var errOffset = errors.New("Seek: invalid offset")

func (s *SectionReader) Seek(offset int64, whence int) (int64, error) {
	switch whence {
	default:
		return 0, errWhence
	case SeekStart:
		offset += s.base
	case SeekCurrent:
		offset += s.off
	case SeekEnd:
		offset += s.limit
	}
	if offset < s.base {
		return 0, errOffset
	}
	s.off = offset
	return offset - s.base, nil
}

        if (startPosition * 2 >= windowSize) {
            int offset = params.getOffset();
            if (offset < 0) {
                offset = 0;
            } else if (offset > windowSize / 2) {
                offset = windowSize / 2;
            }
            int start = startPosition - offset;
            if (start < 0) {
                start = 0;
            }

	// Arm64.

	// Set a MOV[NZ] immediate field to bits [15:0] of the offset from the thread
	// local base to the thread local variable defined by the referenced (thread
	// local) symbol. Error if the offset does not fit into 16 bits.
	R_ARM64_TLS_LE

	// Relocates an ADRP; LD64 instruction sequence to load the offset between
	// the thread local base and the thread local variable defined by the

func (span *mspan) incPinCounter(offset uintptr) {
	var rec *specialPinCounter
	ref, exists := span.specialFindSplicePoint(offset, _KindSpecialPinCounter)
	if !exists {
		lock(&mheap_.speciallock)
		rec = (*specialPinCounter)(mheap_.specialPinCounterAlloc.alloc())
		unlock(&mheap_.speciallock)
		// splice in record, fill in offset.
		rec.special.offset = uint16(offset)
		rec.special.kind = _KindSpecialPinCounter

		// and adjust the offset.
		child.result[child.offset] = lenByte
		extraBytes := int(lenLen - 1)
		if extraBytes != 0 {
			child.add(make([]byte, extraBytes)...)
			childStart := child.offset + child.pendingLenLen
			copy(child.result[childStart+extraBytes:], child.result[childStart:])
		}
		child.offset++
		child.pendingLenLen = extraBytes
	}

	l := length

	// issue 67470
	{"-07", "-25", "time zone offset hour out of range"},
	{"-07:00", "+25:00", "time zone offset hour out of range"},
	{"-07:00", "-23:61", "time zone offset minute out of range"},
	{"-07:00:00", "+23:59:61", "time zone offset second out of range"},
	{"Z07", "-25", "time zone offset hour out of range"},
	{"Z07:00", "+25:00", "time zone offset hour out of range"},

		}
		offset := p.To.Offset
		p.As = mov
		p.From.Type = obj.TYPE_MEM
		p.From.Name = obj.NAME_GOTREF
		p.From.Sym = sym
		p.To.Type = obj.TYPE_REG
		p.To.Reg = reg
		p.To.Offset = 0
		p.To.Sym = nil
		p1 := obj.Appendp(p, newprog)
		p1.As = lea
		p1.From.Type = obj.TYPE_MEM
		p1.From.Offset = offset
		p1.From.Reg = reg
		p1.To.Type = obj.TYPE_REG

// types section.
type typeReader interface {
	Seek(Offset)
	Next() (*Entry, error)
	clone() typeReader
	offset() Offset
	// AddressSize returns the size in bytes of addresses in the current
	// compilation unit.
	AddressSize() int
}

// Type reads the type at off in the DWARF “info” section.
func (d *Data) Type(off Offset) (Type, error) {
	return d.readType("info", d.Reader(), off, d.typeCache, nil)

  %offset:4 = "tf.ConcatOffset"(%concat_dim, %shape0, %shape1, %shape2, %shape3) : (tensor<i32>, tensor<3xi32>, tensor<3xi32>, tensor<3xi32>, tensor<3xi32>) -> (tensor<3xi32>, tensor<3xi32>, tensor<3xi32>, tensor<3xi32>)

  // CHECK: return [[OFFSET_0]], [[OFFSET_0]], [[OFFSET_2]], [[OFFSET_3]]
  func.return %offset#0, %offset#1, %offset#2, %offset#3: tensor<3xi32>, tensor<3xi32>, tensor<3xi32>, tensor<3xi32>

	SymRdWr = SymRead | SymWrite

	SymNone SymEffect = 0
)

// A Sym represents a symbolic offset from a base register.
// Currently a Sym can be one of 3 things:
//   - a *gc.Node, for an offset from SP (the stack pointer)
//   - a *obj.LSym, for an offset from SB (the global pointer)
//   - nil, for no offset
type Sym interface {
	CanBeAnSSASym()
	CanBeAnSSAAux()
}