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/* Inline math functions for x86-64.
Copyright (C) 2002-2004, 2007, 2009, 2011 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. */
#ifndef _MATH_H
# error "Never use <bits/mathinline.h> directly; include <math.h> instead."
#endif
#include <bits/wordsize.h>
#ifndef __extern_always_inline
# define __MATH_INLINE __inline
#else
# define __MATH_INLINE __extern_always_inline
#endif
#if defined __USE_ISOC99 && defined __GNUC__ && __GNUC__ >= 2
/* Test for negative number. Used in the signbit() macro. */
__MATH_INLINE int
__NTH (__signbitf (float __x))
{
# if __WORDSIZE == 32
__extension__ union { float __f; int __i; } __u = { __f: __x };
return __u.__i < 0;
# else
int __m;
__asm ("pmovmskb %1, %0" : "=r" (__m) : "x" (__x));
return __m & 0x8;
# endif
}
__MATH_INLINE int
__NTH (__signbit (double __x))
{
# if __WORDSIZE == 32
__extension__ union { double __d; int __i[2]; } __u = { __d: __x };
return __u.__i[1] < 0;
# else
int __m;
__asm ("pmovmskb %1, %0" : "=r" (__m) : "x" (__x));
return __m & 0x80;
# endif
}
__MATH_INLINE int
__NTH (__signbitl (long double __x))
{
__extension__ union { long double __l; int __i[3]; } __u = { __l: __x };
return (__u.__i[2] & 0x8000) != 0;
}
#ifdef __USE_ISOC99
__BEGIN_NAMESPACE_C99
/* Round to nearest integer. */
# if __WORDSIZE == 64 || defined __SSE_MATH__
__MATH_INLINE long int
__NTH (lrintf (float __x))
{
long int __res;
asm ("cvtss2si %1, %0" : "=r" (__res) : "xm" (__x));
return __res;
}
# endif
# if __WORDSIZE == 64 || defined __SSE2_MATH__
__MATH_INLINE long int
__NTH (lrint (double __x))
{
long int __res;
asm ("cvtsd2si %1, %0" : "=r" (__res) : "xm" (__x));
return __res;
}
# endif
# if __WORDSIZE == 64
__MATH_INLINE long long int
__NTH (llrintf (float __x))
{
long long int __res;
asm ("cvtss2si %1, %0" : "=r" (__res) : "xm" (__x));
return __res;
}
__MATH_INLINE long long int
__NTH (llrint (double __x))
{
long long int __res;
asm ("cvtsd2si %1, %0" : "=r" (__res) : "xm" (__x));
return __res;
}
# endif
# if __FINITE_MATH_ONLY__ == 1 && (__WORDSIZE == 64 || defined __SSE2_MATH__)
/* Determine maximum of two values. */
__MATH_INLINE float
__NTH (fmaxf (float __x, float __y))
{
asm ("maxss %1, %0" : "+x" (__x) : "xm" (__y));
return __x;
}
__MATH_INLINE double
__NTH (fmax (double __x, double __y))
{
asm ("maxsd %1, %0" : "+x" (__x) : "xm" (__y));
return __x;
}
/* Determine minimum of two values. */
__MATH_INLINE float
__NTH (fminf (float __x, float __y))
{
asm ("minss %1, %0" : "+x" (__x) : "xm" (__y));
return __x;
}
__MATH_INLINE double
__NTH (fmin (double __x, double __y))
{
asm ("minsd %1, %0" : "+x" (__x) : "xm" (__y));
return __x;
}
# endif
__END_NAMESPACE_C99
# endif
#endif
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