pkg math/bits (windows-amd64), const UintSize = 64
pkg math/bits, const UintSize ideal-int
pkg math/bits, func LeadingZeros(uint) int
pkg math/bits, func LeadingZeros16(uint16) int
pkg math/bits, func LeadingZeros32(uint32) int
pkg math/bits, func LeadingZeros64(uint64) int
pkg math/bits, func LeadingZeros8(uint8) int
pkg math/bits, func Len(uint) int
pkg math/bits, func Len16(uint16) int
pkg math/bits, func Len32(uint32) int

	// least-significant places and masks off anything above.
	n = (br.n >> (br.bits - bits)) & ((1 << bits) - 1)
	br.bits -= bits
	return
}

func (br *bitReader) ReadBits(bits uint) (n int) {
	n64 := br.ReadBits64(bits)
	return int(n64)
}

func (br *bitReader) ReadBit() bool {
	n := br.ReadBits(1)
	return n != 0
}

func (br *bitReader) Err() error {
	return br.err

		},
		{
			name:         "Get bits of mask 01",
			bits:         []int{0},
			expectedBits: []int{0},
		},
		{
			name:         "Get bits of mask 11",
			bits:         []int{0, 1},
			expectedBits: []int{0, 1},
		},
	}
	for _, tc := range tcases {
		mask, _ := NewBitMask(tc.bits...)
		bits := mask.GetBits()
		if !reflect.DeepEqual(bits, tc.expectedBits) {

		panic(fmt.Sprintf("invalid bitfiled %v", b))
	}
	return (i[b.Word] >> (32 - b.Offs - b.Bits)) & ((1 << b.Bits) - 1)
}

// ParseSigned extracts the bitfield b from i, and return it as a signed integer.
// ParseSigned will panic if b is invalid.
func (b BitField) ParseSigned(i [2]uint32) int32 {
	u := int32(b.Parse(i))
	return u << (32 - b.Bits) >> (32 - b.Bits)
}

		d = a + bits.RotateLeft32((a^b^c)+d+x4+0x4bdecfa9, 11)
		c = d + bits.RotateLeft32((d^a^b)+c+x7+0xf6bb4b60, 16)
		b = c + bits.RotateLeft32((c^d^a)+b+xa+0xbebfbc70, 23)
		a = b + bits.RotateLeft32((b^c^d)+a+xd+0x289b7ec6, 4)
		d = a + bits.RotateLeft32((a^b^c)+d+x0+0xeaa127fa, 11)
		c = d + bits.RotateLeft32((d^a^b)+c+x3+0xd4ef3085, 16)
		b = c + bits.RotateLeft32((c^d^a)+b+x6+0x04881d05, 23)

		for ; i < 16; i++ {
			f := b&c | (^b)&d
			t := bits.RotateLeft32(a, 5) + f + e + w[i&0xf] + _K0
			a, b, c, d, e = t, a, bits.RotateLeft32(b, 30), c, d
		}
		for ; i < 20; i++ {
			tmp := w[(i-3)&0xf] ^ w[(i-8)&0xf] ^ w[(i-14)&0xf] ^ w[(i)&0xf]
			w[i&0xf] = bits.RotateLeft32(tmp, 1)

			f := b&c | (^b)&d
			t := bits.RotateLeft32(a, 5) + f + e + w[i&0xf] + _K0
			a, b, c, d, e = t, a, bits.RotateLeft32(b, 30), c, d
		}

package bits_test

import (
	"fmt"
	"math/bits"
)

func ExampleAdd32() {
	// First number is 33<<32 + 12
	n1 := []uint32{33, 12}
	// Second number is 21<<32 + 23
	n2 := []uint32{21, 23}
	// Add them together without producing carry.
	d1, carry := bits.Add32(n1[1], n2[1], 0)
	d0, _ := bits.Add32(n1[0], n2[0], carry)
	nsum := []uint32{d0, d1}

        LockFreeBitArray bits) {
      long bitSize = bits.bitSize();
      long hash64 = Hashing.murmur3_128().hashObject(object, funnel).asLong();
      int hash1 = (int) hash64;
      int hash2 = (int) (hash64 >>> 32);

      boolean bitsChanged = false;
      for (int i = 1; i <= numHashFunctions; i++) {
        int combinedHash = hash1 + (i * hash2);
        // Flip all the bits if it's negative (guaranteed positive number)

}

// uint128 holds a 128-bit number as two 64-bit limbs, for use with the
// bits.Mul64 and bits.Add64 intrinsics.
type uint128 struct {
	lo, hi uint64
}

func mul64(a, b uint64) uint128 {
	hi, lo := bits.Mul64(a, b)
	return uint128{lo, hi}
}

func add128(a, b uint128) uint128 {
	lo, c := bits.Add64(a.lo, b.lo, 0)
	hi, c := bits.Add64(a.hi, b.hi, c)
	if c != 0 {
		panic("poly1305: unexpected overflow")
	}

			v1 := w[i-2]
			t1 := (bits.RotateLeft32(v1, -17)) ^ (bits.RotateLeft32(v1, -19)) ^ (v1 >> 10)
			v2 := w[i-15]
			t2 := (bits.RotateLeft32(v2, -7)) ^ (bits.RotateLeft32(v2, -18)) ^ (v2 >> 3)
			w[i] = t1 + w[i-7] + t2 + w[i-16]
		}

		a, b, c, d, e, f, g, h := h0, h1, h2, h3, h4, h5, h6, h7

		for i := 0; i < 64; i++ {