Fix BigE for Rework scanner-character-streams.

src/parsing/scanner-character-streams.cc

 // Copyright 2011 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "src/parsing/scanner-character-streams.h"
 
 #include "include/v8.h"
 #include "src/globals.h"
 #include "src/handles.h"
 #include "src/objects-inl.h"
@@ skipping 556 matching lines @@
   Chunk& current = chunks_[chunk_no];
 
   // Annoying edge case: Chunks may not be 2-byte aligned, meaning that a
   // character may be split between the previous and the current chunk.
   // If we find such a lonely byte at the beginning of the chunk, we'll use
   // one_char_buffer_ to hold the full character.
   bool lonely_byte = (chunks_[chunk_no].byte_pos == (2 * position + 1));
   if (lonely_byte) {
     DCHECK_NE(chunk_no, 0);
     Chunk& previous_chunk = chunks_[chunk_no - 1];
+#ifdef V8_TARGET_BIG_ENDIAN
+    uc16 character = current.data[0] |
+                     previous_chunk.data[previous_chunk.byte_length - 1] << 8;
+#else
     uc16 character = previous_chunk.data[previous_chunk.byte_length - 1] |
                      current.data[0] << 8;
+#endif
 
     one_char_buffer_ = character;
     buffer_pos_ = position;
     buffer_start_ = &one_char_buffer_;
     buffer_cursor_ = &one_char_buffer_;
     buffer_end_ = &one_char_buffer_ + 1;
     return true;
   }
 
   // Common case: character is in current chunk.
@@ skipping 60 matching lines @@
       return new OneByteExternalStreamingStream(source_stream);
     case v8::ScriptCompiler::StreamedSource::UTF8:
       return new Utf8ExternalStreamingStream(source_stream);
   }
   UNREACHABLE();
   return nullptr;
 }
 
 }  // namespace internal
 }  // namespace v8