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millfork/CHANGELOG.md
2019-04-15 01:58:51 +02:00

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# Change log
## Current version
* Preliminary experimental Game Boy support.
* Added `memory_barrier` macro.
* Added `random` module.
* Added `ensure_mixedcase` function and `oldpet` and `origpet` text encodings.
* Added `MILLFORK_VERSION` preprocessor parameter.
* Added structs.
* Pointers can now be allocated anywhere.
* Arrays can now have elements of types other than `byte` (still limited in size to 1 byte though).
* Added hint for identifiers with typos.
* Aliases now also support subfields.
* 6502: Fixed optimizations using index registers.
* Fixed volatile-related bugs.
* Fixed optimizations removing jumps to jumps.
* Fixed optimizations removing pointless stores to local variables.
* Fixed `#use` not accessing all preprocessor parameters.
* Fixed `#pragma` not respecting `#if`
* Optimization improvements.
## 0.3.2
* 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 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!** 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
* 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
* 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
* **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
* Initial numbered version.