Add br_on_exn instruction (#1016)

It takes two u32 immediates: the branch depth and an exception index. The
stack signature is `[expect_ref] -> [except_ref]`, so the `except_ref`
can be tested easily against multiple exception types.

1 files changed, 2 insertions, 0 deletions

diff --git a/src/binary-reader.h b/src/binary-reader.h
index 46424977..2a1f324d 100644
--- a/src/binary-reader.h
+++ b/src/binary-reader.h
@@ -178,6 +178,7 @@ class BinaryReaderDelegate {
   virtual Result OnOpcodeBare() = 0;
   virtual Result OnOpcodeUint32(uint32_t value) = 0;
   virtual Result OnOpcodeIndex(Index value) = 0;
+  virtual Result OnOpcodeIndexIndex(Index value, Index value2) = 0;
   virtual Result OnOpcodeUint32Uint32(uint32_t value, uint32_t value2) = 0;
   virtual Result OnOpcodeUint64(uint64_t value) = 0;
   virtual Result OnOpcodeF32(uint32_t value) = 0;
@@ -206,6 +207,7 @@ class BinaryReaderDelegate {
   virtual Result OnBlockExpr(Type sig_type) = 0;
   virtual Result OnBrExpr(Index depth) = 0;
   virtual Result OnBrIfExpr(Index depth) = 0;
+  virtual Result OnBrOnExnExpr(Index depth, Index event_index) = 0;
   virtual Result OnBrTableExpr(Index num_targets,
                                Index* target_depths,
                                Index default_target_depth) = 0;