[turbofan] Cleanup for Float64Max and Float64Min.

This CL removes the optional operator flag of Float64Max and Float64Min.
Additionally it renames the instruction codes on x64 and ia32 because
the old instructions codes (e.g. SSEFloat64Max) do not match the
generated code anymore.

R=bmeurer@chromium.org

Review-Url: https://codereview.chromium.org/2237813002
Cr-Commit-Position: refs/heads/master@{#38674}

src/compiler/machine-operator.h

@@ -104,40 +104,35 @@ class MachineOperatorBuilder final : public ZoneObject {
   // for operations that are unsupported by some back-ends.
   enum Flag : unsigned {
     kNoFlags = 0u,
-    // Note that Float*Max behaves like `(b < a) ? a : b`, not like Math.max().
-    // Note that Float*Min behaves like `(a < b) ? a : b`, not like Math.min().
     kFloat32Max = 1u << 0,
     kFloat32Min = 1u << 1,
-    kFloat64Max = 1u << 2,
-    kFloat64Min = 1u << 3,
-    kFloat32RoundDown = 1u << 4,
-    kFloat64RoundDown = 1u << 5,
-    kFloat32RoundUp = 1u << 6,
-    kFloat64RoundUp = 1u << 7,
-    kFloat32RoundTruncate = 1u << 8,
-    kFloat64RoundTruncate = 1u << 9,
-    kFloat32RoundTiesEven = 1u << 10,
-    kFloat64RoundTiesEven = 1u << 11,
-    kFloat64RoundTiesAway = 1u << 12,
-    kInt32DivIsSafe = 1u << 13,
-    kUint32DivIsSafe = 1u << 14,
-    kWord32ShiftIsSafe = 1u << 15,
-    kWord32Ctz = 1u << 16,
-    kWord64Ctz = 1u << 17,
-    kWord32Popcnt = 1u << 18,
-    kWord64Popcnt = 1u << 19,
-    kWord32ReverseBits = 1u << 20,
-    kWord64ReverseBits = 1u << 21,
-    kWord32ReverseBytes = 1u << 22,
-    kWord64ReverseBytes = 1u << 23,
-    kAllOptionalOps = kFloat32Max | kFloat32Min | kFloat64Max | kFloat64Min |
-                      kFloat32RoundDown | kFloat64RoundDown | kFloat32RoundUp |
-                      kFloat64RoundUp | kFloat32RoundTruncate |
-                      kFloat64RoundTruncate | kFloat64RoundTiesAway |
-                      kFloat32RoundTiesEven | kFloat64RoundTiesEven |
-                      kWord32Ctz | kWord64Ctz | kWord32Popcnt | kWord64Popcnt |
-                      kWord32ReverseBits | kWord64ReverseBits |
-                      kWord32ReverseBytes | kWord64ReverseBytes
+    kFloat32RoundDown = 1u << 2,
+    kFloat64RoundDown = 1u << 3,
+    kFloat32RoundUp = 1u << 4,
+    kFloat64RoundUp = 1u << 5,
+    kFloat32RoundTruncate = 1u << 6,
+    kFloat64RoundTruncate = 1u << 7,
+    kFloat32RoundTiesEven = 1u << 8,
+    kFloat64RoundTiesEven = 1u << 9,
+    kFloat64RoundTiesAway = 1u << 10,
+    kInt32DivIsSafe = 1u << 11,
+    kUint32DivIsSafe = 1u << 12,
+    kWord32ShiftIsSafe = 1u << 13,
+    kWord32Ctz = 1u << 14,
+    kWord64Ctz = 1u << 15,
+    kWord32Popcnt = 1u << 16,
+    kWord64Popcnt = 1u << 17,
+    kWord32ReverseBits = 1u << 18,
+    kWord64ReverseBits = 1u << 19,
+    kWord32ReverseBytes = 1u << 20,
+    kWord64ReverseBytes = 1u << 21,
+    kAllOptionalOps =
+        kFloat32Max | kFloat32Min | kFloat32RoundDown | kFloat64RoundDown |
+        kFloat32RoundUp | kFloat64RoundUp | kFloat32RoundTruncate |
+        kFloat64RoundTruncate | kFloat64RoundTiesAway | kFloat32RoundTiesEven |
+        kFloat64RoundTiesEven | kWord32Ctz | kWord64Ctz | kWord32Popcnt |
+        kWord64Popcnt | kWord32ReverseBits | kWord64ReverseBits |
+        kWord32ReverseBytes | kWord64ReverseBytes
   };
   typedef base::Flags<Flag, unsigned> Flags;