include/gomp-constants.h

   1 /* Communication between GCC and libgomp.
   2
   3    Copyright (C) 2014-2020 Free Software Foundation, Inc.
   4
   5    Contributed by Mentor Embedded.
   6
   7    This file is part of the GNU Offloading and Multi Processing Library
   8    (libgomp).
   9
  10    Libgomp is free software; you can redistribute it and/or modify it
  11    under the terms of the GNU General Public License as published by
  12    the Free Software Foundation; either version 3, or (at your option)
  13    any later version.
  14
  15    Libgomp is distributed in the hope that it will be useful, but WITHOUT ANY
  16    WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
  17    FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  18    more details.
  19
  20    Under Section 7 of GPL version 3, you are granted additional
  21    permissions described in the GCC Runtime Library Exception, version
  22    3.1, as published by the Free Software Foundation.
  23
  24    You should have received a copy of the GNU General Public License and
  25    a copy of the GCC Runtime Library Exception along with this program;
  26    see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
  27    <http://www.gnu.org/licenses/>.  */
  28
  29 #ifndef GOMP_CONSTANTS_H
  30 #define GOMP_CONSTANTS_H 1
  31
  32 /* Memory mapping types.  */
  33
  34 /* One byte.  */
  35 #define GOMP_MAP_LAST                   (1 << 8)
  36
  37 #define GOMP_MAP_FLAG_TO                (1 << 0)
  38 #define GOMP_MAP_FLAG_FROM              (1 << 1)
  39 /* Special map kinds, enumerated starting here.  */
  40 #define GOMP_MAP_FLAG_SPECIAL_0         (1 << 2)
  41 #define GOMP_MAP_FLAG_SPECIAL_1         (1 << 3)
  42 #define GOMP_MAP_FLAG_SPECIAL_2         (1 << 4)
  43 #define GOMP_MAP_FLAG_SPECIAL_4         (1 << 6)
  44 #define GOMP_MAP_FLAG_SPECIAL           (GOMP_MAP_FLAG_SPECIAL_1 \
  45                                          | GOMP_MAP_FLAG_SPECIAL_0)
  46 #define GOMP_MAP_DEEP_COPY              (GOMP_MAP_FLAG_SPECIAL_4 \
  47                                          | GOMP_MAP_FLAG_SPECIAL_2)
  48 /* Flag to force a specific behavior (or else, trigger a run-time error).  */
  49 #define GOMP_MAP_FLAG_FORCE             (1 << 7)
  50
  51 enum gomp_map_kind
  52   {
  53     /* If not already present, allocate.  */
  54     GOMP_MAP_ALLOC =                    0,
  55     /* ..., and copy to device.  */
  56     GOMP_MAP_TO =                       (GOMP_MAP_ALLOC | GOMP_MAP_FLAG_TO),
  57     /* ..., and copy from device.  */
  58     GOMP_MAP_FROM =                     (GOMP_MAP_ALLOC | GOMP_MAP_FLAG_FROM),
  59     /* ..., and copy to and from device.  */
  60     GOMP_MAP_TOFROM =                   (GOMP_MAP_TO | GOMP_MAP_FROM),
  61     /* The following kind is an internal only map kind, used for pointer based
  62        array sections.  OMP_CLAUSE_SIZE for these is not the pointer size,
  63        which is implicitly POINTER_SIZE_UNITS, but the bias.  */
  64     GOMP_MAP_POINTER =                  (GOMP_MAP_FLAG_SPECIAL_0 | 0),
  65     /* Also internal, behaves like GOMP_MAP_TO, but additionally any
  66        GOMP_MAP_POINTER records consecutive after it which have addresses
  67        falling into that range will not be ignored if GOMP_MAP_TO_PSET wasn't
  68        mapped already.
  69        For OpenACC attach operations (e.g. copyin of struct members),
  70        GOMP_MAP_TO_PSET is followed by a single GOMP_MAP_ATTACH mapping
  71        instead.  */
  72     GOMP_MAP_TO_PSET =                  (GOMP_MAP_FLAG_SPECIAL_0 | 1),
  73     /* Must already be present.  */
  74     GOMP_MAP_FORCE_PRESENT =            (GOMP_MAP_FLAG_SPECIAL_0 | 2),
  75     /* Deallocate a mapping, without copying from device.  */
  76     GOMP_MAP_DELETE =                   (GOMP_MAP_FLAG_SPECIAL_0 | 3),
  77     /* Is a device pointer.  OMP_CLAUSE_SIZE for these is unused; is implicitly
  78        POINTER_SIZE_UNITS.  */
  79     GOMP_MAP_FORCE_DEVICEPTR =          (GOMP_MAP_FLAG_SPECIAL_1 | 0),
  80     /* OpenACC device_resident.  */
  81     GOMP_MAP_DEVICE_RESIDENT =          (GOMP_MAP_FLAG_SPECIAL_1 | 1),
  82     /* OpenACC link.  */
  83     GOMP_MAP_LINK =                     (GOMP_MAP_FLAG_SPECIAL_1 | 2),
  84     /* Use device data if present, fall back to host address otherwise.  */
  85     GOMP_MAP_IF_PRESENT =               (GOMP_MAP_FLAG_SPECIAL_1 | 3),
  86     /* Do not map, copy bits for firstprivate instead.  */
  87     GOMP_MAP_FIRSTPRIVATE =             (GOMP_MAP_FLAG_SPECIAL | 0),
  88     /* Similarly, but store the value in the pointer rather than
  89        pointed by the pointer.  */
  90     GOMP_MAP_FIRSTPRIVATE_INT =         (GOMP_MAP_FLAG_SPECIAL | 1),
  91     /* Pointer translate host address into device address and copy that
  92        back to host.  */
  93     GOMP_MAP_USE_DEVICE_PTR =           (GOMP_MAP_FLAG_SPECIAL | 2),
  94     /* Allocate a zero length array section.  Prefer next non-zero length
  95        mapping over previous non-zero length mapping over zero length mapping
  96        at the address.  If not already mapped, do nothing (and pointer translate
  97        to NULL).  */
  98     GOMP_MAP_ZERO_LEN_ARRAY_SECTION =   (GOMP_MAP_FLAG_SPECIAL | 3),
  99     /* Allocate.  */
 100     GOMP_MAP_FORCE_ALLOC =              (GOMP_MAP_FLAG_FORCE | GOMP_MAP_ALLOC),
 101     /* ..., and copy to device.  */
 102     GOMP_MAP_FORCE_TO =                 (GOMP_MAP_FLAG_FORCE | GOMP_MAP_TO),
 103     /* ..., and copy from device.  */
 104     GOMP_MAP_FORCE_FROM =               (GOMP_MAP_FLAG_FORCE | GOMP_MAP_FROM),
 105     /* ..., and copy to and from device.  */
 106     GOMP_MAP_FORCE_TOFROM =             (GOMP_MAP_FLAG_FORCE | GOMP_MAP_TOFROM),
 107     /* Like GOMP_MAP_USE_DEVICE_PTR above, translate a host to a device
 108        address.  If translation fails because the target is not mapped,
 109        continue using the host address. */
 110     GOMP_MAP_USE_DEVICE_PTR_IF_PRESENT = (GOMP_MAP_FLAG_SPECIAL_2 | 0),
 111     /* If not already present, allocate.  And unconditionally copy to
 112        device.  */
 113     GOMP_MAP_ALWAYS_TO =                (GOMP_MAP_FLAG_SPECIAL_2 | GOMP_MAP_TO),
 114     /* If not already present, allocate.  And unconditionally copy from
 115        device.  */
 116     GOMP_MAP_ALWAYS_FROM =              (GOMP_MAP_FLAG_SPECIAL_2
 117                                          | GOMP_MAP_FROM),
 118     /* If not already present, allocate.  And unconditionally copy to and from
 119        device.  */
 120     GOMP_MAP_ALWAYS_TOFROM =            (GOMP_MAP_FLAG_SPECIAL_2
 121                                          | GOMP_MAP_TOFROM),
 122     /* Map a sparse struct; the address is the base of the structure, alignment
 123        it's required alignment, and size is the number of adjacent entries
 124        that belong to the struct.  The adjacent entries should be sorted by
 125        increasing address, so it is easy to determine lowest needed address
 126        (address of the first adjacent entry) and highest needed address
 127        (address of the last adjacent entry plus its size).  */
 128     GOMP_MAP_STRUCT =                   (GOMP_MAP_FLAG_SPECIAL_2
 129                                          | GOMP_MAP_FLAG_SPECIAL | 0),
 130     /* On a location of a pointer/reference that is assumed to be already mapped
 131        earlier, store the translated address of the preceeding mapping.
 132        No refcount is bumped by this, and the store is done unconditionally.  */
 133     GOMP_MAP_ALWAYS_POINTER =           (GOMP_MAP_FLAG_SPECIAL_2
 134                                          | GOMP_MAP_FLAG_SPECIAL | 1),
 135     /* Forced deallocation of zero length array section.  */
 136     GOMP_MAP_DELETE_ZERO_LEN_ARRAY_SECTION
 137       =                                 (GOMP_MAP_FLAG_SPECIAL_2
 138                                          | GOMP_MAP_FLAG_SPECIAL | 3),
 139     /* Decrement usage count and deallocate if zero.  */
 140     GOMP_MAP_RELEASE =                  (GOMP_MAP_FLAG_SPECIAL_2
 141                                          | GOMP_MAP_DELETE),
 142     /* The attach/detach mappings below use the OMP_CLAUSE_SIZE field as a
 143        bias.  This will typically be zero, except when mapping an array slice
 144        with a non-zero base.  In that case the bias will indicate the
 145        (positive) difference between the start of the actual mapped data and
 146        the "virtual" origin of the array.
 147        In OpenACC, attach a pointer to a mapped struct field.  */
 148     GOMP_MAP_ATTACH =                   (GOMP_MAP_DEEP_COPY | 0),
 149     /* In OpenACC, detach a pointer to a mapped struct field.  */
 150     GOMP_MAP_DETACH =                   (GOMP_MAP_DEEP_COPY | 1),
 151     /* In OpenACC, detach a pointer to a mapped struct field.  */
 152     GOMP_MAP_FORCE_DETACH =             (GOMP_MAP_DEEP_COPY
 153                                          | GOMP_MAP_FLAG_FORCE | 1),
 154
 155     /* Internal to GCC, not used in libgomp.  */
 156     /* Do not map, but pointer assign a pointer instead.  */
 157     GOMP_MAP_FIRSTPRIVATE_POINTER =     (GOMP_MAP_LAST | 1),
 158     /* Do not map, but pointer assign a reference instead.  */
 159     GOMP_MAP_FIRSTPRIVATE_REFERENCE =   (GOMP_MAP_LAST | 2),
 160     /* An attach or detach operation.  Rewritten to the appropriate type during
 161        gimplification, depending on directive (i.e. "enter data" or
 162        parallel/kernels region vs. "exit data").  */
 163     GOMP_MAP_ATTACH_DETACH =            (GOMP_MAP_LAST | 3)
 164   };
 165
 166 #define GOMP_MAP_COPY_TO_P(X) \
 167   (!((X) & GOMP_MAP_FLAG_SPECIAL) \
 168    && ((X) & GOMP_MAP_FLAG_TO))
 169
 170 #define GOMP_MAP_COPY_FROM_P(X) \
 171   (!((X) & GOMP_MAP_FLAG_SPECIAL) \
 172    && ((X) & GOMP_MAP_FLAG_FROM))
 173
 174 #define GOMP_MAP_POINTER_P(X) \
 175   ((X) == GOMP_MAP_POINTER)
 176
 177 #define GOMP_MAP_ALWAYS_TO_P(X) \
 178   (((X) == GOMP_MAP_ALWAYS_TO) || ((X) == GOMP_MAP_ALWAYS_TOFROM))
 179
 180 #define GOMP_MAP_ALWAYS_FROM_P(X) \
 181   (((X) == GOMP_MAP_ALWAYS_FROM) || ((X) == GOMP_MAP_ALWAYS_TOFROM))
 182
 183 #define GOMP_MAP_ALWAYS_P(X) \
 184   (GOMP_MAP_ALWAYS_TO_P (X) || ((X) == GOMP_MAP_ALWAYS_FROM))
 185
 186
 187 /* Asynchronous behavior.  Keep in sync with
 188    libgomp/{openacc.h,openacc.f90,openacc_lib.h}:acc_async_t.  */
 189
 190 #define GOMP_ASYNC_NOVAL                -1
 191 #define GOMP_ASYNC_SYNC                 -2
 192
 193
 194 /* Device codes.  Keep in sync with
 195    libgomp/{openacc.h,openacc.f90,openacc_lib.h}:acc_device_t as well as
 196    libgomp/libgomp-plugin.h.  */
 197 #define GOMP_DEVICE_NONE                0
 198 #define GOMP_DEVICE_DEFAULT             1
 199 #define GOMP_DEVICE_HOST                2
 200 /* #define GOMP_DEVICE_HOST_NONSHM      3 removed.  */
 201 #define GOMP_DEVICE_NOT_HOST            4
 202 #define GOMP_DEVICE_NVIDIA_PTX          5
 203 #define GOMP_DEVICE_INTEL_MIC           6
 204 #define GOMP_DEVICE_HSA                 7
 205 #define GOMP_DEVICE_GCN                 8
 206
 207 #define GOMP_DEVICE_ICV                 -1
 208 #define GOMP_DEVICE_HOST_FALLBACK       -2
 209
 210 /* GOMP_task/GOMP_taskloop* flags argument.  */
 211 #define GOMP_TASK_FLAG_UNTIED           (1 << 0)
 212 #define GOMP_TASK_FLAG_FINAL            (1 << 1)
 213 #define GOMP_TASK_FLAG_MERGEABLE        (1 << 2)
 214 #define GOMP_TASK_FLAG_DEPEND           (1 << 3)
 215 #define GOMP_TASK_FLAG_PRIORITY         (1 << 4)
 216 #define GOMP_TASK_FLAG_UP               (1 << 8)
 217 #define GOMP_TASK_FLAG_GRAINSIZE        (1 << 9)
 218 #define GOMP_TASK_FLAG_IF               (1 << 10)
 219 #define GOMP_TASK_FLAG_NOGROUP          (1 << 11)
 220 #define GOMP_TASK_FLAG_REDUCTION        (1 << 12)
 221
 222 /* GOMP_target{_ext,update_ext,enter_exit_data} flags argument.  */
 223 #define GOMP_TARGET_FLAG_NOWAIT         (1 << 0)
 224 #define GOMP_TARGET_FLAG_EXIT_DATA      (1 << 1)
 225 /* Internal to libgomp.  */
 226 #define GOMP_TARGET_FLAG_UPDATE         (1U << 31)
 227
 228
 229 /* OpenACC construct flags.  */
 230
 231 /* Force host fallback execution.  */
 232 #define GOACC_FLAG_HOST_FALLBACK        (1 << 0)
 233
 234 /* For legacy reasons, in the ABI, the GOACC_FLAGs are encoded as an inverted
 235    bitmask.  */
 236 #define GOACC_FLAGS_MARSHAL_OP          BIT_NOT_EXPR
 237 #define GOACC_FLAGS_UNMARSHAL(X)        (~(X))
 238
 239
 240 /* Versions of libgomp and device-specific plugins.  GOMP_VERSION
 241    should be incremented whenever an ABI-incompatible change is introduced
 242    to the plugin interface defined in libgomp/libgomp.h.  */
 243 #define GOMP_VERSION    1
 244 #define GOMP_VERSION_NVIDIA_PTX 1
 245 #define GOMP_VERSION_INTEL_MIC 0
 246 #define GOMP_VERSION_GCN 1
 247
 248 #define GOMP_VERSION_PACK(LIB, DEV) (((LIB) << 16) | (DEV))
 249 #define GOMP_VERSION_LIB(PACK) (((PACK) >> 16) & 0xffff)
 250 #define GOMP_VERSION_DEV(PACK) ((PACK) & 0xffff)
 251
 252 #define GOMP_DIM_GANG   0
 253 #define GOMP_DIM_WORKER 1
 254 #define GOMP_DIM_VECTOR 2
 255 #define GOMP_DIM_MAX    3
 256 #define GOMP_DIM_MASK(X) (1u << (X))
 257
 258 /* Varadic launch arguments.  End of list is marked by a zero.  */
 259 #define GOMP_LAUNCH_DIM         1  /* Launch dimensions, op = mask */
 260 #define GOMP_LAUNCH_ASYNC       2  /* Async, op = cst val if not MAX  */
 261 #define GOMP_LAUNCH_WAIT        3  /* Waits, op = num waits.  */
 262 #define GOMP_LAUNCH_CODE_SHIFT  28
 263 #define GOMP_LAUNCH_DEVICE_SHIFT 16
 264 #define GOMP_LAUNCH_OP_SHIFT 0
 265 #define GOMP_LAUNCH_PACK(CODE,DEVICE,OP)        \
 266   (((CODE) << GOMP_LAUNCH_CODE_SHIFT)           \
 267    | ((DEVICE) << GOMP_LAUNCH_DEVICE_SHIFT)     \
 268    | ((OP) << GOMP_LAUNCH_OP_SHIFT))
 269 #define GOMP_LAUNCH_CODE(X) (((X) >> GOMP_LAUNCH_CODE_SHIFT) & 0xf)
 270 #define GOMP_LAUNCH_DEVICE(X) (((X) >> GOMP_LAUNCH_DEVICE_SHIFT) & 0xfff)
 271 #define GOMP_LAUNCH_OP(X) (((X) >> GOMP_LAUNCH_OP_SHIFT) & 0xffff)
 272 #define GOMP_LAUNCH_OP_MAX 0xffff
 273
 274 /* Bitmask to apply in order to find out the intended device of a target
 275    argument.  */
 276 #define GOMP_TARGET_ARG_DEVICE_MASK             ((1 << 7) - 1)
 277 /* The target argument is significant for all devices.  */
 278 #define GOMP_TARGET_ARG_DEVICE_ALL              0
 279
 280 /* Flag set when the subsequent element in the device-specific argument
 281    values.  */
 282 #define GOMP_TARGET_ARG_SUBSEQUENT_PARAM        (1 << 7)
 283
 284 /* Bitmask to apply to a target argument to find out the value identifier.  */
 285 #define GOMP_TARGET_ARG_ID_MASK                 (((1 << 8) - 1) << 8)
 286 /* Target argument index of NUM_TEAMS.  */
 287 #define GOMP_TARGET_ARG_NUM_TEAMS               (1 << 8)
 288 /* Target argument index of THREAD_LIMIT.  */
 289 #define GOMP_TARGET_ARG_THREAD_LIMIT            (2 << 8)
 290
 291 /* If the value is directly embeded in target argument, it should be a 16-bit
 292    at most and shifted by this many bits.  */
 293 #define GOMP_TARGET_ARG_VALUE_SHIFT             16
 294
 295 /* Dependence types in omp_depend_t objects.  */
 296 #define GOMP_DEPEND_IN                  1
 297 #define GOMP_DEPEND_OUT                 2
 298 #define GOMP_DEPEND_INOUT               3
 299 #define GOMP_DEPEND_MUTEXINOUTSET       4
 300
 301 /* HSA specific data structures.  */
 302
 303 /* Identifiers of device-specific target arguments.  */
 304 #define GOMP_TARGET_ARG_HSA_KERNEL_ATTRIBUTES   (1 << 8)
 305
 306 #endif