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Release 4.8.1

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@dmsc dmsc released this 23 Oct 12:17
· 5 commits to master since this release
v4.8.1
0449a5e

Patch release 4.8.1

This version 4.8.1 is a minor bugfix release for the cross-compiler, a bug crept that produced bad code in very uncommon situations.

Also included are some size optimizations, the integer IDE is now 8176 bytes.

This is the original 4.8 version release announcement:

FastBasic 4.8 has functions!

This is a long overdue release. The main language addition is user-defined integer functions, complemented by floating-point DATA arrays and a large compiler/optimizer cleanup.

Language changes:

  • Adds user-defined integer functions. A PROC can return a value with RETURN expression, and the function is called from any integer expression with @name(...):

    PROC Square X
  RETURN X*X
ENDPROC

? @Square(5)

    Calls support nested and recursive functions.

  • RETURN can also be used without a value, as an early exit from a PROC. Active FOR loops are unwound before returning.

  • Adds floating-point DATA arrays. Use a name ending in %:

    DATA values%() = 1.0, 2.5, 3.75

    The elements can be read and written like other arrays.

  • %() can now be used on the left side of an assignment, allowing floating-point values to be stored through an address:

    %(1536) = 0.1234

  • INPUT now works correctly with BYTE and floating-point DATA arrays.

  • ENDPROC can now be abbreviated as EN.. If an IF is open, EN. closes the IF first, as before.

IDE and Atari compiler changes:

  • The native parser now reports an error for source lines longer than 255 characters instead of looping.
  • More parser and code-size optimizations; the integer IDE remains below 8 KB.
  • EN. abbreviation support is available in the native compiler too.

Fixes:

  • Fixes the cross compiler's floating-point SIN/COS link failure.
  • Fixes COLOR() tracking when PRINT statements are shortened by the optimizer.
  • Fixes INPUT into BYTE and floating-point DATA arrays.
  • Fixes -ls listings to use exactly the requested line width and to keep EOL bytes inside strings.
  • Fixes ordering of DATA and PROC blocks declared on the same line in the cross compiler.
  • Fixes the Windows test-runner build with newer MinGW and updates CI to the current Windows runner.

Cross Compiler:

  • New pattern-based peephole optimizer with many additional rules. The test suite now checks that every peephole rule is reached.
  • Constant-address POKE expressions, including symbolic byte addresses, are folded into compact NUM_POKE / BYTE_POKE forms.
  • INPUT directly into a variable no longer builds and stores a temporary address.
  • Unnecessary SADDR save/restore pairs around function calls are removed.
  • VAR = VAR + 1 is compiled to INC VAR; other common expression sequences are also simplified.
  • Function calls now produce a compile error when the target PROC has no value-returning RETURN.
  • Listing fixes and stable DATA/PROC ordering.

Documentation and tests:

  • Manual updated for functions, RETURN, EN., floating-point DATA and %() assignment.
  • Cross-compiler manual clarifications.
  • New editor test harness with 51 editor tests using the full mini65 E: emulation; the complete suite now has 161 tests.

Full Changelog: v4.8...v4.8.1

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