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/* Inline math functions for powerpc.
Copyright (C) 1995, 1996, 1997 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 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. */
#ifndef __MATH_H
#define __MATH_H
#ifdef __GNUC__
#ifndef __NO_MATH_INLINES
#ifdef __cplusplus
#define __MATH_INLINE __inline
#else
#define __MATH_INLINE extern __inline
#endif
__MATH_INLINE double __sgn1 (double __x);
__MATH_INLINE double
__sgn1 (double __x)
{
return __x >= 0.0 ? 1.0 : -1.0;
}
/* We'd want to use this if it was implemented in hardware, but
how can we tell? */
#if 0
__MATH_INLINE double sqrt (double __x);
__MATH_INLINE double
sqrt (double __x)
{
register double __value;
__asm
("fsqrt %0,%1"
: "=f" (__value) : "f" (__x));
return __value;
}
#endif
__MATH_INLINE double fabs (double __x);
__MATH_INLINE double
fabs (double __x)
{
register double __value;
__asm
("fabs %0,%1"
: "=f" (__value) : "f" (__x));
return __value;
}
/* Optimized versions for some non-standardized functions. */
#ifdef __USE_MISC
__MATH_INLINE double hypot (double __x, double __y);
__MATH_INLINE double
hypot (double __x, double __y)
{
return sqrt (__x * __x + __y * __y);
}
__MATH_INLINE double __sgn (double __x);
__MATH_INLINE double
sgn (double __x)
{
return (__x == 0.0 ? 0.0 : (__x > 0.0 ? 1.0 : -1.0));
}
#endif /* __USE_MISC */
#endif /* __NO_MATH_INLINES */
#endif /* __GNUC__ */
#endif /* __MATH_H */
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