in:   1,
			out:  [4]any{bits.LeadingZeros8(1), bits.LeadingZeros16(1), bits.LeadingZeros32(1), bits.LeadingZeros64(1)},
		},
		{
			name: "TrailingZeros",
			in:   14,
			out:  [4]any{bits.TrailingZeros8(14), bits.TrailingZeros16(14), bits.TrailingZeros32(14), bits.TrailingZeros64(14)},
		},
		{
			name: "OnesCount",
			in:   14,
			out:  [4]any{bits.OnesCount8(14), bits.OnesCount16(14), bits.OnesCount32(14), bits.OnesCount64(14)},
		},

	// arm:"CLZ"
	// arm64:"RBITW","CLZW"
	// s390x:"FLOGR","MOVWZ"
	// ppc64x/power8:"ANDN","POPCNTW"
	// ppc64x/power9: "CNTTZW"
	// wasm:"I64Ctz"
	return bits.TrailingZeros32(n)
}

func TrailingZeros16(n uint16) int {
	// amd64:"BSFL","ORL\\t\\$65536"
	// 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"

}

// TrailingZeros8 returns the number of trailing zero bits in x; the result is 8 for x == 0.
func TrailingZeros8(x uint8) int {
	return int(ntz8tab[x])
}

// TrailingZeros16 returns the number of trailing zero bits in x; the result is 16 for x == 0.
func TrailingZeros16(x uint16) int {
	if x == 0 {
		return 16
	}
	// see comment in TrailingZeros64
	return int(deBruijn32tab[uint32(x&-x)*deBruijn32>>(32-5)])
}

// ntzX returns the number of trailing zeros.
func ntz64(x int64) int { return bits.TrailingZeros64(uint64(x)) }
func ntz32(x int32) int { return bits.TrailingZeros32(uint32(x)) }
func ntz16(x int16) int { return bits.TrailingZeros16(uint16(x)) }
func ntz8(x int8) int   { return bits.TrailingZeros8(uint8(x)) }

func oneBit(x int64) bool   { return x&(x-1) == 0 && x != 0 }
func oneBit8(x int8) bool   { return x&(x-1) == 0 && x != 0 }

		},
		sys.MIPS)
	addF("math/bits", "TrailingZeros16",
		func(s *state, n *ir.CallExpr, args []*ssa.Value) *ssa.Value {
			return s.newValue1(ssa.OpCtz16, types.Types[types.TINT], args[0])
		},
		sys.AMD64, sys.I386, sys.ARM, sys.ARM64, sys.Wasm)
	addF("math/bits", "TrailingZeros16",
		func(s *state, n *ir.CallExpr, args []*ssa.Value) *ssa.Value {

		{"RotateLeft32", Func, 9},
		{"RotateLeft64", Func, 9},
		{"RotateLeft8", Func, 9},
		{"Sub", Func, 12},
		{"Sub32", Func, 12},
		{"Sub64", Func, 12},
		{"TrailingZeros", Func, 9},
		{"TrailingZeros16", Func, 9},
		{"TrailingZeros32", Func, 9},
		{"TrailingZeros64", Func, 9},
		{"TrailingZeros8", Func, 9},
		{"UintSize", Const, 9},
	},
	"math/cmplx": {
		{"Abs", Func, 0},