P5-T6. Adds docs/MATCHING_COOKBOOK.md (nine byte-proven compiler/assembler
findings, each with basis and limit), docs/MATCHING_CONVENTIONS.md (what counts
as a match, registry format, source naming, duplicate sharing, symbols, the
verification procedure, the firewall) and docs/PHASE5_VERIFICATION.md (outcome,
clean gates, bounded negatives, milestone request).
Tooling: make test and make check targets; region objects are now
symbol-localized so the documented duplicate-sharing mechanism (N registry rows
-> 1 source) links, covered by a synthetic test (53 tests).
Clean gates: 53/53 tests; make clean/all/cmp/SHA-1 green; make gate with one C
region -> c_regions=1, 0 differing bytes, SHA-1 e173426c...; 57 tracked files, 0
under any prohibited root. Phase 5 is not closed until the milestone is
confirmed.
P5-T5. Part A: the entry [0x800FB368,0x800FB410) is not compiler output. The
return address is round-tripped through an absolute global around the first
call, the range ends in break, the stack pointer is built from linker globals,
and the clear loop falls through with no jr ra. Two bounded compile experiments
failed and were stopped; the entry stays fallback and no C is claimed.
Part B: first byte-identical C match -- func_80017AD4 at 0x80017AD4..0x80017AE8
(20 bytes), src/func_80017AD4.c, registered in config/regions.tsv. make gate
reports c_regions=1, 0 differing bytes, SHA-1 e173426c157384ebf1b6caf8c6fea18a85a14af9.
Body is unique with one caller at 0x80014C14; a shared-tail near-miss was
checked and rejected as a duplicate. The Phase 3 baseline is unaffected.
Records six codegen findings, notably that GNU as expands the la macro with ori
while the original assembler (ASPSX 2.81) uses addiu, so la-using functions will
need maspsx. No ROM-derived material is tracked.
P5-T4: tools/sf3_match provides range/plan/build/gate. It compiles a C candidate
with the identified toolchain (egcs-2.91.66 psx, -O2 -G0 -mno-split-addresses),
compares the exact instruction range byte-for-byte against the original, and
builds the address-ordered executable from the tracked registry config/regions.tsv
(header 0x800 + data gaps + C regions, LMA 0x800, metadata discarded).
Promotes the Phase 4 ordered workflow from an ignored experiment to tracked
tooling. Verified: make gate with an empty registry and with one real C region
both reproduce SHA-1 e173426c...; the Phase 3 baseline is unchanged and green;
the synthetic suite is now 50 tests including deliberate-corruption failures and
safe refusal of an existing destination. No ROM-derived material is tracked.
P5-T3 revised: obtained the real PsyQ 4.4/4.5/4.6 SDK compilers (proprietary,
kept ignored) and ran CC1PSX 4.5 under the ignored wibo Win32 loader. The SDK's
own README and the binary agree: PsyQ 4.5 CC1PSX = egcs-2.91.66 (egcs-1.1.2),
target mips-sony-psx, assembler ASPSX 2.81.
The open decompals/old-gcc gcc-2.91.66-psx produces instruction-identical
output to the real CC1PSX across ~990 instructions in twelve probe files, so no
proprietary compiler is needed for the matching build. Five reconstructed
original functions are byte-identical with -O2 -G0 -mno-split-addresses.
Corrects the earlier gcc-2.7.2-psx selection, which was an artifact of the
invalid -mcpu=3000 spelling. Records the unresolved 0x8005DEF8 reconstruction.
P5-T3 follow-up: tested the two remaining GPL psx candidates. Both match the
same signatures as 2.7.2-psx but also synthesize the constant multiply, so
neither resolves the recorded divergence. SETUP now also records that the
old-gcc '-psx' builds are community GCC+patch reconstructions, and that the
real Sony PsyQ compilers exist in the mkst/esa psyq-binaries release (not
downloaded).
P5-T3: fingerprinted all eight decompals/old-gcc 0.17 cc1 candidates with
self-authored probes. gcc-2.7.2-psx is the only candidate matching the
ASPSX-style $at symbolic store, the same-register symbolic load, the
unsigned-char default, and the mfhi <scratch> magic-division allocation.
Five reconstructed original functions are byte-identical; 2.6.3-psx, vanilla
2.7.2, 2.7.2-cdk and 2.8.0/2.8.1/2.91.66/2.95.2 are eliminated. One bounded
constant-multiply synthesis divergence is recorded. No ROM-derived material is
tracked.
P5-T2: downloaded decompals/old-gcc 0.17 prebuilt cc1 binaries (GCC 2.6.3/2.7.2/
2.8.0/2.8.1/2.91.66/2.95.2 psx variants plus vanilla 2.7.2 and cygnus cdk) into
ignored tools/old-gcc/. All eight run on this host and self-identify; the two
sha256 values cross-checked against an independent project matched exactly.
Local GNU as accepts COP2/GTE with -march=r3000 -G0.
P5-T1: revalidated the clean payload-data baseline (28 tests, make clean/all,
cmp, SHA-1 e173426c...), reviewed the firewall and Git state, and inventoried the
USA toolchain-relevant codegen signatures and SDK version-marker provenance.
No ROM-derived bytes, strings, or listings are tracked.
Christopher Williams