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author | Richard Henderson <rth@redhat.com> | 2007-03-14 20:01:05 +0000 |
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committer | Richard Henderson <rth@redhat.com> | 2007-03-14 20:01:05 +0000 |
commit | b6df547c34ac9d455c3f416463389f3f8771f069 (patch) | |
tree | 35daa70b489bbfef1ea0d6ab994a0f310b47ce23 /sysdeps/alpha/fpu/s_round.c | |
parent | aea1d19e2f2f6f1b95521c8fbbbddfb92097db60 (diff) | |
download | glibc-b6df547c34ac9d455c3f416463389f3f8771f069.tar.gz glibc-b6df547c34ac9d455c3f416463389f3f8771f069.tar.xz glibc-b6df547c34ac9d455c3f416463389f3f8771f069.zip |
* sysdeps/alpha/fpu/s_llround.c: New file.
* sysdeps/alpha/fpu/s_llroundf.c: New file. * sysdeps/alpha/fpu/s_lround.c: New file. * sysdeps/alpha/fpu/s_lroundf.c: New file. * sysdeps/alpha/fpu/s_round.c: New file. * sysdeps/alpha/fpu/s_roundf.c: New file. * sysdeps/alpha/fpu/s_trunc.c: New file. * sysdeps/alpha/fpu/s_truncf.c: New file. * sysdeps/alpha/fpu/s_llround.c: New file. * sysdeps/alpha/fpu/s_llroundf.c: New file. * sysdeps/alpha/fpu/s_lround.c: New file. * sysdeps/alpha/fpu/s_lroundf.c: New file. * sysdeps/alpha/fpu/s_round.c: New file. * sysdeps/alpha/fpu/s_roundf.c: New file. * sysdeps/alpha/fpu/s_trunc.c: New file. * sysdeps/alpha/fpu/s_truncf.c: New file.
Diffstat (limited to 'sysdeps/alpha/fpu/s_round.c')
-rw-r--r-- | sysdeps/alpha/fpu/s_round.c | 49 |
1 files changed, 49 insertions, 0 deletions
diff --git a/sysdeps/alpha/fpu/s_round.c b/sysdeps/alpha/fpu/s_round.c new file mode 100644 index 0000000000..3999e6110a --- /dev/null +++ b/sysdeps/alpha/fpu/s_round.c @@ -0,0 +1,49 @@ +/* Copyright (C) 2007 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, 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> + + +double +__round (double x) +{ + const double almost_half = 0x1.fffffffffffffp-2; + const double two52 = 0x1.0p52; + double tmp, r; + + __asm ( +#ifdef _IEEE_FP_INEXACT + "addt/suic %2, %3, %1\n\tsubt/suic %1, %3, %0" +#else + "addt/suc %2, %3, %1\n\tsubt/suc %1, %3, %0" +#endif + : "=&f"(r), "=&f"(tmp) + : "f"(fabs (x) + almost_half), "f"(two52)); + + return copysign (r, x); +} + +weak_alias (__round, round) +#ifdef NO_LONG_DOUBLE +strong_alias (__round, __roundl) +weak_alias (__roundl, roundl) +#endif +#if LONG_DOUBLE_COMPAT(libm, GLIBC_2_0) +compat_symbol (libm, __round, roundl, GLIBC_2_0); +#endif |