VLUXEI8V	(X10), V2, V1, V3		// ERROR "invalid vector mask register"
	VSUXEI8V	V3, V2, V1, (X10)		// ERROR "invalid vector mask register"
	VLOXEI8V	(X10), V2, V1, V3		// ERROR "invalid vector mask register"
	VSOXEI8V	V3, V2, V1, (X10)		// ERROR "invalid vector mask register"
	VLSEG2E8V	(X10), V1, V3			// ERROR "invalid vector mask register"
	VLSEG2E8FFV	(X10), V1, V3			// ERROR "invalid vector mask register"

	// 31.11.15: Vector Integer Merge Instructions
	VMERGEVVM	V1, V2, V0, V3			// d781205c
	VMERGEVXM	X10, V2, V0, V3			// d741255c
	VMERGEVIM	$15, V2, V0, V3			// d7b1275c

	// 31.11.16: Vector Integer Move Instructions
	VMVVV		V2, V3				// d701015e
	VMVVX		X10, V3				// d741055e
	VMVVI		$15, V3				// d7b1075e

	// 31.12.1: Vector Single-Width Saturating Add and Subtract

		}
	}
	if opd, ok := riscv64SpecialOperand[name]; ok {
		return opd
	}
	return riscv.SPOP_END
}

// RISCV64ValidateVectorType reports whether the given configuration is a
// valid vector type.
func RISCV64ValidateVectorType(vsew, vlmul, vtail, vmask int64) error {
	_, err := riscv.EncodeVectorType(vsew, vlmul, vtail, vmask)
	return err

          .isAtMost(
              2
                  * constructionAsymptotics.applyAsDouble(largeSize)
                  / constructionAsymptotics.applyAsDouble(smallSize));
      // allow up to 2x wobble in the constant factors
    }
  }

  public void testResistsHashFloodingOnQuery() {
    CallsCounter smallCounter = new CallsCounter();
    List<CountsHashCodeAndEquals> haveSameHashesSmall = createAdversarialInput(10, smallCounter);