In LC-3.The four instruction sequence below performs the OR of the contents of register 1 and register 2 and puts the result in register 3. Fill in the two missing instructions so that the four instruction sequence will do the job.(1): 1001 100 001 111111 (2) : (3): 0101 110 100 000 101 (4) :
时间: 2023-06-19 16:06:12 浏览: 52
(2): 0101 000 010 000 001 (3): 1101 000 011 000001
Explanation:
(1) loads the contents of R1 into R3
(2) loads the contents of R2 into R0
(3) performs the OR operation between R1 and R0 and stores the result in R3
(4) is a HALT instruction to stop the program.
相关问题
Provide the type and hexadecimal representation of following instruction: sw $t1, 32($t2)
The given assembly language instruction `sw $t1, 32($t2)` is a MIPS instruction that stores the contents of register `$t1` to the memory location specified by the sum of the value in register `$t2` and the immediate offset `32`. This instruction is used to store data from a register to memory.
The type of this instruction is a memory access instruction, specifically a store word instruction.
In hexadecimal representation, this instruction would be:
```
0x25490020
```
This hexadecimal representation corresponds to the following binary representation:
```
0010 0101 0100 1001 0000 0000 0010 0000
```
Here, the first 6 bits (001001) represent the opcode for the store word instruction, the next 5 bits (01001) represent the destination register `$t1`, the next 5 bits (01001) represent the source register `$t2`, and the last 16 bits (0000001000000000) represent the 16-bit signed immediate offset value `32`.
Describe the execution of the JMP instruction if R3 contains x369C (refer to Example 4.5). (6 points)
Without information about the specific architecture and instruction set being used, it is difficult to provide a definitive answer. However, in general, the JMP instruction is typically used to change the flow of execution to a different memory location or address.
In Example 4.5, R3 contains the value x369C. Depending on the specific instruction set being used, this could represent a memory address that the JMP instruction would jump to. For example, if the instruction set uses a direct addressing mode, the JMP instruction might load the program counter with the value in R3, causing the processor to begin executing instructions at memory address x369C.
Alternatively, if the instruction set uses a relative addressing mode, the JMP instruction might add the value in R3 to the current program counter value to determine the new address to jump to. For example, if the current program counter is x2000 and R3 contains x369C, the JMP instruction might cause the program counter to be set to x569C.
Ultimately, the exact behavior of the JMP instruction will depend on the specific architecture and instruction set being used.