# Shared Flashcard Set

## Details

MIPS Assembly Instructions
MIPS instructions and their meanings (http://logos.cs.uic.edu/366/notes/MIPS%20Quick%20Tutorial.htm)
31
Computer Science
01/26/2009

Term
 lw register_destination, RAM_source
Definition
 #copy word (4 bytes) at source RAM location to destination register.
Term
 lb register_destination, RAM_source
Definition
 #copy byte at source RAM location to low-order byte of destination register,# and sign-e.g.tend to higher-order bytes
Term
 sw register_source, RAM_destination
Definition
 #store word in source register into RAM destination
Term
 sb register_source, RAM_destination
Definition
 #store byte (low-order) in source register into RAM destination
Term
 li register_destination, value
Definition
 #load immediate value into destination register
Term
 la \$t0, var1
Definition
 copy RAM address of var1 (presumably a label defined in the program) into register \$t0
Term
 lw \$t2, (\$t0)
Definition
Term
 sw \$t2, (\$t0)
Definition
 store word in register \$t2 into RAM at address contained in \$t0
Term
 lw \$t2, 4(\$t0)
Definition
 * load word at RAM address (\$t0+4) into register \$t2 * "4" gives offset from address in register \$t0
Term
 sw \$t2, -12(\$t0)
Definition
 * store word in register \$t2 into RAM at address (\$t0 - 12) * negative offsets are fine
Term
Definition
 # \$t0 = \$t1 + \$t2; add as signed (2's complement) integers
Term
 sub \$t2,\$t3,\$t4
Definition
 # \$t2 = \$t3 - \$t4
Term
Definition
 # \$t2 = \$t3 + 5; "add immediate" (no sub immediate)
Term
Definition
 # \$t1 = \$t6 + \$t7; add as unsigned integers
Term
 subu \$t1,\$t6,\$t7
Definition
 # \$t1 = \$t6 - \$t7; subtract as unsigned integers
Term
 mult \$t3,\$t4
Definition
 # multiply 32-bit quantities in \$t3 and \$t4, and store 64-bit # result in special registers Lo and Hi: (Hi,Lo) = \$t3 * \$t4
Term
 div \$t5,\$t6
Definition
 # Lo = \$t5 / \$t6 (integer quotient) # Hi = \$t5 mod \$t6 (remainder)
Term
 mfhi \$t0
Definition
 # move quantity in special register Hi to \$t0: \$t0 = Hi
Term
 mflo \$t1
Definition
 # move quantity in special register Lo to \$t1: \$t1 = Lo # used to get at result of product or quotient
Term
 move \$t2,\$t3
Definition
 # \$t2 = \$t3
Term
 b target
Definition
 # unconditional branch to program label target
Term
 beq \$t0,\$t1,target
Definition
 # branch to target if \$t0 = \$t1
Term
 blt \$t0,\$t1,target
Definition
 # branch to target if \$t0 < \$t1
Term
 ble \$t0,\$t1,target
Definition
 # branch to target if \$t0 <= \$t1
Term
 bgt \$t0,\$t1,target
Definition
 # branch to target if \$t0 > \$t1
Term
 bge \$t0,\$t1,target
Definition
 # branch to target if \$t0 >= \$t1
Term
 bne \$t0,\$t1,target
Definition
 # branch to target if \$t0 <> \$t1
Term
 j target
Definition
Term
 jr \$t3
Definition