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/* Private inline math functions for powerpc.
Copyright (C) 2006
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., 51 Franklin St - Fifth Floor, Boston,
MA 02110-1301 USA */
#ifndef _PPC_MATH_PRIVATE_H_
#define _PPC_MATH_PRIVATE_H_
#include <sysdep.h>
#include <ldsodefs.h>
#include <dl-procinfo.h>
# if __WORDSIZE == 64 || defined _ARCH_PWR4
# define __CPU_HAS_FSQRT 1
# else
# define __CPU_HAS_FSQRT ((GLRO(dl_hwcap) & PPC_FEATURE_64) != 0)
# endif
# ifndef __LIBC_INTERNAL_MATH_INLINES
extern double __slow_ieee754_sqrt (double);
__inline double
__ieee754_sqrt (double __x)
{
double __z;
/* If the CPU is 64-bit we can use the optional FP instructions. */
if (__CPU_HAS_FSQRT)
{
/* Volatile is required to prevent the compiler from moving the
fsqrt instruction above the branch. */
__asm __volatile (
" fsqrt %0,%1\n"
: "=f" (__z)
: "f" (__x));
}
else
__z = __slow_ieee754_sqrt(__x);
return __z;
}
extern float __slow_ieee754_sqrtf (float);
__inline float
__ieee754_sqrtf (float __x)
{
float __z;
/* If the CPU is 64-bit we can use the optional FP instructions. */
if (__CPU_HAS_FSQRT)
{
/* Volatile is required to prevent the compiler from moving the
fsqrts instruction above the branch. */
__asm __volatile (
" fsqrts %0,%1\n"
: "=f" (__z)
: "f" (__x));
}
else
__z = __slow_ieee754_sqrtf(__x);
return __z;
}
#endif /* __LIBC_INTERNAL_MATH_INLINES */
# include_next <math_private.h>
#endif /* _PPC_MATH_PRIVATE_H_ */
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