问一下c6000中ADDAB/ADDAH/ADDAW指令问题,谢谢
addab .d1 a4,a2,a4
执行前:a2=0000000bh,a4=00000100h,amr=00020001h
执行后:a2=0000000bh,a4=00000103h,amr=00020001h
addah .d1 a4,a2,a4
执行前:a2=0000000bh,a4=00000100h,amr=00000000h
执行后:a2=0000000bh,a4=00000106h,amr=00000000h
为什么呀,小弟有点不明白?,特此请教!谢谢!