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>
2.3 KiB
2.3 KiB
Form A — A — Arithmetic (three-source FPU)
Bit Layout
| Bits | Field | Meaning |
|---|---|---|
| 0–5 | OPCD |
primary opcode (59 or 63) |
| 6–10 | FRT |
destination FPR |
| 11–15 | FRA |
source A FPR |
| 16–20 | FRB |
source B FPR |
| 21–25 | FRC |
source C FPR (multiplier for madd-style ops) |
| 26–30 | XO |
extended opcode (5 bits) |
| 31 | Rc |
record-form flag (updates CR1) |
Instructions Using This Form
| Mnemonic | Opcode | Group | Description |
|---|---|---|---|
fdivsx |
0xec000024 |
fpu | Floating Divide Single |
fsubsx |
0xec000028 |
fpu | Floating Subtract Single |
faddsx |
0xec00002a |
fpu | Floating Add Single |
fsqrtsx |
0xec00002c |
fpu | Floating Square Root Single |
fresx |
0xec000030 |
fpu | Floating Reciprocal Estimate Single |
fmulsx |
0xec000032 |
fpu | Floating Multiply Single |
fmsubsx |
0xec000038 |
fpu | Floating Multiply-Subtract Single |
fmaddsx |
0xec00003a |
fpu | Floating Multiply-Add Single |
fnmsubsx |
0xec00003c |
fpu | Floating Negative Multiply-Subtract Single |
fnmaddsx |
0xec00003e |
fpu | Floating Negative Multiply-Add Single |
fdivx |
0xfc000024 |
fpu | Floating Divide |
fsubx |
0xfc000028 |
fpu | Floating Subtract |
faddx |
0xfc00002a |
fpu | Floating Add |
fsqrtx |
0xfc00002c |
fpu | Floating Square Root |
fselx |
0xfc00002e |
fpu | Floating Select |
fmulx |
0xfc000032 |
fpu | Floating Multiply |
frsqrtex |
0xfc000034 |
fpu | Floating Reciprocal Square Root Estimate |
fmsubx |
0xfc000038 |
fpu | Floating Multiply-Subtract |
fmaddx |
0xfc00003a |
fpu | Floating Multiply-Add |
fnmsubx |
0xfc00003c |
fpu | Floating Negative Multiply-Subtract |
fnmaddx |
0xfc00003e |
fpu | Floating Negative Multiply-Add |