compiler/clib/__math.h

   1 /*
   2  * ====================================================
   3  * Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved.
   4  *
   5  * Developed at SunPro, a Sun Microsystems, Inc. business.
   6  * Permission to use, copy, modify, and distribute this
   7  * software is freely granted, provided that this notice
   8  * is preserved.
   9  * ====================================================
  10  */
  11
  12 /*
  13  * from: @(#)fdlibm.h 5.1 93/09/24
  14  * from: $FreeBSD: src/lib/msun/src/math_private.h,v 1.6 1999/08/28 00:06:43 peter Exp $
  15  * $Id$
  16  */
  17
  18 #ifndef _MATH_PRIVATE_H_
  19 #define _MATH_PRIVATE_H_
  20
  21 #include <aros/system.h>
  22 #include <stdint.h>
  23
  24 /* The original fdlibm code used statements like:
  25         n0 = ((*(int*)&one)>>29)^1;             * index of high word *
  26         ix0 = *(n0+(int*)&x);                   * high word of x *
  27         ix1 = *((1-n0)+(int*)&x);               * low word of x *
  28    to dig two 32 bit words out of the 64 bit IEEE floating point
  29    value.  That is non-ANSI, and, moreover, the gcc instruction
  30    scheduler gets it wrong.  We instead use the following macros.
  31    Unlike the original code, we determine the endianness at compile
  32    time, not at run time; I don't see much benefit to selecting
  33    endianness at run time.  */
  34
  35 /* A union which permits us to convert between a double and two 32 bit
  36    ints.  */
  37
  38 #if AROS_BIG_ENDIAN == 1
  39
  40 typedef union
  41 {
  42   double value;
  43   struct
  44   {
  45     uint32_t msw;
  46     uint32_t lsw;
  47   } parts;
  48 } ieee_double_shape_type;
  49
  50 #endif
  51
  52 #if AROS_BIG_ENDIAN == 0
  53
  54 typedef union
  55 {
  56   double value;
  57   struct
  58   {
  59     uint32_t    lsw;
  60     uint32_t    msw;
  61   } parts;
  62 } ieee_double_shape_type;
  63
  64 #endif
  65
  66 /* Get two 32 bit ints from a double.  */
  67
  68 #define EXTRACT_WORDS(ix0,ix1,d)                                \
  69 do {                                                            \
  70   ieee_double_shape_type ew_u;                                  \
  71   ew_u.value = (d);                                             \
  72   (ix0) = ew_u.parts.msw;                                       \
  73   (ix1) = ew_u.parts.lsw;                                       \
  74 } while (0)
  75
  76 /* Get the more significant 32 bit int from a double.  */
  77
  78 #define GET_HIGH_WORD(i,d)                                      \
  79 do {                                                            \
  80   ieee_double_shape_type gh_u;                                  \
  81   gh_u.value = (d);                                             \
  82   (i) = gh_u.parts.msw;                                         \
  83 } while (0)
  84
  85 /* Get the less significant 32 bit int from a double.  */
  86
  87 #define GET_LOW_WORD(i,d)                                       \
  88 do {                                                            \
  89   ieee_double_shape_type gl_u;                                  \
  90   gl_u.value = (d);                                             \
  91   (i) = gl_u.parts.lsw;                                         \
  92 } while (0)
  93
  94 /* Set a double from two 32 bit ints.  */
  95
  96 #define INSERT_WORDS(d,ix0,ix1)                                 \
  97 do {                                                            \
  98   ieee_double_shape_type iw_u;                                  \
  99   iw_u.parts.msw = (ix0);                                       \
 100   iw_u.parts.lsw = (ix1);                                       \
 101   (d) = iw_u.value;                                             \
 102 } while (0)
 103
 104 /* Set the more significant 32 bits of a double from an int.  */
 105
 106 #define SET_HIGH_WORD(d,v)                                      \
 107 do {                                                            \
 108   ieee_double_shape_type sh_u;                                  \
 109   sh_u.value = (d);                                             \
 110   sh_u.parts.msw = (v);                                         \
 111   (d) = sh_u.value;                                             \
 112 } while (0)
 113
 114 /* Set the less significant 32 bits of a double from an int.  */
 115
 116 #define SET_LOW_WORD(d,v)                                       \
 117 do {                                                            \
 118   ieee_double_shape_type sl_u;                                  \
 119   sl_u.value = (d);                                             \
 120   sl_u.parts.lsw = (v);                                         \
 121   (d) = sl_u.value;                                             \
 122 } while (0)
 123
 124 /* A union which permits us to convert between a float and a 32 bit
 125    int.  */
 126
 127 typedef union
 128 {
 129   float value;
 130   uint32_t word;
 131 } ieee_float_shape_type;
 132
 133 /* Get a 32 bit int from a float.  */
 134
 135 #define GET_FLOAT_WORD(i,d)                                     \
 136 do {                                                            \
 137   ieee_float_shape_type gf_u;                                   \
 138   gf_u.value = (d);                                             \
 139   (i) = gf_u.word;                                              \
 140 } while (0)
 141
 142 /* Set a float from a 32 bit int.  */
 143
 144 #define SET_FLOAT_WORD(d,i)                                     \
 145 do {                                                            \
 146   ieee_float_shape_type sf_u;                                   \
 147   sf_u.word = (i);                                              \
 148   (d) = sf_u.value;                                             \
 149 } while (0)
 150
 151 /* ieee style elementary functions */
 152 extern double __ieee754_sqrt (double);
 153 extern double __ieee754_acos (double);
 154 extern double __ieee754_acosh (double);
 155 extern double __ieee754_log (double);
 156 extern double __ieee754_atanh (double);
 157 extern double __ieee754_asin (double);
 158 extern double __ieee754_atan2 (double,double);
 159 extern double __ieee754_exp (double);
 160 extern double __ieee754_cosh (double);
 161 extern double __ieee754_fmod (double,double);
 162 extern double __ieee754_pow (double,double);
 163 extern double __ieee754_lgamma_r (double,int *);
 164 extern double __ieee754_gamma_r (double,int *);
 165 extern double __ieee754_lgamma (double);
 166 extern double __ieee754_gamma (double);
 167 extern double __ieee754_log10 (double);
 168 extern double __ieee754_sinh (double);
 169 extern double __ieee754_hypot (double,double);
 170 extern double __ieee754_j0 (double);
 171 extern double __ieee754_j1 (double);
 172 extern double __ieee754_y0 (double);
 173 extern double __ieee754_y1 (double);
 174 extern double __ieee754_jn (int,double);
 175 extern double __ieee754_yn (int,double);
 176 extern double __ieee754_remainder (double,double);
 177 extern int32_t __ieee754_rem_pio2 (double,double*);
 178 extern double __ieee754_scalb (double,double);
 179
 180 /* fdlibm kernel function */
 181 extern double __kernel_standard (double,double,int);
 182 extern double __kernel_sin (double,double,int);
 183 extern double __kernel_cos (double,double);
 184 extern double __kernel_tan (double,double,int);
 185 extern int    __kernel_rem_pio2 (double*,double*,int,int,int,const int32_t*);
 186
 187
 188 /* ieee style elementary float functions */
 189 extern float __ieee754_sqrtf (float);
 190 extern float __ieee754_acosf (float);
 191 extern float __ieee754_acoshf (float);
 192 extern float __ieee754_logf (float);
 193 extern float __ieee754_atanhf (float);
 194 extern float __ieee754_asinf (float);
 195 extern float __ieee754_atan2f (float,float);
 196 extern float __ieee754_expf (float);
 197 extern float __ieee754_coshf (float);
 198 extern float __ieee754_fmodf (float,float);
 199 extern float __ieee754_powf (float,float);
 200 extern float __ieee754_lgammaf_r (float,int *);
 201 extern float __ieee754_gammaf_r (float,int *);
 202 extern float __ieee754_lgammaf (float);
 203 extern float __ieee754_gammaf (float);
 204 extern float __ieee754_log10f (float);
 205 extern float __ieee754_sinhf (float);
 206 extern float __ieee754_hypotf (float,float);
 207 extern float __ieee754_j0f (float);
 208 extern float __ieee754_j1f (float);
 209 extern float __ieee754_y0f (float);
 210 extern float __ieee754_y1f (float);
 211 extern float __ieee754_jnf (int,float);
 212 extern float __ieee754_ynf (int,float);
 213 extern float __ieee754_remainderf (float,float);
 214 extern int32_t __ieee754_rem_pio2f (float,float*);
 215 extern float __ieee754_scalbf (float,float);
 216
 217 /* float versions of fdlibm kernel functions */
 218 extern float __kernel_sinf (float,float,int);
 219 extern float __kernel_cosf (float,float);
 220 extern float __kernel_tanf (float,float,int);
 221 extern int   __kernel_rem_pio2f (float*,float*,int,int,int,const int32_t*);
 222
 223 /*
 224     This is how to specify which are implemented in assembler,
 225     unfortunately we do not do this quite yet.
 226 #ifdef  __alpha__
 227 */
 228 #define __generic___ieee754_acos        __ieee754_acos
 229 #define __generic___ieee754_asin        __ieee754_asin
 230 #define __generic___ieee754_atan2       __ieee754_atan2
 231 #define __generic___ieee754_exp         __ieee754_exp
 232 #define __generic___ieee754_fmod        __ieee754_fmod
 233 #define __generic___ieee754_log         __ieee754_log
 234 #define __generic___ieee754_log10       __ieee754_log10
 235 #define __generic___ieee754_remainder   __ieee754_remainder
 236 #define __generic___ieee754_scalb       __ieee754_scalb
 237 #define __generic___ieee754_sqrt        __ieee754_sqrt
 238 #define __generic_atan                  atan
 239 #define __generic_ceil                  ceil
 240 #define __generic_copysign              copysign
 241 #define __generic_cos                   cos
 242 #define __generic_finite                finite
 243 #define __generic_floor                 floor
 244 #define __generic_ilogb                 ilogb
 245 #define __generic_log1p                 log1p
 246 #define __generic_logb                  logb
 247 #define __generic_rint                  rint
 248 #define __generic_scalbn                scalbn
 249 #define __generic_significand           significand
 250 #define __generic_sin                   sin
 251 #define __generic_tan                   tan
 252 /*
 253 #endif
 254 */
 255
 256 #endif /* _MATH_PRIVATE_H_ */