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Assembly: Access and Store information in Memory
M[Addr]means a reference to the value stored in memory starting at address
The memory of address
Addrcould come from user space, CPU and MLU works together to get the physical page (PA) from Page Table, then access the PA in RAM.
The operand forms is basically the same.
lb D, S
sb S, D
sd ra,40(sp)Save 8 bytes (double) from
raregister to memory address of (sp + 40).