2 files changed, 5 insertions, 6 deletions
diff --git a/deps/v8/src/base/utils/random-number-generator.cc b/deps/v8/src/base/utils/random-number-generator.cc
index afe5a1f098..a3313f4e88 100644
--- a/deps/v8/src/base/utils/random-number-generator.cc
+++ b/deps/v8/src/base/utils/random-number-generator.cc
@@ -99,7 +99,7 @@ int RandomNumberGenerator::NextInt(int max) {
 
 double RandomNumberGenerator::NextDouble() {
   XorShift128(&state0_, &state1_);
-  return ToDouble(state0_, state1_);
+  return ToDouble(state0_);
 }
 
 
diff --git a/deps/v8/src/base/utils/random-number-generator.h b/deps/v8/src/base/utils/random-number-generator.h
index b4b67970c7..45ec259305 100644
--- a/deps/v8/src/base/utils/random-number-generator.h
+++ b/deps/v8/src/base/utils/random-number-generator.h
@@ -108,11 +108,10 @@ class V8_BASE_EXPORT RandomNumberGenerator final {
   int64_t initial_seed() const { return initial_seed_; }
 
   // Static and exposed for external use.
-  static inline double ToDouble(uint64_t state0, uint64_t state1) {
+  static inline double ToDouble(uint64_t state0) {
     // Exponent for double values for [1.0 .. 2.0)
     static const uint64_t kExponentBits = uint64_t{0x3FF0000000000000};
-    static const uint64_t kMantissaMask = uint64_t{0x000FFFFFFFFFFFFF};
-    uint64_t random = ((state0 + state1) & kMantissaMask) | kExponentBits;
+    uint64_t random = (state0 >> 12) | kExponentBits;
     return bit_cast<double>(random) - 1;
   }
 
@@ -128,6 +127,8 @@ class V8_BASE_EXPORT RandomNumberGenerator final {
     *state1 = s1;
   }
 
+  static uint64_t MurmurHash3(uint64_t);
+
  private:
   static const int64_t kMultiplier = V8_2PART_UINT64_C(0x5, deece66d);
   static const int64_t kAddend = 0xb;
@@ -135,8 +136,6 @@ class V8_BASE_EXPORT RandomNumberGenerator final {
 
   int Next(int bits) V8_WARN_UNUSED_RESULT;
 
-  static uint64_t MurmurHash3(uint64_t);
-
   int64_t initial_seed_;
   uint64_t state0_;
   uint64_t state1_;