include/tcg/tcg-mo.h

/*
 * Tiny Code Generator for QEMU
 *
 * Copyright (c) 2008 Fabrice Bellard
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 */

#ifndef TCG_MO_H
#define TCG_MO_H

typedef enum {
    /* Used to indicate the type of accesses on which ordering
       is to be ensured.  Modeled after SPARC barriers.

       This is of the form TCG_MO_A_B where A is before B in program order.
    */
    TCG_MO_LD_LD  = 0x01,
    TCG_MO_ST_LD  = 0x02,
    TCG_MO_LD_ST  = 0x04,
    TCG_MO_ST_ST  = 0x08,
    TCG_MO_ALL    = 0x0F,  /* OR of the above */

    /* Used to indicate the kind of ordering which is to be ensured by the
       instruction.  These types are derived from x86/aarch64 instructions.
       It should be noted that these are different from C11 semantics.  */
    TCG_BAR_LDAQ  = 0x10,  /* Following ops will not come forward */
    TCG_BAR_STRL  = 0x20,  /* Previous ops will not be delayed */
    TCG_BAR_SC    = 0x30,  /* No ops cross barrier; OR of the above */
} TCGBar;

#endif /* TCG_MO_H */