1 /*
2 * Copyright 2013 The LibYuv Project Authors. All rights reserved.
3 *
4 * Use of this source code is governed by a BSD-style license
5 * that can be found in the LICENSE file in the root of the source
6 * tree. An additional intellectual property rights grant can be found
7 * in the file PATENTS. All contributing project authors may
8 * be found in the AUTHORS file in the root of the source tree.
9 */
10
11 #include <stdlib.h>
12 #include <string.h>
13 #include <time.h>
14
15 #include "../unit_test/unit_test.h"
16 #include "libyuv/basic_types.h"
17 #include "libyuv/cpu_id.h"
18 #include "libyuv/scale.h"
19 #include "libyuv/scale_row.h"
20
21 namespace libyuv {
22
TEST_F(LibYUVBaseTest,TestFixedDiv)23 TEST_F(LibYUVBaseTest, TestFixedDiv) {
24 int num[1280];
25 int div[1280];
26 int result_opt[1280];
27 int result_c[1280];
28
29 EXPECT_EQ(0x10000, libyuv::FixedDiv(1, 1));
30 EXPECT_EQ(0x7fff0000, libyuv::FixedDiv(0x7fff, 1));
31 // TODO(fbarchard): Avoid the following that throw exceptions.
32 // EXPECT_EQ(0x100000000, libyuv::FixedDiv(0x10000, 1));
33 // EXPECT_EQ(0x80000000, libyuv::FixedDiv(0x8000, 1));
34
35 EXPECT_EQ(0x20000, libyuv::FixedDiv(640 * 2, 640));
36 EXPECT_EQ(0x30000, libyuv::FixedDiv(640 * 3, 640));
37 EXPECT_EQ(0x40000, libyuv::FixedDiv(640 * 4, 640));
38 EXPECT_EQ(0x50000, libyuv::FixedDiv(640 * 5, 640));
39 EXPECT_EQ(0x60000, libyuv::FixedDiv(640 * 6, 640));
40 EXPECT_EQ(0x70000, libyuv::FixedDiv(640 * 7, 640));
41 EXPECT_EQ(0x80000, libyuv::FixedDiv(640 * 8, 640));
42 EXPECT_EQ(0xa0000, libyuv::FixedDiv(640 * 10, 640));
43 EXPECT_EQ(0x20000, libyuv::FixedDiv(960 * 2, 960));
44 EXPECT_EQ(0x08000, libyuv::FixedDiv(640 / 2, 640));
45 EXPECT_EQ(0x04000, libyuv::FixedDiv(640 / 4, 640));
46 EXPECT_EQ(0x20000, libyuv::FixedDiv(1080 * 2, 1080));
47 EXPECT_EQ(0x20000, libyuv::FixedDiv(200000, 100000));
48 EXPECT_EQ(0x18000, libyuv::FixedDiv(150000, 100000));
49 EXPECT_EQ(0x20000, libyuv::FixedDiv(40000, 20000));
50 EXPECT_EQ(0x20000, libyuv::FixedDiv(-40000, -20000));
51 EXPECT_EQ(-0x20000, libyuv::FixedDiv(40000, -20000));
52 EXPECT_EQ(-0x20000, libyuv::FixedDiv(-40000, 20000));
53 EXPECT_EQ(0x10000, libyuv::FixedDiv(4095, 4095));
54 EXPECT_EQ(0x10000, libyuv::FixedDiv(4096, 4096));
55 EXPECT_EQ(0x10000, libyuv::FixedDiv(4097, 4097));
56 EXPECT_EQ(123 * 65536, libyuv::FixedDiv(123, 1));
57
58 for (int i = 1; i < 4100; ++i) {
59 EXPECT_EQ(0x10000, libyuv::FixedDiv(i, i));
60 EXPECT_EQ(0x20000, libyuv::FixedDiv(i * 2, i));
61 EXPECT_EQ(0x30000, libyuv::FixedDiv(i * 3, i));
62 EXPECT_EQ(0x40000, libyuv::FixedDiv(i * 4, i));
63 EXPECT_EQ(0x08000, libyuv::FixedDiv(i, i * 2));
64 EXPECT_NEAR(16384 * 65536 / i, libyuv::FixedDiv(16384, i), 1);
65 }
66 EXPECT_EQ(123 * 65536, libyuv::FixedDiv(123, 1));
67
68 MemRandomize(reinterpret_cast<uint8*>(&num[0]), sizeof(num));
69 MemRandomize(reinterpret_cast<uint8*>(&div[0]), sizeof(div));
70 for (int j = 0; j < 1280; ++j) {
71 if (div[j] == 0) {
72 div[j] = 1280;
73 }
74 num[j] &= 0xffff; // Clamp to avoid divide overflow.
75 }
76 for (int i = 0; i < benchmark_pixels_div1280_; ++i) {
77 for (int j = 0; j < 1280; ++j) {
78 result_opt[j] = libyuv::FixedDiv(num[j], div[j]);
79 }
80 }
81 for (int j = 0; j < 1280; ++j) {
82 result_c[j] = libyuv::FixedDiv_C(num[j], div[j]);
83 EXPECT_NEAR(result_c[j], result_opt[j], 1);
84 }
85 }
86
TEST_F(LibYUVBaseTest,TestFixedDiv_Opt)87 TEST_F(LibYUVBaseTest, TestFixedDiv_Opt) {
88 int num[1280];
89 int div[1280];
90 int result_opt[1280];
91 int result_c[1280];
92
93 MemRandomize(reinterpret_cast<uint8*>(&num[0]), sizeof(num));
94 MemRandomize(reinterpret_cast<uint8*>(&div[0]), sizeof(div));
95 for (int j = 0; j < 1280; ++j) {
96 num[j] &= 4095; // Make numerator smaller.
97 div[j] &= 4095; // Make divisor smaller.
98 if (div[j] == 0) {
99 div[j] = 1280;
100 }
101 }
102
103 int has_x86 = TestCpuFlag(kCpuHasX86);
104 for (int i = 0; i < benchmark_pixels_div1280_; ++i) {
105 if (has_x86) {
106 for (int j = 0; j < 1280; ++j) {
107 result_opt[j] = libyuv::FixedDiv(num[j], div[j]);
108 }
109 } else {
110 for (int j = 0; j < 1280; ++j) {
111 result_opt[j] = libyuv::FixedDiv_C(num[j], div[j]);
112 }
113 }
114 }
115 for (int j = 0; j < 1280; ++j) {
116 result_c[j] = libyuv::FixedDiv_C(num[j], div[j]);
117 EXPECT_NEAR(result_c[j], result_opt[j], 1);
118 }
119 }
120
TEST_F(LibYUVBaseTest,TestFixedDiv1_Opt)121 TEST_F(LibYUVBaseTest, TestFixedDiv1_Opt) {
122 int num[1280];
123 int div[1280];
124 int result_opt[1280];
125 int result_c[1280];
126
127 MemRandomize(reinterpret_cast<uint8*>(&num[0]), sizeof(num));
128 MemRandomize(reinterpret_cast<uint8*>(&div[0]), sizeof(div));
129 for (int j = 0; j < 1280; ++j) {
130 num[j] &= 4095; // Make numerator smaller.
131 div[j] &= 4095; // Make divisor smaller.
132 if (div[j] <= 1) {
133 div[j] = 1280;
134 }
135 }
136
137 int has_x86 = TestCpuFlag(kCpuHasX86);
138 for (int i = 0; i < benchmark_pixels_div1280_; ++i) {
139 if (has_x86) {
140 for (int j = 0; j < 1280; ++j) {
141 result_opt[j] = libyuv::FixedDiv1(num[j], div[j]);
142 }
143 } else {
144 for (int j = 0; j < 1280; ++j) {
145 result_opt[j] = libyuv::FixedDiv1_C(num[j], div[j]);
146 }
147 }
148 }
149 for (int j = 0; j < 1280; ++j) {
150 result_c[j] = libyuv::FixedDiv1_C(num[j], div[j]);
151 EXPECT_NEAR(result_c[j], result_opt[j], 1);
152 }
153 }
154
155 } // namespace libyuv
156