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skia2/tests/SkNxTest.cpp
John Stiles 30212b7941 Fix implicit fallthroughs throughout Skia. 
This CL is not fully comprehensive; for instance, it does not contain
fixes for backends that don't compile on Mac. But it does resolve the
vast majority of cases that trigger -Wimplicit-fallthrough.

A few minor bugs were found and fixed, but none that were likely to
affect normal operation.

Change-Id: I43487602b0d56200ce8b42702e04f66390d82f60
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/295916
Reviewed-by: Mike Klein <mtklein@google.com>
Commit-Queue: John Stiles <johnstiles@google.com>
2020-06-11 22:29:53 +00:00

522 lines
16 KiB
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/*
* 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 "include/private/SkNx.h"
#include "include/utils/SkRandom.h"
#include "src/core/Sk4px.h"
#include "tests/Test.h"
template <int N>
static void test_Nf(skiatest::Reporter* r) {
auto assert_nearly_eq = [&](float eps, const SkNx<N, float>& v,
float a, float b, float c, float d) {
auto close = [=](float a, float b) { return fabsf(a-b) <= eps; };
float vals[4];
v.store(vals);
bool ok = close(vals[0], a) && close(vals[1], b)
&& close( v[0], a) && close( v[1], b);
REPORTER_ASSERT(r, ok);
if (N == 4) {
ok = close(vals[2], c) && close(vals[3], d)
&& close( v[2], c) && close( v[3], d);
REPORTER_ASSERT(r, ok);
}
};
auto assert_eq = [&](const SkNx<N, float>& v, float a, float b, float c, float d) {
return assert_nearly_eq(0, v, a,b,c,d);
};
float vals[] = {3, 4, 5, 6};
SkNx<N,float> a = SkNx<N,float>::Load(vals),
b(a),
c = a;
SkNx<N,float> d;
d = a;
assert_eq(a, 3, 4, 5, 6);
assert_eq(b, 3, 4, 5, 6);
assert_eq(c, 3, 4, 5, 6);
assert_eq(d, 3, 4, 5, 6);
assert_eq(a+b, 6, 8, 10, 12);
assert_eq(a*b, 9, 16, 25, 36);
assert_eq(a*b-b, 6, 12, 20, 30);
assert_eq((a*b).sqrt(), 3, 4, 5, 6);
assert_eq(a/b, 1, 1, 1, 1);
assert_eq(SkNx<N,float>(0)-a, -3, -4, -5, -6);
SkNx<N,float> fours(4);
assert_eq(fours.sqrt(), 2,2,2,2);
assert_nearly_eq(0.001f, fours.rsqrt(), 0.5, 0.5, 0.5, 0.5);
assert_nearly_eq(0.001f, fours.invert(), 0.25, 0.25, 0.25, 0.25);
assert_eq(SkNx<N,float>::Min(a, fours), 3, 4, 4, 4);
assert_eq(SkNx<N,float>::Max(a, fours), 4, 4, 5, 6);
// Test some comparisons. This is not exhaustive.
REPORTER_ASSERT(r, (a == b).allTrue());
REPORTER_ASSERT(r, (a+b == a*b-b).anyTrue());
REPORTER_ASSERT(r, !(a+b == a*b-b).allTrue());
REPORTER_ASSERT(r, !(a+b == a*b).anyTrue());
REPORTER_ASSERT(r, !(a != b).anyTrue());
REPORTER_ASSERT(r, (a < fours).anyTrue());
REPORTER_ASSERT(r, (a <= fours).anyTrue());
REPORTER_ASSERT(r, !(a > fours).allTrue());
REPORTER_ASSERT(r, !(a >= fours).allTrue());
}
DEF_TEST(SkNf, r) {
test_Nf<2>(r);
test_Nf<4>(r);
}
template <int N, typename T>
void test_Ni(skiatest::Reporter* r) {
auto assert_eq = [&](const SkNx<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);
[[fallthrough]];
case 4:
REPORTER_ASSERT(r, vals[2] == c && vals[3] == d);
[[fallthrough]];
case 2:
REPORTER_ASSERT(r, vals[0] == a && vals[1] == b);
}
switch (N) {
case 8:
REPORTER_ASSERT(r, v[4] == e && v[5] == f && v[6] == g && v[7] == h);
[[fallthrough]];
case 4:
REPORTER_ASSERT(r, v[2] == c && v[3] == d);
[[fallthrough]];
case 2:
REPORTER_ASSERT(r, v[0] == a && v[1] == b);
}
};
T vals[] = { 1,2,3,4,5,6,7,8 };
SkNx<N,T> a = SkNx<N,T>::Load(vals),
b(a),
c = a;
SkNx<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[1] == 2);
}
DEF_TEST(SkNx, 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);
}
DEF_TEST(SkNi_min_lt, r) {
// Exhaustively check the 8x8 bit space.
for (int a = 0; a < (1<<8); a++) {
for (int b = 0; b < (1<<8); b++) {
Sk16b aw(a), bw(b);
REPORTER_ASSERT(r, Sk16b::Min(aw, bw)[0] == std::min(a, b));
REPORTER_ASSERT(r, !(aw < bw)[0] == !(a < b));
}}
// Exhausting the 16x16 bit space is kind of slow, so only do that in release builds.
#ifdef SK_DEBUG
SkRandom rand;
for (int i = 0; i < (1<<16); i++) {
uint16_t a = rand.nextU() >> 16,
b = rand.nextU() >> 16;
REPORTER_ASSERT(r, Sk16h::Min(Sk16h(a), Sk16h(b))[0] == std::min(a, b));
}
#else
for (int a = 0; a < (1<<16); a++) {
for (int b = 0; b < (1<<16); b++) {
REPORTER_ASSERT(r, Sk16h::Min(Sk16h(a), Sk16h(b))[0] == std::min(a, b));
}}
#endif
}
DEF_TEST(SkNi_saturatedAdd, r) {
for (int a = 0; a < (1<<8); a++) {
for (int b = 0; b < (1<<8); b++) {
int exact = a+b;
if (exact > 255) { exact = 255; }
if (exact < 0) { exact = 0; }
REPORTER_ASSERT(r, Sk16b(a).saturatedAdd(Sk16b(b))[0] == exact);
}
}
}
DEF_TEST(SkNi_mulHi, r) {
// First 8 primes.
Sk4u a{ 0x00020000, 0x00030000, 0x00050000, 0x00070000 };
Sk4u b{ 0x000b0000, 0x000d0000, 0x00110000, 0x00130000 };
Sk4u q{22, 39, 85, 133};
Sk4u c = a.mulHi(b);
REPORTER_ASSERT(r, c[0] == q[0]);
REPORTER_ASSERT(r, c[1] == q[1]);
REPORTER_ASSERT(r, c[2] == q[2]);
REPORTER_ASSERT(r, c[3] == q[3]);
}
DEF_TEST(Sk4px_muldiv255round, r) {
for (int a = 0; a < (1<<8); a++) {
for (int b = 0; b < (1<<8); b++) {
int exact = (a*b+127)/255;
// Duplicate a and b 16x each.
Sk4px av = Sk16b(a),
bv = Sk16b(b);
// This way should always be exactly correct.
int correct = (av * bv).div255()[0];
REPORTER_ASSERT(r, correct == exact);
// We're a bit more flexible on this method: correct for 0 or 255, otherwise off by <=1.
int fast = av.approxMulDiv255(bv)[0];
REPORTER_ASSERT(r, fast-exact >= -1 && fast-exact <= 1);
if (a == 0 || a == 255 || b == 0 || b == 255) {
REPORTER_ASSERT(r, fast == exact);
}
}
}
}
DEF_TEST(SkNx_abs, r) {
auto fs = Sk4f(0.0f, -0.0f, 2.0f, -4.0f).abs();
REPORTER_ASSERT(r, fs[0] == 0.0f);
REPORTER_ASSERT(r, fs[1] == 0.0f);
REPORTER_ASSERT(r, fs[2] == 2.0f);
REPORTER_ASSERT(r, fs[3] == 4.0f);
auto fshi = Sk2f(0.0f, -0.0f).abs();
auto fslo = Sk2f(2.0f, -4.0f).abs();
REPORTER_ASSERT(r, fshi[0] == 0.0f);
REPORTER_ASSERT(r, fshi[1] == 0.0f);
REPORTER_ASSERT(r, fslo[0] == 2.0f);
REPORTER_ASSERT(r, fslo[1] == 4.0f);
}
DEF_TEST(Sk4i_abs, r) {
auto is = Sk4i(0, -1, 2, -2147483647).abs();
REPORTER_ASSERT(r, is[0] == 0);
REPORTER_ASSERT(r, is[1] == 1);
REPORTER_ASSERT(r, is[2] == 2);
REPORTER_ASSERT(r, is[3] == 2147483647);
}
DEF_TEST(Sk4i_minmax, r) {
auto a = Sk4i(0, 2, 4, 6);
auto b = Sk4i(1, 1, 3, 7);
auto min = Sk4i::Min(a, b);
auto max = Sk4i::Max(a, b);
for(int i = 0; i < 4; ++i) {
REPORTER_ASSERT(r, min[i] == std::min(a[i], b[i]));
REPORTER_ASSERT(r, max[i] == std::max(a[i], b[i]));
}
}
DEF_TEST(SkNx_floor, r) {
auto fs = Sk4f(0.4f, -0.4f, 0.6f, -0.6f).floor();
REPORTER_ASSERT(r, fs[0] == 0.0f);
REPORTER_ASSERT(r, fs[1] == -1.0f);
REPORTER_ASSERT(r, fs[2] == 0.0f);
REPORTER_ASSERT(r, fs[3] == -1.0f);
auto fs2 = Sk2f(0.4f, -0.4f).floor();
REPORTER_ASSERT(r, fs2[0] == 0.0f);
REPORTER_ASSERT(r, fs2[1] == -1.0f);
auto fs3 = Sk2f(0.6f, -0.6f).floor();
REPORTER_ASSERT(r, fs3[0] == 0.0f);
REPORTER_ASSERT(r, fs3[1] == -1.0f);
}
DEF_TEST(SkNx_shuffle, r) {
Sk4f f4(0,10,20,30);
Sk2f f2 = SkNx_shuffle<2,1>(f4);
REPORTER_ASSERT(r, f2[0] == 20);
REPORTER_ASSERT(r, f2[1] == 10);
f4 = SkNx_shuffle<0,1,1,0>(f2);
REPORTER_ASSERT(r, f4[0] == 20);
REPORTER_ASSERT(r, f4[1] == 10);
REPORTER_ASSERT(r, f4[2] == 10);
REPORTER_ASSERT(r, f4[3] == 20);
}
DEF_TEST(SkNx_int_float, r) {
Sk4f f(-2.3f, 1.0f, 0.45f, 0.6f);
Sk4i i = SkNx_cast<int>(f);
REPORTER_ASSERT(r, i[0] == -2);
REPORTER_ASSERT(r, i[1] == 1);
REPORTER_ASSERT(r, i[2] == 0);
REPORTER_ASSERT(r, i[3] == 0);
f = SkNx_cast<float>(i);
REPORTER_ASSERT(r, f[0] == -2.0f);
REPORTER_ASSERT(r, f[1] == 1.0f);
REPORTER_ASSERT(r, f[2] == 0.0f);
REPORTER_ASSERT(r, f[3] == 0.0f);
}
#include "include/utils/SkRandom.h"
DEF_TEST(SkNx_u16_float, r) {
{
// u16 --> float
auto h4 = Sk4h(15, 17, 257, 65535);
auto f4 = SkNx_cast<float>(h4);
REPORTER_ASSERT(r, f4[0] == 15.0f);
REPORTER_ASSERT(r, f4[1] == 17.0f);
REPORTER_ASSERT(r, f4[2] == 257.0f);
REPORTER_ASSERT(r, f4[3] == 65535.0f);
}
{
// float -> u16
auto f4 = Sk4f(15, 17, 257, 65535);
auto h4 = SkNx_cast<uint16_t>(f4);
REPORTER_ASSERT(r, h4[0] == 15);
REPORTER_ASSERT(r, h4[1] == 17);
REPORTER_ASSERT(r, h4[2] == 257);
REPORTER_ASSERT(r, h4[3] == 65535);
}
// starting with any u16 value, we should be able to have a perfect round-trip in/out of floats
//
SkRandom rand;
for (int i = 0; i < 10000; ++i) {
const uint16_t s16[4] {
(uint16_t)(rand.nextU() >> 16), (uint16_t)(rand.nextU() >> 16),
(uint16_t)(rand.nextU() >> 16), (uint16_t)(rand.nextU() >> 16),
};
auto u4_0 = Sk4h::Load(s16);
auto f4 = SkNx_cast<float>(u4_0);
auto u4_1 = SkNx_cast<uint16_t>(f4);
uint16_t d16[4];
u4_1.store(d16);
REPORTER_ASSERT(r, !memcmp(s16, d16, sizeof(s16)));
}
}
// The SSE2 implementation of SkNx_cast<uint16_t>(Sk4i) is non-trivial, so worth a test.
DEF_TEST(SkNx_int_u16, r) {
// These are pretty hard to get wrong.
for (int i = 0; i <= 0x7fff; i++) {
uint16_t expected = (uint16_t)i;
uint16_t actual = SkNx_cast<uint16_t>(Sk4i(i))[0];
REPORTER_ASSERT(r, expected == actual);
}
// A naive implementation with _mm_packs_epi32 would succeed up to 0x7fff but fail here:
for (int i = 0x8000; (1) && i <= 0xffff; i++) {
uint16_t expected = (uint16_t)i;
uint16_t actual = SkNx_cast<uint16_t>(Sk4i(i))[0];
REPORTER_ASSERT(r, expected == actual);
}
}
DEF_TEST(SkNx_4fLoad4Store4, r) {
float src[] = {
0.0f, 1.0f, 2.0f, 3.0f,
4.0f, 5.0f, 6.0f, 7.0f,
8.0f, 9.0f, 10.0f, 11.0f,
12.0f, 13.0f, 14.0f, 15.0f
};
Sk4f a, b, c, d;
Sk4f::Load4(src, &a, &b, &c, &d);
REPORTER_ASSERT(r, 0.0f == a[0]);
REPORTER_ASSERT(r, 4.0f == a[1]);
REPORTER_ASSERT(r, 8.0f == a[2]);
REPORTER_ASSERT(r, 12.0f == a[3]);
REPORTER_ASSERT(r, 1.0f == b[0]);
REPORTER_ASSERT(r, 5.0f == b[1]);
REPORTER_ASSERT(r, 9.0f == b[2]);
REPORTER_ASSERT(r, 13.0f == b[3]);
REPORTER_ASSERT(r, 2.0f == c[0]);
REPORTER_ASSERT(r, 6.0f == c[1]);
REPORTER_ASSERT(r, 10.0f == c[2]);
REPORTER_ASSERT(r, 14.0f == c[3]);
REPORTER_ASSERT(r, 3.0f == d[0]);
REPORTER_ASSERT(r, 7.0f == d[1]);
REPORTER_ASSERT(r, 11.0f == d[2]);
REPORTER_ASSERT(r, 15.0f == d[3]);
float dst[16];
Sk4f::Store4(dst, a, b, c, d);
REPORTER_ASSERT(r, 0 == memcmp(dst, src, 16 * sizeof(float)));
}
DEF_TEST(SkNx_neg, r) {
auto fs = -Sk4f(0.0f, -0.0f, 2.0f, -4.0f);
REPORTER_ASSERT(r, fs[0] == 0.0f);
REPORTER_ASSERT(r, fs[1] == 0.0f);
REPORTER_ASSERT(r, fs[2] == -2.0f);
REPORTER_ASSERT(r, fs[3] == 4.0f);
auto fshi = -Sk2f(0.0f, -0.0f);
auto fslo = -Sk2f(2.0f, -4.0f);
REPORTER_ASSERT(r, fshi[0] == 0.0f);
REPORTER_ASSERT(r, fshi[1] == 0.0f);
REPORTER_ASSERT(r, fslo[0] == -2.0f);
REPORTER_ASSERT(r, fslo[1] == 4.0f);
}
DEF_TEST(SkNx_thenElse, r) {
auto fs = (Sk4f(0.0f, -0.0f, 2.0f, -4.0f) < 0).thenElse(-1, 1);
REPORTER_ASSERT(r, fs[0] == 1);
REPORTER_ASSERT(r, fs[1] == 1);
REPORTER_ASSERT(r, fs[2] == 1);
REPORTER_ASSERT(r, fs[3] == -1);
auto fshi = (Sk2f(0.0f, -0.0f) < 0).thenElse(-1, 1);
auto fslo = (Sk2f(2.0f, -4.0f) < 0).thenElse(-1, 1);
REPORTER_ASSERT(r, fshi[0] == 1);
REPORTER_ASSERT(r, fshi[1] == 1);
REPORTER_ASSERT(r, fslo[0] == 1);
REPORTER_ASSERT(r, fslo[1] == -1);
}
DEF_TEST(Sk4f_Load2, r) {
float xy[8] = { 0,1,2,3,4,5,6,7 };
Sk4f x,y;
Sk4f::Load2(xy, &x,&y);
REPORTER_ASSERT(r, x[0] == 0);
REPORTER_ASSERT(r, x[1] == 2);
REPORTER_ASSERT(r, x[2] == 4);
REPORTER_ASSERT(r, x[3] == 6);
REPORTER_ASSERT(r, y[0] == 1);
REPORTER_ASSERT(r, y[1] == 3);
REPORTER_ASSERT(r, y[2] == 5);
REPORTER_ASSERT(r, y[3] == 7);
}
DEF_TEST(Sk2f_Load2, r) {
float xy[4] = { 0,1,2,3 };
Sk2f x,y;
Sk2f::Load2(xy, &x,&y);
REPORTER_ASSERT(r, x[0] == 0);
REPORTER_ASSERT(r, x[1] == 2);
REPORTER_ASSERT(r, y[0] == 1);
REPORTER_ASSERT(r, y[1] == 3);
}
DEF_TEST(Sk2f_Store2, r) {
Sk2f p0{0, 2};
Sk2f p1{1, 3};
float dst[4];
Sk2f::Store2(dst, p0, p1);
REPORTER_ASSERT(r, dst[0] == 0);
REPORTER_ASSERT(r, dst[1] == 1);
REPORTER_ASSERT(r, dst[2] == 2);
REPORTER_ASSERT(r, dst[3] == 3);
}
DEF_TEST(Sk2f_Store3, r) {
Sk2f p0{0, 3};
Sk2f p1{1, 4};
Sk2f p2{2, 5};
float dst[6];
Sk2f::Store3(dst, p0, p1, p2);
REPORTER_ASSERT(r, dst[0] == 0);
REPORTER_ASSERT(r, dst[1] == 1);
REPORTER_ASSERT(r, dst[2] == 2);
REPORTER_ASSERT(r, dst[3] == 3);
REPORTER_ASSERT(r, dst[4] == 4);
REPORTER_ASSERT(r, dst[5] == 5);
}
DEF_TEST(Sk2f_Store4, r) {
Sk2f p0{0, 4};
Sk2f p1{1, 5};
Sk2f p2{2, 6};
Sk2f p3{3, 7};
float dst[8] = {-1, -1, -1, -1, -1, -1, -1, -1};
Sk2f::Store4(dst, p0, p1, p2, p3);
REPORTER_ASSERT(r, dst[0] == 0);
REPORTER_ASSERT(r, dst[1] == 1);
REPORTER_ASSERT(r, dst[2] == 2);
REPORTER_ASSERT(r, dst[3] == 3);
REPORTER_ASSERT(r, dst[4] == 4);
REPORTER_ASSERT(r, dst[5] == 5);
REPORTER_ASSERT(r, dst[6] == 6);
REPORTER_ASSERT(r, dst[7] == 7);
// Ensure transposing to Sk4f works.
Sk4f dst4f[2] = {{-1, -1, -1, -1}, {-1, -1, -1, -1}};
Sk2f::Store4(dst4f, p0, p1, p2, p3);
REPORTER_ASSERT(r, dst4f[0][0] == 0);
REPORTER_ASSERT(r, dst4f[0][1] == 1);
REPORTER_ASSERT(r, dst4f[0][2] == 2);
REPORTER_ASSERT(r, dst4f[0][3] == 3);
REPORTER_ASSERT(r, dst4f[1][0] == 4);
REPORTER_ASSERT(r, dst4f[1][1] == 5);
REPORTER_ASSERT(r, dst4f[1][2] == 6);
REPORTER_ASSERT(r, dst4f[1][3] == 7);
}
DEF_TEST(Sk4f_minmax, r) {
REPORTER_ASSERT(r, 3 == Sk4f(0,1,2,3).max());
REPORTER_ASSERT(r, 2 == Sk4f(1,-5,2,-1).max());
REPORTER_ASSERT(r, -1 == Sk4f(-2,-1,-6,-3).max());
REPORTER_ASSERT(r, 3 == Sk4f(3,2,1,0).max());
REPORTER_ASSERT(r, 0 == Sk4f(0,1,2,3).min());
REPORTER_ASSERT(r, -5 == Sk4f(1,-5,2,-1).min());
REPORTER_ASSERT(r, -6 == Sk4f(-2,-1,-6,-3).min());
REPORTER_ASSERT(r, 0 == Sk4f(3,2,1,0).min());
}
DEF_TEST(SkNf_anyTrue_allTrue, r) {
REPORTER_ASSERT(r, (Sk2f{1,2} < Sk2f{3,4}).anyTrue());
REPORTER_ASSERT(r, (Sk2f{1,2} < Sk2f{3,4}).allTrue());
REPORTER_ASSERT(r, (Sk2f{3,2} < Sk2f{1,4}).anyTrue());
REPORTER_ASSERT(r, !(Sk2f{3,2} < Sk2f{1,4}).allTrue());
REPORTER_ASSERT(r, !(Sk2f{3,4} < Sk2f{1,2}).anyTrue());
REPORTER_ASSERT(r, (Sk4f{1,2,3,4} < Sk4f{3,4,5,6}).anyTrue());
REPORTER_ASSERT(r, (Sk4f{1,2,3,4} < Sk4f{3,4,5,6}).allTrue());
REPORTER_ASSERT(r, (Sk4f{1,2,3,4} < Sk4f{1,4,1,1}).anyTrue());
REPORTER_ASSERT(r, !(Sk4f{1,2,3,4} < Sk4f{1,4,1,1}).allTrue());
REPORTER_ASSERT(r, !(Sk4f{3,4,5,6} < Sk4f{1,2,3,4}).anyTrue());
}
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