// Automatically generated marshal implementation. See tools/go_marshal.

// If there are issues with build constraint aggregation, see
// tools/go_marshal/gomarshal/generator.go:writeHeader(). The constraints here
// come from the input set of files used to generate this file. This input set
// is filtered based on pre-defined file suffixes related to build constraints,
// see tools/defs.bzl:calculate_sets().

//go:build arm64 && arm64 && arm64 && arm64 && arm64
// +build arm64,arm64,arm64,arm64,arm64

package linux

import (
	"io"
	"reflect"
	"runtime"
	"unsafe"

	"github.com/sagernet/gvisor/pkg/gohacks"
	"github.com/sagernet/gvisor/pkg/hostarch"
	"github.com/sagernet/gvisor/pkg/marshal"
)

// Marshallable types used by this file.
var (
	_ marshal.Marshallable = (*EpollEvent)(nil)
	_ marshal.Marshallable = (*IPCPerm)(nil)
	_ marshal.Marshallable = (*PtraceRegs)(nil)
	_ marshal.Marshallable = (*SemidDS)(nil)
	_ marshal.Marshallable = (*Stat)(nil)
	_ marshal.Marshallable = (*TimeT)(nil)
	_ marshal.Marshallable = (*Timespec)(nil)
)

// SizeBytes implements marshal.Marshallable.SizeBytes.
func (e *EpollEvent) SizeBytes() int {
	return 8 +
		4*2
}

// MarshalBytes implements marshal.Marshallable.MarshalBytes.
func (e *EpollEvent) MarshalBytes(dst []byte) []byte {
	hostarch.ByteOrder.PutUint32(dst[:4], uint32(e.Events))
	dst = dst[4:]
	// Padding: dst[:sizeof(int32)] ~= int32(0)
	dst = dst[4:]
	for idx := 0; idx < 2; idx++ {
		hostarch.ByteOrder.PutUint32(dst[:4], uint32(e.Data[idx]))
		dst = dst[4:]
	}
	return dst
}

// UnmarshalBytes implements marshal.Marshallable.UnmarshalBytes.
func (e *EpollEvent) UnmarshalBytes(src []byte) []byte {
	e.Events = uint32(hostarch.ByteOrder.Uint32(src[:4]))
	src = src[4:]
	// Padding: var _ int32 ~= src[:sizeof(int32)]
	src = src[4:]
	for idx := 0; idx < 2; idx++ {
		e.Data[idx] = int32(hostarch.ByteOrder.Uint32(src[:4]))
		src = src[4:]
	}
	return src
}

// Packed implements marshal.Marshallable.Packed.
//
//go:nosplit
func (e *EpollEvent) Packed() bool {
	return true
}

// MarshalUnsafe implements marshal.Marshallable.MarshalUnsafe.
func (e *EpollEvent) MarshalUnsafe(dst []byte) []byte {
	size := e.SizeBytes()
	gohacks.Memmove(unsafe.Pointer(&dst[0]), unsafe.Pointer(e), uintptr(size))
	return dst[size:]
}

// UnmarshalUnsafe implements marshal.Marshallable.UnmarshalUnsafe.
func (e *EpollEvent) UnmarshalUnsafe(src []byte) []byte {
	size := e.SizeBytes()
	gohacks.Memmove(unsafe.Pointer(e), unsafe.Pointer(&src[0]), uintptr(size))
	return src[size:]
}

// CopyOutN implements marshal.Marshallable.CopyOutN.
func (e *EpollEvent) CopyOutN(cc marshal.CopyContext, addr hostarch.Addr, limit int) (int, error) {
	// Construct a slice backed by dst's underlying memory.
	var buf []byte
	hdr := (*reflect.SliceHeader)(unsafe.Pointer(&buf))
	hdr.Data = uintptr(gohacks.Noescape(unsafe.Pointer(e)))
	hdr.Len = e.SizeBytes()
	hdr.Cap = e.SizeBytes()

	length, err := cc.CopyOutBytes(addr, buf[:limit]) // escapes: okay.
	// Since we bypassed the compiler's escape analysis, indicate that e
	// must live until the use above.
	runtime.KeepAlive(e) // escapes: replaced by intrinsic.
	return length, err
}

// CopyOut implements marshal.Marshallable.CopyOut.
func (e *EpollEvent) CopyOut(cc marshal.CopyContext, addr hostarch.Addr) (int, error) {
	return e.CopyOutN(cc, addr, e.SizeBytes())
}

// CopyInN implements marshal.Marshallable.CopyInN.
func (e *EpollEvent) CopyInN(cc marshal.CopyContext, addr hostarch.Addr, limit int) (int, error) {
	// Construct a slice backed by dst's underlying memory.
	var buf []byte
	hdr := (*reflect.SliceHeader)(unsafe.Pointer(&buf))
	hdr.Data = uintptr(gohacks.Noescape(unsafe.Pointer(e)))
	hdr.Len = e.SizeBytes()
	hdr.Cap = e.SizeBytes()

	length, err := cc.CopyInBytes(addr, buf[:limit]) // escapes: okay.
	// Since we bypassed the compiler's escape analysis, indicate that e
	// must live until the use above.
	runtime.KeepAlive(e) // escapes: replaced by intrinsic.
	return length, err
}

// CopyIn implements marshal.Marshallable.CopyIn.
func (e *EpollEvent) CopyIn(cc marshal.CopyContext, addr hostarch.Addr) (int, error) {
	return e.CopyInN(cc, addr, e.SizeBytes())
}

// WriteTo implements io.WriterTo.WriteTo.
func (e *EpollEvent) WriteTo(writer io.Writer) (int64, error) {
	// Construct a slice backed by dst's underlying memory.
	var buf []byte
	hdr := (*reflect.SliceHeader)(unsafe.Pointer(&buf))
	hdr.Data = uintptr(gohacks.Noescape(unsafe.Pointer(e)))
	hdr.Len = e.SizeBytes()
	hdr.Cap = e.SizeBytes()

	length, err := writer.Write(buf)
	// Since we bypassed the compiler's escape analysis, indicate that e
	// must live until the use above.
	runtime.KeepAlive(e) // escapes: replaced by intrinsic.
	return int64(length), err
}

// CopyEpollEventSliceIn copies in a slice of EpollEvent objects from the task's memory.
func CopyEpollEventSliceIn(cc marshal.CopyContext, addr hostarch.Addr, dst []EpollEvent) (int, error) {
	count := len(dst)
	if count == 0 {
		return 0, nil
	}
	size := (*EpollEvent)(nil).SizeBytes()

	ptr := unsafe.Pointer(&dst)
	val := gohacks.Noescape(unsafe.Pointer((*reflect.SliceHeader)(ptr).Data))

	// Construct a slice backed by dst's underlying memory.
	var buf []byte
	hdr := (*reflect.SliceHeader)(unsafe.Pointer(&buf))
	hdr.Data = uintptr(val)
	hdr.Len = size * count
	hdr.Cap = size * count

	length, err := cc.CopyInBytes(addr, buf)
	// Since we bypassed the compiler's escape analysis, indicate that dst
	// must live until the use above.
	runtime.KeepAlive(dst) // escapes: replaced by intrinsic.
	return length, err
}

// CopyEpollEventSliceOut copies a slice of EpollEvent objects to the task's memory.
func CopyEpollEventSliceOut(cc marshal.CopyContext, addr hostarch.Addr, src []EpollEvent) (int, error) {
	count := len(src)
	if count == 0 {
		return 0, nil
	}
	size := (*EpollEvent)(nil).SizeBytes()

	ptr := unsafe.Pointer(&src)
	val := gohacks.Noescape(unsafe.Pointer((*reflect.SliceHeader)(ptr).Data))

	// Construct a slice backed by dst's underlying memory.
	var buf []byte
	hdr := (*reflect.SliceHeader)(unsafe.Pointer(&buf))
	hdr.Data = uintptr(val)
	hdr.Len = size * count
	hdr.Cap = size * count

	length, err := cc.CopyOutBytes(addr, buf)
	// Since we bypassed the compiler's escape analysis, indicate that src
	// must live until the use above.
	runtime.KeepAlive(src) // escapes: replaced by intrinsic.
	return length, err
}

// MarshalUnsafeEpollEventSlice is like EpollEvent.MarshalUnsafe, but for a []EpollEvent.
func MarshalUnsafeEpollEventSlice(src []EpollEvent, dst []byte) []byte {
	count := len(src)
	if count == 0 {
		return dst
	}

	size := (*EpollEvent)(nil).SizeBytes()
	buf := dst[:size*count]
	gohacks.Memmove(unsafe.Pointer(&buf[0]), unsafe.Pointer(&src[0]), uintptr(len(buf)))
	return dst[size*count:]
}

// UnmarshalUnsafeEpollEventSlice is like EpollEvent.UnmarshalUnsafe, but for a []EpollEvent.
func UnmarshalUnsafeEpollEventSlice(dst []EpollEvent, src []byte) []byte {
	count := len(dst)
	if count == 0 {
		return src
	}

	size := (*EpollEvent)(nil).SizeBytes()
	buf := src[:size*count]
	gohacks.Memmove(unsafe.Pointer(&dst[0]), unsafe.Pointer(&buf[0]), uintptr(len(buf)))
	return src[size*count:]
}

// SizeBytes implements marshal.Marshallable.SizeBytes.
func (s *Stat) SizeBytes() int {
	return 72 +
		(*Timespec)(nil).SizeBytes() +
		(*Timespec)(nil).SizeBytes() +
		(*Timespec)(nil).SizeBytes() +
		4*2
}

// MarshalBytes implements marshal.Marshallable.MarshalBytes.
func (s *Stat) MarshalBytes(dst []byte) []byte {
	hostarch.ByteOrder.PutUint64(dst[:8], uint64(s.Dev))
	dst = dst[8:]
	hostarch.ByteOrder.PutUint64(dst[:8], uint64(s.Ino))
	dst = dst[8:]
	hostarch.ByteOrder.PutUint32(dst[:4], uint32(s.Mode))
	dst = dst[4:]
	hostarch.ByteOrder.PutUint32(dst[:4], uint32(s.Nlink))
	dst = dst[4:]
	hostarch.ByteOrder.PutUint32(dst[:4], uint32(s.UID))
	dst = dst[4:]
	hostarch.ByteOrder.PutUint32(dst[:4], uint32(s.GID))
	dst = dst[4:]
	hostarch.ByteOrder.PutUint64(dst[:8], uint64(s.Rdev))
	dst = dst[8:]
	// Padding: dst[:sizeof(uint64)] ~= uint64(0)
	dst = dst[8:]
	hostarch.ByteOrder.PutUint64(dst[:8], uint64(s.Size))
	dst = dst[8:]
	hostarch.ByteOrder.PutUint32(dst[:4], uint32(s.Blksize))
	dst = dst[4:]
	// Padding: dst[:sizeof(int32)] ~= int32(0)
	dst = dst[4:]
	hostarch.ByteOrder.PutUint64(dst[:8], uint64(s.Blocks))
	dst = dst[8:]
	dst = s.ATime.MarshalUnsafe(dst)
	dst = s.MTime.MarshalUnsafe(dst)
	dst = s.CTime.MarshalUnsafe(dst)
	// Padding: dst[:sizeof(int32)*2] ~= [2]int32{0}
	dst = dst[4*(2):]
	return dst
}

// UnmarshalBytes implements marshal.Marshallable.UnmarshalBytes.
func (s *Stat) UnmarshalBytes(src []byte) []byte {
	s.Dev = uint64(hostarch.ByteOrder.Uint64(src[:8]))
	src = src[8:]
	s.Ino = uint64(hostarch.ByteOrder.Uint64(src[:8]))
	src = src[8:]
	s.Mode = uint32(hostarch.ByteOrder.Uint32(src[:4]))
	src = src[4:]
	s.Nlink = uint32(hostarch.ByteOrder.Uint32(src[:4]))
	src = src[4:]
	s.UID = uint32(hostarch.ByteOrder.Uint32(src[:4]))
	src = src[4:]
	s.GID = uint32(hostarch.ByteOrder.Uint32(src[:4]))
	src = src[4:]
	s.Rdev = uint64(hostarch.ByteOrder.Uint64(src[:8]))
	src = src[8:]
	// Padding: var _ uint64 ~= src[:sizeof(uint64)]
	src = src[8:]
	s.Size = int64(hostarch.ByteOrder.Uint64(src[:8]))
	src = src[8:]
	s.Blksize = int32(hostarch.ByteOrder.Uint32(src[:4]))
	src = src[4:]
	// Padding: var _ int32 ~= src[:sizeof(int32)]
	src = src[4:]
	s.Blocks = int64(hostarch.ByteOrder.Uint64(src[:8]))
	src = src[8:]
	src = s.ATime.UnmarshalUnsafe(src)
	src = s.MTime.UnmarshalUnsafe(src)
	src = s.CTime.UnmarshalUnsafe(src)
	// Padding: ~ copy([2]int32(s._), src[:sizeof(int32)*2])
	src = src[4*(2):]
	return src
}

// Packed implements marshal.Marshallable.Packed.
//
//go:nosplit
func (s *Stat) Packed() bool {
	return s.ATime.Packed() && s.CTime.Packed() && s.MTime.Packed()
}

// MarshalUnsafe implements marshal.Marshallable.MarshalUnsafe.
func (s *Stat) MarshalUnsafe(dst []byte) []byte {
	if s.ATime.Packed() && s.CTime.Packed() && s.MTime.Packed() {
		size := s.SizeBytes()
		gohacks.Memmove(unsafe.Pointer(&dst[0]), unsafe.Pointer(s), uintptr(size))
		return dst[size:]
	}
	// Type Stat doesn't have a packed layout in memory, fallback to MarshalBytes.
	return s.MarshalBytes(dst)
}

// UnmarshalUnsafe implements marshal.Marshallable.UnmarshalUnsafe.
func (s *Stat) UnmarshalUnsafe(src []byte) []byte {
	if s.ATime.Packed() && s.CTime.Packed() && s.MTime.Packed() {
		size := s.SizeBytes()
		gohacks.Memmove(unsafe.Pointer(s), unsafe.Pointer(&src[0]), uintptr(size))
		return src[size:]
	}
	// Type Stat doesn't have a packed layout in memory, fallback to UnmarshalBytes.
	return s.UnmarshalBytes(src)
}

// CopyOutN implements marshal.Marshallable.CopyOutN.
func (s *Stat) CopyOutN(cc marshal.CopyContext, addr hostarch.Addr, limit int) (int, error) {
	if !s.ATime.Packed() && s.CTime.Packed() && s.MTime.Packed() {
		// Type Stat doesn't have a packed layout in memory, fall back to MarshalBytes.
		buf := cc.CopyScratchBuffer(s.SizeBytes()) // escapes: okay.
		s.MarshalBytes(buf)                        // escapes: fallback.
		return cc.CopyOutBytes(addr, buf[:limit])  // escapes: okay.
	}

	// Construct a slice backed by dst's underlying memory.
	var buf []byte
	hdr := (*reflect.SliceHeader)(unsafe.Pointer(&buf))
	hdr.Data = uintptr(gohacks.Noescape(unsafe.Pointer(s)))
	hdr.Len = s.SizeBytes()
	hdr.Cap = s.SizeBytes()

	length, err := cc.CopyOutBytes(addr, buf[:limit]) // escapes: okay.
	// Since we bypassed the compiler's escape analysis, indicate that s
	// must live until the use above.
	runtime.KeepAlive(s) // escapes: replaced by intrinsic.
	return length, err
}

// CopyOut implements marshal.Marshallable.CopyOut.
func (s *Stat) CopyOut(cc marshal.CopyContext, addr hostarch.Addr) (int, error) {
	return s.CopyOutN(cc, addr, s.SizeBytes())
}

// CopyInN implements marshal.Marshallable.CopyInN.
func (s *Stat) CopyInN(cc marshal.CopyContext, addr hostarch.Addr, limit int) (int, error) {
	if !s.ATime.Packed() && s.CTime.Packed() && s.MTime.Packed() {
		// Type Stat doesn't have a packed layout in memory, fall back to UnmarshalBytes.
		buf := cc.CopyScratchBuffer(s.SizeBytes())       // escapes: okay.
		length, err := cc.CopyInBytes(addr, buf[:limit]) // escapes: okay.
		// Unmarshal unconditionally. If we had a short copy-in, this results in a
		// partially unmarshalled struct.
		s.UnmarshalBytes(buf) // escapes: fallback.
		return length, err
	}

	// Construct a slice backed by dst's underlying memory.
	var buf []byte
	hdr := (*reflect.SliceHeader)(unsafe.Pointer(&buf))
	hdr.Data = uintptr(gohacks.Noescape(unsafe.Pointer(s)))
	hdr.Len = s.SizeBytes()
	hdr.Cap = s.SizeBytes()

	length, err := cc.CopyInBytes(addr, buf[:limit]) // escapes: okay.
	// Since we bypassed the compiler's escape analysis, indicate that s
	// must live until the use above.
	runtime.KeepAlive(s) // escapes: replaced by intrinsic.
	return length, err
}

// CopyIn implements marshal.Marshallable.CopyIn.
func (s *Stat) CopyIn(cc marshal.CopyContext, addr hostarch.Addr) (int, error) {
	return s.CopyInN(cc, addr, s.SizeBytes())
}

// WriteTo implements io.WriterTo.WriteTo.
func (s *Stat) WriteTo(writer io.Writer) (int64, error) {
	if !s.ATime.Packed() && s.CTime.Packed() && s.MTime.Packed() {
		// Type Stat doesn't have a packed layout in memory, fall back to MarshalBytes.
		buf := make([]byte, s.SizeBytes())
		s.MarshalBytes(buf)
		length, err := writer.Write(buf)
		return int64(length), err
	}

	// Construct a slice backed by dst's underlying memory.
	var buf []byte
	hdr := (*reflect.SliceHeader)(unsafe.Pointer(&buf))
	hdr.Data = uintptr(gohacks.Noescape(unsafe.Pointer(s)))
	hdr.Len = s.SizeBytes()
	hdr.Cap = s.SizeBytes()

	length, err := writer.Write(buf)
	// Since we bypassed the compiler's escape analysis, indicate that s
	// must live until the use above.
	runtime.KeepAlive(s) // escapes: replaced by intrinsic.
	return int64(length), err
}

// SizeBytes implements marshal.Marshallable.SizeBytes.
func (p *PtraceRegs) SizeBytes() int {
	return 24 +
		8*31
}

// MarshalBytes implements marshal.Marshallable.MarshalBytes.
func (p *PtraceRegs) MarshalBytes(dst []byte) []byte {
	for idx := 0; idx < 31; idx++ {
		hostarch.ByteOrder.PutUint64(dst[:8], uint64(p.Regs[idx]))
		dst = dst[8:]
	}
	hostarch.ByteOrder.PutUint64(dst[:8], uint64(p.Sp))
	dst = dst[8:]
	hostarch.ByteOrder.PutUint64(dst[:8], uint64(p.Pc))
	dst = dst[8:]
	hostarch.ByteOrder.PutUint64(dst[:8], uint64(p.Pstate))
	dst = dst[8:]
	return dst
}

// UnmarshalBytes implements marshal.Marshallable.UnmarshalBytes.
func (p *PtraceRegs) UnmarshalBytes(src []byte) []byte {
	for idx := 0; idx < 31; idx++ {
		p.Regs[idx] = uint64(hostarch.ByteOrder.Uint64(src[:8]))
		src = src[8:]
	}
	p.Sp = uint64(hostarch.ByteOrder.Uint64(src[:8]))
	src = src[8:]
	p.Pc = uint64(hostarch.ByteOrder.Uint64(src[:8]))
	src = src[8:]
	p.Pstate = uint64(hostarch.ByteOrder.Uint64(src[:8]))
	src = src[8:]
	return src
}

// Packed implements marshal.Marshallable.Packed.
//
//go:nosplit
func (p *PtraceRegs) Packed() bool {
	return true
}

// MarshalUnsafe implements marshal.Marshallable.MarshalUnsafe.
func (p *PtraceRegs) MarshalUnsafe(dst []byte) []byte {
	size := p.SizeBytes()
	gohacks.Memmove(unsafe.Pointer(&dst[0]), unsafe.Pointer(p), uintptr(size))
	return dst[size:]
}

// UnmarshalUnsafe implements marshal.Marshallable.UnmarshalUnsafe.
func (p *PtraceRegs) UnmarshalUnsafe(src []byte) []byte {
	size := p.SizeBytes()
	gohacks.Memmove(unsafe.Pointer(p), unsafe.Pointer(&src[0]), uintptr(size))
	return src[size:]
}

// CopyOutN implements marshal.Marshallable.CopyOutN.
func (p *PtraceRegs) CopyOutN(cc marshal.CopyContext, addr hostarch.Addr, limit int) (int, error) {
	// Construct a slice backed by dst's underlying memory.
	var buf []byte
	hdr := (*reflect.SliceHeader)(unsafe.Pointer(&buf))
	hdr.Data = uintptr(gohacks.Noescape(unsafe.Pointer(p)))
	hdr.Len = p.SizeBytes()
	hdr.Cap = p.SizeBytes()

	length, err := cc.CopyOutBytes(addr, buf[:limit]) // escapes: okay.
	// Since we bypassed the compiler's escape analysis, indicate that p
	// must live until the use above.
	runtime.KeepAlive(p) // escapes: replaced by intrinsic.
	return length, err
}

// CopyOut implements marshal.Marshallable.CopyOut.
func (p *PtraceRegs) CopyOut(cc marshal.CopyContext, addr hostarch.Addr) (int, error) {
	return p.CopyOutN(cc, addr, p.SizeBytes())
}

// CopyInN implements marshal.Marshallable.CopyInN.
func (p *PtraceRegs) CopyInN(cc marshal.CopyContext, addr hostarch.Addr, limit int) (int, error) {
	// Construct a slice backed by dst's underlying memory.
	var buf []byte
	hdr := (*reflect.SliceHeader)(unsafe.Pointer(&buf))
	hdr.Data = uintptr(gohacks.Noescape(unsafe.Pointer(p)))
	hdr.Len = p.SizeBytes()
	hdr.Cap = p.SizeBytes()

	length, err := cc.CopyInBytes(addr, buf[:limit]) // escapes: okay.
	// Since we bypassed the compiler's escape analysis, indicate that p
	// must live until the use above.
	runtime.KeepAlive(p) // escapes: replaced by intrinsic.
	return length, err
}

// CopyIn implements marshal.Marshallable.CopyIn.
func (p *PtraceRegs) CopyIn(cc marshal.CopyContext, addr hostarch.Addr) (int, error) {
	return p.CopyInN(cc, addr, p.SizeBytes())
}

// WriteTo implements io.WriterTo.WriteTo.
func (p *PtraceRegs) WriteTo(writer io.Writer) (int64, error) {
	// Construct a slice backed by dst's underlying memory.
	var buf []byte
	hdr := (*reflect.SliceHeader)(unsafe.Pointer(&buf))
	hdr.Data = uintptr(gohacks.Noescape(unsafe.Pointer(p)))
	hdr.Len = p.SizeBytes()
	hdr.Cap = p.SizeBytes()

	length, err := writer.Write(buf)
	// Since we bypassed the compiler's escape analysis, indicate that p
	// must live until the use above.
	runtime.KeepAlive(p) // escapes: replaced by intrinsic.
	return int64(length), err
}

// SizeBytes implements marshal.Marshallable.SizeBytes.
func (s *SemidDS) SizeBytes() int {
	return 24 +
		(*IPCPerm)(nil).SizeBytes() +
		(*TimeT)(nil).SizeBytes() +
		(*TimeT)(nil).SizeBytes()
}

// MarshalBytes implements marshal.Marshallable.MarshalBytes.
func (s *SemidDS) MarshalBytes(dst []byte) []byte {
	dst = s.SemPerm.MarshalUnsafe(dst)
	dst = s.SemOTime.MarshalUnsafe(dst)
	dst = s.SemCTime.MarshalUnsafe(dst)
	hostarch.ByteOrder.PutUint64(dst[:8], uint64(s.SemNSems))
	dst = dst[8:]
	hostarch.ByteOrder.PutUint64(dst[:8], uint64(s.unused3))
	dst = dst[8:]
	hostarch.ByteOrder.PutUint64(dst[:8], uint64(s.unused4))
	dst = dst[8:]
	return dst
}

// UnmarshalBytes implements marshal.Marshallable.UnmarshalBytes.
func (s *SemidDS) UnmarshalBytes(src []byte) []byte {
	src = s.SemPerm.UnmarshalUnsafe(src)
	src = s.SemOTime.UnmarshalUnsafe(src)
	src = s.SemCTime.UnmarshalUnsafe(src)
	s.SemNSems = uint64(hostarch.ByteOrder.Uint64(src[:8]))
	src = src[8:]
	s.unused3 = uint64(hostarch.ByteOrder.Uint64(src[:8]))
	src = src[8:]
	s.unused4 = uint64(hostarch.ByteOrder.Uint64(src[:8]))
	src = src[8:]
	return src
}

// Packed implements marshal.Marshallable.Packed.
//
//go:nosplit
func (s *SemidDS) Packed() bool {
	return s.SemCTime.Packed() && s.SemOTime.Packed() && s.SemPerm.Packed()
}

// MarshalUnsafe implements marshal.Marshallable.MarshalUnsafe.
func (s *SemidDS) MarshalUnsafe(dst []byte) []byte {
	if s.SemCTime.Packed() && s.SemOTime.Packed() && s.SemPerm.Packed() {
		size := s.SizeBytes()
		gohacks.Memmove(unsafe.Pointer(&dst[0]), unsafe.Pointer(s), uintptr(size))
		return dst[size:]
	}
	// Type SemidDS doesn't have a packed layout in memory, fallback to MarshalBytes.
	return s.MarshalBytes(dst)
}

// UnmarshalUnsafe implements marshal.Marshallable.UnmarshalUnsafe.
func (s *SemidDS) UnmarshalUnsafe(src []byte) []byte {
	if s.SemCTime.Packed() && s.SemOTime.Packed() && s.SemPerm.Packed() {
		size := s.SizeBytes()
		gohacks.Memmove(unsafe.Pointer(s), unsafe.Pointer(&src[0]), uintptr(size))
		return src[size:]
	}
	// Type SemidDS doesn't have a packed layout in memory, fallback to UnmarshalBytes.
	return s.UnmarshalBytes(src)
}

// CopyOutN implements marshal.Marshallable.CopyOutN.
func (s *SemidDS) CopyOutN(cc marshal.CopyContext, addr hostarch.Addr, limit int) (int, error) {
	if !s.SemCTime.Packed() && s.SemOTime.Packed() && s.SemPerm.Packed() {
		// Type SemidDS doesn't have a packed layout in memory, fall back to MarshalBytes.
		buf := cc.CopyScratchBuffer(s.SizeBytes()) // escapes: okay.
		s.MarshalBytes(buf)                        // escapes: fallback.
		return cc.CopyOutBytes(addr, buf[:limit])  // escapes: okay.
	}

	// Construct a slice backed by dst's underlying memory.
	var buf []byte
	hdr := (*reflect.SliceHeader)(unsafe.Pointer(&buf))
	hdr.Data = uintptr(gohacks.Noescape(unsafe.Pointer(s)))
	hdr.Len = s.SizeBytes()
	hdr.Cap = s.SizeBytes()

	length, err := cc.CopyOutBytes(addr, buf[:limit]) // escapes: okay.
	// Since we bypassed the compiler's escape analysis, indicate that s
	// must live until the use above.
	runtime.KeepAlive(s) // escapes: replaced by intrinsic.
	return length, err
}

// CopyOut implements marshal.Marshallable.CopyOut.
func (s *SemidDS) CopyOut(cc marshal.CopyContext, addr hostarch.Addr) (int, error) {
	return s.CopyOutN(cc, addr, s.SizeBytes())
}

// CopyInN implements marshal.Marshallable.CopyInN.
func (s *SemidDS) CopyInN(cc marshal.CopyContext, addr hostarch.Addr, limit int) (int, error) {
	if !s.SemCTime.Packed() && s.SemOTime.Packed() && s.SemPerm.Packed() {
		// Type SemidDS doesn't have a packed layout in memory, fall back to UnmarshalBytes.
		buf := cc.CopyScratchBuffer(s.SizeBytes())       // escapes: okay.
		length, err := cc.CopyInBytes(addr, buf[:limit]) // escapes: okay.
		// Unmarshal unconditionally. If we had a short copy-in, this results in a
		// partially unmarshalled struct.
		s.UnmarshalBytes(buf) // escapes: fallback.
		return length, err
	}

	// Construct a slice backed by dst's underlying memory.
	var buf []byte
	hdr := (*reflect.SliceHeader)(unsafe.Pointer(&buf))
	hdr.Data = uintptr(gohacks.Noescape(unsafe.Pointer(s)))
	hdr.Len = s.SizeBytes()
	hdr.Cap = s.SizeBytes()

	length, err := cc.CopyInBytes(addr, buf[:limit]) // escapes: okay.
	// Since we bypassed the compiler's escape analysis, indicate that s
	// must live until the use above.
	runtime.KeepAlive(s) // escapes: replaced by intrinsic.
	return length, err
}

// CopyIn implements marshal.Marshallable.CopyIn.
func (s *SemidDS) CopyIn(cc marshal.CopyContext, addr hostarch.Addr) (int, error) {
	return s.CopyInN(cc, addr, s.SizeBytes())
}

// WriteTo implements io.WriterTo.WriteTo.
func (s *SemidDS) WriteTo(writer io.Writer) (int64, error) {
	if !s.SemCTime.Packed() && s.SemOTime.Packed() && s.SemPerm.Packed() {
		// Type SemidDS doesn't have a packed layout in memory, fall back to MarshalBytes.
		buf := make([]byte, s.SizeBytes())
		s.MarshalBytes(buf)
		length, err := writer.Write(buf)
		return int64(length), err
	}

	// Construct a slice backed by dst's underlying memory.
	var buf []byte
	hdr := (*reflect.SliceHeader)(unsafe.Pointer(&buf))
	hdr.Data = uintptr(gohacks.Noescape(unsafe.Pointer(s)))
	hdr.Len = s.SizeBytes()
	hdr.Cap = s.SizeBytes()

	length, err := writer.Write(buf)
	// Since we bypassed the compiler's escape analysis, indicate that s
	// must live until the use above.
	runtime.KeepAlive(s) // escapes: replaced by intrinsic.
	return int64(length), err
}
