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 4096
  51
  52 #define LP_MAX_TGSI_CONSTS 4096
  53
  54 #define LP_MAX_TGSI_CONST_BUFFERS 16
  55
  56 #define LP_MAX_TGSI_CONST_BUFFER_SIZE (LP_MAX_TGSI_CONSTS * sizeof(float[4]))
  57
  58 /*
  59  * For quick access we cache registers in statically
  60  * allocated arrays. Here we define the maximum size
  61  * for those arrays.
  62  */
  63 #define LP_MAX_INLINED_TEMPS 256
  64
  65 #define LP_MAX_INLINED_IMMEDIATES 256
  66
  67 /**
  68  * Maximum control flow nesting
  69  *
  70  * SM4.0 requires 64 (per subroutine actually, subroutine nesting itself is 32)
  71  * SM3.0 requires 24 (most likely per subroutine too)
  72  * add 2 more (some translation could add one more)
  73  */
  74 #define LP_MAX_TGSI_NESTING 66
  75
  76 /**
  77  * Maximum iterations before loop termination
  78  * Shared between every loop in a TGSI shader
  79  */
  80 #define LP_MAX_TGSI_LOOP_ITERATIONS 65535
  81
  82
  83 /**
  84  * Some of these limits are actually infinite (i.e., only limited by available
  85  * memory), however advertising INT_MAX would cause some test problems to
  86  * actually try to allocate the maximum and run out of memory and crash.  So
  87  * stick with something reasonable here.
  88  */
  89 static inline int
  90 gallivm_get_shader_param(enum pipe_shader_cap param)
  91 {
  92    switch(param) {
  93    case PIPE_SHADER_CAP_MAX_INSTRUCTIONS:
  94    case PIPE_SHADER_CAP_MAX_ALU_INSTRUCTIONS:
  95    case PIPE_SHADER_CAP_MAX_TEX_INSTRUCTIONS:
  96    case PIPE_SHADER_CAP_MAX_TEX_INDIRECTIONS:
  97       return 1 * 1024 * 1024;
  98    case PIPE_SHADER_CAP_MAX_CONTROL_FLOW_DEPTH:
  99       return LP_MAX_TGSI_NESTING;
 100    case PIPE_SHADER_CAP_MAX_INPUTS:
 101       return 32;
 102    case PIPE_SHADER_CAP_MAX_OUTPUTS:
 103       return 32;
 104    case PIPE_SHADER_CAP_MAX_CONST_BUFFER_SIZE:
 105       return LP_MAX_TGSI_CONST_BUFFER_SIZE;
 106    case PIPE_SHADER_CAP_MAX_CONST_BUFFERS:
 107       return PIPE_MAX_CONSTANT_BUFFERS;
 108    case PIPE_SHADER_CAP_MAX_TEMPS:
 109       return LP_MAX_TGSI_TEMPS;
 110    case PIPE_SHADER_CAP_TGSI_CONT_SUPPORTED:
 111       return 1;
 112    case PIPE_SHADER_CAP_INDIRECT_INPUT_ADDR:
 113    case PIPE_SHADER_CAP_INDIRECT_OUTPUT_ADDR:
 114    case PIPE_SHADER_CAP_INDIRECT_TEMP_ADDR:
 115    case PIPE_SHADER_CAP_INDIRECT_CONST_ADDR:
 116       return 1;
 117    case PIPE_SHADER_CAP_SUBROUTINES:
 118       return 1;
 119    case PIPE_SHADER_CAP_INTEGERS:
 120       return 1;
 121    case PIPE_SHADER_CAP_FP16:
 122       return 0;
 123    case PIPE_SHADER_CAP_MAX_TEXTURE_SAMPLERS:
 124       return PIPE_MAX_SAMPLERS;
 125    case PIPE_SHADER_CAP_MAX_SAMPLER_VIEWS:
 126       return PIPE_MAX_SHADER_SAMPLER_VIEWS;
 127    case PIPE_SHADER_CAP_PREFERRED_IR:
 128       return PIPE_SHADER_IR_TGSI;
 129    case PIPE_SHADER_CAP_SUPPORTED_IRS:
 130       return 1 << PIPE_SHADER_IR_TGSI;
 131    case PIPE_SHADER_CAP_TGSI_SQRT_SUPPORTED:
 132    case PIPE_SHADER_CAP_TGSI_ANY_INOUT_DECL_RANGE:
 133       return 1;
 134    case PIPE_SHADER_CAP_TGSI_DROUND_SUPPORTED:
 135    case PIPE_SHADER_CAP_TGSI_DFRACEXP_DLDEXP_SUPPORTED:
 136    case PIPE_SHADER_CAP_TGSI_FMA_SUPPORTED:
 137    case PIPE_SHADER_CAP_MAX_SHADER_BUFFERS:
 138    case PIPE_SHADER_CAP_MAX_SHADER_IMAGES:
 139    case PIPE_SHADER_CAP_LOWER_IF_THRESHOLD:
 140    case PIPE_SHADER_CAP_TGSI_SKIP_MERGE_REGISTERS:
 141       return 0;
 142    case PIPE_SHADER_CAP_MAX_UNROLL_ITERATIONS_HINT:
 143       return 32;
 144    }
 145    /* if we get here, we missed a shader cap above (and should have seen
 146     * a compiler warning.)
 147     */
 148    return 0;
 149 }
 150
 151
 152 #endif /* LP_BLD_LIMITS_H_ */