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Dyalog APL: Difference between revisions
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== Implementation == | == Implementation == | ||
Dyalog APL is implemented primarily in [[wikipedia:C (programming language)|C]] with some parts implemented in [[wikipedia:C++|C++]] in order to use [[wikipedia:C++#Templates|templates]]. C [[wikipedia:Intrinsic function|intrinsics]] are used to access instruction set extensions. Some architecture-specific [[wikipedia:Assembly language|assembly]], both compiled separately and inline from C, is used for functionality like [[wikipedia:Status register|exception flags]] which is not easily accessible in C. Prior to [[Dyalog APL versions#17.0|version 17.0]], assembly was also used for vectorized arithmetic. In 17.0, this code was replaced by a new C++ implementation. | |||
=== Internal types === | === Internal types === | ||
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* As of version 17.1, POWER7 and above are supported. Support for older systems is dropped because Dyalog compiles separate binaries for each POWER architecture. | * As of version 17.1, POWER7 and above are supported. Support for older systems is dropped because Dyalog compiles separate binaries for each POWER architecture. | ||
In Dyalog 17.0, the code for | In Dyalog 17.0, the code for vectorized [[scalar function]]s was unified and extended to allow Intel [[wikipedia:AVX2|AVX2]] and ARM NEON in addition to Intel [[wikipedia:SSE2|SSE2]] and [[wikipedia:SSE4.1|SSE4.1]], and AltiVec VMX for IBM POWER. This code is also used for operations involving the scalar dyadics [[Plus]], [[Minus]], [[Times]], [[Divide]], [[Maximum]], [[Minimum]], and [[comparison function]]s, as well as some functions derived from operators applied to these functions, such as the [[Outer Product]] and [[Inner Product]]. | ||
Dyalog also uses many other x86 extensions: | Dyalog also uses many other x86 extensions: | ||