PPC64: Implemented the Word64Popcnt TurboFan operator.

src/ppc/simulator-ppc.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_PPC
 
@@ skipping 1845 matching lines @@
       uintptr_t count = 0;
       int n = 0;
       uintptr_t bit = 0x80000000;
       for (; n < 32; n++) {
         if (bit & rs_val) count++;
         bit >>= 1;
       }
       set_register(ra, count);
       break;
     }
+#if V8_TARGET_ARCH_PPC64
+    case POPCNTD: {
+      int rs = instr->RSValue();
+      int ra = instr->RAValue();
+      uintptr_t rs_val = get_register(rs);
+      uintptr_t count = 0;
+      int n = 0;
+      uintptr_t bit = 0x8000000000000000UL;
+      for (; n < 64; n++) {
+        if (bit & rs_val) count++;
+        bit >>= 1;
+      }
+      set_register(ra, count);
+      break;
+    }
+#endif
     case SYNC: {
       // todo - simulate sync
       break;
     }
     case ICBI: {
       // todo - simulate icbi
       break;
     }
     default: {
       found = false;
@@ skipping 2033 matching lines @@
   uintptr_t* stack_slot = reinterpret_cast<uintptr_t*>(current_sp);
   uintptr_t address = *stack_slot;
   set_register(sp, current_sp + sizeof(uintptr_t));
   return address;
 }
 }  // namespace internal
 }  // namespace v8
 
 #endif  // USE_SIMULATOR
 #endif  // V8_TARGET_ARCH_PPC