Implement various stuff

README.md

@@ -1,7 +1,7 @@
 # .NET/Mono Bext Codegen
 
 > [!WARNING]
-> The Codegen is currently a work-in-progress and does not have anything useful implemented in it.
+> The Codegen is currently a work-in-progress.
 
 This is a codegen for [the B extended compiler](https://github.com/bext-lang/b). It introduces targets that produce [.NET](https://dotnet.microsoft.com/en-us/)/[Mono](https://www.mono-project.com/) compatible binaries.
 
@@ -18,10 +18,25 @@ $ ./build/b -tlist
 
 ## Targets and Dependencies
 
-Right now the codegen introduces only one target `ilasm-mono`. It expects `ilasm` and `mono` executables to be available in the `$PATH` environment variables. Lots of Linux distros provide them via the mono packages in their official repos:
+Right now the codegen introduces two targets `ilasm-mono` and `ilasm-core`.
+
+`ilasm-mono` target expects `ilasm` and `mono` executables to be available in the `$PATH` environment variables. Lots of Linux distros provide them via the mono packages in their official repos:
 
 ```consols
 $ sudo xbps-install mono      # Void Linux
 $ sudo apt install mono-devel # Ubuntu
 ...
 ```
+
+On Windows the `mono` executable isn't used so it doesn't need to be in `$PATH`, instead the `ilasm-mono` target executes the resulting binary using .NET Framework. Both .NET Framework's `ilasm` and [.NET Core's `ilasm`](https://www.nuget.org/packages/runtime.win-x64.Microsoft.NETCore.ILAsm) can be used by the target to compile the binary on Windows.
+
+.NET Core's `ilasm` can be also used on [Linux](https://www.nuget.org/packages/runtime.linux-x64.Microsoft.NETCore.ILAsm) and [macOS](https://www.nuget.org/packages/runtime.osx-arm64.Microsoft.NETCore.ILAsm) instead of Mono's `ilasm` if desired.
+
+`ilasm-core` target expects .NET 9 SDK/Runtime (or later) to be installed and the `dotnet` executable to be available in the `$PATH` environment variables. Lots of Linux distros provide them via `dotnet-sdk-[version]` (and `dotnet-runtime-[version]`) packages in their official repos:
+
+```consols
+$ sudo apt install dotnet-sdk-9.0 # Ubuntu
+...
+```
+
+It also expects the `ilasm` executable to be in the `$PATH` environment variables, which can be obtained from either Mono or the .NET Core ILAsm NuGet packages linked above (recommended), the .NET Framework one can be also used on Windows.

libb/ilasm-core.b

@@ -0,0 +1,29 @@
+// because Windows
+usleep(us) {
+    __asm__(
+        "ldarg.0",
+        "conv.i4",
+        "ldc.i4 1000",
+        "div",
+        "call void [mscorlib]System.Threading.Thread::Sleep(int32)",
+        "ldc.i8 0",
+        "ret"
+    );
+}
+
+char(s,n) {
+    __asm__(
+        "ldarg 0",
+        "ldarg 1",
+        "add",
+        "ldind.i1",
+        "conv.i8",
+        "ret"
+    );
+}
+
+extrn printf;
+__variadic__(printf, 1);
+extrn putchar;
+extrn getchar;
+extrn exit;

libb/ilasm-mono.b

@@ -1,7 +1,29 @@
-putchar(x) {
+// because Windows
+usleep(us) {
     __asm__(
         "ldarg.0",
-        "conv.u2",
-        "call void class [mscorlib]System.Console::Write(char)"
+        "conv.i4",
+        "ldc.i4 1000",
+        "div",
+        "call void [mscorlib]System.Threading.Thread::Sleep(int32)",
+        "ldc.i8 0",
+        "ret"
     );
 }
+
+char(s,n) {
+    __asm__(
+        "ldarg 0",
+        "ldarg 1",
+        "add",
+        "ldind.i1",
+        "conv.i8",
+        "ret"
+    );
+}
+
+extrn printf;
+__variadic__(printf, 1);
+extrn putchar;
+extrn getchar;
+extrn exit;