--- /dev/null
+/*
+ * Copyright © 2022 Konstantin Seurer
+ *
+ * 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 "nir/nir.h"
+#include "nir/nir_builder.h"
+
+#include "util/hash_table.h"
+
+#include "radv_acceleration_structure.h"
+#include "radv_debug.h"
+#include "radv_private.h"
+#include "radv_rt_common.h"
+#include "radv_shader.h"
+
+typedef struct {
+ nir_variable *variable;
+ unsigned array_length;
+} rq_variable;
+
+static rq_variable *
+rq_variable_create(nir_shader *shader, nir_function_impl *impl, unsigned array_length,
+ const struct glsl_type *type, const char *name)
+{
+ rq_variable *result = ralloc(shader ? (void *)shader : (void *)impl, rq_variable);
+ result->array_length = array_length;
+
+ const struct glsl_type *variable_type = type;
+ if (array_length != 1)
+ variable_type = glsl_array_type(type, array_length, glsl_get_explicit_stride(type));
+
+ if (shader) {
+ result->variable = nir_variable_create(shader, nir_var_shader_temp, variable_type, name);
+ } else {
+ result->variable = nir_local_variable_create(impl, variable_type, name);
+ }
+
+ return result;
+}
+
+static nir_ssa_def *
+nir_load_array(nir_builder *b, nir_variable *array, nir_ssa_def *index)
+{
+ return nir_load_deref(b, nir_build_deref_array(b, nir_build_deref_var(b, array), index));
+}
+
+static void
+nir_store_array(nir_builder *b, nir_variable *array, nir_ssa_def *index, nir_ssa_def *value,
+ unsigned writemask)
+{
+ nir_store_deref(b, nir_build_deref_array(b, nir_build_deref_var(b, array), index), value,
+ writemask);
+}
+
+static nir_ssa_def *
+rq_load_var(nir_builder *b, nir_ssa_def *index, rq_variable *var)
+{
+ if (var->array_length == 1)
+ return nir_load_var(b, var->variable);
+
+ return nir_load_array(b, var->variable, index);
+}
+
+static void
+rq_store_var(nir_builder *b, nir_ssa_def *index, rq_variable *var, nir_ssa_def *value,
+ unsigned writemask)
+{
+ if (var->array_length == 1) {
+ nir_store_var(b, var->variable, value, writemask);
+ } else {
+ nir_store_array(b, var->variable, index, value, writemask);
+ }
+}
+
+static void
+rq_copy_var(nir_builder *b, nir_ssa_def *index, rq_variable *dst, rq_variable *src, unsigned mask)
+{
+ rq_store_var(b, index, dst, rq_load_var(b, index, src), mask);
+}
+
+static nir_ssa_def *
+rq_load_array(nir_builder *b, nir_ssa_def *index, rq_variable *var, nir_ssa_def *array_index)
+{
+ if (var->array_length == 1)
+ return nir_load_array(b, var->variable, array_index);
+
+ return nir_load_deref(
+ b,
+ nir_build_deref_array(
+ b, nir_build_deref_array(b, nir_build_deref_var(b, var->variable), index), array_index));
+}
+
+static void
+rq_store_array(nir_builder *b, nir_ssa_def *index, rq_variable *var, nir_ssa_def *array_index,
+ nir_ssa_def *value, unsigned writemask)
+{
+ if (var->array_length == 1) {
+ nir_store_array(b, var->variable, array_index, value, writemask);
+ } else {
+ nir_store_deref(
+ b,
+ nir_build_deref_array(
+ b, nir_build_deref_array(b, nir_build_deref_var(b, var->variable), index), array_index),
+ value, writemask);
+ }
+}
+
+struct ray_query_traversal_vars {
+ rq_variable *origin;
+ rq_variable *direction;
+
+ rq_variable *inv_dir;
+ rq_variable *bvh_base;
+ rq_variable *stack;
+ rq_variable *top_stack;
+};
+
+struct ray_query_intersection_vars {
+ rq_variable *primitive_id;
+ rq_variable *geometry_id_and_flags;
+ rq_variable *instance_id;
+ rq_variable *instance_addr;
+ rq_variable *intersection_type;
+ rq_variable *opaque;
+ rq_variable *frontface;
+ rq_variable *custom_instance_and_mask;
+ rq_variable *sbt_offset_and_flags;
+ rq_variable *barycentrics;
+ rq_variable *t;
+};
+
+struct ray_query_vars {
+ rq_variable *accel_struct;
+ rq_variable *flags;
+ rq_variable *cull_mask;
+ rq_variable *origin;
+ rq_variable *tmin;
+ rq_variable *direction;
+
+ rq_variable *incomplete;
+
+ struct ray_query_intersection_vars closest;
+ struct ray_query_intersection_vars candidate;
+
+ struct ray_query_traversal_vars trav;
+
+ rq_variable *stack;
+};
+
+#define VAR_NAME(name) \
+ strcat(strcpy(ralloc_size(impl, strlen(base_name) + strlen(name) + 1), base_name), name)
+
+static struct ray_query_traversal_vars
+init_ray_query_traversal_vars(nir_shader *shader, nir_function_impl *impl, unsigned array_length,
+ const char *base_name)
+{
+ struct ray_query_traversal_vars result;
+
+ const struct glsl_type *vec3_type = glsl_vector_type(GLSL_TYPE_FLOAT, 3);
+
+ result.origin = rq_variable_create(shader, impl, array_length, vec3_type, VAR_NAME("_origin"));
+ result.direction =
+ rq_variable_create(shader, impl, array_length, vec3_type, VAR_NAME("_direction"));
+
+ result.inv_dir = rq_variable_create(shader, impl, array_length, vec3_type, VAR_NAME("_inv_dir"));
+ result.bvh_base =
+ rq_variable_create(shader, impl, array_length, glsl_uint64_t_type(), VAR_NAME("_bvh_base"));
+ result.stack =
+ rq_variable_create(shader, impl, array_length, glsl_uint_type(), VAR_NAME("_stack"));
+ result.top_stack =
+ rq_variable_create(shader, impl, array_length, glsl_uint_type(), VAR_NAME("_top_stack"));
+
+ return result;
+}
+
+static struct ray_query_intersection_vars
+init_ray_query_intersection_vars(nir_shader *shader, nir_function_impl *impl, unsigned array_length,
+ const char *base_name)
+{
+ struct ray_query_intersection_vars result;
+
+ const struct glsl_type *vec2_type = glsl_vector_type(GLSL_TYPE_FLOAT, 2);
+
+ result.primitive_id =
+ rq_variable_create(shader, impl, array_length, glsl_uint_type(), VAR_NAME("_primitive_id"));
+ result.geometry_id_and_flags = rq_variable_create(shader, impl, array_length, glsl_uint_type(),
+ VAR_NAME("_geometry_id_and_flags"));
+ result.instance_id =
+ rq_variable_create(shader, impl, array_length, glsl_uint_type(), VAR_NAME("_instance_id"));
+ result.instance_addr = rq_variable_create(shader, impl, array_length, glsl_uint64_t_type(),
+ VAR_NAME("_instance_addr"));
+ result.intersection_type = rq_variable_create(shader, impl, array_length, glsl_uint_type(),
+ VAR_NAME("_intersection_type"));
+ result.opaque =
+ rq_variable_create(shader, impl, array_length, glsl_bool_type(), VAR_NAME("_opaque"));
+ result.frontface =
+ rq_variable_create(shader, impl, array_length, glsl_bool_type(), VAR_NAME("_frontface"));
+ result.custom_instance_and_mask = rq_variable_create(
+ shader, impl, array_length, glsl_uint_type(), VAR_NAME("_custom_instance_and_mask"));
+ result.sbt_offset_and_flags = rq_variable_create(shader, impl, array_length, glsl_uint_type(),
+ VAR_NAME("_sbt_offset_and_flags"));
+ result.barycentrics =
+ rq_variable_create(shader, impl, array_length, vec2_type, VAR_NAME("_barycentrics"));
+ result.t = rq_variable_create(shader, impl, array_length, glsl_float_type(), VAR_NAME("_t"));
+
+ return result;
+}
+
+static void
+init_ray_query_vars(nir_shader *shader, nir_function_impl *impl, unsigned array_length,
+ struct ray_query_vars *dst, const char *base_name)
+{
+ const struct glsl_type *vec3_type = glsl_vector_type(GLSL_TYPE_FLOAT, 3);
+
+ dst->accel_struct = rq_variable_create(shader, impl, array_length, glsl_uint64_t_type(),
+ VAR_NAME("_accel_struct"));
+ dst->flags =
+ rq_variable_create(shader, impl, array_length, glsl_uint_type(), VAR_NAME("_flags"));
+ dst->cull_mask =
+ rq_variable_create(shader, impl, array_length, glsl_uint_type(), VAR_NAME("_cull_mask"));
+ dst->origin = rq_variable_create(shader, impl, array_length, vec3_type, VAR_NAME("_origin"));
+ dst->tmin = rq_variable_create(shader, impl, array_length, glsl_float_type(), VAR_NAME("_tmin"));
+ dst->direction =
+ rq_variable_create(shader, impl, array_length, vec3_type, VAR_NAME("_direction"));
+
+ dst->incomplete =
+ rq_variable_create(shader, impl, array_length, glsl_bool_type(), VAR_NAME("_incomplete"));
+
+ dst->closest =
+ init_ray_query_intersection_vars(shader, impl, array_length, VAR_NAME("_closest"));
+ dst->candidate =
+ init_ray_query_intersection_vars(shader, impl, array_length, VAR_NAME("_candidate"));
+
+ dst->trav = init_ray_query_traversal_vars(shader, impl, array_length, VAR_NAME("_top"));
+
+ dst->stack = rq_variable_create(shader, impl, array_length,
+ glsl_array_type(glsl_uint_type(), MAX_STACK_ENTRY_COUNT,
+ glsl_get_explicit_stride(glsl_uint_type())),
+ VAR_NAME("_stack"));
+}
+
+#undef VAR_NAME
+
+static void
+lower_ray_query(nir_shader *shader, nir_function_impl *impl, nir_variable *ray_query,
+ struct hash_table *ht)
+{
+ struct ray_query_vars *vars = ralloc(impl, struct ray_query_vars);
+
+ unsigned array_length = 1;
+ if (glsl_type_is_array(ray_query->type))
+ array_length = glsl_get_length(ray_query->type);
+
+ init_ray_query_vars(shader, impl, array_length, vars,
+ ray_query->name == NULL ? "" : ray_query->name);
+
+ _mesa_hash_table_insert(ht, ray_query, vars);
+}
+
+static void
+copy_candidate_to_closest(nir_builder *b, nir_ssa_def *index, struct ray_query_vars *vars)
+{
+ rq_copy_var(b, index, vars->closest.barycentrics, vars->candidate.barycentrics, 0x3);
+ rq_copy_var(b, index, vars->closest.custom_instance_and_mask,
+ vars->candidate.custom_instance_and_mask, 0x1);
+ rq_copy_var(b, index, vars->closest.geometry_id_and_flags, vars->candidate.geometry_id_and_flags,
+ 0x1);
+ rq_copy_var(b, index, vars->closest.instance_addr, vars->candidate.instance_addr, 0x1);
+ rq_copy_var(b, index, vars->closest.instance_id, vars->candidate.instance_id, 0x1);
+ rq_copy_var(b, index, vars->closest.intersection_type, vars->candidate.intersection_type, 0x1);
+ rq_copy_var(b, index, vars->closest.opaque, vars->candidate.opaque, 0x1);
+ rq_copy_var(b, index, vars->closest.frontface, vars->candidate.frontface, 0x1);
+ rq_copy_var(b, index, vars->closest.sbt_offset_and_flags, vars->candidate.sbt_offset_and_flags,
+ 0x1);
+ rq_copy_var(b, index, vars->closest.primitive_id, vars->candidate.primitive_id, 0x1);
+ rq_copy_var(b, index, vars->closest.t, vars->candidate.t, 0x1);
+}
+
+static void
+insert_terminate_on_first_hit(nir_builder *b, nir_ssa_def *index, struct ray_query_vars *vars,
+ bool break_on_terminate)
+{
+ nir_ssa_def *terminate_on_first_hit =
+ nir_ine(b,
+ nir_iand(b, rq_load_var(b, index, vars->flags),
+ nir_imm_int(b, 4 /* TerminateOnFirstHitKHR */)),
+ nir_imm_int(b, 0));
+ nir_push_if(b, terminate_on_first_hit);
+ {
+ rq_store_var(b, index, vars->incomplete, nir_imm_bool(b, false), 0x1);
+ if (break_on_terminate)
+ nir_jump(b, nir_jump_break);
+ }
+ nir_pop_if(b, NULL);
+}
+
+static void
+lower_rq_confirm_intersection(nir_builder *b, nir_ssa_def *index, nir_intrinsic_instr *instr,
+ struct ray_query_vars *vars)
+{
+ copy_candidate_to_closest(b, index, vars);
+ insert_terminate_on_first_hit(b, index, vars, false);
+}
+
+static void
+lower_rq_generate_intersection(nir_builder *b, nir_ssa_def *index, nir_intrinsic_instr *instr,
+ struct ray_query_vars *vars)
+{
+ nir_push_if(b, nir_iand(b, nir_flt(b, instr->src[1].ssa, rq_load_var(b, index, vars->closest.t)),
+ nir_fge(b, instr->src[1].ssa, rq_load_var(b, index, vars->tmin))));
+ {
+ copy_candidate_to_closest(b, index, vars);
+ insert_terminate_on_first_hit(b, index, vars, false);
+ rq_store_var(b, index, vars->closest.t, instr->src[1].ssa, 0x1);
+ }
+ nir_pop_if(b, NULL);
+}
+
+enum rq_intersection_type {
+ intersection_type_none,
+ intersection_type_triangle,
+ intersection_type_aabb
+};
+
+static void
+lower_rq_initialize(nir_builder *b, nir_ssa_def *index, nir_intrinsic_instr *instr,
+ struct ray_query_vars *vars)
+{
+ rq_store_var(b, index, vars->accel_struct, instr->src[1].ssa, 0x1);
+ rq_store_var(b, index, vars->flags, instr->src[2].ssa, 0x1);
+ rq_store_var(b, index, vars->cull_mask, nir_iand(b, instr->src[3].ssa, nir_imm_int(b, 0xff)),
+ 0x1);
+
+ rq_store_var(b, index, vars->origin, instr->src[4].ssa, 0x7);
+ rq_store_var(b, index, vars->trav.origin, instr->src[4].ssa, 0x7);
+
+ rq_store_var(b, index, vars->tmin, instr->src[5].ssa, 0x1);
+
+ rq_store_var(b, index, vars->direction, instr->src[6].ssa, 0x7);
+ rq_store_var(b, index, vars->trav.direction, instr->src[6].ssa, 0x7);
+
+ nir_ssa_def *vec3ones = nir_channels(b, nir_imm_vec4(b, 1.0, 1.0, 1.0, 1.0), 0x7);
+ rq_store_var(b, index, vars->trav.inv_dir, nir_fdiv(b, vec3ones, instr->src[6].ssa), 0x7);
+
+ rq_store_var(b, index, vars->closest.t, instr->src[7].ssa, 0x1);
+ rq_store_var(b, index, vars->closest.intersection_type, nir_imm_int(b, intersection_type_none),
+ 0x1);
+
+ nir_ssa_def *accel_struct = rq_load_var(b, index, vars->accel_struct);
+
+ nir_push_if(b, nir_ine(b, accel_struct, nir_imm_int64(b, 0)));
+ {
+ rq_store_var(b, index, vars->trav.bvh_base, build_addr_to_node(b, accel_struct), 1);
+
+ nir_ssa_def *bvh_root =
+ nir_build_load_global(b, 1, 32, accel_struct, .access = ACCESS_NON_WRITEABLE,
+ .align_mul = 64, .align_offset = 0);
+
+ rq_store_var(b, index, vars->trav.stack, nir_imm_int(b, 1), 0x1);
+ rq_store_array(b, index, vars->stack, nir_imm_int(b, 0), bvh_root, 0x1);
+
+ rq_store_var(b, index, vars->trav.top_stack, nir_imm_int(b, 0), 1);
+
+ rq_store_var(b, index, vars->incomplete, nir_imm_bool(b, true), 0x1);
+ }
+ nir_push_else(b, NULL);
+ {
+ rq_store_var(b, index, vars->incomplete, nir_imm_bool(b, false), 0x1);
+ }
+ nir_pop_if(b, NULL);
+}
+
+static nir_ssa_def *
+lower_rq_load(nir_builder *b, nir_ssa_def *index, struct ray_query_vars *vars,
+ nir_ssa_def *committed, nir_ray_query_value value, unsigned column)
+{
+ switch (value) {
+ case nir_ray_query_value_flags:
+ return rq_load_var(b, index, vars->flags);
+ case nir_ray_query_value_intersection_barycentrics:
+ return nir_bcsel(b, committed, rq_load_var(b, index, vars->closest.barycentrics),
+ rq_load_var(b, index, vars->candidate.barycentrics));
+ case nir_ray_query_value_intersection_candidate_aabb_opaque:
+ return nir_iand(b, rq_load_var(b, index, vars->candidate.opaque),
+ nir_ieq(b, rq_load_var(b, index, vars->candidate.intersection_type),
+ nir_imm_int(b, intersection_type_aabb)));
+ case nir_ray_query_value_intersection_front_face:
+ return nir_bcsel(b, committed, rq_load_var(b, index, vars->closest.frontface),
+ rq_load_var(b, index, vars->candidate.frontface));
+ case nir_ray_query_value_intersection_geometry_index:
+ return nir_iand(
+ b,
+ nir_bcsel(b, committed, rq_load_var(b, index, vars->closest.geometry_id_and_flags),
+ rq_load_var(b, index, vars->candidate.geometry_id_and_flags)),
+ nir_imm_int(b, 0xFFFFFF));
+ case nir_ray_query_value_intersection_instance_custom_index:
+ return nir_iand(
+ b,
+ nir_bcsel(b, committed, rq_load_var(b, index, vars->closest.custom_instance_and_mask),
+ rq_load_var(b, index, vars->candidate.custom_instance_and_mask)),
+ nir_imm_int(b, 0xFFFFFF));
+ case nir_ray_query_value_intersection_instance_id:
+ return nir_bcsel(b, committed, rq_load_var(b, index, vars->closest.instance_id),
+ rq_load_var(b, index, vars->candidate.instance_id));
+ case nir_ray_query_value_intersection_instance_sbt_index:
+ return nir_iand(
+ b,
+ nir_bcsel(b, committed, rq_load_var(b, index, vars->closest.sbt_offset_and_flags),
+ rq_load_var(b, index, vars->candidate.sbt_offset_and_flags)),
+ nir_imm_int(b, 0xFFFFFF));
+ case nir_ray_query_value_intersection_object_ray_direction: {
+ nir_ssa_def *instance_node_addr =
+ nir_bcsel(b, committed, rq_load_var(b, index, vars->closest.instance_addr),
+ rq_load_var(b, index, vars->candidate.instance_addr));
+ nir_ssa_def *wto_matrix[3];
+ nir_build_wto_matrix_load(b, instance_node_addr, wto_matrix);
+ return nir_build_vec3_mat_mult(b, rq_load_var(b, index, vars->direction), wto_matrix, false);
+ }
+ case nir_ray_query_value_intersection_object_ray_origin: {
+ nir_ssa_def *instance_node_addr =
+ nir_bcsel(b, committed, rq_load_var(b, index, vars->closest.instance_addr),
+ rq_load_var(b, index, vars->candidate.instance_addr));
+ nir_ssa_def *wto_matrix[] = {
+ nir_build_load_global(b, 4, 32, nir_iadd(b, instance_node_addr, nir_imm_int64(b, 16)),
+ .align_mul = 64, .align_offset = 16),
+ nir_build_load_global(b, 4, 32, nir_iadd(b, instance_node_addr, nir_imm_int64(b, 32)),
+ .align_mul = 64, .align_offset = 32),
+ nir_build_load_global(b, 4, 32, nir_iadd(b, instance_node_addr, nir_imm_int64(b, 48)),
+ .align_mul = 64, .align_offset = 48)};
+ return nir_build_vec3_mat_mult_pre(b, rq_load_var(b, index, vars->origin), wto_matrix);
+ }
+ case nir_ray_query_value_intersection_object_to_world: {
+ nir_ssa_def *instance_node_addr =
+ nir_bcsel(b, committed, rq_load_var(b, index, vars->closest.instance_addr),
+ rq_load_var(b, index, vars->candidate.instance_addr));
+
+ if (column == 3) {
+ nir_ssa_def *wto_matrix[3];
+ nir_build_wto_matrix_load(b, instance_node_addr, wto_matrix);
+
+ nir_ssa_def *vals[3];
+ for (unsigned i = 0; i < 3; ++i)
+ vals[i] = nir_channel(b, wto_matrix[i], column);
+
+ return nir_vec(b, vals, 3);
+ }
+
+ return nir_build_load_global(
+ b, 3, 32, nir_iadd(b, instance_node_addr, nir_imm_int64(b, 92 + column * 12)),
+ .align_mul = 4, .align_offset = 0);
+ }
+ case nir_ray_query_value_intersection_primitive_index:
+ return nir_bcsel(b, committed, rq_load_var(b, index, vars->closest.primitive_id),
+ rq_load_var(b, index, vars->candidate.primitive_id));
+ case nir_ray_query_value_intersection_t:
+ return nir_bcsel(b, committed, rq_load_var(b, index, vars->closest.t),
+ rq_load_var(b, index, vars->candidate.t));
+ case nir_ray_query_value_intersection_type:
+ return nir_bcsel(
+ b, committed, rq_load_var(b, index, vars->closest.intersection_type),
+ nir_isub(b, rq_load_var(b, index, vars->candidate.intersection_type), nir_imm_int(b, 1)));
+ case nir_ray_query_value_intersection_world_to_object: {
+ nir_ssa_def *instance_node_addr =
+ nir_bcsel(b, committed, rq_load_var(b, index, vars->closest.instance_addr),
+ rq_load_var(b, index, vars->candidate.instance_addr));
+
+ nir_ssa_def *wto_matrix[3];
+ nir_build_wto_matrix_load(b, instance_node_addr, wto_matrix);
+
+ nir_ssa_def *vals[3];
+ for (unsigned i = 0; i < 3; ++i)
+ vals[i] = nir_channel(b, wto_matrix[i], column);
+
+ if (column == 3)
+ return nir_fneg(b, nir_build_vec3_mat_mult(b, nir_vec(b, vals, 3), wto_matrix, false));
+
+ return nir_vec(b, vals, 3);
+ }
+ case nir_ray_query_value_tmin:
+ return rq_load_var(b, index, vars->tmin);
+ case nir_ray_query_value_world_ray_direction:
+ return rq_load_var(b, index, vars->direction);
+ case nir_ray_query_value_world_ray_origin:
+ return rq_load_var(b, index, vars->origin);
+ default:
+ unreachable("Invalid nir_ray_query_value!");
+ }
+
+ return NULL;
+}
+
+static void
+insert_traversal_triangle_case(struct radv_device *device, nir_builder *b, nir_ssa_def *index,
+ nir_ssa_def *result, struct ray_query_vars *vars,
+ nir_ssa_def *bvh_node)
+{
+ nir_ssa_def *dist = nir_vector_extract(b, result, nir_imm_int(b, 0));
+ nir_ssa_def *div = nir_vector_extract(b, result, nir_imm_int(b, 1));
+ dist = nir_fdiv(b, dist, div);
+ nir_ssa_def *frontface = nir_flt(b, nir_imm_float(b, 0), div);
+ nir_ssa_def *switch_ccw = nir_ine(
+ b,
+ nir_iand(
+ b, rq_load_var(b, index, vars->candidate.sbt_offset_and_flags),
+ nir_imm_int(b, 2 << 24 /* VK_GEOMETRY_INSTANCE_TRIANGLE_FRONT_COUNTERCLOCKWISE_BIT */)),
+ nir_imm_int(b, 0));
+ frontface = nir_ixor(b, frontface, switch_ccw);
+ rq_store_var(b, index, vars->candidate.frontface, frontface, 0x1);
+
+ nir_ssa_def *not_cull = nir_ieq(b,
+ nir_iand(b, rq_load_var(b, index, vars->flags),
+ nir_imm_int(b, 256 /* RayFlagsSkipTriangles */)),
+ nir_imm_int(b, 0));
+ nir_ssa_def *not_facing_cull = nir_ieq(
+ b,
+ nir_iand(b, rq_load_var(b, index, vars->flags),
+ nir_bcsel(b, frontface, nir_imm_int(b, 32 /* RayFlagsCullFrontFacingTriangles */),
+ nir_imm_int(b, 16 /* RayFlagsCullBackFacingTriangles */))),
+ nir_imm_int(b, 0));
+
+ not_cull = nir_iand(
+ b, not_cull,
+ nir_ior(
+ b, not_facing_cull,
+ nir_ine(
+ b,
+ nir_iand(
+ b, rq_load_var(b, index, vars->candidate.sbt_offset_and_flags),
+ nir_imm_int(b, 1 << 24 /* VK_GEOMETRY_INSTANCE_TRIANGLE_FACING_CULL_DISABLE_BIT */)),
+ nir_imm_int(b, 0))));
+
+ nir_push_if(b, nir_iand(b,
+ nir_iand(b, nir_flt(b, dist, rq_load_var(b, index, vars->closest.t)),
+ nir_fge(b, dist, rq_load_var(b, index, vars->tmin))),
+ not_cull));
+ {
+ nir_ssa_def *triangle_info = nir_build_load_global(
+ b, 2, 32,
+ nir_iadd(b, build_node_to_addr(device, b, bvh_node),
+ nir_imm_int64(b, offsetof(struct radv_bvh_triangle_node, triangle_id))),
+ .align_mul = 4, .align_offset = 0);
+ nir_ssa_def *primitive_id = nir_channel(b, triangle_info, 0);
+ nir_ssa_def *geometry_id_and_flags = nir_channel(b, triangle_info, 1);
+ nir_ssa_def *is_opaque =
+ hit_is_opaque(b, rq_load_var(b, index, vars->candidate.sbt_offset_and_flags),
+ rq_load_var(b, index, vars->flags), geometry_id_and_flags);
+
+ not_cull =
+ nir_ieq(b,
+ nir_iand(b, rq_load_var(b, index, vars->flags),
+ nir_bcsel(b, is_opaque, nir_imm_int(b, 0x40), nir_imm_int(b, 0x80))),
+ nir_imm_int(b, 0));
+ nir_push_if(b, not_cull);
+ {
+ nir_ssa_def *divs[2] = {div, div};
+ nir_ssa_def *ij = nir_fdiv(b, nir_channels(b, result, 0xc), nir_vec(b, divs, 2));
+
+ rq_store_var(b, index, vars->candidate.barycentrics, ij, 3);
+ rq_store_var(b, index, vars->candidate.primitive_id, primitive_id, 1);
+ rq_store_var(b, index, vars->candidate.geometry_id_and_flags, geometry_id_and_flags, 1);
+ rq_store_var(b, index, vars->candidate.t, dist, 0x1);
+ rq_store_var(b, index, vars->candidate.opaque, is_opaque, 0x1);
+ rq_store_var(b, index, vars->candidate.intersection_type,
+ nir_imm_int(b, intersection_type_triangle), 0x1);
+
+ nir_push_if(b, is_opaque);
+ {
+ copy_candidate_to_closest(b, index, vars);
+ insert_terminate_on_first_hit(b, index, vars, true);
+ }
+ nir_push_else(b, NULL);
+ {
+ nir_jump(b, nir_jump_break);
+ }
+ nir_pop_if(b, NULL);
+ }
+ nir_pop_if(b, NULL);
+ }
+ nir_pop_if(b, NULL);
+}
+
+static void
+insert_traversal_aabb_case(struct radv_device *device, nir_builder *b, nir_ssa_def *index,
+ struct ray_query_vars *vars, nir_ssa_def *bvh_node)
+{
+ nir_ssa_def *node_addr = build_node_to_addr(device, b, bvh_node);
+ nir_ssa_def *triangle_info = nir_build_load_global(
+ b, 2, 32, nir_iadd(b, node_addr, nir_imm_int64(b, 24)), .align_mul = 4, .align_offset = 0);
+ nir_ssa_def *primitive_id = nir_channel(b, triangle_info, 0);
+ nir_ssa_def *geometry_id_and_flags = nir_channel(b, triangle_info, 1);
+ nir_ssa_def *is_opaque =
+ hit_is_opaque(b, rq_load_var(b, index, vars->candidate.sbt_offset_and_flags),
+ rq_load_var(b, index, vars->flags), geometry_id_and_flags);
+
+ nir_ssa_def *not_skip_aabb = nir_ieq(
+ b,
+ nir_iand(b, rq_load_var(b, index, vars->flags), nir_imm_int(b, 512 /* RayFlagsSkipAABB */)),
+ nir_imm_int(b, 0));
+ nir_ssa_def *not_cull = nir_iand(
+ b, not_skip_aabb,
+ nir_ieq(b,
+ nir_iand(b, rq_load_var(b, index, vars->flags),
+ nir_bcsel(b, is_opaque, nir_imm_int(b, 0x40), nir_imm_int(b, 0x80))),
+ nir_imm_int(b, 0)));
+ nir_push_if(b, not_cull);
+ {
+ nir_ssa_def *vec3_zero = nir_channels(b, nir_imm_vec4(b, 0, 0, 0, 0), 0x7);
+ nir_ssa_def *vec3_inf =
+ nir_channels(b, nir_imm_vec4(b, INFINITY, INFINITY, INFINITY, 0), 0x7);
+
+ nir_ssa_def *bvh_lo = nir_build_load_global(
+ b, 3, 32, nir_iadd(b, node_addr, nir_imm_int64(b, 0)), .align_mul = 4, .align_offset = 0);
+ nir_ssa_def *bvh_hi = nir_build_load_global(
+ b, 3, 32, nir_iadd(b, node_addr, nir_imm_int64(b, 12)), .align_mul = 4, .align_offset = 0);
+
+ bvh_lo = nir_fsub(b, bvh_lo, rq_load_var(b, index, vars->trav.origin));
+ bvh_hi = nir_fsub(b, bvh_hi, rq_load_var(b, index, vars->trav.origin));
+ nir_ssa_def *t_vec =
+ nir_fmin(b, nir_fmul(b, bvh_lo, rq_load_var(b, index, vars->trav.inv_dir)),
+ nir_fmul(b, bvh_hi, rq_load_var(b, index, vars->trav.inv_dir)));
+ nir_ssa_def *t2_vec =
+ nir_fmax(b, nir_fmul(b, bvh_lo, rq_load_var(b, index, vars->trav.inv_dir)),
+ nir_fmul(b, bvh_hi, rq_load_var(b, index, vars->trav.inv_dir)));
+ /* If we run parallel to one of the edges the range should be [0, inf) not [0,0] */
+ t2_vec = nir_bcsel(b, nir_feq(b, rq_load_var(b, index, vars->trav.direction), vec3_zero),
+ vec3_inf, t2_vec);
+
+ nir_ssa_def *t_min = nir_fmax(b, nir_channel(b, t_vec, 0), nir_channel(b, t_vec, 1));
+ t_min = nir_fmax(b, t_min, nir_channel(b, t_vec, 2));
+
+ nir_ssa_def *t_max = nir_fmin(b, nir_channel(b, t2_vec, 0), nir_channel(b, t2_vec, 1));
+ t_max = nir_fmin(b, t_max, nir_channel(b, t2_vec, 2));
+
+ nir_push_if(b, nir_iand(b, nir_flt(b, t_min, rq_load_var(b, index, vars->closest.t)),
+ nir_fge(b, t_max, rq_load_var(b, index, vars->tmin))));
+ {
+ rq_store_var(b, index, vars->candidate.t,
+ nir_fmax(b, t_min, rq_load_var(b, index, vars->tmin)), 0x1);
+ rq_store_var(b, index, vars->candidate.primitive_id, primitive_id, 1);
+ rq_store_var(b, index, vars->candidate.geometry_id_and_flags, geometry_id_and_flags, 1);
+ rq_store_var(b, index, vars->candidate.opaque, is_opaque, 0x1);
+ rq_store_var(b, index, vars->candidate.intersection_type,
+ nir_imm_int(b, intersection_type_aabb), 0x1);
+
+ nir_push_if(b, is_opaque);
+ {
+ copy_candidate_to_closest(b, index, vars);
+ }
+ nir_pop_if(b, NULL);
+
+ nir_jump(b, nir_jump_break);
+ }
+ nir_pop_if(b, NULL);
+ }
+ nir_pop_if(b, NULL);
+}
+
+static nir_ssa_def *
+lower_rq_proceed(nir_builder *b, nir_ssa_def *index, struct ray_query_vars *vars,
+ struct radv_device *device)
+{
+ nir_push_if(b, rq_load_var(b, index, vars->incomplete));
+ {
+ nir_ssa_def *desc = create_bvh_descriptor(b);
+ nir_ssa_def *vec3ones = nir_channels(b, nir_imm_vec4(b, 1.0, 1.0, 1.0, 1.0), 0x7);
+
+ nir_push_loop(b);
+ {
+ nir_push_if(b, nir_uge(b, rq_load_var(b, index, vars->trav.top_stack),
+ rq_load_var(b, index, vars->trav.stack)));
+ {
+ nir_push_if(b, nir_ieq(b, rq_load_var(b, index, vars->trav.stack), nir_imm_int(b, 0)));
+ {
+ rq_store_var(b, index, vars->incomplete, nir_imm_bool(b, false), 0x1);
+ nir_jump(b, nir_jump_break);
+ }
+ nir_pop_if(b, NULL);
+
+ rq_store_var(b, index, vars->trav.top_stack, nir_imm_int(b, 0), 1);
+ rq_store_var(b, index, vars->trav.bvh_base,
+ build_addr_to_node(b, rq_load_var(b, index, vars->accel_struct)), 1);
+ rq_store_var(b, index, vars->trav.origin, rq_load_var(b, index, vars->origin), 7);
+ rq_store_var(b, index, vars->trav.direction, rq_load_var(b, index, vars->direction), 7);
+ rq_store_var(b, index, vars->trav.inv_dir,
+ nir_fdiv(b, vec3ones, rq_load_var(b, index, vars->direction)), 7);
+ }
+ nir_pop_if(b, NULL);
+
+ rq_store_var(b, index, vars->trav.stack,
+ nir_isub(b, rq_load_var(b, index, vars->trav.stack), nir_imm_int(b, 1)), 1);
+
+ nir_ssa_def *bvh_node =
+ rq_load_array(b, index, vars->stack, rq_load_var(b, index, vars->trav.stack));
+ nir_ssa_def *bvh_node_type = bvh_node;
+
+ bvh_node =
+ nir_iadd(b, rq_load_var(b, index, vars->trav.bvh_base), nir_u2u(b, bvh_node, 64));
+ nir_ssa_def *intrinsic_result = NULL;
+ if (device->physical_device->rad_info.chip_class >= GFX10_3 &&
+ !(device->instance->perftest_flags & RADV_PERFTEST_FORCE_EMULATE_RT)) {
+ intrinsic_result = nir_bvh64_intersect_ray_amd(
+ b, 32, desc, nir_unpack_64_2x32(b, bvh_node), rq_load_var(b, index, vars->closest.t),
+ rq_load_var(b, index, vars->trav.origin),
+ rq_load_var(b, index, vars->trav.direction),
+ rq_load_var(b, index, vars->trav.inv_dir));
+ }
+
+ /* if (node.type_flags & aabb) */
+ nir_push_if(b,
+ nir_ine(b, nir_iand(b, bvh_node_type, nir_imm_int(b, 4)), nir_imm_int(b, 0)));
+ {
+ /* if (node.type_flags & leaf) */
+ nir_push_if(
+ b, nir_ine(b, nir_iand(b, bvh_node_type, nir_imm_int(b, 2)), nir_imm_int(b, 0)));
+ {
+ /* custom */
+ nir_push_if(
+ b, nir_ine(b, nir_iand(b, bvh_node_type, nir_imm_int(b, 1)), nir_imm_int(b, 0)));
+ {
+ insert_traversal_aabb_case(device, b, index, vars, bvh_node);
+ }
+ nir_push_else(b, NULL);
+ {
+ /* instance */
+ nir_ssa_def *instance_node_addr = build_node_to_addr(device, b, bvh_node);
+ nir_ssa_def *instance_data = nir_build_load_global(
+ b, 4, 32, instance_node_addr, .align_mul = 64, .align_offset = 0);
+ nir_ssa_def *instance_and_mask = nir_channel(b, instance_data, 2);
+ nir_ssa_def *instance_mask = nir_ushr(b, instance_and_mask, nir_imm_int(b, 24));
+
+ nir_push_if(
+ b,
+ nir_ieq(b, nir_iand(b, instance_mask, rq_load_var(b, index, vars->cull_mask)),
+ nir_imm_int(b, 0)));
+ {
+ nir_jump(b, nir_jump_continue);
+ }
+ nir_pop_if(b, NULL);
+
+ nir_ssa_def *wto_matrix[] = {
+ nir_build_load_global(b, 4, 32,
+ nir_iadd(b, instance_node_addr, nir_imm_int64(b, 16)),
+ .align_mul = 64, .align_offset = 16),
+ nir_build_load_global(b, 4, 32,
+ nir_iadd(b, instance_node_addr, nir_imm_int64(b, 32)),
+ .align_mul = 64, .align_offset = 32),
+ nir_build_load_global(b, 4, 32,
+ nir_iadd(b, instance_node_addr, nir_imm_int64(b, 48)),
+ .align_mul = 64, .align_offset = 48)};
+ nir_ssa_def *instance_id = nir_build_load_global(
+ b, 1, 32, nir_iadd(b, instance_node_addr, nir_imm_int64(b, 88)),
+ .align_mul = 4, .align_offset = 0);
+
+ rq_store_var(b, index, vars->trav.top_stack,
+ rq_load_var(b, index, vars->trav.stack), 1);
+ rq_store_var(b, index, vars->trav.bvh_base,
+ build_addr_to_node(
+ b, nir_pack_64_2x32(b, nir_channels(b, instance_data, 0x3))),
+ 1);
+
+ rq_store_array(b, index, vars->stack, rq_load_var(b, index, vars->trav.stack),
+ nir_iand(b, nir_channel(b, instance_data, 0), nir_imm_int(b, 63)),
+ 0x1);
+ rq_store_var(
+ b, index, vars->trav.stack,
+ nir_iadd(b, rq_load_var(b, index, vars->trav.stack), nir_imm_int(b, 1)), 1);
+
+ rq_store_var(b, index, vars->trav.origin,
+ nir_build_vec3_mat_mult_pre(b, rq_load_var(b, index, vars->origin),
+ wto_matrix),
+ 7);
+ rq_store_var(b, index, vars->trav.direction,
+ nir_build_vec3_mat_mult(b, rq_load_var(b, index, vars->direction),
+ wto_matrix, false),
+ 7);
+ rq_store_var(b, index, vars->trav.inv_dir,
+ nir_fdiv(b, vec3ones, rq_load_var(b, index, vars->trav.direction)),
+ 7);
+
+ rq_store_var(b, index, vars->candidate.sbt_offset_and_flags,
+ nir_channel(b, instance_data, 3), 1);
+ rq_store_var(b, index, vars->candidate.custom_instance_and_mask,
+ instance_and_mask, 1);
+ rq_store_var(b, index, vars->candidate.instance_id, instance_id, 1);
+ rq_store_var(b, index, vars->candidate.instance_addr, instance_node_addr, 1);
+ }
+ nir_pop_if(b, NULL);
+ }
+ nir_push_else(b, NULL);
+ {
+ nir_ssa_def *result = intrinsic_result;
+ if (!result) {
+ /* If we didn't run the intrinsic cause the hardware didn't support it,
+ * emulate ray/box intersection here */
+ result = intersect_ray_amd_software_box(
+ device, b, bvh_node, rq_load_var(b, index, vars->closest.t),
+ rq_load_var(b, index, vars->trav.origin),
+ rq_load_var(b, index, vars->trav.direction),
+ rq_load_var(b, index, vars->trav.inv_dir));
+ }
+
+ /* box */
+ for (unsigned i = 4; i-- > 0;) {
+ nir_ssa_def *new_node = nir_vector_extract(b, result, nir_imm_int(b, i));
+ nir_push_if(b, nir_ine(b, new_node, nir_imm_int(b, 0xffffffff)));
+ {
+ rq_store_array(b, index, vars->stack, rq_load_var(b, index, vars->trav.stack),
+ new_node, 0x1);
+ rq_store_var(
+ b, index, vars->trav.stack,
+ nir_iadd(b, rq_load_var(b, index, vars->trav.stack), nir_imm_int(b, 1)), 1);
+ }
+ nir_pop_if(b, NULL);
+ }
+ }
+ nir_pop_if(b, NULL);
+ }
+ nir_push_else(b, NULL);
+ {
+ nir_ssa_def *result = intrinsic_result;
+ if (!result) {
+ /* If we didn't run the intrinsic cause the hardware didn't support it,
+ * emulate ray/tri intersection here */
+ result = intersect_ray_amd_software_tri(device, b, bvh_node,
+ rq_load_var(b, index, vars->closest.t),
+ rq_load_var(b, index, vars->trav.origin),
+ rq_load_var(b, index, vars->trav.direction),
+ rq_load_var(b, index, vars->trav.inv_dir));
+ }
+ insert_traversal_triangle_case(device, b, index, result, vars, bvh_node);
+ }
+ nir_pop_if(b, NULL);
+ }
+ nir_pop_loop(b, NULL);
+ }
+ nir_pop_if(b, NULL);
+
+ return rq_load_var(b, index, vars->incomplete);
+}
+
+static void
+lower_rq_terminate(nir_builder *b, nir_ssa_def *index, nir_intrinsic_instr *instr,
+ struct ray_query_vars *vars)
+{
+ rq_store_var(b, index, vars->incomplete, nir_imm_bool(b, false), 0x1);
+}
+
+static bool
+is_rq_intrinsic(nir_intrinsic_op intrinsic)
+{
+ switch (intrinsic) {
+ case nir_intrinsic_rq_confirm_intersection:
+ case nir_intrinsic_rq_generate_intersection:
+ case nir_intrinsic_rq_initialize:
+ case nir_intrinsic_rq_load:
+ case nir_intrinsic_rq_proceed:
+ case nir_intrinsic_rq_terminate:
+ return true;
+ default:
+ return false;
+ }
+}
+
+bool
+radv_nir_lower_ray_queries(struct nir_shader *shader, struct radv_device *device)
+{
+ bool contains_ray_query = false;
+ struct hash_table *query_ht = _mesa_pointer_hash_table_create(NULL);
+
+ nir_foreach_variable_in_list (var, &shader->variables) {
+ if (!var->data.ray_query)
+ continue;
+
+ lower_ray_query(shader, NULL, var, query_ht);
+ contains_ray_query = true;
+ }
+
+ nir_foreach_function (function, shader) {
+ if (!function->impl)
+ continue;
+
+ nir_builder builder;
+ nir_builder_init(&builder, function->impl);
+
+ nir_foreach_variable_in_list (var, &function->impl->locals) {
+ if (!var->data.ray_query)
+ continue;
+
+ lower_ray_query(NULL, function->impl, var, query_ht);
+ contains_ray_query = true;
+ }
+
+ if (!contains_ray_query)
+ continue;
+
+ nir_foreach_block (block, function->impl) {
+ nir_foreach_instr_safe (instr, block) {
+ if (instr->type != nir_instr_type_intrinsic)
+ continue;
+
+ nir_intrinsic_instr *intrinsic = nir_instr_as_intrinsic(instr);
+
+ if (!is_rq_intrinsic(intrinsic->intrinsic))
+ continue;
+
+ nir_deref_instr *ray_query_deref =
+ nir_instr_as_deref(intrinsic->src[0].ssa->parent_instr);
+ nir_ssa_def *index = NULL;
+
+ if (ray_query_deref->deref_type == nir_deref_type_array) {
+ index = ray_query_deref->arr.index.ssa;
+ ray_query_deref = nir_instr_as_deref(ray_query_deref->parent.ssa->parent_instr);
+ }
+
+ assert(ray_query_deref->deref_type == nir_deref_type_var);
+
+ struct ray_query_vars *vars =
+ (struct ray_query_vars *)_mesa_hash_table_search(query_ht, ray_query_deref->var)
+ ->data;
+
+ builder.cursor = nir_before_instr(instr);
+
+ nir_ssa_def *new_dest = NULL;
+
+ switch (intrinsic->intrinsic) {
+ case nir_intrinsic_rq_confirm_intersection:
+ lower_rq_confirm_intersection(&builder, index, intrinsic, vars);
+ break;
+ case nir_intrinsic_rq_generate_intersection:
+ lower_rq_generate_intersection(&builder, index, intrinsic, vars);
+ break;
+ case nir_intrinsic_rq_initialize:
+ lower_rq_initialize(&builder, index, intrinsic, vars);
+ break;
+ case nir_intrinsic_rq_load:
+ new_dest = lower_rq_load(&builder, index, vars, intrinsic->src[1].ssa,
+ (nir_ray_query_value)nir_intrinsic_base(intrinsic),
+ nir_intrinsic_column(intrinsic));
+ break;
+ case nir_intrinsic_rq_proceed:
+ new_dest = lower_rq_proceed(&builder, index, vars, device);
+ break;
+ case nir_intrinsic_rq_terminate:
+ lower_rq_terminate(&builder, index, intrinsic, vars);
+ break;
+ default:
+ unreachable("Unsupported ray query intrinsic!");
+ }
+
+ if (new_dest)
+ nir_ssa_def_rewrite_uses(&intrinsic->dest.ssa, new_dest);
+
+ nir_instr_remove(instr);
+ nir_instr_free(instr);
+ }
+ }
+
+ nir_metadata_preserve(function->impl, nir_metadata_none);
+ }
+
+ ralloc_free(query_ht);
+
+ return contains_ray_query;
+}
projects / platform / upstream / mesa.git / commitdiff