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, see 18 <http://www.gnu.org/licenses/>. */ 19 20 #ifdef __GNUC__ 21 22 #ifdef __USE_ISOC99 23 /* GCC 3.1 and up have builtins that actually can be used. */ 24 # if !__GNUC_PREREQ (3,1) 25 /* ISO C99 defines some macros to perform unordered comparisons. The 26 m68k FPU supports this with special opcodes and we should use them. 27 These must not be inline functions since we have to be able to handle 28 all floating-point types. */ 29 # undef isgreater 30 # undef isgreaterequal 31 # undef isless 32 # undef islessequal 33 # undef islessgreater 34 # undef isunordered 35 # define isgreater(x, y) \ 36 __extension__ \ 37 ({ char __result; \ 38 __asm__ ("fcmp%.x %2,%1; fsogt %0" \ 39 : "=dm" (__result) : "f" (x), "f" (y)); \ 40 __result != 0; }) 41 42 # define isgreaterequal(x, y) \ 43 __extension__ \ 44 ({ char __result; \ 45 __asm__ ("fcmp%.x %2,%1; fsoge %0" \ 46 : "=dm" (__result) : "f" (x), "f" (y)); \ 47 __result != 0; }) 48 49 # define isless(x, y) \ 50 __extension__ \ 51 ({ char __result; \ 52 __asm__ ("fcmp%.x %2,%1; fsolt %0" \ 53 : "=dm" (__result) : "f" (x), "f" (y)); \ 54 __result != 0; }) 55 56 # define islessequal(x, y) \ 57 __extension__ \ 58 ({ char __result; \ 59 __asm__ ("fcmp%.x %2,%1; fsole %0" \ 60 : "=dm" (__result) : "f" (x), "f" (y)); \ 61 __result != 0; }) 62 63 # define islessgreater(x, y) \ 64 __extension__ \ 65 ({ char __result; \ 66 __asm__ ("fcmp%.x %2,%1; fsogl %0" \ 67 : "=dm" (__result) : "f" (x), "f" (y)); \ 68 __result != 0; }) 69 70 # define isunordered(x, y) \ 71 __extension__ \ 72 ({ char __result; \ 73 __asm__ ("fcmp%.x %2,%1; fsun %0" \ 74 : "=dm" (__result) : "f" (x), "f" (y)); \ 75 __result != 0; }) 76 # endif /* GCC 3.1 */ 77 #endif 78 79 80 #if (!defined __NO_MATH_INLINES && defined __OPTIMIZE__) \ 81 || defined __LIBC_INTERNAL_MATH_INLINES 82 83 #ifdef __LIBC_INTERNAL_MATH_INLINES 84 /* This is used when defining the functions themselves. Define them with 85 __ names, and with `static inline' instead of `extern inline' so the 86 bodies will always be used, never an external function call. */ 87 # define __m81_u(x) __CONCAT(__,x) 88 # define __m81_inline static __inline 89 #else 90 # define __m81_u(x) x 91 # ifdef __cplusplus 92 # define __m81_inline __inline 93 # else 94 # define __m81_inline __extern_inline 95 # endif 96 # define __M81_MATH_INLINES 1 97 #endif 98 99 /* Define a const math function. */ 100 #define __m81_defun(rettype, func, args) \ 101 __m81_inline rettype __attribute__((__const__)) \ 102 __m81_u(func) args 103 104 /* Define the three variants of a math function that has a direct 105 implementation in the m68k fpu. FUNC is the name for C (which will be 106 suffixed with f and l for the float and long double version, resp). OP 107 is the name of the fpu operation (without leading f). */ 108 109 #if defined __USE_MISC || defined __USE_ISOC99 110 # define __inline_mathop(func, op) \ 111 __inline_mathop1(double, func, op) \ 112 __inline_mathop1(float, __CONCAT(func,f), op) \ 113 __inline_mathop1(long double, __CONCAT(func,l), op) 114 #else 115 # define __inline_mathop(func, op) \ 116 __inline_mathop1(double, func, op) 117 #endif 118 119 #define __inline_mathop1(float_type,func, op) \ 120 __m81_defun (float_type, func, (float_type __mathop_x)) \ 121 { \ 122 float_type __result; \ 123 __asm__("f" __STRING(op) "%.x %1, %0" : "=f" (__result) : "f" (__mathop_x));\ 124 return __result; \ 125 } 126 127 __inline_mathop(__atan, atan) 128 __inline_mathop(__cos, cos) 129 __inline_mathop(__sin, sin) 130 __inline_mathop(__tan, tan) 131 __inline_mathop(__tanh, tanh) 132 __inline_mathop(__fabs, abs) 133 134 #if defined __USE_MISC || defined __USE_XOPEN_EXTENDED || defined __USE_ISOC99 135 __inline_mathop(__rint, int) 136 __inline_mathop(__expm1, etoxm1) 137 __inline_mathop(__log1p, lognp1) 138 #endif 139 140 #ifdef __USE_MISC 141 __inline_mathop(__significand, getman) 142 #endif 143 144 #ifdef __USE_ISOC99 145 __inline_mathop(__trunc, intrz) 146 #endif 147 148 #if !defined __NO_MATH_INLINES && defined __OPTIMIZE__ 149 150 __inline_mathop(atan, atan) 151 __inline_mathop(cos, cos) 152 __inline_mathop(sin, sin) 153 __inline_mathop(tan, tan) 154 __inline_mathop(tanh, tanh) 155 156 # if defined __USE_MISC || defined __USE_XOPEN_EXTENDED || defined __USE_ISOC99 157 __inline_mathop(rint, int) 158 __inline_mathop(expm1, etoxm1) 159 __inline_mathop(log1p, lognp1) 160 # endif 161 162 # ifdef __USE_MISC 163 __inline_mathop(significand, getman) 164 # endif 165 166 # ifdef __USE_ISOC99 167 __inline_mathop(trunc, intrz) 168 # endif 169 170 #endif /* !__NO_MATH_INLINES && __OPTIMIZE__ */ 171 172 /* This macro contains the definition for the rest of the inline 173 functions, using FLOAT_TYPE as the domain type and S as the suffix 174 for the function names. */ 175 176 #define __inline_functions(float_type, s) \ 177 __m81_defun (float_type, __CONCAT(__floor,s), (float_type __x)) \ 178 { \ 179 float_type __result; \ 180 unsigned long int __ctrl_reg; \ 181 __asm__ __volatile__ ("fmove%.l %!, %0" : "=dm" (__ctrl_reg)); \ 182 /* Set rounding towards negative infinity. */ \ 183 __asm__ __volatile__ ("fmove%.l %0, %!" : /* No outputs. */ \ 184 : "dmi" ((__ctrl_reg & ~0x10) | 0x20)); \ 185 /* Convert X to an integer, using -Inf rounding. */ \ 186 __asm__ __volatile__ ("fint%.x %1, %0" : "=f" (__result) : "f" (__x)); \ 187 /* Restore the previous rounding mode. */ \ 188 __asm__ __volatile__ ("fmove%.l %0, %!" : /* No outputs. */ \ 189 : "dmi" (__ctrl_reg)); \ 190 return __result; \ 191 } \ 192 \ 193 __m81_defun (float_type, __CONCAT(__ceil,s), (float_type __x)) \ 194 { \ 195 float_type __result; \ 196 unsigned long int __ctrl_reg; \ 197 __asm__ __volatile__ ("fmove%.l %!, %0" : "=dm" (__ctrl_reg)); \ 198 /* Set rounding towards positive infinity. */ \ 199 __asm__ __volatile__ ("fmove%.l %0, %!" : /* No outputs. */ \ 200 : "dmi" (__ctrl_reg | 0x30)); \ 201 /* Convert X to an integer, using +Inf rounding. */ \ 202 __asm__ __volatile__ ("fint%.x %1, %0" : "=f" (__result) : "f" (__x)); \ 203 /* Restore the previous rounding mode. */ \ 204 __asm__ __volatile__ ("fmove%.l %0, %!" : /* No outputs. */ \ 205 : "dmi" (__ctrl_reg)); \ 206 return __result; \ 207 } 208 209 __inline_functions(double,) 210 #if defined __USE_MISC || defined __USE_ISOC99 211 __inline_functions(float,f) 212 __inline_functions(long double,l) 213 #endif 214 #undef __inline_functions 215 216 #ifdef __USE_MISC 217 218 # define __inline_functions(float_type, s) \ 219 __m81_defun (int, __CONCAT(__isinf,s), (float_type __value)) \ 220 { \ 221 /* There is no branch-condition for infinity, \ 222 so we must extract and examine the condition codes manually. */ \ 223 unsigned long int __fpsr; \ 224 __asm__("ftst%.x %1\n" \ 225 "fmove%.l %/fpsr, %0" : "=dm" (__fpsr) : "f" (__value)); \ 226 return (__fpsr & (2 << 24)) ? (__fpsr & (8 << 24) ? -1 : 1) : 0; \ 227 } \ 228 \ 229 __m81_defun (int, __CONCAT(__finite,s), (float_type __value)) \ 230 { \ 231 /* There is no branch-condition for infinity, so we must extract and \ 232 examine the condition codes manually. */ \ 233 unsigned long int __fpsr; \ 234 __asm__ ("ftst%.x %1\n" \ 235 "fmove%.l %/fpsr, %0" : "=dm" (__fpsr) : "f" (__value)); \ 236 return (__fpsr & (3 << 24)) == 0; \ 237 } \ 238 \ 239 __m81_defun (float_type, __CONCAT(__scalbn,s), \ 240 (float_type __x, int __n)) \ 241 { \ 242 float_type __result; \ 243 __asm__ ("fscale%.l %1, %0" : "=f" (__result) : "dmi" (__n), "0" (__x)); \ 244 return __result; \ 245 } 246 247 __inline_functions(double,) 248 __inline_functions(float,f) 249 __inline_functions(long double,l) 250 # undef __inline_functions 251 252 #endif /* Use misc. */ 253 254 #if defined __USE_MISC || defined __USE_XOPEN 255 256 # define __inline_functions(float_type, s) \ 257 __m81_defun (int, __CONCAT(__isnan,s), (float_type __value)) \ 258 { \ 259 char __result; \ 260 __asm__("ftst%.x %1\n" \ 261 "fsun %0" : "=dm" (__result) : "f" (__value)); \ 262 return __result; \ 263 } 264 265 __inline_functions(double,) 266 # ifdef __USE_MISC 267 __inline_functions(float,f) 268 __inline_functions(long double,l) 269 # endif 270 # undef __inline_functions 271 272 #endif 273 274 #ifdef __USE_ISOC99 275 276 # define __inline_functions(float_type, s) \ 277 __m81_defun (int, __CONCAT(__signbit,s), (float_type __value)) \ 278 { \ 279 /* There is no branch-condition for the sign bit, so we must extract \ 280 and examine the condition codes manually. */ \ 281 unsigned long int __fpsr; \ 282 __asm__ ("ftst%.x %1\n" \ 283 "fmove%.l %/fpsr, %0" : "=dm" (__fpsr) : "f" (__value)); \ 284 return (__fpsr >> 27) & 1; \ 285 } \ 286 \ 287 __m81_defun (float_type, __CONCAT(__scalbln,s), \ 288 (float_type __x, long int __n)) \ 289 { \ 290 return __CONCAT(__scalbn,s) (__x, __n); \ 291 } \ 292 \ 293 __m81_defun (float_type, __CONCAT(__nearbyint,s), (float_type __x)) \ 294 { \ 295 float_type __result; \ 296 unsigned long int __ctrl_reg; \ 297 __asm__ __volatile__ ("fmove%.l %!, %0" : "=dm" (__ctrl_reg)); \ 298 /* Temporarily disable the inexact exception. */ \ 299 __asm__ __volatile__ ("fmove%.l %0, %!" : /* No outputs. */ \ 300 : "dmi" (__ctrl_reg & ~0x200)); \ 301 __asm__ __volatile__ ("fint%.x %1, %0" : "=f" (__result) : "f" (__x)); \ 302 __asm__ __volatile__ ("fmove%.l %0, %!" : /* No outputs. */ \ 303 : "dmi" (__ctrl_reg)); \ 304 return __result; \ 305 } \ 306 \ 307 __m81_defun (long int, __CONCAT(__lrint,s), (float_type __x)) \ 308 { \ 309 long int __result; \ 310 __asm__ ("fmove%.l %1, %0" : "=dm" (__result) : "f" (__x)); \ 311 return __result; \ 312 } \ 313 \ 314 __m81_inline float_type \ 315 __m81_u(__CONCAT(__fma,s))(float_type __x, float_type __y, \ 316 float_type __z) \ 317 { \ 318 return (__x * __y) + __z; \ 319 } 320 321 __inline_functions (double,) 322 __inline_functions (float,f) 323 __inline_functions (long double,l) 324 # undef __inline_functions 325 326 #endif /* Use ISO C9x */ 327 328 #ifdef __USE_GNU 329 330 # define __inline_functions(float_type, s) \ 331 __m81_inline void \ 332 __m81_u(__CONCAT(__sincos,s))(float_type __x, float_type *__sinx, \ 333 float_type *__cosx) \ 334 { \ 335 __asm__ ("fsincos%.x %2,%1:%0" \ 336 : "=f" (*__sinx), "=f" (*__cosx) : "f" (__x)); \ 337 } 338 339 __inline_functions (double,) 340 __inline_functions (float,f) 341 __inline_functions (long double,l) 342 # undef __inline_functions 343 344 #endif 345 346 #if !defined __NO_MATH_INLINES && defined __OPTIMIZE__ 347 348 /* Define inline versions of the user visible functions. */ 349 350 /* Note that there must be no whitespace before the argument passed for 351 NAME, to make token pasting work correctly with -traditional. */ 352 # define __inline_forward_c(rettype, name, args1, args2) \ 353 __extern_inline rettype __attribute__((__const__)) \ 354 name args1 \ 355 { \ 356 return __CONCAT(__,name) args2; \ 357 } 358 359 # define __inline_forward(rettype, name, args1, args2) \ 360 __extern_inline rettype name args1 \ 361 { \ 362 return __CONCAT(__,name) args2; \ 363 } 364 365 __inline_forward_c(double,floor, (double __x), (__x)) 366 __inline_forward_c(double,ceil, (double __x), (__x)) 367 # ifdef __USE_MISC 368 # ifndef __USE_ISOC99 /* Conflict with macro of same name. */ 369 __inline_forward_c(int,isinf, (double __value), (__value)) 370 # endif 371 __inline_forward_c(int,finite, (double __value), (__value)) 372 __inline_forward_c(double,scalbn, (double __x, int __n), (__x, __n)) 373 # endif 374 # if defined __USE_MISC || defined __USE_XOPEN 375 # ifndef __USE_ISOC99 /* Conflict with macro of same name. */ 376 __inline_forward_c(int,isnan, (double __value), (__value)) 377 # endif 378 # endif 379 # ifdef __USE_ISOC99 380 __inline_forward_c(double,scalbln, (double __x, long int __n), (__x, __n)) 381 __inline_forward_c(double,nearbyint, (double __value), (__value)) 382 __inline_forward_c(long int,lrint, (double __value), (__value)) 383 __inline_forward_c(double,fma, (double __x, double __y, double __z), 384 (__x, __y, __z)) 385 # endif 386 # ifdef __USE_GNU 387 __inline_forward(void,sincos, (double __x, double *__sinx, double *__cosx), 388 (__x, __sinx, __cosx)) 389 # endif 390 391 # if defined __USE_MISC || defined __USE_ISOC99 392 393 __inline_forward_c(float,floorf, (float __x), (__x)) 394 __inline_forward_c(float,ceilf, (float __x), (__x)) 395 # ifdef __USE_MISC 396 __inline_forward_c(int,isinff, (float __value), (__value)) 397 __inline_forward_c(int,finitef, (float __value), (__value)) 398 __inline_forward_c(float,scalbnf, (float __x, int __n), (__x, __n)) 399 __inline_forward_c(int,isnanf, (float __value), (__value)) 400 # endif 401 # ifdef __USE_ISOC99 402 __inline_forward_c(float,scalblnf, (float __x, long int __n), (__x, __n)) 403 __inline_forward_c(float,nearbyintf, (float __value), (__value)) 404 __inline_forward_c(long int,lrintf, (float __value), (__value)) 405 __inline_forward_c(float,fmaf, (float __x, float __y, float __z), 406 (__x, __y, __z)) 407 # endif 408 # ifdef __USE_GNU 409 __inline_forward(void,sincosf, (float __x, float *__sinx, float *__cosx), 410 (__x, __sinx, __cosx)) 411 # endif 412 413 __inline_forward_c(long double,floorl, (long double __x), (__x)) 414 __inline_forward_c(long double,ceill, (long double __x), (__x)) 415 # ifdef __USE_MISC 416 __inline_forward_c(int,isinfl, (long double __value), (__value)) 417 __inline_forward_c(int,finitel, (long double __value), (__value)) 418 __inline_forward_c(long double,scalbnl, (long double __x, int __n), (__x, __n)) 419 __inline_forward_c(int,isnanl, (long double __value), (__value)) 420 # endif 421 # ifdef __USE_ISOC99 422 __inline_forward_c(long double,scalblnl, (long double __x, long int __n), 423 (__x, __n)) 424 __inline_forward_c(long double,nearbyintl, (long double __value), (__value)) 425 __inline_forward_c(long int,lrintl, (long double __value), (__value)) 426 __inline_forward_c(long double,fmal, 427 (long double __x, long double __y, long double __z), 428 (__x, __y, __z)) 429 # endif 430 # ifdef __USE_GNU 431 __inline_forward(void,sincosl, 432 (long double __x, long double *__sinx, long double *__cosx), 433 (__x, __sinx, __cosx)) 434 # endif 435 436 #endif /* Use misc or ISO C99 */ 437 438 #undef __inline_forward 439 #undef __inline_forward_c 440 441 #endif /* !__NO_MATH_INLINES && __OPTIMIZE__ */ 442 443 #endif 444 #endif /* GCC. */ 445