Data Movement Instructions

Instruction		Operation
lw	R_d, addr	load integer (word)
sw	R_s, addr	store integer (word)
move	R_d, R_s	move integer
la	R_d, label	load address
li	R_d, const	load immediate

Data movement instructions move data from one place, called the source operand, to another place, called the destination operand. Data movement instructions can be grouped into loads, stores, moves, and immediate loads.

Load instructions move data from memory to registers.
Store instructions move data from registers to memory.
Move instructions move data from one register to another.
Immediate load instructions move constants, including addresses, to registers.

Load Instructions

Load instructions move data from memory to registers.

Instruction		Operation
lb	R_d, addr	load byte sign extended
lbu	R_d, addr	load byte zero extended
lh	R_d, addr	load halfword sign extended
lhu	R_d, addr	load halfword zero extended
lw	R_d, addr	load word
l.d	F_d, addr	load double
l.s	F_d, addr	load float

Store Instructions

Store instructions move data from registers to memory.

Instruction		Operation
sb	R_s, addr	store byte
sh	R_s, addr	store halfword
sw	R_s, addr	store word
s.d	F_s, addr	store double
s.s	F_s, addr	store float

Move Instructions

Move instructions move data from one register to another.

Instruction		Operation
mfc0	R_d, C_s	load from control register
mfc1	R_d, F_s	load from floating point register
move	R_d, R_s	move integer data
move.d	F_d, F_s	move double
move.s	F_d, F_s	move float
mtc0	R_s, C_d	store to control register
mtc1	R_s, F_d	store to floating point register

Immediate Load Instructions

Immediate load instructions move constants to registers.

Instruction		Operation
la	R_d, label	load address
li	R_d, const	load immediate
li.d	F_d, const	load double immediate
li.s	F_d, const	load float immediate