S390: Optimize allocate sequence

src/s390/simulator-s390.cc

 // Copyright 2014 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 <stdarg.h>
 #include <stdlib.h>
 #include <cmath>
 
 #if V8_TARGET_ARCH_S390
 
@@ skipping 11134 matching lines @@
   return 0;
 }
 
 EVALUATE(CGH) {
   UNIMPLEMENTED();
   USE(instr);
   return 0;
 }
 
 EVALUATE(PFD) {
-  UNIMPLEMENTED();
+  DCHECK_OPCODE(PFD);
   USE(instr);
-  return 0;
+  return 6;
 }
 
 EVALUATE(STRV) {
   DCHECK_OPCODE(STRV);
   DECODE_RXY_A_INSTRUCTION(r1, x2, b2, d2);
   int32_t r1_val = get_low_register<int32_t>(r1);
   int64_t x2_val = (x2 == 0) ? 0 : get_register(x2);
   int64_t b2_val = (b2 == 0) ? 0 : get_register(b2);
   intptr_t mem_addr = b2_val + x2_val + d2;
   WriteW(mem_addr, ByteReverse(r1_val), instr);
@@ skipping 1601 matching lines @@
   return 0;
 }
 
 #undef EVALUATE
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // USE_SIMULATOR
 #endif  // V8_TARGET_ARCH_S390