wa-lang.org/wazero@v1.0.2/internal/integration_test/engine/testdata/global_extend.wat (about)

     1  (module
     2      (global $n i32 (i32.const -1))
     3      (func $extend (export "extend") (result i64)
     4          global.get $n
     5          i64.extend_i32_u
     6      )
     7  )