1 /* 2 * Copyright 2017 Advanced Micro Devices, Inc. 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 #ifndef AC_SHADER_ABI_H 25 #define AC_SHADER_ABI_H 26 27 #include <llvm-c/Core.h> 28 29 struct nir_variable; 30 31 enum ac_descriptor_type { 32 AC_DESC_IMAGE, 33 AC_DESC_FMASK, 34 AC_DESC_SAMPLER, 35 AC_DESC_BUFFER, 36 }; 37 38 /* Document the shader ABI during compilation. This is what allows radeonsi and 39 * radv to share a compiler backend. 40 */ 41 struct ac_shader_abi { 42 LLVMValueRef base_vertex; 43 LLVMValueRef start_instance; 44 LLVMValueRef draw_id; 45 LLVMValueRef vertex_id; 46 LLVMValueRef instance_id; 47 LLVMValueRef tcs_patch_id; 48 LLVMValueRef tcs_rel_ids; 49 LLVMValueRef tes_patch_id; 50 LLVMValueRef gs_prim_id; 51 LLVMValueRef gs_invocation_id; 52 LLVMValueRef frag_pos[4]; 53 LLVMValueRef front_face; 54 LLVMValueRef ancillary; 55 LLVMValueRef sample_coverage; 56 57 /* For VS and PS: pre-loaded shader inputs. 58 * 59 * Currently only used for NIR shaders; indexed by variables' 60 * driver_location. 61 */ 62 LLVMValueRef *inputs; 63 64 void (*emit_outputs)(struct ac_shader_abi *abi, 65 unsigned max_outputs, 66 LLVMValueRef *addrs); 67 68 void (*emit_vertex)(struct ac_shader_abi *abi, 69 unsigned stream, 70 LLVMValueRef *addrs); 71 72 void (*emit_primitive)(struct ac_shader_abi *abi, 73 unsigned stream); 74 75 LLVMValueRef (*load_inputs)(struct ac_shader_abi *abi, 76 unsigned location, 77 unsigned driver_location, 78 unsigned component, 79 unsigned num_components, 80 unsigned vertex_index, 81 unsigned const_index, 82 LLVMTypeRef type); 83 84 LLVMValueRef (*load_tess_varyings)(struct ac_shader_abi *abi, 85 LLVMValueRef vertex_index, 86 LLVMValueRef param_index, 87 unsigned const_index, 88 unsigned location, 89 unsigned driver_location, 90 unsigned component, 91 unsigned num_components, 92 bool is_patch, 93 bool is_compact, 94 bool load_inputs); 95 96 void (*store_tcs_outputs)(struct ac_shader_abi *abi, 97 const struct nir_variable *var, 98 LLVMValueRef vertex_index, 99 LLVMValueRef param_index, 100 unsigned const_index, 101 LLVMValueRef src, 102 unsigned writemask); 103 104 LLVMValueRef (*load_tess_coord)(struct ac_shader_abi *abi, 105 LLVMTypeRef type, 106 unsigned num_components); 107 108 LLVMValueRef (*load_patch_vertices_in)(struct ac_shader_abi *abi); 109 110 LLVMValueRef (*load_tess_level)(struct ac_shader_abi *abi, 111 unsigned varying_id); 112 113 114 LLVMValueRef (*load_ubo)(struct ac_shader_abi *abi, LLVMValueRef index); 115 116 /** 117 * Load the descriptor for the given buffer. 118 * 119 * \param buffer the buffer as presented in NIR: this is the descriptor 120 * in Vulkan, and the buffer index in OpenGL/Gallium 121 * \param write whether buffer contents will be written 122 */ 123 LLVMValueRef (*load_ssbo)(struct ac_shader_abi *abi, 124 LLVMValueRef buffer, bool write); 125 126 /** 127 * Load a descriptor associated to a sampler. 128 * 129 * \param descriptor_set the descriptor set index (only for Vulkan) 130 * \param base_index the base index of the sampler variable 131 * \param constant_index constant part of an array index (or 0, if the 132 * sampler variable is not an array) 133 * \param index non-constant part of an array index (may be NULL) 134 * \param desc_type the type of descriptor to load 135 * \param image whether the descriptor is loaded for an image operation 136 */ 137 LLVMValueRef (*load_sampler_desc)(struct ac_shader_abi *abi, 138 unsigned descriptor_set, 139 unsigned base_index, 140 unsigned constant_index, 141 LLVMValueRef index, 142 enum ac_descriptor_type desc_type, 143 bool image, bool write); 144 145 /* Whether to clamp the shadow reference value to [0,1]on VI. Radeonsi currently 146 * uses it due to promoting D16 to D32, but radv needs it off. */ 147 bool clamp_shadow_reference; 148 149 /* Whether to workaround GFX9 ignoring the stride for the buffer size if IDXEN=0 150 * and LLVM optimizes an indexed load with constant index to IDXEN=0. */ 151 bool gfx9_stride_size_workaround; 152 }; 153 154 #endif /* AC_SHADER_ABI_H */ 155
