[builtins] Introduce proper Float64Atan and Float64Atan2 operators.

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 1305 matching lines @@
 static void f64_asin_wrapper(double* param) {
   WriteDoubleValue(param, std::asin(ReadDoubleValue(param)));
 }
 
 ExternalReference ExternalReference::f64_asin_wrapper_function(
     Isolate* isolate) {
   return ExternalReference(Redirect(isolate, FUNCTION_ADDR(f64_asin_wrapper)));
 }
 
 static void f64_atan_wrapper(double* param) {
-  WriteDoubleValue(param, std::atan(ReadDoubleValue(param)));
+  WriteDoubleValue(param, base::ieee754::atan(ReadDoubleValue(param)));
 }
 
 ExternalReference ExternalReference::f64_atan_wrapper_function(
     Isolate* isolate) {
   return ExternalReference(Redirect(isolate, FUNCTION_ADDR(f64_atan_wrapper)));
 }
 
 static void f64_cos_wrapper(double* param) {
   WriteDoubleValue(param, std::cos(ReadDoubleValue(param)));
 }
@@ skipping 48 matching lines @@
   static const double kPiDividedBy4 = 0.78539816339744830962;
   if (std::isinf(x) && std::isinf(y)) {
     // Make sure that the result in case of two infinite arguments
     // is a multiple of Pi / 4. The sign of the result is determined
     // by the first argument (x) and the sign of the second argument
     // determines the multiplier: one or three.
     int multiplier = (x < 0) ? -1 : 1;
     if (y < 0) multiplier *= 3;
     WriteDoubleValue(param0, multiplier * kPiDividedBy4);
   } else {
-    WriteDoubleValue(param0, std::atan2(x, y));
+    WriteDoubleValue(param0, base::ieee754::atan2(x, y));
   }
 }
 
 ExternalReference ExternalReference::f64_atan2_wrapper_function(
     Isolate* isolate) {
   return ExternalReference(Redirect(isolate, FUNCTION_ADDR(f64_atan2_wrapper)));
 }
 
 static void f64_mod_wrapper(double* param0, double* param1) {
   WriteDoubleValue(param0,
@@ skipping 235 matching lines @@
       isolate->regexp_stack()->memory_address());
 }
 
 ExternalReference ExternalReference::address_of_regexp_stack_memory_size(
     Isolate* isolate) {
   return ExternalReference(isolate->regexp_stack()->memory_size_address());
 }
 
 #endif  // V8_INTERPRETED_REGEXP
 
+ExternalReference ExternalReference::ieee754_atan_function(Isolate* isolate) {
+  return ExternalReference(
+      Redirect(isolate, FUNCTION_ADDR(base::ieee754::atan), BUILTIN_FP_CALL));
+}
+
+ExternalReference ExternalReference::ieee754_atan2_function(Isolate* isolate) {
+  return ExternalReference(Redirect(
+      isolate, FUNCTION_ADDR(base::ieee754::atan2), BUILTIN_FP_FP_CALL));
+}
+
 ExternalReference ExternalReference::ieee754_log_function(Isolate* isolate) {
   return ExternalReference(
       Redirect(isolate, FUNCTION_ADDR(base::ieee754::log), BUILTIN_FP_CALL));
 }
 
 ExternalReference ExternalReference::ieee754_log1p_function(Isolate* isolate) {
   return ExternalReference(
       Redirect(isolate, FUNCTION_ADDR(base::ieee754::log1p), BUILTIN_FP_CALL));
 }
 
@@ skipping 456 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