"MULLW",
	"MULLWCC",
	"MULLWVCC",
	"MULLWV",
	"NAND",
	"NANDCC",
	"NEG",
	"NEGCC",
	"NEGVCC",
	"NEGV",
	"NOR",
	"NORCC",
	"OR",
	"ORCC",
	"ORN",
	"ORNCC",
	"ORIS",
	"REM",
	"REMU",
	"RFI",
	"RLWMI",
	"RLWMICC",
	"RLWNM",
	"RLWNMCC",
	"CLRLSLWI",
	"SLW",
	"SLWCC",
	"SRW",
	"SRAW",
	"SRAWCC",
	"SRWCC",
	"STBCCC",
	"STHCCC",

	// 386:"BSFL\t"
	// arm:"ORR\t\\$65536","CLZ",-"MOVHU\tR"
	// arm64:"ORR\t\\$65536","RBITW","CLZW",-"MOVHU\tR",-"RBIT\t",-"CLZ\t"
	// s390x:"FLOGR","OR\t\\$65536"
	// ppc64x/power8:"POPCNTD","ORIS\\t\\$1"
	// ppc64x/power9:"CNTTZD","ORIS\\t\\$1"
	// wasm:"I64Ctz"
	return bits.TrailingZeros16(n)
}

func TrailingZeros8(n uint8) int {
	// amd64:"BSFL","ORL\\t\\$256"
	// 386:"BSFL"
	// arm:"ORR\t\\$256","CLZ",-"MOVBU\tR"

		if p.From.Type == obj.TYPE_CONST && p.From.Offset != 0 && p.From.Offset&0xFFFF == 0 {
			// This is a constant shifted 16 bits to the left, convert it to ADDIS/ORIS $const,...
			p.As = AADDIS
			// Use ORIS for large constants which should not be sign extended.
			if p.From.Offset >= 0x80000000 {
				p.As = AORIS
			}
			p.Reg = REG_R0
			p.From.Offset >>= 16
		}

	case AMOVD:

}

// The prefixable optab entry contains the pseudo-opcodes which generate relocations, or may generate
// a more efficient sequence of instructions if a prefixed version exists (ex. paddi instead of oris/ori/add).
//
// This table is meant to transform all sequences which might be TOC-relative into an equivalent PC-relative
// sequence. It also encompasses several transformations which do not involve relocations, those could be

	OR $1234567, R5                 // 64a5001260a5d687
	OR $1234567, R5, R3             // 64a300126063d687
	OR $2147483648, R5, R3          // 64a38000
	OR $2147483649, R5, R3          // 64a3800060630001
	ORIS $255, R3, R4               // 646400ff
	OR $16711680, R3, R4            // 646400ff

	XOR $1, R3                      // 68630001
	XOR $1, R3, R4                  // 68640001

	NORCC:          "nor.",
	OR:             "or",
	ORCC:           "or.",
	ORC:            "orc",
	ORCCC:          "orc.",
	NOP:            "nop",
	ORI:            "ori",
	ORIS:           "oris",
	RLWIMI:         "rlwimi",
	RLWIMICC:       "rlwimi.",
	RLWINM:         "rlwinm",
	RLWINMCC:       "rlwinm.",
	RLWNM:          "rlwnm",
	RLWNMCC:        "rlwnm.",
	SLW:            "slw",

			var o1 uint32
			if target.IsBigEndian() {
				o1 = binary.BigEndian.Uint32(p[r.Off()-2:])
			} else {
				o1 = binary.LittleEndian.Uint32(p[r.Off():])
			}
			switch o1 >> 26 {
			case 25, // oris
				27, // xoris
				29: // andis
				if t>>16 != 0 {
					goto overflow
				}

			default:
				if int64(int16(t)) != t {
					goto overflow
				}
			}
		}