pkg math/bits (windows-amd64), const UintSize = 64
pkg math/bits, const UintSize ideal-int
pkg math/bits, func LeadingZeros(uint) int
pkg math/bits, func LeadingZeros16(uint16) int
pkg math/bits, func LeadingZeros32(uint32) int
pkg math/bits, func LeadingZeros64(uint64) int
pkg math/bits, func LeadingZeros8(uint8) int
pkg math/bits, func Len(uint) int
pkg math/bits, func Len16(uint16) int
pkg math/bits, func Len32(uint32) int

	// If either the uncompressed or compressed size of the file
	// does not fit in 32 bits, CompressedSize is set to ^uint32(0).
	//
	// Deprecated: Use CompressedSize64 instead.
	CompressedSize uint32

	// UncompressedSize is the compressed size of the file in bytes.
	// If either the uncompressed or compressed size of the file
	// does not fit in 32 bits, CompressedSize is set to ^uint32(0).
	//

The [`asynctimerchan` setting](/pkg/time/#NewTimer) disables this change.
There are no runtime metrics for this change,
This setting may be removed in a future release, Go 1.27 at the earliest.

Go 1.23 changed the mode bits reported by [`os.Lstat`](/pkg/os#Lstat) and [`os.Stat`](/pkg/os#Stat)
for reparse points, which can be controlled with the `winsymlink` setting.

<li>
<code>R0.UXTB</code>
<br>
<code>R0.UXTB&lt;&lt;imm</code>:
<code>UXTB</code>: extract an 8-bit value from the low-order bits of <code>R0</code> and zero-extend it to the size of <code>R0</code>.
<code>R0.UXTB&lt;&lt;imm</code>: left shift the result of <code>R0.UXTB</code> by <code>imm</code> bits.
The <code>imm</code> value can be 0, 1, 2, 3, or 4.

	if _, err := io.ReadFull(r, buf[off:12]); err != nil {
		return err
	}
	b := readBuf(buf[:12])
	if b.uint32() != f.CRC32 {
		return ErrChecksum
	}

	// The two sizes that follow here can be either 32 bits or 64 bits
	// but the spec is not very clear on this and different
	// interpretations has been made causing incompatibilities. We
	// already have the sizes from the central directory so we can
	// just ignore these.

pkg math (freebsd-riscv64-cgo), const MaxUint = 18446744073709551615 #53466
pkg math (freebsd-riscv64-cgo), const MinInt = -9223372036854775808 #53466
pkg math/bits (freebsd-riscv64), const UintSize = 64 #53466
pkg math/bits (freebsd-riscv64-cgo), const UintSize = 64 #53466
pkg os (freebsd-riscv64), const DevNull = "/dev/null" #53466
pkg os (freebsd-riscv64), const O_APPEND = 8 #53466

implementation must:
</p>

<ul>
	<li>Represent integer constants with at least 256 bits.</li>

	<li>Represent floating-point constants, including the parts of
	    a complex constant, with a mantissa of at least 256 bits
	    and a signed binary exponent of at least 16 bits.</li>

	<li>Give an error if unable to represent an integer constant
	    precisely.</li>

pkg syscall (openbsd-386), type Dirent struct, Fileno uint64
pkg syscall (openbsd-386), type Dirent struct, Off int64
pkg syscall (openbsd-386), type Dirent struct, X__d_padding [4]uint8
pkg syscall (openbsd-386), type FdSet struct, Bits [32]uint32
pkg syscall (openbsd-386), type Kevent_t struct, Data int64
pkg syscall (openbsd-386), type Mclpool struct, Grown int32
pkg syscall (openbsd-386), type RtMetrics struct, Expire int64

pkg syscall (netbsd-arm64-cgo), type Dirent struct, Reclen uint16
pkg syscall (netbsd-arm64-cgo), type Dirent struct, Type uint8
pkg syscall (netbsd-arm64-cgo), type FdSet struct
pkg syscall (netbsd-arm64-cgo), type FdSet struct, Bits [8]uint32
pkg syscall (netbsd-arm64-cgo), type Flock_t struct
pkg syscall (netbsd-arm64-cgo), type Flock_t struct, Len int64
pkg syscall (netbsd-arm64-cgo), type Flock_t struct, Pid int32

	if cond == "" {
		return true
	}
	bits, ok := ParseARMCondition(cond)
	if !ok {
		return false
	}
	/* hack to make B.NE etc. work: turn it into the corresponding conditional */
	if prog.As == arm.AB {
		prog.As = bcode[(bits^arm.C_SCOND_XOR)&0xf]
		bits = (bits &^ 0xf) | arm.C_SCOND_NONE
	}
	prog.Scond = bits
	return true
}