Documentation: fix comments for CommuteCondition.

src/arm64/constants-arm64.h

 // Copyright 2013 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef V8_ARM64_CONSTANTS_ARM64_H_
 #define V8_ARM64_CONSTANTS_ARM64_H_
 
 
 // Assert that this is an LP64 system.
 STATIC_ASSERT(sizeof(int) == sizeof(int32_t));     // NOLINT(runtime/sizeof)
@@ skipping 247 matching lines @@
   nv = 15  // Behaves as always/al.
 };
 
 inline Condition NegateCondition(Condition cond) {
   // Conditions al and nv behave identically, as "always true". They can't be
   // inverted, because there is no never condition.
   ASSERT((cond != al) && (cond != nv));
   return static_cast<Condition>(cond ^ 1);
 }
 
-// Commute a condition such that a cond b == b cond' b.
+// Commute a condition such that {a cond b == b cond' a}.
 inline Condition CommuteCondition(Condition cond) {
   switch (cond) {
     case lo:
       return hi;
     case hi:
       return lo;
     case hs:
       return ls;
     case ls:
       return hs;
@@ skipping 963 matching lines @@
 };
 
 enum UnallocatedOp {
   UnallocatedFixed = 0x00000000,
   UnallocatedFMask = 0x00000000
 };
 
 } }  // namespace v8::internal
 
 #endif  // V8_ARM64_CONSTANTS_ARM64_H_