libc/sysdeps/linux/sparc/bits/mathinline.h

   1 /* Inline math functions for SPARC.
   2    Copyright (C) 1999, 2000, 2001, 2002, 2004, 2006
   3    Free Software Foundation, Inc.
   4    This file is part of the GNU C Library.
   5    Contributed by Jakub Jelinek <jakub@redhat.com>.
   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 #ifdef __GNUC__
  26
  27 #if defined __USE_ISOC99 && !__GNUC_PREREQ (3, 0)
  28 # undef isgreater
  29 # undef isgreaterequal
  30 # undef isless
  31 # undef islessequal
  32 # undef islessgreater
  33 # undef isunordered
  34
  35 #  ifndef __NO_LONG_DOUBLE_MATH
  36
  37 #   define __unordered_cmp(x, y) \
  38   (__extension__                                                              \
  39    ({ unsigned __r;                                                           \
  40       if (sizeof (x) == 4 && sizeof (y) == 4)                                 \
  41         {                                                                     \
  42           float __x = (x); float __y = (y);                                   \
  43           __asm__ ("fcmps %1,%2; st %%fsr, %0" : "=m" (__r) : "f" (__x),      \
  44                    "f" (__y) : "cc");                                         \
  45         }                                                                     \
  46       else if (sizeof (x) <= 8 && sizeof (y) <= 8)                            \
  47         {                                                                     \
  48           double __x = (x); double __y = (y);                                 \
  49           __asm__ ("fcmpd\t%1,%2\n\tst\t%%fsr,%0" : "=m" (__r) : "f" (__x),   \
  50                    "f" (__y) : "cc");                                         \
  51         }                                                                     \
  52       else                                                                    \
  53         {                                                                     \
  54           long double __x = (x); long double __y = (y);                       \
  55           extern int _Q_cmp (const long double a, const long double b);       \
  56           __r = _Q_cmp (__x, __y) << 10;                                      \
  57         }                                                                     \
  58       __r; }))
  59
  60 #  else
  61
  62 #   define __unordered_cmp(x, y) \
  63   (__extension__                                                              \
  64    ({ unsigned __r;                                                           \
  65       if (sizeof (x) == 4 && sizeof (y) == 4)                                 \
  66         {                                                                     \
  67           float __x = (x); float __y = (y);                                   \
  68           __asm__ ("fcmps %1,%2; st %%fsr, %0" : "=m" (__r) : "f" (__x),      \
  69                    "f" (__y) : "cc");                                         \
  70         }                                                                     \
  71       else                                                                    \
  72         {                                                                     \
  73           double __x = (x); double __y = (y);                                 \
  74           __asm__ ("fcmpd\t%1,%2\n\tst\t%%fsr,%0" : "=m" (__r) : "f" (__x),   \
  75                    "f" (__y) : "cc");                                         \
  76         }                                                                     \
  77       __r; }))
  78
  79 #  endif
  80
  81 #  define isgreater(x, y) ((__unordered_cmp (x, y) & (3 << 10)) == (2 << 10))
  82 #  define isgreaterequal(x, y) ((__unordered_cmp (x, y) & (1 << 10)) == 0)
  83 #  define isless(x, y) ((__unordered_cmp (x, y) & (3 << 10)) == (1 << 10))
  84 #  define islessequal(x, y) ((__unordered_cmp (x, y) & (2 << 10)) == 0)
  85 #  define islessgreater(x, y) (((__unordered_cmp (x, y) + (1 << 10)) & (2 << 10)) != 0)
  86 #  define isunordered(x, y) ((__unordered_cmp (x, y) & (3 << 10)) == (3 << 10))
  87
  88 #endif /* __USE_ISOC99 */
  89
  90 #if (!defined __NO_MATH_INLINES || defined __LIBC_INTERNAL_MATH_INLINES) && defined __OPTIMIZE__
  91
  92 # ifdef __cplusplus
  93 #  define __MATH_INLINE __inline
  94 # else
  95 #  define __MATH_INLINE __extern_inline
  96 # endif  /* __cplusplus */
  97
  98 /* The gcc, version 2.7 or below, has problems with all this inlining
  99    code.  So disable it for this version of the compiler.  */
 100 # if __GNUC_PREREQ (2, 8)
 101
 102 #  ifdef __USE_ISOC99
 103
 104 /* Test for negative number.  Used in the signbit() macro.  */
 105 __MATH_INLINE int
 106 __NTH (__signbitf (float __x))
 107 {
 108   __extension__ union { float __f; int __i; } __u = { __f: __x };
 109   return __u.__i < 0;
 110 }
 111
 112 __MATH_INLINE int
 113 __NTH (__signbit (double __x))
 114 {
 115   __extension__ union { double __d; int __i[2]; } __u = { __d: __x };
 116   return __u.__i[0] < 0;
 117 }
 118
 119 #    ifndef __NO_LONG_DOUBLE_MATH
 120 __MATH_INLINE int
 121 __NTH (__signbitl (long double __x))
 122 {
 123   __extension__ union { long double __l; int __i[4]; } __u = { __l: __x };
 124   return __u.__i[0] < 0;
 125 }
 126 #    else
 127 __MATH_INLINE int
 128 __NTH (__signbitl (long double __x))
 129 {
 130   return __signbit ((double)__x);
 131 }
 132 #    endif
 133
 134 #  endif /* __USE_ISOC99 */
 135
 136 #  if !defined __NO_MATH_INLINES && !__GNUC_PREREQ (3, 2)
 137
 138 __MATH_INLINE double
 139 __NTH (sqrt (double __x))
 140 {
 141   register double __r;
 142   __asm__ ("fsqrtd %1,%0" : "=f" (__r) : "f" (__x));
 143   return __r;
 144 }
 145
 146 __MATH_INLINE float
 147 __NTH (sqrtf (float __x))
 148 {
 149   register float __r;
 150   __asm__ ("fsqrts %1,%0" : "=f" (__r) : "f" (__x));
 151   return __r;
 152 }
 153
 154 #  endif /* !__NO_MATH_INLINES && !GCC 3.2+ */
 155
 156 /* This code is used internally in the GNU libc.  */
 157 #  ifdef __LIBC_INTERNAL_MATH_INLINES
 158 __MATH_INLINE double
 159 __ieee754_sqrt (double __x)
 160 {
 161   register double __r;
 162   __asm__ ("fsqrtd %1,%0" : "=f" (__r) : "f" (__x));
 163   return __r;
 164 }
 165
 166 __MATH_INLINE float
 167 __ieee754_sqrtf (float __x)
 168 {
 169   register float __r;
 170   __asm__ ("fsqrts %1,%0" : "=f" (__r) : "f" (__x));
 171   return __r;
 172 }
 173
 174 #  endif /* __LIBC_INTERNAL_MATH_INLINES */
 175 # endif /* gcc 2.8+ */
 176
 177 # ifdef __USE_ISOC99
 178
 179 #  ifndef __NO_MATH_INLINES
 180
 181 __MATH_INLINE double __NTH (fdim (double __x, double __y));
 182 __MATH_INLINE double
 183 __NTH (fdim (double __x, double __y))
 184 {
 185   return __x <= __y ? 0 : __x - __y;
 186 }
 187
 188 __MATH_INLINE float __NTH (fdimf (float __x, float __y));
 189 __MATH_INLINE float
 190 __NTH (fdimf (float __x, float __y))
 191 {
 192   return __x <= __y ? 0 : __x - __y;
 193 }
 194
 195 #  endif /* !__NO_MATH_INLINES */
 196 # endif /* __USE_ISOC99 */
 197 #endif /* !__NO_MATH_INLINES && __OPTIMIZE__ */
 198 #endif /* __GNUC__ */