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

src/builtins/builtins-sharedarraybuffer.cc

Index: src/builtins/builtins-sharedarraybuffer.cc
diff --git a/src/builtins/builtins-sharedarraybuffer.cc b/src/builtins/builtins-sharedarraybuffer.cc
index 3c909a91e9d3bde61742a21581cf57072e05563a..4c0043471247002855f5191bc43314e3b642392f 100644
--- a/src/builtins/builtins-sharedarraybuffer.cc
+++ b/src/builtins/builtins-sharedarraybuffer.cc
@@ -8,7 +8,6 @@
 #include "src/builtins/builtins-utils.h"
 #include "src/builtins/builtins.h"
 #include "src/code-factory.h"
-#include "src/code-stub-assembler.h"
 #include "src/conversions-inl.h"
 #include "src/counters.h"
 #include "src/factory.h"
@@ -19,24 +18,6 @@
 namespace v8 {
 namespace internal {
 
-using compiler::Node;
-
-class SharedArrayBufferBuiltinsAssembler : public CodeStubAssembler {
- public:
-  explicit SharedArrayBufferBuiltinsAssembler(
-      compiler::CodeAssemblerState* state)
-      : CodeStubAssembler(state) {}
-
- protected:
-  void ValidateSharedTypedArray(Node* tagged, Node* context,
-                                Node** out_instance_type,
-                                Node** out_backing_store);
-  Node* ConvertTaggedAtomicIndexToWord32(Node* tagged, Node* context,
-                                         Node** number_index);
-  void ValidateAtomicIndex(Node* index_word, Node* array_length_word,
-                           Node* context);
-};
-
 // ES7 sharedmem 6.3.4.1 get SharedArrayBuffer.prototype.byteLength
 BUILTIN(SharedArrayBufferPrototypeGetByteLength) {
   HandleScope scope(isolate);
@@ -52,300 +33,6 @@ BUILTIN(SharedArrayBufferPrototypeGetByteLength) {
   return array_buffer->byte_length();
 }
 
-void SharedArrayBufferBuiltinsAssembler::ValidateSharedTypedArray(
-    Node* tagged, Node* context, Node** out_instance_type,
-    Node** out_backing_store) {
-  Label not_float_or_clamped(this), invalid(this);
-
-  // Fail if it is not a heap object.
-  GotoIf(TaggedIsSmi(tagged), &invalid);
-
-  // Fail if the array's instance type is not JSTypedArray.
-  GotoIf(Word32NotEqual(LoadInstanceType(tagged),
-                        Int32Constant(JS_TYPED_ARRAY_TYPE)),
-         &invalid);
-
-  // Fail if the array's JSArrayBuffer is not shared.
-  Node* array_buffer = LoadObjectField(tagged, JSTypedArray::kBufferOffset);
-  Node* bitfield = LoadObjectField(array_buffer, JSArrayBuffer::kBitFieldOffset,
-                                   MachineType::Uint32());
-  GotoIfNot(IsSetWord32<JSArrayBuffer::IsShared>(bitfield), &invalid);
-
-  // Fail if the array's element type is float32, float64 or clamped.
-  Node* elements_instance_type =
-      LoadInstanceType(LoadObjectField(tagged, JSObject::kElementsOffset));
-  STATIC_ASSERT(FIXED_INT8_ARRAY_TYPE < FIXED_FLOAT32_ARRAY_TYPE);
-  STATIC_ASSERT(FIXED_INT16_ARRAY_TYPE < FIXED_FLOAT32_ARRAY_TYPE);
-  STATIC_ASSERT(FIXED_INT32_ARRAY_TYPE < FIXED_FLOAT32_ARRAY_TYPE);
-  STATIC_ASSERT(FIXED_UINT8_ARRAY_TYPE < FIXED_FLOAT32_ARRAY_TYPE);
-  STATIC_ASSERT(FIXED_UINT16_ARRAY_TYPE < FIXED_FLOAT32_ARRAY_TYPE);
-  STATIC_ASSERT(FIXED_UINT32_ARRAY_TYPE < FIXED_FLOAT32_ARRAY_TYPE);
-  Branch(Int32LessThan(elements_instance_type,
-                       Int32Constant(FIXED_FLOAT32_ARRAY_TYPE)),
-         &not_float_or_clamped, &invalid);
-
-  Bind(&invalid);
-  {
-    CallRuntime(Runtime::kThrowNotIntegerSharedTypedArrayError, context,
-                tagged);
-    Unreachable();
-  }
-
-  Bind(&not_float_or_clamped);
-  *out_instance_type = elements_instance_type;
-
-  Node* backing_store =
-      LoadObjectField(array_buffer, JSArrayBuffer::kBackingStoreOffset);
-  Node* byte_offset = ChangeUint32ToWord(TruncateTaggedToWord32(
-      context, LoadObjectField(tagged, JSArrayBufferView::kByteOffsetOffset)));
-  *out_backing_store =
-      IntPtrAdd(BitcastTaggedToWord(backing_store), byte_offset);
-}
-
-// https://tc39.github.io/ecmascript_sharedmem/shmem.html#Atomics.ValidateAtomicAccess
-Node* SharedArrayBufferBuiltinsAssembler::ConvertTaggedAtomicIndexToWord32(
-    Node* tagged, Node* context, Node** number_index) {
-  Variable var_result(this, MachineRepresentation::kWord32);
-
-  // TODO(jkummerow): Skip ToNumber call when |tagged| is a number already.
-  // Maybe this can be unified with other tagged-to-index conversions?
-  // Why does this return an int32, and not an intptr?
-  // Why is there the additional |number_index| output parameter?
-  Callable to_number = CodeFactory::ToNumber(isolate());
-  *number_index = CallStub(to_number, context, tagged);
-  Label done(this, &var_result);
-
-  Label if_numberissmi(this), if_numberisnotsmi(this);
-  Branch(TaggedIsSmi(*number_index), &if_numberissmi, &if_numberisnotsmi);
-
-  Bind(&if_numberissmi);
-  {
-    var_result.Bind(SmiToWord32(*number_index));
-    Goto(&done);
-  }
-
-  Bind(&if_numberisnotsmi);
-  {
-    Node* number_index_value = LoadHeapNumberValue(*number_index);
-    Node* access_index = TruncateFloat64ToWord32(number_index_value);
-    Node* test_index = ChangeInt32ToFloat64(access_index);
-
-    Label if_indexesareequal(this), if_indexesarenotequal(this);
-    Branch(Float64Equal(number_index_value, test_index), &if_indexesareequal,
-           &if_indexesarenotequal);
-
-    Bind(&if_indexesareequal);
-    {
-      var_result.Bind(access_index);
-      Goto(&done);
-    }
-
-    Bind(&if_indexesarenotequal);
-    {
-      CallRuntime(Runtime::kThrowInvalidAtomicAccessIndexError, context);
-      Unreachable();
-    }
-  }
-
-  Bind(&done);
-  return var_result.value();
-}
-
-void SharedArrayBufferBuiltinsAssembler::ValidateAtomicIndex(
-    Node* index_word, Node* array_length_word, Node* context) {
-  // Check if the index is in bounds. If not, throw RangeError.
-  Label check_passed(this);
-  GotoIf(Uint32LessThan(index_word, array_length_word), &check_passed);
-
-  CallRuntime(Runtime::kThrowInvalidAtomicAccessIndexError, context);
-  Unreachable();
-
-  Bind(&check_passed);
-}
-
-TF_BUILTIN(AtomicsLoad, SharedArrayBufferBuiltinsAssembler) {
-  Node* array = Parameter(1);
-  Node* index = Parameter(2);
-  Node* context = Parameter(3 + 2);
-
-  Node* instance_type;
-  Node* backing_store;
-  ValidateSharedTypedArray(array, context, &instance_type, &backing_store);
-
-  Node* index_integer;
-  Node* index_word32 =
-      ConvertTaggedAtomicIndexToWord32(index, context, &index_integer);
-  Node* array_length_word32 = TruncateTaggedToWord32(
-      context, LoadObjectField(array, JSTypedArray::kLengthOffset));
-  ValidateAtomicIndex(index_word32, array_length_word32, context);
-  Node* index_word = ChangeUint32ToWord(index_word32);
-
-  Label i8(this), u8(this), i16(this), u16(this), i32(this), u32(this),
-      other(this);
-  int32_t case_values[] = {
-      FIXED_INT8_ARRAY_TYPE,   FIXED_UINT8_ARRAY_TYPE, FIXED_INT16_ARRAY_TYPE,
-      FIXED_UINT16_ARRAY_TYPE, FIXED_INT32_ARRAY_TYPE, FIXED_UINT32_ARRAY_TYPE,
-  };
-  Label* case_labels[] = {
-      &i8, &u8, &i16, &u16, &i32, &u32,
-  };
-  Switch(instance_type, &other, case_values, case_labels,
-         arraysize(case_labels));
-
-  Bind(&i8);
-  Return(SmiFromWord32(
-      AtomicLoad(MachineType::Int8(), backing_store, index_word)));
-
-  Bind(&u8);
-  Return(SmiFromWord32(
-      AtomicLoad(MachineType::Uint8(), backing_store, index_word)));
-
-  Bind(&i16);
-  Return(SmiFromWord32(
-      AtomicLoad(MachineType::Int16(), backing_store, WordShl(index_word, 1))));
-
-  Bind(&u16);
-  Return(SmiFromWord32(AtomicLoad(MachineType::Uint16(), backing_store,
-                                  WordShl(index_word, 1))));
-
-  Bind(&i32);
-  Return(ChangeInt32ToTagged(
-      AtomicLoad(MachineType::Int32(), backing_store, WordShl(index_word, 2))));
-
-  Bind(&u32);
-  Return(ChangeUint32ToTagged(AtomicLoad(MachineType::Uint32(), backing_store,
-                                         WordShl(index_word, 2))));
-
-  // This shouldn't happen, we've already validated the type.
-  Bind(&other);
-  Unreachable();
-}
-
-TF_BUILTIN(AtomicsStore, SharedArrayBufferBuiltinsAssembler) {
-  Node* array = Parameter(1);
-  Node* index = Parameter(2);
-  Node* value = Parameter(3);
-  Node* context = Parameter(4 + 2);
-
-  Node* instance_type;
-  Node* backing_store;
-  ValidateSharedTypedArray(array, context, &instance_type, &backing_store);
-
-  Node* index_integer;
-  Node* index_word32 =
-      ConvertTaggedAtomicIndexToWord32(index, context, &index_integer);
-  Node* array_length_word32 = TruncateTaggedToWord32(
-      context, LoadObjectField(array, JSTypedArray::kLengthOffset));
-  ValidateAtomicIndex(index_word32, array_length_word32, context);
-  Node* index_word = ChangeUint32ToWord(index_word32);
-
-  Node* value_integer = ToInteger(context, value);
-  Node* value_word32 = TruncateTaggedToWord32(context, value_integer);
-
-  Label u8(this), u16(this), u32(this), other(this);
-  int32_t case_values[] = {
-      FIXED_INT8_ARRAY_TYPE,   FIXED_UINT8_ARRAY_TYPE, FIXED_INT16_ARRAY_TYPE,
-      FIXED_UINT16_ARRAY_TYPE, FIXED_INT32_ARRAY_TYPE, FIXED_UINT32_ARRAY_TYPE,
-  };
-  Label* case_labels[] = {
-      &u8, &u8, &u16, &u16, &u32, &u32,
-  };
-  Switch(instance_type, &other, case_values, case_labels,
-         arraysize(case_labels));
-
-  Bind(&u8);
-  AtomicStore(MachineRepresentation::kWord8, backing_store, index_word,
-              value_word32);
-  Return(value_integer);
-
-  Bind(&u16);
-  AtomicStore(MachineRepresentation::kWord16, backing_store,
-              WordShl(index_word, 1), value_word32);
-  Return(value_integer);
-
-  Bind(&u32);
-  AtomicStore(MachineRepresentation::kWord32, backing_store,
-              WordShl(index_word, 2), value_word32);
-  Return(value_integer);
-
-  // This shouldn't happen, we've already validated the type.
-  Bind(&other);
-  Unreachable();
-}
-
-TF_BUILTIN(AtomicsExchange, SharedArrayBufferBuiltinsAssembler) {
-  Node* array = Parameter(1);
-  Node* index = Parameter(2);
-  Node* value = Parameter(3);
-  Node* context = Parameter(4 + 2);
-
-  Node* instance_type;
-  Node* backing_store;
-  ValidateSharedTypedArray(array, context, &instance_type, &backing_store);
-
-  Node* index_integer;
-  Node* index_word32 =
-      ConvertTaggedAtomicIndexToWord32(index, context, &index_integer);
-  Node* array_length_word32 = TruncateTaggedToWord32(
-      context, LoadObjectField(array, JSTypedArray::kLengthOffset));
-  ValidateAtomicIndex(index_word32, array_length_word32, context);
-
-  Node* value_integer = ToInteger(context, value);
-
-#if V8_TARGET_ARCH_MIPS || V8_TARGET_ARCH_MIPS64 || V8_TARGET_ARCH_PPC64 || \
-    V8_TARGET_ARCH_PPC
-  Return(CallRuntime(Runtime::kAtomicsExchange, context, array, index_integer,
-                     value_integer));
-#else
-  Node* index_word = ChangeUint32ToWord(index_word32);
-
-  Node* value_word32 = TruncateTaggedToWord32(context, value_integer);
-
-  Label i8(this), u8(this), i16(this), u16(this), i32(this), u32(this),
-      other(this);
-  int32_t case_values[] = {
-      FIXED_INT8_ARRAY_TYPE,   FIXED_UINT8_ARRAY_TYPE, FIXED_INT16_ARRAY_TYPE,
-      FIXED_UINT16_ARRAY_TYPE, FIXED_INT32_ARRAY_TYPE, FIXED_UINT32_ARRAY_TYPE,
-  };
-  Label* case_labels[] = {
-      &i8, &u8, &i16, &u16, &i32, &u32,
-  };
-  Switch(instance_type, &other, case_values, case_labels,
-         arraysize(case_labels));
-
-  Bind(&i8);
-  Return(SmiFromWord32(AtomicExchange(MachineType::Int8(), backing_store,
-                                      index_word, value_word32)));
-
-  Bind(&u8);
-  Return(SmiFromWord32(AtomicExchange(MachineType::Uint8(), backing_store,
-                                      index_word, value_word32)));
-
-  Bind(&i16);
-  Return(SmiFromWord32(AtomicExchange(MachineType::Int16(), backing_store,
-                                      WordShl(index_word, 1), value_word32)));
-
-  Bind(&u16);
-  Return(SmiFromWord32(AtomicExchange(MachineType::Uint16(), backing_store,
-                                      WordShl(index_word, 1), value_word32)));
-
-  Bind(&i32);
-  Return(ChangeInt32ToTagged(AtomicExchange(MachineType::Int32(), backing_store,
-                                            WordShl(index_word, 2),
-                                            value_word32)));
-
-  Bind(&u32);
-  Return(ChangeUint32ToTagged(
-      AtomicExchange(MachineType::Uint32(), backing_store,
-                     WordShl(index_word, 2), value_word32)));
-
-  // This shouldn't happen, we've already validated the type.
-  Bind(&other);
-  Unreachable();
-#endif  // V8_TARGET_ARCH_MIPS || V8_TARGET_ARCH_MIPS64 || V8_TARGET_ARCH_PPC64
-        // || V8_TARGET_ARCH_PPC || V8_TARGET_ARCH_S390 || V8_TARGET_ARCH_S390X
-}
-
 inline bool AtomicIsLockFree(uint32_t size) {
   return size == 1 || size == 2 || size == 4;
 }