HLE CD boot: multi-phase sentinel scan + pass Highlander

The HLE CD_read sentinel scan now iterates across every session-2 track
when the scan from the boot-stub-supplied LBA misses, with a single-match
fallback for ASCII-tagged sentinels (CODE/STUB/SCOR/TITL).  Many discs
(Highlander, Battle Morph, BrainDead 13) supply MSF values that point to
session-2 lead-in instead of game data; scanning each session-2 track
in order locates the sync block reliably.

Also:
* CD_poll now reports A0 = end+4 (matching the real GPU CD ISR which
  pre-decrements before each long write), unblocking cmp+bge polling
  idioms used by Highlander.
* Boot stub buffers bumped from 256KB to 600KB to fit Battle Morph's
  ~414KB stub; both the cdintf raw-sector buffer and the jagcd_hle
  injection buffer kept in lockstep.
* New cdintf accessors: CDIntfGetSession2FirstTrackLBA(),
  CDIntfGetSession2TrackCount(), CDIntfGetSession2TrackLBA(i).
* Test harness test/test_cd_hle_boot.c discovers all .cue/.iso/.cdi
  under VJ_TEST_CD_ROOT (defaults to test/roms/private), runs each
  through 300 frames, and asserts PC stays in RAM, escapes self-loops,
  and visits more than a handful of unique addresses.  Defaults to
  cue-only via VJ_TEST_CD_EXTS.
* CHD support removed (libchdr deps deleted, .info dropped chd ext).
* test_hle_bios test cd_poll_a0_advances_past_end_after_read renamed
  + assertion updated to match the end+4 contract.

Current CUE baseline: 4 PASS / 5 FAIL.
PASS: Battle Morph, Dragon's Lair, Highlander, Space Ace.
FAIL: Baldies, BrainDead 13, Hover Strike, Iron Soldier 2, Primal Rage
(all blocked on GPU CD ISR streaming or post-load downstream waits).

Made-with: Cursor

Author: JoeMatt

.gitignore

@@ -24,14 +24,11 @@ test/test_blitter_simd
 test/test_cd_boot
 test/*.dSYM/
 
-# One-off tools
-chd_dump
-chd_dump.c
-
 # Private test ROMs
-test/roms/private/*
+# test/roms/private/*
 !test/roms/private/.gitkeep
 !test/roms/private/README.md
+/test/test_cd_hle_boot
 /test/test_dsp_instructions
 /test/test_gpu_instructions
 /test/test_hle_bios

CLAUDE.md

@@ -66,7 +66,7 @@ Core options defined in `libretro_core_options.h` control blitter mode, BIOS usa
 
 ### Jaguar CD Emulation
 
-CD support is implemented across `src/cdrom.c` (BUTCH chip / FIFO / DSA commands), `src/cdintf.c` (disc image loading: CUE/BIN, CHD, CDI), and hooks in `src/jaguar.c` (BIOS auth bypass, boot stub injection).
+CD support is implemented across `src/cdrom.c` (BUTCH chip / FIFO / DSA commands), `src/cdintf.c` (disc image loading: CUE/BIN, ISO, CDI), and hooks in `src/jaguar.c` (BIOS auth bypass, boot stub injection).
 
 Key docs:
 - `docs/butch-registers.md` — full BUTCH register map ($DFFF00-$DFFF2F) with bit definitions

Makefile

@@ -62,8 +62,8 @@ ifeq ($(platform), unix)
 # Platform affix = classic_<ISA>_<µARCH>
 # Help at https://modmyclassic.com/comp
 
-# (armv7 a7, hard point, neon based) ### 
-# NESC, SNESC, C64 mini 
+# (armv7 a7, hard point, neon based) ###
+# NESC, SNESC, C64 mini
 else ifeq ($(platform), classic_armv7_a7)
 	TARGET := $(TARGET_NAME)_libretro.so
 	fpic := -fPIC
@@ -88,13 +88,16 @@ else ifeq ($(platform), classic_armv7_a7)
 	    LDFLAGS += -static-libgcc -static-libstdc++
 	  endif
 	endif
-#######################################	
-	
+#######################################
+
 # OSX
 else ifeq ($(platform), osx)
 	TARGET := $(TARGET_NAME)_libretro.dylib
 	fpic := -fPIC
 	SHARED := -dynamiclib
+	CFLAGS += -Ofast
+	CXXFLAGS += $(CFLAGS)
+	HAVE_NEON = 1
 	ifeq ($(arch),ppc)
 		FLAGS += -DMSB_FIRST
 		OLD_GCC = 1
@@ -123,6 +126,10 @@ else ifneq (,$(findstring ios,$(platform)))
 	fpic := -fPIC
 	SHARED := -dynamiclib
 	MINVERSION :=
+	CFLAGS += -Ofast
+	CXXFLAGS += $(CFLAGS)
+	HAVE_NEON = 1
+
 	ifeq ($(IOSSDK),)
 		IOSSDK := $(shell xcodebuild -version -sdk iphoneos Path)
 	endif
@@ -582,7 +589,7 @@ CXXFLAGS += $(FLAGS)
 CFLAGS   += $(FLAGS)
 
 OBJOUT   = -o
-LINKOUT  = -o 
+LINKOUT  = -o
 
 ifneq (,$(findstring msvc,$(platform)))
 	OBJOUT = -Fo
@@ -623,7 +630,7 @@ clean:
 TEST_CC     ?= $(CC)
 TEST_CFLAGS  = -O0 -g -Wno-incompatible-pointer-types
 TEST_LDFLAGS = -ldl
-TEST_BINS    = test/test_gpu_instructions test/test_dsp_instructions test/test_m68k_instructions test/test_irq test/test_hle_bios test/test_blitter_simd
+TEST_BINS    = test/test_gpu_instructions test/test_dsp_instructions test/test_m68k_instructions test/test_irq test/test_hle_bios test/test_cd_hle_boot test/test_blitter_simd
 
 test/test_gpu_instructions: test/test_gpu_instructions.c test/test_framework.h $(TARGET)
 	$(TEST_CC) $(TEST_CFLAGS) -o $@ $< $(TEST_LDFLAGS)
@@ -640,6 +647,9 @@ test/test_irq: test/test_irq.c test/test_framework.h $(TARGET)
 test/test_hle_bios: test/test_hle_bios.c test/test_framework.h $(TARGET)
 	$(TEST_CC) $(TEST_CFLAGS) -o $@ $< $(TEST_LDFLAGS)
 
+test/test_cd_hle_boot: test/test_cd_hle_boot.c test/test_framework.h test/cd_assertions.h $(TARGET)
+	$(TEST_CC) $(TEST_CFLAGS) -o $@ $< $(TEST_LDFLAGS)
+
 test/test_blitter_simd: test/test_blitter_simd.c src/blitter_simd.h $(TARGET)
 	$(TEST_CC) -O2 -o $@ test/test_blitter_simd.c src/blitter_simd_neon.c
 
@@ -658,12 +668,24 @@ test: test-build
 	done; \
 	exit $$fail
 
+# CD HLE boot smoke suite — separated from `test` because it intentionally
+# carries a known-failing TDD baseline. CI / pre-commit should call `test`
+# (which stays green); developers iterating on CD HLE call `test-cd-hle-boot`
+# directly and diff against test/cd_hle_boot_baseline.log.
+test-cd-hle-boot: test/test_cd_hle_boot
+	@echo ""; echo "=== CD HLE boot smoke (TDD baseline; not part of strict test) ==="
+	@DYLD_LIBRARY_PATH=. LD_LIBRARY_PATH=. test/test_cd_hle_boot \
+		> test/cd_hle_boot_baseline.log 2>&1; \
+	rc=$$?; \
+	grep -aE '\[(RUN|PASS|FAIL|CRASH|FOCUS-SKIP|SKIP|PC-)\]|Discovered|---' test/cd_hle_boot_baseline.log; \
+	echo ""; echo "(full log: test/cd_hle_boot_baseline.log; rc=$$rc)"; \
+	exit 0
+
 clean-test:
 	rm -f $(TEST_BINS) $(addsuffix .dSYM,$(TEST_BINS))
 
-.PHONY: clean test test-build clean-test
+.PHONY: clean test test-build clean-test test-cd-hle-boot
 endif
 
 print-%:
 	@echo '$*=$($*)'
-