MIPS: Improve Float(32|64)(Max|Min).

src/compiler/mips/code-generator-mips.cc

Index: src/compiler/mips/code-generator-mips.cc
diff --git a/src/compiler/mips/code-generator-mips.cc b/src/compiler/mips/code-generator-mips.cc
index 0a62b52d4fcada7058f05098b695340bf2dc063d..610df178d5f1bd8a6462c1b66941d8c0e0a88c85 100644
--- a/src/compiler/mips/code-generator-mips.cc
+++ b/src/compiler/mips/code-generator-mips.cc
@@ -270,6 +270,26 @@ class OutOfLineRecordWrite final : public OutOfLineCode {
   bool must_save_lr_;
 };
 
+#define CREATE_OOL_CLASS(ool_name, masm_ool_name, T)                 \
+  class ool_name final : public OutOfLineCode {                      \
+   public:                                                           \
+    ool_name(CodeGenerator* gen, T dst, T src1, T src2)              \
+        : OutOfLineCode(gen), dst_(dst), src1_(src1), src2_(src2) {} \
+                                                                     \
+    void Generate() final { __ masm_ool_name(dst_, src1_, src2_); }  \
+                                                                     \
+   private:                                                          \
+    T const dst_;                                                    \
+    T const src1_;                                                   \
+    T const src2_;                                                   \
+  }
+
+CREATE_OOL_CLASS(OutOfLineFloat32Max, Float32MaxOutOfLine, FPURegister);
+CREATE_OOL_CLASS(OutOfLineFloat32Min, Float32MinOutOfLine, FPURegister);
+CREATE_OOL_CLASS(OutOfLineFloat64Max, Float64MaxOutOfLine, DoubleRegister);
+CREATE_OOL_CLASS(OutOfLineFloat64Min, Float64MinOutOfLine, DoubleRegister);
+
+#undef CREATE_OOL_CLASS
 
 Condition FlagsConditionToConditionCmp(FlagsCondition condition) {
   switch (condition) {
@@ -1239,47 +1259,55 @@ CodeGenerator::CodeGenResult CodeGenerator::AssembleArchInstruction(
       break;
     }
     case kMipsFloat32Max: {
-      Label compare_nan, done_compare;
-      __ MaxNaNCheck_s(i.OutputSingleRegister(), i.InputSingleRegister(0),
-                       i.InputSingleRegister(1), &compare_nan);
-      __ Branch(&done_compare);
-      __ bind(&compare_nan);
-      __ Move(i.OutputSingleRegister(),
-              std::numeric_limits<float>::quiet_NaN());
-      __ bind(&done_compare);
+      FPURegister dst = i.OutputSingleRegister();
+      FPURegister src1 = i.InputSingleRegister(0);
+      FPURegister src2 = i.InputSingleRegister(1);
+      if (src1.is(src2)) {
+        __ Move_s(dst, src1);
+      } else {
+        auto ool = new (zone()) OutOfLineFloat32Max(this, dst, src1, src2);
+        __ Float32Max(dst, src1, src2, ool->entry());
+        __ bind(ool->exit());
+      }
       break;
     }
     case kMipsFloat64Max: {
-      Label compare_nan, done_compare;
-      __ MaxNaNCheck_d(i.OutputDoubleRegister(), i.InputDoubleRegister(0),
-                       i.InputDoubleRegister(1), &compare_nan);
-      __ Branch(&done_compare);
-      __ bind(&compare_nan);
-      __ Move(i.OutputDoubleRegister(),
-              std::numeric_limits<double>::quiet_NaN());
-      __ bind(&done_compare);
+      DoubleRegister dst = i.OutputDoubleRegister();
+      DoubleRegister src1 = i.InputDoubleRegister(0);
+      DoubleRegister src2 = i.InputDoubleRegister(1);
+      if (src1.is(src2)) {
+        __ Move_d(dst, src1);
+      } else {
+        auto ool = new (zone()) OutOfLineFloat64Max(this, dst, src1, src2);
+        __ Float64Max(dst, src1, src2, ool->entry());
+        __ bind(ool->exit());
+      }
       break;
     }
     case kMipsFloat32Min: {
-      Label compare_nan, done_compare;
-      __ MinNaNCheck_s(i.OutputSingleRegister(), i.InputSingleRegister(0),
-                       i.InputSingleRegister(1), &compare_nan);
-      __ Branch(&done_compare);
-      __ bind(&compare_nan);
-      __ Move(i.OutputSingleRegister(),
-              std::numeric_limits<float>::quiet_NaN());
-      __ bind(&done_compare);
+      FPURegister dst = i.OutputSingleRegister();
+      FPURegister src1 = i.InputSingleRegister(0);
+      FPURegister src2 = i.InputSingleRegister(1);
+      if (src1.is(src2)) {
+        __ Move_s(dst, src1);
+      } else {
+        auto ool = new (zone()) OutOfLineFloat32Min(this, dst, src1, src2);
+        __ Float32Min(dst, src1, src2, ool->entry());
+        __ bind(ool->exit());
+      }
       break;
     }
     case kMipsFloat64Min: {
-      Label compare_nan, done_compare;
-      __ MinNaNCheck_d(i.OutputDoubleRegister(), i.InputDoubleRegister(0),
-                       i.InputDoubleRegister(1), &compare_nan);
-      __ Branch(&done_compare);
-      __ bind(&compare_nan);
-      __ Move(i.OutputDoubleRegister(),
-              std::numeric_limits<double>::quiet_NaN());
-      __ bind(&done_compare);
+      DoubleRegister dst = i.OutputDoubleRegister();
+      DoubleRegister src1 = i.InputDoubleRegister(0);
+      DoubleRegister src2 = i.InputDoubleRegister(1);
+      if (src1.is(src2)) {
+        __ Move_d(dst, src1);
+      } else {
+        auto ool = new (zone()) OutOfLineFloat64Min(this, dst, src1, src2);
+        __ Float64Min(dst, src1, src2, ool->entry());
+        __ bind(ool->exit());
+      }
       break;
     }
     case kMipsCvtSD: {