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/*
* Copyright 2017 Advanced Micro Devices, Inc.
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* on the rights to use, copy, modify, merge, publish, distribute, sub
* license, and/or sell copies of the Software, and to permit persons to whom
* the Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice (including the next
* paragraph) shall be included in all copies or substantial portions of the
* Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
* THE AUTHOR(S) AND/OR THEIR SUPPLIERS BE LIABLE FOR ANY CLAIM,
* DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
* OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
* USE OR OTHER DEALINGS IN THE SOFTWARE.
*/
#ifndef AC_SHADER_ABI_H
#define AC_SHADER_ABI_H
#include <llvm-c/Core.h>
enum ac_descriptor_type {
AC_DESC_IMAGE,
AC_DESC_FMASK,
AC_DESC_SAMPLER,
AC_DESC_BUFFER,
};
/* Document the shader ABI during compilation. This is what allows radeonsi and
* radv to share a compiler backend.
*/
struct ac_shader_abi {
LLVMValueRef base_vertex;
LLVMValueRef start_instance;
LLVMValueRef draw_id;
LLVMValueRef vertex_id;
LLVMValueRef instance_id;
LLVMValueRef gs_prim_id;
LLVMValueRef gs_invocation_id;
LLVMValueRef frag_pos[4];
LLVMValueRef front_face;
LLVMValueRef ancillary;
LLVMValueRef sample_coverage;
/* For VS and PS: pre-loaded shader inputs.
*
* Currently only used for NIR shaders; indexed by variables'
* driver_location.
*/
LLVMValueRef *inputs;
void (*emit_outputs)(struct ac_shader_abi *abi,
unsigned max_outputs,
LLVMValueRef *addrs);
void (*emit_vertex)(struct ac_shader_abi *abi,
unsigned stream,
LLVMValueRef *addrs);
LLVMValueRef (*load_ubo)(struct ac_shader_abi *abi, LLVMValueRef index);
/**
* Load the descriptor for the given buffer.
*
* \param buffer the buffer as presented in NIR: this is the descriptor
* in Vulkan, and the buffer index in OpenGL/Gallium
* \param write whether buffer contents will be written
*/
LLVMValueRef (*load_ssbo)(struct ac_shader_abi *abi,
LLVMValueRef buffer, bool write);
/**
* Load a descriptor associated to a sampler.
*
* \param descriptor_set the descriptor set index (only for Vulkan)
* \param base_index the base index of the sampler variable
* \param constant_index constant part of an array index (or 0, if the
* sampler variable is not an array)
* \param index non-constant part of an array index (may be NULL)
* \param desc_type the type of descriptor to load
* \param image whether the descriptor is loaded for an image operation
*/
LLVMValueRef (*load_sampler_desc)(struct ac_shader_abi *abi,
unsigned descriptor_set,
unsigned base_index,
unsigned constant_index,
LLVMValueRef index,
enum ac_descriptor_type desc_type,
bool image, bool write);
/* Whether to clamp the shadow reference value to [0,1]on VI. Radeonsi currently
* uses it due to promoting D16 to D32, but radv needs it off. */
bool clamp_shadow_reference;
};
#endif /* AC_SHADER_ABI_H */
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