Register with arrangement and register with arrangement and index.

Examples:

	VADD V5.H8, V18.H8, V9.H8                     <=>    add v9.8h, v18.8h, v5.8h
	VLD1 (R2), [V21.B16]                          <=>    ld1 {v21.16b}, [x2]
	VST1.P V9.S[1], (R16)(R21)                    <=>    st1 {v9.s}[1], [x16], x28
	VST1.P [V13.H8, V14.H8, V15.H8], (R3)(R14)    <=>    st1 {v13.8h-v15.8h}, [x3], x14

	VADD	V3.S4, V7.S4, V3.S4
	VEOR	V12.B16, V0.B16, V12.B16
	VEOR	V13.B16, V1.B16, V13.B16
	VEOR	V14.B16, V2.B16, V14.B16
	VEOR	V15.B16, V3.B16, V15.B16
	VREV32	V12.H8, V12.H8
	VREV32	V13.H8, V13.H8
	VREV32	V14.H8, V14.H8
	VREV32	V15.H8, V15.H8
	// V8..V11 += V12..V15
	// V4..V7 <<<= ((V4..V7 XOR V8..V11), 12)
	VADD	V8.S4, V12.S4, V8.S4
	VADD	V9.S4, V13.S4, V9.S4
	VADD	V10.S4, V14.S4, V10.S4
	VADD	V11.S4, V15.S4, V11.S4

}

func arrange(a int) string {
	switch a {
	case ARNG_8B:
		return "B8"
	case ARNG_16B:
		return "B16"
	case ARNG_4H:
		return "H4"
	case ARNG_8H:
		return "H8"
	case ARNG_2S:
		return "S2"
	case ARNG_4S:
		return "S4"
	case ARNG_1D:
		return "D1"
	case ARNG_2D:
		return "D2"
	case ARNG_B:
		return "B"
	case ARNG_H:
		return "H"
	case ARNG_S:

// V30 is used as a temporary, and V31 is assumed to
// hold the index table for rotate left 8.
#define QR(A, B, C, D) \
	VADD A.S4, B.S4, A.S4; VEOR D.B16, A.B16, D.B16;   VREV32 D.H8, D.H8; \
	VADD C.S4, D.S4, C.S4; VEOR B.B16, C.B16, V30.B16; VSHL $12, V30.S4, B.S4; VSRI $20, V30.S4, B.S4 \
	VADD A.S4, B.S4, A.S4; VEOR D.B16, A.B16, D.B16;   VTBL V31.B16, [D.B16], D.B16; \

	SHA256SU0	V6.S4, V5.S4                        // V5: (su0(W5)+W4,...,su0(W8)+W7)
	SHA256SU1	V7.S4, V6.S4, V4.S4                 // V4: W16-W19
	HASHUPDATE                                          // H8

	VADD	V18.S4, V6.S4, V9.S4                        // V18(W8+K8...W11+K11)
	SHA256SU0	V7.S4, V6.S4                        // V6: (su0(W9)+W8,...,su0(W12)+W11)
	SHA256SU1	V4.S4, V7.S4, V5.S4                 // V5: W20-W23

00000130  a5 96 66 5c 4e 49 5a 8e  fd 9d 74 dc e7 f0 99 f8  |..f\NIZ...t.....|
00000140  d5 95 7a 5b ba b6 ab 87  90 a5 35 19 bf 99 2c 04  |..z[......5...,.|
00000150  93 61 e3 9b 5c 06 48 38  f0 25 8a be 30 cd 43 c0  |.a..\.H8.%..0.C.|
00000160  10 c9 1d 51 3e 93 5f 6c  02 1c 38 fe 78 44 1a ea  |...Q>._l..8.xD..|
00000170  99 a4 ef 7d 03 ce 71 95  d7 1d e1 b3 b8 e2 20 99  |...}..q....... .|