What does the notation R2 ← R1 signify in Register Transfer Language (RTL)?

Subject: Computer Architecture and Organization

Topic: Register Transfer & Microoperations

Options:

1. Option A: The contents of register R2 are copied into register R1
2. Option B: The contents of register R1 are copied into register R2
3. Option C: Registers R1 and R2 swap their stored contents
4. Option D: Register R1 is incremented by the value of R2

Correct Answer:

Option B: The contents of register R1 are copied into register R2

Explanation:

In Register Transfer Language, R2 ← R1 indicates a transfer of information from source register R1 to destination register R2. The contents of R1 remain unchanged.