Bitwise logical and shift operations, Assembly Language

Part A: Bitwise Logical and Shift Operations

Create a SPARC assembly language program that extracts a bit-field from the contents of register %l0. The position of the rightmost bit of the field is indicated in register %l1, and the number of bits in the field is indicated in register %l2. The extracted field should be put into register %l3, right-shifted so that field starts at bit 0; any bits outside of the extracted field should be set to 0. Structure your program so that it operates on 3 separate inputs, each with different input data, field positions, and field widths. Your TA will provide the inputs to work with. Do not hard code any bit masks; your program should create them using the appropriate bitwise operations. Optimize your program, eliminating nop instructions where possible. Do not use m4.

Use printf() to display in hexadecimal the contents of registers %l0, %l1, %l2 before each extraction, and %l3 afterwards. Also run your program in gdb, displaying the contents of registers %l0, %l1, %l2 before each extraction, and %l3 afterwards. Capture the gdb session using script. On a separate piece of paper, show the bit pattern for each hexadecimal number for the registers %l0 and %l3, circling the extracted field.

Part B: Integer Multiplication using Add and Shift Operations

Write a SPARC assembly language program that implements the following integer multiplication algorithm:

negative = multiplier >= 0 ? 0 : 1;

product = 0;

for (i = 0; i < 32; i++) {

if (multiplier & 1)

product += multiplicand;

(product and multiplier registers combined as a unit) >> 1;

}

if (negative)

product -= multiplicand;

Structure your program so that it shows 3 different multiplications: the first should multiply two positive numbers together, the second should multiply a positive number by a negative number, and the third should multiply two negative numbers together. Your TA will provide the input data to work with. Since we don't yet know how to create subroutines, you can simply cut and paste the multiplication code to do each multiplication.

Use printf() to display in hexadecimal the contents of the product, multiplier and multiplicand registers before and after each multiplication. Optimize your program, eliminating nop instructions where possible. Do not use m4. Also run the program in gdb, displaying the contents of key registers as the program executes; you should show that the algorithm is working as expected. Capture the gdb session using script. On a separate piece of paper, show the bit pattern (binary number) for each hexadecimal number, and its decimal equivalent (in other words, show the binary and decimal values of the multiplier, multiplicand, and product).

Other Requirements

Make sure your code is properly formatted into columns, is readable and fully documented, and includes identifying information at the top of each file. You must comment each line of assembly code. Your code should also be well designed: make sure it is well organized, clear, and concise. Your TA will specify the inputs to use for the above two programs.

New Skills Needed for this Assignment:

Use of bitwise logical and shift operations
Use of branching and condition code tests
Understanding of hexadecimal and binary numbers

Posted Date: 3/29/2013 2:49:39 AM | Location : United States







Related Discussions:- Bitwise logical and shift operations, Assignment Help, Ask Question on Bitwise logical and shift operations, Get Answer, Expert's Help, Bitwise logical and shift operations Discussions

Write discussion on Bitwise logical and shift operations
Your posts are moderated
Related Questions
Write Policy A write policy determines how the cache deals with a write cycle. The 2 common write policies areWrite-Throughand Write-Back. In Write-Back policy, the cache behav

Basic Microprocessor Architecture and Interface : Introduction: Intel launches its first 4-bit microprocessor 4004 in the year 1971 and 8-bit microprocessor 8008 in the y

NASM assembly language program: Consider a sequence of 19 strictly positive decimal digits, most likely stored in an array. There are obviously duplicates, and the sequence is un

Print Media Advertising (PMA) has been providing a contract to market Buzz Cola via newspaper ads in a main southern newspaper. Full-page ads in the weekday editions (Monday throug

INT N : Interrupt Type N:- In the interrupt structure of 8086/8088, 256 interrupts are distinct equivalent to the types from OOH to FFH. When an instruction INT N is executed,

GROUP : Group the Related Segments:- The directive which is used to form logical groups of segments with same purpose or type. This isused to inform the assembler to form a log

You have to write a subroutine (assembly language code using NASM) for the following equation.


I have two homework assignments due in 10 hours for the x86 processor assembly language

Example : Add the contents of the 2000H: 0500H memory location to contents of 3000H: 0600H and store the result in 5000H: 0700H. Solution : Unlike the past example progra