la Rdest, addressAddress 
Load computed address, not the contents of the location, into
register Rdest.
lb Rdest, addressByte
lbu Rdest, addressUnsigned Byte
Load the byte at address into register Rdest (and
sign-extend it).
ld Rdest, addressDouble-Word
Load the 64-bit quantity at address into registers Rdest
and Rdest + 1.
lh Rdest, addressHalfword
lhu Rdest, addressUnsigned Halfword
Load the 16-bit quantity (halfword) at address into register
Rdest (and sign-extend it).
lw Rdest, addressWord
Load the 32-bit quantity (word) at address into register
Rdest.
lwcz Rdest, addressWord Coprocessor
Load the word at address into register Rdest of
coprocessor z (0-3).
lwl Rdest, addressWord Left
lwr Rdest, addressWord Right
Load the left (right) bytes from the word at the possibly-unaligned
address into register Rdest.
sb Rsource, addressByte
Store the low byte from register Rsource at address.
sd Rsource, addressDouble-Word
Store the 64-bit quantity in registers Rsource and Rsource
+ 1 at address.
sh Rsource, addressHalfword
Store the low halfword from register Rsource at address.
sw Rsource, addressWord
Store the word from register Rsource at address.
swcz Rsource, addressWord Coprocessor
Store the word from register Rsource of coprocessor z at
address.
swl Rsource, addressWord Left
swr Rsource, addressWord Right
Store the left (right) bytes from register Rsource at the
possibly-unaligned address.
ulh Rdest, addressLoad Halfword
ulhu Rdest, addressLoad Halfword Unsigned
Load the 16-bit quantity (halfword) at the possibly-unaligned
address into register Rdest (and sign-extend it).
ulw Rdest, addressLoad Word
Load the 32-bit quantity (word) at the possibly-unaligned
address into register Rdest.
ush Rsource, addressStore Halfword
Store the low halfword from register Rsource at the
possibly-unaligned address.
usw Rsource, addressStore Word
Store the word from register Rsource at the possibly-unaligned
address.