[wasm] Use the Float64Max/Min machine operators to implement F64Max/Min.

src/compiler/ia32/code-generator-ia32.cc

Index: src/compiler/ia32/code-generator-ia32.cc
diff --git a/src/compiler/ia32/code-generator-ia32.cc b/src/compiler/ia32/code-generator-ia32.cc
index 63be7f22084548d5be65d1d8ee9a11d0cf0681b2..88eda422edb297af7ad81ce3443553bcd5dcaf42 100644
--- a/src/compiler/ia32/code-generator-ia32.cc
+++ b/src/compiler/ia32/code-generator-ia32.cc
@@ -197,17 +197,33 @@ class OutOfLineLoadInteger final : public OutOfLineCode {
   Register const result_;
 };
 
-class OutOfLineLoadNaN final : public OutOfLineCode {
+class OutOfLineLoadFloat32NaN final : public OutOfLineCode {
  public:
-  OutOfLineLoadNaN(CodeGenerator* gen, XMMRegister result)
+  OutOfLineLoadFloat32NaN(CodeGenerator* gen, XMMRegister result)
       : OutOfLineCode(gen), result_(result) {}
 
-  void Generate() final { __ pcmpeqd(result_, result_); }
+  void Generate() final {
+    __ xorps(result_, result_);
+    __ divss(result_, result_);
+  }
 
  private:
   XMMRegister const result_;
 };
 
+class OutOfLineLoadFloat64NaN final : public OutOfLineCode {
+ public:
+  OutOfLineLoadFloat64NaN(CodeGenerator* gen, XMMRegister result)
+      : OutOfLineCode(gen), result_(result) {}
+
+  void Generate() final {
+    __ xorpd(result_, result_);
+    __ divsd(result_, result_);
+  }
+
+ private:
+  XMMRegister const result_;
+};
 
 class OutOfLineTruncateDoubleToI final : public OutOfLineCode {
  public:
@@ -270,7 +286,7 @@ class OutOfLineRecordWrite final : public OutOfLineCode {
 
 }  // namespace
 
-#define ASSEMBLE_CHECKED_LOAD_FLOAT(asm_instr)                        \
+#define ASSEMBLE_CHECKED_LOAD_FLOAT(asm_instr, OutOfLineLoadNaN)      \
   do {                                                                \
     auto result = i.OutputDoubleRegister();                           \
     auto offset = i.InputRegister(0);                                 \
@@ -1039,7 +1055,8 @@ CodeGenerator::CodeGenResult CodeGenerator::AssembleArchInstruction(
       } else {
         __ ucomisd(i.InputDoubleRegister(0), i.InputOperand(1));
       }
-      auto ool = new (zone()) OutOfLineLoadNaN(this, i.OutputDoubleRegister());
+      auto ool =
+          new (zone()) OutOfLineLoadFloat64NaN(this, i.OutputDoubleRegister());
       __ j(parity_even, ool->entry());
       __ j(above, &done_compare, Label::kNear);
       __ j(below, &compare_swap, Label::kNear);
@@ -1063,7 +1080,8 @@ CodeGenerator::CodeGenResult CodeGenerator::AssembleArchInstruction(
       } else {
         __ ucomisd(i.InputDoubleRegister(0), i.InputOperand(1));
       }
-      auto ool = new (zone()) OutOfLineLoadNaN(this, i.OutputDoubleRegister());
+      auto ool =
+          new (zone()) OutOfLineLoadFloat64NaN(this, i.OutputDoubleRegister());
       __ j(parity_even, ool->entry());
       __ j(below, &done_compare, Label::kNear);
       __ j(above, &compare_swap, Label::kNear);
@@ -1496,10 +1514,10 @@ CodeGenerator::CodeGenResult CodeGenerator::AssembleArchInstruction(
       ASSEMBLE_CHECKED_LOAD_INTEGER(mov);
       break;
     case kCheckedLoadFloat32:
-      ASSEMBLE_CHECKED_LOAD_FLOAT(movss);
+      ASSEMBLE_CHECKED_LOAD_FLOAT(movss, OutOfLineLoadFloat32NaN);
       break;
     case kCheckedLoadFloat64:
-      ASSEMBLE_CHECKED_LOAD_FLOAT(movsd);
+      ASSEMBLE_CHECKED_LOAD_FLOAT(movsd, OutOfLineLoadFloat64NaN);
       break;
     case kCheckedStoreWord8:
       ASSEMBLE_CHECKED_STORE_INTEGER(mov_b);