Convert SIMD wasm ops to runtime function calls

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 443 matching lines @@
   V(s_f, kAstS128, kAstF32)                        \
   V(f_si, kAstF32, kAstS128, kAstI32)              \
   V(s_sif, kAstS128, kAstS128, kAstI32, kAstF32)   \
   V(s_ss, kAstS128, kAstS128, kAstS128)            \
   V(s_sss, kAstS128, kAstS128, kAstS128, kAstS128) \
   V(s_i, kAstS128, kAstI32)                        \
   V(i_si, kAstI32, kAstS128, kAstI32)              \
   V(s_sii, kAstS128, kAstS128, kAstI32, kAstI32)   \
   V(s_si, kAstS128, kAstS128, kAstI32)
 
+#define FOREACH_PREFIX(V) V(Simd, 0xe5)
+
 enum WasmOpcode {
 // Declare expression opcodes.
 #define DECLARE_NAMED_ENUM(name, opcode, sig) kExpr##name = opcode,
   FOREACH_OPCODE(DECLARE_NAMED_ENUM)
 #undef DECLARE_NAMED_ENUM
+#define DECLARE_PREFIX(name, opcode) k##name##Prefix = opcode,
+      FOREACH_PREFIX(DECLARE_PREFIX)
+#undef DECLARE_PREFIX
 };
 
 // The reason for a trap.
 #define FOREACH_WASM_TRAPREASON(V) \
   V(TrapUnreachable)               \
   V(TrapMemOutOfBounds)            \
   V(TrapDivByZero)                 \
   V(TrapDivUnrepresentable)        \
   V(TrapRemByZero)                 \
   V(TrapFloatUnrepresentable)      \
@@ skipping 188 matching lines @@
       default:
         return "<unknown>";
     }
   }
 };
 }  // namespace wasm
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_WASM_OPCODES_H_