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moved pio tests to R-mode so that V-mode doesn't check for pio

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Perf increase from 12.3 MIPS to 12.5 MIPS
This commit is contained in:
Jim 2007-09-03 00:00:00 -04:00
parent 3e4c98c296
commit 8bdffd4e56
1 changed files with 13 additions and 28 deletions
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41
em.c
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@ -4207,9 +4207,6 @@ fetch:
crs[MODALS] &= 077777; /* inhibit interrupts */
}
/* as a speedup later, fetch 32/64 bits (or the rest of the page)
and maintain a prefetch queue */
gvp->prevpc = RP;
#if 0
/* NOTE: Rev 21 Sys Arch Guide, 2nd Ed, pg 3-32 says:
@ -6538,25 +6535,9 @@ d_smcs: /* 0101200 */
RESTRICT();
goto fetch;
#if 0
/* NOTE: this is the clock display instruction skip, but appears
goofy to me, and looks more like an I/O instruction:
unrecognized skip instruction 101704 at 6/3174
Fatal error: instruction #106825755 at 6/3173: 101704 677
keys = 14200, modals=100177
*/
if (inst == 0101704) { /* skip if machine check flop is set */
TRACE(T_FLOW, " clock SKP?\n");
INCRP;
goto fetch;
#endif
d_badgen:
TRACEA(" unrecognized generic instruction!\n");
printf("#%d: %o/%o: Unrecognized generic instruction '%o!\n", gvp->instcount, RPH, RPL, inst);
printf("em: #%d %o/%o: Unrecognized generic instruction '%o!\n", gvp->instcount, RPH, RPL, inst);
//gvp->traceflags = ~TB_MAP;
fault(UIIFAULT, RPL, RP);
fatal(NULL);
@ -8441,14 +8422,6 @@ imodepcl:
nonimode:
/* here for non-generic instructions: memory references or pio */
/* pio can only occur in S/R modes */
if (!(crs[KEYS] & 010000) && (inst & 036000) == 030000) {
pio(inst);
goto fetch;
}
/* get x bit and adjust opcode so that PMA manual opcode
references can be used directly, ie, if the PMA manual says the
opcode is '15 02, then 01502 can be used here. If the PMA
@ -8489,13 +8462,25 @@ nonimode:
stopwatch_push(&sw_ea);
switch ((crs[KEYS] >> 10) & 7) {
case 0: /* 16S */
if (opcode == 01400) {
pio(inst);
goto fetch;
}
ea = ea16s(inst, x);
break;
case 1: /* 32S */
if (opcode == 01400) {
pio(inst);
goto fetch;
}
ea = ea32s(inst, x);
break;
case 2: /* 64R */
case 3: /* 32R */
if (opcode == 01400) {
pio(inst);
goto fetch;
}
ea = ea32r64r(earp, inst, x, &opcode);
break;
case 4: /* 32I */