const maxNanoSecondDigits = 9

	// Split string into seconds and sub-seconds parts.
	ss, sn, _ := strings.Cut(s, ".")

	// Parse the seconds.
	secs, err := strconv.ParseInt(ss, 10, 64)
	if err != nil {
		return time.Time{}, ErrHeader
	}
	if len(sn) == 0 {
		return time.Unix(secs, 0), nil // No sub-second values
	}

	// Parse the nanoseconds.
	if strings.Trim(sn, "0123456789") != "" {

	SUBW R20.UXTW<<2, R23, R19                 // f34a344b
	SUB R5.SXTW<<2, R1, R26                    // 3ac825cb
	SUB $(1923<<12), R4, R27                   // SUB $7876608, R4, R27         // 9b0c5ed1
	SUBW $(1923<<12), R4, R27                  // SUBW $7876608, R4, R27        // 9b0c5e51
	SUBW R12<<29, R7, R8                       // e8740c4b
	SUB R12<<61, R7, R8                        // e8f40ccb

pkg debug/elf, const R_MIPS_SHIFT5 = 16
pkg debug/elf, const R_MIPS_SHIFT5 R_MIPS
pkg debug/elf, const R_MIPS_SHIFT6 = 17
pkg debug/elf, const R_MIPS_SHIFT6 R_MIPS
pkg debug/elf, const R_MIPS_SUB = 24
pkg debug/elf, const R_MIPS_SUB R_MIPS
pkg debug/elf, const R_MIPS_TLS_DTPMOD32 = 38
pkg debug/elf, const R_MIPS_TLS_DTPMOD32 R_MIPS
pkg debug/elf, const R_MIPS_TLS_DTPMOD64 = 40
pkg debug/elf, const R_MIPS_TLS_DTPMOD64 R_MIPS

	// to the nearest second and ignores the AccessTime and ChangeTime fields.
	//
	// To use AccessTime or ChangeTime, specify the Format as PAX or GNU.
	// To use sub-second resolution, specify the Format as PAX.
	ModTime    time.Time // Modification time
	AccessTime time.Time // Access time (requires either PAX or GNU support)

//	ChangeTime        |    n/a | unlimited |     int89
//	Devmajor/Devminor | uint21 |    uint21 |    uint57
//	------------------+--------+-----------+----------
//	string encoding   |  ASCII |     UTF-8 |    binary
//	sub-second times  |     no |       yes |        no
//	sparse files      |     no |       yes |       yes
//
// The table's upper portion shows the [Header] fields, where each format reports

pkg debug/elf, const SHT_SYMTAB_SHNDX SectionType
pkg debug/elf, const STB_GLOBAL SymBind
pkg debug/elf, const STB_HIOS SymBind
pkg debug/elf, const STB_HIPROC SymBind
pkg debug/elf, const STB_LOCAL SymBind
pkg debug/elf, const STB_LOOS SymBind
pkg debug/elf, const STB_LOPROC SymBind
pkg debug/elf, const STB_WEAK SymBind
pkg debug/elf, const STT_COMMON SymType
pkg debug/elf, const STT_FILE SymType

pkg io/fs, type StatFS interface, Open(string) (File, error)
pkg io/fs, type StatFS interface, Stat(string) (FileInfo, error)
pkg io/fs, type SubFS interface { Open, Sub }
pkg io/fs, type SubFS interface, Open(string) (File, error)
pkg io/fs, type SubFS interface, Sub(string) (FS, error)
pkg io/fs, type WalkDirFunc func(string, DirEntry, error) error
pkg io/fs, var ErrClosed error
pkg io/fs, var ErrExist error

parseExtras:
	for extra := readBuf(f.Extra); len(extra) >= 4; { // need at least tag and size
		fieldTag := extra.uint16()
		fieldSize := int(extra.uint16())
		if len(extra) < fieldSize {
			break
		}
		fieldBuf := extra.sub(fieldSize)

		switch fieldTag {
		case zip64ExtraID:
			f.zip64 = true

			// update directory values from the zip64 extra block.
			// They should only be consulted if the sizes read earlier

pkg syscall (freebsd-arm64), const BPF_ST ideal-int
pkg syscall (freebsd-arm64), const BPF_STX = 3
pkg syscall (freebsd-arm64), const BPF_STX ideal-int
pkg syscall (freebsd-arm64), const BPF_SUB = 16
pkg syscall (freebsd-arm64), const BPF_SUB ideal-int
pkg syscall (freebsd-arm64), const BPF_T_BINTIME = 2
pkg syscall (freebsd-arm64), const BPF_T_BINTIME ideal-int
pkg syscall (freebsd-arm64), const BPF_T_BINTIME_FAST = 258

	EQV R3, R4, R5                  // 7c851a38
	EQVCC R3, R4, R5                // 7c851a39
	NOR R3, R4, R5                  // 7c8518f8
	NORCC R3, R4, R5                // 7c8518f9

	SUB R3, R4                      // 7c832050
	SUB R3, R4, R5                  // 7ca32050
	SUBC R3, R4                     // 7c832010
	SUBC R3, R4, R5                 // 7ca32010
	SUBCC R3, R4, R5                // 7ca32051