[wasm] Add I64Eqz operator.

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 157 matching lines @@
   V(I64LeS, 0x6b, i_ll)           \
   V(I64LtU, 0x6c, i_ll)           \
   V(I64LeU, 0x6d, i_ll)           \
   V(I64GtS, 0x6e, i_ll)           \
   V(I64GeS, 0x6f, i_ll)           \
   V(I64GtU, 0x70, i_ll)           \
   V(I64GeU, 0x71, i_ll)           \
   V(I64Clz, 0x72, l_l)            \
   V(I64Ctz, 0x73, l_l)            \
   V(I64Popcnt, 0x74, l_l)         \
+  V(I64Eqz, 0xba, i_l)            \
   V(F32Add, 0x75, f_ff)           \
   V(F32Sub, 0x76, f_ff)           \
   V(F32Mul, 0x77, f_ff)           \
   V(F32Div, 0x78, f_ff)           \
   V(F32Min, 0x79, f_ff)           \
   V(F32Max, 0x7a, f_ff)           \
   V(F32Abs, 0x7b, f_f)            \
   V(F32Neg, 0x7c, f_f)            \
   V(F32CopySign, 0x7d, f_ff)      \
   V(F32Ceil, 0x7e, f_f)           \
@@ skipping 283 matching lines @@
       default:
         return "<unknown>";
     }
   }
 };
 }  // namespace wasm
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_WASM_OPCODES_H_