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The Runtime Converter is an automatic tool which converts PHP source code into Java source code. There is a Java runtime library for certain features of the PHP language, as well as the ability to call into the PHP binary itself using JNI for PHP standard library and extension function calls.
Java bytecode is the instruction set of the Java virtual machine (JVM), the language to which Java and other JVM-compatible source code is compiled. [1] Each instruction is represented by a single byte , hence the name bytecode , making it a compact form of data .
Interpreter languages do not create machine-specific code and can be executed on any type of machine. [7] The development and debugging process is typically quicker due to less complexity and it has more flexibility. [7] There are clear disadvantages when translating high-level code with an interpreter. [7]
Some formats can contain machine code for different processors, with the correct one chosen by the operating system when the program is loaded. [3] [4] The design and/or choice of an object file format is a key part of overall system design. It affects the performance of the linker and thus programmer turnaround while a program is being developed.
An exception is when a processor is designed to use a particular bytecode directly as its machine code, such as is the case with Java processors. Machine code and assembly code are sometimes called native code when referring to platform-dependent parts of language features or libraries. [16]
On the other hand, this manual loop unrolling expands the source code size from 3 lines to 7, that have to be produced, checked, and debugged, and the compiler may have to allocate more registers to store variables in the expanded loop iteration [dubious – discuss]. In addition, the loop control variables and number of operations inside the ...
The GNU Compiler for Java (GCJ) is a discontinued free compiler for the Java programming language. It was part of the GNU Compiler Collection. [3] [4] GCJ compiles Java source code to Java virtual machine (JVM) bytecode or to machine code for a number of CPU architectures. It could also compile class files and whole JARs that contain bytecode ...
They provided an alternate binary format to machine code. At various times, Microsoft has said P-code is an abbreviation for either packed code [7] or pseudo code. [8] Microsoft P-code was used in Visual C++ and Visual Basic. Like other P-code implementations, Microsoft P-code enabled a more compact executable at the expense of slower execution.