glibc/sysdeps/alpha/fpu/s_ceil.c
Richard Henderson 7d84a06715 ¸
1998-08-23  Ricahrd Henderson  <rth@cygnus.com>

	* sysdeps/alpha/elf/crtbegin.S: Fix .prologue; no pv used.
	* sysdeps/alpha/elf/crtend.S: Likewise.
	* sysdeps/alpha/elf/start.S: Likewise.

	* sysdeps/unix/sysv/linux/alpha/rt_sigaction.S: Fix .prologue;
	non-standard pv usage.

	* sysdeps/unix/sysv/linux/alpha/brk.S: Use jmp macro for relaxation.
	* sysdeps/unix/sysv/linux/alpha/getitimer.S: Likewise.
	* sysdeps/unix/sysv/linux/alpha/getrusage.S: Likewise.
	* sysdeps/unix/sysv/linux/alpha/gettimeofday.S: Likewise.
	* sysdeps/unix/sysv/linux/alpha/ieee_get_fp_control.S: Likewise.
	* sysdeps/unix/sysv/linux/alpha/ieee_set_fp_control.S: Likewise.
	* sysdeps/unix/sysv/linux/alpha/select.S: Likewise.
	* sysdeps/unix/sysv/linux/alpha/setitimer.S: Likewise.
	* sysdeps/unix/sysv/linux/alpha/settimeofday.S: Likewise.
	* sysdeps/unix/sysv/linux/alpha/utimes.S: Likewise.
	* sysdeps/unix/sysv/linux/alpha/wait4.S: Likewise.

	* sysdeps/alpha/fpu/e_sqrt.c: Use the asm version when the input is
	a finite non-denormal, deferring to the full IEEE version otherwise.

	* sysdeps/alpha/fpu/bits/mathinline.h (__floorf, __floor):
	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.
1998-08-23 04:10:13 +00:00

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