gcc/internal-fn.def

   1 /* Internal functions.
   2    Copyright (C) 2011-2017 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 /* This file specifies a list of internal "functions".  These functions
  21    differ from built-in functions in that they have no linkage and cannot
  22    be called directly by the user.  They represent operations that are only
  23    synthesised by GCC itself.
  24
  25    Internal functions are used instead of tree codes if the operation
  26    and its operands are more naturally represented as a GIMPLE_CALL
  27    than a GIMPLE_ASSIGN.
  28
  29    Each entry in this file has one of the forms:
  30
  31      DEF_INTERNAL_FN (NAME, FLAGS, FNSPEC)
  32      DEF_INTERNAL_OPTAB_FN (NAME, FLAGS, OPTAB, TYPE)
  33      DEF_INTERNAL_SIGNED_OPTAB_FN (NAME, FLAGS, SELECTOR, SIGNED_OPTAB,
  34                                    UNSIGNED_OPTAB, TYPE)
  35      DEF_INTERNAL_FLT_FN (NAME, FLAGS, OPTAB, TYPE)
  36      DEF_INTERNAL_INT_FN (NAME, FLAGS, OPTAB, TYPE)
  37
  38    where NAME is the name of the function, FLAGS is a set of
  39    ECF_* flags and FNSPEC is a string describing functions fnspec.
  40
  41    DEF_INTERNAL_OPTAB_FN defines an internal function that maps to a
  42    direct optab.  The function should only be called with a given
  43    set of types if the associated optab is available for the modes
  44    of those types.  OPTAB says what optab to use (without the trailing
  45    "_optab") and TYPE categorizes the optab based on its inputs and
  46    outputs.  The possible types of optab are:
  47
  48    - mask_load: currently just maskload
  49    - load_lanes: currently just vec_load_lanes
  50
  51    - mask_store: currently just maskstore
  52    - store_lanes: currently just vec_store_lanes
  53
  54    DEF_INTERNAL_SIGNED_OPTAB_FN defines an internal function that
  55    maps to one of two optabs, depending on the signedness of an input.
  56    SIGNED_OPTAB and UNSIGNED_OPTAB are the optabs for signed and
  57    unsigned inputs respectively, both without the trailing "_optab".
  58    SELECTOR says which type in the tree_pair determines the signedness.
  59
  60    DEF_INTERNAL_FLT_FN is like DEF_INTERNAL_OPTAB_FN, but in addition,
  61    the function implements the computational part of a built-in math
  62    function BUILT_IN_<NAME>{F,,L}.  Unlike some built-in functions,
  63    these internal functions never set errno.
  64
  65    DEF_INTERNAL_INT_FN is like DEF_INTERNAL_OPTAB_FN, but in addition
  66    says that the function extends the C-level BUILT_IN_<NAME>{,L,LL,IMAX}
  67    group of functions to any integral mode (including vector modes).
  68
  69    Each entry must have a corresponding expander of the form:
  70
  71      void expand_NAME (gimple_call stmt)
  72
  73    where STMT is the statement that performs the call.  These are generated
  74    automatically for optab functions and call out to a function or macro
  75    called expand_<TYPE>_optab_fn.  */
  76
  77 #ifndef DEF_INTERNAL_FN
  78 #define DEF_INTERNAL_FN(CODE, FLAGS, FNSPEC)
  79 #endif
  80
  81 #ifndef DEF_INTERNAL_OPTAB_FN
  82 #define DEF_INTERNAL_OPTAB_FN(NAME, FLAGS, OPTAB, TYPE) \
  83   DEF_INTERNAL_FN (NAME, FLAGS | ECF_LEAF, NULL)
  84 #endif
  85
  86 #ifndef DEF_INTERNAL_SIGNED_OPTAB_FN
  87 #define DEF_INTERNAL_SIGNED_OPTAB_FN(NAME, FLAGS, SELECTOR, SIGNED_OPTAB, \
  88                                      UNSIGNED_OPTAB, TYPE) \
  89   DEF_INTERNAL_FN (NAME, FLAGS | ECF_LEAF, NULL)
  90 #endif
  91
  92 #ifndef DEF_INTERNAL_FLT_FN
  93 #define DEF_INTERNAL_FLT_FN(NAME, FLAGS, OPTAB, TYPE) \
  94   DEF_INTERNAL_OPTAB_FN (NAME, FLAGS, OPTAB, TYPE)
  95 #endif
  96
  97 #ifndef DEF_INTERNAL_FLT_FLOATN_FN
  98 #define DEF_INTERNAL_FLT_FLOATN_FN(NAME, FLAGS, OPTAB, TYPE) \
  99   DEF_INTERNAL_FLT_FN (NAME, FLAGS, OPTAB, TYPE)
 100 #endif
 101
 102 #ifndef DEF_INTERNAL_INT_FN
 103 #define DEF_INTERNAL_INT_FN(NAME, FLAGS, OPTAB, TYPE) \
 104   DEF_INTERNAL_OPTAB_FN (NAME, FLAGS, OPTAB, TYPE)
 105 #endif
 106
 107 DEF_INTERNAL_OPTAB_FN (MASK_LOAD, ECF_PURE, maskload, mask_load)
 108 DEF_INTERNAL_OPTAB_FN (LOAD_LANES, ECF_CONST, vec_load_lanes, load_lanes)
 109
 110 DEF_INTERNAL_OPTAB_FN (MASK_STORE, 0, maskstore, mask_store)
 111 DEF_INTERNAL_OPTAB_FN (STORE_LANES, ECF_CONST, vec_store_lanes, store_lanes)
 112
 113 DEF_INTERNAL_OPTAB_FN (RSQRT, ECF_CONST, rsqrt, unary)
 114
 115 DEF_INTERNAL_OPTAB_FN (REDUC_PLUS, ECF_CONST | ECF_NOTHROW,
 116                        reduc_plus_scal, unary)
 117 DEF_INTERNAL_SIGNED_OPTAB_FN (REDUC_MAX, ECF_CONST | ECF_NOTHROW, first,
 118                               reduc_smax_scal, reduc_umax_scal, unary)
 119 DEF_INTERNAL_SIGNED_OPTAB_FN (REDUC_MIN, ECF_CONST | ECF_NOTHROW, first,
 120                               reduc_smin_scal, reduc_umin_scal, unary)
 121
 122 /* Unary math functions.  */
 123 DEF_INTERNAL_FLT_FN (ACOS, ECF_CONST, acos, unary)
 124 DEF_INTERNAL_FLT_FN (ASIN, ECF_CONST, asin, unary)
 125 DEF_INTERNAL_FLT_FN (ATAN, ECF_CONST, atan, unary)
 126 DEF_INTERNAL_FLT_FN (COS, ECF_CONST, cos, unary)
 127 DEF_INTERNAL_FLT_FN (EXP, ECF_CONST, exp, unary)
 128 DEF_INTERNAL_FLT_FN (EXP10, ECF_CONST, exp10, unary)
 129 DEF_INTERNAL_FLT_FN (EXP2, ECF_CONST, exp2, unary)
 130 DEF_INTERNAL_FLT_FN (EXPM1, ECF_CONST, expm1, unary)
 131 DEF_INTERNAL_FLT_FN (LOG, ECF_CONST, log, unary)
 132 DEF_INTERNAL_FLT_FN (LOG10, ECF_CONST, log10, unary)
 133 DEF_INTERNAL_FLT_FN (LOG1P, ECF_CONST, log1p, unary)
 134 DEF_INTERNAL_FLT_FN (LOG2, ECF_CONST, log2, unary)
 135 DEF_INTERNAL_FLT_FN (LOGB, ECF_CONST, logb, unary)
 136 DEF_INTERNAL_FLT_FN (SIGNIFICAND, ECF_CONST, significand, unary)
 137 DEF_INTERNAL_FLT_FN (SIN, ECF_CONST, sin, unary)
 138 DEF_INTERNAL_FLT_FLOATN_FN (SQRT, ECF_CONST, sqrt, unary)
 139 DEF_INTERNAL_FLT_FN (TAN, ECF_CONST, tan, unary)
 140
 141 /* FP rounding.  */
 142 DEF_INTERNAL_FLT_FN (CEIL, ECF_CONST, ceil, unary)
 143 DEF_INTERNAL_FLT_FN (FLOOR, ECF_CONST, floor, unary)
 144 DEF_INTERNAL_FLT_FN (NEARBYINT, ECF_CONST, nearbyint, unary)
 145 DEF_INTERNAL_FLT_FN (RINT, ECF_CONST, rint, unary)
 146 DEF_INTERNAL_FLT_FN (ROUND, ECF_CONST, round, unary)
 147 DEF_INTERNAL_FLT_FN (TRUNC, ECF_CONST, btrunc, unary)
 148
 149 /* Binary math functions.  */
 150 DEF_INTERNAL_FLT_FN (ATAN2, ECF_CONST, atan2, binary)
 151 DEF_INTERNAL_FLT_FLOATN_FN (COPYSIGN, ECF_CONST, copysign, binary)
 152 DEF_INTERNAL_FLT_FN (FMOD, ECF_CONST, fmod, binary)
 153 DEF_INTERNAL_FLT_FN (POW, ECF_CONST, pow, binary)
 154 DEF_INTERNAL_FLT_FN (REMAINDER, ECF_CONST, remainder, binary)
 155 DEF_INTERNAL_FLT_FN (SCALB, ECF_CONST, scalb, binary)
 156 DEF_INTERNAL_FLT_FLOATN_FN (FMIN, ECF_CONST, fmin, binary)
 157 DEF_INTERNAL_FLT_FLOATN_FN (FMAX, ECF_CONST, fmax, binary)
 158 DEF_INTERNAL_OPTAB_FN (XORSIGN, ECF_CONST, xorsign, binary)
 159
 160 /* FP scales.  */
 161 DEF_INTERNAL_FLT_FN (LDEXP, ECF_CONST, ldexp, binary)
 162
 163 /* Unary integer ops.  */
 164 DEF_INTERNAL_INT_FN (CLRSB, ECF_CONST | ECF_NOTHROW, clrsb, unary)
 165 DEF_INTERNAL_INT_FN (CLZ, ECF_CONST | ECF_NOTHROW, clz, unary)
 166 DEF_INTERNAL_INT_FN (CTZ, ECF_CONST | ECF_NOTHROW, ctz, unary)
 167 DEF_INTERNAL_INT_FN (FFS, ECF_CONST | ECF_NOTHROW, ffs, unary)
 168 DEF_INTERNAL_INT_FN (PARITY, ECF_CONST | ECF_NOTHROW, parity, unary)
 169 DEF_INTERNAL_INT_FN (POPCOUNT, ECF_CONST | ECF_NOTHROW, popcount, unary)
 170
 171 DEF_INTERNAL_FN (GOMP_USE_SIMT, ECF_NOVOPS | ECF_LEAF | ECF_NOTHROW, NULL)
 172 DEF_INTERNAL_FN (GOMP_SIMT_ENTER, ECF_LEAF | ECF_NOTHROW, NULL)
 173 DEF_INTERNAL_FN (GOMP_SIMT_ENTER_ALLOC, ECF_LEAF | ECF_NOTHROW, NULL)
 174 DEF_INTERNAL_FN (GOMP_SIMT_EXIT, ECF_LEAF | ECF_NOTHROW, NULL)
 175 DEF_INTERNAL_FN (GOMP_SIMT_LANE, ECF_NOVOPS | ECF_LEAF | ECF_NOTHROW, NULL)
 176 DEF_INTERNAL_FN (GOMP_SIMT_VF, ECF_NOVOPS | ECF_LEAF | ECF_NOTHROW, NULL)
 177 DEF_INTERNAL_FN (GOMP_SIMT_LAST_LANE, ECF_NOVOPS | ECF_LEAF | ECF_NOTHROW, NULL)
 178 DEF_INTERNAL_FN (GOMP_SIMT_ORDERED_PRED, ECF_LEAF | ECF_NOTHROW, NULL)
 179 DEF_INTERNAL_FN (GOMP_SIMT_VOTE_ANY, ECF_NOVOPS | ECF_LEAF | ECF_NOTHROW, NULL)
 180 DEF_INTERNAL_FN (GOMP_SIMT_XCHG_BFLY, ECF_NOVOPS | ECF_LEAF | ECF_NOTHROW, NULL)
 181 DEF_INTERNAL_FN (GOMP_SIMT_XCHG_IDX, ECF_NOVOPS | ECF_LEAF | ECF_NOTHROW, NULL)
 182 DEF_INTERNAL_FN (GOMP_SIMD_LANE, ECF_NOVOPS | ECF_LEAF | ECF_NOTHROW, NULL)
 183 DEF_INTERNAL_FN (GOMP_SIMD_VF, ECF_CONST | ECF_LEAF | ECF_NOTHROW, NULL)
 184 DEF_INTERNAL_FN (GOMP_SIMD_LAST_LANE, ECF_CONST | ECF_LEAF | ECF_NOTHROW, NULL)
 185 DEF_INTERNAL_FN (GOMP_SIMD_ORDERED_START, ECF_LEAF | ECF_NOTHROW, NULL)
 186 DEF_INTERNAL_FN (GOMP_SIMD_ORDERED_END, ECF_LEAF | ECF_NOTHROW, NULL)
 187 DEF_INTERNAL_FN (LOOP_VECTORIZED, ECF_NOVOPS | ECF_LEAF | ECF_NOTHROW, NULL)
 188 DEF_INTERNAL_FN (LOOP_DIST_ALIAS, ECF_NOVOPS | ECF_LEAF | ECF_NOTHROW, NULL)
 189 DEF_INTERNAL_FN (ANNOTATE,  ECF_CONST | ECF_LEAF | ECF_NOTHROW, NULL)
 190 DEF_INTERNAL_FN (UBSAN_NULL, ECF_LEAF | ECF_NOTHROW, ".R.")
 191 DEF_INTERNAL_FN (UBSAN_BOUNDS, ECF_LEAF | ECF_NOTHROW, NULL)
 192 DEF_INTERNAL_FN (UBSAN_VPTR, ECF_LEAF | ECF_NOTHROW, ".RR..")
 193 DEF_INTERNAL_FN (UBSAN_CHECK_ADD, ECF_CONST | ECF_LEAF | ECF_NOTHROW, NULL)
 194 DEF_INTERNAL_FN (UBSAN_CHECK_SUB, ECF_CONST | ECF_LEAF | ECF_NOTHROW, NULL)
 195 DEF_INTERNAL_FN (UBSAN_CHECK_MUL, ECF_CONST | ECF_LEAF | ECF_NOTHROW, NULL)
 196 DEF_INTERNAL_FN (UBSAN_PTR, ECF_LEAF | ECF_NOTHROW, ".R.")
 197 DEF_INTERNAL_FN (UBSAN_OBJECT_SIZE, ECF_LEAF | ECF_NOTHROW, NULL)
 198 DEF_INTERNAL_FN (ABNORMAL_DISPATCHER, ECF_NORETURN, NULL)
 199 DEF_INTERNAL_FN (BUILTIN_EXPECT, ECF_CONST | ECF_LEAF | ECF_NOTHROW, NULL)
 200 DEF_INTERNAL_FN (ASAN_CHECK, ECF_TM_PURE | ECF_LEAF | ECF_NOTHROW, ".R...")
 201 DEF_INTERNAL_FN (ASAN_MARK, ECF_LEAF | ECF_NOTHROW, ".R..")
 202 DEF_INTERNAL_FN (ASAN_POISON, ECF_LEAF | ECF_NOTHROW | ECF_NOVOPS, NULL)
 203 DEF_INTERNAL_FN (ASAN_POISON_USE, ECF_LEAF | ECF_NOTHROW | ECF_NOVOPS, NULL)
 204 DEF_INTERNAL_FN (ADD_OVERFLOW, ECF_CONST | ECF_LEAF | ECF_NOTHROW, NULL)
 205 DEF_INTERNAL_FN (SUB_OVERFLOW, ECF_CONST | ECF_LEAF | ECF_NOTHROW, NULL)
 206 DEF_INTERNAL_FN (MUL_OVERFLOW, ECF_CONST | ECF_LEAF | ECF_NOTHROW, NULL)
 207 DEF_INTERNAL_FN (TSAN_FUNC_EXIT, ECF_NOVOPS | ECF_LEAF | ECF_NOTHROW, NULL)
 208 DEF_INTERNAL_FN (VA_ARG, ECF_NOTHROW | ECF_LEAF, NULL)
 209
 210 /* An unduplicable, uncombinable function.  Generally used to preserve
 211    a CFG property in the face of jump threading, tail merging or
 212    other such optimizations.  The first argument distinguishes
 213    between uses.  See internal-fn.h for usage.  */
 214 DEF_INTERNAL_FN (UNIQUE, ECF_NOTHROW, NULL)
 215 DEF_INTERNAL_FN (PHI, 0, NULL)
 216
 217 /* DIM_SIZE and DIM_POS return the size of a particular compute
 218    dimension and the executing thread's position within that
 219    dimension.  DIM_POS is pure (and not const) so that it isn't
 220    thought to clobber memory and can be gcse'd within a single
 221    parallel region, but not across FORK/JOIN boundaries.  They take a
 222    single INTEGER_CST argument.  This might be overly conservative.  */
 223 DEF_INTERNAL_FN (GOACC_DIM_SIZE, ECF_CONST | ECF_NOTHROW | ECF_LEAF, ".")
 224 DEF_INTERNAL_FN (GOACC_DIM_POS, ECF_PURE | ECF_NOTHROW | ECF_LEAF, ".")
 225
 226 /* OpenACC looping abstraction.  See internal-fn.h for usage.  */
 227 DEF_INTERNAL_FN (GOACC_LOOP, ECF_PURE | ECF_NOTHROW, NULL)
 228
 229 /* OpenACC reduction abstraction.  See internal-fn.h  for usage.  */
 230 DEF_INTERNAL_FN (GOACC_REDUCTION, ECF_NOTHROW | ECF_LEAF, NULL)
 231
 232 /* Openacc tile abstraction. Describes the spans of the element loop.
 233    GOACC_TILE (num-loops, loop-no, tile-arg, tile-mask, element-mask).  */
 234 DEF_INTERNAL_FN (GOACC_TILE, ECF_NOTHROW | ECF_LEAF, NULL)
 235
 236 /* Set errno to EDOM, if GCC knows how to do that directly for the
 237    current target.  */
 238 DEF_INTERNAL_FN (SET_EDOM, ECF_LEAF | ECF_NOTHROW, NULL)
 239
 240 /* Atomic functions.  These don't have ECF_NOTHROW because for
 241    -fnon-call-exceptions they can throw, otherwise we set
 242    gimple_call_nothrow_p on it.  */
 243 DEF_INTERNAL_FN (ATOMIC_BIT_TEST_AND_SET, ECF_LEAF, NULL)
 244 DEF_INTERNAL_FN (ATOMIC_BIT_TEST_AND_COMPLEMENT, ECF_LEAF, NULL)
 245 DEF_INTERNAL_FN (ATOMIC_BIT_TEST_AND_RESET, ECF_LEAF, NULL)
 246 DEF_INTERNAL_FN (ATOMIC_COMPARE_EXCHANGE, ECF_LEAF, NULL)
 247
 248 /* To implement [[fallthrough]].  */
 249 DEF_INTERNAL_FN (FALLTHROUGH, ECF_LEAF | ECF_NOTHROW, NULL)
 250
 251 /* To implement __builtin_launder.  */
 252 DEF_INTERNAL_FN (LAUNDER, ECF_LEAF | ECF_NOTHROW | ECF_NOVOPS, NULL)
 253
 254 /* Divmod function.  */
 255 DEF_INTERNAL_FN (DIVMOD, ECF_CONST | ECF_LEAF, NULL)
 256
 257 /* A NOP function with arbitrary arguments and return value.  */
 258 DEF_INTERNAL_FN (NOP, ECF_CONST | ECF_LEAF | ECF_NOTHROW, NULL)
 259
 260 #undef DEF_INTERNAL_INT_FN
 261 #undef DEF_INTERNAL_FLT_FN
 262 #undef DEF_INTERNAL_FLT_FLOATN_FN
 263 #undef DEF_INTERNAL_SIGNED_OPTAB_FN
 264 #undef DEF_INTERNAL_OPTAB_FN
 265 #undef DEF_INTERNAL_FN