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chore: add migration/ bundle for cross-machine setup

Browse Source 
Bundles state that lives OUTSIDE the xenia-rs repo so a fresh clone on
another machine can be brought up to identical configuration via
migration/setup.sh:

  - claude-memory/             ~/.claude/projects/-home-fabi-RE-Project-Sylpheed/memory/
                               (103 files, 1.1 MB - MEMORY.md + every
                                project_xenia_rs_*.md from audits
                                addis_signext through audit-058)
  - project-root/dot-claude/   <project-root>/.claude/settings.json
                               (Stop hook + permissions)
  - project-root/ppc-manual/   <project-root>/ppc-manual/
                               (PowerPC reference docs, 397 files, 3.7 MB)
  - project-root/run-canary.sh <project-root>/run-canary.sh
  - README.md                  Human-readable setup checklist
  - setup.sh                   Idempotent installer (also reclones
                               xenia-canary at pinned HEAD 6de80dffe)
  - MANIFEST.md                Per-file mapping + per-file-not-bundled
                               restoration recipe

Excluded from bundle (not shippable via git):
  - Sylpheed ISO (7.8 GB; copyright; manual copy required)
  - sylpheed.db (395 MB; regenerable from XEX via analysis tooling)
  - target/ build artifacts (rebuild on target)
  - audit-runs probe firehoses (.log/.stdout/.stderr ~11 GB; rerun if needed)
  - audit-runs memory dumps (.bin ~4.5 GB; rerun audit-026/027/029 if needed)
  - xenia-canary checkout (setup.sh reclones from
    git.mc02.dev/fabi/Xenia-Canary.git at HEAD 6de80dffe)

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
This commit is contained in:
MechaCat02
2026-05-10 21:38:38 +02:00
parent 8e709b0a24
commit e6d43a23ac
505 changed files with 86028 additions and 0 deletions
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# `orcx` — OR with Complement
> **Category:** [Integer ALU](../categories/alu.md) · **Form:** [X](../forms/X.md) · **Opcode:** `0x7c000338`
<!-- GENERATED: BEGIN -->
## Assembler Mnemonics
| Mnemonic | XML entry | Flags | Description |
| --- | --- | --- | --- |
| `orc` | `orcx` | — | OR with Complement |
| `orc.` | `orcx` | Rc=1 | OR with Complement |
## Syntax
```asm
orc[Rc] [RA], [RS], [RB]
```
## Encoding
### `orcx` — form `X`
- **Opcode word:** `0x7c000338`
- **Primary opcode (bits 0–5):** `31`
- **Extended opcode:** `412`
- **Synchronising:** no
| Bits | Field | Meaning |
| --- | --- | --- |
| 0–5 | `OPCD` | primary opcode |
| 6–10 | `RT/FRT/VRT` | destination |
| 11–15 | `RA/FRA/VRA` | source A |
| 16–20 | `RB/FRB/VRB` | source B |
| 21–30 | `XO` | extended opcode (10 bits) |
| 31 | `Rc` | record-form flag |
## Operands
| Field | Role | Description |
| --- | --- | --- |
| `RS` | orcx: read | Source GPR (alias for RD in some stores). |
| `RB` | orcx: read | Source GPR. |
| `RA` | orcx: write | Source GPR (`r0`–`r31`). |
| `CR` | orcx: write (conditional) | Condition-register update. When `Rc=1`, CR field 0 (or CR6 for vector compares, CR1 for FPU) is updated from the result. |
## Register Effects
### `orcx`
- **Reads (always):** `RS`, `RB`
- **Reads (conditional):** _none_
- **Writes (always):** `RA`
- **Writes (conditional):** `CR`
## Status-Register Effects
- `orcx`: **CR0** ← signed-compare(result, 0) with `SO ← XER[SO]`, when `Rc=1`.
## Operation (pseudocode)
```
RA <- (RS) | ~(RB)
```
## C Translation Example
```c
/* C translation: the xenia-rs interpreter arm below in */
/* Implementation References is the authoritative semantic */
/* snapshot. Translate it line-by-line: */
/* - ctx.gpr[N] -> r[N] (or f[]/v[] for FPRs/VRs) */
/* - mem.read_u*/write_u* -> mem_read_u*_be / mem_write_u*_be */
/* - ctx.update_cr_signed(fld, v) -> update_cr_signed(fld, v) */
/* - ctx.xer_ca / xer_ov / xer_so -> xer.CA / xer.OV / xer.SO */
/* The Register Effects and Status-Register Effects tables above */
/* enumerate every side effect a faithful translation must emit. */
```
## Implementation References
**`orcx`**
- xenia-canary XML: [`tools/ppc-instructions.xml` — search for `mnem="orcx"`](../../xenia-canary/tools/ppc-instructions.xml)
- xenia-canary emit: [`src/xenia/cpu/ppc/ppc_emit_alu.cc:800`](../../xenia-canary/src/xenia/cpu/ppc/ppc_emit_alu.cc#L800)
- xenia-rs opcode: [`crates/xenia-cpu/src/opcode.rs:59`](../../xenia-rs/crates/xenia-cpu/src/opcode.rs#L59)
- xenia-rs decoder: [`crates/xenia-cpu/src/decoder.rs:807`](../../xenia-rs/crates/xenia-cpu/src/decoder.rs#L807)
- xenia-rs interpreter: [`crates/xenia-cpu/src/interpreter.rs:548-555`](../../xenia-rs/crates/xenia-cpu/src/interpreter.rs#L548-L555)
<details><summary>xenia-rs interpreter body (frozen snapshot)</summary>
```rust
PpcOpcode::orcx => {
// PPCBUG-028: same shape as andcx — operate in u32.
let rs32 = ctx.gpr[instr.rs()] as u32;
let rb32 = ctx.gpr[instr.rb()] as u32;
ctx.gpr[instr.ra()] = (rs32 | !rb32) as u64;
if instr.rc_bit() { ctx.update_cr_signed(0, ctx.gpr[instr.ra()] as u32 as i32 as i64); }
ctx.pc += 4;
}
```
</details>
<!-- GENERATED: END -->
## Special Cases & Edge Conditions
- **`RA ← RS OR (NOT RB)`.** The complement is on `RB`. Useful for setting bits *outside* a mask — e.g. `orc r3, r3, r4` sets in `r3` every bit *not* set in `r4`.
- **Idiom: `orc RA, RS, RS`** = `RS | ~RS` = `-1` (all ones). Cheaper-looking than constructing `−1` via `lis`+`ori`, but the assembler usually prefers `li RA, -1` or `eqv RA, RS, RS`.
- **Operand convention** is X-form (`RA` destination, `RS`/`RB` sources).
- **64-bit operation** on Xenon; xenia uses Rust's `!` on `u64` for full-width complement.
- **No `OE` or `XER` side effects.**
- **`Rc=1` CR0 update truncates to 32 bits in xenia-rs.** [`interpreter.rs:362`](../../xenia-rs/crates/xenia-cpu/src/interpreter.rs#L362). Because `~RB` typically has high bits set, `orc.` results often appear `LT` in the truncated CR0.
## Related Instructions
- [`orx`](orx.md) — base OR (no complement).
- [`andcx`](andcx.md) — AND-with-complement; sister `c` form.
- [`norx`](norx.md), [`nandx`](nandx.md) — full-result complements.
- [`eqvx`](eqvx.md) — `~(RS XOR RB)`.
## IBM Reference
- [AIX 7.3 — `orc` (OR with Complement)](https://www.ibm.com/docs/en/aix/7.3.0?topic=set-orc-complement-instruction)