mirror of
https://sourceware.org/git/glibc.git
synced 2024-12-04 19:00:09 +00:00
b7434f8243
* sysdeps/alpha/fpu/s_ceil.c: Use round to -inf instead of playing
with the fpcr. Protect from INV exception.
* sysdeps/alpha/fpu/s_ceilf.c: Likewise.
* sysdeps/alpha/fpu/s_floor.c: Protect from INV exception.
* sysdeps/alpha/fpu/s_floorf.c: Likewise.
* sysdeps/alpha/fpu/s_copysign.c: New.
* sysdeps/alpha/fpu/s_copysignf.c: New.
* sysdeps/alpha/fpu/s_fabs.c: New.
* sysdeps/alpha/fpu/s_fabsf.c: New.
* sysdeps/alpha/fpu/s_rint.c: New.
* sysdeps/alpha/fpu/s_rintf.c: New.
* sysdeps/alpha/fpu/fraiseexcpt.c: Use get/set_fp_control instead
of arithmetic instructions.
* sysdeps/alpha/fpu/s_ceil.c: Use round to -inf instead of playing
with the fpcr. Protect from INV exception.
* sysdeps/alpha/fpu/s_ceilf.c: Likewise.
* sysdeps/alpha/fpu/s_floor.c: Protect from INV exception.
* sysdeps/alpha/fpu/s_floorf.c: Likewise.
* sysdeps/alpha/fpu/s_copysign.c: New.
* sysdeps/alpha/fpu/s_copysignf.c: New.
* sysdeps/alpha/fpu/s_fabs.c: New.
* sysdeps/alpha/fpu/s_fabsf.c: New.
* sysdeps/alpha/fpu/s_rint.c: New.
* sysdeps/alpha/fpu/s_rintf.c: New.
53 lines
1.7 KiB
C
53 lines
1.7 KiB
C
/* Copyright (C) 2000 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>
|
|
|
|
|
|
float
|
|
__rintf (float x)
|
|
{
|
|
if (isless (fabsf (x), 16777216.0f)) /* 1 << FLT_MANT_DIG */
|
|
{
|
|
/* Note that Alpha S_Floating is stored in registers in a
|
|
restricted T_Floating format, so we don't even need to
|
|
convert back to S_Floating in the end. The initial
|
|
conversion to T_Floating is needed to handle denormals. */
|
|
|
|
float tmp1, tmp2, new_x;
|
|
|
|
__asm ("cvtst/s %3,%2\n\t"
|
|
#ifdef _IEEE_FP_INEXACT
|
|
"cvttq/svid %2,%1\n\t"
|
|
#else
|
|
"cvttq/svd %2,%1\n\t"
|
|
#endif
|
|
"cvtqt/d %1,%0\n\t"
|
|
: "=f"(new_x), "=&f"(tmp1), "=&f"(tmp2)
|
|
: "f"(x));
|
|
|
|
/* rint(-0.1) == -0, and in general we'll always have the same
|
|
sign as our input. */
|
|
x = copysignf(new_x, x);
|
|
}
|
|
return x;
|
|
}
|
|
|
|
weak_alias (__rintf, rintf)
|