Add tests

.github/workflows/tests.yml

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+name: Run tests
+
+# Build on every branch push, tag push, and pull request change:
+on: [push, pull_request]
+
+jobs:
+  run_tests:
+    name: Run tests
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: Compile libgfxd
+        run: gcc -shared -fPIC libgfxd/gfxd.c libgfxd/uc_f3d.c libgfxd/uc_f3db.c libgfxd/uc_f3dex.c libgfxd/uc_f3dex2.c libgfxd/uc_f3dexb.c libgfxd/uc.c -o libgfxd.so
+
+      - name: Install cross compiler and binutils
+        run: sudo apt-get install gcc-mips-linux-gnu binutils-mips-linux-gnu
+
+      - name: Build test data
+        run: make -C test
+
+      - name: Run tests
+        run: ./test/test.py

test/.gitignore

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+*.o
+*.bin
+*.txt

test/Makefile

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+# Compile C files and dump their .data section to binary
+
+CROSS := mips-linux-gnu-
+
+CC := $(CROSS)gcc
+OBJCOPY := $(CROSS)objcopy
+NM := $(CROSS)nm
+
+C_FILES := f3dex2.c
+BIN_FILES := $(C_FILES:.c=.bin)
+
+bin_files: $(BIN_FILES)
+
+test: bin_files
+	./test.py
+
+.PHONY: bin_files test
+
+%.bin: %.o
+	$(OBJCOPY) -O binary -j .data $< $@
+	$(NM) -f sysv $< > $(@:.bin=.txt)
+
+%.o: %.c
+	$(CC) -c -o $@ $^

test/f3dex2.c

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+#define F3DEX_GBI_2
+#include "gbi.h"
+
+Gfx emptyDList[] = {
+    gsSPEndDisplayList(),
+};
+
+Gfx oneTriDList[] = {
+    gsSPVertex(0x42042069, 3, 0),
+    gsSP1Triangle(0, 1, 2, 0),
+    gsSPEndDisplayList(),
+};
+
+Gfx setLights1DList[] = {
+    gsSPSetLights1(*(Lightsn *)0x09000000),
+};

test/gbi.h

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+#include "../libgfxd/gbi.h"