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Additional resources for 1983-1993.The wonder years of sequential Prolog implementation

Example text

One points to the caller’s arguments and one points to the definition’s arguments. The operation to be performed for each argument is obtained by a two-dimensional array lookup depending on the types of the caller argument and the definition argument. This lookup operation can be made extremely fast by a technique similar to direct threaded coding, where the address of the abstract instruction is obtained by adding two offsets. In the VAM1p there is a single pointer that points to compiled code representing the caller-definition pair.

Research Report No. 36 December 1993 42 Peter Van Roy part by private companies. The guiding force and main developer of SICStus is Mats Carlsson. Many other people have been part of the development team and have made significant contributions. In 1993, SICStus Prolog was probably the most popular high performance Prolog system running on workstations. SICStus is cheap, robust, fast, and highly compatible with the “Edinburgh standard”. It has been ported to many machines. It has flexible coroutining, rational tree unification, indefinite precision integer arithmetic, and a boolean constraint solver.

The following information is due to Gillet and the system documentation [67]. The first version, a structure-sharing system, was written in 1983–1984 and commercialized in 1985 as VM/Prolog. 13 It runs on system 370 under the VM and MVS operating systems. The system was ported to OS/2 with a 370 emulator. The system is WAM-based and supports delaying, rational tree unification, and indefinite precision rational arithmetic. 5). It supports mode declarations, but may generate incorrect code if the declarations are incorrect.

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