diff options
Diffstat (limited to 'sysdeps/ieee754/soft-fp/s_fsqrt.c')
| -rw-r--r-- | sysdeps/ieee754/soft-fp/s_fsqrt.c | 54 |
1 files changed, 54 insertions, 0 deletions
diff --git a/sysdeps/ieee754/soft-fp/s_fsqrt.c b/sysdeps/ieee754/soft-fp/s_fsqrt.c new file mode 100644 index 0000000000..b6f7c4e962 --- /dev/null +++ b/sysdeps/ieee754/soft-fp/s_fsqrt.c @@ -0,0 +1,54 @@ +/* Square root of double value, narrowing the result to float, using soft-fp. + Copyright (C) 2021 Free Software Foundation, Inc. + This file is part of the GNU C Library. + + The GNU C Library is free software; you can redistribute it and/or + modify it under the terms of the GNU Lesser General Public + License as published by the Free Software Foundation; either + version 2.1 of the License, or (at your option) any later version. + + The GNU C Library is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public + License along with the GNU C Library; if not, see + <https://www.gnu.org/licenses/>. */ + +#define f32sqrtf64 __hide_f32sqrtf64 +#define f32sqrtf32x __hide_f32sqrtf32x +#define fsqrtl __hide_fsqrtl +#include <math.h> +#undef f32sqrtf64 +#undef f32sqrtf32x +#undef fsqrtl + +#include <math-narrow.h> +#include <soft-fp.h> +#include <single.h> +#include <double.h> + +float +__fsqrt (double x) +{ + FP_DECL_EX; + FP_DECL_D (X); + FP_DECL_D (R); + FP_DECL_S (RN); + float ret; + + FP_INIT_ROUNDMODE; + FP_UNPACK_D (X, x); + FP_SQRT_D (R, X); +#if _FP_W_TYPE_SIZE < _FP_FRACBITS_D + FP_TRUNC_COOKED (S, D, 1, 2, RN, R); +#else + FP_TRUNC_COOKED (S, D, 1, 1, RN, R); +#endif + FP_PACK_S (ret, RN); + FP_HANDLE_EXCEPTIONS; + CHECK_NARROW_SQRT (ret, x); + return ret; +} +libm_alias_float_double (sqrt) |