Lazily initialize fast_sqrt() and pass an Isolate parameter to it

src/assembler.cc

 // Copyright (c) 1994-2006 Sun Microsystems Inc.
 // All Rights Reserved.
 //
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 // - Redistributions of source code must retain the above copyright notice,
 // this list of conditions and the following disclaimer.
 //
@@ skipping 1451 matching lines @@
 }
 
 
 ExternalReference ExternalReference::runtime_function_table_address(
     Isolate* isolate) {
   return ExternalReference(
       const_cast<Runtime::Function*>(Runtime::RuntimeFunctionTable(isolate)));
 }
 
 
-double power_helper(double x, double y) {
+double power_helper(Isolate* isolate, double x, double y) {
   int y_int = static_cast<int>(y);
   if (y == y_int) {
     return power_double_int(x, y_int);  // Returns 1 if exponent is 0.
   }
   if (y == 0.5) {
+    lazily_initialize_fast_sqrt(isolate);
     return (std::isinf(x)) ? V8_INFINITY
-                           : fast_sqrt(x + 0.0);  // Convert -0 to +0.
+                           : fast_sqrt(x + 0.0, isolate);  // Convert -0 to +0.
   }
   if (y == -0.5) {
-    return (std::isinf(x)) ? 0 : 1.0 / fast_sqrt(x + 0.0);  // Convert -0 to +0.
+    lazily_initialize_fast_sqrt(isolate);
+    return (std::isinf(x)) ? 0 : 1.0 / fast_sqrt(x + 0.0,
+                                                 isolate);  // Convert -0 to +0.
   }
   return power_double_double(x, y);
 }
 
 
 // Helper function to compute x^y, where y is known to be an
 // integer. Uses binary decomposition to limit the number of
 // multiplications; see the discussion in "Hacker's Delight" by Henry
 // S. Warren, Jr., figure 11-6, page 213.
 double power_double_int(double x, int y) {
@@ skipping 409 matching lines @@
 
 
 void Assembler::DataAlign(int m) {
   DCHECK(m >= 2 && base::bits::IsPowerOfTwo32(m));
   while ((pc_offset() & (m - 1)) != 0) {
     db(0);
   }
 }
 }  // namespace internal
 }  // namespace v8