diff --git a/Source/JavaScriptCore/llint/LowLevelInterpreter.cpp b/Source/JavaScriptCore/llint/LowLevelInterpreter.cpp
index d3c73b0..186c659 100644
--- a/Source/JavaScriptCore/llint/LowLevelInterpreter.cpp
+++ b/Source/JavaScriptCore/llint/LowLevelInterpreter.cpp
@@ -117,6 +117,17 @@ static double Ints2Double(uint32_t lo, uint32_t hi)
     u.ival64 = (static_cast<uint64_t>(hi) << 32) | lo;
     return u.dval;
 }
+
+static void Double2Ints(double val, uint32_t& lo, uint32_t& hi)
+{
+    union {
+        double dval;
+        uint64_t ival64;
+    } u;
+    u.dval = val;
+    hi = static_cast<uint32_t>(u.ival64 >> 32);
+    lo = static_cast<uint32_t>(u.ival64);
+}
 #endif // USE(JSVALUE32_64)
 
 } // namespace LLint
diff --git a/Source/JavaScriptCore/offlineasm/cloop.rb b/Source/JavaScriptCore/offlineasm/cloop.rb
index 14cacb9..f6bd552 100644
--- a/Source/JavaScriptCore/offlineasm/cloop.rb
+++ b/Source/JavaScriptCore/offlineasm/cloop.rb
@@ -1025,7 +1025,7 @@ class Instruction
         # 32-bit instruction: f2dii dblOp int32LoOp int32HiOp (based on ARMv7)
         # Encode a 64-bit double into 2 32-bit ints (low and high).
         when "fd2ii"
-            $asm.putc "Double2Ints(#{operands[0].clValue(:double)}, #{operands[1].clValue}, #{operands[2].clValue});"
+            $asm.putc "Double2Ints(#{operands[0].clValue(:double)}, #{operands[1].clValue(:uint32)}, #{operands[2].clValue(:uint32)});"
 
         # 64-bit instruction: fq2d int64Op dblOp (based on X64)
         # Copy a bit-encoded double in a 64-bit int register to a double register.