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authorMichael Meissner <gnu@the-meissners.org>1997-05-08 19:58:20 +0000
committerMichael Meissner <gnu@the-meissners.org>1997-05-08 19:58:20 +0000
commit1e0e7911a5eb37ae2e5eecf14b393180ab0137aa (patch)
treecd3bd18cedf4845e5f45da56e3612431e892faa2
parent53dcd669e504fb892aaca0b3c7a99aea559aac7a (diff)
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reverse bit number for bbo/bbz instructions.
-rw-r--r--sim/tic80/ChangeLog1
-rw-r--r--sim/tic80/insns4
2 files changed, 3 insertions, 2 deletions
diff --git a/sim/tic80/ChangeLog b/sim/tic80/ChangeLog
index 4a458e4..33d6b1b 100644
--- a/sim/tic80/ChangeLog
+++ b/sim/tic80/ChangeLog
@@ -3,6 +3,7 @@ Thu May 8 11:57:47 1997 Michael Meissner <meissner@cygnus.com>
* insns (jsr,bsr): For non-allulled calls, set r31 so that the
return address does not reexecute the instruction in the delay
slot.
+ (bbo,bbz): Reverse bit number.
* misc.c (tic80_trace_*): Change format slightly to accomidate
real large decimal values.
diff --git a/sim/tic80/insns b/sim/tic80/insns
index 7c16213..6527833 100644
--- a/sim/tic80/insns
+++ b/sim/tic80/insns
@@ -107,7 +107,7 @@ void::function::do_and:signed32 *rDest, signed32 Source1, signed32 Source2
instruction_address::function::do_bbo:instruction_address nia, int bitnum, unsigned32 source, int annul, unsigned32 offset
int jump_p;
unsigned32 target = cia.ip + 4 * offset;
- if (MASKED32 (source, bitnum, bitnum))
+ if (MASKED32 (source, 32 - bitnum, 32 - bitnum))
{
if (annul)
nia.ip = -1;
@@ -131,7 +131,7 @@ instruction_address::function::do_bbo:instruction_address nia, int bitnum, unsig
instruction_address::function::do_bbz:instruction_address nia, int bitnum, unsigned32 source, int annul, unsigned32 offset
int jump_p;
unsigned32 target = cia.ip + 4 * offset;
- if (!MASKED32 (source, bitnum, bitnum))
+ if (!MASKED32 (source, 32 - bitnum, 32 - bitnum))
{
if (annul)
nia.ip = -1;