apps/include/math.h

   1 /*
   2     meinOS - A unix-like x86 microkernel operating system
   3     Copyright (C) 2008  Janosch Gräf <janosch.graef@gmx.net>
   4
   5     This program is free software: you can redistribute it and/or modify
   6     it under the terms of the GNU Lesser General Public License as published by
   7     the Free Software Foundation, either version 3 of the License, or
   8     (at your option) any later version.
   9
  10     This program is distributed in the hope that it will be useful,
  11     but WITHOUT ANY WARRANTY; without even the implied warranty of
  12     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13     GNU Lesser General Public License for more details.
  14
  15     You should have received a copy of the GNU Lesser General Public License
  16     along with this program.  If not, see <http://www.gnu.org/licenses/>.
  17 */
  18
  19 #ifndef _MATH_H_
  20 #define _MATH_H_
  21
  22 # define M_E            2.7182818284590452354   /* e */
  23 # define M_LOG2E        1.4426950408889634074   /* log_2 e */
  24 # define M_LOG10E       0.43429448190325182765  /* log_10 e */
  25 # define M_LN2          0.69314718055994530942  /* log_e 2 */
  26 # define M_LN10         2.30258509299404568402  /* log_e 10 */
  27 # define M_PI           3.14159265358979323846  /* pi */
  28 # define M_PI_2         1.57079632679489661923  /* pi/2 */
  29 # define M_PI_4         0.78539816339744830962  /* pi/4 */
  30 # define M_1_PI         0.31830988618379067154  /* 1/pi */
  31 # define M_2_PI         0.63661977236758134308  /* 2/pi */
  32 # define M_2_SQRTPI     1.12837916709551257390  /* 2/sqrt(pi) */
  33 # define M_SQRT2        1.41421356237309504880  /* sqrt(2) */
  34 # define M_SQRT1_2      0.70710678118654752440  /* 1/sqrt(2) */
  35
  36 #define FLT_EVAL_METHOD 0
  37
  38 #define MAXFLOAT  ((float)3.40282346638528860e+38)
  39 #define HUGE      MAXFLOAT
  40 #define HUGE_VAL  (__builtin_huge_val())
  41 #define HUGE_VALF (__builtin_huge_valf())
  42 #define HUGE_VALL (__builtin_huge_vall())
  43 #define NAN       (__builtin_nanf(""))
  44
  45 # define FP_NAN       1
  46 # define FP_INFINITE  2
  47 # define FP_ZERO      3
  48 # define FP_SUBNORMAL 4
  49 # define FP_NORMAL    5
  50
  51 #define X_TLOSS 1.41484755040568800000e+16
  52
  53 // Types of exceptions in the `type' field.
  54 #define DOMAIN    1
  55 #define SING      2
  56 #define OVERFLOW  3
  57 #define UNDERFLOW 4
  58 #define TLOSS     5
  59 #define PLOSS     6
  60
  61 #define fpclassify(x) (sizeof(x)==sizeof(float)?__fpclassifyf(x):(sizeof(x)==sizeof(double)?__fpclassify(x):__fpclassifyl(x)))
  62 #define isfinite(x)   (sizeof(x)==sizeof(float)?__isfinitef(x):(sizeof(x)==sizeof(double)?__isfinite(x):__isfinitel(x)))
  63 #define isinf(x)      (sizeof(x)==sizeof(float)?__isinff(x):(sizeof(x)==sizeof(double)?__isinf(x):__isinfl(x)))
  64 #define isnan(x)      (sizeof(x)==sizeof(float)?__isnanf(x):(sizeof(x)==sizeof(double)?__isnan(x):__isnanl(x)))
  65 #define isnormal(x)   (sizeof(x)==sizeof(float)?__isnormalf(x):(sizeof(x)==sizeof(double)?__isnormal(x):__isnormall(x)))
  66 #define signbit(x)    (sizeof(x)==sizeof(float)?__signbitf(x):(sizeof(x)==sizeof(double)?__signbit(x):__signbitl(x)))
  67
  68 #define isgreater(x, y)         __builtin_isgreater(x, y)
  69 #define isgreaterequal(x, y)    __builtin_isgreaterequal(x, y)
  70 #define isless(x, y)            __builtin_isless(x, y)
  71 #define islessequal(x, y)       __builtin_islessequal(x, y)
  72 #define islessgreater(x, y)     __builtin_islessgreater(x, y)
  73 #define isunordered(u, v)       __builtin_isunordered(u, v)
  74
  75 typedef double double_t;
  76 typedef float float_t;
  77
  78 # ifdef __cplusplus
  79 struct __exception
  80 # else
  81 struct exception
  82 # endif
  83 {
  84   int type;
  85   char *name;
  86   double arg1;
  87   double arg2;
  88   double retval;
  89 };
  90
  91 # ifdef __cplusplus
  92 extern int matherr(struct __exception *__exc) throw ();
  93 # else
  94 extern int matherr(struct exception *__exc);
  95 # endif
  96
  97 int __isfinite(double x);
  98 int __isnan(double x);
  99 int __isinf(double x);
 100
 101 int __isfinitef(float x);
 102 int __isnanf(float x);
 103 int __isinff(float x);
 104
 105 #endif /* _MATH_H_ */