The precise behavior is implementation-dependent.
</p>


<h3 id="Appending_and_copying_slices">Appending to and copying slices</h3>

<p>
The built-in functions <code>append</code> and <code>copy</code> assist in
common slice operations.
For both functions, the result is independent of whether the memory referenced
by the arguments overlaps.
</p>

<p>

they cannot be used as function values.
</p>


<h3 id="Appending_and_copying_slices">Appending to and copying slices</h3>

<p>
The built-in functions <code>append</code> and <code>copy</code> assist in
common slice operations.
For both functions, the result is independent of whether the memory referenced
by the arguments overlaps.
</p>

<p>

// IsARMCMP reports whether the op (as defined by an arm.A* constant) is
// one of the comparison instructions that require special handling.
func IsARMCMP(op obj.As) bool {
	switch op {
	case arm.ACMN, arm.ACMP, arm.ATEQ, arm.ATST:
		return true
	}
	return false
}

// IsARMSTREX reports whether the op (as defined by an arm.A* constant) is
// one of the STREX-like instructions that require special handling.

// IsARM64CMP reports whether the op (as defined by an arm64.A* constant) is
// one of the comparison instructions that require special handling.
func IsARM64CMP(op obj.As) bool {
	switch op {
	case arm64.ACMN, arm64.ACMP, arm64.ATST,
		arm64.ACMNW, arm64.ACMPW, arm64.ATSTW,
		arm64.AFCMPS, arm64.AFCMPD,
		arm64.AFCMPES, arm64.AFCMPED:
		return true
	}
	return false
}