SkNxTest.cpp revision 1113da72eced20480491bb87ade0ffcff4eb8ea7 
1/*
2 * Copyright 2015 Google Inc.
3 *
4 * Use of this source code is governed by a BSD-style license that can be
5 * found in the LICENSE file.
6 */
7
8#include "SkNx.h"
9#include "Test.h"
10
11template <int N, typename T>
12static void test_Nf(skiatest::Reporter* r) {
13
14    auto assert_nearly_eq = [&](double eps, const SkNf<N,T>& v, T a, T b, T c, T d) {
15        auto close = [=](T a, T b) { return fabs(a-b) <= eps; };
16        T vals[4];
17        v.store(vals);
18        bool ok = close(vals[0], a) && close(vals[1], b)
19               && close(v.template kth<0>(), a) && close(v.template kth<1>(), b);
20        REPORTER_ASSERT(r, ok);
21        if (N == 4) {
22            ok = close(vals[2], c) && close(vals[3], d)
23              && close(v.template kth<2>(), c) && close(v.template kth<3>(), d);
24            REPORTER_ASSERT(r, ok);
25        }
26    };
27    auto assert_eq = [&](const SkNf<N,T>& v, T a, T b, T c, T d) {
28        return assert_nearly_eq(0, v, a,b,c,d);
29    };
30
31    T vals[] = {3, 4, 5, 6};
32    SkNf<N,T> a = SkNf<N,T>::Load(vals),
33              b(a),
34              c = a;
35    SkNf<N,T> d;
36    d = a;
37
38    assert_eq(a, 3, 4, 5, 6);
39    assert_eq(b, 3, 4, 5, 6);
40    assert_eq(c, 3, 4, 5, 6);
41    assert_eq(d, 3, 4, 5, 6);
42
43    assert_eq(a+b, 6, 8, 10, 12);
44    assert_eq(a*b, 9, 16, 25, 36);
45    assert_eq(a*b-b, 6, 12, 20, 30);
46    assert_eq((a*b).sqrt(), 3, 4, 5, 6);
47    assert_eq(a/b, 1, 1, 1, 1);
48    assert_eq(-a, -3, -4, -5, -6);
49
50    SkNf<N,T> fours(4);
51
52    assert_eq(fours.sqrt(), 2,2,2,2);
53    assert_nearly_eq(0.001, fours.rsqrt(), 0.5, 0.5, 0.5, 0.5);
54
55    assert_eq(              fours.      invert(), 0.25, 0.25, 0.25, 0.25);
56    assert_nearly_eq(0.001, fours.approxInvert(), 0.25, 0.25, 0.25, 0.25);
57
58    assert_eq(SkNf<N,T>::Min(a, fours), 3, 4, 4, 4);
59    assert_eq(SkNf<N,T>::Max(a, fours), 4, 4, 5, 6);
60
61    // Test some comparisons.  This is not exhaustive.
62    REPORTER_ASSERT(r, (a == b).allTrue());
63    REPORTER_ASSERT(r, (a+b == a*b-b).anyTrue());
64    REPORTER_ASSERT(r, !(a+b == a*b-b).allTrue());
65    REPORTER_ASSERT(r, !(a+b == a*b).anyTrue());
66    REPORTER_ASSERT(r, !(a != b).anyTrue());
67    REPORTER_ASSERT(r, (a < fours).anyTrue());
68    REPORTER_ASSERT(r, (a <= fours).anyTrue());
69    REPORTER_ASSERT(r, !(a > fours).allTrue());
70    REPORTER_ASSERT(r, !(a >= fours).allTrue());
71}
72
73DEF_TEST(SkNf, r) {
74    test_Nf<2, float>(r);
75    test_Nf<2, double>(r);
76
77    test_Nf<4, float>(r);
78    test_Nf<4, double>(r);
79}
80
81template <int N, typename T>
82void test_Ni(skiatest::Reporter* r) {
83    auto assert_eq = [&](const SkNi<N,T>& v, T a, T b, T c, T d, T e, T f, T g, T h) {
84        T vals[8];
85        v.store(vals);
86
87        switch (N) {
88          case 8: REPORTER_ASSERT(r, vals[4] == e && vals[5] == f && vals[6] == g && vals[7] == h);
89          case 4: REPORTER_ASSERT(r, vals[2] == c && vals[3] == d);
90          case 2: REPORTER_ASSERT(r, vals[0] == a && vals[1] == b);
91        }
92        switch (N) {
93          case 8: REPORTER_ASSERT(r, v.template kth<4>() == e && v.template kth<5>() == f &&
94                                     v.template kth<6>() == g && v.template kth<7>() == h);
95          case 4: REPORTER_ASSERT(r, v.template kth<2>() == c && v.template kth<3>() == d);
96          case 2: REPORTER_ASSERT(r, v.template kth<0>() == a && v.template kth<1>() == b);
97        }
98    };
99
100    T vals[] = { 1,2,3,4,5,6,7,8 };
101    SkNi<N,T> a = SkNi<N,T>::Load(vals),
102              b(a),
103              c = a;
104    SkNi<N,T> d;
105    d = a;
106
107    assert_eq(a, 1,2,3,4,5,6,7,8);
108    assert_eq(b, 1,2,3,4,5,6,7,8);
109    assert_eq(c, 1,2,3,4,5,6,7,8);
110    assert_eq(d, 1,2,3,4,5,6,7,8);
111
112    assert_eq(a+a, 2,4,6,8,10,12,14,16);
113    assert_eq(a*a, 1,4,9,16,25,36,49,64);
114    assert_eq(a*a-a, 0,2,6,12,20,30,42,56);
115
116    assert_eq(a >> 2, 0,0,0,1,1,1,1,2);
117    assert_eq(a << 1, 2,4,6,8,10,12,14,16);
118
119    REPORTER_ASSERT(r, a.template kth<1>() == 2);
120}
121
122DEF_TEST(SkNi, r) {
123    test_Ni<2, uint16_t>(r);
124    test_Ni<4, uint16_t>(r);
125    test_Ni<8, uint16_t>(r);
126
127    test_Ni<2, int>(r);
128    test_Ni<4, int>(r);
129    test_Ni<8, int>(r);
130}
131