mirror of
https://sourceware.org/git/glibc.git
synced 2025-01-13 20:50:08 +00:00
1e6d07234f
Simplify the C99 isgreater macros. Although some support was added in GCC 2.97, not all targets added support until GCC 3.1. Therefore only use the builtins in math.h from GCC 3.1 onwards, and defer to generic macros otherwise. Improve the generic isunordered macro to use compares rather than call fpclassify twice - this is not only faster but also correct for signaling NaNs. * math/math.h: Improve handling of C99 isgreater macros. * sysdeps/alpha/fpu/bits/mathinline.h: Remove isgreater macros. * sysdeps/m68k/m680x0/fpu/bits/mathinline.h: Likewise. * sysdeps/powerpc/bits/mathinline.h: Likewise. * sysdeps/sparc/fpu/bits/mathinline.h: Likewise. * sysdeps/x86/fpu/bits/mathinline.h: Likewise.
108 lines
2.8 KiB
C
108 lines
2.8 KiB
C
/* Inline math functions for powerpc.
|
|
Copyright (C) 1995-2017 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/>. */
|
|
|
|
#ifndef _MATH_H
|
|
# error "Never use <bits/mathinline.h> directly; include <math.h> instead."
|
|
#endif
|
|
|
|
#ifndef __extern_inline
|
|
# define __MATH_INLINE __inline
|
|
#else
|
|
# define __MATH_INLINE __extern_inline
|
|
#endif /* __cplusplus */
|
|
|
|
#if defined __GNUC__ && !defined _SOFT_FLOAT && !defined __NO_FPRS__
|
|
|
|
#ifdef __USE_ISOC99
|
|
/* 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))
|
|
{
|
|
#if __GNUC_PREREQ (4, 0)
|
|
return __builtin_signbitf (__x);
|
|
#else
|
|
__extension__ union { float __f; int __i; } __u = { __f: __x };
|
|
return __u.__i < 0;
|
|
#endif
|
|
}
|
|
__MATH_INLINE int
|
|
__NTH (__signbit (double __x))
|
|
{
|
|
#if __GNUC_PREREQ (4, 0)
|
|
return __builtin_signbit (__x);
|
|
#else
|
|
__extension__ union { double __d; long long __i; } __u = { __d: __x };
|
|
return __u.__i < 0;
|
|
#endif
|
|
}
|
|
# ifdef __LONG_DOUBLE_128__
|
|
__MATH_INLINE int
|
|
__NTH (__signbitl (long double __x))
|
|
{
|
|
return __signbit ((double) __x);
|
|
}
|
|
# endif
|
|
# 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;
|
|
long long __ll;
|
|
} __u;
|
|
__asm__ ("fctiw %0,%1" : "=f"(__u.__d) : "f"(__x));
|
|
return __u.__ll;
|
|
}
|
|
|
|
__MATH_INLINE long int lrintf (float __x) __THROW;
|
|
__MATH_INLINE long int
|
|
__NTH (lrintf (float __x))
|
|
{
|
|
return lrint ((double) __x);
|
|
}
|
|
# 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__ */
|
|
#endif /* __GNUC__ && !_SOFT_FLOAT && !__NO_FPRS__ */
|