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millfork/CHANGELOG.md
Karol Stasiak 1e4a193741 Optimization hints
2021-03-15 00:44:14 +01:00

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Change log

Current version

  • Added optimization hints.

  • Added utf32be, utf32le, cp1253, cp1254, cp1257, geos_de encodings.

  • Fixed escape sequences in many encodings.

  • Fixed and documented absolute module imports (#106)

0.3.26 (2021-03-01)

  • Array fields in structs.

  • Various Apple II-related improvements, including ProDOS support (thanks to @retrac0).

  • Segment-related constants now match their equivalents from the platform definition. Missing constants have been defined.

  • Constants with heap start and segment start are now generated properly.

  • Signed multiplication support for sbyte and signed16.

  • Heavily experimental typeof builtin.

  • Self-modifying assembly code is now supported (#101).

  • Successful compilation now prints result program size.

  • Warning about data not being included in the output file.

  • Warnings can now be enabled and disabled individually.

  • Imported modules are now identified by their full relative path, not just the token used in the import statement (#89).

  • 6502: Fixed sbyte to word promotions in certain contexts.

  • 8080: Fixed compilation of sign extension of sbyte values into the BC register pair.

  • Fixed negative constant folding.

  • Fixed optimizations around macro invocations.

  • 6502: Fixed code deduplication in presence of trampolined functions.

  • Optimized word shifts for between 7 and 12 bits.

  • Allowed new lines after =.

  • Various optimization improvements.

  • Improved some error messages (thanks to @agg23).

  • Other fixes and improvements.

0.3.24 (2020-12-02)

  • Preliminary support for TRS-80 Model 1 and 3 running TRS-DOS.

  • Preliminary support for Robotron Z1013.

  • Allowed defining entry points other than the start of the segment for Atari, ZX Spectrum, CoCo, Z1013 and TRS-80. (#78)

  • Allowed the : operator in const-pure functions.

  • Added pointer.interrupt and pointer.kernal_interrupt types.

  • Implemented readline and readword for VIC-20.

  • init_rand_seed uses the POKEY on Atari.

  • Useless labels are no longer emitted into the label file.

  • VIC-20: added readline and readword.

  • Atari: use POKEY for randomness source.

  • New output format elements: ASCII string, program name.

  • Fix: Pointers to functions with parameters (#86)/

  • Fix: more instances of memset loops should be detected and optimized (#59).

  • Fix: things mentioned in the segment layout should not be deleted even if unused.

  • Fix: endaddr+N output format.

  • 65816: some code generation fixes.

  • 8080: word negation now works.

  • Various optimization improvements.

  • Various other fixes.

  • Improved some error messages.

  • Even more new Atari examples (thanks to @zbyti).

  • Build process slightly changed.

0.3.22 (2020-09-15)

  • Added local labels in assembly.

  • Added alternate decimal operators (with $ instead of ').

  • Potentially breaking change! Identifiers no longer can end with $.

  • Added z80next as an alternate name for the ZX Spectrum Next's processor (#55).

  • Added encodings: brascii, macroman, dmcs, lics.

  • Improved some error messages.

  • Fix: interrupt functions written in assembly no longer have the default prologue (#62).

  • Fixed the a8_os module (#58).

  • Fixed evaluation of division of large constants.

  • Fix: Structure alignment is now respected for substructures.

  • X16: Fixed the address of vera_dc_hscale_hstop register (#54) (thanks to @Kobrasadetin).

  • Fixed evaluation of more complex boolean expressions (#56).

  • Fixed accesses to volatile variables.

  • 8080/Z80: Optimization improvements.

  • 6809: Optimization improvements.

  • Various Atari improvements (#60, #63, #65) (thanks to @zbyti).

  • New Atari examples (thanks to @zbyti).

0.3.18 (2020-04-08)

  • Support for Motorola 6809 (complete, but still experimental).

  • Preliminary support for Tandy Color Computer running RS-DOS.

  • Preliminary support for 16K cartridges for Tandy Color Computer.

  • Added support for modifying large variables via pointers.

  • Added the ability to declare structure alignment.

  • for loops over arrays.

  • Allowed defining custom text encodings. Potentially breaking change! There are no built-in encodings now, the include path needs to contain the necessary encodings.

  • Fixed encodings: apple2, atasciiscr, iso_de, iso_no, iso_se, koi7n2, msx_jp, oldpet, origpet, petscii, petsciijp, petscr, petscrjp, zx80.

  • Added encodings: apple2c, apple2e, apple2gs, coco, cocoscr, cpc_da, cpc_en, cpc_es, cpc_fr, cp437, cp850, cp851, cp852, cp855, cp858, cp866, cp1250, cp1251, cp1252, ebcdic, galaksija, iso8859_1, iso8859_2, iso8859_3, iso8859_4, iso8859_5, iso8859_7, iso8859_9, iso8859_10, iso8859_13, iso8859_14, iso8859_16, kamenicky, koi8e, koi8f, koi8r, koi8ru, koi8t, koi8u, mazovia, pcw, pokemon1en, pokemon1es, pokemon1fr, pokemon1jp.

  • Added ENCODING_NOLOWER preprocessor feature.

  • Fixed raw views of typed pointers.

  • Fixed dead code elimination (#51).

  • Potentially breaking change! Changed default encoding for CPC to cpc_en.

  • Potentially breaking change! Changed the type of mouse_lbm and mouse_rbm to bool. Added mouse_mbm

  • Potentially breaking change! Renamed the x_coord module to coord. Added the y_coord type and TALLSCREEN preprocessor feature.

  • Added pscrstr2word function.

  • Labels with fixed addresses are now exported to the label file (#49).

  • Fixed address of the VIC 20 volume register (#52) (thanks to @nippur72).

  • Fixed and improved stdlib optimizations.

  • Allow importing modules from subdirectories.

  • Allow placing platform definitions in a dedicated subdirectory.

  • Allow using Batch files with the -r option.

  • Improved error reporting for constants used before their definitions.

  • Improved typo hints.

  • Typo hints for non-ASCII characters.

  • Z80: Intel syntax for all Z80 instructions, based on Digital Research's Z80.LIB.

  • Commander X16: Updated to support VERA 0.9 and the new joystick API. Added mouse support.

  • 6502: Optimization improvements:

    • Fixed index register optimization regressions.

    • Small array optimizations are now available for more operations.

    • Index calculations for arrays of structs with sizes divisible by an even power of two are now sometimes optimized.

    • Redundant index calculations are now removed.

0.3.16 (2020-04-08)

  • Language improvements:

    • Added compile-time evaluation for user-defined functions.

    • Added breakpoint macro (#44).

    • Potentially breaking change! Added min, max and if compile-time functions.

    • Added experimental signed16 and unsigned16 types.

    • Added length-prefixed strings (Pascal strings).

    • Improved operator support for word-sized arguments (#24, #25).

    • Potentially breaking change! Various macros improvements, including the requirement of parameter types matching exactly (#23, #39, #40).

  • Compiler improvements:

    • 6809 improvements (no full support yet).

    • Added warnings for calling from one segment to another overlapping one.

    • 6502: Fixed undocumented mnemonics.

    • Create output directories when needed (#21).

    • Allow defining different output formats for different segments when outputting one file per segment.

    • Fixed multiple optimization bugs (#32, #38, #41, #46 and others) – thanks to @agg23 for detailed bug reports!

    • 6502: Fix boolean arrays and pointers (#28).

    • Fixed and improved memset-like loops (#47).

    • Minor improvements to inline assembly.

    • Improvements to constant evaluation, including more arithmetic operators.

    • Potentially breaking change! Detect overflowing constants, like const byte x = 256.

    • Optimization improvements.

    • 6502: Memory allocation improvements for pointers.

    • Support for MkImg (tool for creating BBC Micro disk images) and multiple output files on BBC Micro.

    • Other minor fixes.

  • Library improvements:

    • Added putsigned16 function.

    • Added pstring module and putpstr function.

    • Various improvements to the C64 libraries (thanks to @bsutherland).

    • Added detection for various PET variants and implemented readkey for PET.

    • Implemented readkey and readline for Apple II.

    • Changed the default load address for BBC Micro.

    • Multiple fixes to the string, scrstring and encconv modules.

    • Other minor fixes.

  • Other changes:

    • Created a pure-Millfork test suite.

    • Updated to Scala 2.12.11.

0.3.14 (2019-12-03)

  • Full assembly support for HuC6280.

  • Improvements to subroutine extraction; it's now much faster, less buggy and actually effective.

  • 8080: function parameters can now be optimized to registers.

  • Fixed error messages about invalid function flags.

  • 6502: Fixed compilation of interrupt routines.

  • 65C02: Fixed fatal bugs related to some 65C02 subtypes.

  • Other bug fixes.

0.3.12 (2019-11-06)

  • Breaking change! The petscr, petscrjp and atasciiscr encodings now use $E0, $E0 and $DB respectively as their string terminator.

  • Potentially breaking change! Changed the identifiers for various subtypes of the 65C02 processors.

  • Added nullchar_scr and NULLCHAR_SCR

  • Added the scrstring module

  • Added strz_from_screencode, strz_to_screencode, strzpaste and scrstrzpaste functions

  • Added the ability to convert from booleans to integers

  • Fixed the string escape bug

  • Unary minus and other parser improvements

  • Better error reporting

  • Other bugfixes

0.3.10 (2019-10-24)

  • Preliminary support for the CPU from ZX Spectrum Next.

  • Added the ability to define custom segment layouts.

  • Hardware definitions for Atari 8-bit (thanks to @FreddyOffenga)

  • Fixed BLL headers for Atari Lynx (#7).

  • Some improvements for Commander X16 (with help from @Ambez05)

  • Specified consistent behaviour of for loops (#8)

  • Fixed bugs with constant booleans.

  • Fixed bugs with arithmetic promotions of signed values.

  • Fixed a bug with unused global variable elimination (#10).

  • Fixed a bug with variable overlapping (#11).

  • 6502: Fixed a bug with flow analysis during optimizations.

  • 6502: Fixed a bug with certain 16-bit additions.

  • 8080: Fixed and optimized 16-bit comparisons.

  • 8080: Optimized some library functions.

  • Optimized certain byte comparisons and pointer indexing.

  • 6502: Optimized certain boolean conversions and some small array accesses.

  • Unused built-in functions are now removed more accurately.

  • Updated to Scala 2.12.10.

  • Added another NES example (thanks to @Garydos).

0.3.8 (2019-06-21)

  • sizeof now supports arrays.

  • Added -R option for specifying extra commandline parameters for emulators.

  • Added full 16-bit multiplication and unsigned division.

  • Added preliminary support for Atari Lynx (thanks to @Nullious).

  • Added preliminary support for EasyFlash.

  • Added preliminary support for Commander X16.

  • Allowed defining custom output padding byte value.

  • Allowed passing non-decimal numbers to the -D option.

  • Added the encconv module.

  • Added nullchar constant as the null terminator for strings and NULLCHAR feature to define its value.

  • Added vectrex, msx_br, koi7n2, iso15, zx80 and zx81 text encodings.

  • reset_joy is now defined to always reset all joypad state variables.

  • Fixed arithmetic promotion bugs for signed values.

  • Fixed parsing of zp_bytes in platform definitions.

  • Fixed several serious bugs related to cartridge-based targets.

  • 6502: Few minor optimization improvements.

  • 6502: Inlining improvements.

0.3.6 (2019-08-05)

  • Breaking change! The petscii encoding now uses the $C0-$DE range for uppercase characters instead of $60-$7E. This matches both the CC65 behaviour and the return values from readkey().

  • Added support for the Japanese version of Commodore 64.

  • Added segment block statement.

  • Added goto.

  • Added bool type.

  • Added function pointers – so far quite limited.

  • Added arrays of elements of size greater than byte.

  • Added .length for large arrays and .lastindex for numerically indexed arrays.

  • New text encodings: petjp, petscrjp, msx_intl, msx_jp, msx_ru.

  • Improved passing of register parameters to assembly functions.

  • Enabled declaring multiple variables in one line.

  • Fixed detection of duplicate names in declarations.

  • 6502: Fixed expressions of form p[i] <<= 1.

  • 6502: Fixed variable bit shifting.

  • 6502: Fixed word division by a divisor larger than 127.

  • 6502: Fixed byte multiplication.

  • 8080/Z80: Fixed byte division.

  • Fixed many optimization bugs:

    • incorrect removal of unused local variables;

    • incorrect removal of certain type casts;

    • broken parameter passing to tail calls;

    • 6502: miscompilation when using the zeropage pseudoregister;

    • 6502: stack overflow when inlining local variables into registers;

    • 6502: not setting the high byte to 0 when optimizing word multiplication by 0

    • 8080/Z80: compiler crash when compiling conditions;

    • 8080/Z80: miscompilation of code after if statements;

    • 8080/Z80: miscompilation near multiplication;

    • Z80: miscompilation when using stack variables.

  • Other fixes and improvements.

0.3.4 (2019-07-01)

  • Preliminary experimental Game Boy support.

  • Preliminary MSX support.

  • Super experimental and very incomplete Intel 8086 support via 8080-to-8086 translation.

  • Support for Intel 8085, together with illegal instructions.

  • More label file formats.

  • Added memory_barrier macro.

  • Added keyboard module.

  • Added random module.

  • Added init_rw_memory module for cartridge targets.

  • Breaking change! Preinitialized writable arrays on cartridge targets can no longer be read before an explicit call to init_rw_memory, either add the call or make the arrays const.

  • Added ensure_mixedcase function and oldpet and origpet text encodings.

  • Added MILLFORK_VERSION preprocessor parameter.

  • Added structs and unions.

  • Added unsigned byte division and modulo.

  • Pointers can now be allocated anywhere.

  • Pointers can now be typed.

  • Added nullptr.

  • You can now take a pointer to a stack variable.

  • Arrays can now have elements of types other than byte (still limited in size to 1 byte though) and be built out of struct literals.

  • Arrays can now be constant.

  • Arrays can now be local.

  • Added hint for identifiers with typos.

  • Aliases now also support subfields.

  • Short functions can be now defined using expression syntax.

  • On most Commodore targets printing double quote characters doesn't toggle the quotation mode anymore.

  • Potentially breaking change! Commodore 128 target no longer defines CBM_64 feature.

  • Fixed the NES examples and the nes_joy module.

  • 6502 targets can now define free zeropage bytes, not only pointers.

  • 6502: Fixed optimizations using index registers.

  • 6502: Fixed optimizations of comparisons.

  • 6502: Fixed optimizations near for loops over in-place lists.

  • Preprocessor: Added #use A=B directive

  • Preprocessor: Added if function

  • Preprocessor: Added #define directive.

  • Fixed volatile-related bugs.

  • Fixed optimizations removing jumps to jumps.

  • Fixed optimizations removing pointless stores to local variables.

  • Fixed name clashes when passing parameters to functions and macros.

  • Fixed #use not accessing all preprocessor parameters.

  • Fixed #pragma not respecting #if.

  • Fixed nested #ifs.

  • Fixed @long and @long_be array filters.

  • Fixed for-each loops with non-constant arrays.

  • 8080 and LR35902: Fixed inlining of byte-sized variables into registers.

  • 8080 and LR35902: fixed large stack variables.

  • Other bug fixes.

  • Optimization improvements.

0.3.2 (2018-12-28)

  • Almost complete support for the Zilog Z80, Intel 8080 and Sharp LR35902 microprocessors.

  • A very incomplete support for NEC PC-88, ZX Spectrum, CP/M and Amstrad CPC.

  • Unified the syntax of commandline switches.

  • Automatic detection of the standard include path.

  • Added aliases.

  • Added enumeration types.

  • Added the preprocessor.

  • Added for loops over enum types and in-place lists

  • Added align keyword for choosing data and code alignment.

  • Added original line numbers in assembler output.

  • Added sizeof operator.

  • Added preliminary support for volatile keyword.

  • Added multiplication of a 16-bit number by an unsigned 8-bit number.

  • Added more warnings.

  • Automatic selection of text encoding based on target platform.

  • Text literals can be now used as expressions of type pointer.

  • Extra z at the name of the encoding means that the string is zero-terminated.

  • Potentially breaking change! It's no longer allowed to define things with names that are keywords or builtins.

  • Potentially breaking change! Curly braces in text literals are now used for escape sequences.

  • Potentially breaking change! Changed the c64_basic module.

  • Potentially breaking change! scr now refers to the default screencodes as defined for the platform. Code that uses both a custom platform definition and the scr encoding needs attention (either change scr to petscr or add screen_encoding=petscr in the platform definition file).

  • Potentially breaking change! Platform definitions now need appropriate feature definitions. Code that uses a custom platform definitions will cause extra warnings until fixed.

  • Software variable stack for 6502.

  • Other optimizations and fixes for stack variables.

  • Various code deduplication optimizations.

  • Fixed emitting constant decimal expressions.

  • Fixed decimal subtraction.

  • Fixed signed comparison.

  • Fixed for...downto loops.

  • Fixed invalid optimization of loads before BEQ and similar

  • Fixed miscompiled nonet calls.

  • Parser performance improvement.

  • Standard libraries improvements.

  • Other improvements.

0.3.0 (2018-06-25)

  • Finally faster than C.

  • Licenced the standard library more permissively.

  • Preliminary Atari 2600, BBC Micro and LUnix support.

  • Added array initialization syntax with for.

  • Added multiple new text codecs.

  • Added character literals.

  • Added 24-bit farword type.

  • Special array layouts, e.g. @word.

  • Fixed invalid offsets for branching instructions.

  • Fixed incorrectly overlapping local variables.

  • Fixed broken downto loops.

  • Fixed broken comparisons between variables of different sizes.

  • Fixed several other bugs.

  • Tons of optimizer improvements.

  • Other improvements.

0.2.2 (2018-03-19)

  • Allowed adding constant words to variable bytes without the zeropage pseudoregister.

  • -fzp-register is now enabled by default, as the documentation has already been saying.

  • Allowed more kinds of constants within variable and array initializers.

  • Fixed several bugs.

  • Other improvements.

0.2 (2018-03-17)

  • Breaking change! Renamed inline to macro.

  • Breaking change! Added support for memory segments. Changed the platform definition file syntax.

  • Added preliminary support for 65CE02, HuC6280 and 65816 processors.

  • Added support for Famicom/NES and C64 with SuperCPU.

  • Added new -O1 optimization preset; old -O1 became -O2, old -O2 became -O3 and so on.

  • Added command line options for controlling the size-speed trade-offs.

  • Added support for parameters for macros written in Millfork.

  • Enabled calling macros with index expression parameters.

  • Enabled calling macros from assembly.

  • Added optimizer hints: inline, noinline, register.

  • Added command line flags --size, --fast, --blast-processing.

  • Removed command line flag --detailed-flow. Detailed flow analysis was slow, broken, hard to maintain, and didn't even help that much.

  • Added *'=, nonet, hi and lo operators.

  • Added support for zeropage pseudoregisters, allowing for some operators work with more types of operands.

  • Added return dispatch statements.

  • Added break and continue statements.

  • Allowed the else if combination (i.e. the else branch doesn't have to be in braces if it's just a single if-else statement).

  • Added octal and quaternary literals.

  • Fixed several allocation bugs.

  • Fixed several optimization bugs.

  • Fixed several C64 and C16 library bugs.

  • Fixed several other bugs.

  • Other improvements.

0.1 (2018-01-24)

  • Initial numbered version.