RB - EC

Warning: The information on this page may be outdated. Students of this course should not use its contents as a reference and must consult el Racó instead.

MARS (MIPS Assembler and Runtime Simulator)

Installation

Download and save this Mars.jar version.
Download and save this startup.s version.
Install a Java Runtime Environment (JRE) version 1.6 or above.

Initial setting (only once)

Settings tab (top left) → Exception handler ... (2^nd from bottom):
1. Browse → Select the startup.s file.
2. Select the chechbox ✓ Include this exception handler file in all assemble operations.

Usage

Open a terminal (Linux: Ctrl+Alt+T, Microsoft Windows: Win+X → WinX).
Go to Mars.jar directory (e.g. cd <DIR_FULL_PATH>).
Run: java -jar Mars.jar.

Script

  #!/bin/bash
  
  cd ~/UPC/EC/mars
  java -jar Mars.jar

F1 help

Instructions + MACROS + Directives

C programming

Complier: The GNU Compiler Collection (GCC), a free software compiler system capable of compiling several programming languages, including C and C++. Basic usage:gcc -o BINARY_FILE_NAME C_FILE_NAME.c.
C code check: GCC accepts a large number of options. Some of them are predefined selections of other options. The most relevant selections to detect code inaccuracies (like use types consistingly, etc.) are -Wall, -Wextra and -Wpedantic, by order of severity, although not entirely inclusive.
Creation and management of binary programs and object files and assembly source code: GNU Binary Utilities (a.k.a. binutils).
Resources:
- Reference manuals:
- Begginer:
  - Wikibooks: A Little C Primer.
  - Harris & Harris: C Programming.
- Intermediate:
- Advanced: Wikibooks: C Programming.
- Pointers: Notes on Data Structures and Programming Techniques (CPSC 223, Spring 2022), 4.9 Pointers. Local copy 2024/10/15.

GNU bc

GNU bc an arbitrary precision numeric processing language. It can be used as base converter and for algebraic integer operation.

Special variables: obase = <OUTPUT_BASE_in_current_ibase>, ibase = <INPUT_BASE_in_current_ibase> (in most cases you want to set obase before ibase), and scale = <NUMBER> (set scale to zero for integer / and %).
Ivokation options: -l preloads a math library and sets scale to 20.

Computer Organisation (Estructura de computadors, EC)

Slides