ovm - ARCHIVED - A stack based virtual machine to act as a target for other programming languages

Age	Commit message (Collapse)	Author
2023-11-02	Started work on preprocessing jump addresses	Aryadev Chavali

2023-11-01	Implemented MALLOC_STACK and SUB in the assembler	Aryadev Chavali

2023-11-01	Implemented stack versions of MGET and MSET in assembler	Aryadev Chavali

2023-11-01	Implemented OP_MSIZE into lexer/parser of ASM	Aryadev Chavali

2023-11-01	Implemented lexer and parser for new memory management instructions	Aryadev Chavali

2023-11-01	Add MULT to lexer and parser for assembler	Aryadev Chavali

2023-11-01	Fixed bug where comparators wouldn't be parsed correctly	Aryadev Chavali
	This is because comparators may apply to signed types, so I need to use the right parsing function.
2023-11-01	Clearer VERBOSE messages	Aryadev Chavali

2023-11-01	Parser now uses updated lexer	Aryadev Chavali
	Much simpler, uses a switch case which is a much faster method of doing the parsing. Though roughly equivalent in terms of LOC, I feel that this is more extensible
2023-11-01	Lexer now returns more descriptive tokens	Aryadev Chavali
	More useful tokens, in particular for each opcode possible. This makes parsing a simpler task to reason as now we're just checking against an enum rather than doing a string check in linear time. It makes more sense to do this at the tokeniser as the local data from the buffer will be in the cache most likely as the buffer is contiguously allocated. While it will always be slow to do linear time checks on strings, when doing it at the parser we're having to check strings that may be allocated in a variety of different places. This means caching becomes a harder task, but with this approach we're less likely to have cache misses as long as the buffer stays there.
2023-10-31	Allow hex literals for numbers	Aryadev Chavali
	As strto(ul\|ll) allow the parsing of hex literals of the form `0x`, we allow lexing of hex literals which start with `x`. They're lexed into C hex literals which work for strtol.
2023-10-31	Use standardised signed version of word type from base.h	Aryadev Chavali

2023-10-31	Moved inst module to lib	Aryadev Chavali
	As it has no dependencies on vm specifically, and it's more necessary for any vendors who wish to target the virtual machine, it makes more sense for inst to be a lib module rather than a vm module.
2023-10-31	asm/main logs are now indented and look prettier	Aryadev Chavali

2023-10-31	Lexer now returns errors on failure	Aryadev Chavali
	Currently only for invalid character literals, but still a possible problem.
2023-10-31	parse_word deals with characters now	Aryadev Chavali
	Just takes the character literally as a number.
2023-10-31	Changed asm/parser instruction push-reg->push.reg	Aryadev Chavali

2023-10-29	Added a "usage" message and colours for assembler	Aryadev Chavali
	Prints useful and pretty messages when verbose being at least 1.
2023-10-28	Introduce error reporting in asm/main	Aryadev Chavali
	Pretty simple implementation, I've stopped printing the tokens cos I think the lexer is done.
2023-10-28	asm/parser supports all opcodes, introduced parse errors	Aryadev Chavali
	Introduced some functions to parse differing types of opcodes. Use the same style of a.b.c... for namespacing or type specification for certain opcodes. Bit hacky and not tested, but does work. Parse errors can be reported with an exact location using the token column, line.
2023-10-28	Ignore comments (using semicolons) in lexer	Aryadev Chavali
	Easier to do it here than at the parser.
2023-10-28	Introduced a column and line for each token	Aryadev Chavali
	Accurate error reporting can be introduced using this.
2023-10-26	Plugged in asm/parser to asm/main	Aryadev Chavali
	Just prints instructions so far.
2023-10-26	Implemented a rudimentary parser with support for 4 instruction types	Aryadev Chavali

2023-10-26	Added support in lexer for negative numbers	Aryadev Chavali
	Though we deal with unsigned numbers internally, it should be possible to read and manipulate negative numbers through 2s complement. Later on we'll add support for signed operations via 2s complement, so this should be allowed.
2023-10-26	asm/main now uses TOKEN_STREAM_AT	Aryadev Chavali

2023-10-26	Lexer forces uppercase for symbols	Aryadev Chavali

2023-10-26	Auto fill licenses	Aryadev Chavali

2023-10-26	Unified literal for numbers, main program now tokenises	Aryadev Chavali

2023-10-25	Started working on a parser	Aryadev Chavali
	No implementations yet
2023-10-25	Separated lexer from main file in asm	Aryadev Chavali

2023-10-24	Wrote lexer for assembly	Aryadev Chavali
	Pretty simple tokeniser, doesn't do a lot and needs to error check better.
2023-10-23	Starting development on assembly language	Aryadev Chavali