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authorUlrich Drepper <drepper@redhat.com>2004-12-22 20:10:10 +0000
committerUlrich Drepper <drepper@redhat.com>2004-12-22 20:10:10 +0000
commita334319f6530564d22e775935d9c91663623a1b4 (patch)
treeb5877475619e4c938e98757d518bb1e9cbead751 /sysdeps/ieee754/ldbl-128ibm/s_roundl.c
parent0ecb606cb6cf65de1d9fc8a919bceb4be476c602 (diff)
downloadglibc-a334319f6530564d22e775935d9c91663623a1b4.tar.gz
(CFLAGS-tst-align.c): Add -mpreferred-stack-boundary=4.
Diffstat (limited to 'sysdeps/ieee754/ldbl-128ibm/s_roundl.c')
-rw-r--r--sysdeps/ieee754/ldbl-128ibm/s_roundl.c98
1 files changed, 0 insertions, 98 deletions
diff --git a/sysdeps/ieee754/ldbl-128ibm/s_roundl.c b/sysdeps/ieee754/ldbl-128ibm/s_roundl.c
deleted file mode 100644
index 0880e6ee22..0000000000
--- a/sysdeps/ieee754/ldbl-128ibm/s_roundl.c
+++ /dev/null
@@ -1,98 +0,0 @@
-/* Round to int long double floating-point values.
- IBM extended format long double version.
- Copyright (C) 2006 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. */
-
-/* This has been coded in assembler because GCC makes such a mess of it
- when it's coded in C. */
-
-#include <math.h>
-#include <fenv_libc.h>
-#include <math_ldbl_opt.h>
-#include <float.h>
-#include <ieee754.h>
-
-
-#ifdef __STDC__
-long double
-__roundl (long double x)
-#else
-long double
-__roundl (x)
- long double x;
-#endif
-{
- double xh, xl, hi, lo;
-
- ldbl_unpack (x, &xh, &xl);
-
- /* Return Inf, Nan, +/-0 unchanged. */
- if (__builtin_expect (xh != 0.0
- && __builtin_isless (__builtin_fabs (xh),
- __builtin_inf ()), 1))
- {
- double orig_xh;
- int save_round = fegetround ();
-
- /* Long double arithmetic, including the canonicalisation below,
- only works in round-to-nearest mode. */
- fesetround (FE_TONEAREST);
-
- /* Convert the high double to integer. */
- orig_xh = xh;
- hi = ldbl_nearbyint (xh);
-
- /* Subtract integral high part from the value. */
- xh -= hi;
- ldbl_canonicalize (&xh, &xl);
-
- /* Now convert the low double, adjusted for any remainder from the
- high double. */
- lo = ldbl_nearbyint (xh);
-
- /* Adjust the result when the remainder is exactly 0.5. nearbyint
- rounds values halfway between integers to the nearest even
- integer. roundl must round away from zero.
- Also correct cases where nearbyint returns an incorrect value
- for LO. */
- xh -= lo;
- ldbl_canonicalize (&xh, &xl);
- if (xh == 0.5)
- {
- if (xl > 0.0 || (xl == 0.0 && orig_xh > 0.0))
- lo += 1.0;
- }
- else if (-xh == 0.5)
- {
- if (xl < 0.0 || (xl == 0.0 && orig_xh < 0.0))
- lo -= 1.0;
- }
-
- /* Ensure the final value is canonical. In certain cases,
- rounding causes hi,lo calculated so far to be non-canonical. */
- xh = hi;
- xl = lo;
- ldbl_canonicalize (&xh, &xl);
-
- fesetround (save_round);
- }
-
- return ldbl_pack (xh, xl);
-}
-
-long_double_symbol (libm, __roundl, roundl);