sysdeps/powerpc/fpu/bits/mathinline.h

   1 /* Inline math functions for powerpc.
   2    Copyright (C) 1995, 1996, 1997, 1998, 1999, 2000, 2004, 2006, 2007, 2008
   3    Free Software Foundation, Inc.
   4    This file is part of the GNU C Library.
   5
   6    The GNU C Library is free software; you can redistribute it and/or
   7    modify it under the terms of the GNU Lesser General Public
   8    License as published by the Free Software Foundation; either
   9    version 2.1 of the License, or (at your option) any later version.
  10
  11    The GNU C Library is distributed in the hope that it will be useful,
  12    but WITHOUT ANY WARRANTY; without even the implied warranty of
  13    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14    Lesser General Public License for more details.
  15
  16    You should have received a copy of the GNU Lesser General Public
  17    License along with the GNU C Library; if not, write to the Free
  18    Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
  19    02111-1307 USA.  */
  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  /* __cplusplus */
  30
  31 #if defined __GNUC__ && !defined _SOFT_FLOAT
  32
  33 #ifdef __USE_ISOC99
  34 # if !__GNUC_PREREQ (2,97)
  35 #  define __unordered_cmp(x, y) \
  36   (__extension__                                                              \
  37    ({ __typeof__(x) __x = (x); __typeof__(y) __y = (y);                       \
  38       unsigned __r;                                                           \
  39       __asm__("fcmpu 7,%1,%2 ; mfcr %0" : "=r" (__r) : "f" (__x), "f"(__y)    \
  40               : "cr7");  \
  41       __r; }))
  42
  43 #  undef isgreater
  44 #  undef isgreaterequal
  45 #  undef isless
  46 #  undef islessequal
  47 #  undef islessgreater
  48 #  undef isunordered
  49
  50 #  define isgreater(x, y) (__unordered_cmp (x, y) >> 2 & 1)
  51 #  define isgreaterequal(x, y) ((__unordered_cmp (x, y) & 6) != 0)
  52 #  define isless(x, y) (__unordered_cmp (x, y) >> 3 & 1)
  53 #  define islessequal(x, y) ((__unordered_cmp (x, y) & 0xA) != 0)
  54 #  define islessgreater(x, y) ((__unordered_cmp (x, y) & 0xC) != 0)
  55 #  define isunordered(x, y) (__unordered_cmp (x, y) & 1)
  56
  57 # endif /* __GNUC_PREREQ (2,97) */
  58
  59 /* The gcc, version 2.7 or below, has problems with all this inlining
  60    code.  So disable it for this version of the compiler.  */
  61 # if __GNUC_PREREQ (2, 8)
  62 /* Test for negative number.  Used in the signbit() macro.  */
  63 __MATH_INLINE int
  64 __NTH (__signbitf (float __x))
  65 {
  66   __extension__ union { float __f; int __i; } __u = { __f: __x };
  67   return __u.__i < 0;
  68 }
  69 __MATH_INLINE int
  70 __NTH (__signbit (double __x))
  71 {
  72   __extension__ union { double __d; int __i[2]; } __u = { __d: __x };
  73   return __u.__i[0] < 0;
  74 }
  75 #  ifdef __LONG_DOUBLE_128__
  76 __MATH_INLINE int
  77 __NTH (__signbitl (long double __x))
  78 {
  79   __extension__ union { long double __d; int __i[4]; } __u = { __d: __x };
  80   return __u.__i[0] < 0;
  81 }
  82 #  endif
  83 # endif
  84 #endif /* __USE_ISOC99 */
  85
  86 #if !defined __NO_MATH_INLINES && defined __OPTIMIZE__
  87
  88 #ifdef __USE_ISOC99
  89
  90 # ifndef __powerpc64__
  91 __MATH_INLINE long int lrint (double __x) __THROW;
  92 __MATH_INLINE long int
  93 __NTH (lrint (double __x))
  94 {
  95   union {
  96     double __d;
  97     int __ll[2];
  98   } __u;
  99   __asm__ ("fctiw %0,%1" : "=f"(__u.__d) : "f"(__x));
 100   return __u.__ll[1];
 101 }
 102
 103 __MATH_INLINE long int lrintf (float __x) __THROW;
 104 __MATH_INLINE long int
 105 __NTH (lrintf (float __x))
 106 {
 107   union {
 108     double __d;
 109     int __ll[2];
 110   } __u;
 111   __asm__ ("fctiw %0,%1" : "=f"(__u.__d) : "f"(__x));
 112   return __u.__ll[1];
 113 }
 114 # endif
 115
 116 __MATH_INLINE double fdim (double __x, double __y) __THROW;
 117 __MATH_INLINE double
 118 __NTH (fdim (double __x, double __y))
 119 {
 120   return __x <= __y ? 0 : __x - __y;
 121 }
 122
 123 __MATH_INLINE float fdimf (float __x, float __y) __THROW;
 124 __MATH_INLINE float
 125 __NTH (fdimf (float __x, float __y))
 126 {
 127   return __x <= __y ? 0 : __x - __y;
 128 }
 129
 130 #endif /* __USE_ISOC99 */
 131 #endif /* !__NO_MATH_INLINES && __OPTIMIZE__ */
 132 #endif /* __GNUC__ && !_SOFT_FLOAT */