folkert/simh-testsetgenerator
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SCP: Add a special pseudo name "$" which is the value returned from the most recent EXAMINE command which can be used for register (or memory) indirect EXAMINE commands.

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To examine the instruction which the PC points at:
   sim> EXAMINE PC
   sim> EXAMINE -m $
This commit is contained in:
Mark Pizzolato 2015-04-01 10:29:14 -07:00
parent 975327dcac
commit d84883a4ce
1 changed files with 34 additions and 24 deletions
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16
scp.c
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@ -491,6 +491,7 @@ static int32 noqueue_time;
volatile int32 stop_cpu = 0; volatile int32 stop_cpu = 0;
static char **sim_argv; static char **sim_argv;
t_value *sim_eval = NULL; t_value *sim_eval = NULL;
t_value sim_last_val;
FILE *sim_log = NULL; /* log file */ FILE *sim_log = NULL; /* log file */
FILEREF *sim_log_ref = NULL; /* log file file reference */ FILEREF *sim_log_ref = NULL; /* log file file reference */
FILE *sim_deb = NULL; /* debug file */ FILE *sim_deb = NULL; /* debug file */
@ -696,6 +697,8 @@ static const char simh_help[] =
"++ but not including address+length\n" "++ but not including address+length\n"
"++STATE all registers in the device\n" "++STATE all registers in the device\n"
"++ALL all locations in the unit\n" "++ALL all locations in the unit\n"
"++$ the last value displayed by an EXAMINE command\n"
" interpreted as an address\n"
"3Switches\n" "3Switches\n"
" Switches can be used to control the format of display information:\n\n" " Switches can be used to control the format of display information:\n\n"
/***************** 80 character line width template *************************/ /***************** 80 character line width template *************************/
@ -6279,7 +6282,7 @@ for (rptr = lowr; rptr <= highr; rptr++) {
else else
Fprintf (ofile, "%s[%d]-%s[%d]: same as above\n", rptr->name, val_start+1, rptr->name, idx-1); Fprintf (ofile, "%s[%d]-%s[%d]: same as above\n", rptr->name, val_start+1, rptr->name, idx-1);
} }
last_val = val; sim_last_val = last_val = val;
val_start = idx; val_start = idx;
reason = ex_reg (ofile, val, flag, rptr, idx); reason = ex_reg (ofile, val, flag, rptr, idx);
if (reason != SCPE_OK) if (reason != SCPE_OK)
@ -6637,7 +6640,7 @@ for (i = 0, j = addr; i < sim_emax; i++, j = j + dptr->aincr) {
} }
} }
} }
sim_eval[i] = sim_eval[i] & mask; sim_last_val = sim_eval[i] = sim_eval[i] & mask;
} }
if ((reason != SCPE_OK) && (i == 0)) if ((reason != SCPE_OK) && (i == 0))
return reason; return reason;
@ -7073,9 +7076,15 @@ if (max && strncmp (cptr, "ALL", strlen ("ALL")) == 0) { /* ALL? */
*hi = max; *hi = max;
} }
else { else {
if (strncmp (cptr, "$", strlen ("$")) == 0) { /* $? */
tptr = cptr + strlen ("$");
*hi = *lo = (t_addr)sim_last_val;
}
else {
if (dptr && sim_vm_parse_addr) /* get low */ if (dptr && sim_vm_parse_addr) /* get low */
*lo = sim_vm_parse_addr (dptr, (char *)cptr, (char **)&tptr); *lo = sim_vm_parse_addr (dptr, (char *)cptr, (char **)&tptr);
else *lo = (t_addr) strtotv (cptr, &tptr, rdx); else
*lo = (t_addr) strtotv (cptr, &tptr, rdx);
if (cptr == tptr) /* error? */ if (cptr == tptr) /* error? */
return NULL; return NULL;
if ((*tptr == '-') || (*tptr == ':')) { /* range? */ if ((*tptr == '-') || (*tptr == ':')) { /* range? */
@ -7097,6 +7106,7 @@ else {
} }
else *hi = *lo; else *hi = *lo;
} }
}
if (term && (*tptr++ != term)) if (term && (*tptr++ != term))
return NULL; return NULL;
return tptr; return tptr;