1. we discussed three different locations where the operands of an instruction m

Question

1. we discussed three different locations where the operands of an instruction may be found. What are the three locations?

2. In MIPS assembler, if a function returns an integer value, which register should the return value be placed in?

3. Which register is dedicated to the assembler so it may use this register when implementing pseudoinstructions?

4. In a MIPS32 system, suppose a 4-byte signed integer variable named x is allocated in memory at 0x1001_4822? Would there be any issues with this scenario?

5. In a MIPS32 system, suppose a 4-byte signed integer variable named x with value 0xAABBCCDD is allocated in memory at 0x1001_0000? The system is big-endian. Draw a memory diagram showing the four bytes of x stored in memory and clearly label the addresses of each byte of x.

Explanation / Answer

1) Three different locations where the operands of an instruction may be found : in memory, in a register, or as apart of the instruction

2) $v Registers are used for returning values from functions.

3)$at Register

4)NO

5)

0XAABBCCDD is hexadecimal. Since each hex digit is 4 bits, we need 8 hex digits to represent the 32 bit value.

So, the 4 bytes are: AA, BB, CC, DD where each byte requires 2 hex digits.

10 01 00 00

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