}

var S390X struct {
	_         CacheLinePad
	HasZARCH  bool // z architecture mode is active [mandatory]
	HasSTFLE  bool // store facility list extended [mandatory]
	HasLDISP  bool // long (20-bit) displacements [mandatory]
	HasEIMM   bool // 32-bit immediates [mandatory]
	HasDFP    bool // decimal floating point
	HasETF3EH bool // ETF-3 enhanced
	HasMSA    bool // message security assist (CPACF)

// feature bit being set.
var S390X struct {
	_         CacheLinePad
	HasZARCH  bool // z/Architecture mode is active [mandatory]
	HasSTFLE  bool // store facility list extended
	HasLDISP  bool // long (20-bit) displacements
	HasEIMM   bool // 32-bit immediates
	HasDFP    bool // decimal floating point
	HasETF3EH bool // ETF-3 enhanced
	HasMSA    bool // message security assist (CPACF)
	HasAES    bool // KM-AES{128,192,256} functions

	VPGATHERQQ X8, 0(X9*4), X10             // c422b991148d00000000
	VPGATHERQQ Y8, 0(Y9*4), Y10             // c422bd91148d00000000
	// AVX2GATHER: test SP/BP base with different displacements.
	VPGATHERQQ X0, (SP)(X1*1), X2           // c4e2f991140c
	VPGATHERQQ X0, 16(SP)(X1*1), X2         // c4e2f991540c10
	VPGATHERQQ X0, 512(SP)(X1*1), X2        // c4e2f991940c00020000

	C_SACON    // computed address, 16-bit displacement, possibly SP-relative
	C_LACON    // computed address, 32-bit displacement, possibly SP-relative
	C_DACON    // computed address, 64-bit displacement?
	C_SBRA     // short branch
	C_LBRA     // long branch
	C_SAUTO    // short auto
	C_LAUTO    // long auto
	C_ZOREG    // heap address, register-based, displacement == 0

	return (evex.b2&evexRounding)>>1 != 0
}

// SaeEnabled reports whether SAE suffix is permitted.
func (evex evexBits) SaeEnabled() bool {
	return (evex.b2&evexSae)>>0 != 0
}

// DispMultiplier returns displacement multiplier that is calculated
// based on tuple type, EVEX.W and input size.
// If embedded broadcast is used, bcst should be true.
func (evex evexBits) DispMultiplier(bcst bool) int32 {
	if bcst {

	MOVB	$-1, n-8(SP)          // 92fff010
	MOVB	$255, 4096(R4)        // ebff40000152
	MOVB	$-128, -524288(R5)    // eb8050008052
	MOVB	$1, -524289(R6)       // c0a1fff7ffff41aa60009201a000

	// RX (12-bit displacement) and RXY (20-bit displacement) instruction encoding (e.g: ST vs STY)
	MOVW	R1, 4095(R2)(R3)       // 50132fff
	MOVW	R1, 4096(R2)(R3)       // e31320000150
	MOVWZ	R1, 4095(R2)(R3)       // 50132fff

	if cnt == 0 {
		return p
	}

	// Adjust the frame to account for LR.
	off += base.Ctxt.Arch.FixedFrameSize
	reg := int16(s390x.REGSP)

	// If the off cannot fit in a 12-bit unsigned displacement then we
	// need to create a copy of the stack pointer that we can adjust.
	// We also need to do this if we are going to loop.
	if off < 0 || off > 4096-clearLoopCutoff || cnt > clearLoopCutoff {

	// a relative displacement of referenced symbol's GOT entry to the TOC pointer.
	R_ADDRPOWER_GOT

	// R_ADDRPOWER_GOT_PCREL34 is identical to R_ADDRPOWER_GOT, but uses a PC relative
	// sequence to generate a GOT symbol addresses.
	R_ADDRPOWER_GOT_PCREL34

	// R_ADDRPOWER_PCREL relocates two D-form instructions like R_ADDRPOWER, but
	// inserts the displacement from the place being relocated to the address of the

type facility uint8

const (
	// mandatory facilities
	zarch  facility = 1  // z architecture mode is active
	stflef facility = 7  // store-facility-list-extended
	ldisp  facility = 18 // long-displacement
	eimm   facility = 21 // extended-immediate

	// miscellaneous facilities
	dfp    facility = 42 // decimal-floating-point
	etf3eh facility = 30 // extended-translation 3 enhancement

	// cryptography facilities

type facility uint8

const (
	// mandatory facilities
	zarch  facility = 1  // z architecture mode is active
	stflef facility = 7  // store-facility-list-extended
	ldisp  facility = 18 // long-displacement
	eimm   facility = 21 // extended-immediate

	// miscellaneous facilities
	dfp    facility = 42 // decimal-floating-point
	etf3eh facility = 30 // extended-translation 3 enhancement

	// cryptography facilities