Mike's radial gradient CL with better float -> int.

tests/SkNxTest.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 "SkNx.h"
 #include "Test.h"
 
@@ skipping 71 matching lines @@
 void test_Ni(skiatest::Reporter* r) {
     auto assert_eq = [&](const SkNi<N,T>& v, T a, T b, T c, T d, T e, T f, T g, T h) {
         T vals[8];
         v.store(vals);
 
         switch (N) {
           case 8: REPORTER_ASSERT(r, vals[4] == e && vals[5] == f && vals[6] == g && vals[7] == h);
           case 4: REPORTER_ASSERT(r, vals[2] == c && vals[3] == d);
           case 2: REPORTER_ASSERT(r, vals[0] == a && vals[1] == b);
         }
+        switch (N) {
+          case 8: REPORTER_ASSERT(r, v.template kth<4>() == e && v.template kth<5>() == f &&
+                                     v.template kth<6>() == g && v.template kth<7>() == h);
+          case 4: REPORTER_ASSERT(r, v.template kth<2>() == c && v.template kth<3>() == d);
+          case 2: REPORTER_ASSERT(r, v.template kth<0>() == a && v.template kth<1>() == b);
+        }
     };
 
     T vals[] = { 1,2,3,4,5,6,7,8 };
     SkNi<N,T> a = SkNi<N,T>::Load(vals),
               b(a),
               c = a;
     SkNi<N,T> d;
     d = a;
 
     assert_eq(a, 1,2,3,4,5,6,7,8);
     assert_eq(b, 1,2,3,4,5,6,7,8);
     assert_eq(c, 1,2,3,4,5,6,7,8);
     assert_eq(d, 1,2,3,4,5,6,7,8);
 
     assert_eq(a+a, 2,4,6,8,10,12,14,16);
     assert_eq(a*a, 1,4,9,16,25,36,49,64);
     assert_eq(a*a-a, 0,2,6,12,20,30,42,56);
 
     assert_eq(a >> 2, 0,0,0,1,1,1,1,2);
     assert_eq(a << 1, 2,4,6,8,10,12,14,16);
 
     REPORTER_ASSERT(r, a.template kth<1>() == 2);
 }
 
 DEF_TEST(SkNi, r) {
     test_Ni<2, uint16_t>(r);
     test_Ni<4, uint16_t>(r);
     test_Ni<8, uint16_t>(r);
+
+    test_Ni<2, int>(r);
+    test_Ni<4, int>(r);
+    test_Ni<8, int>(r);
 }