*
 * @author Louis Wasserman
 */
@GwtIncompatible
@ElementTypesAreNonnullByDefault
final class DoubleUtils {
  private DoubleUtils() {}

  static double nextDown(double d) {
    return -Math.nextUp(-d);
  }

  // The mask for the significand, according to the {@link
  // Double#doubleToRawLongBits(double)} spec.
  static final long SIGNIFICAND_MASK = 0x000fffffffffffffL;

	assignedToUnit := MakeBitmap(l.NSym() + 1)

	// Start off textp with reachable external syms.
	textp := []Sym{}
	for _, sym := range extsyms {
		if !l.attrReachable.Has(sym) {
			continue
		}
		textp = append(textp, sym)
	}

	// Walk through all text symbols from Go object files and append
	// them to their corresponding library's textp list.
	for _, r := range l.objs[goObjStart:] {
		lib := r.unit.Lib

      trueLog2 = StrictMath.nextUp(trueLog2);
    }
    // decrement until it's <= the true value
    while (StrictMath.pow(2.0, trueLog2) > d) {
      trueLog2 = StrictMath.nextAfter(trueLog2, Double.NEGATIVE_INFINITY);
    }
    if (StrictMath.abs(StrictMath.pow(2.0, trueLog2) - d)
        > StrictMath.abs(StrictMath.pow(2.0, StrictMath.nextUp(trueLog2)) - d)) {
      trueLog2 = StrictMath.nextUp(trueLog2);

 *
 * @author Louis Wasserman
 */
@GwtIncompatible
@ElementTypesAreNonnullByDefault
final class DoubleUtils {
  private DoubleUtils() {}

  static double nextDown(double d) {
    return -Math.nextUp(-d);
  }

  // The mask for the significand, according to the {@link
  // Double#doubleToRawLongBits(double)} spec.
  static final long SIGNIFICAND_MASK = 0x000fffffffffffffL;

				return nil, fmt.Errorf("internal error: preexisting COMDAT definition for %q", name)
			}
			comdatDefinitions[l.SymName(s)] = sz
		}
	}

	// Sort outer lists by address, adding to textp.
	// This keeps textp in increasing address order.
	for _, sect := range f.Sections {
		s := state.sectsyms[sect]
		if s == 0 {
			continue
		}
		l.SortSub(s)

        return (cmpXToRoundArbitrarily <= 0) ? roundArbitrarily : Math.nextUp(roundArbitrarily);
      case DOWN:
        if (x >= 0) {
          return (cmpXToRoundArbitrarily >= 0)
              ? roundArbitrarily
              : DoubleUtils.nextDown(roundArbitrarily);
        } else {
          return (cmpXToRoundArbitrarily <= 0) ? roundArbitrarily : Math.nextUp(roundArbitrarily);
        }
      case UP:

    new RoundToDoubleTester(BigInteger.valueOf((1L << 53) + 1))
        .setExpectation(twoToThe53, DOWN, FLOOR, HALF_DOWN, HALF_EVEN)
        .setExpectation(Math.nextUp(twoToThe53), CEILING, UP, HALF_UP)
        .roundUnnecessaryShouldThrow()
        .test();
  }

  @J2ktIncompatible
  @GwtIncompatible
  public void testRoundToDouble_twoToThe54PlusOne() {

	// to produce a good error message.
	//
	// This accumulates stack heights bottom-up so it only has to
	// visit every function once.
	var failed []loader.Sym
	for _, s := range ctxt.Textp {
		if sc.check(s) > limit {
			failed = append(failed, s)
		}
	}

	if len(failed) > 0 {
		// Something was over-limit, so now we do the more
		// expensive work to report a good error. First, for

	Loaded bool // set after all inputs have been loaded as symbols

	compressDWARF bool

	Libdir       []string
	Library      []*sym.Library
	LibraryByPkg map[string]*sym.Library
	Shlibs       []Shlib
	Textp        []loader.Sym
	Moduledata   loader.Sym

	PackageFile  map[string]string
	PackageShlib map[string]string

	tramps []loader.Sym // trampolines

	compUnits []*sym.CompilationUnit // DWARF compilation units

	v := a[0]
	if v.Op == shiftOp {
		v = v.Args[0]
	}
	var extOp Op
	if orOp == OpOr64 && (v.Op == OpZeroExt8to64 || v.Op == OpZeroExt16to64 || v.Op == OpZeroExt32to64) ||
		orOp == OpOr32 && (v.Op == OpZeroExt8to32 || v.Op == OpZeroExt16to32) ||
		orOp == OpOr16 && v.Op == OpZeroExt8to16 {
		extOp = v.Op
		v = v.Args[0]
	} else {
		return false
	}
	if v.Op != OpLoad {
		return false