[8833] | 1 | /* Front-end tree definitions for GNU compiler. |
---|
| 2 | Copyright (C) 1989, 1991, 1994 Free Software Foundation, Inc. |
---|
| 3 | |
---|
| 4 | This file is part of GNU CC. |
---|
| 5 | |
---|
| 6 | GNU CC is free software; you can redistribute it and/or modify |
---|
| 7 | it under the terms of the GNU General Public License as published by |
---|
| 8 | the Free Software Foundation; either version 2, or (at your option) |
---|
| 9 | any later version. |
---|
| 10 | |
---|
| 11 | GNU CC 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 |
---|
| 14 | GNU General Public License for more details. |
---|
| 15 | |
---|
| 16 | You should have received a copy of the GNU General Public License |
---|
| 17 | along with GNU CC; see the file COPYING. If not, write to |
---|
| 18 | the Free Software Foundation, 59 Temple Place - Suite 330, |
---|
| 19 | Boston, MA 02111-1307, USA. */ |
---|
| 20 | |
---|
| 21 | #ifndef REAL_H_INCLUDED |
---|
| 22 | #define REAL_H_INCLUDED |
---|
| 23 | |
---|
| 24 | /* Define codes for all the float formats that we know of. */ |
---|
| 25 | #define UNKNOWN_FLOAT_FORMAT 0 |
---|
| 26 | #define IEEE_FLOAT_FORMAT 1 |
---|
| 27 | #define VAX_FLOAT_FORMAT 2 |
---|
| 28 | #define IBM_FLOAT_FORMAT 3 |
---|
| 29 | |
---|
| 30 | /* Default to IEEE float if not specified. Nearly all machines use it. */ |
---|
| 31 | |
---|
| 32 | #ifndef TARGET_FLOAT_FORMAT |
---|
| 33 | #define TARGET_FLOAT_FORMAT IEEE_FLOAT_FORMAT |
---|
| 34 | #endif |
---|
| 35 | |
---|
| 36 | #ifndef HOST_FLOAT_FORMAT |
---|
| 37 | #define HOST_FLOAT_FORMAT IEEE_FLOAT_FORMAT |
---|
| 38 | #endif |
---|
| 39 | |
---|
| 40 | #if TARGET_FLOAT_FORMAT == IEEE_FLOAT_FORMAT |
---|
| 41 | #define REAL_INFINITY |
---|
| 42 | #endif |
---|
| 43 | |
---|
| 44 | /* If FLOAT_WORDS_BIG_ENDIAN and HOST_FLOAT_WORDS_BIG_ENDIAN are not defined |
---|
| 45 | in the header files, then this implies the word-endianness is the same as |
---|
| 46 | for integers. */ |
---|
| 47 | |
---|
| 48 | /* This is defined 0 or 1, like WORDS_BIG_ENDIAN. */ |
---|
| 49 | #ifndef FLOAT_WORDS_BIG_ENDIAN |
---|
| 50 | #define FLOAT_WORDS_BIG_ENDIAN WORDS_BIG_ENDIAN |
---|
| 51 | #endif |
---|
| 52 | |
---|
| 53 | /* This is defined 0 or 1, unlike HOST_WORDS_BIG_ENDIAN. */ |
---|
| 54 | #ifndef HOST_FLOAT_WORDS_BIG_ENDIAN |
---|
| 55 | #ifdef HOST_WORDS_BIG_ENDIAN |
---|
| 56 | #define HOST_FLOAT_WORDS_BIG_ENDIAN 1 |
---|
| 57 | #else |
---|
| 58 | #define HOST_FLOAT_WORDS_BIG_ENDIAN 0 |
---|
| 59 | #endif |
---|
| 60 | #endif |
---|
| 61 | |
---|
| 62 | /* Defining REAL_ARITHMETIC invokes a floating point emulator |
---|
| 63 | that can produce a target machine format differing by more |
---|
| 64 | than just endian-ness from the host's format. The emulator |
---|
| 65 | is also used to support extended real XFmode. */ |
---|
| 66 | #ifndef LONG_DOUBLE_TYPE_SIZE |
---|
| 67 | #define LONG_DOUBLE_TYPE_SIZE 64 |
---|
| 68 | #endif |
---|
| 69 | #if (LONG_DOUBLE_TYPE_SIZE == 96) || (LONG_DOUBLE_TYPE_SIZE == 128) |
---|
| 70 | #ifndef REAL_ARITHMETIC |
---|
| 71 | #define REAL_ARITHMETIC |
---|
| 72 | #endif |
---|
| 73 | #endif |
---|
| 74 | #ifdef REAL_ARITHMETIC |
---|
| 75 | /* **** Start of software floating point emulator interface macros **** */ |
---|
| 76 | |
---|
| 77 | /* Support 80-bit extended real XFmode if LONG_DOUBLE_TYPE_SIZE |
---|
| 78 | has been defined to be 96 in the tm.h machine file. */ |
---|
| 79 | #if (LONG_DOUBLE_TYPE_SIZE == 96) |
---|
| 80 | #define REAL_IS_NOT_DOUBLE |
---|
| 81 | #define REAL_ARITHMETIC |
---|
| 82 | typedef struct { |
---|
| 83 | HOST_WIDE_INT r[(11 + sizeof (HOST_WIDE_INT))/(sizeof (HOST_WIDE_INT))]; |
---|
| 84 | } realvaluetype; |
---|
| 85 | #define REAL_VALUE_TYPE realvaluetype |
---|
| 86 | |
---|
| 87 | #else /* no XFmode support */ |
---|
| 88 | |
---|
| 89 | #if (LONG_DOUBLE_TYPE_SIZE == 128) |
---|
| 90 | |
---|
| 91 | #define REAL_IS_NOT_DOUBLE |
---|
| 92 | #define REAL_ARITHMETIC |
---|
| 93 | typedef struct { |
---|
| 94 | HOST_WIDE_INT r[(19 + sizeof (HOST_WIDE_INT))/(sizeof (HOST_WIDE_INT))]; |
---|
| 95 | } realvaluetype; |
---|
| 96 | #define REAL_VALUE_TYPE realvaluetype |
---|
| 97 | |
---|
| 98 | #else /* not TFmode */ |
---|
| 99 | |
---|
| 100 | #if HOST_FLOAT_FORMAT != TARGET_FLOAT_FORMAT |
---|
| 101 | /* If no XFmode support, then a REAL_VALUE_TYPE is 64 bits wide |
---|
| 102 | but it is not necessarily a host machine double. */ |
---|
| 103 | #define REAL_IS_NOT_DOUBLE |
---|
| 104 | typedef struct { |
---|
| 105 | HOST_WIDE_INT r[(7 + sizeof (HOST_WIDE_INT))/(sizeof (HOST_WIDE_INT))]; |
---|
| 106 | } realvaluetype; |
---|
| 107 | #define REAL_VALUE_TYPE realvaluetype |
---|
| 108 | #else |
---|
| 109 | /* If host and target formats are compatible, then a REAL_VALUE_TYPE |
---|
| 110 | is actually a host machine double. */ |
---|
| 111 | #define REAL_VALUE_TYPE double |
---|
| 112 | #endif |
---|
| 113 | |
---|
| 114 | #endif /* no TFmode support */ |
---|
| 115 | #endif /* no XFmode support */ |
---|
| 116 | |
---|
| 117 | extern int significand_size PROTO((enum machine_mode)); |
---|
| 118 | |
---|
| 119 | /* If emulation has been enabled by defining REAL_ARITHMETIC or by |
---|
| 120 | setting LONG_DOUBLE_TYPE_SIZE to 96 or 128, then define macros so that |
---|
| 121 | they invoke emulator functions. This will succeed only if the machine |
---|
| 122 | files have been updated to use these macros in place of any |
---|
| 123 | references to host machine `double' or `float' types. */ |
---|
| 124 | #ifdef REAL_ARITHMETIC |
---|
| 125 | #undef REAL_ARITHMETIC |
---|
| 126 | #define REAL_ARITHMETIC(value, code, d1, d2) \ |
---|
| 127 | earith (&(value), (code), &(d1), &(d2)) |
---|
| 128 | |
---|
| 129 | /* Declare functions in real.c. */ |
---|
| 130 | extern void earith PROTO((REAL_VALUE_TYPE *, int, |
---|
| 131 | REAL_VALUE_TYPE *, REAL_VALUE_TYPE *)); |
---|
| 132 | extern REAL_VALUE_TYPE etrunci PROTO((REAL_VALUE_TYPE)); |
---|
| 133 | extern REAL_VALUE_TYPE etruncui PROTO((REAL_VALUE_TYPE)); |
---|
| 134 | extern REAL_VALUE_TYPE ereal_atof PROTO((char *, enum machine_mode)); |
---|
| 135 | extern REAL_VALUE_TYPE ereal_negate PROTO((REAL_VALUE_TYPE)); |
---|
| 136 | extern HOST_WIDE_INT efixi PROTO((REAL_VALUE_TYPE)); |
---|
| 137 | extern unsigned HOST_WIDE_INT efixui PROTO((REAL_VALUE_TYPE)); |
---|
| 138 | extern void ereal_from_int PROTO((REAL_VALUE_TYPE *, |
---|
| 139 | HOST_WIDE_INT, HOST_WIDE_INT)); |
---|
| 140 | extern void ereal_from_uint PROTO((REAL_VALUE_TYPE *, |
---|
| 141 | unsigned HOST_WIDE_INT, |
---|
| 142 | unsigned HOST_WIDE_INT)); |
---|
| 143 | extern void ereal_to_int PROTO((HOST_WIDE_INT *, HOST_WIDE_INT *, |
---|
| 144 | REAL_VALUE_TYPE)); |
---|
| 145 | extern REAL_VALUE_TYPE ereal_ldexp PROTO((REAL_VALUE_TYPE, int)); |
---|
| 146 | |
---|
| 147 | extern void etartdouble PROTO((REAL_VALUE_TYPE, long *)); |
---|
| 148 | extern void etarldouble PROTO((REAL_VALUE_TYPE, long *)); |
---|
| 149 | extern void etardouble PROTO((REAL_VALUE_TYPE, long *)); |
---|
| 150 | extern long etarsingle PROTO((REAL_VALUE_TYPE)); |
---|
| 151 | extern void ereal_to_decimal PROTO((REAL_VALUE_TYPE, char *)); |
---|
| 152 | extern int ereal_cmp PROTO((REAL_VALUE_TYPE, REAL_VALUE_TYPE)); |
---|
| 153 | extern int ereal_isneg PROTO((REAL_VALUE_TYPE)); |
---|
| 154 | extern REAL_VALUE_TYPE ereal_from_float PROTO((HOST_WIDE_INT)); |
---|
| 155 | extern REAL_VALUE_TYPE ereal_from_double PROTO((HOST_WIDE_INT *)); |
---|
| 156 | |
---|
| 157 | #define REAL_VALUES_EQUAL(x, y) (ereal_cmp ((x), (y)) == 0) |
---|
| 158 | /* true if x < y : */ |
---|
| 159 | #define REAL_VALUES_LESS(x, y) (ereal_cmp ((x), (y)) == -1) |
---|
| 160 | #define REAL_VALUE_LDEXP(x, n) ereal_ldexp (x, n) |
---|
| 161 | |
---|
| 162 | /* These return REAL_VALUE_TYPE: */ |
---|
| 163 | #define REAL_VALUE_RNDZINT(x) (etrunci (x)) |
---|
| 164 | #define REAL_VALUE_UNSIGNED_RNDZINT(x) (etruncui (x)) |
---|
| 165 | extern REAL_VALUE_TYPE real_value_truncate (); |
---|
| 166 | #define REAL_VALUE_TRUNCATE(mode, x) real_value_truncate (mode, x) |
---|
| 167 | |
---|
| 168 | /* These return HOST_WIDE_INT: */ |
---|
| 169 | /* Convert a floating-point value to integer, rounding toward zero. */ |
---|
| 170 | #define REAL_VALUE_FIX(x) (efixi (x)) |
---|
| 171 | /* Convert a floating-point value to unsigned integer, rounding |
---|
| 172 | toward zero. */ |
---|
| 173 | #define REAL_VALUE_UNSIGNED_FIX(x) (efixui (x)) |
---|
| 174 | |
---|
| 175 | #define REAL_VALUE_ATOF ereal_atof |
---|
| 176 | #define REAL_VALUE_NEGATE ereal_negate |
---|
| 177 | |
---|
| 178 | #define REAL_VALUE_MINUS_ZERO(x) \ |
---|
| 179 | ((ereal_cmp (x, dconst0) == 0) && (ereal_isneg (x) != 0 )) |
---|
| 180 | |
---|
| 181 | #define REAL_VALUE_TO_INT ereal_to_int |
---|
| 182 | |
---|
| 183 | /* Here the cast to HOST_WIDE_INT sign-extends arguments such as ~0. */ |
---|
| 184 | #define REAL_VALUE_FROM_INT(d, lo, hi) \ |
---|
| 185 | ereal_from_int (&d, (HOST_WIDE_INT) (lo), (HOST_WIDE_INT) (hi)) |
---|
| 186 | |
---|
| 187 | #define REAL_VALUE_FROM_UNSIGNED_INT(d, lo, hi) (ereal_from_uint (&d, lo, hi)) |
---|
| 188 | |
---|
| 189 | /* IN is a REAL_VALUE_TYPE. OUT is an array of longs. */ |
---|
| 190 | #if LONG_DOUBLE_TYPE_SIZE == 96 |
---|
| 191 | #define REAL_VALUE_TO_TARGET_LONG_DOUBLE(IN, OUT) (etarldouble ((IN), (OUT))) |
---|
| 192 | #else |
---|
| 193 | #define REAL_VALUE_TO_TARGET_LONG_DOUBLE(IN, OUT) (etartdouble ((IN), (OUT))) |
---|
| 194 | #endif |
---|
| 195 | #define REAL_VALUE_TO_TARGET_DOUBLE(IN, OUT) (etardouble ((IN), (OUT))) |
---|
| 196 | |
---|
| 197 | /* IN is a REAL_VALUE_TYPE. OUT is a long. */ |
---|
| 198 | #define REAL_VALUE_TO_TARGET_SINGLE(IN, OUT) ((OUT) = etarsingle ((IN))) |
---|
| 199 | |
---|
| 200 | /* d is an array of HOST_WIDE_INT that holds a double precision |
---|
| 201 | value in the target computer's floating point format. */ |
---|
| 202 | #define REAL_VALUE_FROM_TARGET_DOUBLE(d) (ereal_from_double (d)) |
---|
| 203 | |
---|
| 204 | /* f is a HOST_WIDE_INT containing a single precision target float value. */ |
---|
| 205 | #define REAL_VALUE_FROM_TARGET_SINGLE(f) (ereal_from_float (f)) |
---|
| 206 | |
---|
| 207 | /* Conversions to decimal ASCII string. */ |
---|
| 208 | #define REAL_VALUE_TO_DECIMAL(r, fmt, s) (ereal_to_decimal (r, s)) |
---|
| 209 | |
---|
| 210 | #endif /* REAL_ARITHMETIC defined */ |
---|
| 211 | |
---|
| 212 | /* **** End of software floating point emulator interface macros **** */ |
---|
| 213 | #else /* No XFmode or TFmode and REAL_ARITHMETIC not defined */ |
---|
| 214 | |
---|
| 215 | /* old interface */ |
---|
| 216 | #ifdef REAL_ARITHMETIC |
---|
| 217 | /* Defining REAL_IS_NOT_DOUBLE breaks certain initializations |
---|
| 218 | when REAL_ARITHMETIC etc. are not defined. */ |
---|
| 219 | |
---|
| 220 | /* Now see if the host and target machines use the same format. |
---|
| 221 | If not, define REAL_IS_NOT_DOUBLE (even if we end up representing |
---|
| 222 | reals as doubles because we have no better way in this cross compiler.) |
---|
| 223 | This turns off various optimizations that can happen when we know the |
---|
| 224 | compiler's float format matches the target's float format. |
---|
| 225 | */ |
---|
| 226 | #if HOST_FLOAT_FORMAT != TARGET_FLOAT_FORMAT |
---|
| 227 | #define REAL_IS_NOT_DOUBLE |
---|
| 228 | #ifndef REAL_VALUE_TYPE |
---|
| 229 | typedef struct { |
---|
| 230 | HOST_WIDE_INT r[sizeof (double)/sizeof (HOST_WIDE_INT)]; |
---|
| 231 | } realvaluetype; |
---|
| 232 | #define REAL_VALUE_TYPE realvaluetype |
---|
| 233 | #endif /* no REAL_VALUE_TYPE */ |
---|
| 234 | #endif /* formats differ */ |
---|
| 235 | #endif /* 0 */ |
---|
| 236 | |
---|
| 237 | #endif /* emulator not used */ |
---|
| 238 | |
---|
| 239 | /* If we are not cross-compiling, use a `double' to represent the |
---|
| 240 | floating-point value. Otherwise, use some other type |
---|
| 241 | (probably a struct containing an array of longs). */ |
---|
| 242 | #ifndef REAL_VALUE_TYPE |
---|
| 243 | #define REAL_VALUE_TYPE double |
---|
| 244 | #else |
---|
| 245 | #define REAL_IS_NOT_DOUBLE |
---|
| 246 | #endif |
---|
| 247 | |
---|
| 248 | #if HOST_FLOAT_FORMAT == TARGET_FLOAT_FORMAT |
---|
| 249 | |
---|
| 250 | /* Convert a type `double' value in host format first to a type `float' |
---|
| 251 | value in host format and then to a single type `long' value which |
---|
| 252 | is the bitwise equivalent of the `float' value. */ |
---|
| 253 | #ifndef REAL_VALUE_TO_TARGET_SINGLE |
---|
| 254 | #define REAL_VALUE_TO_TARGET_SINGLE(IN, OUT) \ |
---|
| 255 | do { float f = (float) (IN); \ |
---|
| 256 | (OUT) = *(long *) &f; \ |
---|
| 257 | } while (0) |
---|
| 258 | #endif |
---|
| 259 | |
---|
| 260 | /* Convert a type `double' value in host format to a pair of type `long' |
---|
| 261 | values which is its bitwise equivalent, but put the two words into |
---|
| 262 | proper word order for the target. */ |
---|
| 263 | #ifndef REAL_VALUE_TO_TARGET_DOUBLE |
---|
| 264 | #define REAL_VALUE_TO_TARGET_DOUBLE(IN, OUT) \ |
---|
| 265 | do { REAL_VALUE_TYPE in = (IN); /* Make sure it's not in a register. */\ |
---|
| 266 | if (HOST_FLOAT_WORDS_BIG_ENDIAN == FLOAT_WORDS_BIG_ENDIAN) \ |
---|
| 267 | { \ |
---|
| 268 | (OUT)[0] = ((long *) &in)[0]; \ |
---|
| 269 | (OUT)[1] = ((long *) &in)[1]; \ |
---|
| 270 | } \ |
---|
| 271 | else \ |
---|
| 272 | { \ |
---|
| 273 | (OUT)[1] = ((long *) &in)[0]; \ |
---|
| 274 | (OUT)[0] = ((long *) &in)[1]; \ |
---|
| 275 | } \ |
---|
| 276 | } while (0) |
---|
| 277 | #endif |
---|
| 278 | #endif /* HOST_FLOAT_FORMAT == TARGET_FLOAT_FORMAT */ |
---|
| 279 | |
---|
| 280 | /* In this configuration, double and long double are the same. */ |
---|
| 281 | #ifndef REAL_VALUE_TO_TARGET_LONG_DOUBLE |
---|
| 282 | #define REAL_VALUE_TO_TARGET_LONG_DOUBLE(a, b) REAL_VALUE_TO_TARGET_DOUBLE (a, b) |
---|
| 283 | #endif |
---|
| 284 | |
---|
| 285 | /* Compare two floating-point values for equality. */ |
---|
| 286 | #ifndef REAL_VALUES_EQUAL |
---|
| 287 | #define REAL_VALUES_EQUAL(x, y) ((x) == (y)) |
---|
| 288 | #endif |
---|
| 289 | |
---|
| 290 | /* Compare two floating-point values for less than. */ |
---|
| 291 | #ifndef REAL_VALUES_LESS |
---|
| 292 | #define REAL_VALUES_LESS(x, y) ((x) < (y)) |
---|
| 293 | #endif |
---|
| 294 | |
---|
| 295 | /* Truncate toward zero to an integer floating-point value. */ |
---|
| 296 | #ifndef REAL_VALUE_RNDZINT |
---|
| 297 | #define REAL_VALUE_RNDZINT(x) ((double) ((int) (x))) |
---|
| 298 | #endif |
---|
| 299 | |
---|
| 300 | /* Truncate toward zero to an unsigned integer floating-point value. */ |
---|
| 301 | #ifndef REAL_VALUE_UNSIGNED_RNDZINT |
---|
| 302 | #define REAL_VALUE_UNSIGNED_RNDZINT(x) ((double) ((unsigned int) (x))) |
---|
| 303 | #endif |
---|
| 304 | |
---|
| 305 | /* Convert a floating-point value to integer, rounding toward zero. */ |
---|
| 306 | #ifndef REAL_VALUE_FIX |
---|
| 307 | #define REAL_VALUE_FIX(x) ((int) (x)) |
---|
| 308 | #endif |
---|
| 309 | |
---|
| 310 | /* Convert a floating-point value to unsigned integer, rounding |
---|
| 311 | toward zero. */ |
---|
| 312 | #ifndef REAL_VALUE_UNSIGNED_FIX |
---|
| 313 | #define REAL_VALUE_UNSIGNED_FIX(x) ((unsigned int) (x)) |
---|
| 314 | #endif |
---|
| 315 | |
---|
| 316 | /* Scale X by Y powers of 2. */ |
---|
| 317 | #ifndef REAL_VALUE_LDEXP |
---|
| 318 | #define REAL_VALUE_LDEXP(x, y) ldexp (x, y) |
---|
| 319 | extern double ldexp (); |
---|
| 320 | #endif |
---|
| 321 | |
---|
| 322 | /* Convert the string X to a floating-point value. */ |
---|
| 323 | #ifndef REAL_VALUE_ATOF |
---|
| 324 | #if 1 |
---|
| 325 | /* Use real.c to convert decimal numbers to binary, ... */ |
---|
| 326 | REAL_VALUE_TYPE ereal_atof (); |
---|
| 327 | #define REAL_VALUE_ATOF(x, s) ereal_atof (x, s) |
---|
| 328 | #else |
---|
| 329 | /* ... or, if you like the host computer's atof, go ahead and use it: */ |
---|
| 330 | #define REAL_VALUE_ATOF(x, s) atof (x) |
---|
| 331 | #if defined (MIPSEL) || defined (MIPSEB) |
---|
| 332 | /* MIPS compiler can't handle parens around the function name. |
---|
| 333 | This problem *does not* appear to be connected with any |
---|
| 334 | macro definition for atof. It does not seem there is one. */ |
---|
| 335 | extern double atof (); |
---|
| 336 | #else |
---|
| 337 | extern double (atof) (); |
---|
| 338 | #endif |
---|
| 339 | #endif |
---|
| 340 | #endif |
---|
| 341 | |
---|
| 342 | /* Negate the floating-point value X. */ |
---|
| 343 | #ifndef REAL_VALUE_NEGATE |
---|
| 344 | #define REAL_VALUE_NEGATE(x) (- (x)) |
---|
| 345 | #endif |
---|
| 346 | |
---|
| 347 | /* Truncate the floating-point value X to mode MODE. This is correct only |
---|
| 348 | for the most common case where the host and target have objects of the same |
---|
| 349 | size and where `float' is SFmode. */ |
---|
| 350 | |
---|
| 351 | /* Don't use REAL_VALUE_TRUNCATE directly--always call real_value_truncate. */ |
---|
| 352 | extern REAL_VALUE_TYPE real_value_truncate (); |
---|
| 353 | |
---|
| 354 | #ifndef REAL_VALUE_TRUNCATE |
---|
| 355 | #define REAL_VALUE_TRUNCATE(mode, x) \ |
---|
| 356 | (GET_MODE_BITSIZE (mode) == sizeof (float) * HOST_BITS_PER_CHAR \ |
---|
| 357 | ? (float) (x) : (x)) |
---|
| 358 | #endif |
---|
| 359 | |
---|
| 360 | /* Determine whether a floating-point value X is infinite. */ |
---|
| 361 | #ifndef REAL_VALUE_ISINF |
---|
| 362 | #define REAL_VALUE_ISINF(x) (target_isinf (x)) |
---|
| 363 | #endif |
---|
| 364 | |
---|
| 365 | /* Determine whether a floating-point value X is a NaN. */ |
---|
| 366 | #ifndef REAL_VALUE_ISNAN |
---|
| 367 | #define REAL_VALUE_ISNAN(x) (target_isnan (x)) |
---|
| 368 | #endif |
---|
| 369 | |
---|
| 370 | /* Determine whether a floating-point value X is negative. */ |
---|
| 371 | #ifndef REAL_VALUE_NEGATIVE |
---|
| 372 | #define REAL_VALUE_NEGATIVE(x) (target_negative (x)) |
---|
| 373 | #endif |
---|
| 374 | |
---|
| 375 | /* Determine whether a floating-point value X is minus 0. */ |
---|
| 376 | #ifndef REAL_VALUE_MINUS_ZERO |
---|
| 377 | #define REAL_VALUE_MINUS_ZERO(x) ((x) == 0 && REAL_VALUE_NEGATIVE (x)) |
---|
| 378 | #endif |
---|
| 379 | |
---|
| 380 | /* Constant real values 0, 1, 2, and -1. */ |
---|
| 381 | |
---|
| 382 | extern REAL_VALUE_TYPE dconst0; |
---|
| 383 | extern REAL_VALUE_TYPE dconst1; |
---|
| 384 | extern REAL_VALUE_TYPE dconst2; |
---|
| 385 | extern REAL_VALUE_TYPE dconstm1; |
---|
| 386 | |
---|
| 387 | /* Union type used for extracting real values from CONST_DOUBLEs |
---|
| 388 | or putting them in. */ |
---|
| 389 | |
---|
| 390 | union real_extract |
---|
| 391 | { |
---|
| 392 | REAL_VALUE_TYPE d; |
---|
| 393 | HOST_WIDE_INT i[sizeof (REAL_VALUE_TYPE) / sizeof (HOST_WIDE_INT)]; |
---|
| 394 | }; |
---|
| 395 | |
---|
| 396 | /* For a CONST_DOUBLE: |
---|
| 397 | The usual two ints that hold the value. |
---|
| 398 | For a DImode, that is all there are; |
---|
| 399 | and CONST_DOUBLE_LOW is the low-order word and ..._HIGH the high-order. |
---|
| 400 | For a float, the number of ints varies, |
---|
| 401 | and CONST_DOUBLE_LOW is the one that should come first *in memory*. |
---|
| 402 | So use &CONST_DOUBLE_LOW(r) as the address of an array of ints. */ |
---|
| 403 | #define CONST_DOUBLE_LOW(r) XWINT (r, 2) |
---|
| 404 | #define CONST_DOUBLE_HIGH(r) XWINT (r, 3) |
---|
| 405 | |
---|
| 406 | /* Link for chain of all CONST_DOUBLEs in use in current function. */ |
---|
| 407 | #define CONST_DOUBLE_CHAIN(r) XEXP (r, 1) |
---|
| 408 | /* The MEM which represents this CONST_DOUBLE's value in memory, |
---|
| 409 | or const0_rtx if no MEM has been made for it yet, |
---|
| 410 | or cc0_rtx if it is not on the chain. */ |
---|
| 411 | #define CONST_DOUBLE_MEM(r) XEXP (r, 0) |
---|
| 412 | |
---|
| 413 | /* Function to return a real value (not a tree node) |
---|
| 414 | from a given integer constant. */ |
---|
| 415 | REAL_VALUE_TYPE real_value_from_int_cst (); |
---|
| 416 | |
---|
| 417 | /* Given a CONST_DOUBLE in FROM, store into TO the value it represents. */ |
---|
| 418 | |
---|
| 419 | #define REAL_VALUE_FROM_CONST_DOUBLE(to, from) \ |
---|
| 420 | do { union real_extract u; \ |
---|
| 421 | bcopy ((char *) &CONST_DOUBLE_LOW ((from)), (char *) &u, sizeof u); \ |
---|
| 422 | to = u.d; } while (0) |
---|
| 423 | |
---|
| 424 | /* Return a CONST_DOUBLE with value R and mode M. */ |
---|
| 425 | |
---|
| 426 | #define CONST_DOUBLE_FROM_REAL_VALUE(r, m) immed_real_const_1 (r, m) |
---|
| 427 | extern struct rtx_def *immed_real_const_1 PROTO((REAL_VALUE_TYPE, |
---|
| 428 | enum machine_mode)); |
---|
| 429 | |
---|
| 430 | |
---|
| 431 | /* Convert a floating point value `r', that can be interpreted |
---|
| 432 | as a host machine float or double, to a decimal ASCII string `s' |
---|
| 433 | using printf format string `fmt'. */ |
---|
| 434 | #ifndef REAL_VALUE_TO_DECIMAL |
---|
| 435 | #define REAL_VALUE_TO_DECIMAL(r, fmt, s) (sprintf (s, fmt, r)) |
---|
| 436 | #endif |
---|
| 437 | |
---|
| 438 | #endif /* Not REAL_H_INCLUDED */ |
---|