10dc260f0c
CONSOLIDATION.md Phase 6. Both lived untracked in the project root -- on one
disk, backed up by nothing.
tools/ppc-manual/ 393 files, 3.7 MB. 455 instructions, 350 family pages,
598 mnemonics resolvable through index.json, plus the
generator that produced them.
tools/run-canary.sh the oracle launcher.
🔴 THE LAUNCHER WAS BROKEN IN TWO WAYS AND IS REWRITTEN, not copied:
* it pointed at `xenia-rs/sylpheed.iso`, a SYMLINK. Wine cannot resolve one
and says "path invalid", which reads as a corrupt image rather than a path
problem -- it has cost a session before. It now points at the real file and
warns if handed a symlink.
* it hardcoded one machine's absolute paths, and named `xenia-rs`, which this
consolidation retires. Now derived from the script's own location, with
SYLPH_CANARY_BIN / SYLPH_ISO overrides and a check that each exists.
The standing constraints are in its header where someone will read them: one
emulator at a time, Canary runs MUTED, and never judge a crash or a hang from
a Bash-launched run -- a SIGKILL that looked like the binary was the editor's
process supervisor.
⚠️ The manual's GENERATOR reads the xenia-rs source tree, which is going away.
Its decoder now lives here as crates/sylpheed-ppc, so the generator must be
repointed before it is run again. Recorded in the README rather than left for
someone to discover; the manual's content is checked in and regenerates from
nothing implicitly.
Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
44 lines
2.2 KiB
Markdown
44 lines
2.2 KiB
Markdown
# Form `XO` — XO — Extended, Overflow (ALU with OE/Rc)
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## Bit Layout
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| Bits | Field | Meaning |
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| --- | --- | --- |
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| 0–5 | `OPCD` | primary opcode (31) |
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| 6–10 | `RT` | destination GPR |
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| 11–15 | `RA` | source A |
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| 16–20 | `RB` | source B |
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| 21 | `OE` | overflow-enable flag |
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| 22–30 | `XO` | extended opcode (9 bits) |
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| 31 | `Rc` | record-form flag |
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## Instructions Using This Form
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<!-- GENERATED: BEGIN -->
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| Mnemonic | Opcode | Group | Description |
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| --- | --- | --- | --- |
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| [`subfcx`](../alu/subfcx.md) | `0x7c000010` | integer | Subtract From Carrying |
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| [`mulhdux`](../alu/mulhdux.md) | `0x7c000012` | integer | Multiply High Doubleword Unsigned |
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| [`addcx`](../alu/addcx.md) | `0x7c000014` | integer | Add Carrying |
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| [`mulhwux`](../alu/mulhwux.md) | `0x7c000016` | integer | Multiply High Word Unsigned |
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| [`subfx`](../alu/subfx.md) | `0x7c000050` | integer | Subtract From |
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| [`mulhdx`](../alu/mulhdx.md) | `0x7c000092` | integer | Multiply High Doubleword |
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| [`mulhwx`](../alu/mulhwx.md) | `0x7c000096` | integer | Multiply High Word |
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| [`negx`](../alu/negx.md) | `0x7c0000d0` | integer | Negate |
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| [`subfex`](../alu/subfex.md) | `0x7c000110` | integer | Subtract From Extended |
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| [`addex`](../alu/addex.md) | `0x7c000114` | integer | Add Extended |
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| [`subfzex`](../alu/subfzex.md) | `0x7c000190` | integer | Subtract From Zero Extended |
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| [`addzex`](../alu/addzex.md) | `0x7c000194` | integer | Add to Zero Extended |
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| [`subfmex`](../alu/subfmex.md) | `0x7c0001d0` | integer | Subtract From Minus One Extended |
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| [`mulldx`](../alu/mulldx.md) | `0x7c0001d2` | integer | Multiply Low Doubleword |
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| [`addmex`](../alu/addmex.md) | `0x7c0001d4` | integer | Add to Minus One Extended |
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| [`mullwx`](../alu/mullwx.md) | `0x7c0001d6` | integer | Multiply Low Word |
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| [`addx`](../alu/addx.md) | `0x7c000214` | integer | Add |
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| [`divdux`](../alu/divdux.md) | `0x7c000392` | integer | Divide Doubleword Unsigned |
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| [`divwux`](../alu/divwux.md) | `0x7c000396` | integer | Divide Word Unsigned |
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| [`divdx`](../alu/divdx.md) | `0x7c0003d2` | integer | Divide Doubleword |
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| [`divwx`](../alu/divwx.md) | `0x7c0003d6` | integer | Divide Word |
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<!-- GENERATED: END -->
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