MOVHS	R1, 0x00ffffff(R2)   // MOVHS R1, 16777215(R2)
	MOVHS.W	R1, 0x00ffffff(R2)   // MOVHS.W R1, 16777215(R2)
	MOVHS.P	R1, 0x00ffffff(R2)   // MOVHS.P R1, 16777215(R2)
	MOVHS	R1, -0x00ffffff(R2)  // MOVHS R1, -16777215(R2)
	MOVHS.W	R1, -0x00ffffff(R2)  // MOVHS.W R1, -16777215(R2)
	MOVHS.P	R1, -0x00ffffff(R2)  // MOVHS.P R1, -16777215(R2)
	MOVHS	0x00ffffff(R2), R1   // MOVHS 16777215(R2), R1

	"NEGF",
	"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",

	BFC	$12, $8, R2, R3    // ERROR "illegal combination"
	MOVB	R0>>8, R2          // ERROR "illegal shift"
	MOVH	R0<<16, R2         // ERROR "illegal shift"
	MOVBS	R0->8, R2          // ERROR "illegal shift"
	MOVHS	R0<<24, R2         // ERROR "illegal shift"
	MOVBU	R0->24, R2         // ERROR "illegal shift"
	MOVHU	R0@>1, R2          // ERROR "illegal shift"
	XTAB	R0>>8, R2          // ERROR "illegal shift"

	case LDRSB_EQ:
		op = "MOVBS" + op[5:] + suffix
	case SXTB_EQ:
		op = "MOVBS" + op[4:] + suffix
	case LDRH_EQ, UXTH_EQ:
		op = "MOVHU" + op[4:] + suffix
	case LDRSH_EQ:
		op = "MOVHS" + op[5:] + suffix
	case SXTH_EQ:
		op = "MOVHS" + op[4:] + suffix
	case STR_EQ:
		op = "MOVW" + op[3:] + suffix
		args[0], args[1] = args[1], args[0]
	case STRB_EQ:
		op = "MOVB" + op[4:] + suffix
		args[0], args[1] = args[1], args[0]

		{name: "MOVBUreg", argLength: 1, reg: gp11, asm: "MOVBU"}, // move from arg0, unsign-extended from byte
		{name: "MOVHreg", argLength: 1, reg: gp11, asm: "MOVHS"},  // move from arg0, sign-extended from half
		{name: "MOVHUreg", argLength: 1, reg: gp11, asm: "MOVHU"}, // move from arg0, unsign-extended from half
		{name: "MOVWreg", argLength: 1, reg: gp11, asm: "MOVW"},   // move from arg0

		}
		o1 = c.osrr(int(p.From.Reg), int(p.To.Offset), int(p.To.Reg), int(p.Scond))
		if p.As == AMOVB || p.As == AMOVBS || p.As == AMOVBU {
			o1 |= 1 << 22
		}

	case 62: /* MOVH/MOVHS/MOVHU Reg, Reg<<0(Reg) -> strh */
		if p.To.Reg == 0 {
			c.ctxt.Diag("MOV to shifter operand")
		}
		if p.To.Offset&(^0xf) != 0 {
			c.ctxt.Diag("bad shift: %v", p)
		}