src/gallium/auxiliary/gallivm/lp_bld_limits.h

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  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_ */