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
_mesa_get_spirv_extension_count(struct gl_context * ctx)33 _mesa_get_spirv_extension_count(struct gl_context *ctx)
34 {
35 if (ctx->Const.SpirVExtensions == NULL)
36 return 0;
37
38 return ctx->Const.SpirVExtensions->count;
39 }
40
41 const GLubyte *
_mesa_get_enabled_spirv_extension(struct gl_context * ctx,GLuint index)42 _mesa_get_enabled_spirv_extension(struct gl_context *ctx,
43 GLuint index)
44 {
45 unsigned int n = 0;
46
47 if (ctx->Const.SpirVExtensions == NULL)
48 return (const GLubyte *) 0;
49
50 for (unsigned int i = 0; i < SPV_EXTENSIONS_COUNT; i++) {
51 if (ctx->Const.SpirVExtensions->supported[i]) {
52 if (n == index)
53 return (const GLubyte *) _mesa_spirv_extensions_to_string(i);
54 else
55 n++;
56 }
57 }
58
59 return (const GLubyte *) 0;
60 }
61
62 const char *
_mesa_spirv_extensions_to_string(enum SpvExtension ext)63 _mesa_spirv_extensions_to_string(enum SpvExtension ext)
64 {
65 #define STR(x) case x: return #x;
66 switch (ext) {
67 STR(SPV_KHR_16bit_storage);
68 STR(SPV_KHR_device_group);
69 STR(SPV_KHR_multiview);
70 STR(SPV_KHR_shader_ballot);
71 STR(SPV_KHR_shader_draw_parameters);
72 STR(SPV_KHR_storage_buffer_storage_class);
73 STR(SPV_KHR_subgroup_vote);
74 STR(SPV_KHR_variable_pointers);
75 STR(SPV_AMD_gcn_shader);
76 case SPV_EXTENSIONS_COUNT:
77 unreachable("Unknown SPIR-V extension");
78 }
79 #undef STR
80
81 return "unknown";
82 }
83
84 /**
85 * Sets the supported flags for known SPIR-V extensions based on the
86 * capabilites supported (spirv capabilities based on the spirv to nir
87 * support).
88 *
89 * One could argue that makes more sense in the other way around, as from the
90 * spec pov capabilities are enable for a given extension. But from our pov,
91 * we support or not (depending on the driver) some given capability, and
92 * spirv_to_nir check for capabilities not extensions. Also we usually fill
93 * first the supported capabilities, that are not always related to an
94 * extension.
95 */
96 void
_mesa_fill_supported_spirv_extensions(struct spirv_supported_extensions * ext,const struct spirv_supported_capabilities * cap)97 _mesa_fill_supported_spirv_extensions(struct spirv_supported_extensions *ext,
98 const struct spirv_supported_capabilities *cap)
99 {
100 memset(ext->supported, 0, sizeof(ext->supported));
101
102 ext->count = 0;
103
104 ext->supported[SPV_KHR_shader_draw_parameters] = cap->draw_parameters;
105 ext->supported[SPV_KHR_multiview] = cap->multiview;
106 ext->supported[SPV_KHR_storage_buffer_storage_class] = true;
107 ext->supported[SPV_KHR_variable_pointers] = cap->variable_pointers;
108 ext->supported[SPV_AMD_gcn_shader] = cap->amd_gcn_shader;
109 ext->supported[SPV_KHR_shader_ballot] = cap->subgroup_ballot;
110 ext->supported[SPV_KHR_subgroup_vote] = cap->subgroup_vote;
111
112 for (unsigned i = 0; i < SPV_EXTENSIONS_COUNT; i++) {
113 if (ext->supported[i])
114 ext->count++;
115 }
116 }
117