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YAP is a high-performance Prolog compiler developed at LIACC/Universidade do Porto and at COPPE Sistemas/UFRJ. Its Prolog engine is based in the WAM (Warren Abstract Machine), with several optimizations for better performance. YAP follows the Edinburgh tradition, and is largely compatible with the ISO-Prolog standard and with Quintus and SICStus Prolog. YAP has been developed since 1985. The original version was written in assembly, C and Prolog, and achieved high performance on m68k based machines. The assembly code was used to implement the WAM emulators. Later emulators supported the VAX, SPARC, and MIPS architectures.
brew install yap