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[/] [openrisc/] [trunk/] [gnu-src/] [gdb-6.8/] [sim/] [mips/] [m16e.igen] - Blame information for rev 298

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1 24 jeremybenn 
// -*- C -*-
2 
 
3 
// Simulator definition for the MIPS16e instructions.
4 
// Copyright (C) 2005 Free Software Foundation, Inc.
5 
// Contributed by Nigel Stephens (nigel@mips.com) and
6 
//                David Ung (davidu@mips.com) of MIPS Technologies.
7 
//
8 
// This file is part of GDB, the GNU debugger.
9 
//
10 
// This program is free software; you can redistribute it and/or modify
11 
// it under the terms of the GNU General Public License as published by
12 
// the Free Software Foundation; either version 3 of the License, or
13 
// (at your option) any later version.
14 
//
15 
// This program is distributed in the hope that it will be useful,
16 
// but WITHOUT ANY WARRANTY; without even the implied warranty of
17 
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
18 
// GNU General Public License for more details.
19 
//
20 
// You should have received a copy of the GNU General Public License
21 
// along with this program.  If not, see .
22 
 
23 
 
24 
11101,3.RX,100,10001:RR:16::SEB
25 
"seb r"
26 
*mips16e:
27 
{
28 
  TRACE_ALU_INPUT1 (GPR[TRX]);
29 
  GPR[TRX] = EXTEND8 (GPR[TRX]);
30 
  TRACE_ALU_RESULT (GPR[TRX]);
31 
}
32 
 
33 
 
34 
11101,3.RX,101,10001:RR:16::SEH
35 
"seh r"
36 
*mips16e:
37 
{
38 
  TRACE_ALU_INPUT1 (GPR[TRX]);
39 
  GPR[TRX] = EXTEND16 (GPR[TRX]);
40 
  TRACE_ALU_RESULT (GPR[TRX]);
41 
}
42 
 
43 
11101,3.RX,110,10001:RR:16::SEW
44 
"sew r"
45 
*mips16e:
46 
{
47 
  check_u64 (SD_, instruction_0);
48 
  TRACE_ALU_INPUT1 (GPR[TRX]);
49 
  GPR[TRX] = EXTEND32 (GPR[TRX]);
50 
  TRACE_ALU_RESULT (GPR[TRX]);
51 
}
52 
 
53 
11101,3.RX,000,10001:RR:16::ZEB
54 
"zeb r"
55 
*mips16e:
56 
{
57 
  TRACE_ALU_INPUT1 (GPR[TRX]);
58 
  GPR[TRX] =  (unsigned_word)(unsigned8)(GPR[TRX]);
59 
  TRACE_ALU_RESULT (GPR[TRX]);
60 
}
61 
 
62 
11101,3.RX,001,10001:RR:16::ZEH
63 
"zeh r"
64 
*mips16e:
65 
{
66 
  TRACE_ALU_INPUT1 (GPR[TRX]);
67 
  GPR[TRX] = (unsigned_word)(unsigned16)(GPR[TRX]);
68 
  TRACE_ALU_RESULT (GPR[TRX]);
69 
}
70 
 
71 
11101,3.RX,010,10001:RR:16::ZEW
72 
"zew r"
73 
*mips16e:
74 
{
75 
  check_u64 (SD_, instruction_0);
76 
  TRACE_ALU_INPUT1 (GPR[TRX]);
77 
  GPR[TRX] = (unsigned_word)(unsigned32)(GPR[TRX]);
78 
  TRACE_ALU_RESULT (GPR[TRX]);
79 
}
80 
 
81 
 
82 
11101,3.RX,100,00000:RR:16::JRC
83 
"jrc r"
84 
*mips16e:
85 
{
86 
  NIA = GPR[TRX];
87 
}
88 
 
89 
 
90 
11101,000,101,00000:RR:16::JRCRA
91 
"jrc ra"
92 
*mips16e:
93 
{
94 
  NIA = RA;
95 
}
96 
 
97 
 
98 
11101,3.RX,110,00000:RR:16::JALRC
99 
"jalrc r"
100 
*mips16e:
101 
{
102 
  RA = NIA;
103 
  NIA = GPR[TRX];
104 
}
105 
 
106 
 
107 
// format routines for save/restore
108 
:%s::::RAS:int ras
109 
*mips16e
110 
{
111 
  static char buf[10];
112 
  buf[0] = '\0';
113 
  if (ras & 4)
114 
    strcat (buf,"ra,");
115 
  if (ras & 2)
116 
    strcat (buf,"s0,");
117 
  if (ras & 1)
118 
    strcat (buf,"s1,");
119 
  return (buf);
120 
}
121 
 
122 
:%s::::XSREGS:int xsregs
123 
*mips16e
124 
{
125 
  if (xsregs > 6)
126 
    return "s2,s3,s4,s5,s6,s7,s8,";
127 
  if (xsregs > 5)
128 
    return "s2,s3,s4,s5,s6,s7,";
129 
  if (xsregs > 4)
130 
    return "s2,s3,s4,s5,s6,";
131 
  if (xsregs > 3)
132 
    return "s2,s3,s4,s5,";
133 
  if (xsregs > 2)
134 
    return "s2,s3,s4,";
135 
  if (xsregs > 1)
136 
    return "s2,s3,";
137 
  if (xsregs > 0)
138 
    return "s2,";
139 
  return "";
140 
}
141 
 
142 
:%s::::AREGS:int aregs
143 
*mips16e
144 
{
145 
  // Fixme: how is the arg/static distinction made by the assembler?
146 
  static const char * const aregstr[16] = {
147 
    "",
148 
    "A3,",
149 
    "A2,A3,",
150 
    "A1,A2,A3,",
151 
    "A0,A1,A2,A3,",
152 
    "a0,",
153 
    "a0,A3,",
154 
    "a0,A2,A3,",
155 
    "a0,A1,A2,A3,",
156 
    "a0,a1,",
157 
    "a0,a1,A3,",
158 
    "a0,a1,A2,A3,",
159 
    "a0,a1,a2,",
160 
    "a0,a1,a2,A3,",
161 
    "?,"
162 
  };
163 
  return aregstr[aregs];
164 
}
165 
 
166 
:compute:::int:SFRAME:FS:((FS == 0) ? 128 \: (FS << 3))
167 
:compute:::int:BFRAME:FSHI,FSLO:(((FSHI << 4) | FSLO) << 3)
168 
 
169 
:function:::void:do_save:int xsregs, int aregs, int ras0s1, int framesize
170 
{
171 
  unsigned_word temp;
172 
  int args, astatic;
173 
 
174 
  temp = GPR[29];
175 
 
176 
  /* writes are in the same order as the hardware description... */
177 
  switch (aregs) {
178 
  case 0: case 1: case 2: case 3: case 11:
179 
    args = 0;
180 
    break;
181 
  case 4: case 5: case 6: case 7:
182 
    args = 1;
183 
    break;
184 
  case 8: case 9: case 10:
185 
    args = 2;
186 
    break;
187 
  case 12: case 13:
188 
    args = 3;
189 
    break;
190 
  case 14:
191 
    args = 4;
192 
    break;
193 
  default:
194 
    sim_engine_abort (SD, CPU, CIA, "save: aregs=%d causes unpredictable results\n", aregs);
195 
  }
196 
  if (args > 0) {
197 
    do_store (SD_, AccessLength_WORD, temp, 0, GPR[4]);
198 
    if (args > 1) {
199 
      do_store (SD_,AccessLength_WORD, temp, 4 , GPR[5]);
200 
      if (args > 2) {
201 
        do_store (SD_,AccessLength_WORD, temp, 8 , GPR[6]);
202 
        if (args > 3) {
203 
          do_store (SD_,AccessLength_WORD, temp, 12, GPR[7]);
204 
        }
205 
      }
206 
    }
207 
  }
208 
 
209 
  if (ras0s1 & 4)
210 
    do_store (SD_,AccessLength_WORD, temp -= 4, 0, GPR[31]);
211 
 
212 
  switch (xsregs) {
213 
  case 7:
214 
    do_store (SD_,AccessLength_WORD, temp -= 4, 0, GPR[30]);
215 
  case 6:
216 
    do_store (SD_,AccessLength_WORD, temp -= 4, 0, GPR[23]);
217 
  case 5:
218 
    do_store (SD_,AccessLength_WORD, temp -= 4, 0, GPR[22]);
219 
  case 4:
220 
    do_store (SD_,AccessLength_WORD, temp -= 4, 0, GPR[21]);
221 
  case 3:
222 
    do_store (SD_,AccessLength_WORD, temp -= 4, 0, GPR[20]);
223 
  case 2:
224 
    do_store (SD_,AccessLength_WORD, temp -= 4, 0, GPR[19]);
225 
  case 1:
226 
    do_store (SD_,AccessLength_WORD, temp -= 4, 0, GPR[18]);
227 
  }
228 
 
229 
  if (ras0s1 & 1)
230 
    do_store (SD_,AccessLength_WORD, temp -= 4, 0, GPR[17]);
231 
  if (ras0s1 & 2)
232 
    do_store (SD_,AccessLength_WORD, temp -= 4, 0, GPR[16]);
233 
 
234 
  switch (aregs) {
235 
  case 0: case 4: case 8: case 12: case 14:
236 
    astatic = 0;
237 
    break;
238 
  case 1: case 5: case 9: case 13:
239 
    astatic = 1;
240 
    break;
241 
  case 2: case 6: case 10:
242 
    astatic = 2;
243 
    break;
244 
  case 3: case 7:
245 
    astatic = 3;
246 
    break;
247 
  case 11:
248 
    astatic = 4;
249 
    break;
250 
  default:
251 
    sim_engine_abort (SD, CPU, CIA, "save: aregs=%d causes unpredictable results\n", aregs);
252 
  }
253 
  if (astatic > 0) {
254 
    do_store (SD_, AccessLength_WORD, temp -= 4, 0, GPR[7]);
255 
    if (astatic > 1) {
256 
      do_store (SD_, AccessLength_WORD, temp -= 4, 0, GPR[6]);
257 
      if (astatic > 2) {
258 
        do_store (SD_, AccessLength_WORD, temp -= 4, 0, GPR[5]);
259 
        if (astatic > 3) {
260 
          do_store (SD_, AccessLength_WORD, temp -= 4, 0, GPR[4]);
261 
        }
262 
      }
263 
    }
264 
  }
265 
 
266 
  GPR[29] -= framesize;
267 
}
268 
 
269 
01100,100,1,3.RAS,4.FS:I8:16::SAVE
270 
"save %s,"
271 
*mips16e
272 
{
273 
  do_save (SD_, 0, 0, RAS, SFRAME);
274 
}
275 
 
276 
 
277 
11110,3.XSREGS,4.FSHI,4.AREGS + 01100,100,1,3.RAS,4.FSLO:EXT-I8:16::SAVE
278 
"save %s%s%s"
279 
*mips16e
280 
{
281 
  do_save (SD_, XSREGS, AREGS, RAS, BFRAME);
282 
}
283 
 
284 
 
285 
:function:::void:do_restore:int xsregs, int aregs, int ras0s1, int framesize
286 
*mips16e
287 
{
288 
  unsigned_word temp, temp2;
289 
  int astatic;
290 
 
291 
  temp = GPR[29] + framesize;
292 
  temp2 = temp;
293 
 
294 
  /* reads are in the same order as the hardware description... */
295 
 
296 
  if (ras0s1 & 4)
297 
    GPR[31] = EXTEND32 (do_load(SD_, AccessLength_WORD, temp -= 4, 0));
298 
 
299 
  switch (xsregs) {
300 
  case 7:
301 
    GPR[30] = EXTEND32 (do_load (SD_,AccessLength_WORD, temp -= 4, 0));
302 
  case 6:
303 
    GPR[23] = EXTEND32 (do_load (SD_,AccessLength_WORD, temp -= 4, 0));
304 
  case 5:
305 
    GPR[22] = EXTEND32 (do_load (SD_,AccessLength_WORD, temp -= 4, 0));
306 
  case 4:
307 
    GPR[21] = EXTEND32 (do_load (SD_,AccessLength_WORD, temp -= 4, 0));
308 
  case 3:
309 
    GPR[20] = EXTEND32 (do_load (SD_,AccessLength_WORD, temp -= 4, 0));
310 
  case 2:
311 
    GPR[19] = EXTEND32 (do_load (SD_,AccessLength_WORD, temp -= 4, 0));
312 
  case 1:
313 
    GPR[18] = EXTEND32 (do_load (SD_,AccessLength_WORD, temp -= 4, 0));
314 
  }
315 
 
316 
  if (ras0s1 & 1)
317 
    GPR[17] = EXTEND32 (do_load (SD_,AccessLength_WORD, temp -= 4, 0));
318 
  if (ras0s1 & 2)
319 
    GPR[16] = EXTEND32 (do_load (SD_,AccessLength_WORD, temp -= 4, 0));
320 
 
321 
  switch (aregs) {
322 
  case 0: case 4: case 8: case 12: case 14:
323 
    astatic = 0;
324 
    break;
325 
  case 1: case 5: case 9: case 13:
326 
    astatic = 1;
327 
    break;
328 
  case 2: case 6: case 10:
329 
    astatic = 2;
330 
    break;
331 
  case 3: case 7:
332 
    astatic = 3;
333 
    break;
334 
  case 11:
335 
    astatic = 4;
336 
    break;
337 
  default:
338 
    sim_engine_abort (SD, CPU, CIA, "save: aregs=%d causes unpredictable results\n", aregs);
339 
  }
340 
  if (astatic > 0) {
341 
    GPR[7] = EXTEND32 (do_load (SD_,AccessLength_WORD, temp -= 4, 0));
342 
    if (astatic > 1) {
343 
      GPR[6] = EXTEND32 (do_load (SD_,AccessLength_WORD, temp -= 4, 0));
344 
      if (astatic > 2) {
345 
        GPR[5] = EXTEND32 (do_load (SD_,AccessLength_WORD, temp -= 4, 0));
346 
        if (astatic > 3) {
347 
          GPR[4] = EXTEND32 (do_load (SD_,AccessLength_WORD, temp -= 4, 0));
348 
        }
349 
      }
350 
    }
351 
  }
352 
 
353 
  GPR[29] = temp2;
354 
}
355 
 
356 
01100,100,0,3.RAS,4.FS:I8:16::RESTORE
357 
"restore %s,"
358 
*mips16e
359 
{
360 
  do_restore (SD_,0,0,RAS,SFRAME);
361 
}
362 
 
363 
11110,3.XSREGS,4.FSHI,4.AREGS + 01100,100,0,3.RAS,4.FSLO:EXT-I8:16::RESTORE
364 
"restore %s%s%s"
365 
*mips16e
366 
{
367 
  do_restore (SD_,XSREGS,AREGS,RAS,BFRAME);
368 
}

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