MCU newbie asks for help regarding data transfer instructions

畫比丶

MCU newbie asks for help regarding data transfer instructions [Copy link]

Why is movx a,@ri followed by ((ri))→a and movx @ri,a followed by (a)→(ri)? (I really don’t know much

freebsder

->You can think of it as the data transfer direction. ((ri))->a means putting the indirect address into a. The data transfer direction of the assembly format of an instruction system is the same. Either it flows from the second place to the left to the first place, which is usually the case with GNU assembly, or vice versa, which is usually the case with Intel assembly.

kiverin

MOVX cannot use indirect addressing as the target address, so @Ri can only be the source address

njzr

kiverin posted on 2021-8-2 14:17 MOVX cannot use indirect addressing as the target address, so @Ri can only be the source address

sure