コンピューター・アーキテクチャ
Computer Architecture

Outline of This Lecture

• Using the MIPS Simulator
• Homework
• n.b.: Lecture 7, two weeks from now, will be rescheduled!

Note: on MacOS, you will need spim 7.2 (or possibly later), available on the web. (Actually, it might not be a bad idea for everyone to use the latest, although I installed 7.0 from the CD in the book.)

You will need vecadd.s, a short MIPS assembly program.

Here are screen shots from spim (Linux), xspim (Linux), PCspim (Windows) and spim (Mac) versions of the tool.

Things to note in the images above, as well as your own execution runs:

• Watch the advance of the PC (program counter) as you step through the program.
• By convention, most of the registers have two names, Rxx and a more mnemonic one indicating the use.
• The floating point registers are either single-precision, or a pair of them (e.g., F0 and F1) are used as one double-precision FP register.
• Notice especially the precision and accuracy of the FP numbers in the output, compared to the values we intended! This is an important fact!

1. Modify vecadd.s to multiply two four-by-four matrices and print the results (行列の掛け算). Call it arraymult.s. vecadd.sを改変して、4次の正方行列をかけ算するプログラムarraymult.sを 作りなさい. Include a printout of the output. Use these arrays:
   array1: .float 3.14159265, 2.71828183, 1.0, -0.10 1.0, 0.0, 1.0, 0.0 0.0, 1.0, 0.0, 1.0 -1.0, 1.0, -1.0, 1.0
   array2: .float 2.71828183, 1.0, 3.14159265, 1.0 1.0, 0.0, 1.0, 0.0 -1.0, 1.0, -1.0, 1.0 3.0, 2.0, 1.0, 0.0

Next Lecture

Next lecture:

第6回 11月3日 プロセッサー：パイプラインの基本
Lecture 6, November 3: Processors: Basics of Pipelining

Readings for next time:

• P-H:
• H-P: Appendix A.1 and A.2

Additional Information

• Class top page
• Elsevier's web page for the textbook.
• My web page on system software.

その他

• Rodney Van Meterのホームページ
• 徳田・村井・楠本・中村・高汐・重近・湧川・バンミーター研究プロジェクト