![]() SwiftForth was implemented for ANS Forth compliance, and includes a copy of the Hayes compliance test suite. Wordlists in SwiftForth may have any number of threads the default number of threads is 31. Wordlists are multithreaded via a hashing mechanism to speed up the dictionary search process. The SwiftForth dictionary can accommodate word names up to 254 characters in length. All data objects that return addresses return full absolute addresses that can be passed to the host OS, if desired, without conversion. Forth execution tokens are relative to the start of the run-time memory space, but they are used only internally and do not need conversion. This feature is a natural consequence of subroutine threading, because i386 call instructions use relative addresses. SwiftForth is position independent, which means it can run wherever the host OS has loaded it without having to keep track of where that is.īy being position independent, SwiftForth simplifies and speeds up interactions with the host environment. SwiftForth runs in a single, contiguous, flat 32-bit address space. SwiftForth’s CPU register usage RegisterĪll other CPU registers are available for use without saving and restoring. Many of the kernel-level CODE words are marked to be inlined. The compiler will automatically inline a definition whose INLINE field is set. SwiftForth takes advantage of this by having a header flag that indicates if a word is to be compiled inline or called. The nature of a subroutine-threaded implementation lends itself to inline code expansion. At the end of a colon definition, the conventional EXIT is replaced by a subroutine return (or by tail recursion). SwiftForth substitutes direct code in place of subroutine calls wherever possible for efficiency.Ĭolon and code definitions do not have a code field distinct from the content of the definition itself data structures typically have a code field consisting of a call to the code for that data type. Subroutine threading is an implementation strategy in which references in a colon definition are compiled as subroutine calls. SwiftForth is a 32-bit, subroutine-threaded Forth system running as user application under Windows, Linux, and macOS. This section describes the implementation of the Forth virtual machine, and will be of interest to experienced Forth programmers. SwiftForth is designed to produce optimal performance. If you’re looking for something for your Beaglebone, Raspberry Pi, or other embedded ARM Linux board, check out SwiftX-ARM for Linux targets. SwiftForth requires an i386-compatible CPU. Command-line IDE for Linux: Linux 4.4 kernel or later (requires i386 32-bit library support).Command-line IDE for macOS: Mac OS X 10.6 through macOS 10.14 (requires 32-bit library support).GUI IDE for Windows: Windows 7 or later.These are the OS-specific requirements for SwiftForth: SwiftForth also includes the cross compiler, which compiles the kernel, so you can customize the kernel to your needs. The fully licensed version of SwiftForth includes complete source, including the kernel, Interactive Development Environment (IDE), and all features. Powerful rule-based optimizing compiler.Īfter installation, the full SwiftForth documentation (all in PDF format requires Adobe Reader) will be located in the SwiftForth/doc directory.Advanced debugging features include built-in cross reference, source browser, and disassembler/decompiler.Simple linking to the programmer’s editor of your choice.Command window provides interactive development environment.Includes SWOOP™, a powerful object-oriented Forth programming system.Easy access to all system functions and dynamic libraries.No need for an external compiler, assembler, or linker.SwiftForth brings the fast, powerful, ANS Forth programming language to Windows, Linux, and macOS. SwiftForth Programming Language References.Easy access to system functions via dynamic libraries.Libraries, Functions, Callbacks, and Threads.SWOOP: Object-Oriented Forth Programming.
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