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

	<br>
	If <code>a<sub>i</sub></code> is an untyped constant <code>c<sub>j</sub></code>,
	and <code>typeof(p<sub>i</sub>)</code> is a bound type parameter <code>P<sub>k</sub></code>,
	the pair <code>(c<sub>j</sub>, P<sub>k</sub>)</code> is collected separately from
	the type equations.
	</p>
</li>
<li>
	<p>

	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)

	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

pkg math/bits, func Mul(uint, uint) (uint, uint)
pkg math/bits, func Mul32(uint32, uint32) (uint32, uint32)
pkg math/bits, func Mul64(uint64, uint64) (uint64, uint64)
pkg math/bits, func Sub(uint, uint, uint) (uint, uint)
pkg math/bits, func Sub32(uint32, uint32, uint32) (uint32, uint32)
pkg math/bits, func Sub64(uint64, uint64, uint64) (uint64, uint64)
pkg net/http, const StatusTooEarly = 425

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

pkg go/token, const SHL_ASSIGN Token
pkg go/token, const SHR Token
pkg go/token, const SHR_ASSIGN Token
pkg go/token, const STRING Token
pkg go/token, const STRUCT Token
pkg go/token, const SUB Token
pkg go/token, const SUB_ASSIGN Token
pkg go/token, const SWITCH Token
pkg go/token, const TYPE Token
pkg go/token, const UnaryPrec ideal-int
pkg go/token, const VAR Token
pkg go/token, const XOR Token

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