[wasm] Fix asm.js semantics for divide by zero in WASM translation.

src/wasm/wasm-opcodes.h

 // Copyright 2015 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.
 
 #ifndef V8_WASM_OPCODES_H_
 #define V8_WASM_OPCODES_H_
 
 #include "src/machine-type.h"
 #include "src/signature.h"
 
@@ skipping 242 matching lines @@
   V(F64Atan, 0xc2, d_d)                \
   V(F64Cos, 0xc3, d_d)                 \
   V(F64Sin, 0xc4, d_d)                 \
   V(F64Tan, 0xc5, d_d)                 \
   V(F64Exp, 0xc6, d_d)                 \
   V(F64Log, 0xc7, d_d)                 \
   V(F64Atan2, 0xc8, d_dd)              \
   V(F64Pow, 0xc9, d_dd)                \
   V(F64Mod, 0xca, d_dd)
 
+// TODO(titzer): sketch of asm-js compatibility bytecodes
+/* V(I32AsmjsDivS, 0xd0, i_ii)          \ */
+/* V(I32AsmjsDivU, 0xd1, i_ii)          \ */
+/* V(I32AsmjsRemS, 0xd2, i_ii)          \ */
+/* V(I32AsmjsRemU, 0xd3, i_ii)          \ */
+/* V(I32AsmjsLoad8S, 0xd4, i_i)         \ */
+/* V(I32AsmjsLoad8U, 0xd5, i_i)         \ */
+/* V(I32AsmjsLoad16S, 0xd6, i_i)        \ */
+/* V(I32AsmjsLoad16U, 0xd7, i_i)        \ */
+/* V(I32AsmjsLoad, 0xd8, i_i)           \ */
+/* V(F32AsmjsLoad, 0xd9, f_i)           \ */
+/* V(F64AsmjsLoad, 0xda, d_i)           \ */
+/* V(I32AsmjsStore8, 0xdb, i_i)         \ */
+/* V(I32AsmjsStore16, 0xdc, i_i)        \ */
+/* V(I32AsmjsStore, 0xdd, i_ii)         \ */
+/* V(F32AsmjsStore, 0xde, i_if)         \ */
+/* V(F64AsmjsStore, 0xdf, i_id)         \ */
+/* V(I32SAsmjsConvertF32, 0xe0, i_f)    \ */
+/* V(I32UAsmjsConvertF32, 0xe1, i_f)    \ */
+/* V(I32SAsmjsConvertF64, 0xe2, i_d)    \ */
+/* V(I32SAsmjsConvertF64, 0xe3, i_d) */
+
 // All opcodes.
 #define FOREACH_OPCODE(V)     \
   FOREACH_CONTROL_OPCODE(V)   \
   FOREACH_MISC_OPCODE(V)      \
   FOREACH_SIMPLE_OPCODE(V)    \
   FOREACH_STORE_MEM_OPCODE(V) \
   FOREACH_LOAD_MEM_OPCODE(V)  \
   FOREACH_MISC_MEM_OPCODE(V)  \
   FOREACH_ASMJS_COMPAT_OPCODE(V)
 
@@ skipping 199 matching lines @@
       default:
         return "<unknown>";
     }
   }
 };
 }  // namespace wasm
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_WASM_OPCODES_H_