the SIGPROF signal in particular.

The non-Go code should not change the signal mask on any threads
created by the Go runtime. If the non-Go code starts new threads
itself, those threads may set the signal mask as they please.

If the non-Go code starts a new thread, changes the signal mask, and
then invokes a Go function in that thread, the Go runtime will

    this.lastInKeyInsertionOrder = null;
    this.size = 0;
    this.mask = tableSize - 1;
    this.modCount = 0;
  }

  /**
   * Finds and removes {@code entry} from the bucket linked lists in both the key-to-value direction
   * and the value-to-key direction.
   */
  private void delete(BiEntry<K, V> entry) {
    int keyBucket = entry.keyHash & mask;
    BiEntry<K, V> prevBucketEntry = null;

type WaitStatus uint32

const (
	mask  = 0x7F
	core  = 0x80
	shift = 8

	exited  = 0
	killed  = 9
	stopped = 0x7F
)

func (w WaitStatus) Exited() bool { return w&mask == exited }

func (w WaitStatus) ExitStatus() int {
	if w&mask != exited {
		return -1
	}
	return int(w >> shift)
}

func (w WaitStatus) Signaled() bool { return w&mask != stopped && w&mask != 0 }

			wantContainers: []string{"i1", "i2", "c1", "c2", "e1", "e2"},
			mask:           AllContainers,
		},
	}

	for _, tc := range testCases {
		t.Run(tc.desc, func(t *testing.T) {
			if tc.mask == setAllFeatureEnabledContainersDuringTest {
				tc.mask = AllFeatureEnabledContainers()
			}

			gotContainers := []string{}
			VisitContainers(tc.spec, tc.mask, func(c *v1.Container, containerType ContainerType) bool {

type WaitStatus uint32

const (
	mask  = 0x7F
	core  = 0x80
	shift = 8

	exited  = 0
	stopped = 0x7F
)

func (w WaitStatus) Exited() bool { return w&mask == exited }

func (w WaitStatus) ExitStatus() int {
	if w&mask != exited {
		return -1
	}
	return int(w >> shift)
}

func (w WaitStatus) Signaled() bool { return w&mask != stopped && w&mask != 0 }

	}
}

// removeOneCPU removes one (any) cpu from affinity mask.
// It returns new affinity mask.
func removeOneCPU(mask uintptr) (uintptr, error) {
	if mask == 0 {
		return 0, fmt.Errorf("cpu affinity mask is empty")
	}
	maskbits := int(unsafe.Sizeof(mask) * 8)
	for i := 0; i < maskbits; i++ {
		newmask := mask & ^(1 << uint(i))
		if newmask != mask {
			return newmask, nil
		}

	}
	panic("not reached")

}

func adjustScore(typ scoreAdjustTyp, score int, mask scoreAdjustTyp) (int, scoreAdjustTyp) {

	if isMust(typ) {
		if mask&typ != 0 {
			return score, mask
		}
		may := mustToMay(typ)
		if mask&may != 0 {
			// promote may to must, so undo may
			score -= adjValue(may)
			mask &^= may
		}
	} else if isMay(typ) {
		must := mayToMust(typ)
		if mask&(must|typ) != 0 {
			return score, mask
		}
	}

	ADD	$16, OUTENC, OUTENC
	ADD	$-16, OUTDEC, OUTDEC
	VSPLTISB	$8, KEY                  // vspltisb 3,8
	MOVD	CNT, CTR                         // mtctr 7
	VSUBUBM	MASK, KEY, MASK                  // vsububm 5,5,3

loop192:
	VPERM	IN1, IN1, MASK, KEY // vperm 3,2,2,5
	VSLDOI	$12, ZERO, IN0, TMP // vsldoi 6,0,1,12
	VCIPHERLAST	KEY, RCON, KEY      // vcipherlast 3,3,4

	VXOR	IN0, TMP, IN0       // vxor 1,1,6

    ReducedPrecisionSupport mask = ReducedPrecisionSupport::None;
    if (toco_flags.quantize_to_float16()) {
      mask |= ReducedPrecisionSupport::Float16Inference;
    }
    if (toco_flags.allow_bfloat16()) {
      mask |= ReducedPrecisionSupport::Bfloat16Inference;
    }
    if (toco_flags.accumulation_type() == toco::IODataType::FLOAT16) {
      mask |= ReducedPrecisionSupport::Float16Accumulation;

//
//go:nosplit
func setSignalstackSP(s *stackt, sp uintptr) {
	s.ss_sp = sp
}

//go:nosplit
//go:nowritebarrierrec
func sigaddset(mask *sigset, i int) {
	mask.__bits[(i-1)/32] |= 1 << ((uint32(i) - 1) & 31)
}

func sigdelset(mask *sigset, i int) {
	mask.__bits[(i-1)/32] &^= 1 << ((uint32(i) - 1) & 31)
}

//go:nosplit
func (c *sigctxt) fixsigcode(sig uint32) {
}