return progress;
}
+static unsigned
+type_scalar_size_bytes(const struct glsl_type *type)
+{
+ assert(glsl_type_is_vector_or_scalar(type) ||
+ glsl_type_is_matrix(type));
+ return glsl_type_is_boolean(type) ? 4 : glsl_get_bit_size(type) / 8;
+}
+
+static nir_ssa_def *
+build_addr_iadd(nir_builder *b, nir_ssa_def *addr,
+ nir_address_format addr_format, nir_ssa_def *offset)
+{
+ assert(offset->num_components == 1);
+ assert(addr->bit_size == offset->bit_size);
+
+ switch (addr_format) {
+ case nir_address_format_vk_index_offset:
+ assert(addr->num_components == 2);
+ return nir_vec2(b, nir_channel(b, addr, 0),
+ nir_iadd(b, nir_channel(b, addr, 1), offset));
+ }
+ unreachable("Invalid address format");
+}
+
+static nir_ssa_def *
+build_addr_iadd_imm(nir_builder *b, nir_ssa_def *addr,
+ nir_address_format addr_format, int64_t offset)
+{
+ return build_addr_iadd(b, addr, addr_format,
+ nir_imm_intN_t(b, offset, addr->bit_size));
+}
+
+static nir_ssa_def *
+addr_to_index(nir_builder *b, nir_ssa_def *addr,
+ nir_address_format addr_format)
+{
+ assert(addr_format == nir_address_format_vk_index_offset);
+ assert(addr->num_components == 2);
+ return nir_channel(b, addr, 0);
+}
+
+static nir_ssa_def *
+addr_to_offset(nir_builder *b, nir_ssa_def *addr,
+ nir_address_format addr_format)
+{
+ assert(addr_format == nir_address_format_vk_index_offset);
+ assert(addr->num_components == 2);
+ return nir_channel(b, addr, 1);
+}
+
+static nir_ssa_def *
+build_explicit_io_load(nir_builder *b, nir_intrinsic_instr *intrin,
+ nir_ssa_def *addr, nir_address_format addr_format,
+ unsigned num_components)
+{
+ nir_variable_mode mode = nir_src_as_deref(intrin->src[0])->mode;
+
+ nir_intrinsic_op op;
+ switch (mode) {
+ case nir_var_ubo:
+ op = nir_intrinsic_load_ubo;
+ break;
+ case nir_var_ssbo:
+ op = nir_intrinsic_load_ssbo;
+ break;
+ default:
+ unreachable("Unsupported explicit IO variable mode");
+ }
+
+ nir_intrinsic_instr *load = nir_intrinsic_instr_create(b->shader, op);
+
+ load->src[0] = nir_src_for_ssa(addr_to_index(b, addr, addr_format));
+ load->src[1] = nir_src_for_ssa(addr_to_offset(b, addr, addr_format));
+
+ if (mode != nir_var_ubo)
+ nir_intrinsic_set_access(load, nir_intrinsic_access(intrin));
+
+ /* TODO: We should try and provide a better alignment. For OpenCL, we need
+ * to plumb the alignment through from SPIR-V when we have one.
+ */
+ nir_intrinsic_set_align(load, intrin->dest.ssa.bit_size / 8, 0);
+
+ assert(intrin->dest.is_ssa);
+ load->num_components = num_components;
+ nir_ssa_dest_init(&load->instr, &load->dest, num_components,
+ intrin->dest.ssa.bit_size, intrin->dest.ssa.name);
+ nir_builder_instr_insert(b, &load->instr);
+
+ return &load->dest.ssa;
+}
+
+static void
+build_explicit_io_store(nir_builder *b, nir_intrinsic_instr *intrin,
+ nir_ssa_def *addr, nir_address_format addr_format,
+ nir_ssa_def *value, nir_component_mask_t write_mask)
+{
+ nir_variable_mode mode = nir_src_as_deref(intrin->src[0])->mode;
+
+ nir_intrinsic_op op;
+ switch (mode) {
+ case nir_var_ssbo:
+ op = nir_intrinsic_store_ssbo;
+ break;
+ default:
+ unreachable("Unsupported explicit IO variable mode");
+ }
+
+ nir_intrinsic_instr *store = nir_intrinsic_instr_create(b->shader, op);
+
+ store->src[0] = nir_src_for_ssa(value);
+ store->src[1] = nir_src_for_ssa(addr_to_index(b, addr, addr_format));
+ store->src[2] = nir_src_for_ssa(addr_to_offset(b, addr, addr_format));
+
+ nir_intrinsic_set_write_mask(store, write_mask);
+
+ nir_intrinsic_set_access(store, nir_intrinsic_access(intrin));
+
+ /* TODO: We should try and provide a better alignment. For OpenCL, we need
+ * to plumb the alignment through from SPIR-V when we have one.
+ */
+ nir_intrinsic_set_align(store, value->bit_size / 8, 0);
+
+ assert(value->num_components == 1 ||
+ value->num_components == intrin->num_components);
+ store->num_components = value->num_components;
+ nir_builder_instr_insert(b, &store->instr);
+}
+
+static nir_ssa_def *
+build_explicit_io_atomic(nir_builder *b, nir_intrinsic_instr *intrin,
+ nir_ssa_def *addr, nir_address_format addr_format)
+{
+ nir_variable_mode mode = nir_src_as_deref(intrin->src[0])->mode;
+ const unsigned num_data_srcs =
+ nir_intrinsic_infos[intrin->intrinsic].num_srcs - 1;
+
+ nir_intrinsic_op op;
+ switch (mode) {
+ case nir_var_ssbo:
+ switch (intrin->intrinsic) {
+#define OP(O) case nir_intrinsic_deref_##O: op = nir_intrinsic_ssbo_##O; break;
+ OP(atomic_exchange)
+ OP(atomic_comp_swap)
+ OP(atomic_add)
+ OP(atomic_imin)
+ OP(atomic_umin)
+ OP(atomic_imax)
+ OP(atomic_umax)
+ OP(atomic_and)
+ OP(atomic_or)
+ OP(atomic_xor)
+ OP(atomic_fadd)
+ OP(atomic_fmin)
+ OP(atomic_fmax)
+ OP(atomic_fcomp_swap)
+#undef OP
+ default:
+ unreachable("Invalid SSBO atomic");
+ }
+ break;
+ default:
+ unreachable("Unsupported explicit IO variable mode");
+ }
+
+ nir_intrinsic_instr *atomic = nir_intrinsic_instr_create(b->shader, op);
+
+ atomic->src[0] = nir_src_for_ssa(addr_to_index(b, addr, addr_format));
+ atomic->src[1] = nir_src_for_ssa(addr_to_offset(b, addr, addr_format));
+ for (unsigned i = 0; i < num_data_srcs; i++) {
+ assert(intrin->src[1 + i].is_ssa);
+ atomic->src[2 + i] = nir_src_for_ssa(intrin->src[1 + i].ssa);
+ }
+
+ assert(intrin->dest.ssa.num_components == 1);
+ nir_ssa_dest_init(&atomic->instr, &atomic->dest,
+ 1, intrin->dest.ssa.bit_size, intrin->dest.ssa.name);
+ nir_builder_instr_insert(b, &atomic->instr);
+
+ return &atomic->dest.ssa;
+}
+
+static void
+lower_explicit_io_deref(nir_builder *b, nir_deref_instr *deref,
+ nir_address_format addr_format)
+{
+ /* Just delete the deref if it's not used. We can't use
+ * nir_deref_instr_remove_if_unused here because it may remove more than
+ * one deref which could break our list walking since we walk the list
+ * backwards.
+ */
+ assert(list_empty(&deref->dest.ssa.if_uses));
+ if (list_empty(&deref->dest.ssa.uses)) {
+ nir_instr_remove(&deref->instr);
+ return;
+ }
+
+ b->cursor = nir_after_instr(&deref->instr);
+
+ /* Var derefs must be lowered away by the driver */
+ assert(deref->deref_type != nir_deref_type_var);
+
+ assert(deref->parent.is_ssa);
+ nir_ssa_def *parent_addr = deref->parent.ssa;
+
+ nir_ssa_def *addr;
+ assert(deref->dest.is_ssa);
+ switch (deref->deref_type) {
+ case nir_deref_type_var:
+ unreachable("Must be lowered by the driver");
+ break;
+
+ case nir_deref_type_array: {
+ nir_deref_instr *parent = nir_deref_instr_parent(deref);
+
+ unsigned stride = glsl_get_explicit_stride(parent->type);
+ if ((glsl_type_is_matrix(parent->type) &&
+ glsl_matrix_type_is_row_major(parent->type)) ||
+ (glsl_type_is_vector(parent->type) && stride == 0))
+ stride = type_scalar_size_bytes(parent->type);
+
+ assert(stride > 0);
+
+ nir_ssa_def *index = nir_ssa_for_src(b, deref->arr.index, 1);
+ index = nir_i2i(b, index, parent_addr->bit_size);
+ addr = build_addr_iadd(b, parent_addr, addr_format,
+ nir_imul_imm(b, index, stride));
+ break;
+ }
+
+ case nir_deref_type_ptr_as_array: {
+ nir_ssa_def *index = nir_ssa_for_src(b, deref->arr.index, 1);
+ index = nir_i2i(b, index, parent_addr->bit_size);
+ unsigned stride = nir_deref_instr_ptr_as_array_stride(deref);
+ addr = build_addr_iadd(b, parent_addr, addr_format,
+ nir_imul_imm(b, index, stride));
+ break;
+ }
+
+ case nir_deref_type_array_wildcard:
+ unreachable("Wildcards should be lowered by now");
+ break;
+
+ case nir_deref_type_struct: {
+ nir_deref_instr *parent = nir_deref_instr_parent(deref);
+ int offset = glsl_get_struct_field_offset(parent->type,
+ deref->strct.index);
+ assert(offset >= 0);
+ addr = build_addr_iadd_imm(b, parent_addr, addr_format, offset);
+ break;
+ }
+
+ case nir_deref_type_cast:
+ /* Nothing to do here */
+ addr = parent_addr;
+ break;
+ }
+
+ nir_instr_remove(&deref->instr);
+ nir_ssa_def_rewrite_uses(&deref->dest.ssa, nir_src_for_ssa(addr));
+}
+
+static void
+lower_explicit_io_access(nir_builder *b, nir_intrinsic_instr *intrin,
+ nir_address_format addr_format)
+{
+ b->cursor = nir_after_instr(&intrin->instr);
+
+ nir_deref_instr *deref = nir_src_as_deref(intrin->src[0]);
+ unsigned vec_stride = glsl_get_explicit_stride(deref->type);
+ unsigned scalar_size = type_scalar_size_bytes(deref->type);
+ assert(vec_stride == 0 || glsl_type_is_vector(deref->type));
+ assert(vec_stride == 0 || vec_stride >= scalar_size);
+
+ nir_ssa_def *addr = &deref->dest.ssa;
+ if (intrin->intrinsic == nir_intrinsic_load_deref) {
+ nir_ssa_def *value;
+ if (vec_stride > scalar_size) {
+ nir_ssa_def *comps[4] = { NULL, };
+ for (unsigned i = 0; i < intrin->num_components; i++) {
+ nir_ssa_def *comp_addr = build_addr_iadd_imm(b, addr, addr_format,
+ vec_stride * i);
+ comps[i] = build_explicit_io_load(b, intrin, comp_addr,
+ addr_format, 1);
+ }
+ value = nir_vec(b, comps, intrin->num_components);
+ } else {
+ value = build_explicit_io_load(b, intrin, addr, addr_format,
+ intrin->num_components);
+ }
+ nir_ssa_def_rewrite_uses(&intrin->dest.ssa, nir_src_for_ssa(value));
+ } else if (intrin->intrinsic == nir_intrinsic_store_deref) {
+ assert(intrin->src[1].is_ssa);
+ nir_ssa_def *value = intrin->src[1].ssa;
+ nir_component_mask_t write_mask = nir_intrinsic_write_mask(intrin);
+ if (vec_stride > scalar_size) {
+ for (unsigned i = 0; i < intrin->num_components; i++) {
+ if (!(write_mask & (1 << i)))
+ continue;
+
+ nir_ssa_def *comp_addr = build_addr_iadd_imm(b, addr, addr_format,
+ vec_stride * i);
+ build_explicit_io_store(b, intrin, comp_addr, addr_format,
+ nir_channel(b, value, i), 1);
+ }
+ } else {
+ build_explicit_io_store(b, intrin, addr, addr_format,
+ value, write_mask);
+ }
+ } else {
+ nir_ssa_def *value =
+ build_explicit_io_atomic(b, intrin, addr, addr_format);
+ nir_ssa_def_rewrite_uses(&intrin->dest.ssa, nir_src_for_ssa(value));
+ }
+
+ nir_instr_remove(&intrin->instr);
+}
+
+static bool
+nir_lower_explicit_io_impl(nir_function_impl *impl, nir_variable_mode modes,
+ nir_address_format addr_format)
+{
+ bool progress = false;
+
+ nir_builder b;
+ nir_builder_init(&b, impl);
+
+ /* Walk in reverse order so that we can see the full deref chain when we
+ * lower the access operations. We lower them assuming that the derefs
+ * will be turned into address calculations later.
+ */
+ nir_foreach_block_reverse(block, impl) {
+ nir_foreach_instr_reverse_safe(instr, block) {
+ switch (instr->type) {
+ case nir_instr_type_deref: {
+ nir_deref_instr *deref = nir_instr_as_deref(instr);
+ if (deref->mode & modes) {
+ lower_explicit_io_deref(&b, deref, addr_format);
+ progress = true;
+ }
+ break;
+ }
+
+ case nir_instr_type_intrinsic: {
+ nir_intrinsic_instr *intrin = nir_instr_as_intrinsic(instr);
+ switch (intrin->intrinsic) {
+ case nir_intrinsic_load_deref:
+ case nir_intrinsic_store_deref:
+ case nir_intrinsic_deref_atomic_add:
+ case nir_intrinsic_deref_atomic_imin:
+ case nir_intrinsic_deref_atomic_umin:
+ case nir_intrinsic_deref_atomic_imax:
+ case nir_intrinsic_deref_atomic_umax:
+ case nir_intrinsic_deref_atomic_and:
+ case nir_intrinsic_deref_atomic_or:
+ case nir_intrinsic_deref_atomic_xor:
+ case nir_intrinsic_deref_atomic_exchange:
+ case nir_intrinsic_deref_atomic_comp_swap:
+ case nir_intrinsic_deref_atomic_fadd:
+ case nir_intrinsic_deref_atomic_fmin:
+ case nir_intrinsic_deref_atomic_fmax:
+ case nir_intrinsic_deref_atomic_fcomp_swap: {
+ nir_deref_instr *deref = nir_src_as_deref(intrin->src[0]);
+ if (deref->mode & modes) {
+ lower_explicit_io_access(&b, intrin, addr_format);
+ progress = true;
+ }
+ break;
+ }
+
+ default:
+ break;
+ }
+ break;
+ }
+
+ default:
+ /* Nothing to do */
+ break;
+ }
+ }
+ }
+
+ if (progress) {
+ nir_metadata_preserve(impl, nir_metadata_block_index |
+ nir_metadata_dominance);
+ }
+
+ return progress;
+}
+
+bool
+nir_lower_explicit_io(nir_shader *shader, nir_variable_mode modes,
+ nir_address_format addr_format)
+{
+ bool progress = false;
+
+ nir_foreach_function(function, shader) {
+ if (function->impl &&
+ nir_lower_explicit_io_impl(function->impl, modes, addr_format))
+ progress = true;
+ }
+
+ return progress;
+}
+
/**
* Return the offset source for a load/store intrinsic.
*/
projects / mesa.git / commitdiff