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Diffstat (limited to 'src/devices/cpu/mb86235/mb86235fe.cpp')
-rw-r--r--src/devices/cpu/mb86235/mb86235fe.cpp2
1 files changed, 1 insertions, 1 deletions
diff --git a/src/devices/cpu/mb86235/mb86235fe.cpp b/src/devices/cpu/mb86235/mb86235fe.cpp
index 94a8d986869..26aa0e3adf4 100644
--- a/src/devices/cpu/mb86235/mb86235fe.cpp
+++ b/src/devices/cpu/mb86235/mb86235fe.cpp
@@ -804,7 +804,7 @@ void mb86235_frontend::describe_control(opcode_desc &desc)
int ef1 = (desc.opptr.q[0] >> 16) & 0x3f;
int ef2 = desc.opptr.q[0] & 0xffff;
int cop = (desc.opptr.q[0] >> 22) & 0x1f;
- int rel12 = (desc.opptr.q[0] & 0x800) ? (0xfffff000 | (desc.opptr.q[0] & 0xfff)) : (desc.opptr.q[0] & 0xfff);
+ int rel12 = util::sext<int>(desc.opptr.q[0], 12);
switch (cop)
{