src/compiler/nir/nir_schedule.h

   1 /*
   2  * Copyright © 2014 Connor Abbott
   3  *
   4  * Permission is hereby granted, free of charge, to any person obtaining a
   5  * copy of this software and associated documentation files (the "Software"),
   6  * to deal in the Software without restriction, including without limitation
   7  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
   8  * and/or sell copies of the Software, and to permit persons to whom the
   9  * Software is furnished to do so, subject to the following conditions:
  10  *
  11  * The above copyright notice and this permission notice (including the next
  12  * paragraph) shall be included in all copies or substantial portions of the
  13  * Software.
  14  *
  15  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  16  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  17  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  18  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  19  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
  20  * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
  21  * IN THE SOFTWARE.
  22  */
  23
  24 #ifndef NIR_SCHEDULE_H
  25 #define NIR_SCHEDULE_H
  26
  27 #include "nir.h"
  28
  29 #ifdef __cplusplus
  30 extern "C" {
  31 #endif
  32
  33 typedef struct nir_schedule_options {
  34    /* On some hardware with some stages the inputs and outputs to the shader
  35     * share the same memory. In that case the scheduler needs to ensure that
  36     * all output writes are scheduled after all of the input writes to avoid
  37     * overwriting them. This is a bitmask of stages that need that.
  38     */
  39    unsigned stages_with_shared_io_memory;
  40    /* The approximate amount of register pressure at which point the scheduler
  41     * will try to reduce register usage.
  42     */
  43    int threshold;
  44 } nir_schedule_options;
  45
  46 void nir_schedule(nir_shader *shader, const nir_schedule_options *options);
  47
  48 #ifdef __cplusplus
  49 } /* extern "C" */
  50 #endif
  51
  52 #endif /* NIR_SCHEDULE_H */