What is p-code compiler in system programming?

In computer programming, a p-code machine (portable code machine) is a virtual machine designed to execute p-code (the assembly language or machine code of a hypothetical central processing unit (CPU)). Two early compilers generating p-code were the Pascal-P compiler in 1973, by Kesav V.

What does code compilation mean?

Compiling is the transformation from Source Code (human readable) into machine code (computer executable). A compiler takes the recipe (code) for a new program (written in a high level language) and transforms this Code into a new language (Machine Language) that can be understood by the computer itself.

What is the meaning of Pcode?

p-codenoun. A very low-level code that is machine independent and enables a compiled file to be run on different processor types. Most implementations of the Pascal programming language employed a p-code system to achieve a greater level of machine independence.

What is the purpose of a compiler?

compiler, computer software that translates (compiles) source code written in a high-level language (e.g., C++) into a set of machine-language instructions that can be understood by a digital computer’s CPU. Compilers are very large programs, with error-checking and other abilities.

What is cross compiler with example?

A cross compiler is a compiler capable of creating executable code for a platform other than the one on which the compiler is running. For example, a compiler that runs on a PC but generates code that runs on Android smartphone is a cross compiler.

What happens when you compile code?

A compiler takes the program code (source code) and converts the source code to a machine language module (called an object file). Another specialized program, called a linker, combines this object file with other previously compiled object files (in particular run-time modules) to create an executable file.

What is difference between compiler and interpreter?

Interpreter translates just one statement of the program at a time into machine code. Compiler scans the entire program and translates the whole of it into machine code at once. An interpreter takes very less time to analyze the source code. An interpreter does not generate an intermediary code.

What is Pcode in landline?

PCODE is the Exit codes, it have two situations: 1 – Exit codes (also known as international access codes or IDD International Direct Dialing codes) are used for dialing out of your country. For example if you want to call from Anguilla to Afghanistan you must dial: 011 + 93 + phone number.

What is the difference between cross compiler and a compiler?

The main difference between compiler and cross compiler is that the compiler is software that transforms the computer program written in a high level programming language into the machine language while cross compiler is a type of a compiler that is capable of creating executable code for various platforms.

Is GCC a cross compiler?

For instance when installing GCC, the GNU Compiler Collection, we can use –target= target to specify that we want to build GCC as a cross-compiler for target . Mixing –build and –target , we can cross-compile a cross-compiler; such a three-way cross-compilation is known as a Canadian cross.

Is p-code still a compiler option?

Yes, P-Code is still a compiler option. After you have loaded a project and are ready to produce an EXE, your File menu might look like Figure 20.1. When you choose Make, you will see another dialog box that enables you to set various compiler options.

What is a p-code program?

3. SYSTEM SOFTWARE PCODE n The P-code object program is often much smaller than a corresponding machine code (native code) program would be Fig 3.1 Translation and Execution Using a P-code Compiler4. P-CODE MACHINE Portable code machine is a virtual machine designed to execute p-code.

What is the difference between p-code and machine code?

Generating machine code is one of the more complicated parts of writing a compiler. By comparison, generating p-code is much easier because no machine-dependent behaviour must be considered in the generation of the bytecode. This makes it useful for getting a compiler up and running quickly.

What is the difference between p-code and bytecode?

By comparison, generating p-code is much easier because no machine-dependent behaviour must be considered in generating the bytecode. This makes it useful for getting a compiler up and running quickly. Since p-code is based on an ideal virtual machine, a p-code program is often much smaller than the same program translated to machine code.

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