Question

Say that:

• Memory at 0x10000000 contains 0x80
• Memory at 0x10000001 contains 0x00
• Register $s0 contains 0x10000000

Suppose that the MIPS machine runs the following instruction:

lh $t0,0($s0)

1. What is the hexdecimal value in register $t0 afterwards if machine is little endian? 0x ______
2. What is the hexdecimal value in register $t0 afterwards if machine is big endian? 0x ______

Please note MIPS register has 32bit, which means you need to fill in 8 hexadecimal digits in the blank because each hexidecimal digit is equivalent to 4 bits.

PLEASE do some explainations!!

Answer 1

Consider the following MIPS instruction:

lh $t0,0($s0) ; LH - Loading Halfword. Load the 32 - bit sign-extended halfword into $t0 register.

Suppose that memory address 0x10000000 = 0x80

memory address 0x10000001 = 0x00

Register $s0 = 0x10000000

(i) If the MIPS machine is little endian, what will be the 8-digit hexadecimal value in $t0 register:

Answer: $t0 = 0x80000000

(i) If the MIPS machine is Big endian, what will be the 8-digit hexadecimal value in $t0 register:

Answer: $t0 = 0x00000080