1 | /* Test that tininess.h is correct for this architecture. |
2 | Copyright (C) 2012-2022 Free Software Foundation, Inc. |
3 | This file is part of the GNU C Library. |
4 | |
5 | The GNU C Library is free software; you can redistribute it and/or |
6 | modify it under the terms of the GNU Lesser General Public |
7 | License as published by the Free Software Foundation; either |
8 | version 2.1 of the License, or (at your option) any later version. |
9 | |
10 | The GNU C Library is distributed in the hope that it will be useful, |
11 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
13 | Lesser General Public License for more details. |
14 | |
15 | You should have received a copy of the GNU Lesser General Public |
16 | License along with the GNU C Library; if not, see |
17 | <https://www.gnu.org/licenses/>. */ |
18 | |
19 | #include <fenv.h> |
20 | #include <float.h> |
21 | #include <stdio.h> |
22 | #include <tininess.h> |
23 | |
24 | volatile float a = 0x1.fffp-126; |
25 | volatile float b = 0x1.0008p-1; |
26 | volatile float c; |
27 | volatile float m = FLT_MIN; |
28 | volatile float mm; |
29 | |
30 | static int |
31 | do_test (void) |
32 | { |
33 | int result = 0; |
34 | #ifdef FE_UNDERFLOW |
35 | feclearexcept (FE_ALL_EXCEPT); |
36 | mm = m * m; |
37 | if (!fetestexcept (FE_UNDERFLOW)) |
38 | { |
39 | puts (s: "underflow exception not supported at runtime, cannot test" ); |
40 | return 0; |
41 | } |
42 | feclearexcept (FE_ALL_EXCEPT); |
43 | c = a * b; |
44 | if (fetestexcept (FE_UNDERFLOW)) |
45 | { |
46 | if (TININESS_AFTER_ROUNDING) |
47 | { |
48 | puts (s: "tininess.h says after rounding, " |
49 | "but detected before rounding" ); |
50 | result = 1; |
51 | } |
52 | } |
53 | else |
54 | { |
55 | if (!TININESS_AFTER_ROUNDING) |
56 | { |
57 | puts (s: "tininess.h says before rounding, " |
58 | "but detected after rounding" ); |
59 | result = 1; |
60 | } |
61 | } |
62 | #else |
63 | puts ("underflow exception not supported at compile time, cannot test" ); |
64 | #endif |
65 | return result; |
66 | } |
67 | |
68 | #define TEST_FUNCTION do_test () |
69 | #include "../test-skeleton.c" |
70 | |