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spirv_extensions: define spirv_extensions_supported

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Add a struct to maintain which SPIR-V extensions are supported, and an
utility method to initialize it based on
nir_spirv_supported_capabilities.

v2:
  * Fixing code style (Ian Romanick)
  * Adding a prefix (spirv) to fill_supported_spirv_extensions (Ian Romanick)

v3: rebase update (nir_spirv_supported_extensions renamed)

v4: include AMD_gcn_shader support

v5: move spirv_fill_supported_spirv_extensions to
    src/mesa/main/spirv_extensions.c

Signed-off-by: Alejandro Piñeiro <apinheiro@igalia.com>
Signed-off-by: Arcady Goldmints-Orlov <agoldmints@igalia.com>

Reviewed-by: Caio Marcelo de Oliveira Filho <caio.oliveira@intel.com>
This commit is contained in:
Alejandro Piñeiro 2019-06-19 13:58:30 -05:00
parent 06e5daf575
commit f6da2a5508
2 changed files with 43 additions and 0 deletions
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32
src/mesa/main/spirv_extensions.c
View file

@ -26,6 +26,7 @@
* \brief SPIRV-V extension handling. See ARB_spirv_extensions
*/
#include <stdbool.h>
#include "spirv_extensions.h"
GLuint
@ -62,3 +63,34 @@ _mesa_spirv_extensions_to_string(enum SpvExtension ext)
return "unknown";
}
/**
* Sets the supported flags for known SPIR-V extensions based on the
* capabilites supported (spirv capabilities based on the spirv to nir
* support).
*
* One could argue that makes more sense in the other way around, as from the
* spec pov capabilities are enable for a given extension. But from our pov,
* we support or not (depending on the driver) some given capability, and
* spirv_to_nir check for capabilities not extensions. Also we usually fill
* first the supported capabilities, that are not always related to an
* extension.
*/
void
_mesa_fill_supported_spirv_extensions(struct spirv_supported_extensions *ext,
const struct spirv_supported_capabilities *cap)
{
memset(ext->supported, 0, sizeof(ext->supported));
ext->count = 0;
ext->supported[SPV_KHR_shader_draw_parameters] = cap->draw_parameters;
ext->supported[SPV_KHR_multiview] = cap->multiview;
ext->supported[SPV_KHR_variable_pointers] = cap->variable_pointers;
ext->supported[SPV_AMD_gcn_shader] = cap->amd_gcn_shader;
for (unsigned i = 0; i < SPV_EXTENSIONS_COUNT; i++) {
if (ext->supported[i])
ext->count++;
}
}

11
src/mesa/main/spirv_extensions.h
View file

@ -48,6 +48,14 @@ enum SpvExtension {
SPV_EXTENSIONS_COUNT
};
struct spirv_supported_extensions {
/** Flags the supported extensions. Array to make it easier to iterate. */
bool supported[SPV_EXTENSIONS_COUNT];
/** Number of supported extensions */
unsigned int count;
};
extern GLuint
_mesa_get_spirv_extension_count(struct gl_context *ctx);
@ -57,6 +65,9 @@ _mesa_get_enabled_spirv_extension(struct gl_context *ctx,
const char *_mesa_spirv_extensions_to_string(enum SpvExtension ext);
void _mesa_fill_supported_spirv_extensions(struct spirv_supported_extensions *ext,
const struct spirv_supported_capabilities *cap);
#ifdef __cplusplus
}
#endif