mirror of
https://sourceware.org/git/glibc.git
synced 2024-12-04 19:00:09 +00:00
d7bb0de178
Early out for -0. Optimize for !_IEEE_FP_INEXACT.
* sysdeps/alpha/fpu/s_floor.c: New.
* sysdeps/alpha/fpu/s_floorf.c: New.
* sysdeps/alpha/fpu/s_ceil.c: New.
* sysdeps/alpha/fpu/s_ceilf.c: New.
59 lines
1.9 KiB
C
59 lines
1.9 KiB
C
/* Copyright (C) 1998 Free Software Foundation, Inc.
|
|
This file is part of the GNU C Library.
|
|
Contributed by Richard Henderson.
|
|
|
|
The GNU C Library is free software; you can redistribute it and/or
|
|
modify it under the terms of the GNU Library General Public License as
|
|
published by the Free Software Foundation; either version 2 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
|
|
Library General Public License for more details.
|
|
|
|
You should have received a copy of the GNU Library General Public
|
|
License along with the GNU C Library; see the file COPYING.LIB. If not,
|
|
write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
|
|
Boston, MA 02111-1307, USA. */
|
|
|
|
#include <math.h>
|
|
|
|
double
|
|
__ceil (double x)
|
|
{
|
|
if (x != 0 && fabs (x) < 9007199254740992.0) /* 1 << DBL_MANT_DIG */
|
|
{
|
|
double tmp1;
|
|
unsigned long fpcr0, fpcr1;
|
|
unsigned long pinf = 3UL << 58;
|
|
|
|
/* Set round to +inf. */
|
|
__asm __volatile("excb; mf_fpcr %0" : "=f"(fpcr0));
|
|
__asm __volatile("mt_fpcr %0; excb" : : "f"(fpcr0 | pinf));
|
|
|
|
/* Calculate! */
|
|
#ifdef _IEEE_FP_INEXACT
|
|
__asm("cvttq/svid %2,%1\n\tcvtqt/suid %1,%0"
|
|
: "=f"(x), "=&f"(tmp1)
|
|
: "f"(x));
|
|
#else
|
|
__asm("cvttq/svd %2,%1\n\tcvtqt/d %1,%0"
|
|
: "=f"(x), "=&f"(tmp1)
|
|
: "f"(x));
|
|
#endif
|
|
|
|
/* Reset rounding mode, while retaining new exception bits. */
|
|
__asm __volatile("excb; mf_fpcr %0" : "=f"(fpcr1));
|
|
fpcr0 = (fpcr0 & pinf) | (fpcr1 & ~pinf);
|
|
__asm __volatile("mt_fpcr %0; excb" : : "f"(fpcr0));
|
|
}
|
|
return x;
|
|
}
|
|
|
|
weak_alias (__ceil, ceil)
|
|
#ifdef NO_LONG_DOUBLE
|
|
strong_alias (__ceil, __ceill)
|
|
weak_alias (__ceil, ceill)
|
|
#endif
|