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authorMichael Meissner <gnu@the-meissners.org>1996-09-15 03:46:52 +0000
committerMichael Meissner <gnu@the-meissners.org>1996-09-15 03:46:52 +0000
commit215ac9533cc93f7de6c769c7da8fe8781a175b37 (patch)
tree4a016166eee034bc62618bfd4259c32b2dff2ac9 /sim/d10v
parentad0d14e7a21a002e88d23c7b7aa417ad27fe534e (diff)
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Fix brf0{t,f}.s <label> -> instruction not to execute instruction if branch succeeds
Diffstat (limited to 'sim/d10v')
-rw-r--r--sim/d10v/ChangeLog5
-rw-r--r--sim/d10v/interp.c19
2 files changed, 19 insertions, 5 deletions
diff --git a/sim/d10v/ChangeLog b/sim/d10v/ChangeLog
index bd1e1ad..3f22811 100644
--- a/sim/d10v/ChangeLog
+++ b/sim/d10v/ChangeLog
@@ -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>
* simops.c (OP_5F00): Use unknown traps to print all GPRs,
diff --git a/sim/d10v/interp.c b/sim/d10v/interp.c
index 38b4d4c..f035cf0 100644
--- a/sim/d10v/interp.c
+++ b/sim/d10v/interp.c
@@ -158,12 +158,15 @@ do_long (ins)
ins_type_counters[ (int)State.ins_type ]++;
(h->ops->func)();
}
+
static void
do_2_short (ins1, ins2, leftright)
uint16 ins1, ins2;
enum _leftright leftright;
{
struct hash_entry *h;
+ reg_t orig_pc = PC;
+
#ifdef DEBUG
if ((d10v_debug & DEBUG_INSTRUCTION) != 0)
(*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;
ins_type_counters[ (int)State.ins_type ]++;
(h->ops->func)();
- h = lookup_hash (ins2, 0);
- get_operands (h->ops, ins2);
- State.ins_type = (leftright == LEFT_FIRST) ? INS_RIGHT : INS_LEFT;
- ins_type_counters[ (int)State.ins_type ]++;
- (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);
+ get_operands (h->ops, ins2);
+ State.ins_type = (leftright == LEFT_FIRST) ? INS_RIGHT : INS_LEFT;
+ ins_type_counters[ (int)State.ins_type ]++;
+ (h->ops->func)();
+ }
}
+
static void
do_parallel (ins1, ins2)
uint16 ins1, ins2;