 
     SI shift;
257 
{
258 
  SI hi = GETHIDI (val);
259 
  USI lo = GETLODI (val);
260 
  /* We use SRASI because the result is implementation defined if hi < 0.  */
261 
  /* FIXME: Need to worry about shift < 0 || shift >= 32.  */
262 
  return MAKEDI (SRASI (hi, shift), (hi << (32 - shift)) | (lo >> shift));
263 
}
264 
 
265 
int
266 
GEDI (a, b)
267 
     DI a, b;
268 
{
269 
  SI ahi = GETHIDI (a);
270 
  USI alo = GETLODI (a);
271 
  SI bhi = GETHIDI (b);
272 
  USI blo = GETLODI (b);
273 
  if (ahi > bhi)
274 
    return 1;
275 
  if (ahi == bhi)
276 
    return alo >= blo;
277 
  return 0;
278 
}
279 
 
280 
int
281 
LEDI (a, b)
282 
     DI a, b;
283 
{
284 
  SI ahi = GETHIDI (a);
285 
  USI alo = GETLODI (a);
286 
  SI bhi = GETHIDI (b);
287 
  USI blo = GETLODI (b);
288 
  if (ahi < bhi)
289 
    return 1;
290 
  if (ahi == bhi)
291 
    return alo <= blo;
292 
  return 0;
293 
}
294 
 
295 
DI
296 
CONVHIDI (val)
297 
     HI val;
298 
{
299 
  if (val < 0)
300 
    return MAKEDI (-1, val);
301 
  else
302 
    return MAKEDI (0, val);
303 
}
304 
 
305 
DI
306 
CONVSIDI (val)
307 
     SI val;
308 
{
309 
  if (val < 0)
310 
    return MAKEDI (-1, val);
311 
  else
312 
    return MAKEDI (0, val);
313 
}
314 
 
315 
SI
316 
CONVDISI (val)
317 
     DI val;
318 
{
319 
  return GETLODI (val);
320 
}
321 
 
322 
#endif /* DI_FN_SUPPORT */
323 
 
324 
QI
325 
RORQI (val, shift)
326 
     QI  val;
327 
     int shift;
328 
{
329 
  if (shift != 0)
330 
    {
331 
      int remain = 8 - shift;
332 
      int mask = (1 << shift) - 1;
333 
      QI result = (val & mask) << remain;
334 
      mask = (1 << remain) - 1;
335 
      result |= (val >> shift) & mask;
336 
      return result;
337 
    }
338 
  return val;
339 
}
340 
 
341 
QI
342 
ROLQI (val, shift)
343 
     QI  val;
344 
     int shift;
345 
{
346 
  if (shift != 0)
347 
    {
348 
      int remain = 8 - shift;
349 
      int mask = (1 << remain) - 1;
350 
      QI result = (val & mask) << shift;
351 
      mask = (1 << shift) - 1;
352 
      result |= (val >> remain) & mask;
353 
      return result;
354 
    }
355 
  return val;
356 
}
357 
 
358 
HI
359 
RORHI (val, shift)
360 
     HI  val;
361 
     int shift;
362 
{
363 
  if (shift != 0)
364 
    {
365 
      int remain = 16 - shift;
366 
      int mask = (1 << shift) - 1;
367 
      HI result = (val & mask) << remain;
368 
      mask = (1 << remain) - 1;
369 
      result |= (val >> shift) & mask;
370 
      return result;
371 
    }
372 
  return val;
373 
}
374 
 
375 
HI
376 
ROLHI (val, shift)
377 
     HI  val;
378 
     int shift;
379 
{
380 
  if (shift != 0)
381 
    {
382 
      int remain = 16 - shift;
383 
      int mask = (1 << remain) - 1;
384 
      HI result = (val & mask) << shift;
385 
      mask = (1 << shift) - 1;
386 
      result |= (val >> remain) & mask;
387 
      return result;
388 
    }
389 
  return val;
390 
}
391 
 
392 
SI
393 
RORSI (val, shift)
394 
     SI  val;
395 
     int shift;
396 
{
397 
  if (shift != 0)
398 
    {
399 
      int remain = 32 - shift;
400 
      int mask = (1 << shift) - 1;
401 
      SI result = (val & mask) << remain;
402 
      mask = (1 << remain) - 1;
403 
      result |= (val >> shift) & mask;
404 
      return result;
405 
    }
406 
  return val;
407 
}
408 
 
409 
SI
410 
ROLSI (val, shift)
411 
     SI  val;
412 
     int shift;
413 
{
414 
  if (shift != 0)
415 
    {
416 
      int remain = 32 - shift;
417 
      int mask = (1 << remain) - 1;
418 
      SI result = (val & mask) << shift;
419 
      mask = (1 << shift) - 1;
420 
      result |= (val >> remain) & mask;
421 
      return result;
422 
    }
423 
 
424 
  return val;
425 
}
426 
 
427 
/* Emit an error message from CGEN RTL.  */
428 
 
429 
void
430 
cgen_rtx_error (SIM_CPU *cpu, const char * msg)
431 
{
432 
  SIM_DESC sd = CPU_STATE (cpu);
433 
 
434 
  sim_io_printf (sd, msg);
435 
  sim_io_printf (sd, "\n");
436 
 
437 
  sim_engine_halt (sd, cpu, NULL, CIA_GET (cpu), sim_stopped, SIM_SIGTRAP);
438 
}

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