Question

RISC-V:

li x10, 0x84FF
slli x12, x10, 0x10
srai x13, x12, 0x10
srli x14, x12, 0x08
and x12, x13, x14
What should x12 contain?

Answer 1

x12 will contain 0x000F

Here's what each instruction does:

li x10, 0x84FF: This loads the immediate value 0x84FF into register x10.

slli x12, x10, 0x10: This shifts the value in register x10 left by 16 bits and stores the result in register x12.

srai x13, x12, 0x10: This shifts the value in register x12 right by 16 bits (arithmetically) and stores the result in register x13.

srli x14, x12, 0x08: This shifts the value in register x12 right by 8 bits (logically) and stores the result in register x14.

and x12, x13, x14: This performs a bitwise AND operation on the values in registers x13 and x14 and stores the result in register x12.

Therefore, x12 will contain 0x000F