[stubs] Introduce AddStub and SubtractStub.

src/compiler/code-stub-assembler.h

 // Copyright 2015 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.
 
 #ifndef V8_COMPILER_CODE_STUB_ASSEMBLER_H_
 #define V8_COMPILER_CODE_STUB_ASSEMBLER_H_
 
 #include <map>
 
 // Clients of this interface shouldn't depend on lots of compiler internals.
@@ skipping 45 matching lines @@
   V(UintPtrGreaterThanOrEqual)                        \
   V(WordEqual)                                        \
   V(WordNotEqual)                                     \
   V(Word32Equal)                                      \
   V(Word32NotEqual)                                   \
   V(Word64Equal)                                      \
   V(Word64NotEqual)
 
 #define CODE_STUB_ASSEMBLER_BINARY_OP_LIST(V)   \
   CODE_STUB_ASSEMBLER_COMPARE_BINARY_OP_LIST(V) \
+  V(Float64Add)                                 \
+  V(Float64Sub)                                 \
   V(IntPtrAdd)                                  \
+  V(IntPtrAddWithOverflow)                      \
   V(IntPtrSub)                                  \
+  V(IntPtrSubWithOverflow)                      \
   V(Int32Add)                                   \
   V(Int32Sub)                                   \
   V(Int32Mul)                                   \
   V(WordOr)                                     \
   V(WordAnd)                                    \
   V(WordXor)                                    \
   V(WordShl)                                    \
   V(WordShr)                                    \
   V(WordSar)                                    \
   V(WordRor)                                    \
@@ skipping 178 matching lines @@
   Node* SmiTag(Node* value);
   // Untag a Smi value as a Word.
   Node* SmiUntag(Node* value);
 
   // Smi conversions.
   Node* SmiToFloat64(Node* value);
   Node* SmiToInt32(Node* value);
 
   // Smi operations.
   Node* SmiAdd(Node* a, Node* b);
+  Node* SmiAddWithOverflow(Node* a, Node* b);
+  Node* SmiSub(Node* a, Node* b);
+  Node* SmiSubWithOverflow(Node* a, Node* b);
   Node* SmiEqual(Node* a, Node* b);
   Node* SmiLessThan(Node* a, Node* b);
   Node* SmiLessThanOrEqual(Node* a, Node* b);
   Node* SmiMin(Node* a, Node* b);
 
   // Load a value from the root array.
   Node* LoadRoot(Heap::RootListIndex root_index);
 
   // Check a value for smi-ness
   Node* WordIsSmi(Node* a);
@@ skipping 142 matching lines @@
   // Map of variables to the list of value nodes that have been added from each
   // merge path in their order of merging.
   std::map<Variable::Impl*, std::vector<Node*>> variable_merges_;
 };
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_COMPILER_CODE_STUB_ASSEMBLER_H_