1 /* m32r simulator support code
2 Copyright (C) 1996, 1997, 1998 Free Software Foundation, Inc.
3 Contributed by Cygnus Support.
5 This file is part of GDB, the GNU debugger.
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)
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.
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. */
21 #define WANT_CPU m32rbf
22 #define WANT_CPU_M32RBF
28 /* Decode gdb ctrl register number. */
31 m32r_decode_gdb_ctrl_regnum (int gdb_regnum)
35 case PSW_REGNUM : return H_CR_PSW;
36 case CBR_REGNUM : return H_CR_CBR;
37 case SPI_REGNUM : return H_CR_SPI;
38 case SPU_REGNUM : return H_CR_SPU;
39 case BPC_REGNUM : return H_CR_BPC;
40 case BBPSW_REGNUM : return H_CR_BBPSW;
41 case BBPC_REGNUM : return H_CR_BBPC;
46 /* The contents of BUF are in target byte order. */
49 m32rbf_fetch_register (SIM_CPU *current_cpu, int rn, unsigned char *buf, int len)
51 int mach = MACH_NUM (CPU_MACH (current_cpu));
54 SETTWI (buf, a_m32r_h_gr_get (current_cpu, rn));
65 SETTWI (buf, a_m32r_h_cr_get (current_cpu,
66 m32r_decode_gdb_ctrl_regnum (rn)));
69 if (mach == MACH_M32R)
70 SETTWI (buf, m32rbf_h_pc_get (current_cpu));
72 SETTWI (buf, m32rxf_h_pc_get (current_cpu));
75 if (mach == MACH_M32R)
76 SETTWI (buf, GETLODI (m32rbf_h_accum_get (current_cpu)));
78 SETTWI (buf, GETLODI (m32rxf_h_accum_get (current_cpu)));
81 if (mach == MACH_M32R)
82 SETTWI (buf, GETHIDI (m32rbf_h_accum_get (current_cpu)));
84 SETTWI (buf, GETHIDI (m32rxf_h_accum_get (current_cpu)));
93 /* The contents of BUF are in target byte order. */
96 m32rbf_store_register (SIM_CPU *current_cpu, int rn, unsigned char *buf, int len)
98 int mach = MACH_NUM (CPU_MACH (current_cpu));
101 a_m32r_h_gr_set (current_cpu, rn, GETTWI (buf));
112 a_m32r_h_cr_set (current_cpu,
113 m32r_decode_gdb_ctrl_regnum (rn),
117 if (mach == MACH_M32R)
118 m32rbf_h_pc_set (current_cpu, GETTWI (buf));
120 m32rxf_h_pc_set (current_cpu, GETTWI (buf));
125 if (mach == MACH_M32R)
126 val = m32rbf_h_accum_get (current_cpu);
128 val = m32rxf_h_accum_get (current_cpu);
129 SETLODI (val, GETTWI (buf));
130 if (mach == MACH_M32R)
131 m32rbf_h_accum_set (current_cpu, val);
133 m32rxf_h_accum_set (current_cpu, val);
139 if (mach == MACH_M32R)
140 val = m32rbf_h_accum_get (current_cpu);
142 val = m32rxf_h_accum_get (current_cpu);
143 SETHIDI (val, GETTWI (buf));
144 if (mach == MACH_M32R)
145 m32rbf_h_accum_set (current_cpu, val);
147 m32rxf_h_accum_set (current_cpu, val);
157 /* Cover fns for mach independent register accesses. */
160 a_m32r_h_gr_get (SIM_CPU *current_cpu, UINT regno)
162 switch (MACH_NUM (CPU_MACH (current_cpu)))
164 #ifdef HAVE_CPU_M32RBF
166 return m32rbf_h_gr_get (current_cpu, regno);
168 #ifdef HAVE_CPU_M32RXF
170 return m32rxf_h_gr_get (current_cpu, regno);
178 a_m32r_h_gr_set (SIM_CPU *current_cpu, UINT regno, SI newval)
180 switch (MACH_NUM (CPU_MACH (current_cpu)))
182 #ifdef HAVE_CPU_M32RBF
184 m32rbf_h_gr_set (current_cpu, regno, newval);
187 #ifdef HAVE_CPU_M32RXF
189 m32rxf_h_gr_set (current_cpu, regno, newval);
198 a_m32r_h_cr_get (SIM_CPU *current_cpu, UINT regno)
200 switch (MACH_NUM (CPU_MACH (current_cpu)))
202 #ifdef HAVE_CPU_M32RBF
204 return m32rbf_h_cr_get (current_cpu, regno);
206 #ifdef HAVE_CPU_M32RXF
208 return m32rxf_h_cr_get (current_cpu, regno);
216 a_m32r_h_cr_set (SIM_CPU *current_cpu, UINT regno, USI newval)
218 switch (MACH_NUM (CPU_MACH (current_cpu)))
220 #ifdef HAVE_CPU_M32RBF
222 m32rbf_h_cr_set (current_cpu, regno, newval);
225 #ifdef HAVE_CPU_M32RXF
227 m32rxf_h_cr_set (current_cpu, regno, newval);
236 m32rbf_h_cr_get_handler (SIM_CPU *current_cpu, UINT cr)
240 case H_CR_PSW : /* psw */
241 return (((CPU (h_bpsw) & 0xc1) << 8)
242 | ((CPU (h_psw) & 0xc0) << 0)
244 case H_CR_BBPSW : /* backup backup psw */
245 return CPU (h_bbpsw) & 0xc1;
246 case H_CR_CBR : /* condition bit */
247 return GET_H_COND ();
248 case H_CR_SPI : /* interrupt stack pointer */
250 return CPU (h_gr[H_GR_SP]);
252 return CPU (h_cr[H_CR_SPI]);
253 case H_CR_SPU : /* user stack pointer */
255 return CPU (h_gr[H_GR_SP]);
257 return CPU (h_cr[H_CR_SPU]);
258 case H_CR_BPC : /* backup pc */
259 return CPU (h_cr[H_CR_BPC]) & 0xfffffffe;
260 case H_CR_BBPC : /* backup backup pc */
261 return CPU (h_cr[H_CR_BBPC]) & 0xfffffffe;
262 case 4 : /* ??? unspecified, but apparently available */
263 case 5 : /* ??? unspecified, but apparently available */
264 return CPU (h_cr[cr]);
271 m32rbf_h_cr_set_handler (SIM_CPU *current_cpu, UINT cr, USI newval)
275 case H_CR_PSW : /* psw */
277 int old_sm = (CPU (h_psw) & 0x80) != 0;
278 int new_sm = (newval & 0x80) != 0;
279 CPU (h_bpsw) = (newval >> 8) & 0xff;
280 CPU (h_psw) = newval & 0xff;
281 SET_H_COND (newval & 1);
282 /* When switching stack modes, update the registers. */
283 if (old_sm != new_sm)
287 /* Switching user -> system. */
288 CPU (h_cr[H_CR_SPU]) = CPU (h_gr[H_GR_SP]);
289 CPU (h_gr[H_GR_SP]) = CPU (h_cr[H_CR_SPI]);
293 /* Switching system -> user. */
294 CPU (h_cr[H_CR_SPI]) = CPU (h_gr[H_GR_SP]);
295 CPU (h_gr[H_GR_SP]) = CPU (h_cr[H_CR_SPU]);
300 case H_CR_BBPSW : /* backup backup psw */
301 CPU (h_bbpsw) = newval & 0xff;
303 case H_CR_CBR : /* condition bit */
304 SET_H_COND (newval & 1);
306 case H_CR_SPI : /* interrupt stack pointer */
308 CPU (h_gr[H_GR_SP]) = newval;
310 CPU (h_cr[H_CR_SPI]) = newval;
312 case H_CR_SPU : /* user stack pointer */
314 CPU (h_gr[H_GR_SP]) = newval;
316 CPU (h_cr[H_CR_SPU]) = newval;
318 case H_CR_BPC : /* backup pc */
319 CPU (h_cr[H_CR_BPC]) = newval;
321 case H_CR_BBPC : /* backup backup pc */
322 CPU (h_cr[H_CR_BBPC]) = newval;
324 case 4 : /* ??? unspecified, but apparently available */
325 case 5 : /* ??? unspecified, but apparently available */
326 CPU (h_cr[cr]) = newval;
334 /* Cover fns to access h-psw. */
337 m32rbf_h_psw_get_handler (SIM_CPU *current_cpu)
339 return (CPU (h_psw) & 0xfe) | (CPU (h_cond) & 1);
343 m32rbf_h_psw_set_handler (SIM_CPU *current_cpu, UQI newval)
345 CPU (h_psw) = newval;
346 CPU (h_cond) = newval & 1;
349 /* Cover fns to access h-accum. */
352 m32rbf_h_accum_get_handler (SIM_CPU *current_cpu)
354 /* Sign extend the top 8 bits. */
357 r = ANDDI (CPU (h_accum), MAKEDI (0xffffff, 0xffffffff));
358 r = XORDI (r, MAKEDI (0x800000, 0));
359 r = SUBDI (r, MAKEDI (0x800000, 0));
365 hi = ((hi & 0xffffff) ^ 0x800000) - 0x800000;
372 m32rbf_h_accum_set_handler (SIM_CPU *current_cpu, DI newval)
374 CPU (h_accum) = newval;
377 #if WITH_PROFILE_MODEL_P
379 /* FIXME: Some of these should be inline or macros. Later. */
381 /* Initialize cycle counting for an insn.
382 FIRST_P is non-zero if this is the first insn in a set of parallel
386 m32rbf_model_insn_before (SIM_CPU *cpu, int first_p)
388 M32R_MISC_PROFILE *mp = CPU_M32R_MISC_PROFILE (cpu);
393 mp->load_regs_pending = 0;
394 mp->biggest_cycles = 0;
398 /* Record the cycles computed for an insn.
399 LAST_P is non-zero if this is the last insn in a set of parallel insns,
400 and we update the total cycle count.
401 CYCLES is the cycle count of the insn. */
404 m32rbf_model_insn_after (SIM_CPU *cpu, int last_p, int cycles)
406 PROFILE_DATA *p = CPU_PROFILE_DATA (cpu);
407 M32R_MISC_PROFILE *mp = CPU_M32R_MISC_PROFILE (cpu);
408 unsigned long total = cycles + mp->cti_stall + mp->load_stall;
412 unsigned long biggest = total > mp->biggest_cycles ? total : mp->biggest_cycles;
413 PROFILE_MODEL_TOTAL_CYCLES (p) += biggest;
414 PROFILE_MODEL_CUR_INSN_CYCLES (p) = total;
418 /* Here we take advantage of the fact that !last_p -> first_p. */
419 mp->biggest_cycles = total;
420 PROFILE_MODEL_CUR_INSN_CYCLES (p) = total;
423 /* Branch and load stall counts are recorded independently of the
424 total cycle count. */
425 PROFILE_MODEL_CTI_STALL_CYCLES (p) += mp->cti_stall;
426 PROFILE_MODEL_LOAD_STALL_CYCLES (p) += mp->load_stall;
428 mp->load_regs = mp->load_regs_pending;
432 check_load_stall (SIM_CPU *cpu, int regno)
434 UINT h_gr = CPU_M32R_MISC_PROFILE (cpu)->load_regs;
437 && (h_gr & (1 << regno)) != 0)
439 CPU_M32R_MISC_PROFILE (cpu)->load_stall += 2;
440 if (TRACE_INSN_P (cpu))
441 cgen_trace_printf (cpu, " ; Load stall of 2 cycles.");
446 m32rbf_model_m32r_d_u_exec (SIM_CPU *cpu, const IDESC *idesc,
447 int unit_num, int referenced,
448 INT sr, INT sr2, INT dr)
450 check_load_stall (cpu, sr);
451 check_load_stall (cpu, sr2);
452 return idesc->timing->units[unit_num].done;
456 m32rbf_model_m32r_d_u_cmp (SIM_CPU *cpu, const IDESC *idesc,
457 int unit_num, int referenced,
460 check_load_stall (cpu, src1);
461 check_load_stall (cpu, src2);
462 return idesc->timing->units[unit_num].done;
466 m32rbf_model_m32r_d_u_mac (SIM_CPU *cpu, const IDESC *idesc,
467 int unit_num, int referenced,
470 check_load_stall (cpu, src1);
471 check_load_stall (cpu, src2);
472 return idesc->timing->units[unit_num].done;
476 m32rbf_model_m32r_d_u_cti (SIM_CPU *cpu, const IDESC *idesc,
477 int unit_num, int referenced,
480 PROFILE_DATA *profile = CPU_PROFILE_DATA (cpu);
481 int taken_p = (referenced & (1 << 1)) != 0;
483 check_load_stall (cpu, sr);
486 CPU_M32R_MISC_PROFILE (cpu)->cti_stall += 2;
487 PROFILE_MODEL_TAKEN_COUNT (profile) += 1;
490 PROFILE_MODEL_UNTAKEN_COUNT (profile) += 1;
491 return idesc->timing->units[unit_num].done;
495 m32rbf_model_m32r_d_u_load (SIM_CPU *cpu, const IDESC *idesc,
496 int unit_num, int referenced,
499 CPU_M32R_MISC_PROFILE (cpu)->load_regs_pending |= (1 << dr);
500 check_load_stall (cpu, sr);
501 return idesc->timing->units[unit_num].done;
505 m32rbf_model_m32r_d_u_store (SIM_CPU *cpu, const IDESC *idesc,
506 int unit_num, int referenced,
509 check_load_stall (cpu, src1);
510 check_load_stall (cpu, src2);
511 return idesc->timing->units[unit_num].done;
515 m32rbf_model_test_u_exec (SIM_CPU *cpu, const IDESC *idesc,
516 int unit_num, int referenced)
518 return idesc->timing->units[unit_num].done;
521 #endif /* WITH_PROFILE_MODEL_P */