1 # Simulator main loop for IQ2000. -*- C -*-
2 # Copyright (C) 1998-2019 Free Software Foundation, Inc.
3 # Contributed by Cygnus Solutions.
5 # This file is part of the GNU Simulators.
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 3 of the License, or
10 # (at your option) any later version.
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
18 # along with this program. If not, see <http://www.gnu.org/licenses/>.
21 # /bin/sh mainloop.in command
27 # extract-{simple,scache,pbb}
28 # {full,fast}-exec-{simple,scache,pbb}
30 # A target need only provide a "full" version of one of simple,scache,pbb.
31 # If the target wants it can also provide a fast version of same.
32 # It can't provide more than this, however for illustration's sake the IQ2000
33 # port provides examples of all.
35 # ??? After a few more ports are done, revisit.
36 # Will eventually need to machine generate a lot of this.
44 static INLINE const IDESC *
45 extract (SIM_CPU *current_cpu, PCADDR pc, CGEN_INSN_INT insn, ARGBUF *abuf,
48 const IDESC *id = @cpu@_decode (current_cpu, pc, insn, insn, abuf);
49 @cpu@_fill_argbuf (current_cpu, abuf, id, pc, fast_p);
52 int trace_p = PC_IN_TRACE_RANGE_P (current_cpu, pc);
53 int profile_p = PC_IN_PROFILE_RANGE_P (current_cpu, pc);
54 @cpu@_fill_argbuf_tp (current_cpu, abuf, trace_p, profile_p);
60 execute (SIM_CPU *current_cpu, SCACHE *sc, int fast_p)
64 /* Force R0 to zero before every insn. */
65 @cpu@_h_gr_set (current_cpu, 0, 0);
69 #if ! WITH_SEM_SWITCH_FAST
71 vpc = (*sc->argbuf.semantic.sem_fast) (current_cpu, sc);
73 vpc = (*sc->argbuf.semantic.sem_fast) (current_cpu, &sc->argbuf);
77 #endif /* WITH_SEM_SWITCH_FAST */
81 #if ! WITH_SEM_SWITCH_FULL
82 ARGBUF *abuf = &sc->argbuf;
83 const IDESC *idesc = abuf->idesc;
85 int virtual_p = CGEN_ATTR_VALUE (NULL, idesc->attrs, CGEN_INSN_VIRTUAL);
92 /* FIXME: call x-before */
93 if (ARGBUF_PROFILE_P (abuf))
94 PROFILE_COUNT_INSN (current_cpu, abuf->addr, idesc->num);
95 /* FIXME: Later make cover macros: PROFILE_INSN_{INIT,FINI}. */
96 if (PROFILE_MODEL_P (current_cpu)
97 && ARGBUF_PROFILE_P (abuf))
98 @cpu@_model_insn_before (current_cpu, 1 /*first_p*/);
99 CGEN_TRACE_INSN_INIT (current_cpu, abuf, 1);
100 CGEN_TRACE_INSN (current_cpu, idesc->idata,
101 (const struct argbuf *) abuf, abuf->addr);
104 vpc = (*sc->argbuf.semantic.sem_full) (current_cpu, sc);
106 vpc = (*sc->argbuf.semantic.sem_full) (current_cpu, abuf);
110 /* FIXME: call x-after */
111 if (PROFILE_MODEL_P (current_cpu)
112 && ARGBUF_PROFILE_P (abuf))
116 cycles = (*idesc->timing->model_fn) (current_cpu, sc);
117 @cpu@_model_insn_after (current_cpu, 1 /*last_p*/, cycles);
119 CGEN_TRACE_INSN_FINI (current_cpu, abuf, 1);
123 #endif /* WITH_SEM_SWITCH_FULL */
135 xextract-simple | xextract-scache)
137 # Inputs: current_cpu, vpc, sc, FAST_P
138 # Outputs: sc filled in
142 CGEN_INSN_INT insn = GETIMEMUSI (current_cpu, CPU2INSN(vpc));
143 extract (current_cpu, vpc, insn, SEM_ARGBUF (sc), FAST_P);
144 SEM_SKIP_COMPILE (current_cpu, sc, 1);
152 # Inputs: current_cpu, pc, sc, max_insns, FAST_P
154 # sc must be left pointing past the last created entry.
155 # pc must be left pointing past the last created entry.
156 # If the pbb is terminated by a cti insn, SET_CTI_VPC(sc) must be called
157 # to record the vpc of the cti insn.
158 # SET_INSN_COUNT(n) must be called to record number of real insns.
165 /* Is the CTI instruction at the end of the PBB a likely branch? */
168 while (max_insns > 0)
170 USI insn = GETIMEMUSI (current_cpu, CPU2INSN(pc));
172 idesc = extract (current_cpu, pc, insn, &sc->argbuf, FAST_P);
173 SEM_SKIP_COMPILE (current_cpu, sc, 1);
179 if (IDESC_CTI_P (idesc))
181 /* Likely branches annul their delay slot if the branch is
182 not taken by using the (skip ..) rtx. We'll rely on
184 likely_cti = (IDESC_SKIP_P (idesc));
186 SET_CTI_VPC (sc - 1);
188 if (CGEN_ATTR_VALUE (NULL, idesc->attrs, CGEN_INSN_DELAY_SLOT))
190 USI insn = GETIMEMUSI (current_cpu, CPU2INSN(pc));
191 idesc = extract (current_cpu, pc, insn, &sc->argbuf, FAST_P);
193 if (likely_cti && IDESC_CTI_P (idesc))
195 /* malformed program */
196 sim_io_eprintf (CPU_STATE (current_cpu),
197 "malformed program, \`%s' insn in branch likely delay slot\n",
198 CGEN_INSN_NAME (idesc->idata));
213 SET_INSN_COUNT (icount);
219 xfull-exec-* | xfast-exec-*)
221 # Inputs: current_cpu, sc, FAST_P
223 # vpc contains the address of the next insn to execute
227 #if (! FAST_P && WITH_SEM_SWITCH_FULL) || (FAST_P && WITH_SEM_SWITCH_FAST)
228 #define DEFINE_SWITCH
229 #include "sem-switch.c"
231 vpc = execute (current_cpu, vpc, FAST_P);
239 echo "Invalid argument to mainloop.in: $1" >&2