sysdeps/alpha/fpu/bits/mathinline.h

   1 /* Inline math functions for Alpha.
   2    Copyright (C) 1996, 1997, 1999-2001, 2004, 2007
   3    Free Software Foundation, Inc.
   4    This file is part of the GNU C Library.
   5    Contributed by David Mosberger-Tang.
   6
   7    The GNU C Library is free software; you can redistribute it and/or
   8    modify it under the terms of the GNU Lesser General Public
   9    License as published by the Free Software Foundation; either
  10    version 2.1 of the License, or (at your option) any later version.
  11
  12    The GNU C Library is distributed in the hope that it will be useful,
  13    but WITHOUT ANY WARRANTY; without even the implied warranty of
  14    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  15    Lesser General Public License for more details.
  16
  17    You should have received a copy of the GNU Lesser General Public
  18    License along with the GNU C Library; if not, write to the Free
  19    Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
  20    02111-1307 USA.  */
  21
  22 #ifndef _MATH_H
  23 # error "Never use <bits/mathinline.h> directly; include <math.h> instead."
  24 #endif
  25
  26 #ifndef __extern_inline
  27 # define __MATH_INLINE __inline
  28 #else
  29 # define __MATH_INLINE __extern_inline
  30 #endif
  31
  32 #if defined __USE_ISOC99 && defined __GNUC__ && !__GNUC_PREREQ(3,0)
  33 # undef isgreater
  34 # undef isgreaterequal
  35 # undef isless
  36 # undef islessequal
  37 # undef islessgreater
  38 # undef isunordered
  39 # define isunordered(u, v)                              \
  40   (__extension__                                        \
  41    ({ double __r, __u = (u), __v = (v);                 \
  42       __asm ("cmptun/su %1,%2,%0\n\ttrapb"              \
  43              : "=&f" (__r) : "f" (__u), "f"(__v));      \
  44       __r != 0; }))
  45 #endif /* ISO C99 */
  46
  47 #if (!defined __NO_MATH_INLINES || defined __LIBC_INTERNAL_MATH_INLINES) \
  48     && defined __OPTIMIZE__
  49
  50 #if !__GNUC_PREREQ (4, 0)
  51 # define __inline_copysign(NAME, TYPE)                                  \
  52 __MATH_INLINE TYPE                                                      \
  53 __NTH (NAME (TYPE __x, TYPE __y))                                       \
  54 {                                                                       \
  55   TYPE __z;                                                             \
  56   __asm ("cpys %1, %2, %0" : "=f" (__z) : "f" (__y), "f" (__x));        \
  57   return __z;                                                           \
  58 }
  59
  60 __inline_copysign (__copysignf, float)
  61 __inline_copysign (copysignf, float)
  62 __inline_copysign (__copysign, double)
  63 __inline_copysign (copysign, double)
  64
  65 # undef __inline_copysign
  66 #endif
  67
  68
  69 #if !__GNUC_PREREQ (2, 8)
  70 # define __inline_fabs(NAME, TYPE)                      \
  71 __MATH_INLINE TYPE                                      \
  72 __NTH (NAME (TYPE __x))                                 \
  73 {                                                       \
  74   TYPE __z;                                             \
  75   __asm ("cpys $f31, %1, %0" : "=f" (__z) : "f" (__x)); \
  76   return __z;                                           \
  77 }
  78
  79 __inline_fabs (__fabsf, float)
  80 __inline_fabs (fabsf, float)
  81 __inline_fabs (__fabs, double)
  82 __inline_fabs (fabs, double)
  83
  84 # undef __inline_fabs
  85 #endif
  86
  87 #ifdef __USE_ISOC99
  88
  89 /* Test for negative number.  Used in the signbit() macro.  */
  90 __MATH_INLINE int
  91 __NTH (__signbitf (float __x))
  92 {
  93 #if !__GNUC_PREREQ (4, 0)
  94   __extension__ union { float __f; int __i; } __u = { __f: __x };
  95   return __u.__i < 0;
  96 #else
  97   return __builtin_signbitf (__x);
  98 #endif
  99 }
 100
 101 __MATH_INLINE int
 102 __NTH (__signbit (double __x))
 103 {
 104 #if !__GNUC_PREREQ (4, 0)
 105   __extension__ union { double __d; long __i; } __u = { __d: __x };
 106   return __u.__i < 0;
 107 #else
 108   return __builtin_signbit (__x);
 109 #endif
 110 }
 111
 112 __MATH_INLINE int
 113 __NTH (__signbitl (long double __x))
 114 {
 115 #if !__GNUC_PREREQ (4, 0)
 116   __extension__ union {
 117     long double __d;
 118     long __i[sizeof(long double)/sizeof(long)];
 119   } __u = { __d: __x };
 120   return __u.__i[sizeof(long double)/sizeof(long) - 1] < 0;
 121 #else
 122   return __builtin_signbitl (__x);
 123 #endif
 124 }
 125
 126 /* Test for NaN.  Used in the isnan() macro.  */
 127
 128 __MATH_INLINE int
 129 __NTH (__isnanf (float __x))
 130 {
 131   return isunordered (__x, __x);
 132 }
 133
 134 __MATH_INLINE int
 135 __NTH (__isnan (double __x))
 136 {
 137   return isunordered (__x, __x);
 138 }
 139
 140 #ifndef __NO_LONG_DOUBLE_MATH
 141 __MATH_INLINE int
 142 __NTH (__isnanl (long double __x))
 143 {
 144   return isunordered (__x, __x);
 145 }
 146 #endif
 147
 148 #endif /* C99 */
 149
 150 #endif /* __NO_MATH_INLINES */