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 4096
  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  * For quick access we cache temps in a statically
  58  * allocated array. This defines the maximum size
  59  * of that array.
  60  */
  61 #define LP_MAX_INLINED_TEMPS 256
  62
  63 /**
  64  * Maximum control flow nesting
  65  *
  66  * SM4.0 requires 64 (per subroutine actually, subroutine nesting itself is 32)
  67  * SM3.0 requires 24 (most likely per subroutine too)
  68  * add 2 more (some translation could add one more)
  69  */
  70 #define LP_MAX_TGSI_NESTING 66
  71
  72 /**
  73  * Maximum iterations before loop termination
  74  * Shared between every loop in a TGSI shader
  75  */
  76 #define LP_MAX_TGSI_LOOP_ITERATIONS 65535
  77
  78
  79 /**
  80  * Some of these limits are actually infinite (i.e., only limited by available
  81  * memory), however advertising INT_MAX would cause some test problems to
  82  * actually try to allocate the maximum and run out of memory and crash.  So
  83  * stick with something reasonable here.
  84  */
  85 static INLINE int
  86 gallivm_get_shader_param(enum pipe_shader_cap param)
  87 {
  88    switch(param) {
  89    case PIPE_SHADER_CAP_MAX_INSTRUCTIONS:
  90    case PIPE_SHADER_CAP_MAX_ALU_INSTRUCTIONS:
  91    case PIPE_SHADER_CAP_MAX_TEX_INSTRUCTIONS:
  92    case PIPE_SHADER_CAP_MAX_TEX_INDIRECTIONS:
  93       return 1 * 1024 * 1024;
  94    case PIPE_SHADER_CAP_MAX_CONTROL_FLOW_DEPTH:
  95       return LP_MAX_TGSI_NESTING;
  96    case PIPE_SHADER_CAP_MAX_INPUTS:
  97       return PIPE_MAX_SHADER_INPUTS;
  98    case PIPE_SHADER_CAP_MAX_CONSTS:
  99       return 16 * 2024;
 100    case PIPE_SHADER_CAP_MAX_CONST_BUFFERS:
 101       return PIPE_MAX_CONSTANT_BUFFERS;
 102    case PIPE_SHADER_CAP_MAX_TEMPS:
 103       return LP_MAX_TGSI_TEMPS;
 104    case PIPE_SHADER_CAP_MAX_ADDRS:
 105       return LP_MAX_TGSI_ADDRS;
 106    case PIPE_SHADER_CAP_MAX_PREDS:
 107       return LP_MAX_TGSI_PREDS;
 108    case PIPE_SHADER_CAP_TGSI_CONT_SUPPORTED:
 109       return 1;
 110    case PIPE_SHADER_CAP_INDIRECT_INPUT_ADDR:
 111    case PIPE_SHADER_CAP_INDIRECT_OUTPUT_ADDR:
 112    case PIPE_SHADER_CAP_INDIRECT_TEMP_ADDR:
 113    case PIPE_SHADER_CAP_INDIRECT_CONST_ADDR:
 114       return 1;
 115    case PIPE_SHADER_CAP_SUBROUTINES:
 116       return 1;
 117    case PIPE_SHADER_CAP_INTEGERS:
 118       return 1;
 119    case PIPE_SHADER_CAP_MAX_TEXTURE_SAMPLERS:
 120       return PIPE_MAX_SAMPLERS;
 121    case PIPE_SHADER_CAP_MAX_SAMPLER_VIEWS:
 122       return PIPE_MAX_SHADER_SAMPLER_VIEWS;
 123    case PIPE_SHADER_CAP_TGSI_SQRT_SUPPORTED:
 124       return 1;
 125    default:
 126       return 0;
 127    }
 128 }
 129
 130
 131 #endif /* LP_BLD_LIMITS_H_ */