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Interpreting Signed and Unsigned Numbers in Comparison Operations Quiz

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Interpreting Signed and Unsigned Numbers in Comparison Operations Quiz

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Questions and Answers

What is the result of $90000075 - 50000075$ when represented in hexadecimal form?

$AFFFFF8B$

$80000000$

$5FFFFFFF$

$40000000$ (correct)

If the programmer wants to test if [r1] is greater than [r2] considering the operands as unsigned numbers, which branching instruction should be used?

BLT (Branch if less than)

BGT (Branch if greater than)

BHI (Branch if higher) (correct)

BEQ (Branch if equal)

What condition needs to be satisfied for the BHI branching instruction to take the branch?

V = 1

N != V

C (correct)

Which test instruction explicitly updates CPSR on Rn AND Operand2?

TST Signup and view all the answers

What does the comparison N != V represent when considering signed numbers?

[r1] is greater than [r2] Signup and view all the answers

What is the purpose of the 'TST' instruction in ARM assembly language?

Test if an ASCII character in r0 is lower-case Signup and view all the answers

When executing CMP r1, r2, what does the computer perform?

[r1] - [r2] Signup and view all the answers

How is the 'TEQ' instruction different from the 'CMP' instruction in ARM assembly language?

TEQ updates CPSR based on logical XOR, while CMP updates based on subtraction. Signup and view all the answers

What does the CMP instruction do in assembly language?

Compares the contents of two registers and updates the CPSR flags Signup and view all the answers

In which stage of the ARM7 pipeline does the 'decode' phase occur?

Stage 2: Decode Signup and view all the answers

In the context of machine code conversion, what does the NE condition stand for?

Not Equal Signup and view all the answers

What does the hexadecimal representation '0x2_0010000' represent in ARM assembly language?

An instruction to update CPSR based on a logical operation Signup and view all the answers

How is error handling typically managed in assembly language programming?

By testing flag bits in the processor's CPSR Signup and view all the answers

What is the purpose of the MVN instruction in ARM assembly language?

Negate and set the status flags based on logical NOT operation Signup and view all the answers

Which instruction is used to invert all bits in a register in assembly language?

MVN Signup and view all the answers

When does a branch instruction 'BNE' get executed in ARM assembly language?

If Z-bit is 0 (result of a previous operation is zero) Signup and view all the answers

When interpreting hexadecimal numbers, what does it mean when [r1] > [r2] if considered as unsigned numbers?

[r1] is numerically greater than [r2] Signup and view all the answers

What is the purpose of a conditional branch instruction in assembly language?

To execute a section of code only if certain conditions are met Signup and view all the answers