1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
|
/*
* Copyright © 2015 Intel Corporation
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice (including the next
* paragraph) shall be included in all copies or substantial portions of the
* Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
* IN THE SOFTWARE.
*/
#include <stdio.h>
#include <stdbool.h>
#include <string.h>
#include <math.h>
#include "macros.h"
#include "rounding.h"
#include <gtest/gtest.h>
TEST(Rounding, RoundevenFloat)
{
const struct {
float input, expected;
} float_data[] = {
{ 0.0, 0.0 },
{ nextafterf(0.5, 0.0), 0.0 },
{ 0.5, 0.0 },
{ nextafterf(0.5, 1.0), 1.0 },
{ 1.0, 1.0 },
{ nextafterf(1.5, 1.0), 1.0 },
{ 1.5, 2.0 },
{ nextafterf(1.5, 2.0), 2.0 },
{ 2.0, 2.0 },
{ nextafterf(2.5, 2.0), 2.0 },
{ 2.5, 2.0 },
{ nextafterf(2.5, 3.0), 3.0 },
};
for (unsigned i = 0; i < ARRAY_SIZE(float_data); i++) {
float output = _mesa_roundevenf(float_data[i].input);
EXPECT_TRUE(memcmp(&float_data[i].expected, &output, sizeof(float)) == 0)
<< "Subtest " << i << " float value: expected " << float_data[i].expected << " from "
<< "_mesa_roundevenf(" << float_data[i].input << " but got " << output << "\n";
}
// Test negated values.
for (unsigned i = 0; i < ARRAY_SIZE(float_data); i++) {
float output = _mesa_roundevenf(-float_data[i].input);
float negated_expected = -float_data[i].expected;
EXPECT_TRUE(memcmp(&negated_expected, &output, sizeof(float)) == 0)
<< "Subtest " << i << " float value: expected " << negated_expected << " from "
<< "_mesa_roundevenf(" << -float_data[i].input << " but got " << output << "\n";
}
}
TEST(Rounding, RoundevenDouble)
{
const struct {
double input, expected;
} double_data[] = {
{ 0.0, 0.0 },
{ nextafter(0.5, 0.0), 0.0 },
{ 0.5, 0.0 },
{ nextafter(0.5, 1.0), 1.0 },
{ 1.0, 1.0 },
{ nextafter(1.5, 1.0), 1.0 },
{ 1.5, 2.0 },
{ nextafter(1.5, 2.0), 2.0 },
{ 2.0, 2.0 },
{ nextafter(2.5, 2.0), 2.0 },
{ 2.5, 2.0 },
{ nextafter(2.5, 3.0), 3.0 },
};
for (unsigned i = 0; i < ARRAY_SIZE(double_data); i++) {
double output = _mesa_roundeven(double_data[i].input);
EXPECT_TRUE(memcmp(&double_data[i].expected, &output, sizeof(double)) == 0)
<< "Subtest " << i << " double value: expected " << double_data[i].expected << " from "
<< "_mesa_roundeven(" << double_data[i].input << " but got " << output << "\n";
}
// Test negated values.
for (unsigned i = 0; i < ARRAY_SIZE(double_data); i++) {
double output = _mesa_roundeven(-double_data[i].input);
double negated_expected = -double_data[i].expected;
EXPECT_TRUE(memcmp(&negated_expected, &output, sizeof(double)) == 0)
<< "Subtest " << i << " double value: expected " << negated_expected << " from "
<< "_mesa_roundeven(" << -double_data[i].input << " but got " << output << "\n";
}
}
|
