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      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
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     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 /**
     55  * Maximum control flow nesting
     56  *
     57  * SM3.0 requires 24
     58  */
     59 #define LP_MAX_TGSI_NESTING 32
     60 
     61 /**
     62  * Maximum iterations before loop termination
     63  * Shared between every loop in a TGSI shader
     64  */
     65 #define LP_MAX_TGSI_LOOP_ITERATIONS 65535
     66 
     67 
     68 /**
     69  * Some of these limits are actually infinite (i.e., only limited by available
     70  * memory), however advertising INT_MAX would cause some test problems to
     71  * actually try to allocate the maximum and run out of memory and crash.  So
     72  * stick with something reasonable here.
     73  */
     74 static INLINE int
     75 gallivm_get_shader_param(enum pipe_shader_cap param)
     76 {
     77    switch(param) {
     78    case PIPE_SHADER_CAP_MAX_INSTRUCTIONS:
     79    case PIPE_SHADER_CAP_MAX_ALU_INSTRUCTIONS:
     80    case PIPE_SHADER_CAP_MAX_TEX_INSTRUCTIONS:
     81    case PIPE_SHADER_CAP_MAX_TEX_INDIRECTIONS:
     82       return 1 * 1024 * 1024;
     83    case PIPE_SHADER_CAP_MAX_CONTROL_FLOW_DEPTH:
     84       return LP_MAX_TGSI_NESTING;
     85    case PIPE_SHADER_CAP_MAX_INPUTS:
     86       return PIPE_MAX_SHADER_INPUTS;
     87    case PIPE_SHADER_CAP_MAX_CONSTS:
     88       return 16 * 2024;
     89    case PIPE_SHADER_CAP_MAX_CONST_BUFFERS:
     90       return PIPE_MAX_CONSTANT_BUFFERS;
     91    case PIPE_SHADER_CAP_MAX_TEMPS:
     92       return LP_MAX_TGSI_TEMPS;
     93    case PIPE_SHADER_CAP_MAX_ADDRS:
     94       return LP_MAX_TGSI_ADDRS;
     95    case PIPE_SHADER_CAP_MAX_PREDS:
     96       return LP_MAX_TGSI_PREDS;
     97    case PIPE_SHADER_CAP_TGSI_CONT_SUPPORTED:
     98       return 1;
     99    case PIPE_SHADER_CAP_INDIRECT_INPUT_ADDR:
    100    case PIPE_SHADER_CAP_INDIRECT_OUTPUT_ADDR:
    101    case PIPE_SHADER_CAP_INDIRECT_TEMP_ADDR:
    102    case PIPE_SHADER_CAP_INDIRECT_CONST_ADDR:
    103       return 1;
    104    case PIPE_SHADER_CAP_SUBROUTINES:
    105       return 1;
    106    case PIPE_SHADER_CAP_INTEGERS:
    107       return 1;
    108    case PIPE_SHADER_CAP_MAX_TEXTURE_SAMPLERS:
    109       return PIPE_MAX_SAMPLERS;
    110    default:
    111       return 0;
    112    }
    113 }
    114 
    115 
    116 #endif /* LP_BLD_LIMITS_H_ */
    117