tcg/tcg-mo.h

   1 /*
   2  * Tiny Code Generator for QEMU
   3  *
   4  * Copyright (c) 2008 Fabrice Bellard
   5  *
   6  * Permission is hereby granted, free of charge, to any person obtaining a copy
   7  * of this software and associated documentation files (the "Software"), to deal
   8  * in the Software without restriction, including without limitation the rights
   9  * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
  10  * copies of the Software, and to permit persons to whom the Software is
  11  * furnished to do so, subject to the following conditions:
  12  *
  13  * The above copyright notice and this permission notice shall be included in
  14  * all copies or substantial portions of the Software.
  15  *
  16  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  17  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  18  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
  19  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  20  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  21  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
  22  * THE SOFTWARE.
  23  */
  24
  25 #ifndef TCG_MO_H
  26 #define TCG_MO_H
  27
  28 typedef enum {
  29     /* Used to indicate the type of accesses on which ordering
  30        is to be ensured.  Modeled after SPARC barriers.
  31
  32        This is of the form TCG_MO_A_B where A is before B in program order.
  33     */
  34     TCG_MO_LD_LD  = 0x01,
  35     TCG_MO_ST_LD  = 0x02,
  36     TCG_MO_LD_ST  = 0x04,
  37     TCG_MO_ST_ST  = 0x08,
  38     TCG_MO_ALL    = 0x0F,  /* OR of the above */
  39
  40     /* Used to indicate the kind of ordering which is to be ensured by the
  41        instruction.  These types are derived from x86/aarch64 instructions.
  42        It should be noted that these are different from C11 semantics.  */
  43     TCG_BAR_LDAQ  = 0x10,  /* Following ops will not come forward */
  44     TCG_BAR_STRL  = 0x20,  /* Previous ops will not be delayed */
  45     TCG_BAR_SC    = 0x30,  /* No ops cross barrier; OR of the above */
  46 } TCGBar;
  47
  48 #endif /* TCG_MO_H */