/* * Copyright © 2016 Intel Corporation * * 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 * the rights to use, copy, modify, merge, publish, distribute, sublicense, * 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 NONINFRINGEMENT. IN NO EVENT SHALL * THE AUTHORS OR COPYRIGHT HOLDERS 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. */ #include "anv_nir.h" #include "nir/nir_builder.h" static nir_ssa_def * load_frag_coord(nir_builder *b) { nir_foreach_variable(var, &b->shader->inputs) { if (var->data.location == VARYING_SLOT_POS) return nir_load_var(b, var); } nir_variable *pos = nir_variable_create(b->shader, nir_var_shader_in, glsl_vec4_type(), NULL); pos->data.location = VARYING_SLOT_POS; pos->data.origin_upper_left = true; return nir_load_var(b, pos); } static void try_lower_input_load(nir_function_impl *impl, nir_intrinsic_instr *load) { nir_deref_instr *deref = nir_src_as_deref(load->src[0]); assert(glsl_type_is_image(deref->type)); enum glsl_sampler_dim image_dim = glsl_get_sampler_dim(deref->type); if (image_dim != GLSL_SAMPLER_DIM_SUBPASS && image_dim != GLSL_SAMPLER_DIM_SUBPASS_MS) return; const bool multisampled = (image_dim == GLSL_SAMPLER_DIM_SUBPASS_MS); nir_builder b; nir_builder_init(&b, impl); b.cursor = nir_instr_remove(&load->instr); nir_ssa_def *frag_coord = nir_f2i32(&b, load_frag_coord(&b)); nir_ssa_def *offset = nir_ssa_for_src(&b, load->src[1], 2); nir_ssa_def *pos = nir_iadd(&b, frag_coord, offset); nir_ssa_def *layer = nir_load_layer_id(&b); nir_ssa_def *coord = nir_vec3(&b, nir_channel(&b, pos, 0), nir_channel(&b, pos, 1), layer); nir_tex_instr *tex = nir_tex_instr_create(b.shader, 3 + multisampled); tex->op = nir_texop_txf; switch (glsl_get_sampler_result_type(deref->type)) { case GLSL_TYPE_FLOAT: tex->dest_type = nir_type_float; break; case GLSL_TYPE_INT: tex->dest_type = nir_type_int; break; case GLSL_TYPE_UINT: tex->dest_type = nir_type_uint; break; default: unreachable("Invalid image type"); } tex->is_array = true; tex->is_shadow = false; tex->texture_index = 0; tex->sampler_index = 0; tex->src[0].src_type = nir_tex_src_texture_deref; tex->src[0].src = nir_src_for_ssa(&deref->dest.ssa); tex->src[1].src_type = nir_tex_src_coord; tex->src[1].src = nir_src_for_ssa(coord); tex->coord_components = 3; tex->src[2].src_type = nir_tex_src_lod; tex->src[2].src = nir_src_for_ssa(nir_imm_int(&b, 0)); if (image_dim == GLSL_SAMPLER_DIM_SUBPASS_MS) { tex->op = nir_texop_txf_ms; tex->src[3].src_type = nir_tex_src_ms_index; tex->src[3].src = load->src[2]; } nir_ssa_dest_init(&tex->instr, &tex->dest, 4, 32, NULL); nir_builder_instr_insert(&b, &tex->instr); nir_ssa_def_rewrite_uses(&load->dest.ssa, nir_src_for_ssa(&tex->dest.ssa)); } void anv_nir_lower_input_attachments(nir_shader *shader) { assert(shader->info.stage == MESA_SHADER_FRAGMENT); nir_foreach_function(function, shader) { if (!function->impl) continue; nir_foreach_block(block, function->impl) { nir_foreach_instr_safe(instr, block) { if (instr->type != nir_instr_type_intrinsic) continue; nir_intrinsic_instr *load = nir_instr_as_intrinsic(instr); if (load->intrinsic != nir_intrinsic_image_deref_load) continue; try_lower_input_load(function->impl, load); } } } }