Tweaks on Math.pow (ia32 and x64).

src/assembler.cc

 // Copyright (c) 2011 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 1097 matching lines @@
     m *= m;
     n >>= 2;
   }
   return p;
 }
 
 
 double power_double_double(double x, double y) {
   // The checks for special cases can be dropped in ia32 because it has already
   // been done in generated code before bailing out here.
-#if !defined(V8_TARGET_ARCH_IA32)
-  int y_int = static_cast<int>(y);
-  if (y == y_int) {
-    return power_double_int(x, y_int);  // Returns 1.0 for exponent 0.
-  }
-  if (!isinf(x)) {
-    if (y == 0.5) return sqrt(x + 0.0);  // -0 must be converted to +0.
-    if (y == -0.5) return 1.0 / sqrt(x + 0.0);
-  }
-#endif
-  if (isnan(y) || ((x == 1 || x == -1) && isinf(y))) {
-    return OS::nan_value();
-  }
+  if (isnan(y) || ((x == 1 || x == -1) && isinf(y))) return OS::nan_value();
   return pow(x, y);
 }
 
 
 ExternalReference ExternalReference::power_double_double_function(
     Isolate* isolate) {
   return ExternalReference(Redirect(isolate,
                                     FUNCTION_ADDR(power_double_double),
                                     BUILTIN_FP_FP_CALL));
 }
@@ skipping 124 matching lines @@
     assembler_->RecordRelocInfo(RelocInfo::POSITION, state_.current_position);
     state_.written_position = state_.current_position;
     written = true;
   }
 
   // Return whether something was written.
   return written;
 }
 
 } }  // namespace v8::internal