diff options
Diffstat (limited to 'REORG.TODO/sysdeps/ieee754/ldbl-96/x2y2m1.c')
-rw-r--r-- | REORG.TODO/sysdeps/ieee754/ldbl-96/x2y2m1.c | 39 |
1 files changed, 39 insertions, 0 deletions
diff --git a/REORG.TODO/sysdeps/ieee754/ldbl-96/x2y2m1.c b/REORG.TODO/sysdeps/ieee754/ldbl-96/x2y2m1.c new file mode 100644 index 0000000000..a20e89309e --- /dev/null +++ b/REORG.TODO/sysdeps/ieee754/ldbl-96/x2y2m1.c @@ -0,0 +1,39 @@ +/* Compute x^2 + y^2 - 1, without large cancellation error. + 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 <math_private.h> +#include <float.h> + +#if FLT_EVAL_METHOD == 0 + +# include <sysdeps/ieee754/dbl-64/x2y2m1.c> + +#else + +/* Return X^2 + Y^2 - 1, computed without large cancellation error. + It is given that 1 > X >= Y >= epsilon / 2, and that X^2 + Y^2 >= + 0.5. */ + +double +__x2y2m1 (double x, double y) +{ + return (double) __x2y2m1l (x, y); +} + +#endif |