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2024-04-09Fixed code in vm_pop_hword DWORD -> DHWORDAryadev Chavali
Though practically this would work, as the storage for the half word is not limited in any way, nevertheless it isn't syntactically right and it's better to fix now.
2024-04-09Completed TODO: Rigid EndianAryadev Chavali
Just used the endian.h functions to convert host endian to and from big endian.
2024-04-09Added todo to force an endian conventionAryadev Chavali
I've flip flopped a bit on this but I believe the virtual machine bytecode format must have a convention on endianness. This is because of the issue stated in the TODO which may very well happen.
2024-04-08Added better documentation to TODO listAryadev Chavali
2024-04-07Changed limit for examples/factorial.asmAryadev Chavali
Did some analysis and found that 21! takes above 64 bit integers to store hence set the limit to 20 instead.
2023-11-29Use a limit on $I rather than on $B for examples/fib.asmAryadev Chavali
2023-11-29Fixed issues with getting and setting words for heap pagesAryadev Chavali
Because I was using the hword macros instead of word macros, this causes truncation of bytes when I didn't want it.
2023-11-29Fixed logs in vm/runtimeAryadev Chavali
Just changing some messages and the format of heap printing
2023-11-29Cleaned up logs in assembler/parserAryadev Chavali
2023-11-29Easier to read documentation in examplesAryadev Chavali
2023-11-29Fixed incorrect free of tokens in error for preprocess_use_blocksAryadev Chavali
Also error now points to the correct place in the file.
2023-11-29Report some stats of the actual program when workingAryadev Chavali
2023-11-29Refactored preprocessor to preprocess_(use|macro)_blocks and process_presultsAryadev Chavali
We have distinct functions for the use blocks and the macro blocks, which each generate wholesale new token streams via `token_copy` so we don't run into weird errors around ownership of the internal strings of each token. Furthermore, process_presults now uses the stream index in each presult to report errors when stuff goes wrong.
2023-11-29Refactored presult_t to include a stream pointerAryadev Chavali
So when a presult_t is constructed it holds an index to where it was constructed in terms of the token stream. This will be useful when implementing an error checker in the preprocessing or result parsing stages.
2023-11-29Added parse errors for %USE callsAryadev Chavali
So %USE <STRING> is the expected call pattern, so there's an error if there isn't a string after %USE. The other two errors are file I/O errors i.e. nonexistent files or errors in parsing the other file. We don't report specifics about the other file, that should be up to the user to check themselves.
2023-11-29Fixed tokenise_string_literalAryadev Chavali
Forgot to increment buffer->used and memcpy call was just incorrect.
2023-11-29Added function to copy tokensAryadev Chavali
This essentially just copies the internal string of the token into a new buffer.
2023-11-29Added TOKEN_PP_USE to lexer with implementationAryadev Chavali
2023-11-29Moved preprocessor>Constants to Completed and started work on %USEAryadev Chavali
2023-11-29Added todo for preprocessor "%MACRO"Aryadev Chavali
This is different to "%CONST" in that it can take token parameters and use them. This allows the construction of user code at compile time, which can be very useful for a variety of use cases.
2023-11-29Added todo for preprocessor "%USE" blocksAryadev Chavali
Essentially importing another file *literally* into the file. This would happen before parse results are gathered, similar to how "%CONST" is implemented currently.
2023-11-29Cleaned up todos standard library a bit moreAryadev Chavali
2023-11-11Added string literals in tokeniserAryadev Chavali
Doesn't do much, invalid for most operations.
2023-11-09Use constants in examples where possibleAryadev Chavali
Stuff like numeric limits can be codified in constants which act self documenting.
2023-11-09Mark off constants as done in TODO.orgAryadev Chavali
2023-11-08Makefile now assembles and interprets instruction-test.asm example firstAryadev Chavali
2023-11-08Added a preprocessing routine in assemblerAryadev Chavali
Preprocessor handles macros and macro blocks by working at the token level, not doing any high level parsing or instruction making. Essentially every macro is recorded in a registry, recording the name and the tokens assigned to it. Then for every caller it just inserts the tokens inline, creating a new stream and freeing the old one. It leaves actual high level parsing to `parse_next` and `process_presults`.
2023-11-08Added log in assembler for reading a certain number of bytesAryadev Chavali
2023-11-08Lexer symbols now recognise macro constants and referencesAryadev Chavali
2023-11-08Fixed issue where, on error, runtime would show wrong instructionAryadev Chavali
When an error occurred, because prog->ptr was incremented beforehand the trace would show the next instruction as the culprit rather than the actual instruction. This commit fixes that by incrementing the program if and only if the command was run successfully.
2023-11-06Current work on preprocessorAryadev Chavali
2023-11-05Current work on preprocessor implementationAryadev Chavali
Lots to refactor and test
2023-11-05Redefined proposed syntax for preprocessor in TODO.orgAryadev Chavali
2023-11-04Added TODO for inlining labelsAryadev Chavali
2023-11-04Added tags for TODO.orgAryadev Chavali
2023-11-04Did some more work on the specAryadev Chavali
2023-11-04Fixed up example comments and some assemblyAryadev Chavali
2023-11-03Added steps to creating an in memory instance of the VMAryadev Chavali
This would be useful when writing an interpreted language where the "assembly" and the "execution" occur within the same executable.
2023-11-03Updated LOCAryadev Chavali
2023-11-03Cleaned up How to build section of READMEAryadev Chavali
2023-11-03Added Makefile recipe to interpret all examplesAryadev Chavali
2023-11-03Symbols may now include digits in lexerAryadev Chavali
This is mostly so labels get to have digits. This won't affect number tokens as that happens before symbols.
2023-11-03Removed tabs from VERBOSE logs in asm/main.cAryadev Chavali
2023-11-03Used more subroutines in fib.asm to make code clearerAryadev Chavali
Looks way more high level but parses down to a very simple bytecode. However, because of lack of inline code processing, it relies on the call stack quite heavily. With inline labels this would be a much more compact bytecode.
2023-11-03Use label features and entry points for examplesAryadev Chavali
2023-11-03Added note in TODO.orgAryadev Chavali
Implementing start points has made features necessary for a standard library setup easier to see.
2023-11-03Completed start points TODOAryadev Chavali
2023-11-03Fixed bug where labels were off by oneAryadev Chavali
Was used in a previous fix but not necessary anymore
2023-11-03Fixed bug where runtime would not start program at the right placeAryadev Chavali
In vm_execute_all set the program pointer to the start address in the header of the program payload.
2023-11-03Added memory-print.asm to examples list in MakefileAryadev Chavali
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