src/gallium/auxiliary/gallivm/lp_bld_limits.h

   1 /**************************************************************************
   2  *
   3  * Copyright 2010-2012 VMware, Inc.
   4  * All Rights Reserved.
   5  *
   6  * Permission is hereby granted, free of charge, to any person obtaining a
   7  * copy of this software and associated documentation files (the
   8  * "Software"), to deal in the Software without restriction, including
   9  * without limitation the rights to use, copy, modify, merge, publish,
  10  * distribute, sub license, and/or sell copies of the Software, and to
  11  * permit persons to whom the Software is furnished to do so, subject to
  12  * the following conditions:
  13  *
  14  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  15  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  16  * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
  17  * THE COPYRIGHT HOLDERS, AUTHORS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM,
  18  * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
  19  * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
  20  * USE OR OTHER DEALINGS IN THE SOFTWARE.
  21  *
  22  * The above copyright notice and this permission notice (including the
  23  * next paragraph) shall be included in all copies or substantial portions
  24  * of the Software.
  25  *
  26  **************************************************************************/
  27
  28
  29 #ifndef LP_BLD_LIMITS_H_
  30 #define LP_BLD_LIMITS_H_
  31
  32
  33 #include <limits.h>
  34
  35 #include "pipe/p_state.h"
  36 #include "pipe/p_defines.h"
  37
  38
  39 /*
  40  * TGSI translation limits.
  41  *
  42  * Some are slightly above SM 3.0 requirements to give some wiggle room to
  43  * the state trackers.
  44  */
  45
  46 #define LP_MAX_TGSI_TEMPS 256
  47
  48 #define LP_MAX_TGSI_ADDRS 16
  49
  50 #define LP_MAX_TGSI_IMMEDIATES 256
  51
  52 #define LP_MAX_TGSI_PREDS 16
  53
  54 #define LP_MAX_TGSI_CONST_BUFFERS 16
  55
  56
  57 /**
  58  * Maximum control flow nesting
  59  *
  60  * SM3.0 requires 24
  61  */
  62 #define LP_MAX_TGSI_NESTING 32
  63
  64 /**
  65  * Maximum iterations before loop termination
  66  * Shared between every loop in a TGSI shader
  67  */
  68 #define LP_MAX_TGSI_LOOP_ITERATIONS 65535
  69
  70
  71 /**
  72  * Some of these limits are actually infinite (i.e., only limited by available
  73  * memory), however advertising INT_MAX would cause some test problems to
  74  * actually try to allocate the maximum and run out of memory and crash.  So
  75  * stick with something reasonable here.
  76  */
  77 static INLINE int
  78 gallivm_get_shader_param(enum pipe_shader_cap param)
  79 {
  80    switch(param) {
  81    case PIPE_SHADER_CAP_MAX_INSTRUCTIONS:
  82    case PIPE_SHADER_CAP_MAX_ALU_INSTRUCTIONS:
  83    case PIPE_SHADER_CAP_MAX_TEX_INSTRUCTIONS:
  84    case PIPE_SHADER_CAP_MAX_TEX_INDIRECTIONS:
  85       return 1 * 1024 * 1024;
  86    case PIPE_SHADER_CAP_MAX_CONTROL_FLOW_DEPTH:
  87       return LP_MAX_TGSI_NESTING;
  88    case PIPE_SHADER_CAP_MAX_INPUTS:
  89       return PIPE_MAX_SHADER_INPUTS;
  90    case PIPE_SHADER_CAP_MAX_CONSTS:
  91       return 16 * 2024;
  92    case PIPE_SHADER_CAP_MAX_CONST_BUFFERS:
  93       return PIPE_MAX_CONSTANT_BUFFERS;
  94    case PIPE_SHADER_CAP_MAX_TEMPS:
  95       return LP_MAX_TGSI_TEMPS;
  96    case PIPE_SHADER_CAP_MAX_ADDRS:
  97       return LP_MAX_TGSI_ADDRS;
  98    case PIPE_SHADER_CAP_MAX_PREDS:
  99       return LP_MAX_TGSI_PREDS;
 100    case PIPE_SHADER_CAP_TGSI_CONT_SUPPORTED:
 101       return 1;
 102    case PIPE_SHADER_CAP_INDIRECT_INPUT_ADDR:
 103    case PIPE_SHADER_CAP_INDIRECT_OUTPUT_ADDR:
 104    case PIPE_SHADER_CAP_INDIRECT_TEMP_ADDR:
 105    case PIPE_SHADER_CAP_INDIRECT_CONST_ADDR:
 106       return 1;
 107    case PIPE_SHADER_CAP_SUBROUTINES:
 108       return 1;
 109    case PIPE_SHADER_CAP_INTEGERS:
 110       return 1;
 111    case PIPE_SHADER_CAP_MAX_TEXTURE_SAMPLERS:
 112       return PIPE_MAX_SAMPLERS;
 113    default:
 114       return 0;
 115    }
 116 }
 117
 118
 119 #endif /* LP_BLD_LIMITS_H_ */