return x<<7 ^ x2>>25 // arm64:"EXTRW\t[$]25,"
}

// check 32-bit shift masking
func mask32(x uint32) uint32 {
	return (x << 29) >> 29 // arm64:"AND\t[$]7, R[0-9]+",-"LSR",-"LSL"
}

// check 16-bit shift masking
func mask16(x uint16) uint16 {
	return (x << 14) >> 14 // arm64:"AND\t[$]3, R[0-9]+",-"LSR",-"LSL"
}

// check 8-bit shift masking
func mask8(x uint8) uint8 {

"src/compress/flate/testdata/huffman-rand-max.in", "src/compress/flate/testdata/huffman-shifts.dyn.expect", "src/compress/flate/testdata/huffman-shifts.dyn.expect-noinput", "src/compress/flate/testdata/huffman-shifts.golden", "src/compress/flate/testdata/huffman-shifts.in", "src/compress/flate/testdata/huffman-shifts.wb.expect", "src/compress/flate/testdata/huffman-shifts.wb.expect-noinput", "src/compress/flate/testdata/huffman-text-shift.dyn.expect", "src/compress/flate/testdata/huffman-text-shift.dyn.expect-noinput",...

// license that can be found in the LICENSE file.

// Non-Go-constant but constant values aren't ok for shifts.

package p

import "unsafe"

func f() {
	_ = complex(1<<uintptr(unsafe.Pointer(nil)), 0) // ERROR "invalid operation: shifted operand 1 \(type float64\) must be integer|non-integer type for left operand of shift"

// Example from #52031.
//
// The following shifts should not produce errors on Go < 1.13, as their
// untyped constant operands are representable by type uint.
const (
	_ resultFlags = (1 << iota) / 2

	reportEqual
	reportUnequal
	reportByIgnore
	reportByMethod
	reportByFunc
	reportByCycle
)

// Invalid cases.
var x int = 1
var _ = (8 << x /* ERRORx `signed shift count .* requires go1.13 or later` */)

"src/compress/flate/testdata/huffman-rand-max.in", "src/compress/flate/testdata/huffman-shifts.dyn.expect", "src/compress/flate/testdata/huffman-shifts.dyn.expect-noinput", "src/compress/flate/testdata/huffman-shifts.golden", "src/compress/flate/testdata/huffman-shifts.in", "src/compress/flate/testdata/huffman-shifts.wb.expect", "src/compress/flate/testdata/huffman-shifts.wb.expect-noinput", "src/compress/flate/testdata/huffman-text-shift.dyn.expect", "src/compress/flate/testdata/huffman-text-shift.dyn.expect-noinput",...

(Rsh64x64 [c] x (Int64Make (Const32 [0]) lo)) => (Rsh64x32 [c] x lo)
(Rsh64Ux64 [c] x (Int64Make (Const32 [0]) lo)) => (Rsh64Ux32 [c] x lo)

// turn x64 non-constant shifts to x32 shifts
// if high 32-bit of the shift is nonzero, make a huge shift
(Lsh64x64 x (Int64Make hi lo)) && hi.Op != OpConst32 =>
       (Lsh64x32 x (Or32 <typ.UInt32> (Zeromask hi) lo))
(Rsh64x64 x (Int64Make hi lo)) && hi.Op != OpConst32 =>

		// the compiler to generate better code for the shift operation.
		shift := uint(bits.TrailingZeros(uint(base))) & 7
		b := uint64(base)
		m := uint(base) - 1 // == 1<<shift - 1
		for u >= b {
			i--
			a[i] = digits[uint(u)&m]
			u >>= shift
		}
		// u < base
		i--
		a[i] = digits[uint(u)]
	} else {
		// general case
		b := uint64(base)
		for u >= b {
			i--

specified alignment.

6. Shift instructions

The simple scalar shifts on PPC64 expect a shift count that fits in 5 bits for
32-bit values or 6 bit for 64-bit values. If the shift count is a constant value
greater than the max then the assembler sets it to the max for that size (31 for
32 bit values, 63 for 64 bit values). If the shift count is in a register, then

	sign = uint32(b >> 63)
	exp = int32(b>>52) & mask
	mantissa = b & fracMask

	if exp == 0 {
		// Normalize value if subnormal.
		shift := uint(bits.LeadingZeros64(mantissa) - 11)
		mantissa <<= shift
		exp = 1 - int32(shift)
	} else {
		// Add implicit 1 bit
		mantissa |= 1 << 52
	}
	return
}

// FMA returns x * y + z, computed with only one rounding.

	if one16<<N<<N == 1 {
		t.Errorf("shift overflow mishandled")
	}
	if one16>>N>>N == 1 {
		t.Errorf("shift overflow mishandled")
	}
	if one16u>>N>>N == 1 {
		t.Errorf("shift overflow mishandled")
	}
	if one8<<N<<N == 1 {
		t.Errorf("shift overflow mishandled")
	}
	if one8>>N>>N == 1 {
		t.Errorf("shift overflow mishandled")
	}
	if one8u>>N>>N == 1 {
		t.Errorf("shift overflow mishandled")
	}
}