1 /* Machine mode definitions for GCC; included by rtl.h and tree.h. 2 Copyright (C) 1991-2013 Free Software Foundation, Inc. 3 4 This file is part of GCC. 5 6 GCC is free software; you can redistribute it and/or modify it under 7 the terms of the GNU General Public License as published by the Free 8 Software Foundation; either version 3, or (at your option) any later 9 version. 10 11 GCC is distributed in the hope that it will be useful, but WITHOUT ANY 12 WARRANTY; without even the implied warranty of MERCHANTABILITY or 13 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 14 for more details. 15 16 You should have received a copy of the GNU General Public License 17 along with GCC; see the file COPYING3. If not see 18 <http://www.gnu.org/licenses/>. */ 19 20 #ifndef HAVE_MACHINE_MODES 21 #define HAVE_MACHINE_MODES 22 23 /* Make an enum class that gives all the machine modes. */ 24 #include "insn-modes.h" 25 26 /* Get the name of mode MODE as a string. */ 27 28 extern const char * const mode_name[NUM_MACHINE_MODES]; 29 #define GET_MODE_NAME(MODE) mode_name[MODE] 30 31 /* Mode classes. */ 32 33 #include "mode-classes.def" 34 #define DEF_MODE_CLASS(M) M 35 enum mode_class { MODE_CLASSES, MAX_MODE_CLASS }; 36 #undef DEF_MODE_CLASS 37 #undef MODE_CLASSES 38 39 /* Get the general kind of object that mode MODE represents 40 (integer, floating, complex, etc.) */ 41 42 extern const unsigned char mode_class[NUM_MACHINE_MODES]; 43 #define GET_MODE_CLASS(MODE) ((enum mode_class) mode_class[MODE]) 44 45 /* Nonzero if MODE is an integral mode. */ 46 #define INTEGRAL_MODE_P(MODE) \ 47 (GET_MODE_CLASS (MODE) == MODE_INT \ 48 || GET_MODE_CLASS (MODE) == MODE_PARTIAL_INT \ 49 || GET_MODE_CLASS (MODE) == MODE_COMPLEX_INT \ 50 || GET_MODE_CLASS (MODE) == MODE_VECTOR_INT) 51 52 /* Nonzero if MODE is a floating-point mode. */ 53 #define FLOAT_MODE_P(MODE) \ 54 (GET_MODE_CLASS (MODE) == MODE_FLOAT \ 55 || GET_MODE_CLASS (MODE) == MODE_DECIMAL_FLOAT \ 56 || GET_MODE_CLASS (MODE) == MODE_COMPLEX_FLOAT \ 57 || GET_MODE_CLASS (MODE) == MODE_VECTOR_FLOAT) 58 59 /* Nonzero if MODE is a complex mode. */ 60 #define COMPLEX_MODE_P(MODE) \ 61 (GET_MODE_CLASS (MODE) == MODE_COMPLEX_INT \ 62 || GET_MODE_CLASS (MODE) == MODE_COMPLEX_FLOAT) 63 64 /* Nonzero if MODE is a vector mode. */ 65 #define VECTOR_MODE_P(MODE) \ 66 (GET_MODE_CLASS (MODE) == MODE_VECTOR_INT \ 67 || GET_MODE_CLASS (MODE) == MODE_VECTOR_FLOAT \ 68 || GET_MODE_CLASS (MODE) == MODE_VECTOR_FRACT \ 69 || GET_MODE_CLASS (MODE) == MODE_VECTOR_UFRACT \ 70 || GET_MODE_CLASS (MODE) == MODE_VECTOR_ACCUM \ 71 || GET_MODE_CLASS (MODE) == MODE_VECTOR_UACCUM) 72 73 /* Nonzero if MODE is a scalar integral mode. */ 74 #define SCALAR_INT_MODE_P(MODE) \ 75 (GET_MODE_CLASS (MODE) == MODE_INT \ 76 || GET_MODE_CLASS (MODE) == MODE_PARTIAL_INT) 77 78 /* Nonzero if MODE is a scalar floating point mode. */ 79 #define SCALAR_FLOAT_MODE_P(MODE) \ 80 (GET_MODE_CLASS (MODE) == MODE_FLOAT \ 81 || GET_MODE_CLASS (MODE) == MODE_DECIMAL_FLOAT) 82 83 /* Nonzero if MODE is a decimal floating point mode. */ 84 #define DECIMAL_FLOAT_MODE_P(MODE) \ 85 (GET_MODE_CLASS (MODE) == MODE_DECIMAL_FLOAT) 86 87 /* Nonzero if MODE is a scalar fract mode. */ 88 #define SCALAR_FRACT_MODE_P(MODE) \ 89 (GET_MODE_CLASS (MODE) == MODE_FRACT) 90 91 /* Nonzero if MODE is a scalar ufract mode. */ 92 #define SCALAR_UFRACT_MODE_P(MODE) \ 93 (GET_MODE_CLASS (MODE) == MODE_UFRACT) 94 95 /* Nonzero if MODE is a scalar fract or ufract mode. */ 96 #define ALL_SCALAR_FRACT_MODE_P(MODE) \ 97 (SCALAR_FRACT_MODE_P (MODE) || SCALAR_UFRACT_MODE_P (MODE)) 98 99 /* Nonzero if MODE is a scalar accum mode. */ 100 #define SCALAR_ACCUM_MODE_P(MODE) \ 101 (GET_MODE_CLASS (MODE) == MODE_ACCUM) 102 103 /* Nonzero if MODE is a scalar uaccum mode. */ 104 #define SCALAR_UACCUM_MODE_P(MODE) \ 105 (GET_MODE_CLASS (MODE) == MODE_UACCUM) 106 107 /* Nonzero if MODE is a scalar accum or uaccum mode. */ 108 #define ALL_SCALAR_ACCUM_MODE_P(MODE) \ 109 (SCALAR_ACCUM_MODE_P (MODE) || SCALAR_UACCUM_MODE_P (MODE)) 110 111 /* Nonzero if MODE is a scalar fract or accum mode. */ 112 #define SIGNED_SCALAR_FIXED_POINT_MODE_P(MODE) \ 113 (SCALAR_FRACT_MODE_P (MODE) || SCALAR_ACCUM_MODE_P (MODE)) 114 115 /* Nonzero if MODE is a scalar ufract or uaccum mode. */ 116 #define UNSIGNED_SCALAR_FIXED_POINT_MODE_P(MODE) \ 117 (SCALAR_UFRACT_MODE_P (MODE) || SCALAR_UACCUM_MODE_P (MODE)) 118 119 /* Nonzero if MODE is a scalar fract, ufract, accum or uaccum mode. */ 120 #define ALL_SCALAR_FIXED_POINT_MODE_P(MODE) \ 121 (SIGNED_SCALAR_FIXED_POINT_MODE_P (MODE) \ 122 || UNSIGNED_SCALAR_FIXED_POINT_MODE_P (MODE)) 123 124 /* Nonzero if MODE is a scalar/vector fract mode. */ 125 #define FRACT_MODE_P(MODE) \ 126 (GET_MODE_CLASS (MODE) == MODE_FRACT \ 127 || GET_MODE_CLASS (MODE) == MODE_VECTOR_FRACT) 128 129 /* Nonzero if MODE is a scalar/vector ufract mode. */ 130 #define UFRACT_MODE_P(MODE) \ 131 (GET_MODE_CLASS (MODE) == MODE_UFRACT \ 132 || GET_MODE_CLASS (MODE) == MODE_VECTOR_UFRACT) 133 134 /* Nonzero if MODE is a scalar/vector fract or ufract mode. */ 135 #define ALL_FRACT_MODE_P(MODE) \ 136 (FRACT_MODE_P (MODE) || UFRACT_MODE_P (MODE)) 137 138 /* Nonzero if MODE is a scalar/vector accum mode. */ 139 #define ACCUM_MODE_P(MODE) \ 140 (GET_MODE_CLASS (MODE) == MODE_ACCUM \ 141 || GET_MODE_CLASS (MODE) == MODE_VECTOR_ACCUM) 142 143 /* Nonzero if MODE is a scalar/vector uaccum mode. */ 144 #define UACCUM_MODE_P(MODE) \ 145 (GET_MODE_CLASS (MODE) == MODE_UACCUM \ 146 || GET_MODE_CLASS (MODE) == MODE_VECTOR_UACCUM) 147 148 /* Nonzero if MODE is a scalar/vector accum or uaccum mode. */ 149 #define ALL_ACCUM_MODE_P(MODE) \ 150 (ACCUM_MODE_P (MODE) || UACCUM_MODE_P (MODE)) 151 152 /* Nonzero if MODE is a scalar/vector fract or accum mode. */ 153 #define SIGNED_FIXED_POINT_MODE_P(MODE) \ 154 (FRACT_MODE_P (MODE) || ACCUM_MODE_P (MODE)) 155 156 /* Nonzero if MODE is a scalar/vector ufract or uaccum mode. */ 157 #define UNSIGNED_FIXED_POINT_MODE_P(MODE) \ 158 (UFRACT_MODE_P (MODE) || UACCUM_MODE_P (MODE)) 159 160 /* Nonzero if MODE is a scalar/vector fract, ufract, accum or uaccum mode. */ 161 #define ALL_FIXED_POINT_MODE_P(MODE) \ 162 (SIGNED_FIXED_POINT_MODE_P (MODE) \ 163 || UNSIGNED_FIXED_POINT_MODE_P (MODE)) 164 165 /* Nonzero if CLASS modes can be widened. */ 166 #define CLASS_HAS_WIDER_MODES_P(CLASS) \ 167 (CLASS == MODE_INT \ 168 || CLASS == MODE_PARTIAL_INT \ 169 || CLASS == MODE_FLOAT \ 170 || CLASS == MODE_DECIMAL_FLOAT \ 171 || CLASS == MODE_COMPLEX_FLOAT \ 172 || CLASS == MODE_FRACT \ 173 || CLASS == MODE_UFRACT \ 174 || CLASS == MODE_ACCUM \ 175 || CLASS == MODE_UACCUM) 176 177 /* Get the size in bytes and bits of an object of mode MODE. */ 178 179 extern CONST_MODE_SIZE unsigned char mode_size[NUM_MACHINE_MODES]; 180 #define GET_MODE_SIZE(MODE) ((unsigned short) mode_size[MODE]) 181 #define GET_MODE_BITSIZE(MODE) \ 182 ((unsigned short) (GET_MODE_SIZE (MODE) * BITS_PER_UNIT)) 183 184 /* Get the number of value bits of an object of mode MODE. */ 185 extern const unsigned short mode_precision[NUM_MACHINE_MODES]; 186 #define GET_MODE_PRECISION(MODE) mode_precision[MODE] 187 188 /* Get the number of integral bits of an object of mode MODE. */ 189 extern CONST_MODE_IBIT unsigned char mode_ibit[NUM_MACHINE_MODES]; 190 #define GET_MODE_IBIT(MODE) mode_ibit[MODE] 191 192 /* Get the number of fractional bits of an object of mode MODE. */ 193 extern CONST_MODE_FBIT unsigned char mode_fbit[NUM_MACHINE_MODES]; 194 #define GET_MODE_FBIT(MODE) mode_fbit[MODE] 195 196 /* Get a bitmask containing 1 for all bits in a word 197 that fit within mode MODE. */ 198 199 extern const unsigned HOST_WIDE_INT mode_mask_array[NUM_MACHINE_MODES]; 200 201 #define GET_MODE_MASK(MODE) mode_mask_array[MODE] 202 203 /* Return the mode of the inner elements in a vector. */ 204 205 extern const unsigned char mode_inner[NUM_MACHINE_MODES]; 206 #define GET_MODE_INNER(MODE) ((enum machine_mode) mode_inner[MODE]) 207 208 /* Get the size in bytes or bites of the basic parts of an 209 object of mode MODE. */ 210 211 #define GET_MODE_UNIT_SIZE(MODE) \ 212 (GET_MODE_INNER (MODE) == VOIDmode \ 213 ? GET_MODE_SIZE (MODE) \ 214 : GET_MODE_SIZE (GET_MODE_INNER (MODE))) 215 216 #define GET_MODE_UNIT_BITSIZE(MODE) \ 217 ((unsigned short) (GET_MODE_UNIT_SIZE (MODE) * BITS_PER_UNIT)) 218 219 #define GET_MODE_UNIT_PRECISION(MODE) \ 220 (GET_MODE_INNER (MODE) == VOIDmode \ 221 ? GET_MODE_PRECISION (MODE) \ 222 : GET_MODE_PRECISION (GET_MODE_INNER (MODE))) 223 224 /* Get the number of units in the object. */ 225 226 extern const unsigned char mode_nunits[NUM_MACHINE_MODES]; 227 #define GET_MODE_NUNITS(MODE) mode_nunits[MODE] 228 229 /* Get the next wider natural mode (eg, QI -> HI -> SI -> DI -> TI). */ 230 231 extern const unsigned char mode_wider[NUM_MACHINE_MODES]; 232 #define GET_MODE_WIDER_MODE(MODE) ((enum machine_mode) mode_wider[MODE]) 233 234 /* For scalars, this is a mode with twice the precision. For vectors, 235 this is a mode with the same inner mode but with twice the elements. */ 236 extern const unsigned char mode_2xwider[NUM_MACHINE_MODES]; 237 #define GET_MODE_2XWIDER_MODE(MODE) ((enum machine_mode) mode_2xwider[MODE]) 238 239 /* Return the mode for data of a given size SIZE and mode class CLASS. 240 If LIMIT is nonzero, then don't use modes bigger than MAX_FIXED_MODE_SIZE. 241 The value is BLKmode if no other mode is found. */ 242 243 extern enum machine_mode mode_for_size (unsigned int, enum mode_class, int); 244 245 /* Similar, but find the smallest mode for a given width. */ 246 247 extern enum machine_mode smallest_mode_for_size (unsigned int, 248 enum mode_class); 249 250 251 /* Return an integer mode of the exact same size as the input mode, 252 or BLKmode on failure. */ 253 254 extern enum machine_mode int_mode_for_mode (enum machine_mode); 255 256 /* Return a mode that is suitable for representing a vector, 257 or BLKmode on failure. */ 258 259 extern enum machine_mode mode_for_vector (enum machine_mode, unsigned); 260 261 /* A class for iterating through possible bitfield modes. */ 262 class bit_field_mode_iterator 263 { 264 public: 265 bit_field_mode_iterator (HOST_WIDE_INT, HOST_WIDE_INT, 266 HOST_WIDE_INT, HOST_WIDE_INT, 267 unsigned int, bool); 268 bool next_mode (enum machine_mode *); 269 bool prefer_smaller_modes (); 270 271 private: 272 enum machine_mode mode_; 273 /* We use signed values here because the bit position can be negative 274 for invalid input such as gcc.dg/pr48335-8.c. */ 275 HOST_WIDE_INT bitsize_; 276 HOST_WIDE_INT bitpos_; 277 HOST_WIDE_INT bitregion_start_; 278 HOST_WIDE_INT bitregion_end_; 279 unsigned int align_; 280 bool volatilep_; 281 int count_; 282 }; 283 284 /* Find the best mode to use to access a bit field. */ 285 286 extern enum machine_mode get_best_mode (int, int, 287 unsigned HOST_WIDE_INT, 288 unsigned HOST_WIDE_INT, 289 unsigned int, 290 enum machine_mode, bool); 291 292 /* Determine alignment, 1<=result<=BIGGEST_ALIGNMENT. */ 293 294 extern CONST_MODE_BASE_ALIGN unsigned char mode_base_align[NUM_MACHINE_MODES]; 295 296 extern unsigned get_mode_alignment (enum machine_mode); 297 298 #define GET_MODE_ALIGNMENT(MODE) get_mode_alignment (MODE) 299 300 /* For each class, get the narrowest mode in that class. */ 301 302 extern const unsigned char class_narrowest_mode[MAX_MODE_CLASS]; 303 #define GET_CLASS_NARROWEST_MODE(CLASS) \ 304 ((enum machine_mode) class_narrowest_mode[CLASS]) 305 306 /* Define the integer modes whose sizes are BITS_PER_UNIT and BITS_PER_WORD 307 and the mode whose class is Pmode and whose size is POINTER_SIZE. */ 308 309 extern enum machine_mode byte_mode; 310 extern enum machine_mode word_mode; 311 extern enum machine_mode ptr_mode; 312 313 /* Target-dependent machine mode initialization - in insn-modes.c. */ 314 extern void init_adjust_machine_modes (void); 315 316 #define TRULY_NOOP_TRUNCATION_MODES_P(MODE1, MODE2) \ 317 TRULY_NOOP_TRUNCATION (GET_MODE_PRECISION (MODE1), \ 318 GET_MODE_PRECISION (MODE2)) 319 320 #define HWI_COMPUTABLE_MODE_P(MODE) \ 321 (SCALAR_INT_MODE_P (MODE) \ 322 && GET_MODE_PRECISION (MODE) <= HOST_BITS_PER_WIDE_INT) 323 324 #endif /* not HAVE_MACHINE_MODES */ 325