* (Applicable also to display devices.)
   *
   * @since 8.0
   */
  public static final byte SP = 32;

  /**
   * Alternate name for {@link #SP}.
   *
   * @since 8.0
   */
  public static final byte SPACE = 32;

  /**
   * Delete: This character is used primarily to "erase" or "obliterate" erroneous or unwanted

	// "C" Extension for Compressed Instructions, Version 2.0
	//

	// 26.3.1: Compressed Stack-Pointer-Based Loads and Stores
	CLWSP	20(SP), X10				// 5245
	CLDSP	24(SP), X10				// 6265
	CFLDSP	32(SP), F10				// 0235
	CSWSP	X10, 20(SP)				// 2aca
	CSDSP	X10, 24(SP)				// 2aec
	CFSDSP	F10, 32(SP)				// 2ab0

	// 26.3.2: Compressed Register-Based Loads and Stores
	CLW	20(X10), X11				// 4c49
	CLD	24(X10), X11				// 0c6d

	register["g"] = arm.REG_R10
	for i := 0; i < 16; i++ {
		register[fmt.Sprintf("C%d", i)] = int16(i)
	}

	// Pseudo-registers.
	register["SB"] = RSB
	register["FP"] = RFP
	register["PC"] = RPC
	register["SP"] = RSP
	registerPrefix := map[string]bool{
		"F": true,
		"R": true,
	}

	// special operands for DMB/DSB instructions
	register["MB_SY"] = arm.REG_MB_SY
	register["MB_ST"] = arm.REG_MB_ST

type SelectParameters struct {
	s3select.S3Select
}

// IsEmpty returns true if no select parameters set
func (sp *SelectParameters) IsEmpty() bool {
	return sp == nil
}

var selectParamsXMLName = "SelectParameters"

// UnmarshalXML - decodes XML data.
func (sp *SelectParameters) UnmarshalXML(d *xml.Decoder, start xml.StartElement) error {
	// Essentially the same as S3Select barring the xml name.

// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.

TEXT errors(SB),$0
	MOVL	foo<>(SB)(AX), AX	// ERROR "invalid instruction"
	MOVL	(AX)(SP*1), AX		// ERROR "invalid instruction"
	EXTRACTPS $4, X2, (BX)          // ERROR "invalid instruction"
	EXTRACTPS $-1, X2, (BX)         // ERROR "invalid instruction"
	// VSIB addressing does not permit non-vector (X/Y)

	VAESDEC X7, X7, X31                                // 62624508deff or 6262c508deff
	VAESDEC -7(DI)(R8*1), X7, X31                      // 62224508debc07f9ffffff or 6222c508debc07f9ffffff
	VAESDEC (SP), X7, X31                              // 62624508de3c24 or 6262c508de3c24
	VAESDEC X24, X0, X31                               // 62027d08def8 or 6202fd08def8

		return claims, nil
	}

	// Check if a session policy is set. If so, decode it here.
	sp, spok := claims.Lookup(policy.SessionPolicyName)
	if spok {
		// Looks like subpolicy is set and is a string, if set then its
		// base64 encoded, decode it. Decoding fails reject such
		// requests.
		spBytes, err := base64.StdEncoding.DecodeString(sp)
		if err != nil {
			// Base64 decoding fails, we should log to indicate

				err = msgp.WrapError(err, "DiskID")
				return
			}
		case "sv":
			z.SrcVolume, err = dc.ReadString()
			if err != nil {
				err = msgp.WrapError(err, "SrcVolume")
				return
			}
		case "sp":
			z.SrcPath, err = dc.ReadString()
			if err != nil {
				err = msgp.WrapError(err, "SrcPath")
				return
			}
		case "dv":
			z.DstVolume, err = dc.ReadString()
			if err != nil {

		if !db.DisableNestedTransaction {
			spID := new(maphash.Hash).Sum64()
			err = db.SavePoint(fmt.Sprintf("sp%d", spID)).Error
			if err != nil {
				return
			}
			defer func() {
				// Make sure to rollback when panic, Block error or Commit error
				if panicked || err != nil {
					db.RollbackTo(fmt.Sprintf("sp%d", spID))
				}
			}()
		}
		err = fc(db.Session(&Session{NewDB: db.clone == 1}))
	} else {

			// Symbols without prefix or suffix are jump labels.
			return
		}
		p.errorf("illegal or missing addressing mode for symbol %s", name)
		return
	}
	// Expect (SB), (FP), (PC), or (SP)
	p.get('(')
	reg := p.get(scanner.Ident).String()
	p.get(')')
	p.setPseudoRegister(a, reg, isStatic, prefix)
}

// setPseudoRegister sets the NAME field of addr for a pseudo-register reference such as (SB).