1 /* m32rx simulator support code
2 Copyright (C) 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 m32rxf
22 #define WANT_CPU_M32RXF
28 /* The contents of BUF are in target byte order. */
31 m32rxf_fetch_register (SIM_CPU *current_cpu, int rn, unsigned char *buf, int len)
33 return m32rbf_fetch_register (current_cpu, rn, buf, len);
36 /* The contents of BUF are in target byte order. */
39 m32rxf_store_register (SIM_CPU *current_cpu, int rn, unsigned char *buf, int len)
41 return m32rbf_store_register (current_cpu, rn, buf, len);
44 /* Cover fns to get/set the control registers.
45 FIXME: Duplicated from m32r.c. The issue is structure offsets. */
48 m32rxf_h_cr_get_handler (SIM_CPU *current_cpu, UINT cr)
52 case H_CR_PSW : /* psw */
53 return (((CPU (h_bpsw) & 0xc1) << 8)
54 | ((CPU (h_psw) & 0xc0) << 0)
56 case H_CR_BBPSW : /* backup backup psw */
57 return CPU (h_bbpsw) & 0xc1;
58 case H_CR_CBR : /* condition bit */
60 case H_CR_SPI : /* interrupt stack pointer */
62 return CPU (h_gr[H_GR_SP]);
64 return CPU (h_cr[H_CR_SPI]);
65 case H_CR_SPU : /* user stack pointer */
67 return CPU (h_gr[H_GR_SP]);
69 return CPU (h_cr[H_CR_SPU]);
70 case H_CR_BPC : /* backup pc */
71 return CPU (h_cr[H_CR_BPC]) & 0xfffffffe;
72 case H_CR_BBPC : /* backup backup pc */
73 return CPU (h_cr[H_CR_BBPC]) & 0xfffffffe;
74 case 4 : /* ??? unspecified, but apparently available */
75 case 5 : /* ??? unspecified, but apparently available */
76 return CPU (h_cr[cr]);
83 m32rxf_h_cr_set_handler (SIM_CPU *current_cpu, UINT cr, USI newval)
87 case H_CR_PSW : /* psw */
89 int old_sm = (CPU (h_psw) & 0x80) != 0;
90 int new_sm = (newval & 0x80) != 0;
91 CPU (h_bpsw) = (newval >> 8) & 0xff;
92 CPU (h_psw) = newval & 0xff;
93 SET_H_COND (newval & 1);
94 /* When switching stack modes, update the registers. */
99 /* Switching user -> system. */
100 CPU (h_cr[H_CR_SPU]) = CPU (h_gr[H_GR_SP]);
101 CPU (h_gr[H_GR_SP]) = CPU (h_cr[H_CR_SPI]);
105 /* Switching system -> user. */
106 CPU (h_cr[H_CR_SPI]) = CPU (h_gr[H_GR_SP]);
107 CPU (h_gr[H_GR_SP]) = CPU (h_cr[H_CR_SPU]);
112 case H_CR_BBPSW : /* backup backup psw */
113 CPU (h_bbpsw) = newval & 0xff;
115 case H_CR_CBR : /* condition bit */
116 SET_H_COND (newval & 1);
118 case H_CR_SPI : /* interrupt stack pointer */
120 CPU (h_gr[H_GR_SP]) = newval;
122 CPU (h_cr[H_CR_SPI]) = newval;
124 case H_CR_SPU : /* user stack pointer */
126 CPU (h_gr[H_GR_SP]) = newval;
128 CPU (h_cr[H_CR_SPU]) = newval;
130 case H_CR_BPC : /* backup pc */
131 CPU (h_cr[H_CR_BPC]) = newval;
133 case H_CR_BBPC : /* backup backup pc */
134 CPU (h_cr[H_CR_BBPC]) = newval;
136 case 4 : /* ??? unspecified, but apparently available */
137 case 5 : /* ??? unspecified, but apparently available */
138 CPU (h_cr[cr]) = newval;
146 /* Cover fns to access h-psw. */
149 m32rxf_h_psw_get_handler (SIM_CPU *current_cpu)
151 return (CPU (h_psw) & 0xfe) | (CPU (h_cond) & 1);
155 m32rxf_h_psw_set_handler (SIM_CPU *current_cpu, UQI newval)
157 CPU (h_psw) = newval;
158 CPU (h_cond) = newval & 1;
161 /* Cover fns to access h-accum. */
164 m32rxf_h_accum_get_handler (SIM_CPU *current_cpu)
166 /* Sign extend the top 8 bits. */
168 r = ANDDI (CPU (h_accum), MAKEDI (0xffffff, 0xffffffff));
169 r = XORDI (r, MAKEDI (0x800000, 0));
170 r = SUBDI (r, MAKEDI (0x800000, 0));
175 m32rxf_h_accum_set_handler (SIM_CPU *current_cpu, DI newval)
177 CPU (h_accum) = newval;
180 /* Cover fns to access h-accums. */
183 m32rxf_h_accums_get_handler (SIM_CPU *current_cpu, UINT regno)
185 /* FIXME: Yes, this is just a quick hack. */
190 r = CPU (h_accums[1]);
191 /* Sign extend the top 8 bits. */
192 r = ANDDI (r, MAKEDI (0xffffff, 0xffffffff));
193 r = XORDI (r, MAKEDI (0x800000, 0));
194 r = SUBDI (r, MAKEDI (0x800000, 0));
199 m32rxf_h_accums_set_handler (SIM_CPU *current_cpu, UINT regno, DI newval)
201 /* FIXME: Yes, this is just a quick hack. */
203 CPU (h_accum) = newval;
205 CPU (h_accums[1]) = newval;
208 #if WITH_PROFILE_MODEL_P
210 /* Initialize cycle counting for an insn.
211 FIRST_P is non-zero if this is the first insn in a set of parallel
215 m32rxf_model_insn_before (SIM_CPU *cpu, int first_p)
217 m32rbf_model_insn_before (cpu, first_p);
220 /* Record the cycles computed for an insn.
221 LAST_P is non-zero if this is the last insn in a set of parallel insns,
222 and we update the total cycle count.
223 CYCLES is the cycle count of the insn. */
226 m32rxf_model_insn_after (SIM_CPU *cpu, int last_p, int cycles)
228 m32rbf_model_insn_after (cpu, last_p, cycles);
232 check_load_stall (SIM_CPU *cpu, int regno)
234 UINT h_gr = CPU_M32R_MISC_PROFILE (cpu)->load_regs;
237 && (h_gr & (1 << regno)) != 0)
239 CPU_M32R_MISC_PROFILE (cpu)->load_stall += 2;
240 if (TRACE_INSN_P (cpu))
241 cgen_trace_printf (cpu, " ; Load stall of 2 cycles.");
246 m32rxf_model_m32rx_u_exec (SIM_CPU *cpu, const IDESC *idesc,
247 int unit_num, int referenced,
248 INT sr, INT sr2, INT dr)
250 check_load_stall (cpu, sr);
251 check_load_stall (cpu, sr2);
252 return idesc->timing->units[unit_num].done;
256 m32rxf_model_m32rx_u_cmp (SIM_CPU *cpu, const IDESC *idesc,
257 int unit_num, int referenced,
260 check_load_stall (cpu, src1);
261 check_load_stall (cpu, src2);
262 return idesc->timing->units[unit_num].done;
266 m32rxf_model_m32rx_u_mac (SIM_CPU *cpu, const IDESC *idesc,
267 int unit_num, int referenced,
270 check_load_stall (cpu, src1);
271 check_load_stall (cpu, src2);
272 return idesc->timing->units[unit_num].done;
276 m32rxf_model_m32rx_u_cti (SIM_CPU *cpu, const IDESC *idesc,
277 int unit_num, int referenced,
280 PROFILE_DATA *profile = CPU_PROFILE_DATA (cpu);
281 int taken_p = (referenced & (1 << 1)) != 0;
283 check_load_stall (cpu, sr);
286 CPU_M32R_MISC_PROFILE (cpu)->cti_stall += 2;
287 PROFILE_MODEL_TAKEN_COUNT (profile) += 1;
290 PROFILE_MODEL_UNTAKEN_COUNT (profile) += 1;
291 return idesc->timing->units[unit_num].done;
295 m32rxf_model_m32rx_u_load (SIM_CPU *cpu, const IDESC *idesc,
296 int unit_num, int referenced,
299 CPU_M32R_MISC_PROFILE (cpu)->load_regs_pending |= (1 << dr);
300 return idesc->timing->units[unit_num].done;
304 m32rxf_model_m32rx_u_store (SIM_CPU *cpu, const IDESC *idesc,
305 int unit_num, int referenced,
308 return idesc->timing->units[unit_num].done;
311 #endif /* WITH_PROFILE_MODEL_P */