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glsl: add packed for struct types

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We need this for OpenCL kernels because we have to apply C rules for alignment
and padding inside structs and for this we also have to know if a struct is
packed or not.

v2: fix for kernel params

Signed-off-by: Karol Herbst <kherbst@redhat.com>
Reviewed-by: Erik Faye-Lund <erik.faye-lund@collabora.com>
This commit is contained in:
Karol Herbst 2018-03-04 19:06:24 +01:00 • committed by Karol Herbst
parent b98955e128
commit 659f333b3a
6 changed files with 49 additions and 12 deletions
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17
src/compiler/glsl_types.cpp
View file

@ -94,11 +94,11 @@ glsl_type::glsl_type(GLenum gl_type, glsl_base_type base_type,
}
glsl_type::glsl_type(const glsl_struct_field *fields, unsigned num_fields,
const char *name) :
const char *name, bool packed) :
gl_type(0),
base_type(GLSL_TYPE_STRUCT), sampled_type(GLSL_TYPE_VOID),
sampler_dimensionality(0), sampler_shadow(0), sampler_array(0),
interface_packing(0), interface_row_major(0),
interface_packing(0), interface_row_major(0), packed(packed),
vector_elements(0), matrix_columns(0),
length(num_fields), explicit_stride(0)
{
@ -1129,9 +1129,10 @@ glsl_type::record_key_hash(const void *a)
const glsl_type *
glsl_type::get_struct_instance(const glsl_struct_field *fields,
unsigned num_fields,
const char *name)
const char *name,
bool packed)
{
const glsl_type key(fields, num_fields, name);
const glsl_type key(fields, num_fields, name, packed);
mtx_lock(&glsl_type::hash_mutex);
@ -1143,7 +1144,7 @@ glsl_type::get_struct_instance(const glsl_struct_field *fields,
const struct hash_entry *entry = _mesa_hash_table_search(struct_types,
&key);
if (entry == NULL) {
const glsl_type *t = new glsl_type(fields, num_fields, name);
const glsl_type *t = new glsl_type(fields, num_fields, name, packed);
entry = _mesa_hash_table_insert(struct_types, t, (void *) t);
}
@ -1151,6 +1152,7 @@ glsl_type::get_struct_instance(const glsl_struct_field *fields,
assert(((glsl_type *) entry->data)->base_type == GLSL_TYPE_STRUCT);
assert(((glsl_type *) entry->data)->length == num_fields);
assert(strcmp(((glsl_type *) entry->data)->name, name) == 0);
assert(((glsl_type *) entry->data)->packed == packed);
mtx_unlock(&glsl_type::hash_mutex);
@ -2447,6 +2449,8 @@ encode_type_to_blob(struct blob *blob, const glsl_type *type)
if (type->is_interface()) {
blob_write_uint32(blob, type->interface_packing);
blob_write_uint32(blob, type->interface_row_major);
} else {
blob_write_uint32(blob, type->packed);
}
return;
case GLSL_TYPE_VOID:
@ -2535,7 +2539,8 @@ decode_type_from_blob(struct blob_reader *blob)
t = glsl_type::get_interface_instance(fields, num_fields, packing,
row_major, name);
} else {
t = glsl_type::get_struct_instance(fields, num_fields, name);
unsigned packed = blob_read_uint32(blob);
t = glsl_type::get_struct_instance(fields, num_fields, name, packed);
}
free(fields);

12
src/compiler/glsl_types.h
View file

@ -176,6 +176,13 @@ struct glsl_type {
unsigned interface_packing:2;
unsigned interface_row_major:1;
/**
* For \c GLSL_TYPE_STRUCT this specifies if the struct is packed or not.
*
* Only used for Compute kernels
*/
unsigned packed:1;
private:
glsl_type() : mem_ctx(NULL)
{
@ -314,7 +321,8 @@ public:
*/
static const glsl_type *get_struct_instance(const glsl_struct_field *fields,
unsigned num_fields,
const char *name);
const char *name,
bool packed = false);
/**
* Get the instance of an interface block type
@ -946,7 +954,7 @@ private:
/** Constructor for record types */
glsl_type(const glsl_struct_field *fields, unsigned num_fields,
const char *name);
const char *name, bool packed = false);
/** Constructor for interface types */
glsl_type(const glsl_struct_field *fields, unsigned num_fields,

5
src/compiler/nir_types.cpp
View file

@ -510,9 +510,10 @@ glsl_array_type(const glsl_type *base, unsigned elements,
const glsl_type *
glsl_struct_type(const glsl_struct_field *fields,
unsigned num_fields, const char *name)
unsigned num_fields, const char *name,
bool packed)
{
return glsl_type::get_struct_instance(fields, num_fields, name);
return glsl_type::get_struct_instance(fields, num_fields, name, packed);
}
const glsl_type *

3
src/compiler/nir_types.h
View file

@ -193,7 +193,8 @@ const struct glsl_type *glsl_array_type(const struct glsl_type *base,
unsigned explicit_stride);
const struct glsl_type *glsl_struct_type(const struct glsl_struct_field *fields,
unsigned num_fields, const char *name);
unsigned num_fields, const char *name,
bool packed);
const struct glsl_type *glsl_interface_type(const struct glsl_struct_field *fields,
unsigned num_fields,
enum glsl_interface_packing packing,

17
src/compiler/spirv/spirv_to_nir.c
View file

@ -819,6 +819,13 @@ struct_member_decoration_cb(struct vtn_builder *b,
break;
case SpvDecorationCPacked:
if (b->shader->info.stage != MESA_SHADER_KERNEL)
vtn_warn("Decoration only allowed for CL-style kernels: %s",
spirv_decoration_to_string(dec->decoration));
else
ctx->type->packed = true;
break;
case SpvDecorationSaturatedConversion:
case SpvDecorationFuncParamAttr:
case SpvDecorationFPRoundingMode:
@ -979,6 +986,13 @@ type_decoration_cb(struct vtn_builder *b,
break;
case SpvDecorationCPacked:
if (b->shader->info.stage != MESA_SHADER_KERNEL)
vtn_warn("Decoration only allowed for CL-style kernels: %s",
spirv_decoration_to_string(dec->decoration));
else
type->packed = true;
break;
case SpvDecorationSaturatedConversion:
case SpvDecorationFuncParamAttr:
case SpvDecorationFPRoundingMode:
@ -1242,6 +1256,7 @@ vtn_handle_type(struct vtn_builder *b, SpvOp opcode,
val->type->length = num_fields;
val->type->members = ralloc_array(b, struct vtn_type *, num_fields);
val->type->offsets = ralloc_array(b, unsigned, num_fields);
val->type->packed = false;
NIR_VLA(struct glsl_struct_field, fields, count);
for (unsigned i = 0; i < num_fields; i++) {
@ -1266,7 +1281,7 @@ vtn_handle_type(struct vtn_builder *b, SpvOp opcode,
const char *name = val->name ? val->name : "struct";
val->type->type = glsl_struct_type(fields, num_fields, name);
val->type->type = glsl_struct_type(fields, num_fields, name, false);
break;
}

7
src/compiler/spirv/vtn_private.h
View file

@ -335,6 +335,13 @@ struct vtn_type {
* (i.e. a block that contains only builtins).
*/
bool builtin_block:1;
/* for structs and unions it specifies the minimum alignment of the
* members. 0 means packed.
*
* Set by CPacked and Alignment Decorations in kernels.
*/
bool packed:1;
};
/* Members for pointer types */