PPC: [turbofan] Implemented the TruncateFloat64ToUint64 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 2941 matching lines @@
       if (frb_val > kMaxLongLong) {
         frt_val = kMaxLongLong;
       } else if (frb_val < kMinLongLong) {
         frt_val = kMinLongLong;
       } else {
         frt_val = (int64_t)frb_val;
       }
       set_d_register(frt, frt_val);
       return;
     }
+    case FCTIDU: {
+      int frt = instr->RTValue();
+      int frb = instr->RBValue();
+      double frb_val = get_double_from_d_register(frb);
+      uint64_t frt_val;
+      uint64_t kMinLongLong = 0;
+      uint64_t kMaxLongLong = kMinLongLong - 1;
+
+      if (frb_val > kMaxLongLong) {
+        frt_val = kMaxLongLong;
+      } else if (frb_val < kMinLongLong) {
+        frt_val = kMinLongLong;
+      } else {
+        switch (fp_condition_reg_ & kFPRoundingModeMask) {
+          case kRoundToZero:
+            frt_val = (uint64_t)frb_val;
+            break;
+          case kRoundToPlusInf:
+            frt_val = (uint64_t)std::ceil(frb_val);
+            break;
+          case kRoundToMinusInf:
+            frt_val = (uint64_t)std::floor(frb_val);
+            break;
+          default:
+            frt_val = (uint64_t)frb_val;
+            UNIMPLEMENTED();  // Not used by V8.
+            break;
+        }
+      }
+      set_d_register(frt, frt_val);
+      return;
+    }
+    case FCTIDUZ: {
+      int frt = instr->RTValue();
+      int frb = instr->RBValue();
+      double frb_val = get_double_from_d_register(frb);
+      uint64_t frt_val;
+      uint64_t kMinLongLong = 0;
+      uint64_t kMaxLongLong = kMinLongLong - 1;
+
+      if (frb_val > kMaxLongLong) {
+        frt_val = kMaxLongLong;
+      } else if (frb_val < kMinLongLong) {
+        frt_val = kMinLongLong;
+      } else {
+        frt_val = (uint64_t)frb_val;
+      }
+      set_d_register(frt, frt_val);
+      return;
+    }
     case FCTIW:
     case FCTIWZ: {
       int frt = instr->RTValue();
       int frb = instr->RBValue();
       double frb_val = get_double_from_d_register(frb);
       int64_t frt_val;
       if (frb_val > kMaxInt) {
         frt_val = kMaxInt;
       } else if (frb_val < kMinInt) {
         frt_val = kMinInt;
@@ skipping 985 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