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author | joseph <joseph@7b3dc134-2b1b-0410-93df-9e9f96275f8d> | 2011-10-25 00:37:10 +0000 |
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committer | joseph <joseph@7b3dc134-2b1b-0410-93df-9e9f96275f8d> | 2011-10-25 00:37:10 +0000 |
commit | 4bbe4e2185c5484328182720ff7b3bb4f9593bff (patch) | |
tree | cd67e40a74928c0f58d4f5b79d2e260e4099fee7 /libc/sysdeps/ieee754/ldbl-128ibm/s_fmal.c | |
parent | 91b4be71461f78cabe1fb5f164cea71b60e9e98a (diff) | |
download | eglibc2-4bbe4e2185c5484328182720ff7b3bb4f9593bff.tar.gz |
Merge changes between r15223 and r15532 from /fsf/trunk.
git-svn-id: svn://svn.eglibc.org/trunk@15545 7b3dc134-2b1b-0410-93df-9e9f96275f8d
Diffstat (limited to 'libc/sysdeps/ieee754/ldbl-128ibm/s_fmal.c')
-rw-r--r-- | libc/sysdeps/ieee754/ldbl-128ibm/s_fmal.c | 39 |
1 files changed, 39 insertions, 0 deletions
diff --git a/libc/sysdeps/ieee754/ldbl-128ibm/s_fmal.c b/libc/sysdeps/ieee754/ldbl-128ibm/s_fmal.c new file mode 100644 index 000000000..e59d2c349 --- /dev/null +++ b/libc/sysdeps/ieee754/ldbl-128ibm/s_fmal.c @@ -0,0 +1,39 @@ +/* Compute x * y + z as ternary operation. + Copyright (C) 2011 Free Software Foundation, Inc. + This file is part of the GNU C Library. + Contributed by David Flaherty <flaherty@linux.vnet.ibm.com>. + + 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, write to the Free + Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA + 02111-1307 USA. */ + +#include <math.h> +#include <math_ldbl_opt.h> + +long double +__fmal (long double x, long double y, long double z) +{ + /* An IBM long double 128 is really just 2 IEEE64 doubles, and in + * the case of inf/nan only the first double counts. So we use the + * (double) cast to avoid any data movement. */ + if ((finite ((double)x) && finite ((double)y)) && isinf ((double)z)) + return (z); + + return (x * y) + z; +} +#ifdef IS_IN_libm +long_double_symbol (libm, __fmal, fmal); +#else +long_double_symbol (libc, __fmal, fmal); +#endif |