src/mesa/main/spirv_extensions.c

   1 /*
   2  * Copyright © 2017 Intel Corporation
   3  *
   4  * Permission is hereby granted, free of charge, to any person obtaining a
   5  * copy of this software and associated documentation files (the "Software"),
   6  * to deal in the Software without restriction, including without limitation
   7  * on the rights to use, copy, modify, merge, publish, distribute, sub
   8  * license, and/or sell copies of the Software, and to permit persons to whom
   9  * the Software is furnished to do so, subject to the following conditions:
  10  *
  11  * The above copyright notice and this permission notice (including the next
  12  * paragraph) shall be included in all copies or substantial portions of the
  13  * Software.
  14  *
  15  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  16  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  17  * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
  18  * THE AUTHOR(S) AND/OR THEIR SUPPLIERS BE LIABLE FOR ANY CLAIM,
  19  * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
  20  * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
  21  * USE OR OTHER DEALINGS IN THE SOFTWARE.
  22  */
  23
  24 /**
  25  * \file
  26  * \brief SPIRV-V extension handling. See ARB_spirv_extensions
  27  */
  28
  29 #include <stdbool.h>
  30 #include "spirv_extensions.h"
  31
  32 GLuint
  33 _mesa_get_spirv_extension_count(struct gl_context *ctx)
  34 {
  35    return 0;
  36 }
  37
  38 const GLubyte *
  39 _mesa_get_enabled_spirv_extension(struct gl_context *ctx,
  40                                   GLuint index)
  41 {
  42    return (const GLubyte *) 0;
  43 }
  44
  45 const char *
  46 _mesa_spirv_extensions_to_string(enum SpvExtension ext)
  47 {
  48 #define STR(x) case x: return #x;
  49    switch (ext) {
  50    STR(SPV_KHR_16bit_storage);
  51    STR(SPV_KHR_device_group);
  52    STR(SPV_KHR_multiview);
  53    STR(SPV_KHR_shader_ballot);
  54    STR(SPV_KHR_shader_draw_parameters);
  55    STR(SPV_KHR_storage_buffer_storage_class);
  56    STR(SPV_KHR_subgroup_vote);
  57    STR(SPV_KHR_variable_pointers);
  58    STR(SPV_AMD_gcn_shader);
  59    case SPV_EXTENSIONS_COUNT:
  60       unreachable("Unknown SPIR-V extension");
  61    }
  62 #undef STR
  63
  64    return "unknown";
  65 }
  66
  67 /**
  68  * Sets the supported flags for known SPIR-V extensions based on the
  69  * capabilites supported (spirv capabilities based on the spirv to nir
  70  * support).
  71  *
  72  * One could argue that makes more sense in the other way around, as from the
  73  * spec pov capabilities are enable for a given extension. But from our pov,
  74  * we support or not (depending on the driver) some given capability, and
  75  * spirv_to_nir check for capabilities not extensions. Also we usually fill
  76  * first the supported capabilities, that are not always related to an
  77  * extension.
  78  */
  79 void
  80 _mesa_fill_supported_spirv_extensions(struct spirv_supported_extensions *ext,
  81                                       const struct spirv_supported_capabilities *cap)
  82 {
  83    memset(ext->supported, 0, sizeof(ext->supported));
  84
  85    ext->count = 0;
  86
  87    ext->supported[SPV_KHR_shader_draw_parameters] = cap->draw_parameters;
  88    ext->supported[SPV_KHR_multiview] = cap->multiview;
  89    ext->supported[SPV_KHR_variable_pointers] = cap->variable_pointers;
  90    ext->supported[SPV_AMD_gcn_shader] = cap->amd_gcn_shader;
  91
  92    for (unsigned i = 0; i < SPV_EXTENSIONS_COUNT; i++) {
  93       if (ext->supported[i])
  94          ext->count++;
  95    }
  96 }