CSE4903
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Lab One: Introduction to PowerPC Instruction Set,
MPC875 and CodeWarrior
In this lab you will start exploring the PowerPC architecture, its registers and instruction set.
You will learn how to code and debug programs in Metrowerks Codewarrior, an integrated
software development environment for many embedded, handheld, and desktop platforms. You
will also get familiar with the laboratory report requirements.
1 Introductory PowerPC Exercises
In this exercise you will use PowerPC instructions to accomplish several basic tasks. Before you
start to write your own program, you may want to get familiar with the tools. A sample project
lab1.zip can be downloaded from the course website. Follow the instructions in the manual
to compile and run the sample code first. Then, you can add your own code into the sample code
to complete the following tasks.
1. Implement the bubble sort algorithm with C language to sort an array of unsigned
integers into descending order. The interface of the function will look like:
void my_bubblesort(unsigned int *p, int n);
The function will sort the n unsigned integer stored in p in descending order.
2. Define an array BUF of eight (8) unsigned integers. Implement a function with embedded
instructions to set the array to 0. For example, your code may look like:
void clear_array(unsigned int *p, int n) {
asm {
}
}
You can then call clear_array(BUF, 8) to set BUF to 0.
3. Implement a function and use embedded assembly code to deposit the following 32-bit
words into BUF. Do not assume these values are stored somewhere in the memory. (Hint:
each constant requires two instructions.)
0x01234567, 0x89ABCDEF, 0x55555555, 0xAAAAAAAA,
0xFEDCBA98, 0x76543210, 0xD409ACAB, 0X3C7A9BC0.
