diff --git a/sim/bfin/ChangeLog b/sim/bfin/ChangeLog
index 900dc50cb5..0e37dddc14 100644
--- a/sim/bfin/ChangeLog
+++ b/sim/bfin/ChangeLog
@@ -1,3 +1,8 @@
+2011-03-23  Robin Getz  <robin.getz@analog.com>
+
+	* bfin-sim.c (decode_dsp32alu_0): Set A1 to a1_lo when up_hi is false,
+	and set A0 to a0_lo when up_lo is false.
+
 2011-03-23  Robin Getz  <robin.getz@analog.com>
 
 	* bfin-sim.c (decode_dsp32alu_0): Call saturate_s40_astat instead of
diff --git a/sim/bfin/bfin-sim.c b/sim/bfin/bfin-sim.c
index c78fe1a5a5..85e281a9d1 100644
--- a/sim/bfin/bfin-sim.c
+++ b/sim/bfin/bfin-sim.c
@@ -5041,11 +5041,16 @@ decode_dsp32alu_0 (SIM_CPU *cpu, bu16 iw0, bu16 iw1)
 	  SET_AREG (1, src_hi);
 	  SET_DREG (dst1, PREG (0));
 	}
+      else
+	SET_AREG (1, a1_lo);
+
       if (up_lo)
 	{
 	  SET_AREG (0, src_lo);
 	  SET_DREG (dst0, PREG (0));
 	}
+      else
+	SET_AREG (0, a0_lo);
     }
   else
     illegal_instruction (cpu);