NIOS V/g version 1.0 vs 2.0 Atomic instruction

Using NIOS/g 1.0 the following code works: 00001604: lw a5,-20(s0) 00001608: lw a4,-24(s0) 0000160c: fence iorw,ow 00001610: amoswap.w.aq zero,a4,(a5) Using NIOS/g 2.0 an exception occurs when ...