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  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_slots == 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, size_t table_size, unsigned char *layout,
  58.                                 unsigned char first_slot_value, unsigned char num_slots)
  59. {
  60.    unsigned char i;
  61.    memset(table, 0xff, table_size);
  62.  
  63.    for(i = 0; i < num_slots; ++i)
  64.       table[layout[i]] = first_slot_value + i;
  65. }
  66.  
  67. #endif /* U_LINKAGE_H_ */
  68.