func archErf(x float64) float64 {
	panic("not implemented")
}

const haveArchErfc = false

func archErfc(x float64) float64 {
	panic("not implemented")
}

const haveArchExpm1 = false

func archExpm1(x float64) float64 {
	panic("not implemented")
}

const haveArchFrexp = false

func archFrexp(x float64) (float64, int) {
	panic("not implemented")
}

const haveArchLdexp = false

func cbrtAsm(x float64) float64

const haveArchTan = true

func archTan(x float64) float64
func tanTrampolineSetup(x float64) float64
func tanAsm(x float64) float64

const haveArchExpm1 = true

func archExpm1(x float64) float64
func expm1TrampolineSetup(x float64) float64
func expm1Asm(x float64) float64

const haveArchPow = true

func archPow(x, y float64) float64
func powTrampolineSetup(x, y float64) float64

// Special cases are:
//
//	Expm1(+Inf) = +Inf
//	Expm1(-Inf) = -1
//	Expm1(NaN) = NaN
//
// Very large values overflow to -1 or +Inf.
func Expm1(x float64) float64 {
	if haveArchExpm1 {
		return archExpm1(x)
	}
	return expm1(x)
}

func expm1(x float64) float64 {
	const (
		Othreshold = 7.09782712893383973096e+02 // 0x40862E42FEFA39EF
		Ln2X56     = 3.88162421113569373274e+01 // 0x4043687a9f1af2b1

	MOVD $·expAsm(SB), R2
	MOVD R2, 0(R1)
	BR   ·expAsm(SB)

GLOBL ·expvectorfacility+0x00(SB), NOPTR, $8
DATA ·expvectorfacility+0x00(SB)/8, $·expTrampolineSetup(SB)

TEXT ·archExpm1(SB), NOSPLIT, $0
	MOVD ·expm1vectorfacility+0x00(SB), R1
	BR   (R1)

TEXT ·expm1TrampolineSetup(SB), NOSPLIT, $0
	MOVB   ·hasVX(SB), R1