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Fix brf0{t,f}.s <label> -> instruction not to execute instruction if branch succeeds

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Michael Meissner
1996-09-15 03:46:52 +00:00
parent ad0d14e7a2
commit 215ac9533c
2 changed files with 19 additions and 5 deletions
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5
sim/d10v/ChangeLog
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@ -1,3 +1,8 @@
Sat Sep 14 22:18:43 1996 Michael Meissner <meissner@tiktok.cygnus.com>
* interp.c (do_2_short): If the instruction encodes jump->ins,
don't do the second instruction if the jump succeeds.
Fri Sep 13 22:35:19 1996 Michael Meissner <meissner@tiktok.cygnus.com> Fri Sep 13 22:35:19 1996 Michael Meissner <meissner@tiktok.cygnus.com>
* simops.c (OP_5F00): Use unknown traps to print all GPRs, * simops.c (OP_5F00): Use unknown traps to print all GPRs,

9
sim/d10v/interp.c
View File

@ -158,12 +158,15 @@ do_long (ins)
ins_type_counters[ (int)State.ins_type ]++; ins_type_counters[ (int)State.ins_type ]++;
(h->ops->func)(); (h->ops->func)();
} }
static void static void
do_2_short (ins1, ins2, leftright) do_2_short (ins1, ins2, leftright)
uint16 ins1, ins2; uint16 ins1, ins2;
enum _leftright leftright; enum _leftright leftright;
{ {
struct hash_entry *h; struct hash_entry *h;
reg_t orig_pc = PC;
#ifdef DEBUG #ifdef DEBUG
if ((d10v_debug & DEBUG_INSTRUCTION) != 0) if ((d10v_debug & DEBUG_INSTRUCTION) != 0)
(*d10v_callback->printf_filtered) (d10v_callback, "do_2_short 0x%x (%s) -> 0x%x\n", (*d10v_callback->printf_filtered) (d10v_callback, "do_2_short 0x%x (%s) -> 0x%x\n",
@ -175,12 +178,18 @@ do_2_short (ins1, ins2, leftright)
State.ins_type = (leftright == LEFT_FIRST) ? INS_LEFT : INS_RIGHT; State.ins_type = (leftright == LEFT_FIRST) ? INS_LEFT : INS_RIGHT;
ins_type_counters[ (int)State.ins_type ]++; ins_type_counters[ (int)State.ins_type ]++;
(h->ops->func)(); (h->ops->func)();
/* If the PC has changed (ie, a jump), don't do the second instruction */
if (orig_pc == PC)
{
h = lookup_hash (ins2, 0); h = lookup_hash (ins2, 0);
get_operands (h->ops, ins2); get_operands (h->ops, ins2);
State.ins_type = (leftright == LEFT_FIRST) ? INS_RIGHT : INS_LEFT; State.ins_type = (leftright == LEFT_FIRST) ? INS_RIGHT : INS_LEFT;
ins_type_counters[ (int)State.ins_type ]++; ins_type_counters[ (int)State.ins_type ]++;
(h->ops->func)(); (h->ops->func)();
} }
}
static void static void
do_parallel (ins1, ins2) do_parallel (ins1, ins2)
uint16 ins1, ins2; uint16 ins1, ins2;