#include "nir.h"
#include "nir_builder.h"
+#include "nir_deref.h"
+
+#include "util/u_math.h"
struct lower_io_state {
+ void *dead_ctx;
nir_builder builder;
- void *mem_ctx;
- int (*type_size)(const struct glsl_type *type);
+ int (*type_size)(const struct glsl_type *type, bool);
nir_variable_mode modes;
+ nir_lower_io_options options;
};
-void
-nir_assign_var_locations(struct exec_list *var_list, unsigned *size,
- unsigned base_offset,
- int (*type_size)(const struct glsl_type *))
+static nir_intrinsic_op
+ssbo_atomic_for_deref(nir_intrinsic_op deref_op)
{
- unsigned location = 0;
+ switch (deref_op) {
+#define OP(O) case nir_intrinsic_deref_##O: return nir_intrinsic_ssbo_##O;
+ 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");
+ }
+}
- /* There are 32 regular and 32 patch varyings allowed */
- int locations[64][2];
- for (unsigned i = 0; i < 64; i++) {
- for (unsigned j = 0; j < 2; j++)
- locations[i][j] = -1;
+static nir_intrinsic_op
+global_atomic_for_deref(nir_intrinsic_op deref_op)
+{
+ switch (deref_op) {
+#define OP(O) case nir_intrinsic_deref_##O: return nir_intrinsic_global_##O;
+ 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");
}
+}
- nir_foreach_variable(var, var_list) {
- /*
- * UBO's have their own address spaces, so don't count them towards the
- * number of global uniforms
- */
- if ((var->data.mode == nir_var_uniform || var->data.mode == nir_var_shader_storage) &&
- var->interface_type != NULL)
- continue;
+static nir_intrinsic_op
+shared_atomic_for_deref(nir_intrinsic_op deref_op)
+{
+ switch (deref_op) {
+#define OP(O) case nir_intrinsic_deref_##O: return nir_intrinsic_shared_##O;
+ 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 shared atomic");
+ }
+}
- /* Make sure we give the same location to varyings packed with
- * ARB_enhanced_layouts.
- */
- int idx = var->data.location - base_offset;
- if (base_offset && idx >= 0) {
- assert(idx < ARRAY_SIZE(locations));
-
- if (locations[idx][var->data.index] == -1) {
- var->data.driver_location = location;
- locations[idx][var->data.index] = location;
-
- /* A dvec3 can be packed with a double we need special handling
- * for this as we are packing across two locations.
- */
- if (glsl_get_base_type(var->type) == GLSL_TYPE_DOUBLE &&
- glsl_get_vector_elements(var->type) == 3) {
- /* Hack around type_size functions that expect vectors to be
- * padded out to vec4. If a float type is the same size as a
- * double then the type size is padded to vec4, otherwise
- * set the offset to two doubles which offsets the location
- * past the first two components in dvec3 which were stored at
- * the previous location.
- */
- unsigned dsize = type_size(glsl_double_type());
- unsigned offset =
- dsize == type_size(glsl_float_type()) ? dsize : dsize * 2;
-
- locations[idx + 1][var->data.index] = location + offset;
- }
+void
+nir_assign_var_locations(nir_shader *shader, nir_variable_mode mode,
+ unsigned *size,
+ int (*type_size)(const struct glsl_type *, bool))
+{
+ unsigned location = 0;
- location += type_size(var->type);
- } else {
- var->data.driver_location = locations[idx][var->data.index];
- }
- } else {
- var->data.driver_location = location;
- location += type_size(var->type);
- }
+ nir_foreach_variable_with_modes(var, shader, mode) {
+ var->data.driver_location = location;
+ bool bindless_type_size = var->data.mode == nir_var_shader_in ||
+ var->data.mode == nir_var_shader_out ||
+ var->data.bindless;
+ location += type_size(var->type, bindless_type_size);
}
*size = location;
}
/**
- * Returns true if we're processing a stage whose inputs are arrays indexed
- * by a vertex number (such as geometry shader inputs).
+ * Return true if the given variable is a per-vertex input/output array.
+ * (such as geometry shader inputs).
*/
-static bool
-is_per_vertex_input(struct lower_io_state *state, nir_variable *var)
+bool
+nir_is_per_vertex_io(const nir_variable *var, gl_shader_stage stage)
{
- gl_shader_stage stage = state->builder.shader->stage;
+ if (var->data.patch || !glsl_type_is_array(var->type))
+ return false;
+
+ if (var->data.mode == nir_var_shader_in)
+ return stage == MESA_SHADER_GEOMETRY ||
+ stage == MESA_SHADER_TESS_CTRL ||
+ stage == MESA_SHADER_TESS_EVAL;
+
+ if (var->data.mode == nir_var_shader_out)
+ return stage == MESA_SHADER_TESS_CTRL;
- return var->data.mode == nir_var_shader_in && !var->data.patch &&
- (stage == MESA_SHADER_TESS_CTRL ||
- stage == MESA_SHADER_TESS_EVAL ||
- stage == MESA_SHADER_GEOMETRY);
+ return false;
}
-static bool
-is_per_vertex_output(struct lower_io_state *state, nir_variable *var)
+static unsigned get_number_of_slots(struct lower_io_state *state,
+ const nir_variable *var)
{
- gl_shader_stage stage = state->builder.shader->stage;
- return var->data.mode == nir_var_shader_out && !var->data.patch &&
- stage == MESA_SHADER_TESS_CTRL;
+ const struct glsl_type *type = var->type;
+
+ if (nir_is_per_vertex_io(var, state->builder.shader->info.stage)) {
+ assert(glsl_type_is_array(type));
+ type = glsl_get_array_element(type);
+ }
+
+ return state->type_size(type, var->data.bindless);
}
static nir_ssa_def *
-get_io_offset(nir_builder *b, nir_deref_var *deref,
+get_io_offset(nir_builder *b, nir_deref_instr *deref,
nir_ssa_def **vertex_index,
- int (*type_size)(const struct glsl_type *))
+ int (*type_size)(const struct glsl_type *, bool),
+ unsigned *component, bool bts)
{
- nir_deref *tail = &deref->deref;
+ nir_deref_path path;
+ nir_deref_path_init(&path, deref, NULL);
+
+ assert(path.path[0]->deref_type == nir_deref_type_var);
+ nir_deref_instr **p = &path.path[1];
/* For per-vertex input arrays (i.e. geometry shader inputs), keep the
* outermost array index separate. Process the rest normally.
*/
if (vertex_index != NULL) {
- tail = tail->child;
- assert(tail->deref_type == nir_deref_type_array);
- nir_deref_array *deref_array = nir_deref_as_array(tail);
+ assert((*p)->deref_type == nir_deref_type_array);
+ *vertex_index = nir_ssa_for_src(b, (*p)->arr.index, 1);
+ p++;
+ }
- nir_ssa_def *vtx = nir_imm_int(b, deref_array->base_offset);
- if (deref_array->deref_array_type == nir_deref_array_type_indirect) {
- vtx = nir_iadd(b, vtx, nir_ssa_for_src(b, deref_array->indirect, 1));
- }
- *vertex_index = vtx;
+ if (path.path[0]->var->data.compact) {
+ assert((*p)->deref_type == nir_deref_type_array);
+ assert(glsl_type_is_scalar((*p)->type));
+
+ /* We always lower indirect dereferences for "compact" array vars. */
+ const unsigned index = nir_src_as_uint((*p)->arr.index);
+ const unsigned total_offset = *component + index;
+ const unsigned slot_offset = total_offset / 4;
+ *component = total_offset % 4;
+ return nir_imm_int(b, type_size(glsl_vec4_type(), bts) * slot_offset);
}
/* Just emit code and let constant-folding go to town */
nir_ssa_def *offset = nir_imm_int(b, 0);
- while (tail->child != NULL) {
- const struct glsl_type *parent_type = tail->type;
- tail = tail->child;
+ for (; *p; p++) {
+ if ((*p)->deref_type == nir_deref_type_array) {
+ unsigned size = type_size((*p)->type, bts);
- if (tail->deref_type == nir_deref_type_array) {
- nir_deref_array *deref_array = nir_deref_as_array(tail);
- unsigned size = type_size(tail->type);
+ nir_ssa_def *mul =
+ nir_amul_imm(b, nir_ssa_for_src(b, (*p)->arr.index, 1), size);
- offset = nir_iadd(b, offset,
- nir_imm_int(b, size * deref_array->base_offset));
-
- if (deref_array->deref_array_type == nir_deref_array_type_indirect) {
- nir_ssa_def *mul =
- nir_imul(b, nir_imm_int(b, size),
- nir_ssa_for_src(b, deref_array->indirect, 1));
-
- offset = nir_iadd(b, offset, mul);
- }
- } else if (tail->deref_type == nir_deref_type_struct) {
- nir_deref_struct *deref_struct = nir_deref_as_struct(tail);
+ offset = nir_iadd(b, offset, mul);
+ } else if ((*p)->deref_type == nir_deref_type_struct) {
+ /* p starts at path[1], so this is safe */
+ nir_deref_instr *parent = *(p - 1);
unsigned field_offset = 0;
- for (unsigned i = 0; i < deref_struct->index; i++) {
- field_offset += type_size(glsl_get_struct_field(parent_type, i));
+ for (unsigned i = 0; i < (*p)->strct.index; i++) {
+ field_offset += type_size(glsl_get_struct_field(parent->type, i), bts);
}
- offset = nir_iadd(b, offset, nir_imm_int(b, field_offset));
+ offset = nir_iadd_imm(b, offset, field_offset);
+ } else {
+ unreachable("Unsupported deref type");
}
}
+ nir_deref_path_finish(&path);
+
return offset;
}
-static nir_intrinsic_instr *
-lower_load(nir_intrinsic_instr *intrin, struct lower_io_state *state,
- nir_ssa_def *vertex_index, nir_ssa_def *offset)
+static nir_ssa_def *
+emit_load(struct lower_io_state *state,
+ nir_ssa_def *vertex_index, nir_variable *var, nir_ssa_def *offset,
+ unsigned component, unsigned num_components, unsigned bit_size,
+ nir_alu_type type)
{
- const nir_shader *nir = state->builder.shader;
- nir_variable *var = intrin->variables[0]->var;
+ nir_builder *b = &state->builder;
+ const nir_shader *nir = b->shader;
nir_variable_mode mode = var->data.mode;
nir_ssa_def *barycentric = NULL;
nir_intrinsic_op op;
switch (mode) {
case nir_var_shader_in:
- if (nir->stage == MESA_SHADER_FRAGMENT &&
+ if (nir->info.stage == MESA_SHADER_FRAGMENT &&
nir->options->use_interpolated_input_intrinsics &&
var->data.interpolation != INTERP_MODE_FLAT) {
- assert(vertex_index == NULL);
-
- nir_intrinsic_op bary_op;
- if (var->data.sample)
- bary_op = nir_intrinsic_load_barycentric_sample;
- else if (var->data.centroid)
- bary_op = nir_intrinsic_load_barycentric_centroid;
- else
- bary_op = nir_intrinsic_load_barycentric_pixel;
-
- barycentric = nir_load_barycentric(&state->builder, bary_op,
- var->data.interpolation);
- op = nir_intrinsic_load_interpolated_input;
+ if (var->data.interpolation == INTERP_MODE_EXPLICIT) {
+ assert(vertex_index != NULL);
+ op = nir_intrinsic_load_input_vertex;
+ } else {
+ assert(vertex_index == NULL);
+
+ nir_intrinsic_op bary_op;
+ if (var->data.sample ||
+ (state->options & nir_lower_io_force_sample_interpolation))
+ bary_op = nir_intrinsic_load_barycentric_sample;
+ else if (var->data.centroid)
+ bary_op = nir_intrinsic_load_barycentric_centroid;
+ else
+ bary_op = nir_intrinsic_load_barycentric_pixel;
+
+ barycentric = nir_load_barycentric(&state->builder, bary_op,
+ var->data.interpolation);
+ op = nir_intrinsic_load_interpolated_input;
+ }
} else {
op = vertex_index ? nir_intrinsic_load_per_vertex_input :
nir_intrinsic_load_input;
case nir_var_uniform:
op = nir_intrinsic_load_uniform;
break;
- case nir_var_shared:
- op = nir_intrinsic_load_shared;
- break;
default:
unreachable("Unknown variable mode");
}
- nir_intrinsic_instr *load = nir_intrinsic_instr_create(state->mem_ctx, op);
- load->num_components = intrin->num_components;
+ nir_intrinsic_instr *load =
+ nir_intrinsic_instr_create(state->builder.shader, op);
+ load->num_components = num_components;
nir_intrinsic_set_base(load, var->data.driver_location);
if (mode == nir_var_shader_in || mode == nir_var_shader_out)
- nir_intrinsic_set_component(load, var->data.location_frac);
+ nir_intrinsic_set_component(load, component);
if (load->intrinsic == nir_intrinsic_load_uniform)
- nir_intrinsic_set_range(load, state->type_size(var->type));
+ nir_intrinsic_set_range(load,
+ state->type_size(var->type, var->data.bindless));
+
+ if (load->intrinsic == nir_intrinsic_load_input ||
+ load->intrinsic == nir_intrinsic_load_input_vertex ||
+ load->intrinsic == nir_intrinsic_load_uniform)
+ nir_intrinsic_set_type(load, type);
+
+ if (load->intrinsic != nir_intrinsic_load_uniform) {
+ nir_io_semantics semantics = {0};
+ semantics.location = var->data.location;
+ semantics.num_slots = get_number_of_slots(state, var);
+ semantics.fb_fetch_output = var->data.fb_fetch_output;
+ nir_intrinsic_set_io_semantics(load, semantics);
+ }
if (vertex_index) {
load->src[0] = nir_src_for_ssa(vertex_index);
load->src[0] = nir_src_for_ssa(offset);
}
- return load;
+ nir_ssa_dest_init(&load->instr, &load->dest,
+ num_components, bit_size, NULL);
+ nir_builder_instr_insert(b, &load->instr);
+
+ return &load->dest.ssa;
}
-static nir_intrinsic_instr *
-lower_store(nir_intrinsic_instr *intrin, struct lower_io_state *state,
- nir_ssa_def *vertex_index, nir_ssa_def *offset)
+static nir_ssa_def *
+lower_load(nir_intrinsic_instr *intrin, struct lower_io_state *state,
+ nir_ssa_def *vertex_index, nir_variable *var, nir_ssa_def *offset,
+ unsigned component, const struct glsl_type *type)
{
- nir_variable *var = intrin->variables[0]->var;
- nir_variable_mode mode = var->data.mode;
+ assert(intrin->dest.is_ssa);
+ if (intrin->dest.ssa.bit_size == 64 &&
+ (state->options & nir_lower_io_lower_64bit_to_32)) {
+ nir_builder *b = &state->builder;
+
+ const unsigned slot_size = state->type_size(glsl_dvec_type(2), false);
+
+ nir_ssa_def *comp64[4];
+ assert(component == 0 || component == 2);
+ unsigned dest_comp = 0;
+ while (dest_comp < intrin->dest.ssa.num_components) {
+ const unsigned num_comps =
+ MIN2(intrin->dest.ssa.num_components - dest_comp,
+ (4 - component) / 2);
+
+ nir_ssa_def *data32 =
+ emit_load(state, vertex_index, var, offset, component,
+ num_comps * 2, 32, nir_type_uint32);
+ for (unsigned i = 0; i < num_comps; i++) {
+ comp64[dest_comp + i] =
+ nir_pack_64_2x32(b, nir_channels(b, data32, 3 << (i * 2)));
+ }
- nir_intrinsic_op op;
- if (mode == nir_var_shared) {
- op = nir_intrinsic_store_shared;
+ /* Only the first store has a component offset */
+ component = 0;
+ dest_comp += num_comps;
+ offset = nir_iadd_imm(b, offset, slot_size);
+ }
+
+ return nir_vec(b, comp64, intrin->dest.ssa.num_components);
+ } else if (intrin->dest.ssa.bit_size == 1) {
+ /* Booleans are 32-bit */
+ assert(glsl_type_is_boolean(type));
+ return nir_b2b1(&state->builder,
+ emit_load(state, vertex_index, var, offset, component,
+ intrin->dest.ssa.num_components, 32,
+ nir_type_bool32));
} else {
- assert(mode == nir_var_shader_out);
- op = vertex_index ? nir_intrinsic_store_per_vertex_output :
- nir_intrinsic_store_output;
+ return emit_load(state, vertex_index, var, offset, component,
+ intrin->dest.ssa.num_components,
+ intrin->dest.ssa.bit_size,
+ nir_get_nir_type_for_glsl_type(type));
}
+}
- nir_intrinsic_instr *store = nir_intrinsic_instr_create(state->mem_ctx, op);
- store->num_components = intrin->num_components;
+static void
+emit_store(struct lower_io_state *state, nir_ssa_def *data,
+ nir_ssa_def *vertex_index, nir_variable *var, nir_ssa_def *offset,
+ unsigned component, unsigned num_components,
+ nir_component_mask_t write_mask, nir_alu_type type)
+{
+ nir_builder *b = &state->builder;
+ nir_variable_mode mode = var->data.mode;
- nir_src_copy(&store->src[0], &intrin->src[0], store);
+ assert(mode == nir_var_shader_out);
+ nir_intrinsic_op op;
+ op = vertex_index ? nir_intrinsic_store_per_vertex_output :
+ nir_intrinsic_store_output;
+
+ nir_intrinsic_instr *store =
+ nir_intrinsic_instr_create(state->builder.shader, op);
+ store->num_components = num_components;
+
+ store->src[0] = nir_src_for_ssa(data);
nir_intrinsic_set_base(store, var->data.driver_location);
if (mode == nir_var_shader_out)
- nir_intrinsic_set_component(store, var->data.location_frac);
+ nir_intrinsic_set_component(store, component);
+
+ if (store->intrinsic == nir_intrinsic_store_output)
+ nir_intrinsic_set_type(store, type);
- nir_intrinsic_set_write_mask(store, nir_intrinsic_write_mask(intrin));
+ nir_intrinsic_set_write_mask(store, write_mask);
if (vertex_index)
store->src[1] = nir_src_for_ssa(vertex_index);
store->src[vertex_index ? 2 : 1] = nir_src_for_ssa(offset);
- return store;
-}
-
-static nir_intrinsic_instr *
-lower_atomic(nir_intrinsic_instr *intrin, struct lower_io_state *state,
- nir_ssa_def *offset)
-{
- nir_variable *var = intrin->variables[0]->var;
+ unsigned gs_streams = 0;
+ if (state->builder.shader->info.stage == MESA_SHADER_GEOMETRY) {
+ if (var->data.stream & NIR_STREAM_PACKED) {
+ gs_streams = var->data.stream & ~NIR_STREAM_PACKED;
+ } else {
+ assert(var->data.stream < 4);
+ gs_streams = 0;
+ for (unsigned i = 0; i < num_components; ++i)
+ gs_streams |= var->data.stream << (2 * i);
+ }
+ }
- assert(var->data.mode == nir_var_shared);
+ nir_io_semantics semantics = {0};
+ semantics.location = var->data.location;
+ semantics.num_slots = get_number_of_slots(state, var);
+ semantics.dual_source_blend_index = var->data.index;
+ semantics.gs_streams = gs_streams;
+ nir_intrinsic_set_io_semantics(store, semantics);
- nir_intrinsic_op op;
- switch (intrin->intrinsic) {
-#define OP(O) case nir_intrinsic_var_##O: op = nir_intrinsic_shared_##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)
-#undef OP
- default:
- unreachable("Invalid atomic");
- }
+ nir_builder_instr_insert(b, &store->instr);
+}
- nir_intrinsic_instr *atomic =
- nir_intrinsic_instr_create(state->mem_ctx, op);
+static void
+lower_store(nir_intrinsic_instr *intrin, struct lower_io_state *state,
+ nir_ssa_def *vertex_index, nir_variable *var, nir_ssa_def *offset,
+ unsigned component, const struct glsl_type *type)
+{
+ assert(intrin->src[1].is_ssa);
+ if (intrin->src[1].ssa->bit_size == 64 &&
+ (state->options & nir_lower_io_lower_64bit_to_32)) {
+ nir_builder *b = &state->builder;
+
+ const unsigned slot_size = state->type_size(glsl_dvec_type(2), false);
+
+ assert(component == 0 || component == 2);
+ unsigned src_comp = 0;
+ nir_component_mask_t write_mask = nir_intrinsic_write_mask(intrin);
+ while (src_comp < intrin->num_components) {
+ const unsigned num_comps =
+ MIN2(intrin->num_components - src_comp,
+ (4 - component) / 2);
+
+ if (write_mask & BITFIELD_MASK(num_comps)) {
+ nir_ssa_def *data =
+ nir_channels(b, intrin->src[1].ssa,
+ BITFIELD_RANGE(src_comp, num_comps));
+ nir_ssa_def *data32 = nir_bitcast_vector(b, data, 32);
+
+ nir_component_mask_t write_mask32 = 0;
+ for (unsigned i = 0; i < num_comps; i++) {
+ if (write_mask & BITFIELD_MASK(num_comps) & (1 << i))
+ write_mask32 |= 3 << (i * 2);
+ }
- nir_intrinsic_set_base(atomic, var->data.driver_location);
+ emit_store(state, data32, vertex_index, var, offset,
+ component, data32->num_components, write_mask32,
+ nir_type_uint32);
+ }
- atomic->src[0] = nir_src_for_ssa(offset);
- for (unsigned i = 0; i < nir_op_infos[intrin->intrinsic].num_inputs; i++) {
- nir_src_copy(&atomic->src[i+1], &intrin->src[i], atomic);
+ /* Only the first store has a component offset */
+ component = 0;
+ src_comp += num_comps;
+ write_mask >>= num_comps;
+ offset = nir_iadd_imm(b, offset, slot_size);
+ }
+ } else if (intrin->dest.ssa.bit_size == 1) {
+ /* Booleans are 32-bit */
+ assert(glsl_type_is_boolean(type));
+ nir_ssa_def *b32_val = nir_b2b32(&state->builder, intrin->src[1].ssa);
+ emit_store(state, b32_val, vertex_index, var, offset,
+ component, intrin->num_components,
+ nir_intrinsic_write_mask(intrin),
+ nir_type_bool32);
+ } else {
+ emit_store(state, intrin->src[1].ssa, vertex_index, var, offset,
+ component, intrin->num_components,
+ nir_intrinsic_write_mask(intrin),
+ nir_get_nir_type_for_glsl_type(type));
}
-
- return atomic;
}
-static nir_intrinsic_instr *
+static nir_ssa_def *
lower_interpolate_at(nir_intrinsic_instr *intrin, struct lower_io_state *state,
- nir_ssa_def *offset)
+ nir_variable *var, nir_ssa_def *offset, unsigned component,
+ const struct glsl_type *type)
{
- nir_variable *var = intrin->variables[0]->var;
-
+ nir_builder *b = &state->builder;
assert(var->data.mode == nir_var_shader_in);
- /* Ignore interpolateAt() for flat variables - flat is flat. */
- if (var->data.interpolation == INTERP_MODE_FLAT)
- return lower_load(intrin, state, NULL, offset);
+ /* Ignore interpolateAt() for flat variables - flat is flat. Lower
+ * interpolateAtVertex() for explicit variables.
+ */
+ if (var->data.interpolation == INTERP_MODE_FLAT ||
+ var->data.interpolation == INTERP_MODE_EXPLICIT) {
+ nir_ssa_def *vertex_index = NULL;
+
+ if (var->data.interpolation == INTERP_MODE_EXPLICIT) {
+ assert(intrin->intrinsic == nir_intrinsic_interp_deref_at_vertex);
+ vertex_index = intrin->src[1].ssa;
+ }
+
+ return lower_load(intrin, state, vertex_index, var, offset, component, type);
+ }
+
+ /* None of the supported APIs allow interpolation on 64-bit things */
+ assert(intrin->dest.is_ssa && intrin->dest.ssa.bit_size <= 32);
nir_intrinsic_op bary_op;
switch (intrin->intrinsic) {
- case nir_intrinsic_interp_var_at_centroid:
- bary_op = nir_intrinsic_load_barycentric_centroid;
+ case nir_intrinsic_interp_deref_at_centroid:
+ bary_op = (state->options & nir_lower_io_force_sample_interpolation) ?
+ nir_intrinsic_load_barycentric_sample :
+ nir_intrinsic_load_barycentric_centroid;
break;
- case nir_intrinsic_interp_var_at_sample:
+ case nir_intrinsic_interp_deref_at_sample:
bary_op = nir_intrinsic_load_barycentric_at_sample;
break;
- case nir_intrinsic_interp_var_at_offset:
+ case nir_intrinsic_interp_deref_at_offset:
bary_op = nir_intrinsic_load_barycentric_at_offset;
break;
default:
}
nir_intrinsic_instr *bary_setup =
- nir_intrinsic_instr_create(state->mem_ctx, bary_op);
+ nir_intrinsic_instr_create(state->builder.shader, bary_op);
nir_ssa_dest_init(&bary_setup->instr, &bary_setup->dest, 2, 32, NULL);
nir_intrinsic_set_interp_mode(bary_setup, var->data.interpolation);
- if (intrin->intrinsic != nir_intrinsic_interp_var_at_centroid)
- nir_src_copy(&bary_setup->src[0], &intrin->src[0], bary_setup);
+ if (intrin->intrinsic == nir_intrinsic_interp_deref_at_sample ||
+ intrin->intrinsic == nir_intrinsic_interp_deref_at_offset ||
+ intrin->intrinsic == nir_intrinsic_interp_deref_at_vertex)
+ nir_src_copy(&bary_setup->src[0], &intrin->src[1], bary_setup);
- nir_builder_instr_insert(&state->builder, &bary_setup->instr);
+ nir_builder_instr_insert(b, &bary_setup->instr);
nir_intrinsic_instr *load =
- nir_intrinsic_instr_create(state->mem_ctx,
+ nir_intrinsic_instr_create(state->builder.shader,
nir_intrinsic_load_interpolated_input);
load->num_components = intrin->num_components;
nir_intrinsic_set_base(load, var->data.driver_location);
- nir_intrinsic_set_component(load, var->data.location_frac);
+ nir_intrinsic_set_component(load, component);
+
+ nir_io_semantics semantics = {0};
+ semantics.location = var->data.location;
+ semantics.num_slots = get_number_of_slots(state, var);
+ nir_intrinsic_set_io_semantics(load, semantics);
load->src[0] = nir_src_for_ssa(&bary_setup->dest.ssa);
load->src[1] = nir_src_for_ssa(offset);
- return load;
+ assert(intrin->dest.is_ssa);
+ nir_ssa_dest_init(&load->instr, &load->dest,
+ intrin->dest.ssa.num_components,
+ intrin->dest.ssa.bit_size, NULL);
+ nir_builder_instr_insert(b, &load->instr);
+
+ return &load->dest.ssa;
}
static bool
{
nir_builder *b = &state->builder;
const nir_shader_compiler_options *options = b->shader->options;
+ bool progress = false;
nir_foreach_instr_safe(instr, block) {
if (instr->type != nir_instr_type_intrinsic)
nir_intrinsic_instr *intrin = nir_instr_as_intrinsic(instr);
switch (intrin->intrinsic) {
- case nir_intrinsic_load_var:
- case nir_intrinsic_store_var:
- case nir_intrinsic_var_atomic_add:
- case nir_intrinsic_var_atomic_imin:
- case nir_intrinsic_var_atomic_umin:
- case nir_intrinsic_var_atomic_imax:
- case nir_intrinsic_var_atomic_umax:
- case nir_intrinsic_var_atomic_and:
- case nir_intrinsic_var_atomic_or:
- case nir_intrinsic_var_atomic_xor:
- case nir_intrinsic_var_atomic_exchange:
- case nir_intrinsic_var_atomic_comp_swap:
+ case nir_intrinsic_load_deref:
+ case nir_intrinsic_store_deref:
/* We can lower the io for this nir instrinsic */
break;
- case nir_intrinsic_interp_var_at_centroid:
- case nir_intrinsic_interp_var_at_sample:
- case nir_intrinsic_interp_var_at_offset:
+ case nir_intrinsic_interp_deref_at_centroid:
+ case nir_intrinsic_interp_deref_at_sample:
+ case nir_intrinsic_interp_deref_at_offset:
+ case nir_intrinsic_interp_deref_at_vertex:
/* We can optionally lower these to load_interpolated_input */
if (options->use_interpolated_input_intrinsics)
break;
continue;
}
- nir_variable *var = intrin->variables[0]->var;
- nir_variable_mode mode = var->data.mode;
+ nir_deref_instr *deref = nir_src_as_deref(intrin->src[0]);
+ nir_variable_mode mode = deref->mode;
+ assert(util_is_power_of_two_nonzero(mode));
if ((state->modes & mode) == 0)
continue;
- if (mode != nir_var_shader_in &&
- mode != nir_var_shader_out &&
- mode != nir_var_shared &&
- mode != nir_var_uniform)
- continue;
+ nir_variable *var = nir_deref_instr_get_variable(deref);
b->cursor = nir_before_instr(instr);
- const bool per_vertex =
- is_per_vertex_input(state, var) || is_per_vertex_output(state, var);
+ const bool per_vertex = nir_is_per_vertex_io(var, b->shader->info.stage);
nir_ssa_def *offset;
nir_ssa_def *vertex_index = NULL;
+ unsigned component_offset = var->data.location_frac;
+ bool bindless_type_size = mode == nir_var_shader_in ||
+ mode == nir_var_shader_out ||
+ var->data.bindless;
- offset = get_io_offset(b, intrin->variables[0],
- per_vertex ? &vertex_index : NULL,
- state->type_size);
+ offset = get_io_offset(b, deref, per_vertex ? &vertex_index : NULL,
+ state->type_size, &component_offset,
+ bindless_type_size);
- nir_intrinsic_instr *replacement;
+ nir_ssa_def *replacement = NULL;
switch (intrin->intrinsic) {
- case nir_intrinsic_load_var:
- replacement = lower_load(intrin, state, vertex_index, offset);
- break;
-
- case nir_intrinsic_store_var:
- replacement = lower_store(intrin, state, vertex_index, offset);
+ case nir_intrinsic_load_deref:
+ replacement = lower_load(intrin, state, vertex_index, var, offset,
+ component_offset, deref->type);
break;
- case nir_intrinsic_var_atomic_add:
- case nir_intrinsic_var_atomic_imin:
- case nir_intrinsic_var_atomic_umin:
- case nir_intrinsic_var_atomic_imax:
- case nir_intrinsic_var_atomic_umax:
- case nir_intrinsic_var_atomic_and:
- case nir_intrinsic_var_atomic_or:
- case nir_intrinsic_var_atomic_xor:
- case nir_intrinsic_var_atomic_exchange:
- case nir_intrinsic_var_atomic_comp_swap:
- assert(vertex_index == NULL);
- replacement = lower_atomic(intrin, state, offset);
+ case nir_intrinsic_store_deref:
+ lower_store(intrin, state, vertex_index, var, offset,
+ component_offset, deref->type);
break;
- case nir_intrinsic_interp_var_at_centroid:
- case nir_intrinsic_interp_var_at_sample:
- case nir_intrinsic_interp_var_at_offset:
+ case nir_intrinsic_interp_deref_at_centroid:
+ case nir_intrinsic_interp_deref_at_sample:
+ case nir_intrinsic_interp_deref_at_offset:
+ case nir_intrinsic_interp_deref_at_vertex:
assert(vertex_index == NULL);
- replacement = lower_interpolate_at(intrin, state, offset);
+ replacement = lower_interpolate_at(intrin, state, var, offset,
+ component_offset, deref->type);
break;
default:
continue;
}
- if (nir_intrinsic_infos[intrin->intrinsic].has_dest) {
- if (intrin->dest.is_ssa) {
- nir_ssa_dest_init(&replacement->instr, &replacement->dest,
- intrin->dest.ssa.num_components,
- intrin->dest.ssa.bit_size, NULL);
- nir_ssa_def_rewrite_uses(&intrin->dest.ssa,
- nir_src_for_ssa(&replacement->dest.ssa));
- } else {
- nir_dest_copy(&replacement->dest, &intrin->dest, state->mem_ctx);
- }
+ if (replacement) {
+ nir_ssa_def_rewrite_uses(&intrin->dest.ssa,
+ nir_src_for_ssa(replacement));
}
-
- nir_instr_insert_before(&intrin->instr, &replacement->instr);
nir_instr_remove(&intrin->instr);
+ progress = true;
}
- return true;
+ return progress;
}
-static void
+static bool
nir_lower_io_impl(nir_function_impl *impl,
nir_variable_mode modes,
- int (*type_size)(const struct glsl_type *))
+ int (*type_size)(const struct glsl_type *, bool),
+ nir_lower_io_options options)
{
struct lower_io_state state;
+ bool progress = false;
nir_builder_init(&state.builder, impl);
- state.mem_ctx = ralloc_parent(impl);
+ state.dead_ctx = ralloc_context(NULL);
state.modes = modes;
state.type_size = type_size;
+ state.options = options;
+
+ ASSERTED nir_variable_mode supported_modes =
+ nir_var_shader_in | nir_var_shader_out | nir_var_uniform;
+ assert(!(modes & ~supported_modes));
nir_foreach_block(block, impl) {
- nir_lower_io_block(block, &state);
+ progress |= nir_lower_io_block(block, &state);
}
+ ralloc_free(state.dead_ctx);
+
nir_metadata_preserve(impl, nir_metadata_block_index |
nir_metadata_dominance);
+ return progress;
}
-void
+/** Lower load/store_deref intrinsics on I/O variables to offset-based intrinsics
+ *
+ * This pass is intended to be used for cross-stage shader I/O and driver-
+ * managed uniforms to turn deref-based access into a simpler model using
+ * locations or offsets. For fragment shader inputs, it can optionally turn
+ * load_deref into an explicit interpolation using barycentrics coming from
+ * one of the load_barycentric_* intrinsics. This pass requires that all
+ * deref chains are complete and contain no casts.
+ */
+bool
nir_lower_io(nir_shader *shader, nir_variable_mode modes,
- int (*type_size)(const struct glsl_type *))
+ int (*type_size)(const struct glsl_type *, bool),
+ nir_lower_io_options options)
+{
+ bool progress = false;
+
+ nir_foreach_function(function, shader) {
+ if (function->impl) {
+ progress |= nir_lower_io_impl(function->impl, modes,
+ type_size, options);
+ }
+ }
+
+ 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);
+
+ switch (addr_format) {
+ case nir_address_format_32bit_global:
+ case nir_address_format_64bit_global:
+ case nir_address_format_32bit_offset:
+ assert(addr->bit_size == offset->bit_size);
+ assert(addr->num_components == 1);
+ return nir_iadd(b, addr, offset);
+
+ case nir_address_format_32bit_offset_as_64bit:
+ assert(addr->num_components == 1);
+ assert(offset->bit_size == 32);
+ return nir_u2u64(b, nir_iadd(b, nir_u2u32(b, addr), offset));
+
+ case nir_address_format_64bit_bounded_global:
+ assert(addr->num_components == 4);
+ assert(addr->bit_size == offset->bit_size);
+ return nir_vec4(b, nir_channel(b, addr, 0),
+ nir_channel(b, addr, 1),
+ nir_channel(b, addr, 2),
+ nir_iadd(b, nir_channel(b, addr, 3), offset));
+
+ case nir_address_format_32bit_index_offset:
+ assert(addr->num_components == 2);
+ assert(addr->bit_size == offset->bit_size);
+ return nir_vec2(b, nir_channel(b, addr, 0),
+ nir_iadd(b, nir_channel(b, addr, 1), offset));
+
+ case nir_address_format_32bit_index_offset_pack64:
+ assert(addr->num_components == 1);
+ assert(offset->bit_size == 32);
+ return nir_pack_64_2x32_split(b,
+ nir_iadd(b, nir_unpack_64_2x32_split_x(b, addr), offset),
+ nir_unpack_64_2x32_split_y(b, addr));
+
+ case nir_address_format_vec2_index_32bit_offset:
+ assert(addr->num_components == 3);
+ assert(offset->bit_size == 32);
+ return nir_vec3(b, nir_channel(b, addr, 0), nir_channel(b, addr, 1),
+ nir_iadd(b, nir_channel(b, addr, 2), offset));
+
+ case nir_address_format_logical:
+ unreachable("Unsupported address format");
+ }
+ unreachable("Invalid address format");
+}
+
+static unsigned
+addr_get_offset_bit_size(nir_ssa_def *addr, nir_address_format addr_format)
+{
+ if (addr_format == nir_address_format_32bit_offset_as_64bit ||
+ addr_format == nir_address_format_32bit_index_offset_pack64)
+ return 32;
+ return addr->bit_size;
+}
+
+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_get_offset_bit_size(addr, addr_format)));
+}
+
+static nir_ssa_def *
+addr_to_index(nir_builder *b, nir_ssa_def *addr,
+ nir_address_format addr_format)
+{
+ switch (addr_format) {
+ case nir_address_format_32bit_index_offset:
+ assert(addr->num_components == 2);
+ return nir_channel(b, addr, 0);
+ case nir_address_format_32bit_index_offset_pack64:
+ return nir_unpack_64_2x32_split_y(b, addr);
+ case nir_address_format_vec2_index_32bit_offset:
+ assert(addr->num_components == 3);
+ return nir_channels(b, addr, 0x3);
+ default: unreachable("Invalid address format");
+ }
+}
+
+static nir_ssa_def *
+addr_to_offset(nir_builder *b, nir_ssa_def *addr,
+ nir_address_format addr_format)
+{
+ switch (addr_format) {
+ case nir_address_format_32bit_index_offset:
+ assert(addr->num_components == 2);
+ return nir_channel(b, addr, 1);
+ case nir_address_format_32bit_index_offset_pack64:
+ return nir_unpack_64_2x32_split_x(b, addr);
+ case nir_address_format_vec2_index_32bit_offset:
+ assert(addr->num_components == 3);
+ return nir_channel(b, addr, 2);
+ case nir_address_format_32bit_offset:
+ return addr;
+ case nir_address_format_32bit_offset_as_64bit:
+ return nir_u2u32(b, addr);
+ default:
+ unreachable("Invalid address format");
+ }
+}
+
+/** Returns true if the given address format resolves to a global address */
+static bool
+addr_format_is_global(nir_address_format addr_format)
+{
+ return addr_format == nir_address_format_32bit_global ||
+ addr_format == nir_address_format_64bit_global ||
+ addr_format == nir_address_format_64bit_bounded_global;
+}
+
+static bool
+addr_format_is_offset(nir_address_format addr_format)
+{
+ return addr_format == nir_address_format_32bit_offset ||
+ addr_format == nir_address_format_32bit_offset_as_64bit;
+}
+
+static nir_ssa_def *
+addr_to_global(nir_builder *b, nir_ssa_def *addr,
+ nir_address_format addr_format)
+{
+ switch (addr_format) {
+ case nir_address_format_32bit_global:
+ case nir_address_format_64bit_global:
+ assert(addr->num_components == 1);
+ return addr;
+
+ case nir_address_format_64bit_bounded_global:
+ assert(addr->num_components == 4);
+ return nir_iadd(b, nir_pack_64_2x32(b, nir_channels(b, addr, 0x3)),
+ nir_u2u64(b, nir_channel(b, addr, 3)));
+
+ case nir_address_format_32bit_index_offset:
+ case nir_address_format_32bit_index_offset_pack64:
+ case nir_address_format_vec2_index_32bit_offset:
+ case nir_address_format_32bit_offset:
+ case nir_address_format_32bit_offset_as_64bit:
+ case nir_address_format_logical:
+ unreachable("Cannot get a 64-bit address with this address format");
+ }
+
+ unreachable("Invalid address format");
+}
+
+static bool
+addr_format_needs_bounds_check(nir_address_format addr_format)
+{
+ return addr_format == nir_address_format_64bit_bounded_global;
+}
+
+static nir_ssa_def *
+addr_is_in_bounds(nir_builder *b, nir_ssa_def *addr,
+ nir_address_format addr_format, unsigned size)
+{
+ assert(addr_format == nir_address_format_64bit_bounded_global);
+ assert(addr->num_components == 4);
+ return nir_ige(b, nir_channel(b, addr, 2),
+ nir_iadd_imm(b, nir_channel(b, addr, 3), size));
+}
+
+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_mem_ubo:
+ op = nir_intrinsic_load_ubo;
+ break;
+ case nir_var_mem_ssbo:
+ if (addr_format_is_global(addr_format))
+ op = nir_intrinsic_load_global;
+ else
+ op = nir_intrinsic_load_ssbo;
+ break;
+ case nir_var_mem_global:
+ assert(addr_format_is_global(addr_format));
+ op = nir_intrinsic_load_global;
+ break;
+ case nir_var_uniform:
+ assert(addr_format_is_offset(addr_format));
+ assert(b->shader->info.stage == MESA_SHADER_KERNEL);
+ op = nir_intrinsic_load_kernel_input;
+ break;
+ case nir_var_mem_shared:
+ assert(addr_format_is_offset(addr_format));
+ op = nir_intrinsic_load_shared;
+ break;
+ case nir_var_shader_temp:
+ case nir_var_function_temp:
+ if (addr_format_is_offset(addr_format)) {
+ op = nir_intrinsic_load_scratch;
+ } else {
+ assert(addr_format_is_global(addr_format));
+ op = nir_intrinsic_load_global;
+ }
+ break;
+ default:
+ unreachable("Unsupported explicit IO variable mode");
+ }
+
+ nir_intrinsic_instr *load = nir_intrinsic_instr_create(b->shader, op);
+
+ if (addr_format_is_global(addr_format)) {
+ load->src[0] = nir_src_for_ssa(addr_to_global(b, addr, addr_format));
+ } else if (addr_format_is_offset(addr_format)) {
+ assert(addr->num_components == 1);
+ load->src[0] = nir_src_for_ssa(addr_to_offset(b, addr, addr_format));
+ } else {
+ 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 (nir_intrinsic_has_access(load))
+ nir_intrinsic_set_access(load, nir_intrinsic_access(intrin));
+
+ unsigned bit_size = intrin->dest.ssa.bit_size;
+ if (bit_size == 1) {
+ /* TODO: Make the native bool bit_size an option. */
+ bit_size = 32;
+ }
+
+ /* 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, bit_size / 8, 0);
+
+ assert(intrin->dest.is_ssa);
+ load->num_components = num_components;
+ nir_ssa_dest_init(&load->instr, &load->dest, num_components,
+ bit_size, intrin->dest.ssa.name);
+
+ assert(bit_size % 8 == 0);
+
+ nir_ssa_def *result;
+ if (addr_format_needs_bounds_check(addr_format)) {
+ /* The Vulkan spec for robustBufferAccess gives us quite a few options
+ * as to what we can do with an OOB read. Unfortunately, returning
+ * undefined values isn't one of them so we return an actual zero.
+ */
+ nir_ssa_def *zero = nir_imm_zero(b, load->num_components, bit_size);
+
+ const unsigned load_size = (bit_size / 8) * load->num_components;
+ nir_push_if(b, addr_is_in_bounds(b, addr, addr_format, load_size));
+
+ nir_builder_instr_insert(b, &load->instr);
+
+ nir_pop_if(b, NULL);
+
+ result = nir_if_phi(b, &load->dest.ssa, zero);
+ } else {
+ nir_builder_instr_insert(b, &load->instr);
+ result = &load->dest.ssa;
+ }
+
+ if (intrin->dest.ssa.bit_size == 1) {
+ /* For shared, we can go ahead and use NIR's and/or the back-end's
+ * standard encoding for booleans rather than forcing a 0/1 boolean.
+ * This should save an instruction or two.
+ */
+ if (mode == nir_var_mem_shared ||
+ mode == nir_var_shader_temp ||
+ mode == nir_var_function_temp)
+ result = nir_b2b1(b, result);
+ else
+ result = nir_i2b(b, result);
+ }
+
+ return result;
+}
+
+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_mem_ssbo:
+ if (addr_format_is_global(addr_format))
+ op = nir_intrinsic_store_global;
+ else
+ op = nir_intrinsic_store_ssbo;
+ break;
+ case nir_var_mem_global:
+ assert(addr_format_is_global(addr_format));
+ op = nir_intrinsic_store_global;
+ break;
+ case nir_var_mem_shared:
+ assert(addr_format_is_offset(addr_format));
+ op = nir_intrinsic_store_shared;
+ break;
+ case nir_var_shader_temp:
+ case nir_var_function_temp:
+ if (addr_format_is_offset(addr_format)) {
+ op = nir_intrinsic_store_scratch;
+ } else {
+ assert(addr_format_is_global(addr_format));
+ op = nir_intrinsic_store_global;
+ }
+ break;
+ default:
+ unreachable("Unsupported explicit IO variable mode");
+ }
+
+ nir_intrinsic_instr *store = nir_intrinsic_instr_create(b->shader, op);
+
+ if (value->bit_size == 1) {
+ /* For shared, we can go ahead and use NIR's and/or the back-end's
+ * standard encoding for booleans rather than forcing a 0/1 boolean.
+ * This should save an instruction or two.
+ *
+ * TODO: Make the native bool bit_size an option.
+ */
+ if (mode == nir_var_mem_shared ||
+ mode == nir_var_shader_temp ||
+ mode == nir_var_function_temp)
+ value = nir_b2b32(b, value);
+ else
+ value = nir_b2i(b, value, 32);
+ }
+
+ store->src[0] = nir_src_for_ssa(value);
+ if (addr_format_is_global(addr_format)) {
+ store->src[1] = nir_src_for_ssa(addr_to_global(b, addr, addr_format));
+ } else if (addr_format_is_offset(addr_format)) {
+ assert(addr->num_components == 1);
+ store->src[1] = nir_src_for_ssa(addr_to_offset(b, addr, addr_format));
+ } else {
+ 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);
+
+ if (nir_intrinsic_has_access(store))
+ 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;
+
+ assert(value->bit_size % 8 == 0);
+
+ if (addr_format_needs_bounds_check(addr_format)) {
+ const unsigned store_size = (value->bit_size / 8) * store->num_components;
+ nir_push_if(b, addr_is_in_bounds(b, addr, addr_format, store_size));
+
+ nir_builder_instr_insert(b, &store->instr);
+
+ nir_pop_if(b, NULL);
+ } else {
+ 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_mem_ssbo:
+ if (addr_format_is_global(addr_format))
+ op = global_atomic_for_deref(intrin->intrinsic);
+ else
+ op = ssbo_atomic_for_deref(intrin->intrinsic);
+ break;
+ case nir_var_mem_global:
+ assert(addr_format_is_global(addr_format));
+ op = global_atomic_for_deref(intrin->intrinsic);
+ break;
+ case nir_var_mem_shared:
+ assert(addr_format_is_offset(addr_format));
+ op = shared_atomic_for_deref(intrin->intrinsic);
+ break;
+ default:
+ unreachable("Unsupported explicit IO variable mode");
+ }
+
+ nir_intrinsic_instr *atomic = nir_intrinsic_instr_create(b->shader, op);
+
+ unsigned src = 0;
+ if (addr_format_is_global(addr_format)) {
+ atomic->src[src++] = nir_src_for_ssa(addr_to_global(b, addr, addr_format));
+ } else if (addr_format_is_offset(addr_format)) {
+ assert(addr->num_components == 1);
+ atomic->src[src++] = nir_src_for_ssa(addr_to_offset(b, addr, addr_format));
+ } else {
+ atomic->src[src++] = nir_src_for_ssa(addr_to_index(b, addr, addr_format));
+ atomic->src[src++] = nir_src_for_ssa(addr_to_offset(b, addr, addr_format));
+ }
+ for (unsigned i = 0; i < num_data_srcs; i++) {
+ atomic->src[src++] = nir_src_for_ssa(intrin->src[1 + i].ssa);
+ }
+
+ /* Global atomics don't have access flags because they assume that the
+ * address may be non-uniform.
+ */
+ if (nir_intrinsic_has_access(atomic))
+ nir_intrinsic_set_access(atomic, nir_intrinsic_access(intrin));
+
+ 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);
+
+ assert(atomic->dest.ssa.bit_size % 8 == 0);
+
+ if (addr_format_needs_bounds_check(addr_format)) {
+ const unsigned atomic_size = atomic->dest.ssa.bit_size / 8;
+ nir_push_if(b, addr_is_in_bounds(b, addr, addr_format, atomic_size));
+
+ nir_builder_instr_insert(b, &atomic->instr);
+
+ nir_pop_if(b, NULL);
+ return nir_if_phi(b, &atomic->dest.ssa,
+ nir_ssa_undef(b, 1, atomic->dest.ssa.bit_size));
+ } else {
+ nir_builder_instr_insert(b, &atomic->instr);
+ return &atomic->dest.ssa;
+ }
+}
+
+nir_ssa_def *
+nir_explicit_io_address_from_deref(nir_builder *b, nir_deref_instr *deref,
+ nir_ssa_def *base_addr,
+ nir_address_format addr_format)
+{
+ assert(deref->dest.is_ssa);
+ switch (deref->deref_type) {
+ case nir_deref_type_var:
+ assert(deref->mode & (nir_var_uniform | nir_var_mem_shared |
+ nir_var_shader_temp | nir_var_function_temp));
+ if (addr_format_is_global(addr_format)) {
+ assert(nir_var_shader_temp | nir_var_function_temp);
+ base_addr =
+ nir_load_scratch_base_ptr(b, !(deref->mode & nir_var_shader_temp),
+ nir_address_format_num_components(addr_format),
+ nir_address_format_bit_size(addr_format));
+ return build_addr_iadd_imm(b, base_addr, addr_format,
+ deref->var->data.driver_location);
+ } else {
+ assert(deref->var->data.driver_location <= UINT32_MAX);
+ return nir_imm_intN_t(b, deref->var->data.driver_location,
+ deref->dest.ssa.bit_size);
+ }
+
+ 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, addr_get_offset_bit_size(base_addr, addr_format));
+ return build_addr_iadd(b, base_addr, addr_format,
+ nir_amul_imm(b, index, stride));
+ }
+
+ 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, addr_get_offset_bit_size(base_addr, addr_format));
+ unsigned stride = nir_deref_instr_ptr_as_array_stride(deref);
+ return build_addr_iadd(b, base_addr, addr_format,
+ nir_amul_imm(b, index, stride));
+ }
+
+ 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);
+ return build_addr_iadd_imm(b, base_addr, addr_format, offset);
+ }
+
+ case nir_deref_type_cast:
+ /* Nothing to do here */
+ return base_addr;
+ }
+
+ unreachable("Invalid NIR deref type");
+}
+
+void
+nir_lower_explicit_io_instr(nir_builder *b,
+ nir_intrinsic_instr *intrin,
+ nir_ssa_def *addr,
+ 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);
+
+ 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 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_is_empty(&deref->dest.ssa.if_uses));
+ if (list_is_empty(&deref->dest.ssa.uses)) {
+ nir_instr_remove(&deref->instr);
+ return;
+ }
+
+ b->cursor = nir_after_instr(&deref->instr);
+
+ nir_ssa_def *base_addr = NULL;
+ if (deref->deref_type != nir_deref_type_var) {
+ assert(deref->parent.is_ssa);
+ base_addr = deref->parent.ssa;
+ }
+
+ nir_ssa_def *addr = nir_explicit_io_address_from_deref(b, deref, base_addr,
+ addr_format);
+
+ 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)
+{
+ assert(intrin->src[0].is_ssa);
+ nir_lower_explicit_io_instr(b, intrin, intrin->src[0].ssa, addr_format);
+}
+
+static void
+lower_explicit_io_array_length(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]);
+
+ assert(glsl_type_is_array(deref->type));
+ assert(glsl_get_length(deref->type) == 0);
+ unsigned stride = glsl_get_explicit_stride(deref->type);
+ assert(stride > 0);
+
+ nir_ssa_def *addr = &deref->dest.ssa;
+ nir_ssa_def *index = addr_to_index(b, addr, addr_format);
+ nir_ssa_def *offset = addr_to_offset(b, addr, addr_format);
+
+ nir_intrinsic_instr *bsize =
+ nir_intrinsic_instr_create(b->shader, nir_intrinsic_get_buffer_size);
+ bsize->src[0] = nir_src_for_ssa(index);
+ nir_ssa_dest_init(&bsize->instr, &bsize->dest, 1, 32, NULL);
+ nir_builder_instr_insert(b, &bsize->instr);
+
+ nir_ssa_def *arr_size =
+ nir_idiv(b, nir_isub(b, &bsize->dest.ssa, offset),
+ nir_imm_int(b, stride));
+
+ nir_ssa_def_rewrite_uses(&intrin->dest.ssa, nir_src_for_ssa(arr_size));
+ 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;
+ }
+
+ case nir_intrinsic_deref_buffer_array_length: {
+ nir_deref_instr *deref = nir_src_as_deref(intrin->src[0]);
+ if (deref->mode & modes) {
+ lower_explicit_io_array_length(&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;
+}
+
+/** Lower explicitly laid out I/O access to byte offset/address intrinsics
+ *
+ * This pass is intended to be used for any I/O which touches memory external
+ * to the shader or which is directly visible to the client. It requires that
+ * all data types in the given modes have a explicit stride/offset decorations
+ * to tell it exactly how to calculate the offset/address for the given load,
+ * store, or atomic operation. If the offset/stride information does not come
+ * from the client explicitly (as with shared variables in GL or Vulkan),
+ * nir_lower_vars_to_explicit_types() can be used to add them.
+ *
+ * Unlike nir_lower_io, this pass is fully capable of handling incomplete
+ * pointer chains which may contain cast derefs. It does so by walking the
+ * deref chain backwards and simply replacing each deref, one at a time, with
+ * the appropriate address calculation. The pass takes a nir_address_format
+ * parameter which describes how the offset or address is to be represented
+ * during calculations. By ensuring that the address is always in a
+ * consistent format, pointers can safely be conjured from thin air by the
+ * driver, stored to variables, passed through phis, etc.
+ *
+ * The one exception to the simple algorithm described above is for handling
+ * row-major matrices in which case we may look down one additional level of
+ * the deref chain.
+ */
+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;
+}
+
+static bool
+nir_lower_vars_to_explicit_types_impl(nir_function_impl *impl,
+ nir_variable_mode modes,
+ glsl_type_size_align_func type_info)
+{
+ bool progress = false;
+
+ nir_foreach_block(block, impl) {
+ nir_foreach_instr(instr, block) {
+ if (instr->type != nir_instr_type_deref)
+ continue;
+
+ nir_deref_instr *deref = nir_instr_as_deref(instr);
+ if (!(deref->mode & modes))
+ continue;
+
+ unsigned size, alignment;
+ const struct glsl_type *new_type =
+ glsl_get_explicit_type_for_size_align(deref->type, type_info, &size, &alignment);
+ if (new_type != deref->type) {
+ progress = true;
+ deref->type = new_type;
+ }
+ if (deref->deref_type == nir_deref_type_cast) {
+ /* See also glsl_type::get_explicit_type_for_size_align() */
+ unsigned new_stride = align(size, alignment);
+ if (new_stride != deref->cast.ptr_stride) {
+ deref->cast.ptr_stride = new_stride;
+ progress = true;
+ }
+ }
+ }
+ }
+
+ if (progress) {
+ nir_metadata_preserve(impl, nir_metadata_block_index |
+ nir_metadata_dominance |
+ nir_metadata_live_ssa_defs |
+ nir_metadata_loop_analysis);
+ }
+
+ return progress;
+}
+
+static bool
+lower_vars_to_explicit(nir_shader *shader,
+ struct exec_list *vars, nir_variable_mode mode,
+ glsl_type_size_align_func type_info)
+{
+ bool progress = false;
+ unsigned offset;
+ switch (mode) {
+ case nir_var_function_temp:
+ case nir_var_shader_temp:
+ offset = shader->scratch_size;
+ break;
+ case nir_var_mem_shared:
+ offset = 0;
+ break;
+ default:
+ unreachable("Unsupported mode");
+ }
+ nir_foreach_variable_in_list(var, vars) {
+ if (var->data.mode != mode)
+ continue;
+
+ unsigned size, align;
+ const struct glsl_type *explicit_type =
+ glsl_get_explicit_type_for_size_align(var->type, type_info, &size, &align);
+
+ if (explicit_type != var->type) {
+ progress = true;
+ var->type = explicit_type;
+ }
+
+ var->data.driver_location = ALIGN_POT(offset, align);
+ offset = var->data.driver_location + size;
+ }
+
+ switch (mode) {
+ case nir_var_shader_temp:
+ case nir_var_function_temp:
+ shader->scratch_size = offset;
+ break;
+ case nir_var_mem_shared:
+ shader->info.cs.shared_size = offset;
+ shader->num_shared = offset;
+ break;
+ default:
+ unreachable("Unsupported mode");
+ }
+
+ return progress;
+}
+
+bool
+nir_lower_vars_to_explicit_types(nir_shader *shader,
+ nir_variable_mode modes,
+ glsl_type_size_align_func type_info)
{
+ /* TODO: Situations which need to be handled to support more modes:
+ * - row-major matrices
+ * - compact shader inputs/outputs
+ * - interface types
+ */
+ ASSERTED nir_variable_mode supported = nir_var_mem_shared |
+ nir_var_shader_temp | nir_var_function_temp;
+ assert(!(modes & ~supported) && "unsupported");
+
+ bool progress = false;
+
+ if (modes & nir_var_mem_shared)
+ progress |= lower_vars_to_explicit(shader, &shader->variables, nir_var_mem_shared, type_info);
+ if (modes & nir_var_shader_temp)
+ progress |= lower_vars_to_explicit(shader, &shader->variables, nir_var_shader_temp, type_info);
+
nir_foreach_function(function, shader) {
- if (function->impl)
- nir_lower_io_impl(function->impl, modes, type_size);
+ if (function->impl) {
+ if (modes & nir_var_function_temp)
+ progress |= lower_vars_to_explicit(shader, &function->impl->locals, nir_var_function_temp, type_info);
+
+ progress |= nir_lower_vars_to_explicit_types_impl(function->impl, modes, type_info);
+ }
}
+
+ return progress;
}
/**
- * Return the offset soruce for a load/store intrinsic.
+ * Return the offset source for a load/store intrinsic.
*/
nir_src *
nir_get_io_offset_src(nir_intrinsic_instr *instr)
switch (instr->intrinsic) {
case nir_intrinsic_load_input:
case nir_intrinsic_load_output:
+ case nir_intrinsic_load_shared:
case nir_intrinsic_load_uniform:
+ case nir_intrinsic_load_global:
+ case nir_intrinsic_load_scratch:
+ case nir_intrinsic_load_fs_input_interp_deltas:
+ case nir_intrinsic_shared_atomic_add:
+ case nir_intrinsic_shared_atomic_and:
+ case nir_intrinsic_shared_atomic_comp_swap:
+ case nir_intrinsic_shared_atomic_exchange:
+ case nir_intrinsic_shared_atomic_fadd:
+ case nir_intrinsic_shared_atomic_fcomp_swap:
+ case nir_intrinsic_shared_atomic_fmax:
+ case nir_intrinsic_shared_atomic_fmin:
+ case nir_intrinsic_shared_atomic_imax:
+ case nir_intrinsic_shared_atomic_imin:
+ case nir_intrinsic_shared_atomic_or:
+ case nir_intrinsic_shared_atomic_umax:
+ case nir_intrinsic_shared_atomic_umin:
+ case nir_intrinsic_shared_atomic_xor:
+ case nir_intrinsic_global_atomic_add:
+ case nir_intrinsic_global_atomic_and:
+ case nir_intrinsic_global_atomic_comp_swap:
+ case nir_intrinsic_global_atomic_exchange:
+ case nir_intrinsic_global_atomic_fadd:
+ case nir_intrinsic_global_atomic_fcomp_swap:
+ case nir_intrinsic_global_atomic_fmax:
+ case nir_intrinsic_global_atomic_fmin:
+ case nir_intrinsic_global_atomic_imax:
+ case nir_intrinsic_global_atomic_imin:
+ case nir_intrinsic_global_atomic_or:
+ case nir_intrinsic_global_atomic_umax:
+ case nir_intrinsic_global_atomic_umin:
+ case nir_intrinsic_global_atomic_xor:
return &instr->src[0];
case nir_intrinsic_load_ubo:
case nir_intrinsic_load_ssbo:
+ case nir_intrinsic_load_input_vertex:
case nir_intrinsic_load_per_vertex_input:
case nir_intrinsic_load_per_vertex_output:
case nir_intrinsic_load_interpolated_input:
case nir_intrinsic_store_output:
+ case nir_intrinsic_store_shared:
+ case nir_intrinsic_store_global:
+ case nir_intrinsic_store_scratch:
+ case nir_intrinsic_ssbo_atomic_add:
+ case nir_intrinsic_ssbo_atomic_imin:
+ case nir_intrinsic_ssbo_atomic_umin:
+ case nir_intrinsic_ssbo_atomic_imax:
+ case nir_intrinsic_ssbo_atomic_umax:
+ case nir_intrinsic_ssbo_atomic_and:
+ case nir_intrinsic_ssbo_atomic_or:
+ case nir_intrinsic_ssbo_atomic_xor:
+ case nir_intrinsic_ssbo_atomic_exchange:
+ case nir_intrinsic_ssbo_atomic_comp_swap:
+ case nir_intrinsic_ssbo_atomic_fadd:
+ case nir_intrinsic_ssbo_atomic_fmin:
+ case nir_intrinsic_ssbo_atomic_fmax:
+ case nir_intrinsic_ssbo_atomic_fcomp_swap:
return &instr->src[1];
case nir_intrinsic_store_ssbo:
case nir_intrinsic_store_per_vertex_output:
return NULL;
}
}
+
+/**
+ * Return the numeric constant that identify a NULL pointer for each address
+ * format.
+ */
+const nir_const_value *
+nir_address_format_null_value(nir_address_format addr_format)
+{
+ const static nir_const_value null_values[][NIR_MAX_VEC_COMPONENTS] = {
+ [nir_address_format_32bit_global] = {{0}},
+ [nir_address_format_64bit_global] = {{0}},
+ [nir_address_format_64bit_bounded_global] = {{0}},
+ [nir_address_format_32bit_index_offset] = {{.u32 = ~0}, {.u32 = ~0}},
+ [nir_address_format_32bit_index_offset_pack64] = {{.u64 = ~0ull}},
+ [nir_address_format_vec2_index_32bit_offset] = {{.u32 = ~0}, {.u32 = ~0}, {.u32 = ~0}},
+ [nir_address_format_32bit_offset] = {{.u32 = ~0}},
+ [nir_address_format_32bit_offset_as_64bit] = {{.u64 = ~0ull}},
+ [nir_address_format_logical] = {{.u32 = ~0}},
+ };
+
+ assert(addr_format < ARRAY_SIZE(null_values));
+ return null_values[addr_format];
+}
+
+nir_ssa_def *
+nir_build_addr_ieq(nir_builder *b, nir_ssa_def *addr0, nir_ssa_def *addr1,
+ nir_address_format addr_format)
+{
+ switch (addr_format) {
+ case nir_address_format_32bit_global:
+ case nir_address_format_64bit_global:
+ case nir_address_format_64bit_bounded_global:
+ case nir_address_format_32bit_index_offset:
+ case nir_address_format_vec2_index_32bit_offset:
+ case nir_address_format_32bit_offset:
+ return nir_ball_iequal(b, addr0, addr1);
+
+ case nir_address_format_32bit_offset_as_64bit:
+ assert(addr0->num_components == 1 && addr1->num_components == 1);
+ return nir_ieq(b, nir_u2u32(b, addr0), nir_u2u32(b, addr1));
+
+ case nir_address_format_32bit_index_offset_pack64:
+ assert(addr0->num_components == 1 && addr1->num_components == 1);
+ return nir_ball_iequal(b, nir_unpack_64_2x32(b, addr0), nir_unpack_64_2x32(b, addr1));
+
+ case nir_address_format_logical:
+ unreachable("Unsupported address format");
+ }
+
+ unreachable("Invalid address format");
+}
+
+nir_ssa_def *
+nir_build_addr_isub(nir_builder *b, nir_ssa_def *addr0, nir_ssa_def *addr1,
+ nir_address_format addr_format)
+{
+ switch (addr_format) {
+ case nir_address_format_32bit_global:
+ case nir_address_format_64bit_global:
+ case nir_address_format_32bit_offset:
+ case nir_address_format_32bit_index_offset_pack64:
+ assert(addr0->num_components == 1);
+ assert(addr1->num_components == 1);
+ return nir_isub(b, addr0, addr1);
+
+ case nir_address_format_32bit_offset_as_64bit:
+ assert(addr0->num_components == 1);
+ assert(addr1->num_components == 1);
+ return nir_u2u64(b, nir_isub(b, nir_u2u32(b, addr0), nir_u2u32(b, addr1)));
+
+ case nir_address_format_64bit_bounded_global:
+ return nir_isub(b, addr_to_global(b, addr0, addr_format),
+ addr_to_global(b, addr1, addr_format));
+
+ case nir_address_format_32bit_index_offset:
+ assert(addr0->num_components == 2);
+ assert(addr1->num_components == 2);
+ /* Assume the same buffer index. */
+ return nir_isub(b, nir_channel(b, addr0, 1), nir_channel(b, addr1, 1));
+
+ case nir_address_format_vec2_index_32bit_offset:
+ assert(addr0->num_components == 3);
+ assert(addr1->num_components == 3);
+ /* Assume the same buffer index. */
+ return nir_isub(b, nir_channel(b, addr0, 2), nir_channel(b, addr1, 2));
+
+ case nir_address_format_logical:
+ unreachable("Unsupported address format");
+ }
+
+ unreachable("Invalid address format");
+}
+
+static bool
+is_input(nir_intrinsic_instr *intrin)
+{
+ return intrin->intrinsic == nir_intrinsic_load_input ||
+ intrin->intrinsic == nir_intrinsic_load_per_vertex_input ||
+ intrin->intrinsic == nir_intrinsic_load_interpolated_input ||
+ intrin->intrinsic == nir_intrinsic_load_fs_input_interp_deltas;
+}
+
+static bool
+is_output(nir_intrinsic_instr *intrin)
+{
+ return intrin->intrinsic == nir_intrinsic_load_output ||
+ intrin->intrinsic == nir_intrinsic_load_per_vertex_output ||
+ intrin->intrinsic == nir_intrinsic_store_output ||
+ intrin->intrinsic == nir_intrinsic_store_per_vertex_output;
+}
+
+static bool is_dual_slot(nir_intrinsic_instr *intrin)
+{
+ if (intrin->intrinsic == nir_intrinsic_store_output ||
+ intrin->intrinsic == nir_intrinsic_store_per_vertex_output) {
+ return nir_src_bit_size(intrin->src[0]) == 64 &&
+ nir_src_num_components(intrin->src[0]) >= 3;
+ }
+
+ return nir_dest_bit_size(intrin->dest) &&
+ nir_dest_num_components(intrin->dest) >= 3;
+}
+
+/**
+ * This pass adds constant offsets to instr->const_index[0] for input/output
+ * intrinsics, and resets the offset source to 0. Non-constant offsets remain
+ * unchanged - since we don't know what part of a compound variable is
+ * accessed, we allocate storage for the entire thing. For drivers that use
+ * nir_lower_io_to_temporaries() before nir_lower_io(), this guarantees that
+ * the offset source will be 0, so that they don't have to add it in manually.
+ */
+
+static bool
+add_const_offset_to_base_block(nir_block *block, nir_builder *b,
+ nir_variable_mode mode)
+{
+ bool progress = false;
+ nir_foreach_instr_safe(instr, block) {
+ if (instr->type != nir_instr_type_intrinsic)
+ continue;
+
+ nir_intrinsic_instr *intrin = nir_instr_as_intrinsic(instr);
+
+ if ((mode == nir_var_shader_in && is_input(intrin)) ||
+ (mode == nir_var_shader_out && is_output(intrin))) {
+ nir_src *offset = nir_get_io_offset_src(intrin);
+
+ if (nir_src_is_const(*offset)) {
+ unsigned off = nir_src_as_uint(*offset);
+
+ nir_intrinsic_set_base(intrin, nir_intrinsic_base(intrin) + off);
+
+ nir_io_semantics sem = nir_intrinsic_io_semantics(intrin);
+ sem.location += off;
+ /* non-indirect indexing should reduce num_slots */
+ sem.num_slots = is_dual_slot(intrin) ? 2 : 1;
+ nir_intrinsic_set_io_semantics(intrin, sem);
+
+ b->cursor = nir_before_instr(&intrin->instr);
+ nir_instr_rewrite_src(&intrin->instr, offset,
+ nir_src_for_ssa(nir_imm_int(b, 0)));
+ progress = true;
+ }
+ }
+ }
+
+ return progress;
+}
+
+bool
+nir_io_add_const_offset_to_base(nir_shader *nir, nir_variable_mode mode)
+{
+ bool progress = false;
+
+ nir_foreach_function(f, nir) {
+ if (f->impl) {
+ nir_builder b;
+ nir_builder_init(&b, f->impl);
+ nir_foreach_block(block, f->impl) {
+ progress |= add_const_offset_to_base_block(block, &b, mode);
+ }
+ }
+ }
+
+ return progress;
+}
+
projects / mesa.git / blobdiff