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| author | Ulrich Drepper <drepper@gmail.com> | 2011-09-07 22:17:33 -0400 |
|---|---|---|
| committer | Ulrich Drepper <drepper@gmail.com> | 2011-09-07 22:17:33 -0400 |
| commit | 3d4837df4ab1a826871e31822694e137779fd7d0 (patch) | |
| tree | 8ee88e3d7bc6aceb1385c58ccf72cc1072200d94 | |
| parent | bd8f72ec2a058e576d8e597914dd5c57ff923e72 (diff) | |
| download | glibc-3d4837df4ab1a826871e31822694e137779fd7d0.tar.gz glibc-3d4837df4ab1a826871e31822694e137779fd7d0.tar.xz glibc-3d4837df4ab1a826871e31822694e137779fd7d0.zip | |
Check for finite/infinity parms in IBM Long Double 128 fmal( )
This patch addresses some IBM Long Double 128 fmal () test-ldouble.out and test-ildoubl.out failures. If the ‘x’ and ‘y’ parameters are finite values and ‘z’ is infinity, the result of fmal () should be ‘z’ not NaN. Conflicts: ChangeLog
| -rw-r--r-- | ChangeLog | 5 | ||||
| -rw-r--r-- | sysdeps/ieee754/ldbl-128ibm/s_fmal.c | 39 |
2 files changed, 44 insertions, 0 deletions
diff --git a/ChangeLog b/ChangeLog index 57d3be93aa..ad81f74820 100644 --- a/ChangeLog +++ b/ChangeLog @@ -23,6 +23,11 @@ * sysdeps/powerpc/powerpc32/ppc-mcount.S (_mcount): Call __mcount_internal with usual JUMPTARGET. Remove useless nop. +2011-08-18 David Flaherty <flaherty@linux.vnet.ibm.com> + + * sysdeps/ieee754/ldbl-128ibm/s_fmal.c: New file which checks + for finite and infinity parameters. + 2011-08-04 Will Schmidt <will_schmidt@vnet.ibm.com> * sysdeps/powerpc/powerpc32/power7/strncmp.S: Adjust the alignment diff --git a/sysdeps/ieee754/ldbl-128ibm/s_fmal.c b/sysdeps/ieee754/ldbl-128ibm/s_fmal.c new file mode 100644 index 0000000000..e59d2c349f --- /dev/null +++ b/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 |