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/* Inline math functions for powerpc.
Copyright (C) 1995, 1996, 1997, 1998, 1999, 2000, 2004, 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, see
<http://www.gnu.org/licenses/>. */
#include <features.h>
#ifndef _MATH_H
# error "Never use <bits/mathinline.h> directly; include <math.h> instead."
#endif
#ifdef __cplusplus
# define __MATH_INLINE __inline
#else
# define __MATH_INLINE __extern_inline
#endif /* __cplusplus */
#if defined __GNUC__ && !defined _SOFT_FLOAT
#ifdef __USE_ISOC99
# if !__GNUC_PREREQ (2,97)
# define __unordered_cmp(x, y) \
(__extension__ \
({ __typeof__(x) __x = (x); __typeof__(y) __y = (y); \
unsigned __r; \
__asm__("fcmpu 7,%1,%2 ; mfcr %0" : "=r" (__r) : "f" (__x), "f"(__y) \
: "cr7"); \
__r; }))
# undef isgreater
# undef isgreaterequal
# undef isless
# undef islessequal
# undef islessgreater
# undef isunordered
# define isgreater(x, y) (__unordered_cmp (x, y) >> 2 & 1)
# define isgreaterequal(x, y) ((__unordered_cmp (x, y) & 6) != 0)
# define isless(x, y) (__unordered_cmp (x, y) >> 3 & 1)
# define islessequal(x, y) ((__unordered_cmp (x, y) & 0xA) != 0)
# define islessgreater(x, y) ((__unordered_cmp (x, y) & 0xC) != 0)
# define isunordered(x, y) (__unordered_cmp (x, y) & 1)
# endif /* __GNUC_PREREQ (2,97) */
/* The gcc, version 2.7 or below, has problems with all this inlining
code. So disable it for this version of the compiler. */
# if __GNUC_PREREQ (2, 8)
/* Test for negative number. Used in the signbit() macro. */
__MATH_INLINE int
__NTH (__signbitf (float __x))
{
__extension__ union { float __f; int __i; } __u = { __f: __x };
return __u.__i < 0;
}
__MATH_INLINE int
__NTH (__signbit (double __x))
{
__extension__ union { double __d; int __i[2]; } __u = { __d: __x };
return __u.__i[0] < 0;
}
# endif
#endif /* __USE_ISOC99 */
#if !defined __NO_MATH_INLINES && defined __OPTIMIZE__
#ifdef __USE_ISOC99
# ifndef __powerpc64__
__MATH_INLINE long int lrint (double __x) __THROW;
__MATH_INLINE long int
__NTH (lrint (double __x))
{
union {
double __d;
int __ll[2];
} __u;
__asm__ ("fctiw %0,%1" : "=f"(__u.__d) : "f"(__x));
return __u.__ll[1];
}
__MATH_INLINE long int lrintf (float __x) __THROW;
__MATH_INLINE long int
__NTH (lrintf (float __x))
{
union {
double __d;
int __ll[2];
} __u;
__asm__ ("fctiw %0,%1" : "=f"(__u.__d) : "f"(__x));
return __u.__ll[1];
}
# endif
__MATH_INLINE double fdim (double __x, double __y) __THROW;
__MATH_INLINE double
__NTH (fdim (double __x, double __y))
{
return __x <= __y ? 0 : __x - __y;
}
__MATH_INLINE float fdimf (float __x, float __y) __THROW;
__MATH_INLINE float
__NTH (fdimf (float __x, float __y))
{
return __x <= __y ? 0 : __x - __y;
}
#endif /* __USE_ISOC99 */
#endif /* !__NO_MATH_INLINES && __OPTIMIZE__ */
/* This code is used internally in the GNU libc. */
#if 0 /*def __LIBC_INTERNAL_MATH_INLINES*/
#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
extern double __slow_ieee754_sqrt (double);
__MATH_INLINE double
__NTH (__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);
__MATH_INLINE float
__NTH (__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 */
#endif /* __GNUC__ && !_SOFT_FLOAT */
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