1 /* 2 * Copyright 2017 Advanced Micro Devices, Inc. 3 * 4 * SPDX-License-Identifier: MIT 5 */ 6 7 #ifndef AC_SHADER_ABI_H 8 #define AC_SHADER_ABI_H 9 10 #include "ac_shader_args.h" 11 #include "ac_shader_util.h" 12 #include "compiler/shader_enums.h" 13 #include "nir.h" 14 #include <llvm-c/Core.h> 15 16 #include <assert.h> 17 18 #define AC_LLVM_MAX_OUTPUTS (VARYING_SLOT_VAR31 + 1) 19 20 /* Document the shader ABI during compilation. This is what allows radeonsi and 21 * radv to share a compiler backend. 22 */ 23 struct ac_shader_abi { 24 /* Each entry is a pointer to a f32 or a f16 value (only possible for FS) */ 25 LLVMValueRef outputs[AC_LLVM_MAX_OUTPUTS * 4]; 26 bool is_16bit[AC_LLVM_MAX_OUTPUTS * 4]; 27 28 /* These input registers sometimes need to be fixed up. */ 29 LLVMValueRef vertex_id; 30 LLVMValueRef vs_rel_patch_id; 31 LLVMValueRef instance_id; 32 33 /* replaced registers when culling enabled */ 34 LLVMValueRef vertex_id_replaced; 35 LLVMValueRef instance_id_replaced; 36 LLVMValueRef tes_u_replaced; 37 LLVMValueRef tes_v_replaced; 38 LLVMValueRef tes_rel_patch_id_replaced; 39 LLVMValueRef tes_patch_id_replaced; 40 41 /* Varying -> attribute number mapping. Also NIR-only */ 42 unsigned fs_input_attr_indices[MAX_VARYING]; 43 44 LLVMValueRef (*load_tess_varyings)(struct ac_shader_abi *abi, LLVMTypeRef type, 45 LLVMValueRef vertex_index, LLVMValueRef param_index, 46 unsigned driver_location, unsigned component, 47 unsigned num_components, bool load_inputs); 48 49 LLVMValueRef (*load_ubo)(struct ac_shader_abi *abi, LLVMValueRef index); 50 51 /** 52 * Load the descriptor for the given buffer. 53 * 54 * \param buffer the buffer as presented in NIR: this is the descriptor 55 * in Vulkan, and the buffer index in OpenGL/Gallium 56 * \param write whether buffer contents will be written 57 * \param non_uniform whether the buffer descriptor is not assumed to be uniform 58 */ 59 LLVMValueRef (*load_ssbo)(struct ac_shader_abi *abi, LLVMValueRef buffer, bool write, bool non_uniform); 60 61 /** 62 * Load a descriptor associated to a sampler. 63 * 64 * \param index of the descriptor 65 * \param desc_type the type of descriptor to load 66 */ 67 LLVMValueRef (*load_sampler_desc)(struct ac_shader_abi *abi, LLVMValueRef index, 68 enum ac_descriptor_type desc_type); 69 70 LLVMValueRef (*intrinsic_load)(struct ac_shader_abi *abi, nir_intrinsic_instr *intrin); 71 72 /* Whether to clamp the shadow reference value to [0,1]on GFX8. Radeonsi currently 73 * uses it due to promoting D16 to D32, but radv needs it off. */ 74 bool clamp_shadow_reference; 75 76 /* Whether bounds checks are required */ 77 bool robust_buffer_access; 78 79 /* Check for Inf interpolation coeff */ 80 bool kill_ps_if_inf_interp; 81 82 /* Clamp div by 0 (so it won't produce NaN) */ 83 bool clamp_div_by_zero; 84 85 /* Whether to inline the compute dispatch size in user sgprs. */ 86 bool load_grid_size_from_user_sgpr; 87 88 /* Whether to detect divergent textures/samplers index and apply 89 * waterfall to avoid incorrect rendering. */ 90 bool use_waterfall_for_divergent_tex_samplers; 91 92 /* Whether to disable anisotropic filtering. */ 93 bool disable_aniso_single_level; 94 }; 95 96 #endif /* AC_SHADER_ABI_H */ 97