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, see
  19    <http://www.gnu.org/licenses/>.  */
  20
  21 #ifndef _MATH_H
  22 # error "Never use <bits/mathinline.h> directly; include <math.h> instead."
  23 #endif
  24
  25 #ifndef __extern_inline
  26 # define __MATH_INLINE __inline
  27 #else
  28 # define __MATH_INLINE __extern_inline
  29 #endif
  30
  31 #if defined __USE_ISOC99 && defined __GNUC__ && !__GNUC_PREREQ(3,0)
  32 # undef isgreater
  33 # undef isgreaterequal
  34 # undef isless
  35 # undef islessequal
  36 # undef islessgreater
  37 # undef isunordered
  38 # define isunordered(u, v)                              \
  39   (__extension__                                        \
  40    ({ double __r, __u = (u), __v = (v);                 \
  41       __asm ("cmptun/su %1,%2,%0\n\ttrapb"              \
  42              : "=&f" (__r) : "f" (__u), "f"(__v));      \
  43       __r != 0; }))
  44 #endif /* ISO C99 */
  45
  46 #if (!defined __NO_MATH_INLINES || defined __LIBC_INTERNAL_MATH_INLINES) \
  47     && defined __OPTIMIZE__
  48
  49 #if !__GNUC_PREREQ (4, 0)
  50 # define __inline_copysign(NAME, TYPE)                                  \
  51 __MATH_INLINE TYPE                                                      \
  52 __NTH (NAME (TYPE __x, TYPE __y))                                       \
  53 {                                                                       \
  54   TYPE __z;                                                             \
  55   __asm ("cpys %1, %2, %0" : "=f" (__z) : "f" (__y), "f" (__x));        \
  56   return __z;                                                           \
  57 }
  58
  59 __inline_copysign (__copysignf, float)
  60 __inline_copysign (copysignf, float)
  61 __inline_copysign (__copysign, double)
  62 __inline_copysign (copysign, double)
  63
  64 # undef __inline_copysign
  65 #endif
  66
  67
  68 #if !__GNUC_PREREQ (2, 8)
  69 # define __inline_fabs(NAME, TYPE)                      \
  70 __MATH_INLINE TYPE                                      \
  71 __NTH (NAME (TYPE __x))                                 \
  72 {                                                       \
  73   TYPE __z;                                             \
  74   __asm ("cpys $f31, %1, %0" : "=f" (__z) : "f" (__x)); \
  75   return __z;                                           \
  76 }
  77
  78 __inline_fabs (__fabsf, float)
  79 __inline_fabs (fabsf, float)
  80 __inline_fabs (__fabs, double)
  81 __inline_fabs (fabs, double)
  82
  83 # undef __inline_fabs
  84 #endif
  85
  86 #ifdef __USE_ISOC99
  87
  88 /* Test for negative number.  Used in the signbit() macro.  */
  89 __MATH_INLINE int
  90 __NTH (__signbitf (float __x))
  91 {
  92 #if !__GNUC_PREREQ (4, 0)
  93   __extension__ union { float __f; int __i; } __u = { __f: __x };
  94   return __u.__i < 0;
  95 #else
  96   return __builtin_signbitf (__x);
  97 #endif
  98 }
  99
 100 __MATH_INLINE int
 101 __NTH (__signbit (double __x))
 102 {
 103 #if !__GNUC_PREREQ (4, 0)
 104   __extension__ union { double __d; long __i; } __u = { __d: __x };
 105   return __u.__i < 0;
 106 #else
 107   return __builtin_signbit (__x);
 108 #endif
 109 }
 110
 111 __MATH_INLINE int
 112 __NTH (__signbitl (long double __x))
 113 {
 114 #if !__GNUC_PREREQ (4, 0)
 115   __extension__ union {
 116     long double __d;
 117     long __i[sizeof(long double)/sizeof(long)];
 118   } __u = { __d: __x };
 119   return __u.__i[sizeof(long double)/sizeof(long) - 1] < 0;
 120 #else
 121   return __builtin_signbitl (__x);
 122 #endif
 123 }
 124
 125 /* Test for NaN.  Used in the isnan() macro.  */
 126
 127 __MATH_INLINE int
 128 __NTH (__isnanf (float __x))
 129 {
 130   return isunordered (__x, __x);
 131 }
 132
 133 __MATH_INLINE int
 134 __NTH (__isnan (double __x))
 135 {
 136   return isunordered (__x, __x);
 137 }
 138
 139 #ifndef __NO_LONG_DOUBLE_MATH
 140 __MATH_INLINE int
 141 __NTH (__isnanl (long double __x))
 142 {
 143   return isunordered (__x, __x);
 144 }
 145 #endif
 146
 147 #endif /* C99 */
 148
 149 #endif /* __NO_MATH_INLINES */