type Numeric interface {
	~int | ~int8 | ~int16 | ~int32 | ~int64
}

// numericAbs matches numeric types with an Abs method.
type numericAbs[T Numeric] interface {
	~struct{ Value T }
	Abs() T
}

// AbsDifference computes the absolute value of the difference of
// a and b, where the absolute value is determined by the Abs method.
func absDifference[T numericAbs[T /* ERROR "T does not satisfy Numeric" */]](a, b T) T {

	r.prevRune = -1
	var abs int64
	switch whence {
	case io.SeekStart:
		abs = offset
	case io.SeekCurrent:
		abs = r.i + offset
	case io.SeekEnd:
		abs = int64(len(r.s)) + offset
	default:
		return 0, errors.New("strings.Reader.Seek: invalid whence")
	}
	if abs < 0 {
		return 0, errors.New("strings.Reader.Seek: negative position")
	}
	r.i = abs
	return abs, nil
}

  // CHECK: %[[Q1:.*]] = stablehlo.uniform_quantize %[[ARG0]]
  // CHECK: %[[Q2:.*]] = stablehlo.uniform_quantize %[[Q1]]
  // CHECK: %[[ABS:.*]] = stablehlo.abs %[[Q2]]
  // CHECK: %[[DQ:.*]] = stablehlo.uniform_dequantize %[[ABS]]
  // CHECK: %[[ADD:.*]] = stablehlo.add %[[ARG0]], %[[DQ]]
  // CHECK: return %[[ADD]]

	if timekeepSharedPage == nil || timekeepSharedPage.ver != _VDSO_TK_VER_CURR {
		return zeroBintime
	}
	abs := false
	switch clockID {
	case _CLOCK_MONOTONIC:
		/* ok */
	case _CLOCK_REALTIME:
		abs = true
	default:
		return zeroBintime
	}
	return binuptime(abs)
}

func fallback_nanotime() int64
func fallback_walltime() (sec int64, nsec int32)

//go:nosplit
func nanotime1() int64 {

    19: 0000000000000000     0 FILE    LOCAL  DEFAULT  ABS sum.cpp
    20: 0000000000000000     0 FILE    LOCAL  DEFAULT  ABS multiply.cpp
    21: 0000000000000000     0 FILE    LOCAL  DEFAULT  ABS crtstuff.c
    22: 00000000004021e0     0 OBJECT  LOCAL  DEFAULT   19 __FRAME_END__
    23: 0000000000000000     0 FILE    LOCAL  DEFAULT  ABS
    24: 0000000000402014     0 NOTYPE  LOCAL  DEFAULT   18 __GNU_EH_FRAME_HDR

	_ = x.ForM // ERROR "x.ForM undefined (type *big.Float has no field or method ForM)"

	_ = x.abs  // ERROR "x.abs undefined (type *big.Float has no field or method abs, but does have method Abs)"
	_ = x.abS  // ERROR "x.abS undefined (type *big.Float has no field or method abS)"
	_ = x.form // ERROR "x.form undefined (cannot refer to unexported field form)"

	if n < 0 {
		panic("negative n for ProbablyPrime")
	}
	if x.neg || len(x.abs) == 0 {
		return false
	}

	// primeBitMask records the primes < 64.
	const primeBitMask uint64 = 1<<2 | 1<<3 | 1<<5 | 1<<7 |
		1<<11 | 1<<13 | 1<<17 | 1<<19 | 1<<23 | 1<<29 | 1<<31 |
		1<<37 | 1<<41 | 1<<43 | 1<<47 | 1<<53 | 1<<59 | 1<<61

	w := x.abs[0]
	if len(x.abs) == 1 && w < 64 {
		return primeBitMask&(1<<w) != 0
	}

	if w&1 == 0 {

            FilenameUtils.separatorsToSystem(absolutePath),
            FilenameUtils.getName(absolutePath),
            TestHashCodes.hashCodeFrom(hashCode ?: pseudoRandom.nextLong()),
            file(abs(pseudoRandom.nextLong()), abs(pseudoRandom.nextLong()), accessType))
    }

    FileSystemLocationSnapshot missing(String absolutePath, FileMetadata.AccessType accessType = DIRECT) {
        new MissingFileSnapshot(
            absolutePath,

	// determine sign
	neg, err := scanSign(r)
	if err != nil {
		return nil, 0, err
	}

	// determine mantissa
	z.abs, base, _, err = z.abs.scan(r, base, false)
	if err != nil {
		return nil, base, err
	}
	z.neg = len(z.abs) > 0 && neg // 0 has no sign

	return z, base, nil
}

func scanSign(r io.ByteScanner) (neg bool, err error) {
	var ch byte

            def diff = currentVersionMean - thisVersionMean
            def desc = diff > Duration.millis(0) ? "slower" : "faster"
            sb.append("Difference: ${diff.abs().format()} $desc (${toMillis(diff.abs())}), ${PrettyCalculator.percentChange(currentVersionMean, thisVersionMean)}%\n")
            sb.append(current.speedStats)
            sb.append(results.speedStats)
            sb.append("\n")