// A FileMode represents a file's mode and permission bits.
// The bits have the same definition on all systems, so that
// information about files can be moved from one system
// to another portably. Not all bits apply to all systems.
// The only required bit is [ModeDir] for directories.
type FileMode = fs.FileMode

// The defined file mode bits are the most significant bits of the [FileMode].

	}
	if tp.typ == nil {
		// Handle small objects.
		// Clear any bits before the target address.
		tp.mask &^= (1 << ((target - tp.addr) / goarch.PtrSize)) - 1
		// Clear any bits past the limit.
		if tp.addr+goarch.PtrSize*ptrBits > limit {
			bits := (tp.addr + goarch.PtrSize*ptrBits - limit) / goarch.PtrSize
			tp.mask &^= ((1 << (bits)) - 1) << (ptrBits - bits)
		}
		return tp
	}

	// Move up elem and addr.

			if c >= 1<<bits {
				t.Fatalf("compress(%d, %d) = %d >= 2^bits", a, bits, c)
			}
			got := decompress(c, bits)
			diff := min(a-got, got-a, a-got+q, got-a+q)
			ceil := q / (1 << bits)
			if diff > fieldElement(ceil) {
				t.Fatalf("decompress(compress(%d, %d), %d) = %d (diff %d, max diff %d)",
					a, bits, bits, got, diff, ceil)
			}
		}
	}
}

func CompressRat(x fieldElement, d uint8) uint16 {
	if x >= q {

  public static HashFunction goodFastHash(int minimumBits) {
    int bits = checkPositiveAndMakeMultipleOf32(minimumBits);

    if (bits == 32) {
      return Murmur3_32HashFunction.GOOD_FAST_HASH_32;
    }
    if (bits <= 128) {
      return Murmur3_128HashFunction.GOOD_FAST_HASH_128;
    }

    // Otherwise, join together some 128-bit murmur3s
    int hashFunctionsNeeded = (bits + 127) / 128;

		b |= b >> 4
		b -= b >> 1
		coverageSnapshot[i] = b
	}
}

// diffCoverage returns a set of bits set in snapshot but not in base.
// If there are no new bits set, diffCoverage returns nil.
func diffCoverage(base, snapshot []byte) []byte {
	if len(base) != len(snapshot) {
		panic(fmt.Sprintf("the number of coverage bits changed: before=%d, after=%d", len(base), len(snapshot)))
	}
	found := false
	for i := range snapshot {

	_ = x[len(z)-1] // bounds check elimination hint
	for i := range z {
		hi, lo := bits.Mul(x[i], y)
		lo, c := bits.Add(lo, z[i], 0)
		// We use bits.Add with zero to get an add-with-carry instruction that
		// absorbs the carry from the previous bits.Add.
		hi, _ = bits.Add(hi, 0, c)
		lo, c = bits.Add(lo, carry, 0)
		hi, _ = bits.Add(hi, 0, c)
		carry = hi
		z[i] = lo
	}
	return carry
}

	}
	fmt.Fprintf(w, "\n")

	fmt.Fprintf(w, "// %-9s  %-4s  %-12s\n", "alignment", "bits", "min obj size")
	for bits, size := range minAligns {
		if size == 0 {
			break
		}
		if bits+1 < len(minAligns) && size == minAligns[bits+1] {
			continue
		}
		fmt.Fprintf(w, "// %9d  %4d  %12d\n", 1<<bits, bits, size)
	}
	fmt.Fprintf(w, "\n")
}

func maxObjsPerSpan(classes []class) int {
	most := 0

// The SHA3-x (x equals 224, 256, 384, or 512) functions have a security
// strength against preimage attacks of x bits. Since they only produce "x"
// bits of output, their collision-resistance is only "x/2" bits.
//
// The SHAKE-256 and -128 functions have a generic security strength of 256 and
// 128 bits against all attacks, provided that at least 2x bits of their output
// is used.  Requesting more than 64 or 32 bytes of output, respectively, does

    /**
     * Sets {@code numHashFunctions} bits of the given bit array, by hashing a user element.
     *
     * <p>Returns whether any bits changed as a result of this operation.
     */
    <T extends @Nullable Object> boolean put(
        @ParametricNullness T object,
        Funnel<? super T> funnel,
        int numHashFunctions,
        LockFreeBitArray bits);

    /**

}

// writeLSB writes the code c for "Least Significant Bits first" data.
func (w *Writer) writeLSB(c uint32) error {
	w.bits |= c << w.nBits
	w.nBits += w.width
	for w.nBits >= 8 {
		if err := w.w.WriteByte(uint8(w.bits)); err != nil {
			return err
		}
		w.bits >>= 8
		w.nBits -= 8
	}
	return nil
}

// writeMSB writes the code c for "Most Significant Bits first" data.
func (w *Writer) writeMSB(c uint32) error {