Initial project import

tools/v/examples/wasm_codegen/hello_wasi.v

@@ -0,0 +1,30 @@
+import wasm
+
+fn main() {
+	mut m := wasm.Module{}
+	m.enable_debug('vlang')
+	m.new_function_import('wasi_unstable', 'proc_exit', [.i32_t], [])
+	m.new_function_import('wasi_unstable', 'fd_write', [.i32_t, .i32_t, .i32_t, .i32_t], [
+		.i32_t,
+	])
+	m.assign_memory('memory', true, 1, none)
+
+	m.new_data_segment('CIOVec.str', 0, [u8(8), 0, 0, 0]) // pointer to string
+	m.new_data_segment('CIOVec.len', 4, [u8(13), 0, 0, 0]) // length of string
+	m.new_data_segment(none, 8, 'Hello, WASI!\n'.bytes())
+
+	mut func := m.new_function('_start', [], [])
+	{
+		func.i32_const(1) // stdout
+		func.i32_const(0) // *iovs
+		func.i32_const(1) // 1 iov
+		func.i32_const(-1) // *retptrs
+		func.call_import('wasi_unstable', 'fd_write')
+		func.drop()
+		func.i32_const(0)
+		func.call_import('wasi_unstable', 'proc_exit')
+	}
+	m.commit(func, true)
+
+	print(m.compile().bytestr())
+}