MOVBU	name(SB), R4		// 1e00001ac403002a
	MOVF	name(SB), F4		// 1e00001ac403002b
	MOVD	name(SB), F4		// 1e00001ac403802b
	MOVH	R4, name(SB)		// 1e00001ac4034029
	MOVH	name(SB), R4		// 1e00001ac4034028
	MOVHU	R4, name(SB)		// 1e00001ac4034029

	// ppc64le:`MOVHZ\s`,-`MOVBZ`
	// arm64:`MOVHU\s\(R[0-9]+\),`,-`MOVB`
	// s390x:`MOVHBR\s\(.*\),`
	// ppc64:`MOVHBR\s`,-`MOVBZ`
	return binary.LittleEndian.Uint16(b)
}

func load_le16_idx(b []byte, idx int) uint16 {
	// amd64:`MOVWLZX\s\(.*\),`,-`MOVB`,-`OR`
	// ppc64le:`MOVHZ\s`,-`MOVBZ`
	// ppc64:`MOVHBR\s`,-`MOVBZ`
	// arm64:`MOVHU\s\(R[0-9]+\)\(R[0-9]+\),`,-`MOVB`
	// s390x:`MOVHBR\s\(.*\)\(.*\*1\),`

	"BGEU",
	"DIV",
	"DIVD",
	"DIVF",
	"DIVU",
	"DIVW",
	"LL",
	"LLV",
	"LUI",
	"MOVB",
	"MOVBU",
	"MOVD",
	"MOVDF",
	"MOVDW",
	"MOVF",
	"MOVFD",
	"MOVFW",
	"MOVH",
	"MOVHU",
	"MOVW",
	"MOVWD",
	"MOVWF",
	"MOVWL",
	"MOVWR",
	"MUL",
	"MULD",
	"MULF",
	"MULU",
	"MULH",
	"MULHU",
	"MULW",
	"NEGD",
	"NEGF",
	"NEGW",
	"NEGV",
	"NOOP",
	"NOR",

	EOR	R4, R5
	CBNZ	R5, not_equal
	SUB	$4, R2, R6	// offset of the last 4 bytes
	MOVWU	(R0)(R6), R4
	MOVWU	(R1)(R6), R5
	EOR	R4, R5
	CBNZ	R5, not_equal
	B	equal
lt_4:
	TBZ	$1, R2, lt_2
	MOVHU.P	2(R0), R4
	MOVHU.P	2(R1), R5
	CMP	R4, R5
	BNE	not_equal
lt_2:
	TBZ	$0, R2, equal
one:
	MOVBU	(R0), R4
	MOVBU	(R1), R5
	CMP	R4, R5
	BNE	not_equal
equal:
	MOVD	$1, R0
	RET
not_equal:

var plan9OpMap = map[Op]string{
	LWARX:     "LWAR",
	LDARX:     "LDAR",
	LHARX:     "LHAR",
	LBARX:     "LBAR",
	LWAX:      "MOVW",
	LHAX:      "MOVH",
	LWAUX:     "MOVWU",
	LHAU:      "MOVHU",
	LHAUX:     "MOVHU",
	LDX:       "MOVD",
	LDUX:      "MOVDU",
	LWZX:      "MOVWZ",
	LWZUX:     "MOVWZU",
	LHZX:      "MOVHZ",
	LHZUX:     "MOVHZU",
	LBZX:      "MOVBZ",
	LBZUX:     "MOVBZU",

	SUB	$8, R6
	B	tail
lt_8:
	TBZ	$2, R6, lt_4
	MOVWU	(R0), R4
	MOVWU	(R2), R5
	CMPW	R4, R5
	BNE	cmp
	SUBS	$4, R6
	BEQ	samebytes
	ADD	$4, R0
	ADD	$4, R2
lt_4:
	TBZ	$1, R6, lt_2
	MOVHU	(R0), R4
	MOVHU	(R2), R5
	CMPW	R4, R5
	BNE	cmp
	ADD	$2, R0
	ADD	$2, R2
lt_2:
	TBZ	$0, R6, samebytes
one:
	MOVBU	(R0), R4
	MOVBU	(R2), R5
	CMPW	R4, R5
	BNE	ret
samebytes:
	CMP	R3, R1

	"NEGD",
	"SRL",
	"SRA",
	"SLL",
	"MULU",
	"DIVU",
	"MUL",
	"MMUL",
	"DIV",
	"MOD",
	"MODU",
	"DIVHW",
	"DIVUHW",
	"MOVB",
	"MOVBS",
	"MOVBU",
	"MOVH",
	"MOVHS",
	"MOVHU",
	"MOVW",
	"MOVM",
	"SWPBU",
	"SWPW",
	"RFE",
	"SWI",
	"MULA",
	"MULS",
	"MMULA",
	"MMULS",
	"WORD",
	"MULL",
	"MULAL",
	"MULLU",
	"MULALU",
	"BX",
	"BXRET",

	"BLE",
	"BLEU",
	"BLEZ",
	"BLTZ",
	"BNEZ",
	"FABSD",
	"FABSS",
	"FNEGD",
	"FNEGS",
	"FNED",
	"FNES",
	"MOV",
	"MOVB",
	"MOVBU",
	"MOVF",
	"MOVD",
	"MOVH",
	"MOVHU",
	"MOVW",
	"MOVWU",
	"NEG",
	"NEGW",
	"NOT",
	"SEQZ",
	"SNEZ",
	"LAST",

	"LDXPW",
	"LDXR",
	"LDXRB",
	"LDXRH",
	"LDXRW",
	"LSL",
	"LSLW",
	"LSR",
	"LSRW",
	"MADD",
	"MADDW",
	"MNEG",
	"MNEGW",
	"MOVB",
	"MOVBU",
	"MOVD",
	"MOVH",
	"MOVHU",
	"MOVK",
	"MOVKW",
	"MOVN",
	"MOVNW",
	"MOVP",
	"MOVPD",
	"MOVPQ",
	"MOVPS",
	"MOVPSW",
	"MOVPW",
	"MOVW",
	"MOVWU",
	"MOVZ",
	"MOVZW",
	"MRS",
	"MSR",

	MOVD	R6, (R0)
	MOVD	R7, -8(R5)
	RET

copy7:
	TBZ	$2, R2, copy3
	MOVWU	(R1), R6
	MOVWU	-4(R4), R7
	MOVW	R6, (R0)
	MOVW	R7, -4(R5)
	RET

copy3:
	TBZ	$1, R2, copy1
	MOVHU	(R1), R6
	MOVHU	-2(R4), R7
	MOVH	R6, (R0)
	MOVH	R7, -2(R5)
	RET

copy1:
	MOVBU	(R1), R6
	MOVB	R6, (R0)

copy0:
	RET

	// Medium copies: 33..128 bytes.
copy32_128: