Claude
40632f192c
Implement codegen for state dispatch, functions, arrays, math, scroll
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State machine dispatch:
- Assign each state a numeric index, store in ZP $03
- Main loop dispatch table: CMP + BNE + JMP trampoline pattern
(avoids branch range limits for large programs)
- on_enter/on_exit handlers generated as JSR targets
- Transition statement writes state index + JSR enter/exit handlers
Function calls:
- Function bodies emitted as labeled subroutines with RTS
- Statement::Call generates parameter passing via ZP + JSR
- Statement::Return generates RTS (with value in A if present)
- Parameter slots at ZP $04-$07
Break/continue:
- Loop stack tracks continue/break label pairs
- Break generates JMP to break_label
- Continue generates JMP to continue_label
- While and Loop push/pop the stack
Array indexing:
- LValue::ArrayIndex generates TAX + STA absolute,X
- Expr::ArrayIndex generates TAX + LDA absolute,X / ZP,X
- Compound array assignments (+=, -=, &=, |=, ^=) load-modify-store
Scroll:
- scroll(x, y) writes to PPU $2005 twice (X then Y)
Math:
- Multiply generates JSR __multiply (shift-and-add routine)
- Divide generates JSR __divide (restoring division)
- Modulo loads remainder from $03 after divide
- ShiftLeft generates ASL A, ShiftRight generates LSR A
- Math routines wired into linker
Error validations:
- E0203 for assignment to const variables
- Break/continue outside loop detection (in_loop tracking)
233 tests (8 new codegen + 2 analyzer + 2 integration), all passing.
https://claude.ai/code/session_01W6eQFStA66EuMKHUFo2rx3
2026-04-12 02:04:49 +00:00
Claude
5434dda114
M4+M5: Optimizer passes, type casting, bank switching, math runtime
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Milestone 4 — Optimization & Polish:
- Strength reduction: multiply by power-of-2 → shift left
- Zero-page promotion analysis: rank variables by access frequency
- `as` type casting expression in parser/AST/analyzer
- `scroll(x, y)` statement
- `--asm-dump` flag for viewing generated assembly
- Extended optimizer tests (strength reduction, frequency analysis)
Milestone 5 — Bank Switching & Release:
- Mapper support: MMC1 (1), UxROM (2), MMC3 (4) in parser and ROM builder
- Bank declarations: `bank Name: prg` / `bank Name: chr`
- Linker::with_mapper for mapper-aware ROM generation
- Software multiply (8x8→16, shift-and-add algorithm)
- Software divide (8÷8→8, restoring division algorithm)
- ROM tests for mapper encoding round-trip
- Integration test for MMC1 compilation
210 tests total (18 new), all pre-commit checks pass.
https://claude.ai/code/session_01W6eQFStA66EuMKHUFo2rx3
2026-04-12 00:22:11 +00:00
Claude
058f7a87b6
M3: Asset pipeline, sprite/palette/background declarations, debug symbols
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Parser extensions:
- sprite declarations with chr: @chr("file.png"), @binary("file.bin"), or inline [hex]
- palette declarations with colors: [0x0F, 0x00, 0x10, 0x20]
- background declarations with chr: asset source
- @chr/@binary asset source parsing
- load_background and set_palette statements
- --debug CLI flag (plumbed through, not yet wired to codegen)
Asset pipeline (new module):
- PNG → CHR tile conversion using image crate (8x8 tiles, 2-bitplane encoding)
- NES color palette table (all 64 standard NES colors as RGB)
- Nearest-color matching (Euclidean distance in RGB space)
Debug module (new):
- Source map (ROM address → source Span mapping)
- Debug symbols with variable address table
- Mesen-compatible .mlb label export
- .sym symbol table export
192 tests total (13 new: 5 parser + 3 asset + 5 debug)
https://claude.ai/code/session_01W6eQFStA66EuMKHUFo2rx3
2026-04-12 00:09:47 +00:00
Claude
0dc06f7f1a
M2: Wire IR pipeline, add Coin Cavern example and integration tests
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Pipeline:
- main.rs now runs IR lowering and optimization before codegen
- IR is built and optimized but output still uses AST-based codegen
(IR-based codegen is a future improvement)
Coin Cavern example (examples/coin_cavern.ne):
- 3-state game: Title → Playing → GameOver
- Functions (clamp_x), constants, gravity physics, coin collection
- Demonstrates most M2 language features
Integration tests (14 total, 7 new):
- program_with_functions: functions with params and return values
- program_with_while_loop: while loops compile correctly
- program_with_fast_slow_vars: placement hints accepted
- program_with_multi_state_transitions: 3-state cycle
- coin_cavern_compiles: full Coin Cavern example
- ir_pipeline_produces_ir: validates IR lowering + optimizer
- error_test_recursion_detected: E0402 for recursive functions
https://claude.ai/code/session_01W6eQFStA66EuMKHUFo2rx3
2026-04-11 23:34:35 +00:00
Claude
39ca246151
Implement NEScript compiler Milestone 1 ("Hello Sprite")
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Complete implementation of the NEScript compiler pipeline for M1:
- Lexer: full tokenization with hex/binary/decimal literals, all keywords, operators
- Parser: recursive descent with Pratt expression parsing (M1 subset)
- Analyzer: symbol resolution, type checking, memory allocation
- 6502 Assembler: full opcode encoding table (~150 valid combinations)
- Code Generator: AST → 6502 instructions (direct, no IR for M1)
- Runtime: NES hardware init, NMI handler, controller read, OAM DMA
- Linker: NROM layout, vector table, palette loading, CHR data
- ROM Builder: iNES header generation, PRG/CHR padding
- CLI: `build` and `check` subcommands via clap
143 tests across all modules:
- 22 lexer tests (literals, keywords, operators, error recovery)
- 18 parser tests (expressions, statements, game structure, errors)
- 7 analyzer tests (symbol resolution, memory allocation, transitions)
- 30 assembler tests (every addressing mode, label resolution)
- 7 codegen tests (var init, arithmetic, buttons, draw, comparisons)
- 11 runtime tests (init sequence, NMI handler, controller read)
- 10 ROM builder tests (iNES format, mirroring, banking, validation)
- 5 linker tests (vector table, CHR data, palette loading)
- 7 integration tests (end-to-end compilation, error detection)
CI: GitHub Actions for check, fmt, clippy, test
Pre-commit: script for local fmt + clippy + test validation
https://claude.ai/code/session_01W6eQFStA66EuMKHUFo2rx3
2026-04-11 22:07:56 +00:00
