//
//go:linkname signal_enable os/signal.signal_enable
func signal_enable(s uint32) {
	if !sig.inuse {
		// This is the first call to signal_enable. Initialize.
		sig.inuse = true // enable reception of signals; cannot disable
		if GOOS == "darwin" || GOOS == "ios" {
			sigNoteSetup(&sig.note)
		} else {
			noteclear(&sig.note)
		}
	}

	if s >= uint32(len(sig.wanted)*32) {
		return
	}

	w := sig.wanted[s/32]

package race

import (
	"unsafe"
)

const Enabled = false

func Acquire(addr unsafe.Pointer) {
}

func Release(addr unsafe.Pointer) {
}

func ReleaseMerge(addr unsafe.Pointer) {
}

func Disable() {
}

func Enable() {
}

func Read(addr unsafe.Pointer) {
}

func Write(addr unsafe.Pointer) {
}

func ReadRange(addr unsafe.Pointer, len int) {
}

	for i := 0; i <= (1 << fastlogNumBits); i++ {
		fastlog2Table[i] = log2(1.0 + float64(i)/(1<<fastlogNumBits))
	}
	return fastlog2Table
}

// log2 is a local copy of math.Log2 with an explicit float64 conversion
// to disable FMA. This lets us generate the same output on all platforms.
func log2(x float64) float64 {
	frac, exp := math.Frexp(x)
	// Make sure exact powers of two give an exact answer.

	if !isSecureMode() {
		return
	}

	// When secure mode is enabled, we do one thing: enforce specific
	// environment variable values (currently we only force GOTRACEBACK=none)
	//
	// Other packages may also disable specific functionality when secure mode
	// is enabled (determined by using linkname to call isSecureMode).

	secureEnv()
}

func secureEnv() {
	var hasTraceback bool
	for i := 0; i < len(envs); i++ {

// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
// THE SOFTWARE.

package sym

	}
	return Compare(Lang(v), Lang(release)) >= 0
}

// Before reports whether the file version v is strictly before a Go release.
//
// Use this predicate to disable a behavior once a certain Go release
// has happened (and stays enabled in the future).
func Before(v, release string) bool {
	if v == Future {
		return false // an unknown future version happens after y.
	}

// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
// THE SOFTWARE.

package arm

	ARM64.HasSHA512 = isSet(HWCap, hwcap_SHA512)

	// The Samsung S9+ kernel reports support for atomics, but not all cores
	// actually support them, resulting in SIGILL. See issue #28431.
	// TODO(elias.naur): Only disable the optimization on bad chipsets on android.
	ARM64.HasATOMICS = isSet(HWCap, hwcap_ATOMICS) && os != "android"

	// Check to see if executing on a Neoverse core and in order to do that,

//
//go:linkname signal_enable os/signal.signal_enable
func signal_enable(s uint32) {
	if !sig.inuse {
		// This is the first call to signal_enable. Initialize.
		sig.inuse = true // enable reception of signals; cannot disable
		noteclear(&sig.note)
	}
}

// Must only be called from a single goroutine at a time.
//
//go:linkname signal_disable os/signal.signal_disable
func signal_disable(s uint32) {
}

// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
// THE SOFTWARE.

package obj