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sim: mcore: convert to common reason/resume logic 

Switch over to the common event loop logic so we don't have to maintain
the exception/exit logic ourselves.
This commit is contained in:
Mike Frysinger 2015-11-15 00:09:32 -08:00
parent d2dfd24242
commit 02962cd9ea
3 changed files with 64 additions and 40 deletions
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15
sim/mcore/ChangeLog
View File

@ -1,3 +1,18 @@
2015-11-15 Mike Frysinger <vapier@gentoo.org>
* Makefile.in (SIM_OBJS): Add sim-reason.o and sim-resume.o.
* interp.c (struct mcore_regset): Delete exception.
(util): Add SIM_DESC and SIM_CPU args. Call sim_engine_halt instead
of setting cpu.asregs.exception.
(ILLEGAL): Define.
(sim_resume): Rename to ...
(step_once): ... this. Delete cpu.asregs.exception initialization.
Delete do/while statements while keeping the body. Replace SIGTRAP
usage with sim_engine_halt(SIM_SIGTRAP). Replace SIGILL usage with
ILLEGAL. Pass sd and cpu down to util.
(sim_engine_run): Define.
(sim_stop_reason): Delete.
2015-11-14 Mike Frysinger <vapier@gentoo.org>
* interp.c (sim_close): Delete.

2
sim/mcore/Makefile.in
View File

@ -24,6 +24,8 @@ SIM_OBJS = \
interp.o \
$(SIM_NEW_COMMON_OBJS) \
sim-hload.o \
sim-reason.o \
sim-resume.o \
sim-stop.o
## COMMON_POST_CONFIG_FRAG

87
sim/mcore/interp.c
View File

@ -113,7 +113,6 @@ struct mcore_regset
int stalls;
int cycles;
int insts;
int exception;
word * active_gregs;
};
@ -234,12 +233,12 @@ process_stub (SIM_DESC sd, int what)
}
static void
util (SIM_DESC sd, unsigned what)
util (SIM_DESC sd, SIM_CPU *scpu, unsigned what)
{
switch (what)
{
case 0: /* exit */
cpu.asregs.exception = SIGQUIT;
sim_engine_halt (sd, scpu, NULL, scpu->pc, sim_exited, cpu.gr[PARM1]);
break;
case 1: /* printf */
@ -314,10 +313,12 @@ int WLW;
static int tracing = 0;
void
sim_resume (SIM_DESC sd, int step, int siggnal)
#define ILLEGAL() \
sim_engine_halt (sd, scpu, NULL, pc, sim_stopped, SIM_SIGILL)
static void
step_once (SIM_DESC sd, SIM_CPU *scpu)
{
SIM_CPU *scpu = STATE_CPU (sd, 0);
int needfetch;
word ibuf;
word pc;
@ -331,7 +332,6 @@ sim_resume (SIM_DESC sd, int step, int siggnal)
word WLhash;
#endif
cpu.asregs.exception = step ? SIGTRAP: 0;
pc = CPU_PC_GET (scpu);
/* Fetch the initial instructions that we'll decode. */
@ -356,7 +356,7 @@ sim_resume (SIM_DESC sd, int step, int siggnal)
WLhash = WLhash & WL[w];
#endif
do
/* TODO: Unindent this block. */
{
word oldpc;
@ -447,8 +447,9 @@ sim_resume (SIM_DESC sd, int step, int siggnal)
switch RD
{
case 0x0: /* bkpt */
cpu.asregs.exception = SIGTRAP;
pc -= 2;
sim_engine_halt (sd, scpu, NULL, pc - 2,
sim_stopped, SIM_SIGTRAP);
break;
case 0x1: /* sync */
@ -492,23 +493,25 @@ sim_resume (SIM_DESC sd, int step, int siggnal)
break;
case 0x7:
cpu.asregs.exception = SIGILL; /* illegal */
ILLEGAL (); /* illegal */
break;
case 0x8: /* trap 0 */
case 0xA: /* trap 2 */
case 0xB: /* trap 3 */
cpu.asregs.exception = SIGTRAP;
sim_engine_halt (sd, scpu, NULL, pc,
sim_stopped, SIM_SIGTRAP);
break;
case 0xC: /* trap 4 */
case 0xD: /* trap 5 */
case 0xE: /* trap 6 */
cpu.asregs.exception = SIGILL; /* illegal */
ILLEGAL (); /* illegal */
break;
case 0xF: /* trap 7 */
cpu.asregs.exception = SIGTRAP; /* integer div-by-0 */
sim_engine_halt (sd, scpu, NULL, pc, /* integer div-by-0 */
sim_stopped, SIM_SIGTRAP);
break;
case 0x9: /* trap 1 */
@ -518,7 +521,7 @@ sim_resume (SIM_DESC sd, int step, int siggnal)
break;
case 0x1:
cpu.asregs.exception = SIGILL; /* illegal */
ILLEGAL (); /* illegal */
break;
case 0x2: /* mvc */
@ -778,7 +781,7 @@ sim_resume (SIM_DESC sd, int step, int siggnal)
break;
case 0x08: /* illegal */
case 0x09: /* illegal*/
cpu.asregs.exception = SIGILL;
ILLEGAL ();
break;
case 0x0A: /* movf */
if (C_OFF())
@ -815,7 +818,7 @@ sim_resume (SIM_DESC sd, int step, int siggnal)
if (r <= LAST_VALID_CREG)
cpu.gr[RD] = cpu.cr[r];
else
cpu.asregs.exception = SIGILL;
ILLEGAL ();
}
break;
@ -855,7 +858,7 @@ sim_resume (SIM_DESC sd, int step, int siggnal)
if (r <= LAST_VALID_CREG)
cpu.cr[r] = cpu.gr[RD];
else
cpu.asregs.exception = SIGILL;
ILLEGAL ();
/* we might have changed register sets... */
if (SR_AF ())
@ -917,7 +920,7 @@ sim_resume (SIM_DESC sd, int step, int siggnal)
cpu.gr[RD] - (IMM5 + 1);
break;
case 0x26: case 0x27: /* illegal */
cpu.asregs.exception = SIGILL;
ILLEGAL ();
break;
case 0x28: case 0x29: /* rsubi */
cpu.gr[RD] =
@ -979,7 +982,7 @@ sim_resume (SIM_DESC sd, int step, int siggnal)
else
{
/* illegal */
cpu.asregs.exception = SIGILL;
ILLEGAL ();
}
}
break;
@ -1038,7 +1041,7 @@ sim_resume (SIM_DESC sd, int step, int siggnal)
else
{
/* illegal */
cpu.asregs.exception = SIGILL;
ILLEGAL ();
}
break;
}
@ -1106,16 +1109,16 @@ sim_resume (SIM_DESC sd, int step, int siggnal)
case 0x44: case 0x45: case 0x46: case 0x47:
case 0x48: case 0x49: case 0x4A: case 0x4B:
case 0x4C: case 0x4D: case 0x4E: case 0x4F:
cpu.asregs.exception = SIGILL;
ILLEGAL ();
break;
case 0x50:
util (sd, inst & 0xFF);
util (sd, scpu, inst & 0xFF);
break;
case 0x51: case 0x52: case 0x53:
case 0x54: case 0x55: case 0x56: case 0x57:
case 0x58: case 0x59: case 0x5A: case 0x5B:
case 0x5C: case 0x5D: case 0x5E: case 0x5F:
cpu.asregs.exception = SIGILL;
ILLEGAL ();
break;
case 0x60: case 0x61: case 0x62: case 0x63: /* movi */
case 0x64: case 0x65: case 0x66: case 0x67:
@ -1123,7 +1126,7 @@ sim_resume (SIM_DESC sd, int step, int siggnal)
break;
case 0x68: case 0x69: case 0x6A: case 0x6B:
case 0x6C: case 0x6D: case 0x6E: case 0x6F: /* illegal */
cpu.asregs.exception = SIGILL;
ILLEGAL ();
break;
case 0x71: case 0x72: case 0x73:
case 0x74: case 0x75: case 0x76: case 0x77:
@ -1253,7 +1256,6 @@ sim_resume (SIM_DESC sd, int step, int siggnal)
needfetch = 0;
}
}
while (!cpu.asregs.exception);
/* Hide away the things we've cached while executing. */
CPU_PC_SET (scpu, pc);
@ -1263,6 +1265,26 @@ sim_resume (SIM_DESC sd, int step, int siggnal)
cpu.asregs.cycles += memops * memcycles; /* and memop cycle delays */
}
void
sim_engine_run (SIM_DESC sd,
int next_cpu_nr, /* ignore */
int nr_cpus, /* ignore */
int siggnal) /* ignore */
{
sim_cpu *scpu;
SIM_ASSERT (STATE_MAGIC (sd) == SIM_MAGIC_NUMBER);
scpu = STATE_CPU (sd, 0);
while (1)
{
step_once (sd, scpu);
if (sim_events_tick (sd))
sim_events_process (sd);
}
}
int
sim_store_register (SIM_DESC sd, int rn, unsigned char *memory, int length)
{
@ -1302,21 +1324,6 @@ sim_fetch_register (SIM_DESC sd, int rn, unsigned char *memory, int length)
return 0;
}
void
sim_stop_reason (SIM_DESC sd, enum sim_stop *reason, int *sigrc)
{
if (cpu.asregs.exception == SIGQUIT)
{
* reason = sim_exited;
* sigrc = cpu.gr[PARM1];
}
else
{
* reason = sim_stopped;
* sigrc = cpu.asregs.exception;
}
}
void
sim_info (SIM_DESC sd, int verbose)
{