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/* Copyright (C) 1996-2017 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, see
<http://www.gnu.org/licenses/>. */
#include <math.h>
#include <get-rounding-mode.h>
#include <stdint.h>
#ifndef FUNC
# define FUNC lrint
#endif
#ifndef ITYPE
# define ITYPE double
# define IREG_SIZE 64
#else
# ifndef IREG_SIZE
# error IREG_SIZE not defined
# endif
#endif
#ifndef OTYPE
# define OTYPE long int
# ifdef __ILP32__
# define OREG_SIZE 32
# else
# define OREG_SIZE 64
# endif
#else
# ifndef OREG_SIZE
# error OREG_SIZE not defined
# endif
#endif
#if IREG_SIZE == 32
# define IREGS "s"
#else
# define IREGS "d"
#endif
#if OREG_SIZE == 32
# define OREGS "w"
#else
# define OREGS "x"
#endif
#define __CONCATX(a,b) __CONCAT(a,b)
OTYPE
__CONCATX(__,FUNC) (ITYPE x)
{
OTYPE result;
ITYPE temp;
#if IREG_SIZE == 64 && OREG_SIZE == 32
if (__builtin_fabs (x) > INT32_MAX)
{
/* Converting large values to a 32 bit int may cause the frintx/fcvtza
sequence to set both FE_INVALID and FE_INEXACT. To avoid this
check the rounding mode and do a single instruction with the
appropriate rounding mode. */
switch (get_rounding_mode ())
{
case FE_TONEAREST:
asm volatile ("fcvtns" "\t%" OREGS "0, %" IREGS "1"
: "=r" (result) : "w" (x));
break;
case FE_UPWARD:
asm volatile ("fcvtps" "\t%" OREGS "0, %" IREGS "1"
: "=r" (result) : "w" (x));
break;
case FE_DOWNWARD:
asm volatile ("fcvtms" "\t%" OREGS "0, %" IREGS "1"
: "=r" (result) : "w" (x));
break;
case FE_TOWARDZERO:
default:
asm volatile ("fcvtzs" "\t%" OREGS "0, %" IREGS "1"
: "=r" (result) : "w" (x));
}
return result;
}
#endif
asm ( "frintx" "\t%" IREGS "1, %" IREGS "2\n\t"
"fcvtzs" "\t%" OREGS "0, %" IREGS "1"
: "=r" (result), "=w" (temp) : "w" (x) );
return result;
}
weak_alias (__CONCATX(__,FUNC), FUNC)
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