1 /* Single-precision math error handling.
2 Copyright (C) 2017-2024 Free Software Foundation, Inc.
3 This file is part of the GNU C Library.
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.
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.
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/>. */
19 #include "math_config.h"
23 /* NOINLINE reduces code size. */
25 with_errnof (float y
, int e
)
31 # define with_errnof(x, e) (x)
34 attribute_hidden
float
35 __math_edomf (float y
)
37 return with_errnof (y
, EDOM
);
40 /* NOINLINE prevents fenv semantics breaking optimizations. */
42 xflowf (uint32_t sign
, float y
)
44 y
= (sign
? -y
: y
) * y
;
45 return with_errnof (y
, ERANGE
);
48 attribute_hidden
float
49 __math_uflowf (uint32_t sign
)
51 return xflowf (sign
, 0x1p
-95f
);
55 /* Underflows to zero in some non-nearest rounding mode, setting errno
56 is valid even if the result is non-zero, but in the subnormal range. */
57 attribute_hidden
float
58 __math_may_uflowf (uint32_t sign
)
60 return xflowf (sign
, 0x1.4p
-75f
);
64 attribute_hidden
float
65 __math_oflowf (uint32_t sign
)
67 return xflowf (sign
, 0x1p
97f
);
70 attribute_hidden
float
71 __math_divzerof (uint32_t sign
)
74 return with_errnof ((sign
? -1 : 1) / y
, ERANGE
);
77 attribute_hidden
float
78 __math_invalidf (float x
)
80 float y
= (x
- x
) / (x
- x
);
81 return isnan (x
) ? y
: with_errnof (y
, EDOM
);