| 1 | /* Euclidean distance function. Float/Binary32 version. |
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| 2 | Copyright (C) 2012-2022 Free Software Foundation, Inc. |
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| 3 | This file is part of the GNU C Library. |
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| 4 | |
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| 5 | The GNU C Library is free software; you can redistribute it and/or |
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| 6 | modify it under the terms of the GNU Lesser General Public |
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| 7 | License as published by the Free Software Foundation; either |
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| 8 | version 2.1 of the License, or (at your option) any later version. |
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| 9 | |
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| 10 | The GNU C Library is distributed in the hope that it will be useful, |
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| 11 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
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| 12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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| 13 | Lesser General Public License for more details. |
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| 14 | |
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| 15 | You should have received a copy of the GNU Lesser General Public |
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| 16 | License along with the GNU C Library; if not, see |
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| 17 | <https://www.gnu.org/licenses/>. */ |
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| 18 | |
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| 19 | #include <errno.h> |
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| 20 | #include <libm-alias-finite.h> |
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| 21 | #include <libm-alias-float.h> |
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| 22 | #include <math-svid-compat.h> |
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| 23 | #include <math.h> |
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| 24 | #include <math-narrow-eval.h> |
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| 25 | #include <math_private.h> |
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| 26 | |
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| 27 | float |
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| 28 | __hypotf (float x, float y) |
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| 29 | { |
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| 30 | if (!isfinite (x) || !isfinite (y)) |
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| 31 | { |
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| 32 | if ((isinf (x) || isinf (y)) |
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| 33 | && !issignaling (x) && !issignaling (y)) |
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| 34 | return INFINITY; |
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| 35 | return x + y; |
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| 36 | } |
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| 37 | |
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| 38 | float r = math_narrow_eval ((float) sqrt ((double) x * (double) x |
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| 39 | + (double) y * (double) y)); |
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| 40 | if (!isfinite (r)) |
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| 41 | __set_errno (ERANGE); |
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| 42 | return r; |
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| 43 | } |
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| 44 | strong_alias (__hypotf, __ieee754_hypotf) |
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| 45 | #if LIBM_SVID_COMPAT |
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| 46 | versioned_symbol (libm, __hypotf, hypotf, GLIBC_2_35); |
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| 47 | libm_alias_float_other (__hypot, hypot) |
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| 48 | #else |
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| 49 | libm_alias_float (__hypot, hypot) |
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| 50 | #endif |
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| 51 | libm_alias_finite (__ieee754_hypotf, __hypotf) |
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| 52 | |
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