[turbofan] Add Float32(Max|Min) machine operators.

src/x64/assembler-x64.h

Index: src/x64/assembler-x64.h
diff --git a/src/x64/assembler-x64.h b/src/x64/assembler-x64.h
index 12bd49c6ee62bbc7829931a0e8ae9783580c83f9..b2154fbaf4a61a7198481747f82b6f1a50ceae84 100644
--- a/src/x64/assembler-x64.h
+++ b/src/x64/assembler-x64.h
@@ -1566,6 +1566,10 @@ class Assembler : public AssemblerBase {
   void vmovupd(const Operand& dst, XMMRegister src) {
     vpd(0x11, src, xmm0, dst);
   }
+  void vmovmskps(Register dst, XMMRegister src) {
+    XMMRegister idst = {dst.code()};
+    vps(0x50, idst, xmm0, src);
+  }
   void vmovmskpd(Register dst, XMMRegister src) {
     XMMRegister idst = {dst.code()};
     vpd(0x50, idst, xmm0, src);