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127cd1b901
millfork/CHANGELOG.md
Karol Stasiak 127cd1b901 6502: Fix word multiplication by 0
2019-08-04 13:42:00 +02:00

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Change log

Current version

  • 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;

    • 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

  • 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

  • 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.