[refactor] Separate generated builtins and C++ builtins into separate files

src/builtins/builtins-math.cc

 // Copyright 2016 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "src/builtins/builtins-utils.h"
 #include "src/builtins/builtins.h"
-#include "src/code-factory.h"
-#include "src/code-stub-assembler.h"
 #include "src/counters.h"
 #include "src/objects-inl.h"
 
 namespace v8 {
 namespace internal {
 
 // -----------------------------------------------------------------------------
 // ES6 section 20.2.2 Function Properties of the Math Object
 
-class MathBuiltinsAssembler : public CodeStubAssembler {
- public:
-  explicit MathBuiltinsAssembler(compiler::CodeAssemblerState* state)
-      : CodeStubAssembler(state) {}
-
- protected:
-  void MathRoundingOperation(Node* (CodeStubAssembler::*float64op)(Node*));
-  void MathUnaryOperation(Node* (CodeStubAssembler::*float64op)(Node*));
-  void MathMaxMin(Node* (CodeStubAssembler::*float64op)(Node*, Node*),
-                  double default_val);
-};
-
-// ES6 section - 20.2.2.1 Math.abs ( x )
-TF_BUILTIN(MathAbs, CodeStubAssembler) {
-  Node* context = Parameter(4);
-
-  // We might need to loop once for ToNumber conversion.
-  Variable var_x(this, MachineRepresentation::kTagged);
-  Label loop(this, &var_x);
-  var_x.Bind(Parameter(1));
-  Goto(&loop);
-  Bind(&loop);
-  {
-    // Load the current {x} value.
-    Node* x = var_x.value();
-
-    // Check if {x} is a Smi or a HeapObject.
-    Label if_xissmi(this), if_xisnotsmi(this);
-    Branch(TaggedIsSmi(x), &if_xissmi, &if_xisnotsmi);
-
-    Bind(&if_xissmi);
-    {
-      // Check if {x} is already positive.
-      Label if_xispositive(this), if_xisnotpositive(this);
-      BranchIfSmiLessThanOrEqual(SmiConstant(Smi::FromInt(0)), x,
-                                 &if_xispositive, &if_xisnotpositive);
-
-      Bind(&if_xispositive);
-      {
-        // Just return the input {x}.
-        Return(x);
-      }
-
-      Bind(&if_xisnotpositive);
-      {
-        // Try to negate the {x} value.
-        Node* pair =
-            IntPtrSubWithOverflow(IntPtrConstant(0), BitcastTaggedToWord(x));
-        Node* overflow = Projection(1, pair);
-        Label if_overflow(this, Label::kDeferred), if_notoverflow(this);
-        Branch(overflow, &if_overflow, &if_notoverflow);
-
-        Bind(&if_notoverflow);
-        {
-          // There is a Smi representation for negated {x}.
-          Node* result = Projection(0, pair);
-          Return(BitcastWordToTagged(result));
-        }
-
-        Bind(&if_overflow);
-        { Return(NumberConstant(0.0 - Smi::kMinValue)); }
-      }
-    }
-
-    Bind(&if_xisnotsmi);
-    {
-      // Check if {x} is a HeapNumber.
-      Label if_xisheapnumber(this), if_xisnotheapnumber(this, Label::kDeferred);
-      Branch(IsHeapNumberMap(LoadMap(x)), &if_xisheapnumber,
-             &if_xisnotheapnumber);
-
-      Bind(&if_xisheapnumber);
-      {
-        Node* x_value = LoadHeapNumberValue(x);
-        Node* value = Float64Abs(x_value);
-        Node* result = AllocateHeapNumberWithValue(value);
-        Return(result);
-      }
-
-      Bind(&if_xisnotheapnumber);
-      {
-        // Need to convert {x} to a Number first.
-        Callable callable = CodeFactory::NonNumberToNumber(isolate());
-        var_x.Bind(CallStub(callable, context, x));
-        Goto(&loop);
-      }
-    }
-  }
-}
-
-void MathBuiltinsAssembler::MathRoundingOperation(
-    Node* (CodeStubAssembler::*float64op)(Node*)) {
-  Node* context = Parameter(4);
-
-  // We might need to loop once for ToNumber conversion.
-  Variable var_x(this, MachineRepresentation::kTagged);
-  Label loop(this, &var_x);
-  var_x.Bind(Parameter(1));
-  Goto(&loop);
-  Bind(&loop);
-  {
-    // Load the current {x} value.
-    Node* x = var_x.value();
-
-    // Check if {x} is a Smi or a HeapObject.
-    Label if_xissmi(this), if_xisnotsmi(this);
-    Branch(TaggedIsSmi(x), &if_xissmi, &if_xisnotsmi);
-
-    Bind(&if_xissmi);
-    {
-      // Nothing to do when {x} is a Smi.
-      Return(x);
-    }
-
-    Bind(&if_xisnotsmi);
-    {
-      // Check if {x} is a HeapNumber.
-      Label if_xisheapnumber(this), if_xisnotheapnumber(this, Label::kDeferred);
-      Branch(IsHeapNumberMap(LoadMap(x)), &if_xisheapnumber,
-             &if_xisnotheapnumber);
-
-      Bind(&if_xisheapnumber);
-      {
-        Node* x_value = LoadHeapNumberValue(x);
-        Node* value = (this->*float64op)(x_value);
-        Node* result = ChangeFloat64ToTagged(value);
-        Return(result);
-      }
-
-      Bind(&if_xisnotheapnumber);
-      {
-        // Need to convert {x} to a Number first.
-        Callable callable = CodeFactory::NonNumberToNumber(isolate());
-        var_x.Bind(CallStub(callable, context, x));
-        Goto(&loop);
-      }
-    }
-  }
-}
-
-void MathBuiltinsAssembler::MathUnaryOperation(
-    Node* (CodeStubAssembler::*float64op)(Node*)) {
-  Node* x = Parameter(1);
-  Node* context = Parameter(4);
-  Node* x_value = TruncateTaggedToFloat64(context, x);
-  Node* value = (this->*float64op)(x_value);
-  Node* result = AllocateHeapNumberWithValue(value);
-  Return(result);
-}
-
-void MathBuiltinsAssembler::MathMaxMin(
-    Node* (CodeStubAssembler::*float64op)(Node*, Node*), double default_val) {
-  Node* argc = Parameter(BuiltinDescriptor::kArgumentsCount);
-  Node* context = Parameter(BuiltinDescriptor::kContext);
-
-  CodeStubArguments arguments(this, ChangeInt32ToIntPtr(argc));
-  argc = arguments.GetLength();
-
-  Variable result(this, MachineRepresentation::kFloat64);
-  result.Bind(Float64Constant(default_val));
-
-  CodeStubAssembler::VariableList vars({&result}, zone());
-  arguments.ForEach(vars, [this, float64op, context, &result](Node* arg) {
-    Node* float_value = TruncateTaggedToFloat64(context, arg);
-    result.Bind((this->*float64op)(result.value(), float_value));
-  });
-
-  arguments.PopAndReturn(ChangeFloat64ToTagged(result.value()));
-}
-
-// ES6 section 20.2.2.2 Math.acos ( x )
-TF_BUILTIN(MathAcos, MathBuiltinsAssembler) {
-  MathUnaryOperation(&CodeStubAssembler::Float64Acos);
-}
-
-// ES6 section 20.2.2.3 Math.acosh ( x )
-TF_BUILTIN(MathAcosh, MathBuiltinsAssembler) {
-  MathUnaryOperation(&CodeStubAssembler::Float64Acosh);
-}
-
-// ES6 section 20.2.2.4 Math.asin ( x )
-TF_BUILTIN(MathAsin, MathBuiltinsAssembler) {
-  MathUnaryOperation(&CodeStubAssembler::Float64Asin);
-}
-
-// ES6 section 20.2.2.5 Math.asinh ( x )
-TF_BUILTIN(MathAsinh, MathBuiltinsAssembler) {
-  MathUnaryOperation(&CodeStubAssembler::Float64Asinh);
-}
-// ES6 section 20.2.2.6 Math.atan ( x )
-TF_BUILTIN(MathAtan, MathBuiltinsAssembler) {
-  MathUnaryOperation(&CodeStubAssembler::Float64Atan);
-}
-
-// ES6 section 20.2.2.7 Math.atanh ( x )
-TF_BUILTIN(MathAtanh, MathBuiltinsAssembler) {
-  MathUnaryOperation(&CodeStubAssembler::Float64Atanh);
-}
-
-// ES6 section 20.2.2.8 Math.atan2 ( y, x )
-TF_BUILTIN(MathAtan2, CodeStubAssembler) {
-  Node* y = Parameter(1);
-  Node* x = Parameter(2);
-  Node* context = Parameter(5);
-
-  Node* y_value = TruncateTaggedToFloat64(context, y);
-  Node* x_value = TruncateTaggedToFloat64(context, x);
-  Node* value = Float64Atan2(y_value, x_value);
-  Node* result = AllocateHeapNumberWithValue(value);
-  Return(result);
-}
-
-// ES6 section 20.2.2.10 Math.ceil ( x )
-TF_BUILTIN(MathCeil, MathBuiltinsAssembler) {
-  MathRoundingOperation(&CodeStubAssembler::Float64Ceil);
-}
-
-// ES6 section 20.2.2.9 Math.cbrt ( x )
-TF_BUILTIN(MathCbrt, MathBuiltinsAssembler) {
-  MathUnaryOperation(&CodeStubAssembler::Float64Cbrt);
-}
-
-// ES6 section 20.2.2.11 Math.clz32 ( x )
-TF_BUILTIN(MathClz32, CodeStubAssembler) {
-  Node* context = Parameter(4);
-
-  // Shared entry point for the clz32 operation.
-  Variable var_clz32_x(this, MachineRepresentation::kWord32);
-  Label do_clz32(this);
-
-  // We might need to loop once for ToNumber conversion.
-  Variable var_x(this, MachineRepresentation::kTagged);
-  Label loop(this, &var_x);
-  var_x.Bind(Parameter(1));
-  Goto(&loop);
-  Bind(&loop);
-  {
-    // Load the current {x} value.
-    Node* x = var_x.value();
-
-    // Check if {x} is a Smi or a HeapObject.
-    Label if_xissmi(this), if_xisnotsmi(this);
-    Branch(TaggedIsSmi(x), &if_xissmi, &if_xisnotsmi);
-
-    Bind(&if_xissmi);
-    {
-      var_clz32_x.Bind(SmiToWord32(x));
-      Goto(&do_clz32);
-    }
-
-    Bind(&if_xisnotsmi);
-    {
-      // Check if {x} is a HeapNumber.
-      Label if_xisheapnumber(this), if_xisnotheapnumber(this, Label::kDeferred);
-      Branch(IsHeapNumberMap(LoadMap(x)), &if_xisheapnumber,
-             &if_xisnotheapnumber);
-
-      Bind(&if_xisheapnumber);
-      {
-        var_clz32_x.Bind(TruncateHeapNumberValueToWord32(x));
-        Goto(&do_clz32);
-      }
-
-      Bind(&if_xisnotheapnumber);
-      {
-        // Need to convert {x} to a Number first.
-        Callable callable = CodeFactory::NonNumberToNumber(isolate());
-        var_x.Bind(CallStub(callable, context, x));
-        Goto(&loop);
-      }
-    }
-  }
-
-  Bind(&do_clz32);
-  {
-    Node* x_value = var_clz32_x.value();
-    Node* value = Word32Clz(x_value);
-    Node* result = ChangeInt32ToTagged(value);
-    Return(result);
-  }
-}
-
-// ES6 section 20.2.2.12 Math.cos ( x )
-TF_BUILTIN(MathCos, MathBuiltinsAssembler) {
-  MathUnaryOperation(&CodeStubAssembler::Float64Cos);
-}
-
-// ES6 section 20.2.2.13 Math.cosh ( x )
-TF_BUILTIN(MathCosh, MathBuiltinsAssembler) {
-  MathUnaryOperation(&CodeStubAssembler::Float64Cosh);
-}
-
-// ES6 section 20.2.2.14 Math.exp ( x )
-TF_BUILTIN(MathExp, MathBuiltinsAssembler) {
-  MathUnaryOperation(&CodeStubAssembler::Float64Exp);
-}
-
-// ES6 section 20.2.2.15 Math.expm1 ( x )
-TF_BUILTIN(MathExpm1, MathBuiltinsAssembler) {
-  MathUnaryOperation(&CodeStubAssembler::Float64Expm1);
-}
-
-// ES6 section 20.2.2.16 Math.floor ( x )
-TF_BUILTIN(MathFloor, MathBuiltinsAssembler) {
-  MathRoundingOperation(&CodeStubAssembler::Float64Floor);
-}
-
-// ES6 section 20.2.2.17 Math.fround ( x )
-TF_BUILTIN(MathFround, CodeStubAssembler) {
-  Node* x = Parameter(1);
-  Node* context = Parameter(4);
-  Node* x_value = TruncateTaggedToFloat64(context, x);
-  Node* value32 = TruncateFloat64ToFloat32(x_value);
-  Node* value = ChangeFloat32ToFloat64(value32);
-  Node* result = AllocateHeapNumberWithValue(value);
-  Return(result);
-}
-
 // ES6 section 20.2.2.18 Math.hypot ( value1, value2, ...values )
 BUILTIN(MathHypot) {
   HandleScope scope(isolate);
   int const length = args.length() - 1;
   if (length == 0) return Smi::kZero;
   DCHECK_LT(0, length);
   double max = 0;
   bool one_arg_is_nan = false;
   List<double> abs_values(length);
   for (int i = 0; i < length; i++) {
@@ skipping 32 matching lines @@
     double n = abs_values.at(i) / max;
     double summand = n * n - compensation;
     double preliminary = sum + summand;
     compensation = (preliminary - sum) - summand;
     sum = preliminary;
   }
 
   return *isolate->factory()->NewNumber(std::sqrt(sum) * max);
 }
 
-// ES6 section 20.2.2.19 Math.imul ( x, y )
-TF_BUILTIN(MathImul, CodeStubAssembler) {
-  Node* x = Parameter(1);
-  Node* y = Parameter(2);
-  Node* context = Parameter(5);
-  Node* x_value = TruncateTaggedToWord32(context, x);
-  Node* y_value = TruncateTaggedToWord32(context, y);
-  Node* value = Int32Mul(x_value, y_value);
-  Node* result = ChangeInt32ToTagged(value);
-  Return(result);
-}
-
-// ES6 section 20.2.2.20 Math.log ( x )
-TF_BUILTIN(MathLog, MathBuiltinsAssembler) {
-  MathUnaryOperation(&CodeStubAssembler::Float64Log);
-}
-
-// ES6 section 20.2.2.21 Math.log1p ( x )
-TF_BUILTIN(MathLog1p, MathBuiltinsAssembler) {
-  MathUnaryOperation(&CodeStubAssembler::Float64Log1p);
-}
-
-// ES6 section 20.2.2.22 Math.log10 ( x )
-TF_BUILTIN(MathLog10, MathBuiltinsAssembler) {
-  MathUnaryOperation(&CodeStubAssembler::Float64Log10);
-}
-
-// ES6 section 20.2.2.23 Math.log2 ( x )
-TF_BUILTIN(MathLog2, MathBuiltinsAssembler) {
-  MathUnaryOperation(&CodeStubAssembler::Float64Log2);
-}
-
-// ES6 section 20.2.2.26 Math.pow ( x, y )
-TF_BUILTIN(MathPow, CodeStubAssembler) {
-  Node* x = Parameter(1);
-  Node* y = Parameter(2);
-  Node* context = Parameter(5);
-  Node* x_value = TruncateTaggedToFloat64(context, x);
-  Node* y_value = TruncateTaggedToFloat64(context, y);
-  Node* value = Float64Pow(x_value, y_value);
-  Node* result = ChangeFloat64ToTagged(value);
-  Return(result);
-}
-
-// ES6 section 20.2.2.27 Math.random ( )
-TF_BUILTIN(MathRandom, CodeStubAssembler) {
-  Node* context = Parameter(3);
-  Node* native_context = LoadNativeContext(context);
-
-  // Load cache index.
-  Variable smi_index(this, MachineRepresentation::kTagged);
-  smi_index.Bind(
-      LoadContextElement(native_context, Context::MATH_RANDOM_INDEX_INDEX));
-
-  // Cached random numbers are exhausted if index is 0. Go to slow path.
-  Label if_cached(this);
-  GotoIf(SmiAbove(smi_index.value(), SmiConstant(Smi::kZero)), &if_cached);
-
-  // Cache exhausted, populate the cache. Return value is the new index.
-  smi_index.Bind(CallRuntime(Runtime::kGenerateRandomNumbers, context));
-  Goto(&if_cached);
-
-  // Compute next index by decrement.
-  Bind(&if_cached);
-  Node* new_smi_index = SmiSub(smi_index.value(), SmiConstant(Smi::FromInt(1)));
-  StoreContextElement(native_context, Context::MATH_RANDOM_INDEX_INDEX,
-                      new_smi_index);
-
-  // Load and return next cached random number.
-  Node* array =
-      LoadContextElement(native_context, Context::MATH_RANDOM_CACHE_INDEX);
-  Node* random = LoadFixedDoubleArrayElement(
-      array, new_smi_index, MachineType::Float64(), 0, SMI_PARAMETERS);
-  Return(AllocateHeapNumberWithValue(random));
-}
-
-// ES6 section 20.2.2.28 Math.round ( x )
-TF_BUILTIN(MathRound, MathBuiltinsAssembler) {
-  MathRoundingOperation(&CodeStubAssembler::Float64Round);
-}
-
-// ES6 section 20.2.2.29 Math.sign ( x )
-TF_BUILTIN(MathSign, CodeStubAssembler) {
-  // Convert the {x} value to a Number.
-  Node* x = Parameter(1);
-  Node* context = Parameter(4);
-  Node* x_value = TruncateTaggedToFloat64(context, x);
-
-  // Return -1 if {x} is negative, 1 if {x} is positive, or {x} itself.
-  Label if_xisnegative(this), if_xispositive(this);
-  GotoIf(Float64LessThan(x_value, Float64Constant(0.0)), &if_xisnegative);
-  GotoIf(Float64LessThan(Float64Constant(0.0), x_value), &if_xispositive);
-  Return(ChangeFloat64ToTagged(x_value));
-
-  Bind(&if_xisnegative);
-  Return(SmiConstant(Smi::FromInt(-1)));
-
-  Bind(&if_xispositive);
-  Return(SmiConstant(Smi::FromInt(1)));
-}
-
-// ES6 section 20.2.2.30 Math.sin ( x )
-TF_BUILTIN(MathSin, MathBuiltinsAssembler) {
-  MathUnaryOperation(&CodeStubAssembler::Float64Sin);
-}
-
-// ES6 section 20.2.2.31 Math.sinh ( x )
-TF_BUILTIN(MathSinh, MathBuiltinsAssembler) {
-  MathUnaryOperation(&CodeStubAssembler::Float64Sinh);
-}
-
-// ES6 section 20.2.2.32 Math.sqrt ( x )
-TF_BUILTIN(MathSqrt, MathBuiltinsAssembler) {
-  MathUnaryOperation(&CodeStubAssembler::Float64Sqrt);
-}
-
-// ES6 section 20.2.2.33 Math.tan ( x )
-TF_BUILTIN(MathTan, MathBuiltinsAssembler) {
-  MathUnaryOperation(&CodeStubAssembler::Float64Tan);
-}
-
-// ES6 section 20.2.2.34 Math.tanh ( x )
-TF_BUILTIN(MathTanh, MathBuiltinsAssembler) {
-  MathUnaryOperation(&CodeStubAssembler::Float64Tanh);
-}
-
-// ES6 section 20.2.2.35 Math.trunc ( x )
-TF_BUILTIN(MathTrunc, MathBuiltinsAssembler) {
-  MathRoundingOperation(&CodeStubAssembler::Float64Trunc);
-}
-
-// ES6 section 20.2.2.24 Math.max ( value1, value2 , ...values )
-TF_BUILTIN(MathMax, MathBuiltinsAssembler) {
-  MathMaxMin(&CodeStubAssembler::Float64Max, -1.0 * V8_INFINITY);
-}
-
-// ES6 section 20.2.2.25 Math.min ( value1, value2 , ...values )
-TF_BUILTIN(MathMin, MathBuiltinsAssembler) {
-  MathMaxMin(&CodeStubAssembler::Float64Min, V8_INFINITY);
-}
-
 }  // namespace internal
 }  // namespace v8