程序代写代做代考 mips bad_MIPSReference.pdf
bad_MIPSReference.pdf
MIPS Reference Sheet
Branch Instructions
Instruction Operation
beq $s, $t, label if ($s == $t) pc += i << 2
bgtz $s, label if ($s > 0) pc += i << 2
blez $s, label if ($s <= 0) pc += i << 2
bne $s, $t, label if ($s != $t) pc += i << 2
Arithmetic and Logical Instructions
Jump Instructions
Instruction Operation
add $d, $s, $t $d = $s + $t
addu $d, $s, $t $d = $s + $t
addi $t, $s, i $t = $s + SE(i)
addiu $t, $s, i $t = $s + SE(i)
and $d, $s, $t $d = $s & $t
andi $t, $s, i $t = $s & ZE(i)
div $s, $t lo = $s / $t; hi = $s % $t
divu $s, $t lo = $s / $t; hi = $s % $t
mult $s, $t hi:lo = $s * $t
multu $s, $t hi:lo = $s * $t
nor $d, $s, $t $d = ~($s | $t)
or $d, $s, $t $d = $s | $t
ori $t, $s, i $t = $s | ZE(i)
sll $d, $t, a $d = $t << a
sllv $d, $t, $s $d = $t << $s
sra $d, $t, a $d = $t >> a
srav $d, $t, $s $d = $t >> $s
srl $d, $t, a $d = $t >>> a
srlv $d, $t, $s $d = $t >>> $s
sub $d, $s, $t $d = $s – $t
subu $d, $s, $t $d = $s – $t
xor $d, $s, $t $d = $s ^ $t
xori $d, $s, i $d = $s ^ ZE(i)
Instruction Operation
j label pc += i << 2
jal label $31 = pc; pc += i << 2
jalr $s $31 = pc; pc = $s
jr $s pc = $s
Load Instructions
Instruction Operation
lb $t, i($s) $t = SE (MEM [$s + i]:1)
lbu $t, i($s) $t = ZE (MEM [$s + i]:1)
lh $t, i($s) $t = SE (MEM [$s + i]:2)
lhu $t, i($s) $t = ZE (MEM [$s + i]:2)
lw $t, i($s) $t = MEM [$s + i]:4
Store Instructions
Instruction Operation
sb $t, i($s) MEM [$s + i]:1 = LB ($t)
sh $t, i($s) MEM [$s + i]:2 = LH ($t)
sw $t, i($s) MEM [$s + i]:4 = $t
Data Movement Instructions
Constant-Manipulating Instructions Instruction Operation
mfhi $d $d = hi
mflo $d $d = lo
mthi $s hi = $s
mtlo $s lo = $s
Instruction Operation
lhi $t, i HH($t) = i
llo $t, i LH($t) = i
Comparison Instructions
Exception and Interrupt InstructionsInstruction Operation
slt $d, $s, $t $d = ($s < $t)
sltu $d, $s, $t $d = ($s < $t)
slti $t, $s, i $t = ($s < SE(i))
sltiu $t, $s, i $t = ($s < SE(i))
Instruction Operation
trap 1 Print integer value in $4
trap 5 Read integer value into $2
trap 10 Terminate program execution
trap 101 Print ASCII character in $4
trap 102 Read ASCII character into $2
Note: Detailed encoding reference on reverse.
1
Instruction Encodings
Register 000000ss sssttttt dddddaaa aaffffff
Immediate ooooooss sssttttt iiiiiiii iiiiiiii
Jump ooooooii iiiiiiii iiiiiiii iiiiiiii
Instruction Syntax
Syntax Template Encoding Comments
ArithLog
DivMult
Shift
ShiftV
JumpR
MoveFrom
MoveTo
f $d, $s, $t
f $s, $t
f $d, $t, a
f $d, $t, $s
f $s
f $d
f $s
Register
Register
Register
Register
Register
Register
Register
ArithLogI
LoadI
Branch
BranchZ
LoadStore
o $t, $s, i
o $t, immed32
o $s, $t, label
o $s, label
o $t, i($s)
Immediate
Immediate
Immediate
Immediate
Immediate
i is high or low 16 bits of immed32
i is calculated as (label-(current+4))>>2
i is calculated as (label-(current+4))>>2
Jump
Trap
o label
o i
Jump
Jump
i is calculated as label<<2 Opcode Table Instruction Opcode/Function Syntax add 100000 ArithLog addu 100001 ArithLog addi 001000 ArithLogI addiu 001001 ArithLogI and 100100 ArithLog andi 001100 ArithLogI div 011010 DivMult divu 011011 DivMult mult 011000 DivMult multu 011001 DivMult nor 100111 ArithLog or 100101 ArithLog ori 001101 ArithLogI sll 000000 Shift sllv 000100 ShiftV sra 000011 Shift srav 000111 ShiftV srl 000010 Shift srlv 000110 ShiftV sub 100010 ArithLog subu 100011 ArithLog xor 100110 ArithLog xori 001110 ArithLogI lhi 011001 LoadI llo 011000 LoadI Instruction Opcode/Function Syntax slt 101010 ArithLog sltu 101001 ArithLog slti 001010 ArithLogI sltiu 001001 ArithLogI beq 000100 Branch bgtz 000111 BranchZ blez 000110 BranchZ bne 000101 Branch j 000010 Jump jal 000011 Jump jalr 001001 JumpR jr 001000 JumpR lb 100000 LoadStore lbu 100100 LoadStore lh 100001 LoadStore lhu 100101 LoadStore lw 100011 LoadStore sb 101000 LoadStore sh 101001 LoadStore sw 101011 LoadStore mfhi 010000 MoveFrom mflo 010010 MoveFrom mthi 010001 MoveTo mtlo 010011 MoveTo trap 011010 Trap Note: Operation details on reverse. 2
