xenia-rs

Files

MechaCat02 82a9bff934 fix(cpu): PPCBUG-009/010+011/041+042+043 mul/div + srawx truncation

Phase 4 batch 4: mulwx, divwx (coupled +CR0), srawx/srawix (coupled +CR0).

- PPCBUG-009 mullwx: 32-bit ABI. Product truncated to u32 before write.
  OE handler still uses full i64 product to detect overflow.
- PPCBUG-010+011 divwx (coupled): quotient zero-extended (canary uses
  ZeroExtend(v, INT64_TYPE)). CR0 view via i32 — without this, a negative
  i32 quotient (e.g. -3 from -10/3) would be classified as positive in
  i64 view of the now-zero-extended writeback.
- PPCBUG-041+042+043 srawx/srawix (coupled): writeback uses `as u32 as u64`
  (was `as i64 as u64`). All-ones case (sh>=32 with negative input) writes
  0x00000000_FFFFFFFF instead of u64::MAX. CR0 view via i32. CA logic
  preserved unchanged (audit-verified independently correct).

Tests:
- mullwx_overflow_truncates_to_32 (PPCBUG-009).
- divwx_negative_quotient_zero_extends (PPCBUG-010+011).
- srawx_negative_value_zero_extends_upper (PPCBUG-041+043).
- srawix_high_count_negative_input_yields_low32_all_ones (PPCBUG-042+043).

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

2026-05-02 11:44:34 +02:00

xenia-analysis

xenia-analysis: unify disasm via xenia-cpu, split ingest/analyze, add sinks

2026-05-01 16:28:06 +02:00

xenia-app

xenia-app: observability subsystem, --parallel runtime, stress harness

2026-05-01 16:30:26 +02:00

xenia-apu

Initial commit: xenia-rs workspace for Xbox 360 RE

2026-04-16 23:14:56 +02:00

xenia-cpu

fix(cpu): PPCBUG-009/010+011/041+042+043 mul/div + srawx truncation