Refactor Sk2x<T> + Sk4x<T> into SkNf<N,T> and SkNi<N,T>

tests/Sk2xTest.cpp

-/*
- * Copyright 2015 Google Inc.
- *
- * Use of this source code is governed by a BSD-style license that can be
- * found in the LICENSE file.
- */
-
-#include "Test.h"
-#include "Sk2x.h"
-
-template <typename T>
-static bool nearly_eq(double eps, const Sk2x<T>& v, double x, double y) {
-    T vals[2];
-    v.store(vals);
-    return fabs(vals[0] - (T)x) <= eps && fabs(vals[1] - (T)y) <= eps;
-}
-
-template <typename T>
-static bool eq(const Sk2x<T>& v, double x, double y) { return nearly_eq(0, v, x, y); }
-
-template <typename T>
-static void test(skiatest::Reporter* r) {
-    // Constructors, assignment, etc.
-    Sk2x<T> a(4),
-            b = a,
-            c(a);
-    REPORTER_ASSERT(r, eq(a, 4, 4));
-    REPORTER_ASSERT(r, eq(b, 4, 4));
-    REPORTER_ASSERT(r, eq(c, 4, 4));
-
-    Sk2x<T> d(2, 5);
-    Sk2x<T> e;
-    e = d;
-    T vals[] = { 2, 5 };
-    Sk2x<T> f = Sk2x<T>::Load(vals);
-    REPORTER_ASSERT(r, eq(d, 2, 5));
-    REPORTER_ASSERT(r, eq(e, 2, 5));
-    REPORTER_ASSERT(r, eq(f, 2, 5));
-
-    a.store(vals);
-    REPORTER_ASSERT(r, vals[0] == 4 && vals[1] == 4);
-
-    // Math
-    REPORTER_ASSERT(r, eq(a + d, 6,   9));
-    REPORTER_ASSERT(r, eq(a - d, 2,  -1));
-    REPORTER_ASSERT(r, eq(a * d, 8,  20));
-    REPORTER_ASSERT(r, eq(a / d, 2, 0.8));
-
-    REPORTER_ASSERT(r, nearly_eq(0.001, a.rsqrt(), 0.5, 0.5));
-    REPORTER_ASSERT(r, eq(a.sqrt(), 2, 2));
-
-    REPORTER_ASSERT(r, nearly_eq(0.001, d.approxInvert(), 0.5, 0.2));
-    REPORTER_ASSERT(r, eq(d.invert(), 0.5, 0.2));
-
-    REPORTER_ASSERT(r, eq(Sk2x<T>::Min(a, d), 2, 4));
-    REPORTER_ASSERT(r, eq(Sk2x<T>::Max(a, d), 4, 5));
-
-    REPORTER_ASSERT(r, eq(-d, -2, -5));
-
-    // A bit of both.
-    a += d;
-    a *= d;
-    a -= d;
-    REPORTER_ASSERT(r, eq(a, 10, 40));
-}
-
-DEF_TEST(Sk2f, r) { test< float>(r); }
-DEF_TEST(Sk2d, r) { test<double>(r); }