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 "ac_shader_args.h" 28 #include "ac_shader_util.h" 29 #include "compiler/shader_enums.h" 30 #include "nir.h" 31 #include <llvm-c/Core.h> 32 33 #include <assert.h> 34 35 #define AC_LLVM_MAX_OUTPUTS (VARYING_SLOT_VAR31 + 1) 36 37 /* Document the shader ABI during compilation. This is what allows radeonsi and 38 * radv to share a compiler backend. 39 */ 40 struct ac_shader_abi { 41 /* Each entry is a pointer to a f32 or a f16 value (only possible for FS) */ 42 LLVMValueRef outputs[AC_LLVM_MAX_OUTPUTS * 4]; 43 bool is_16bit[AC_LLVM_MAX_OUTPUTS * 4]; 44 45 /* These input registers sometimes need to be fixed up. */ 46 LLVMValueRef vertex_id; 47 LLVMValueRef instance_id; 48 LLVMValueRef persp_centroid, linear_centroid; 49 LLVMValueRef color0, color1; 50 LLVMValueRef user_data; 51 52 /* Varying -> attribute number mapping. Also NIR-only */ 53 unsigned fs_input_attr_indices[MAX_VARYING]; 54 55 void (*export_vertex)(struct ac_shader_abi *abi); 56 57 void (*emit_vertex)(struct ac_shader_abi *abi, unsigned stream, LLVMValueRef *addrs); 58 59 void (*emit_primitive)(struct ac_shader_abi *abi, unsigned stream); 60 61 void (*emit_vertex_with_counter)(struct ac_shader_abi *abi, unsigned stream, 62 LLVMValueRef vertexidx, LLVMValueRef *addrs); 63 64 LLVMValueRef (*load_inputs)(struct ac_shader_abi *abi, 65 unsigned driver_location, unsigned component, 66 unsigned num_components, unsigned vertex_index, 67 LLVMTypeRef type); 68 69 LLVMValueRef (*load_tess_varyings)(struct ac_shader_abi *abi, LLVMTypeRef type, 70 LLVMValueRef vertex_index, LLVMValueRef param_index, 71 unsigned driver_location, unsigned component, 72 unsigned num_components, bool load_inputs); 73 74 LLVMValueRef (*load_ubo)(struct ac_shader_abi *abi, LLVMValueRef index); 75 76 /** 77 * Load the descriptor for the given buffer. 78 * 79 * \param buffer the buffer as presented in NIR: this is the descriptor 80 * in Vulkan, and the buffer index in OpenGL/Gallium 81 * \param write whether buffer contents will be written 82 * \param non_uniform whether the buffer descriptor is not assumed to be uniform 83 */ 84 LLVMValueRef (*load_ssbo)(struct ac_shader_abi *abi, LLVMValueRef buffer, bool write, bool non_uniform); 85 86 /** 87 * Load a descriptor associated to a sampler. 88 * 89 * \param descriptor_set the descriptor set index (only for Vulkan) 90 * \param base_index the base index of the sampler variable 91 * \param constant_index constant part of an array index (or 0, if the 92 * sampler variable is not an array) 93 * \param index non-constant part of an array index (may be NULL) 94 * \param desc_type the type of descriptor to load 95 * \param image whether the descriptor is loaded for an image operation 96 */ 97 LLVMValueRef (*load_sampler_desc)(struct ac_shader_abi *abi, unsigned descriptor_set, 98 unsigned base_index, unsigned constant_index, 99 LLVMValueRef index, enum ac_descriptor_type desc_type, 100 bool image, bool write, bool bindless); 101 102 LLVMValueRef (*load_sample_position)(struct ac_shader_abi *abi, LLVMValueRef sample_id); 103 104 LLVMValueRef (*emit_fbfetch)(struct ac_shader_abi *abi); 105 106 LLVMValueRef (*intrinsic_load)(struct ac_shader_abi *abi, nir_intrinsic_op op); 107 108 /* Whether to clamp the shadow reference value to [0,1]on GFX8. Radeonsi currently 109 * uses it due to promoting D16 to D32, but radv needs it off. */ 110 bool clamp_shadow_reference; 111 bool interp_at_sample_force_center; 112 113 /* Whether bounds checks are required */ 114 bool robust_buffer_access; 115 116 /* Check for Inf interpolation coeff */ 117 bool kill_ps_if_inf_interp; 118 119 /* Whether undef values must be converted to zero */ 120 bool convert_undef_to_zero; 121 122 /* Clamp div by 0 (so it won't produce NaN) */ 123 bool clamp_div_by_zero; 124 125 /* Whether to inline the compute dispatch size in user sgprs. */ 126 bool load_grid_size_from_user_sgpr; 127 128 /* Whether to detect divergent textures/samplers index and apply 129 * waterfall to avoid incorrect rendering. */ 130 bool use_waterfall_for_divergent_tex_samplers; 131 132 /* Number of all interpolated inputs */ 133 unsigned num_interp; 134 }; 135 136 #endif /* AC_SHADER_ABI_H */ 137