X87: [wasm] Use the Float64Max/Min machine operators to implement F64Max/Min.

src/crankshaft/x87/lithium-codegen-x87.cc

Index: src/crankshaft/x87/lithium-codegen-x87.cc
diff --git a/src/crankshaft/x87/lithium-codegen-x87.cc b/src/crankshaft/x87/lithium-codegen-x87.cc
index e7e99c5e739abc21c2417ea82f6bf9ce393fb390..7db1de6ff0916ade1456cef39189263b86395f76 100644
--- a/src/crankshaft/x87/lithium-codegen-x87.cc
+++ b/src/crankshaft/x87/lithium-codegen-x87.cc
@@ -4735,10 +4735,10 @@ void LCodeGen::EmitNumberUntagDNoSSE2(LNumberUntagD* instr, Register input_reg,
                    DeoptimizeReason::kNotAHeapNumberUndefined);
 
       __ bind(&convert);
-      __ push(Immediate(0xffffffff));
-      __ push(Immediate(0x7fffffff));
-      __ fld_d(MemOperand(esp, 0));
-      __ lea(esp, Operand(esp, kDoubleSize));
+      __ fldz();
+      __ fldz();
+      __ fdiv(1);
+      __ fstp(0);
       __ jmp(&done, Label::kNear);
 
       __ bind(&heap_number);