if (v != 0) && ((v+1)&v) == 0 {
		return true
	}
	return false
}

func getPPC64ShiftMaskLength(v int64) int64 {
	return int64(bits.Len64(uint64(v)))
}

// Decompose a shift right into an equivalent rotate/mask,
// and return mask & m.
func mergePPC64RShiftMask(m, s, nbits int64) int64 {
	smask := uint64((1<<uint(nbits))-1) >> uint(s)
	return m & int64(smask)
}

		slice = s.load(n.Type(), addr)
	} else {
		slice = s.expr(sn)
	}

	// Allocate new blocks
	grow := s.f.NewBlock(ssa.BlockPlain)
	assign := s.f.NewBlock(ssa.BlockPlain)

	// Decomposse input slice.
	p := s.newValue1(ssa.OpSlicePtr, pt, slice)
	l := s.newValue1(ssa.OpSliceLen, types.Types[types.TINT], slice)
	c := s.newValue1(ssa.OpSliceCap, types.Types[types.TINT], slice)

<p>
A type determines a set of values together with operations and methods specific
to those values. A type may be denoted by a <i>type name</i>, if it has one,
or specified using a <i>type literal</i>, which composes a type from existing types.
</p>

<pre class="ebnf">
Type      = TypeName | TypeLit | "(" Type ")" .
TypeName  = identifier | QualifiedIdent .

to those values. A type may be denoted by a <i>type name</i>, if it has one, which must be
followed by <a href="#Instantiations">type arguments</a> if the type is generic.
A type may also be specified using a <i>type literal</i>, which composes a type
from existing types.
</p>

<pre class="ebnf">
Type      = TypeName [ TypeArgs ] | TypeLit | "(" Type ")" .
TypeName  = identifier | QualifiedIdent .
TypeArgs  = "[" TypeList [ "," ] "]" .

equal, so that the Rays which converged from the Lens towards X, and without Refraction, would there have crossed and diverged again, may by the Refraction of the second Prism be reduced into Parallelism and diverge no more. For then those Rays will recompose a beam of white Light XY. If the refracting Angle of either Prism be the bigger, that Prism must be so much the nearer to the Lens. You will know when the Prisms and the Lens are well set together, by observing if the beam of Light XY, which comes...

the Lens towards X, and without Refraction, would there have crossed and
diverged again, may by the Refraction of the second Prism be reduced
into Parallelism and diverge no more. For then those Rays will recompose
a beam of white Light XY. If the refracting Angle of either Prism be the
bigger, that Prism must be so much the nearer to the Lens. You will know
when the Prisms and the Lens are well set together, by observing if the