if x.Op != OpRISCV64FLTD {
			break
		}
		v.copyOf(x)
		return true
	}
	// match: (MOVBUreg x:(FEQD _ _))
	// result: x
	for {
		x := v_0
		if x.Op != OpRISCV64FEQD {
			break
		}
		v.copyOf(x)
		return true
	}
	// match: (MOVBUreg x:(FNED _ _))
	// result: x
	for {
		x := v_0
		if x.Op != OpRISCV64FNED {
			break
		}
		v.copyOf(x)

	// The Copy method will do the right thing if copy returns nil
	// for some components of an AST but not others, so a good
	// copy function will only return non-nil for AST values that
	// need to change.
	// Copy itself returns either a copy or nil.
	Copy(copy func(AST) AST, skip func(AST) bool) AST

	// Implement the fmt.GoStringer interface.
	GoString() string
	goString(indent int, field string) string
}

  |   be done with a regex, but we need inter-field validation and rules which could be
  |   dealt with by something like drools.
  |
  | o i18n: would be good to be able to have names/descriptions/specifications
  |   in as many languages as possible. (see MNG-3626)
  |
  | o annotation mechanism so that changes to the model can be accurately tracked.
  |

		{name: "CMOVWCC", argLength: 3, reg: gp21, asm: "CMOVWCC", resultInArg0: true},
		{name: "CMOVWCS", argLength: 3, reg: gp21, asm: "CMOVWCS", resultInArg0: true},

		// CMOV with floating point instructions. We need separate pseudo-op to handle
		// InvertFlags correctly, and to generate special code that handles NaN (unordered flag).
		// NOTE: the fact that CMOV*EQF here is marked to generate CMOV*NE is not a bug. See

   * <p>Since this method uses {@code HashMap} instances internally, the keys of the supplied maps
   * must be well-behaved with respect to {@link Object#equals} and {@link Object#hashCode}.
   *
   * <p><b>Note:</b>If you only need to know whether two maps have the same mappings, call {@code
   * left.equals(right)} instead of this method.
   *
   * @param left the map to treat as the "left" map for purposes of comparison

   * <p>Since this method uses {@code HashMap} instances internally, the keys of the supplied maps
   * must be well-behaved with respect to {@link Object#equals} and {@link Object#hashCode}.
   *
   * <p><b>Note:</b>If you only need to know whether two maps have the same mappings, call {@code
   * left.equals(right)} instead of this method.
   *
   * @param left the map to treat as the "left" map for purposes of comparison

(Phi (Const32 [c]) (Const32 [c])) => (Const32 [c])
(Phi (Const64 [c]) (Const64 [c])) => (Const64 [c])

// slice and interface comparisons
// The frontend ensures that we can only compare against nil,
// so we need only compare the first word (interface type or slice ptr).
(EqInter x y)  => (EqPtr  (ITab x) (ITab y))
(NeqInter x y) => (NeqPtr (ITab x) (ITab y))
(EqSlice x y)  => (EqPtr  (SlicePtr x) (SlicePtr y))

   * Executor)} or to {@link #catchingAsync(Class, AsyncClosingFunction, Executor)} as long as it
   * meets these conditions:
   *
   * <ul>
   *   <li>It does not need to capture any {@link Closeable} objects by calling {@link
   *       DeferredCloser#eventuallyClose(Object, Executor)}.
   *   <li>It returns a {@link ListenableFuture}.
   * </ul>
   *
   * <p>Example usage:
   *

(Sqrt32 ...) => (FSQRTS ...)

(Min(64|32)F ...) => (FMIN(D|S) ...)
(Max(64|32)F ...) => (FMAX(D|S) ...)

// lowering rotates
// we do rotate detection in generic rules, if the following rules need to be changed, check generic rules first.
(RotateLeft8  <t> x (MOVDconst [c])) => (Or8 (Lsh8x64 <t> x (MOVDconst [c&7])) (Rsh8Ux64 <t> x (MOVDconst [-c&7])))