From f0a22a4941645c8c4534eca56efb6f7b29d7c668 Mon Sep 17 00:00:00 2001
From: Sebastian Macke <sebastian@macke.de>
Date: Thu, 23 Jul 2020 11:44:56 +0200
Subject: [PATCH] Add wasm compilation capabilities

---
 .gitignore              |  3 +++
 Makefile                | 10 +++++-----
 scripts/compile_fast.sh |  4 ++++
 scripts/compile_wasm.sh | 12 ++++++++++++
 4 files changed, 24 insertions(+), 5 deletions(-)
 create mode 100755 scripts/compile_fast.sh
 create mode 100755 scripts/compile_wasm.sh

diff --git a/.gitignore b/.gitignore
index b4ef40f..5211b40 100644
--- a/.gitignore
+++ b/.gitignore
@@ -59,3 +59,6 @@ fshistory
 
 # filesystem
 *.fs
+
+# webassembly
+*.wasm
diff --git a/Makefile b/Makefile
index 2ce2d11..a5b2f83 100644
--- a/Makefile
+++ b/Makefile
@@ -6,7 +6,7 @@ OBJS = main.o mz.o ram.o debugger.o cpu.o vga.o ports.o dos.o alloc.o keyb.o   \
 	sdl.o screen.o rom.o fs.o bios.o fonts.o pic.o pit.o mouse.o      \
 	clock.o fs4.o exit_strategy.o disk.o multiplex.o compare.o ems.o
 
-all: fshistory fs1.fs fs2.fs fs3.fs fs4.fs
+all: fshistory data/fs1.fs data/fs2.fs data/fs3.fs data/fs4.fs
 
 fshistory: ${OBJS}
 	${CC} -o fshistory ${OBJS} ${LDFLAGS}
@@ -28,16 +28,16 @@ fshistory.wasm: ${OBJS} libc.o
 	--export=MouseMotion                                    \
 	-o fshistory.wasm ${OBJS} libc.o
 
-fs1.fs: data/fs1.fs.bz2
+data/fs1.fs: data/fs1.fs.bz2
 	bzip2 -dk data/fs1.fs.bz2
 
-fs2.fs: data/fs2.fs.bz2
+data/fs2.fs: data/fs2.fs.bz2
 	bzip2 -dk data/fs2.fs.bz2
 
-fs3.fs: data/fs3.fs.bz2
+data/fs3.fs: data/fs3.fs.bz2
 	bzip2 -dk data/fs3.fs.bz2
 
-fs4.fs: data/fs4.fs.bz2
+data/fs4.fs: data/fs4.fs.bz2
 	bzip2 -dk data/fs4.fs.bz2
 
 libc.o: src/wasm_libc_wrapper
diff --git a/scripts/compile_fast.sh b/scripts/compile_fast.sh
new file mode 100755
index 0000000..a390ae4
--- /dev/null
+++ b/scripts/compile_fast.sh
@@ -0,0 +1,4 @@
+gcc -Ofast -DFS4 -DUNSAFE_RAM -ofshistory src/*.c src/cpu/cpu.c src/devices/*.c src/disasm/*.c src/dos/*.c src/fs/*.c src/utils/*.c  -lSDL2
+
+#cat src/*.c src/cpu/*.h src/cpu/*.c src/devices/*.c src/disasm/*.c src/dos/*.c src/fs/*.c src/utils/*.c > single.c
+#gcc -Ofast -DFS4 single.c -lSDL2
diff --git a/scripts/compile_wasm.sh b/scripts/compile_wasm.sh
new file mode 100755
index 0000000..b623992
--- /dev/null
+++ b/scripts/compile_wasm.sh
@@ -0,0 +1,12 @@
+#stop on error
+set -e
+
+#generate wasm file
+make clean
+rm -f fshistory.wasm
+make fshistory.wasm CC=clang LDFLAGS="--target=wasm32" CFLAGS="-Os --target=wasm32 -DFS4 -Werror -DUNSAFE_RAM -Wimplicit-fallthrough"
+
+wasm-gc fshistory.wasm
+wasm-strip fshistory.wasm
+
+wasm2wat fshistory.wasm | grep 'import\|export'