Module 6 - Assembly Programming Flashcards
An add $t0, $t1, $zero instruction can be used to:
Copy data from main memory to a register.
Copy data from a register to main memory
Copy data from main memory to another location in main memory.
Copy data from a register to another register.
Copy data from a register to another register.
Which of the following instructions can be used to copy data from a register to main memory? lw $t0, 4($s1) sw $t0, 4($s1) add $t0, $t1, $zero sll $s0, $t1, 4
sw $t0, 4($s1)
What is the smallest unit of memory data that is addressable (has an address) in MIPS architecture? double-word byte word bit
byte
The MIPS architecture uses a general-purpose register file with how many entries? 32 64 16 Up to 4GB 8 4
32
The MIPS architecture uses a general-purpose register file and each entry stores how many bits? Up to 4GB 32 64 4 16 8
32
In the field below, enter the integer value of the $v0 register after executing the following instruction, given the register values $zero = 0, $t7 = 109 :
sll $v0, $t7, 9
55808
In the field below, enter the integer value of the $v0 register after executing the following instruction, given the register values $zero = 0 :
andi $v0, $zero, 5428
0
In the field below, enter the integer value of the $v0 register after executing the following instruction, given the register values $t0 = 31, $t7 = 93 :
xor $v0, $t0, $t7
66
Which of the following keywords is the MIPS instruction for “add signed”? add and addi addu
add
In the field below, enter the integer value of the $v0 register after executing the following instruction, given the register values $s4 = 44 :
andi $v0, $s4, 17100
12
Select the correct MIPS assembly implementation of the following C code decision (given i,j,k stored in $s0, $s1 and $s2 respectively:
if (i!=j)
k = i+j;
j = j-i
beq $s0, $s1, Lab1
add $s2, $s0, $s1
Lab1: sub $s1, $s1, $s0
bne $s0, $s1, Else add $s2, $s0, $s1 j Next Else: sub $s2, $s2, $s0 Next: addi $s2, $s2, 1
beq $s0, $s1, Else add $s2, $s0, $s1 j Next Else: sub $s2, $s2, $s0 Next: addi $s2, $s2, 1
bne $s0, $s1, Lab1
add $s2, $s0, $s1
Lab1: sub $s1, $s0, $s1
beq $s0, $s1, Lab1
add $s2, $s0, $s1
Lab1: sub $s1, $s1, $s0
Select the correct MIPS assembly implementation of the following C code decision (given i,j,k stored in $s0, $s1 and $s2 respectively:
if (i!=j) k = i+j; else j = j-i; i = i+1;
bne $s0, $s1, Else add $s2, $s0, $s1 j Next Else: sub $s1, $s1, $s0 Next: addi $s0, $s0, 1
beq $s0, $s1, Lab1
add $s2, $s0, $s1
Lab1: sub $s1, $s0, $s1
beq $s0, $s1, Else add $s2, $s0, $s1 j Next Else: sub $s1, $s1, $s0 Next: addi $s0, $s0, 1
bne $s0, $s1, Lab1
add $s2, $s0, $s1
Lab1: sub $s1, $s0, $s1
beq $s0, $s1, Else add $s2, $s0, $s1 j Next Else: sub $s1, $s1, $s0 Next: addi $s0, $s0, 1
Which of the following instructions should be used to implement an "if (a!=b)" decision in assembly? bgtz j beq bne blez
beq
Which of the following instructions should is used to implement a decision in assembly that has an else component? j beq bgtz bne blez
j
Select the correct MIPS assembly implementation of the following C code decision (given i,j,k stored in $s0, $s1 and $s2 respectively:
if (i==j)
k = i+j;
j = j-i
bne $s0, $s1, Else add $s2, $s0, $s1 j Next Else: sub $s2, $s2, $s0 Next: addi $s2, $s2, 1
bne $s0, $s1, Lab1
add $s2, $s0, $s1
Lab1: sub $s1, $s0, $s1
beq $s0, $s1, Lab1
add $s2, $s0, $s1
Lab1: sub $s1, $s0, $s1
beq $s0, $s1, Else add $s2, $s0, $s1 j Next Else: sub $s2, $s2, $s0 Next: addi $s2, $s2, 1
bne $s0, $s1, Lab1
add $s2, $s0, $s1
Lab1: sub $s1, $s0, $s1
Given variables i and j stored in $s0 and $s1 respectively, which of the following assembly blocks implements if(i > j) ?
slt $t0, $s1, $s0
ori $at, $zero, 1
subu $t0, $at, $t0
bne $t0, $zero, Next
slt $t0, $s0, $s1
bne $t0, $zero, Next
slt $t0, $s0, $s1
ori $at, $zero, 1
subu $t0, $at, $t0
bne $t0, $zero, Next
slt $t0, $s1, $s0
bne $t0, $zero, Next
slt $t0, $s1, $s0
ori $at, $zero, 1
subu $t0, $at, $t0
bne $t0, $zero, Next
Given variables i and j stored in $s0 and $s1 respectively, select the decision that matches the following assembly code:
slt $t0, $s1, $s0
ori $at, $zero, 1
subu $t0, $at, $t0
bne $t0, $zero, Next
if (i < j )
if ( i > j )
if (i <= j )
if ( i >= j )
if ( i > j )
Given variables i and j stored in $s0 and $s1 respectively, which of the following assembly blocks implements if(i >= j) ?
slt $t0, $s0, $s1
bne $t0, $zero, Next
slt $t0, $s1, $s0
ori $at, $zero, 1
subu $t0, $at, $t0
bne $t0, $zero, Next
slt $t0, $s0, $s1
ori $at, $zero, 1
subu $t0, $at, $t0
bne $t0, $zero, Next
slt $t0, $s1, $s0
bne $t0, $zero, Next
slt $t0, $s0, $s1
bne $t0, $zero, Next
Given variables i and j stored in $s0 and $s1 respectively, which of the following assembly blocks implements if(i < j) ?
slt $t0, $s0, $s1
bne $t0, $zero, Next
slt $t0, $s1, $s0
bne $t0, $zero, Next
slt $t0, $s1, $s0
ori $at, $zero, 1
subu $t0, $at, $t0
bne $t0, $zero, Next
slt $t0, $s0, $s1
ori $at, $zero, 1
subu $t0, $at, $t0
bne $t0, $zero, Next
slt $t0, $s0, $s1
ori $at, $zero, 1
subu $t0, $at, $t0
bne $t0, $zero, Next
Given variables i and j stored in $s0 and $s1 respectively, select the decision that matches the following assembly code:
slt $t0, $s0, $s1
ori $at, $zero, 1
subu $t0, $at, $t0
bne $t0, $zero, Next
if (i < j )
if ( i > j )
if (i <= j )
if ( i >= j )
if (i < j )
Select the primary difference between the implementation of a while statement, and the implementation of an for statement in assembly:
The jump points to a label further down in the program.
The jump points to a label at or before the branch.
An incrementing or decrementing statement is placed before the jump, to update the sentinel variable.
No difference.
An incrementing or decrementing statement is placed before the jump, to update the sentinel variable.
Select the primary difference between the implementation of a while statement, and the implementation of an if-else statement in assembly:
An incrementing or decrementing statement is placed before the jump, to update the sentinel variable.
The jump points to a label further down in the program.
No difference.
The jump points to a label at or before the branch
The jump points to a label at or before the branch
