1// Copyright (c) Microsoft Corporation.
2// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
3
4#ifndef FLOAT_HEX_PRECISION_TO_CHARS_TEST_CASES_HPP
5#define FLOAT_HEX_PRECISION_TO_CHARS_TEST_CASES_HPP
6
7#include <charconv>
8
9#include "test.hpp"
10using namespace std;
11
12inline constexpr FloatPrecisionToCharsTestCase float_hex_precision_to_chars_test_cases[] = {
13 // Test special cases (zero, inf, nan) and an ordinary case. Also test negative signs.
14 {.value: 0.0f, .fmt: chars_format::hex, .precision: 4, .correct: "0.0000p+0"},
15 {.value: -0.0f, .fmt: chars_format::hex, .precision: 4, .correct: "-0.0000p+0"},
16 {.value: float_inf, .fmt: chars_format::hex, .precision: 4, .correct: "inf"},
17 {.value: -float_inf, .fmt: chars_format::hex, .precision: 4, .correct: "-inf"},
18 {.value: float_nan, .fmt: chars_format::hex, .precision: 4, .correct: "nan"},
19 {.value: -float_nan, .fmt: chars_format::hex, .precision: 4, .correct: "-nan(ind)"},
20 {.value: float_nan_payload, .fmt: chars_format::hex, .precision: 4, .correct: "nan"},
21 {.value: -float_nan_payload, .fmt: chars_format::hex, .precision: 4, .correct: "-nan"},
22 {.value: 0x1.729p+0f, .fmt: chars_format::hex, .precision: 4, .correct: "1.7290p+0"},
23 {.value: -0x1.729p+0f, .fmt: chars_format::hex, .precision: 4, .correct: "-1.7290p+0"},
24
25 // Test hexfloat corner cases.
26 {.value: 0x1.728p+0f, .fmt: chars_format::hex, .precision: 6, .correct: "1.728000p+0"},
27 {.value: 0x0.000002p-126f, .fmt: chars_format::hex, .precision: 6, .correct: "0.000002p-126"}, // min subnormal
28 {.value: 0x0.fffffep-126f, .fmt: chars_format::hex, .precision: 6, .correct: "0.fffffep-126"}, // max subnormal
29 {.value: 0x1p-126f, .fmt: chars_format::hex, .precision: 6, .correct: "1.000000p-126"}, // min normal
30 {.value: 0x1.fffffep+127f, .fmt: chars_format::hex, .precision: 6, .correct: "1.fffffep+127"}, // max normal
31
32 // Test hexfloat exponents.
33 {.value: 0x1p-109f, .fmt: chars_format::hex, .precision: 0, .correct: "1p-109"},
34 {.value: 0x1p-99f, .fmt: chars_format::hex, .precision: 0, .correct: "1p-99"},
35 {.value: 0x1p-9f, .fmt: chars_format::hex, .precision: 0, .correct: "1p-9"},
36 {.value: 0x1p+0f, .fmt: chars_format::hex, .precision: 0, .correct: "1p+0"},
37 {.value: 0x1p+9f, .fmt: chars_format::hex, .precision: 0, .correct: "1p+9"},
38 {.value: 0x1p+99f, .fmt: chars_format::hex, .precision: 0, .correct: "1p+99"},
39 {.value: 0x1p+109f, .fmt: chars_format::hex, .precision: 0, .correct: "1p+109"},
40
41 // Test hexfloat hexits.
42 {.value: 0x1.0123p+0f, .fmt: chars_format::hex, .precision: 4, .correct: "1.0123p+0"},
43 {.value: 0x1.4567p+0f, .fmt: chars_format::hex, .precision: 4, .correct: "1.4567p+0"},
44 {.value: 0x1.89abp+0f, .fmt: chars_format::hex, .precision: 4, .correct: "1.89abp+0"},
45 {.value: 0x1.cdefp+0f, .fmt: chars_format::hex, .precision: 4, .correct: "1.cdefp+0"},
46
47 // Test varying precision. Negative precision requests full precision, not shortest round-trip.
48 {.value: 0x1.123456p+0f, .fmt: chars_format::hex, .precision: -2, .correct: "1.123456p+0"},
49 {.value: 0x1.123456p+0f, .fmt: chars_format::hex, .precision: -1, .correct: "1.123456p+0"},
50 {.value: 0x1.123456p+0f, .fmt: chars_format::hex, .precision: 0, .correct: "1p+0"},
51 {.value: 0x1.123456p+0f, .fmt: chars_format::hex, .precision: 1, .correct: "1.1p+0"},
52 {.value: 0x1.123456p+0f, .fmt: chars_format::hex, .precision: 2, .correct: "1.12p+0"},
53 {.value: 0x1.123456p+0f, .fmt: chars_format::hex, .precision: 3, .correct: "1.123p+0"},
54 {.value: 0x1.123456p+0f, .fmt: chars_format::hex, .precision: 4, .correct: "1.1234p+0"},
55 {.value: 0x1.123456p+0f, .fmt: chars_format::hex, .precision: 5, .correct: "1.12345p+0"},
56 {.value: 0x1.123456p+0f, .fmt: chars_format::hex, .precision: 6, .correct: "1.123456p+0"},
57 {.value: 0x1.123456p+0f, .fmt: chars_format::hex, .precision: 7, .correct: "1.1234560p+0"},
58 {.value: 0x1.123456p+0f, .fmt: chars_format::hex, .precision: 8, .correct: "1.12345600p+0"},
59 {.value: 0x1.123456p+0f, .fmt: chars_format::hex, .precision: 9, .correct: "1.123456000p+0"},
60
61 // Test rounding at every position.
62 {.value: 0x1.ccccccp+0f, .fmt: chars_format::hex, .precision: 0, .correct: "2p+0"},
63 {.value: 0x1.ccccccp+0f, .fmt: chars_format::hex, .precision: 1, .correct: "1.dp+0"},
64 {.value: 0x1.ccccccp+0f, .fmt: chars_format::hex, .precision: 2, .correct: "1.cdp+0"},
65 {.value: 0x1.ccccccp+0f, .fmt: chars_format::hex, .precision: 3, .correct: "1.ccdp+0"},
66 {.value: 0x1.ccccccp+0f, .fmt: chars_format::hex, .precision: 4, .correct: "1.cccdp+0"},
67 {.value: 0x1.ccccccp+0f, .fmt: chars_format::hex, .precision: 5, .correct: "1.ccccdp+0"},
68 {.value: 0x1.ccccccp+0f, .fmt: chars_format::hex, .precision: 6, .correct: "1.ccccccp+0"},
69
70 // Test all combinations of least significant bit, round bit, and trailing bits.
71 {.value: 0x1.04000p+0f, .fmt: chars_format::hex, .precision: 2, .correct: "1.04p+0"}, // Lsb 0, Round 0, Trailing 0
72 {.value: 0x1.04001p+0f, .fmt: chars_format::hex, .precision: 2, .correct: "1.04p+0"}, // Lsb 0, Round 0 and Trailing 1 in different hexits
73 {.value: 0x1.04200p+0f, .fmt: chars_format::hex, .precision: 2, .correct: "1.04p+0"}, // Lsb 0, Round 0 and Trailing 1 in same hexit
74 {.value: 0x1.04800p+0f, .fmt: chars_format::hex, .precision: 2, .correct: "1.04p+0"}, // Lsb 0, Round 1, Trailing 0
75 {.value: 0x1.04801p+0f, .fmt: chars_format::hex, .precision: 2, .correct: "1.05p+0"}, // Lsb 0, Round 1 and Trailing 1 in different hexits
76 {.value: 0x1.04900p+0f, .fmt: chars_format::hex, .precision: 2, .correct: "1.05p+0"}, // Lsb 0, Round 1 and Trailing 1 in same hexit
77 {.value: 0x1.05000p+0f, .fmt: chars_format::hex, .precision: 2, .correct: "1.05p+0"}, // Lsb 1, Round 0, Trailing 0
78 {.value: 0x1.05001p+0f, .fmt: chars_format::hex, .precision: 2, .correct: "1.05p+0"}, // Lsb 1, Round 0 and Trailing 1 in different hexits
79 {.value: 0x1.05200p+0f, .fmt: chars_format::hex, .precision: 2, .correct: "1.05p+0"}, // Lsb 1, Round 0 and Trailing 1 in same hexit
80 {.value: 0x1.05800p+0f, .fmt: chars_format::hex, .precision: 2, .correct: "1.06p+0"}, // Lsb 1, Round 1, Trailing 0
81 {.value: 0x1.05801p+0f, .fmt: chars_format::hex, .precision: 2, .correct: "1.06p+0"}, // Lsb 1, Round 1 and Trailing 1 in different hexits
82 {.value: 0x1.05900p+0f, .fmt: chars_format::hex, .precision: 2, .correct: "1.06p+0"}, // Lsb 1, Round 1 and Trailing 1 in same hexit
83
84 // Test carry propagation.
85 {.value: 0x1.0afffep+0f, .fmt: chars_format::hex, .precision: 5, .correct: "1.0b000p+0"},
86
87 // Test carry propagation into the leading hexit.
88 {.value: 0x0.fffffep-126f, .fmt: chars_format::hex, .precision: 5, .correct: "1.00000p-126"},
89 {.value: 0x1.fffffep+127f, .fmt: chars_format::hex, .precision: 5, .correct: "2.00000p+127"},
90
91 // Test how the leading hexit participates in the rounding decision.
92 {.value: 0x0.000p+0f, .fmt: chars_format::hex, .precision: 0, .correct: "0p+0"},
93 {.value: 0x0.001p-126f, .fmt: chars_format::hex, .precision: 0, .correct: "0p-126"},
94 {.value: 0x0.200p-126f, .fmt: chars_format::hex, .precision: 0, .correct: "0p-126"},
95 {.value: 0x0.800p-126f, .fmt: chars_format::hex, .precision: 0, .correct: "0p-126"},
96 {.value: 0x0.801p-126f, .fmt: chars_format::hex, .precision: 0, .correct: "1p-126"},
97 {.value: 0x0.900p-126f, .fmt: chars_format::hex, .precision: 0, .correct: "1p-126"},
98 {.value: 0x1.000p+0f, .fmt: chars_format::hex, .precision: 0, .correct: "1p+0"},
99 {.value: 0x1.001p+0f, .fmt: chars_format::hex, .precision: 0, .correct: "1p+0"},
100 {.value: 0x1.200p+0f, .fmt: chars_format::hex, .precision: 0, .correct: "1p+0"},
101 {.value: 0x1.800p+0f, .fmt: chars_format::hex, .precision: 0, .correct: "2p+0"},
102 {.value: 0x1.801p+0f, .fmt: chars_format::hex, .precision: 0, .correct: "2p+0"},
103 {.value: 0x1.900p+0f, .fmt: chars_format::hex, .precision: 0, .correct: "2p+0"},
104};
105
106#endif // FLOAT_HEX_PRECISION_TO_CHARS_TEST_CASES_HPP
107

source code of libcxx/test/std/utilities/charconv/charconv.msvc/float_hex_precision_to_chars_test_cases.hpp