codesourcery arm

, the power that needs to be multiplied or divided by 2 can be done by moving left or right n bits. In fact, multiplication can be replaced by any integer by shift and addition. The method of adding and shifting in ARM 7 can be completed by one command, and the execution time is less than the multiplication command. For example, I = I × 5 can be replaced by I = (I Multiplication is used to replace multiplication: A 32 × 8 Multiplier is built in the

Transferred from CNBETA, original address: http://www.cnbeta.com/articles/167883.htmarmand x86are not comparable. The performance gap may be several thousand times higher. Here we will not care about the details. Let's just talk about why ARM and X86 are not comparable. To clarify this question, first of all, we need to understand what architecture is. Many people have mentioned that the architecture is different, but what does the architecture mean?

Part 1 arm assembly syntax in Linux Although it is convenient to use C or C ++ to write programs in Linux, the assembler source program is used for the most basic initialization of the system, such as initializing the stack pointer, setting the page table, and operating the arm coprocessor. After initialization, you can jump to C code execution. Note that the GNU assembler follows att's Assembly syntax and

Document directory PHP version 4.4.8 PHP and sqlite3 After several days of efforts, we finally built the Apache + SQLite + PHP platform on the arm-Linux platform. Apche and SQLite have a lot of information on the Internet, but PHP for ARM-Linux is rare. it took a lot of time to install PHP on the ARM platform. so I will post the building process here, hopin

Article Title: create a cross-compiling environment for arm-linux. Linux is a technology channel of the IT lab in China. Includes basic categories such as desktop applications, Linux system management, kernel research, embedded systems, and open source. Cross-compilation environment Cross-compilation is an important technology in the embedded development process. Its main feature is that the program code executed on a machine is not compiled and gener

Reprint Please specify source: http://blog.csdn.net/mybelief321/article/details/9076583Installation EnvironmentLinux version: Ubuntu 12.04 kernel version: Linux 3.5.0 cross compiler version: arm-linux-gcc-4.4.3 This version of the cross-compiler I have uploaded to the resources, can download freely, click here to downloadPre-Installation rambleFirst, a simple introduction, the so-called cross-compilation environment, that is, the installation, configu

This article reprinted from: Ubuntu 12.04 Embedded Cross-compilation environment ARM-LINUX-GCC construction process diagramPre-Installation rambleFirst, a simple introduction, the so-called cross-compilation environment, that is, the installation, configuration cross-compilation tool chain. In this environment, the embedded Linux system needs to compile the operating system, applications, etc., and then uploaded to the target machine.The cross-compila

Learning In Arm assembly language , it is necessary to debug Arm assembly instructions. As a debugger that supports multiple languages,gdb is naturally a better choice. When the debugger works, it usually constructs the trap soft interrupt instruction by modifying the content of the code snippet , realizes the program's pause and the program execution state monitoring. In order to execute

The first part is the arm assembly syntax in Linux. Although it is very convenient to use C or C ++ to write programs in Linux, the Assembly source program is used for the most basic initialization of the system, such as initializing the stack pointer, setting the page table, and operating the arm coprocessor. After initialization, you can jump to C code execution. Note that the GNU assembler follows att's