src/gallium/auxiliary/util/u_linkage.h

   1 /**************************************************************************
   2  *
   3  * Copyright 2010 Luca Barbieri
   4  *
   5  * Permission is hereby granted, free of charge, to any person obtaining
   6  * a copy of this software and associated documentation files (the
   7  * "Software"), to deal in the Software without restriction, including
   8  * without limitation the rights to use, copy, modify, merge, publish,
   9  * distribute, sublicense, and/or sell copies of the Software, and to
  10  * permit persons to whom the Software is furnished to do so, subject to
  11  * the following conditions:
  12  *
  13  * The above copyright notice and this permission notice (including the
  14  * next paragraph) shall be included in all copies or substantial
  15  * portions of the Software.
  16  *
  17  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  18  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  19  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
  20  * IN NO EVENT SHALL THE COPYRIGHT OWNER(S) AND/OR ITS SUPPLIERS BE
  21  * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  22  * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  23  * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  24  *
  25  **************************************************************************/
  26
  27 #ifndef U_LINKAGE_H_
  28 #define U_LINKAGE_H_
  29
  30 #include "pipe/p_compiler.h"
  31 #include "pipe/p_shader_tokens.h"
  32
  33 struct util_semantic_set
  34 {
  35    unsigned long masks[256 / 8 / sizeof(unsigned long)];
  36 };
  37
  38 static INLINE boolean
  39 util_semantic_set_contains(struct util_semantic_set *set, unsigned char value)
  40 {
  41    return !!(set->masks[value / (sizeof(long) * 8)] & (1 << (value / (sizeof(long) * 8))));
  42 }
  43
  44 unsigned util_semantic_set_from_program_file(struct util_semantic_set *set, const struct tgsi_token *tokens, enum tgsi_file_type file);
  45
  46 /* efficient_slots is the number of slots such that hardware performance is
  47  * the same for using that amount, with holes, or less slots but with less
  48  * holes.
  49  *
  50  * num_slots is the size of the layout array and hardware limit instead.
  51  *
  52  * efficient_slots == 0 or efficient_solts == num_slots are typical settings.
  53  */
  54 void util_semantic_layout_from_set(unsigned char *layout, const struct util_semantic_set *set, unsigned efficient_slots, unsigned num_slots);
  55
  56 static INLINE void
  57 util_semantic_table_from_layout(unsigned char *table, unsigned char *layout, unsigned char first_slot_value, unsigned char num_slots)
  58 {
  59    int i;
  60    memset(table, 0xff, sizeof(table));
  61
  62    for(i = 0; i < num_slots; ++i)
  63       table[layout[i]] = first_slot_value + i;
  64 }
  65
  66 #endif /* U_LINKAGE_H_ */