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binary translation
In computing, binary translation (or (binary) recompilation) is the emulation of one instruction set by another through translation of binary code. Sequences of instructions are translated from the ''source'' to the ''target'' instruction set. In some cases such as instruction set simulation, the target instruction set may be the same as the source instruction set, providing testing and debugging features such as instruction trace, conditional breakpoints and hot spot detection.
The two main types are static and dynamic binary translation. Translation can be done in hardware (for example, by circuits in a CPU) or in software (e.g. run-time engines, statical recompiler, emulators).
== Motivation ==
Motivation for using the complex process of binary translation is either that a compilation of the source code to the destination platform or instruction set is not available (or technically problematic) or when the source code is plainly not available anymore (Abandonware).
Performance-wise static recompilations have the potential to achieve a better performance than real emulation approaches as in optimal case one overhead introducing interface is removed.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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