diff options
Diffstat (limited to 'REORG.TODO/math/w_llogb_template.c')
| -rw-r--r-- | REORG.TODO/math/w_llogb_template.c | 46 |
1 files changed, 46 insertions, 0 deletions
diff --git a/REORG.TODO/math/w_llogb_template.c b/REORG.TODO/math/w_llogb_template.c new file mode 100644 index 0000000000..3bd92dca2e --- /dev/null +++ b/REORG.TODO/math/w_llogb_template.c @@ -0,0 +1,46 @@ +/* Wrapper to implement llogb in terms of ilogb. + Copyright (C) 2012-2017 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 + <http://www.gnu.org/licenses/>. */ + +#include <math.h> +#include <errno.h> +#include <limits.h> +#include <math_private.h> + +long int +M_DECL_FUNC (__llogb) (FLOAT x) +{ + int r = M_SUF (__ieee754_ilogb) (x); + long int lr = r; + if (__glibc_unlikely (r == FP_ILOGB0) + || __glibc_unlikely (r == FP_ILOGBNAN) + || __glibc_unlikely (r == INT_MAX)) + { +#if LONG_MAX != INT_MAX + if (r == FP_ILOGB0) + lr = FP_LLOGB0; + else if (r == FP_ILOGBNAN) + lr = FP_LLOGBNAN; + else + lr = LONG_MAX; +#endif + __set_errno (EDOM); + __feraiseexcept (FE_INVALID); + } + return lr; +} +declare_mgen_alias (__llogb, llogb) |