MIPS: Reland "Handle non-power-of-2 divisors in division-like operations".

src/mips/lithium-mips.h

 // Copyright 2012 the V8 project authors. 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.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 76 matching lines @@
   V(DeclareGlobals)                             \
   V(Deoptimize)                                 \
   V(DivI)                                       \
   V(DoubleToI)                                  \
   V(DoubleBits)                                 \
   V(DoubleToSmi)                                \
   V(Drop)                                       \
   V(Dummy)                                      \
   V(DummyUse)                                   \
   V(FlooringDivByConstI)                        \
+  V(FlooringDivByPowerOf2I)                     \
   V(ForInCacheArray)                            \
   V(ForInPrepareMap)                            \
   V(FunctionLiteral)                            \
   V(GetCachedArrayIndex)                        \
   V(Goto)                                       \
   V(HasCachedArrayIndexAndBranch)               \
   V(HasInstanceTypeAndBranch)                   \
   V(InnerAllocatedObject)                       \
   V(InstanceOf)                                 \
   V(InstanceOfKnownGlobal)                      \
@@ skipping 553 matching lines @@
   }
 
   LOperand* left() { return inputs_[0]; }
   LOperand* right() { return inputs_[1]; }
 
   DECLARE_CONCRETE_INSTRUCTION(DivI, "div-i")
   DECLARE_HYDROGEN_ACCESSOR(BinaryOperation)
 };
 
 
-class LFlooringDivByConstI V8_FINAL : public LTemplateInstruction<1, 2, 1> {
+class LFlooringDivByPowerOf2I V8_FINAL : public LTemplateInstruction<1, 1, 0> {
  public:
-  LFlooringDivByConstI(LOperand* dividend, LOperand* divisor, LOperand* temp) {
+  LFlooringDivByPowerOf2I(LOperand* dividend, int32_t divisor) {
     inputs_[0] = dividend;
-    inputs_[1] = divisor;
-    temps_[0] = temp;
+    divisor_ = divisor;
   }
 
   LOperand* dividend() { return inputs_[0]; }
-  LOperand* divisor() { return inputs_[1]; }
-  LOperand* temp() { return temps_[0]; }
+  int32_t divisor() { return divisor_; }
+
+  DECLARE_CONCRETE_INSTRUCTION(FlooringDivByPowerOf2I,
+                               "flooring-div-by-power-of-2-i")
+  DECLARE_HYDROGEN_ACCESSOR(MathFloorOfDiv)
+
+ private:
+  int32_t divisor_;
+};
+
+
+class LFlooringDivByConstI V8_FINAL : public LTemplateInstruction<1, 1, 0> {
+ public:
+  LFlooringDivByConstI(LOperand* dividend, int32_t divisor) {
+    inputs_[0] = dividend;
+    divisor_ = divisor;
+  }
+
+  LOperand* dividend() { return inputs_[0]; }
+  int32_t divisor() const { return divisor_; }
+  LOperand* temp1() { return temps_[0]; }
 
   DECLARE_CONCRETE_INSTRUCTION(FlooringDivByConstI, "flooring-div-by-const-i")
   DECLARE_HYDROGEN_ACCESSOR(MathFloorOfDiv)
+
+ private:
+  int32_t divisor_;
 };
 
 
 class LMathFloorOfDiv V8_FINAL : public LTemplateInstruction<1, 2, 1> {
  public:
   LMathFloorOfDiv(LOperand* left,
                   LOperand* right,
                   LOperand* temp = NULL) {
     inputs_[0] = left;
     inputs_[1] = right;
@@ skipping 1948 matching lines @@
   LInstruction* DoMathRound(HUnaryMathOperation* instr);
   LInstruction* DoMathAbs(HUnaryMathOperation* instr);
   LInstruction* DoMathLog(HUnaryMathOperation* instr);
   LInstruction* DoMathExp(HUnaryMathOperation* instr);
   LInstruction* DoMathSqrt(HUnaryMathOperation* instr);
   LInstruction* DoMathPowHalf(HUnaryMathOperation* instr);
   LInstruction* DoMathClz32(HUnaryMathOperation* instr);
   LInstruction* DoDivI(HBinaryOperation* instr);
   LInstruction* DoModByPowerOf2I(HMod* instr);
   LInstruction* DoModI(HMod* instr);
+  LInstruction* DoFlooringDivByPowerOf2I(HMathFloorOfDiv* instr);
   LInstruction* DoFlooringDivByConstI(HMathFloorOfDiv* instr);
 
  private:
   enum Status {
     UNUSED,
     BUILDING,
     DONE,
     ABORTED
   };
 
@@ skipping 104 matching lines @@
 
   DISALLOW_COPY_AND_ASSIGN(LChunkBuilder);
 };
 
 #undef DECLARE_HYDROGEN_ACCESSOR
 #undef DECLARE_CONCRETE_INSTRUCTION
 
 } }  // namespace v8::internal
 
 #endif  // V8_MIPS_LITHIUM_MIPS_H_