ARM64: Generate optimized code for Math.floor and Math.round with double outputs.

src/arm64/lithium-arm64.h

 // Copyright 2013 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_ARM64_LITHIUM_ARM64_H_
 #define V8_ARM64_LITHIUM_ARM64_H_
 
 #include "hydrogen.h"
 #include "lithium-allocator.h"
 #include "lithium.h"
@@ skipping 97 matching lines @@
   V(LoadKeyedFixedDouble)                       \
   V(LoadKeyedGeneric)                           \
   V(LoadNamedField)                             \
   V(LoadNamedGeneric)                           \
   V(LoadRoot)                                   \
   V(MapEnumLength)                              \
   V(MathAbs)                                    \
   V(MathAbsTagged)                              \
   V(MathClz32)                                  \
   V(MathExp)                                    \
-  V(MathFloor)                                  \
+  V(MathFloorD)                                 \
+  V(MathFloorI)                                 \
   V(MathLog)                                    \
   V(MathMinMax)                                 \
   V(MathPowHalf)                                \
-  V(MathRound)                                  \
+  V(MathRoundD)                                 \
+  V(MathRoundI)                                 \
   V(MathSqrt)                                   \
   V(ModByConstI)                                \
   V(ModByPowerOf2I)                             \
   V(ModI)                                       \
   V(MulConstIS)                                 \
   V(MulI)                                       \
   V(MulS)                                       \
   V(NumberTagD)                                 \
   V(NumberTagU)                                 \
   V(NumberUntagD)                               \
@@ skipping 1767 matching lines @@
 
   LOperand* double_temp1() { return temps_[0]; }
   LOperand* temp1() { return temps_[1]; }
   LOperand* temp2() { return temps_[2]; }
   LOperand* temp3() { return temps_[3]; }
 
   DECLARE_CONCRETE_INSTRUCTION(MathExp, "math-exp")
 };
 
 
-class LMathFloor V8_FINAL : public LUnaryMathOperation<0> {
+// Math.floor with a double result.
+class LMathFloorD V8_FINAL : public LUnaryMathOperation<0> {
  public:
-  explicit LMathFloor(LOperand* value) : LUnaryMathOperation<0>(value) { }
-  DECLARE_CONCRETE_INSTRUCTION(MathFloor, "math-floor")
+  explicit LMathFloorD(LOperand* value) : LUnaryMathOperation<0>(value) { }
+  DECLARE_CONCRETE_INSTRUCTION(MathFloorD, "math-floor-d")
 };
 
 
+// Math.floor with an integer result.
+class LMathFloorI V8_FINAL : public LUnaryMathOperation<0> {
+ public:
+  explicit LMathFloorI(LOperand* value) : LUnaryMathOperation<0>(value) { }
+  DECLARE_CONCRETE_INSTRUCTION(MathFloorI, "math-floor-i")
+};
+
+
 class LFlooringDivByPowerOf2I V8_FINAL : public LTemplateInstruction<1, 1, 0> {
  public:
   LFlooringDivByPowerOf2I(LOperand* dividend, int32_t divisor) {
     inputs_[0] = dividend;
     divisor_ = divisor;
   }
 
   LOperand* dividend() { return inputs_[0]; }
   int32_t divisor() const { return divisor_; }
 
@@ skipping 72 matching lines @@
 };
 
 
 class LMathPowHalf V8_FINAL : public LUnaryMathOperation<0> {
  public:
   explicit LMathPowHalf(LOperand* value) : LUnaryMathOperation<0>(value) { }
   DECLARE_CONCRETE_INSTRUCTION(MathPowHalf, "math-pow-half")
 };
 
 
-class LMathRound V8_FINAL : public LUnaryMathOperation<1> {
+// Math.round with an integer result.
+class LMathRoundD V8_FINAL : public LUnaryMathOperation<0> {
  public:
-  LMathRound(LOperand* value, LOperand* temp1)
+  explicit LMathRoundD(LOperand* value)
+      : LUnaryMathOperation<0>(value) {
+  }
+
+  DECLARE_CONCRETE_INSTRUCTION(MathRoundD, "math-round-d")
+};
+
+
+// Math.round with an integer result.
+class LMathRoundI V8_FINAL : public LUnaryMathOperation<1> {
+ public:
+  LMathRoundI(LOperand* value, LOperand* temp1)
       : LUnaryMathOperation<1>(value) {
     temps_[0] = temp1;
   }
 
   LOperand* temp1() { return temps_[0]; }
 
-  DECLARE_CONCRETE_INSTRUCTION(MathRound, "math-round")
+  DECLARE_CONCRETE_INSTRUCTION(MathRoundI, "math-round-i")
 };
 
 
 class LMathSqrt V8_FINAL : public LUnaryMathOperation<0> {
  public:
   explicit LMathSqrt(LOperand* value) : LUnaryMathOperation<0>(value) { }
   DECLARE_CONCRETE_INSTRUCTION(MathSqrt, "math-sqrt")
 };
 
 
@@ skipping 1039 matching lines @@
 
   DISALLOW_COPY_AND_ASSIGN(LChunkBuilder);
 };
 
 #undef DECLARE_HYDROGEN_ACCESSOR
 #undef DECLARE_CONCRETE_INSTRUCTION
 
 } }  // namespace v8::internal
 
 #endif  // V8_ARM64_LITHIUM_ARM64_H_