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author | Richard Maw <richard.maw@codethink.co.uk> | 2012-01-17 14:43:55 +0000 |
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committer | Richard Maw <richard.maw@codethink.co.uk> | 2012-01-17 14:43:55 +0000 |
commit | 2de9abc5c9d40b3c716307d67d16146f823fd554 (patch) | |
tree | 6979db67934ddc8b564150b465846a383b428ff8 /gnulib/lib/copysignl.c | |
parent | 33cc1c6fda6e72a7bae1401e9b2cec495a4d3ff1 (diff) | |
download | patch-baserock/bootstrap.tar.gz |
add the output of bootstrapbaserock/bootstrap-pass2baserock/bootstrap
Diffstat (limited to 'gnulib/lib/copysignl.c')
m--------- | gnulib | 0 | ||||
-rw-r--r-- | gnulib/lib/copysignl.c | 72 |
2 files changed, 72 insertions, 0 deletions
diff --git a/gnulib b/gnulib deleted file mode 160000 -Subproject 443bc5ffcf7429e557f4a371b0661abe98ddbc1 diff --git a/gnulib/lib/copysignl.c b/gnulib/lib/copysignl.c new file mode 100644 index 0000000..4432577 --- /dev/null +++ b/gnulib/lib/copysignl.c @@ -0,0 +1,72 @@ +/* Copy sign into another 'long double' number. + Copyright (C) 2011 Free Software Foundation, Inc. + + This program is free software: you can redistribute it and/or modify + it under the terms of the GNU General Public License as published by + the Free Software Foundation; either version 3 of the License, or + (at your option) any later version. + + This program 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 General Public License for more details. + + You should have received a copy of the GNU General Public License + along with this program. If not, see <http://www.gnu.org/licenses/>. */ + +#include <config.h> + +/* Specification. */ +#include <math.h> + +#if HAVE_SAME_LONG_DOUBLE_AS_DOUBLE + +long double +copysignl (long double x, long double y) +{ + return copysign (x, y); +} + +#else + +# if defined __hpux && !defined __GNUC__ + +# include <float.h> + +/* HP cc on HP-UX 10.20 has a bug with the constant expression -0.0L. */ +static long double +compute_minus_zerol (void) +{ + return -LDBL_MIN * LDBL_MIN; +} +# define minus_zerol compute_minus_zerol () + +/* HP cc on HP-UX 11 has a bug: When x is a positive zero, - x comes out + as a positive zero, rather than as a minus zero. Work around it. */ +static long double +unary_minus (long double x) +{ + if (x == 0.0L) + { + if (signbit (x)) + return 0.0L; + else + return minus_zerol; + } + else + return - x; +} + +# endif + +long double +copysignl (long double x, long double y) +{ +# if defined __hpux && !defined __GNUC__ + return (signbit (x) != signbit (y) ? unary_minus (x) : x); +# else + return (signbit (x) != signbit (y) ? - x : x); +# endif +} + +#endif |