sysdeps/m68k/fpu/bits/mathinline.h

   1 /* Definitions of inline math functions implemented by the m68881/2.
   2    Copyright (C) 1991,92,93,94,96,97,98,99,2000,2002, 2003, 2004
   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 #ifdef  __GNUC__
  22
  23 #ifdef __USE_ISOC99
  24 /* GCC 3.1 and up have builtins that actually can be used.  */
  25 # if !__GNUC_PREREQ (3,1)
  26 /* ISO C99 defines some macros to perform unordered comparisons.  The
  27    m68k FPU supports this with special opcodes and we should use them.
  28    These must not be inline functions since we have to be able to handle
  29    all floating-point types.  */
  30 #  undef isgreater
  31 #  undef isgreaterequal
  32 #  undef isless
  33 #  undef islessequal
  34 #  undef islessgreater
  35 #  undef isunordered
  36 #  define isgreater(x, y)                                       \
  37    __extension__                                        \
  38    ({ char __result;                                    \
  39       __asm__ ("fcmp%.x %2,%1; fsogt %0"                \
  40                : "=dm" (__result) : "f" (x), "f" (y));  \
  41       __result != 0; })
  42
  43 #  define isgreaterequal(x, y)                          \
  44    __extension__                                        \
  45    ({ char __result;                                    \
  46       __asm__ ("fcmp%.x %2,%1; fsoge %0"                \
  47                : "=dm" (__result) : "f" (x), "f" (y));  \
  48       __result != 0; })
  49
  50 #  define isless(x, y)                                  \
  51    __extension__                                        \
  52    ({ char __result;                                    \
  53       __asm__ ("fcmp%.x %2,%1; fsolt %0"                \
  54                : "=dm" (__result) : "f" (x), "f" (y));  \
  55       __result != 0; })
  56
  57 #  define islessequal(x, y)                             \
  58    __extension__                                        \
  59    ({ char __result;                                    \
  60       __asm__ ("fcmp%.x %2,%1; fsole %0"                \
  61                : "=dm" (__result) : "f" (x), "f" (y));  \
  62       __result != 0; })
  63
  64 #  define islessgreater(x, y)                           \
  65    __extension__                                        \
  66    ({ char __result;                                    \
  67       __asm__ ("fcmp%.x %2,%1; fsogl %0"                \
  68                : "=dm" (__result) : "f" (x), "f" (y));  \
  69       __result != 0; })
  70
  71 #  define isunordered(x, y)                             \
  72    __extension__                                        \
  73    ({ char __result;                                    \
  74       __asm__ ("fcmp%.x %2,%1; fsun %0"                 \
  75                : "=dm" (__result) : "f" (x), "f" (y));  \
  76       __result != 0; })
  77 # endif /* GCC 3.1 */
  78 #endif
  79
  80
  81 #if (!defined __NO_MATH_INLINES && defined __OPTIMIZE__) \
  82     || defined __LIBC_INTERNAL_MATH_INLINES
  83
  84 #ifdef  __LIBC_INTERNAL_MATH_INLINES
  85 /* This is used when defining the functions themselves.  Define them with
  86    __ names, and with `static inline' instead of `extern inline' so the
  87    bodies will always be used, never an external function call.  */
  88 # define __m81_u(x)             __CONCAT(__,x)
  89 # define __m81_inline           static __inline
  90 #else
  91 # define __m81_u(x)             x
  92 # ifdef __cplusplus
  93 #  define __m81_inline          __inline
  94 # else
  95 #  define __m81_inline          extern __inline
  96 # endif
  97 # define __M81_MATH_INLINES     1
  98 #endif
  99
 100 /* Define a const math function.  */
 101 #define __m81_defun(rettype, func, args)                                      \
 102   __m81_inline rettype __attribute__((__const__))                             \
 103   __m81_u(func) args
 104
 105 /* Define the three variants of a math function that has a direct
 106    implementation in the m68k fpu.  FUNC is the name for C (which will be
 107    suffixed with f and l for the float and long double version, resp).  OP
 108    is the name of the fpu operation (without leading f).  */
 109
 110 #if defined __USE_MISC || defined __USE_ISOC99
 111 # define __inline_mathop(func, op)                      \
 112   __inline_mathop1(double, func, op)                    \
 113   __inline_mathop1(float, __CONCAT(func,f), op) \
 114   __inline_mathop1(long double, __CONCAT(func,l), op)
 115 #else
 116 # define __inline_mathop(func, op)                      \
 117   __inline_mathop1(double, func, op)
 118 #endif
 119
 120 #define __inline_mathop1(float_type,func, op)                                 \
 121   __m81_defun (float_type, func, (float_type __mathop_x))                     \
 122   {                                                                           \
 123     float_type __result;                                                      \
 124     __asm("f" __STRING(op) "%.x %1, %0" : "=f" (__result) : "f" (__mathop_x));\
 125     return __result;                                                          \
 126   }
 127
 128 __inline_mathop(__atan, atan)
 129 __inline_mathop(__cos, cos)
 130 __inline_mathop(__sin, sin)
 131 __inline_mathop(__tan, tan)
 132 __inline_mathop(__tanh, tanh)
 133 __inline_mathop(__fabs, abs)
 134
 135 #if defined __USE_MISC || defined __USE_XOPEN_EXTENDED || defined __USE_ISOC99
 136 __inline_mathop(__rint, int)
 137 __inline_mathop(__expm1, etoxm1)
 138 __inline_mathop(__log1p, lognp1)
 139 #endif
 140
 141 #ifdef __USE_MISC
 142 __inline_mathop(__significand, getman)
 143 #endif
 144
 145 #ifdef __USE_ISOC99
 146 __inline_mathop(__trunc, intrz)
 147 #endif
 148
 149 #if !defined __NO_MATH_INLINES && defined __OPTIMIZE__
 150
 151 __inline_mathop(atan, atan)
 152 __inline_mathop(cos, cos)
 153 __inline_mathop(sin, sin)
 154 __inline_mathop(tan, tan)
 155 __inline_mathop(tanh, tanh)
 156
 157 # if defined __USE_MISC || defined __USE_XOPEN_EXTENDED || defined __USE_ISOC99
 158 __inline_mathop(rint, int)
 159 __inline_mathop(expm1, etoxm1)
 160 __inline_mathop(log1p, lognp1)
 161 # endif
 162
 163 # ifdef __USE_MISC
 164 __inline_mathop(significand, getman)
 165 # endif
 166
 167 # ifdef __USE_ISOC99
 168 __inline_mathop(trunc, intrz)
 169 # endif
 170
 171 #endif /* !__NO_MATH_INLINES && __OPTIMIZE__ */
 172
 173 /* This macro contains the definition for the rest of the inline
 174    functions, using FLOAT_TYPE as the domain type and S as the suffix
 175    for the function names.  */
 176
 177 #define __inline_functions(float_type, s)                                 \
 178 __m81_defun (float_type, __CONCAT(__floor,s), (float_type __x))   \
 179 {                                                                         \
 180   float_type __result;                                                    \
 181   unsigned long int __ctrl_reg;                                           \
 182   __asm __volatile__ ("fmove%.l %!, %0" : "=dm" (__ctrl_reg));            \
 183   /* Set rounding towards negative infinity.  */                          \
 184   __asm __volatile__ ("fmove%.l %0, %!" : /* No outputs.  */              \
 185                       : "dmi" ((__ctrl_reg & ~0x10) | 0x20));             \
 186   /* Convert X to an integer, using -Inf rounding.  */                    \
 187   __asm __volatile__ ("fint%.x %1, %0" : "=f" (__result) : "f" (__x));    \
 188   /* Restore the previous rounding mode.  */                              \
 189   __asm __volatile__ ("fmove%.l %0, %!" : /* No outputs.  */              \
 190                       : "dmi" (__ctrl_reg));                              \
 191   return __result;                                                        \
 192 }                                                                         \
 193                                                                           \
 194 __m81_defun (float_type, __CONCAT(__ceil,s), (float_type __x))            \
 195 {                                                                         \
 196   float_type __result;                                                    \
 197   unsigned long int __ctrl_reg;                                           \
 198   __asm __volatile__ ("fmove%.l %!, %0" : "=dm" (__ctrl_reg));            \
 199   /* Set rounding towards positive infinity.  */                          \
 200   __asm __volatile__ ("fmove%.l %0, %!" : /* No outputs.  */              \
 201                       : "dmi" (__ctrl_reg | 0x30));                       \
 202   /* Convert X to an integer, using +Inf rounding.  */                    \
 203   __asm __volatile__ ("fint%.x %1, %0" : "=f" (__result) : "f" (__x));    \
 204   /* Restore the previous rounding mode.  */                              \
 205   __asm __volatile__ ("fmove%.l %0, %!" : /* No outputs.  */              \
 206                       : "dmi" (__ctrl_reg));                              \
 207   return __result;                                                        \
 208 }
 209
 210 __inline_functions(double,)
 211 #if defined __USE_MISC || defined __USE_ISOC99
 212 __inline_functions(float,f)
 213 __inline_functions(long double,l)
 214 #endif
 215 #undef __inline_functions
 216
 217 #ifdef __USE_MISC
 218
 219 # define __inline_functions(float_type, s)                                \
 220 __m81_defun (int, __CONCAT(__isinf,s), (float_type __value))              \
 221 {                                                                         \
 222   /* There is no branch-condition for infinity,                           \
 223      so we must extract and examine the condition codes manually.  */     \
 224   unsigned long int __fpsr;                                               \
 225   __asm("ftst%.x %1\n"                                                    \
 226         "fmove%.l %/fpsr, %0" : "=dm" (__fpsr) : "f" (__value));          \
 227   return (__fpsr & (2 << 24)) ? (__fpsr & (8 << 24) ? -1 : 1) : 0;        \
 228 }                                                                         \
 229                                                                           \
 230 __m81_defun (int, __CONCAT(__finite,s), (float_type __value))             \
 231 {                                                                         \
 232   /* There is no branch-condition for infinity, so we must extract and    \
 233      examine the condition codes manually.  */                            \
 234   unsigned long int __fpsr;                                               \
 235   __asm ("ftst%.x %1\n"                                                   \
 236          "fmove%.l %/fpsr, %0" : "=dm" (__fpsr) : "f" (__value));         \
 237   return (__fpsr & (3 << 24)) == 0;                                       \
 238 }                                                                         \
 239                                                                           \
 240 __m81_defun (float_type, __CONCAT(__scalbn,s),                            \
 241              (float_type __x, int __n))                                   \
 242 {                                                                         \
 243   float_type __result;                                                    \
 244   __asm ("fscale%.l %1, %0" : "=f" (__result) : "dmi" (__n), "0" (__x));  \
 245   return __result;                                                        \
 246 }
 247
 248 __inline_functions(double,)
 249 __inline_functions(float,f)
 250 __inline_functions(long double,l)
 251 # undef __inline_functions
 252
 253 #endif /* Use misc.  */
 254
 255 #if defined __USE_MISC || defined __USE_XOPEN
 256
 257 # define __inline_functions(float_type, s)                                \
 258 __m81_defun (int, __CONCAT(__isnan,s), (float_type __value))              \
 259 {                                                                         \
 260   char __result;                                                          \
 261   __asm("ftst%.x %1\n"                                                    \
 262         "fsun %0" : "=dm" (__result) : "f" (__value));                    \
 263   return __result;                                                        \
 264 }
 265
 266 __inline_functions(double,)
 267 # ifdef __USE_MISC
 268 __inline_functions(float,f)
 269 __inline_functions(long double,l)
 270 # endif
 271 # undef __inline_functions
 272
 273 #endif
 274
 275 #ifdef __USE_ISOC99
 276
 277 # define __inline_functions(float_type, s)                                \
 278 __m81_defun (int, __CONCAT(__signbit,s), (float_type __value))            \
 279 {                                                                         \
 280   /* There is no branch-condition for the sign bit, so we must extract    \
 281      and examine the condition codes manually.  */                        \
 282   unsigned long int __fpsr;                                               \
 283   __asm ("ftst%.x %1\n"                                                   \
 284          "fmove%.l %/fpsr, %0" : "=dm" (__fpsr) : "f" (__value));         \
 285   return (__fpsr >> 27) & 1;                                              \
 286 }                                                                         \
 287                                                                           \
 288   __m81_defun (float_type, __CONCAT(__scalbln,s),                         \
 289              (float_type __x, long int __n))                              \
 290 {                                                                         \
 291   return __CONCAT(__scalbn,s) (__x, __n);                                 \
 292 }                                                                         \
 293                                                                           \
 294 __m81_defun (float_type, __CONCAT(__nearbyint,s), (float_type __x))       \
 295 {                                                                         \
 296   float_type __result;                                                    \
 297   unsigned long int __ctrl_reg;                                           \
 298   __asm __volatile__ ("fmove%.l %!, %0" : "=dm" (__ctrl_reg));            \
 299   /* Temporarily disable the inexact exception.  */                       \
 300   __asm __volatile__ ("fmove%.l %0, %!" : /* No outputs.  */              \
 301                       : "dmi" (__ctrl_reg & ~0x200));                     \
 302   __asm __volatile__ ("fint%.x %1, %0" : "=f" (__result) : "f" (__x));    \
 303   __asm __volatile__ ("fmove%.l %0, %!" : /* No outputs.  */              \
 304                       : "dmi" (__ctrl_reg));                              \
 305   return __result;                                                        \
 306 }                                                                         \
 307                                                                           \
 308 __m81_defun (long int, __CONCAT(__lrint,s), (float_type __x))             \
 309 {                                                                         \
 310   long int __result;                                                      \
 311   __asm ("fmove%.l %1, %0" : "=dm" (__result) : "f" (__x));               \
 312   return __result;                                                        \
 313 }                                                                         \
 314                                                                           \
 315 __m81_inline float_type                                                   \
 316 __m81_u(__CONCAT(__fma,s))(float_type __x, float_type __y,                \
 317                            float_type __z)                                \
 318 {                                                                         \
 319   return (__x * __y) + __z;                                               \
 320 }
 321
 322 __inline_functions (double,)
 323 __inline_functions (float,f)
 324 __inline_functions (long double,l)
 325 # undef __inline_functions
 326
 327 #endif /* Use ISO C9x */
 328
 329 #ifdef __USE_GNU
 330
 331 # define __inline_functions(float_type, s)                              \
 332 __m81_inline void                                                       \
 333 __m81_u(__CONCAT(__sincos,s))(float_type __x, float_type *__sinx,       \
 334                               float_type *__cosx)                       \
 335 {                                                                       \
 336   __asm ("fsincos%.x %2,%1:%0"                                          \
 337          : "=f" (*__sinx), "=f" (*__cosx) : "f" (__x));                 \
 338 }
 339
 340 __inline_functions (double,)
 341 __inline_functions (float,f)
 342 __inline_functions (long double,l)
 343 # undef __inline_functions
 344
 345 #endif
 346
 347 #if !defined __NO_MATH_INLINES && defined __OPTIMIZE__
 348
 349 /* Define inline versions of the user visible functions.  */
 350
 351 /* Note that there must be no whitespace before the argument passed for
 352    NAME, to make token pasting work correctly with -traditional.  */
 353 # define __inline_forward_c(rettype, name, args1, args2)        \
 354 extern __inline rettype __attribute__((__const__))              \
 355   name args1                                                    \
 356 {                                                               \
 357   return __CONCAT(__,name) args2;                               \
 358 }
 359
 360 # define __inline_forward(rettype, name, args1, args2)  \
 361 extern __inline rettype name args1                      \
 362 {                                                       \
 363   return __CONCAT(__,name) args2;                       \
 364 }
 365
 366 __inline_forward_c(double,floor, (double __x), (__x))
 367 __inline_forward_c(double,ceil, (double __x), (__x))
 368 # ifdef __USE_MISC
 369 #  ifndef __USE_ISOC99 /* Conflict with macro of same name.  */
 370 __inline_forward_c(int,isinf, (double __value), (__value))
 371 #  endif
 372 __inline_forward_c(int,finite, (double __value), (__value))
 373 __inline_forward_c(double,scalbn, (double __x, int __n), (__x, __n))
 374 # endif
 375 # if defined __USE_MISC || defined __USE_XOPEN
 376 #  ifndef __USE_ISOC99 /* Conflict with macro of same name.  */
 377 __inline_forward_c(int,isnan, (double __value), (__value))
 378 #  endif
 379 # endif
 380 # ifdef __USE_ISOC99
 381 __inline_forward_c(double,scalbln, (double __x, long int __n), (__x, __n))
 382 __inline_forward_c(double,nearbyint, (double __value), (__value))
 383 __inline_forward_c(long int,lrint, (double __value), (__value))
 384 __inline_forward_c(double,fma, (double __x, double __y, double __z),
 385                    (__x, __y, __z))
 386 # endif
 387 # ifdef __USE_GNU
 388 __inline_forward(void,sincos, (double __x, double *__sinx, double *__cosx),
 389                  (__x, __sinx, __cosx))
 390 # endif
 391
 392 # if defined __USE_MISC || defined __USE_ISOC99
 393
 394 __inline_forward_c(float,floorf, (float __x), (__x))
 395 __inline_forward_c(float,ceilf, (float __x), (__x))
 396 #  ifdef __USE_MISC
 397 __inline_forward_c(int,isinff, (float __value), (__value))
 398 __inline_forward_c(int,finitef, (float __value), (__value))
 399 __inline_forward_c(float,scalbnf, (float __x, int __n), (__x, __n))
 400 __inline_forward_c(int,isnanf, (float __value), (__value))
 401 #  endif
 402 # ifdef __USE_ISOC99
 403 __inline_forward_c(float,scalblnf, (float __x, long int __n), (__x, __n))
 404 __inline_forward_c(float,nearbyintf, (float __value), (__value))
 405 __inline_forward_c(long int,lrintf, (float __value), (__value))
 406 __inline_forward_c(float,fmaf, (float __x, float __y, float __z),
 407                    (__x, __y, __z))
 408 # endif
 409 # ifdef __USE_GNU
 410 __inline_forward(void,sincosf, (float __x, float *__sinx, float *__cosx),
 411                  (__x, __sinx, __cosx))
 412 # endif
 413
 414 __inline_forward_c(long double,floorl, (long double __x), (__x))
 415 __inline_forward_c(long double,ceill, (long double __x), (__x))
 416 # ifdef __USE_MISC
 417 __inline_forward_c(int,isinfl, (long double __value), (__value))
 418 __inline_forward_c(int,finitel, (long double __value), (__value))
 419 __inline_forward_c(long double,scalbnl, (long double __x, int __n), (__x, __n))
 420 __inline_forward_c(int,isnanl, (long double __value), (__value))
 421 # endif
 422 # ifdef __USE_ISOC99
 423 __inline_forward_c(long double,scalblnl, (long double __x, long int __n),
 424                    (__x, __n))
 425 __inline_forward_c(long double,nearbyintl, (long double __value), (__value))
 426 __inline_forward_c(long int,lrintl, (long double __value), (__value))
 427 __inline_forward_c(long double,fmal,
 428                    (long double __x, long double __y, long double __z),
 429                    (__x, __y, __z))
 430 # endif
 431 # ifdef __USE_GNU
 432 __inline_forward(void,sincosl,
 433                  (long double __x, long double *__sinx, long double *__cosx),
 434                  (__x, __sinx, __cosx))
 435 # endif
 436
 437 #endif /* Use misc or ISO C99 */
 438
 439 #undef __inline_forward
 440 #undef __inline_forward_c
 441
 442 #endif /* !__NO_MATH_INLINES && __OPTIMIZE__ */
 443
 444 #endif
 445 #endif  /* GCC.  */