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PC Readme
=========
Tucker Evans
October 16, 2019
PC parses and (starts to) compile a subset of pascal into X86-64
assembly.
Installation/Running
--------------------
PC can be installed into the local directory using `make`, this creates the
binary 'pc'. PC accepts a source file via stdin and will output assembly to
stdout (given it is compiled with the macro `GENERATE_CODE`). Errors are reported
on stderr; if the binary is compiled with the `DEBUG` macro then tokens, parse
trees, and scope information will also be printed to stderr.
Status
------
PC has a working frontend and an incomplete backend . PC currently can tokenize,
parse, and run semantic checks on source files. The code generation is currently
limited to:
- Output (write() calls)
- Expressions
- Function calls
- Addition/Subtraction
- Multiplication/Division
- Negation
- Variable access (Not Arrays)
- Statements
- Assignment
- Procedure calls
Therefore the current ToDo list for code generation is:
- Input via read() (emulating scanf c call)
- If statements
- While loops (statement)
- For loops (statement)
- Array Access
Other ToDo's
- Provide src/output files via flags.
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