23Sp_test2

5. (10 pt) Suppose we have two sets of MIPS codes shown below, which belong to the same program. MIPS codes on the left are being executed. What is the content of $t0 when the instruction at the label ‘cont’ is about to be executed. Write your answer in HEX. 6. (10 pt) The jump table in problem 5 above is located in the text segment. However, it can be constructed with target addresses alone in the data segment as shown on the right.Write MIPS instructions between ‘sll $s0, $s0, 2’ and ‘cont’ so that the program branches to the desired label among F0, F1, and F2 according to the index $s0 as in the code segment above. 7. (12 pt) An assembler generates a symbol table storing the symbol (max 8 characters), its value, and the status of the symbol for each line of instructions. The status has a flag if the symbol is defined (found in label field) or not. For the following snippet of the MIPS codes, show the symbol table after each line of instructions is assembled (starting at address 0x0400). WW: b F0 b F1 b F2 F0: add $t0, $t0, $t1 b cont F1: sub $t0, $t0, $t1 b cont F2: mul $t0, $t0, $t1 b cont li $t0, -2 li $t1, 4 la $s1, WW li $s0, 2 sll $s0, $s0, 2 add $s1, $s1, $s0 jr $s1 cont: .data WW: .word F0 .word F1 .word F2 .text F0: add $t0, $t0, $t1 b cont F1: sub $t0, $t0, $t1 b cont F2: mul $t0, $t0, $t1 b cont la $s1, WW li $s0, 2 sll $s0, $s0, 2 add $s1, ($s1) $0 lw $s1, ($s1)0 jr $s1 cont: