public bool Equals(Rotor other, float epsilon)
{
__m128 eps = _mm_set1_ps(epsilon);
__m128 cmp = _mm_cmplt_ps(
_mm_andnot_ps(_mm_set1_ps(-0f), _mm_sub_ps(P1, other.P1)), eps);
return(_mm_movemask_ps(cmp) != 0b1111);
}
public static Branch Log(Rotor r)
{
float cos_ang = _mm_store_ss(r.P1);
float ang = MathF.Acos(cos_ang);
float sin_ang = MathF.Sin(ang);
var p1 = _mm_mul_ps(r.P1, Detail.rcp_nr1(_mm_set1_ps(sin_ang)));
p1 = _mm_mul_ps(p1, _mm_set1_ps(ang));
p1 = Sse41.IsSupported
? _mm_blend_ps(p1, _mm_setzero_ps(), 1)
: _mm_and_ps(p1, _mm_castsi128_ps(_mm_set_epi32(-1, -1, -1, 0)));
return(new Branch(p1));
}
public static Rotor Sqrt(Branch b)
{
var p1 = _mm_add_ss(b.P1, _mm_set_ss(1f));
return(new Rotor(Rotor.Normalized(p1)));
}
public bool Equals(Rotor other)
{
return(P1.Equals(other.P1));
}
