Question

This is a homework assignment for Computer Architecture and some question use MIPS Assembly language.

1.     In the following MIPS assembly code, translate all the instructions to their corresponding machine code in hexadecimal format. This code is stored in the memory from address 0x1fff0000.
Loop: sw $t1, 4($s0)
       addi $t1, $t1, -1
   sll $t1, $t1, 2
       bne $t1, $s5, Exit
   addi $s0, $s0, 4
         j Loop
Exit: …

2.     Find the MIPS instruction with the machine code 0x02108020.

3.     Find the decimal value of the 2's complement number 0xffffffab.

4.     Compile the following C code into MIPS:

i=0;  

        while (i<=100) do

            A[4*i]=0;  

        where integer i is in register $s0 and the base memory address of array A is in$s1.

Answer 1

Low level computing construct is utilized to compose programs as far as the essential operations of a processor. This is an instructional exercise in the low level computing construct for the MIPS32 processor chip. This instructional exercise utilizes the SPIM test system of the chip as opposed to real equipment.

The design of a PC is a legitimate portrayal of its parts and its fundamental operations. In unadulterated low level computing construct one low level computing construct proclamation compares to one essential operation of the processor. At the point when a software engineer writes in low level computing construct the developer is requesting the fundamental operations of the processor. The design of the processor is obvious in each announcement of the program.

Immaculate low level computing construct is uncommon. Most application projects are composed in an abnormal state dialect. Notwithstanding when low level computing construct is utilized it for the most part has been upgraded. Elements are added to it to make it more software engineer well disposed. This broadened low level computing construct incorporates explanations that compare to a few essential machine operations. The MIPS augmented low level computing construct does this, however the processor chip is still obvious.

Programs in abnormal state dialects, for example, C or Pascal are (for the most part) free of the processor they keep running on. Programs in Java are absolutely free of the processor. In any case, in low level computing construct the program is composed absolutely as far as the processor. This section begins a voyage through low level computing construct.

Section Topics:

The Basic Computer Cycle

Machine Instructions

Machine Language

Low level computing construct

Dialect Translation

Imitating

Protest Modules and Load Modules

Isolate Assembly