CL-Forth 1.4.1

Release 1.4.1 of CL-Forth

Optimization

CL-Forth now includes an experimental optimizer which tries to simplify the code generated by CL-Forth by eliminating as much use of the data stack as possible. There are additional optimizations applied to eliminate unnecessary validity checks when those checks can be shown to be redundant. (E.g, checking that the character count given to TYPE is not negative.)

The optimizer is controlled by a boolean flag whose address is stored in the OPTIMIZER variable. You change the value of this flag using the words ON and OFF.

To turn the optimizer on, execute OPTIMIZER ON and to turn it off, execute OPTIMIZER OFF.

Under SBCL, the Forth test suite runs approximately 33% faster and generates approximately 25% less object code.

By default, the optimizer is off.

Other Changes

• When using the :forth-source-file ASDF module type, if a Forth exception occurs while loading a Forth source file, display the exception phrase, Forth backtrace, data stack, and the source line that generated the error.
• (asdf:test-system '#:cl-forth) now runs the Forth test suite twice, first with the optimizer off and then with the optimizer on. If an error occurs during the test suite, CL-Forth displays the Forth backtrace and data stack.
• Increase the maximum number of locals in a definition from 16 to 32.
• Add SETINLINEABLE to enable or disable the inlining of an existing word. (E.g., FALSE SETINLINEABLE U.)
• Add P. to display the top of the stack as a pointer (i.e., 16 hex digits).
• Inline foreign function calls
• Inline references to variables defined by VALUE, 2VALUE, and FVALUE.
• Save the state of backtrace-on-error (SHOW-BACKTRACES) and the optimizer (OPTIMIZER) in templates.

CL-Forth 1.3.5

Release 1.3.5 of CL-Forth

Performance Improvements

• Change the FORTH-SYSTEM class to a structure. Update WITH-FORTH-SYSTEM to arrange for inlined slot access
• Change the WORDS, DICTIONARY, and WORD-LISTS classes to structures to get inlined slot access
• Change how parameters are saved in words to use a structure, eliminating the use of APPLY in FORTH-CALL
• Optimize the implementation of ACCEPT
• Optimize the character "primitives" EXTRACT-CHAR, FORTH-CHAR, NATIVE-CHAR
• Optimize the functions that convert between Forth strings and native strings
• Use EQL instead of CHAR-EQUAL in places where the overhead of CHAR-EQUAL is superfluous

Bug Fixes

• Fixes issue #1

CL-Forth 1.3

Release 1.3 of CL-Forth

FFI improvements:

• Support [OPTIONAL] with LIBRARY
• Change XLIBRARY to understand that, on Linux, library names frequently end with a version number (e.g., "libc.so.6", "libcurl.so.4.6.0") instead of the ".so" suffix.
• In CCL and SBCL, CFFI ignores the :library argument to cffi:foreign-funcall and cffi:foreign-symbol-pointer. Define a "libDefault" library so FUNCTION: and GLOBAL: can be used on those platforms without first loading a library.
• Improve the error messages when a foreign function or global is not found.
• In CCL and SBCL, omit the library name from the output of .IMPORTS as it's not accurate.
• In LispWorkds, suppress CFFI's created foreign funcallable announcement.
• FFI callbacks now save and restore the data and floating-point stacks locally to allow nested and/or concurrent callbacks.
• Add FFI.md
• Add an example of using the FFI

Other Highlights:

• Add BEGIN-NAMED-STRUCTURE to create a structure whose field names will include the structure's name.
• Add LFIELD: and WFIELD: to create longword (32-bit) and word (16-bit) structure fields, respectively.
• Add longword (nee, 32-bit) access words L@, UL@, L!, and L,.
• Add word (nee, 16-bit) access words W@, UW@, W!, and W,.
• Add pointer access words P@ and P!.
• Save the docstring in define-word and display it as part of the output of SEE.
• Allow building standalone applications with SBCL in addition to CCL.
• Catch Ctrl-C and abort to CL-Forth top level
• Add STATISTICS to report some usage statistics. Also, display the statistics when exiting CL-Forth.
• Updated README.md

Full Changelog: v1.2...v1.3

CL-Forth 1.2

Release 1.2 of CL-Forth

CL-Forth 1.1.2

Release 1.1.2 of CL-Forth