diff options
author | Carmelo Amoroso <carmelo.amoroso@st.com> | 2010-11-28 21:09:47 +0100 |
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committer | Carmelo Amoroso <carmelo.amoroso@st.com> | 2010-11-28 21:09:47 +0100 |
commit | 57f6cce72c889f2e7b342e87a565a064320a6ee2 (patch) | |
tree | 5466406472918d3adb63398f5fb9ea1511a5e73f /libc/sysdeps/linux/sparc/soft-fp/q_util.c | |
parent | 4ec89b87bc0eea8d9ca6b50564d12eeb3b1b0119 (diff) | |
parent | 5dea871ac73ef4608022c058b50adc946917f9b9 (diff) |
Merge commit 'origin/master' into prelink
Conflicts:
ldso/include/dl-hash.h
Signed-off-by: Carmelo Amoroso <carmelo.amoroso@st.com>
Diffstat (limited to 'libc/sysdeps/linux/sparc/soft-fp/q_util.c')
-rw-r--r-- | libc/sysdeps/linux/sparc/soft-fp/q_util.c | 57 |
1 files changed, 57 insertions, 0 deletions
diff --git a/libc/sysdeps/linux/sparc/soft-fp/q_util.c b/libc/sysdeps/linux/sparc/soft-fp/q_util.c new file mode 100644 index 000000000..41ecd685d --- /dev/null +++ b/libc/sysdeps/linux/sparc/soft-fp/q_util.c @@ -0,0 +1,57 @@ +/* Software floating-point emulation. + Helper routine for _Q_* routines. + Simulate exceptions using double arithmetics. + Copyright (C) 1999 Free Software Foundation, Inc. + This file is part of the GNU C Library. + Contributed by Jakub Jelinek (jj@ultra.linux.cz). + + 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 "soft-fp.h" + +unsigned long long ___Q_numbers [] = { +0x0000000000000000ULL, /* Zero */ +0x0010100000000000ULL, /* Very tiny number */ +0x0010000000000000ULL, /* Minimum normalized number */ +0x7fef000000000000ULL, /* A huge double number */ +}; + +double ___Q_simulate_exceptions(int exceptions) +{ + double d, *p = (double *)___Q_numbers; + if (exceptions & FP_EX_INVALID) + d = p[0]/p[0]; + if (exceptions & FP_EX_OVERFLOW) + { + d = p[3] + p[3]; + exceptions &= ~FP_EX_INEXACT; + } + if (exceptions & FP_EX_UNDERFLOW) + { + if (exceptions & FP_EX_INEXACT) + { + d = p[2] * p[2]; + exceptions &= ~FP_EX_INEXACT; + } + else + d = p[1] - p[2]; + } + if (exceptions & FP_EX_DIVZERO) + d = 1.0/p[0]; + if (exceptions & FP_EX_INEXACT) + d = p[3] - p[2]; + return d; +} |