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
2.3 KiB
Markdown
44 lines
2.3 KiB
Markdown
# Form `A` — A — Arithmetic (three-source FPU)
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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 (59 or 63) |
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| 6–10 | `FRT` | destination FPR |
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| 11–15 | `FRA` | source A FPR |
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| 16–20 | `FRB` | source B FPR |
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| 21–25 | `FRC` | source C FPR (multiplier for madd-style ops) |
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| 26–30 | `XO` | extended opcode (5 bits) |
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| 31 | `Rc` | record-form flag (updates CR1) |
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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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| [`fdivsx`](../fpu/fdivsx.md) | `0xec000024` | fpu | Floating Divide Single |
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| [`fsubsx`](../fpu/fsubsx.md) | `0xec000028` | fpu | Floating Subtract Single |
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| [`faddsx`](../fpu/faddsx.md) | `0xec00002a` | fpu | Floating Add Single |
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| [`fsqrtsx`](../fpu/fsqrtsx.md) | `0xec00002c` | fpu | Floating Square Root Single |
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| [`fresx`](../fpu/fresx.md) | `0xec000030` | fpu | Floating Reciprocal Estimate Single |
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| [`fmulsx`](../fpu/fmulsx.md) | `0xec000032` | fpu | Floating Multiply Single |
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| [`fmsubsx`](../fpu/fmsubsx.md) | `0xec000038` | fpu | Floating Multiply-Subtract Single |
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| [`fmaddsx`](../fpu/fmaddsx.md) | `0xec00003a` | fpu | Floating Multiply-Add Single |
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| [`fnmsubsx`](../fpu/fnmsubsx.md) | `0xec00003c` | fpu | Floating Negative Multiply-Subtract Single |
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| [`fnmaddsx`](../fpu/fnmaddsx.md) | `0xec00003e` | fpu | Floating Negative Multiply-Add Single |
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| [`fdivx`](../fpu/fdivx.md) | `0xfc000024` | fpu | Floating Divide |
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| [`fsubx`](../fpu/fsubx.md) | `0xfc000028` | fpu | Floating Subtract |
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| [`faddx`](../fpu/faddx.md) | `0xfc00002a` | fpu | Floating Add |
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| [`fsqrtx`](../fpu/fsqrtx.md) | `0xfc00002c` | fpu | Floating Square Root |
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| [`fselx`](../fpu/fselx.md) | `0xfc00002e` | fpu | Floating Select |
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| [`fmulx`](../fpu/fmulx.md) | `0xfc000032` | fpu | Floating Multiply |
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| [`frsqrtex`](../fpu/frsqrtex.md) | `0xfc000034` | fpu | Floating Reciprocal Square Root Estimate |
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| [`fmsubx`](../fpu/fmsubx.md) | `0xfc000038` | fpu | Floating Multiply-Subtract |
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| [`fmaddx`](../fpu/fmaddx.md) | `0xfc00003a` | fpu | Floating Multiply-Add |
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| [`fnmsubx`](../fpu/fnmsubx.md) | `0xfc00003c` | fpu | Floating Negative Multiply-Subtract |
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| [`fnmaddx`](../fpu/fnmaddx.md) | `0xfc00003e` | fpu | Floating Negative Multiply-Add |
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<!-- GENERATED: END -->
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