[Mesa-dev] [PATCH v3 2/10] glsl: keep track of ssbo variable being accessed, add access params
Ilia Mirkin
imirkin at alum.mit.edu
Mon Jan 18 22:50:07 PST 2016
Currently any access params (coherent/volatile/restrict) are being lost
when lowering to the ssbo load/store intrinsics. Keep track of the
variable being used, and bake its access params in as the last arg of
the load/store intrinsics.
Sometimes the variable being accessed is the actual block itself, in the
case of named blocks. In that case, retrieve the field struct and use
its parameters.
Signed-off-by: Ilia Mirkin <imirkin at alum.mit.edu>
Reviewed-by: Marek Olšák <marek.olsak at amd.com> (v1)
Reviewed-by: Iago Toral Quiroga <itoral at igalia.com> (v1)
v1 -> v2: add tracking of struct field
---
(Only resent these two patches... not the whole series.)
src/glsl/lower_buffer_access.cpp | 8 +++++++-
src/glsl/lower_buffer_access.h | 1 +
src/glsl/lower_shared_reference.cpp | 6 +++---
src/glsl/lower_ubo_reference.cpp | 32 +++++++++++++++++++++++++++++++-
src/glsl/nir/shader_enums.h | 10 ++++++++++
5 files changed, 52 insertions(+), 5 deletions(-)
diff --git a/src/glsl/lower_buffer_access.cpp b/src/glsl/lower_buffer_access.cpp
index f8c8d14..0b0bd31 100644
--- a/src/glsl/lower_buffer_access.cpp
+++ b/src/glsl/lower_buffer_access.cpp
@@ -327,11 +327,14 @@ lower_buffer_access::setup_buffer_access(void *mem_ctx,
unsigned *const_offset,
bool *row_major,
int *matrix_columns,
+ const glsl_struct_field **struct_field,
unsigned packing)
{
*offset = new(mem_ctx) ir_constant(0u);
*row_major = is_dereferenced_thing_row_major(deref);
*matrix_columns = 1;
+ if (struct_field)
+ *struct_field = NULL;
/* Calculate the offset to the start of the region of the UBO
* dereferenced by *rvalue. This may be a variable offset if an
@@ -442,8 +445,11 @@ lower_buffer_access::setup_buffer_access(void *mem_ctx,
intra_struct_offset = glsl_align(intra_struct_offset, field_align);
if (strcmp(struct_type->fields.structure[i].name,
- deref_record->field) == 0)
+ deref_record->field) == 0) {
+ if (struct_field)
+ *struct_field = &struct_type->fields.structure[i];
break;
+ }
if (packing == GLSL_INTERFACE_PACKING_STD430)
intra_struct_offset += type->std430_size(field_row_major);
diff --git a/src/glsl/lower_buffer_access.h b/src/glsl/lower_buffer_access.h
index cc4614e..8772bdb 100644
--- a/src/glsl/lower_buffer_access.h
+++ b/src/glsl/lower_buffer_access.h
@@ -57,6 +57,7 @@ public:
void setup_buffer_access(void *mem_ctx, ir_variable *var, ir_rvalue *deref,
ir_rvalue **offset, unsigned *const_offset,
bool *row_major, int *matrix_columns,
+ const glsl_struct_field **struct_field,
unsigned packing);
};
diff --git a/src/glsl/lower_shared_reference.cpp b/src/glsl/lower_shared_reference.cpp
index 533cd92..1249969 100644
--- a/src/glsl/lower_shared_reference.cpp
+++ b/src/glsl/lower_shared_reference.cpp
@@ -142,7 +142,7 @@ lower_shared_reference_visitor::handle_rvalue(ir_rvalue **rvalue)
setup_buffer_access(mem_ctx, var, deref,
&offset, &const_offset,
- &row_major, &matrix_columns, packing);
+ &row_major, &matrix_columns, NULL, packing);
/* Now that we've calculated the offset to the start of the
* dereference, walk over the type and emit loads into a temporary.
@@ -210,7 +210,7 @@ lower_shared_reference_visitor::handle_assignment(ir_assignment *ir)
setup_buffer_access(mem_ctx, var, deref,
&offset, &const_offset,
- &row_major, &matrix_columns, packing);
+ &row_major, &matrix_columns, NULL, packing);
deref = new(mem_ctx) ir_dereference_variable(store_var);
@@ -370,7 +370,7 @@ lower_shared_reference_visitor::lower_shared_atomic_intrinsic(ir_call *ir)
setup_buffer_access(mem_ctx, var, deref,
&offset, &const_offset,
- &row_major, &matrix_columns, packing);
+ &row_major, &matrix_columns, NULL, packing);
assert(offset);
assert(!row_major);
diff --git a/src/glsl/lower_ubo_reference.cpp b/src/glsl/lower_ubo_reference.cpp
index a172054..d9d2928 100644
--- a/src/glsl/lower_ubo_reference.cpp
+++ b/src/glsl/lower_ubo_reference.cpp
@@ -60,6 +60,7 @@ public:
bool *row_major,
int *matrix_columns,
unsigned packing);
+ uint32_t ssbo_access_params();
ir_expression *ubo_load(void *mem_ctx, const struct glsl_type *type,
ir_rvalue *offset);
ir_call *ssbo_load(void *mem_ctx, const struct glsl_type *type,
@@ -104,6 +105,8 @@ public:
struct gl_shader *shader;
struct gl_uniform_buffer_variable *ubo_var;
+ const struct glsl_struct_field *struct_field;
+ ir_variable *variable;
ir_rvalue *uniform_block;
bool progress;
};
@@ -289,7 +292,7 @@ lower_ubo_reference_visitor::setup_for_load_or_store(void *mem_ctx,
*const_offset = ubo_var->Offset;
setup_buffer_access(mem_ctx, var, deref, offset, const_offset, row_major,
- matrix_columns, packing);
+ matrix_columns, &this->struct_field, packing);
}
void
@@ -317,6 +320,7 @@ lower_ubo_reference_visitor::handle_rvalue(ir_rvalue **rvalue)
this->buffer_access_type =
var->is_in_shader_storage_block() ?
ssbo_load_access : ubo_load_access;
+ this->variable = var;
/* Compute the offset to the start if the dereference as well as other
* information we need to configure the write
@@ -370,6 +374,19 @@ shader_storage_buffer_object(const _mesa_glsl_parse_state *state)
return state->ARB_shader_storage_buffer_object_enable;
}
+uint32_t
+lower_ubo_reference_visitor::ssbo_access_params()
+{
+ if (variable->is_interface_instance())
+ return ((struct_field->image_coherent ? ACCESS_COHERENT : 0) |
+ (struct_field->image_restrict ? ACCESS_RESTRICT : 0) |
+ (struct_field->image_volatile ? ACCESS_VOLATILE : 0));
+ else
+ return ((variable->data.image_coherent ? ACCESS_COHERENT : 0) |
+ (variable->data.image_restrict ? ACCESS_RESTRICT : 0) |
+ (variable->data.image_volatile ? ACCESS_VOLATILE : 0));
+}
+
ir_call *
lower_ubo_reference_visitor::ssbo_store(void *mem_ctx,
ir_rvalue *deref,
@@ -394,6 +411,10 @@ lower_ubo_reference_visitor::ssbo_store(void *mem_ctx,
ir_variable(glsl_type::uint_type, "write_mask" , ir_var_function_in);
sig_params.push_tail(writemask_ref);
+ ir_variable *access_ref = new(mem_ctx)
+ ir_variable(glsl_type::uint_type, "access" , ir_var_function_in);
+ sig_params.push_tail(access_ref);
+
ir_function_signature *sig = new(mem_ctx)
ir_function_signature(glsl_type::void_type, shader_storage_buffer_object);
assert(sig);
@@ -408,6 +429,7 @@ lower_ubo_reference_visitor::ssbo_store(void *mem_ctx,
call_params.push_tail(offset->clone(mem_ctx, NULL));
call_params.push_tail(deref->clone(mem_ctx, NULL));
call_params.push_tail(new(mem_ctx) ir_constant(write_mask));
+ call_params.push_tail(new(mem_ctx) ir_constant(ssbo_access_params()));
return new(mem_ctx) ir_call(sig, NULL, &call_params);
}
@@ -426,6 +448,10 @@ lower_ubo_reference_visitor::ssbo_load(void *mem_ctx,
ir_variable(glsl_type::uint_type, "offset_ref" , ir_var_function_in);
sig_params.push_tail(offset_ref);
+ ir_variable *access_ref = new(mem_ctx)
+ ir_variable(glsl_type::uint_type, "access" , ir_var_function_in);
+ sig_params.push_tail(access_ref);
+
ir_function_signature *sig =
new(mem_ctx) ir_function_signature(type, shader_storage_buffer_object);
assert(sig);
@@ -444,6 +470,7 @@ lower_ubo_reference_visitor::ssbo_load(void *mem_ctx,
exec_list call_params;
call_params.push_tail(this->uniform_block->clone(mem_ctx, NULL));
call_params.push_tail(offset->clone(mem_ctx, NULL));
+ call_params.push_tail(new(mem_ctx) ir_constant(ssbo_access_params()));
return new(mem_ctx) ir_call(sig, deref_result, &call_params);
}
@@ -499,6 +526,7 @@ lower_ubo_reference_visitor::write_to_memory(void *mem_ctx,
unsigned packing = var->get_interface_type()->interface_packing;
this->buffer_access_type = ssbo_store_access;
+ this->variable = var;
/* Compute the offset to the start if the dereference as well as other
* information we need to configure the write
@@ -678,6 +706,7 @@ lower_ubo_reference_visitor::process_ssbo_unsized_array_length(ir_rvalue **rvalu
int unsized_array_stride = calculate_unsized_array_stride(deref, packing);
this->buffer_access_type = ssbo_unsized_array_length_access;
+ this->variable = var;
/* Compute the offset to the start if the dereference as well as other
* information we need to calculate the length.
@@ -910,6 +939,7 @@ lower_ubo_reference_visitor::lower_ssbo_atomic_intrinsic(ir_call *ir)
unsigned packing = var->get_interface_type()->interface_packing;
this->buffer_access_type = ssbo_atomic_access;
+ this->variable = var;
setup_for_load_or_store(mem_ctx, var, deref,
&offset, &const_offset,
diff --git a/src/glsl/nir/shader_enums.h b/src/glsl/nir/shader_enums.h
index c747464..19610c9 100644
--- a/src/glsl/nir/shader_enums.h
+++ b/src/glsl/nir/shader_enums.h
@@ -535,6 +535,16 @@ enum gl_frag_depth_layout
FRAG_DEPTH_LAYOUT_UNCHANGED
};
+/**
+ * \brief Buffer access qualifiers
+ */
+enum gl_buffer_access_qualifier
+{
+ ACCESS_COHERENT = 1,
+ ACCESS_RESTRICT = 2,
+ ACCESS_VOLATILE = 4,
+};
+
#ifdef __cplusplus
} /* extern "C" */
#endif
--
2.4.10
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