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authorFrancisco Jerez <currojerez@riseup.net>2013-10-20 12:38:07 -0700
committerIan Romanick <ian.d.romanick@intel.com>2013-11-07 15:56:57 -0800
commite63bb298531918c3a17e77a9ad96670e724c9c37 (patch)
tree9181aa991c227472ebb5d4a225e2c6dd7c811369 /src/glsl
parent30f61c471de5a9637e5d830e2b5b9dc4145f94d2 (diff)
glsl: Implement parser support for atomic counters.
v2: Mark atomic counters as read-only variables. Move offset overlap code to the linker. Use the contains_atomic() convenience method. v3: Use pointer to integer instead of non-const reference. Add comment so we remember to add a spec quotation from the next GLSL release once the issue of atomic counter aggregation within structures is clarified. v4 (idr): Don't use std::map because it's overkill. Add an assertion that ctx->Const.MaxAtomicBufferBindings <= MAX_COMBINED_ATOMIC_BUFFERS. Signed-off-by: Francisco Jerez <currojerez@riseup.net> Signed-off-by: Ian Romanick <ian.d.romanick@intel.com> Reviewed-by: Paul Berry <stereotype441@gmail.com> Reviewed-by: Ian Romanick <ian.d.romanick@intel.com>
Diffstat (limited to 'src/glsl')
-rw-r--r--src/glsl/ast.h15
-rw-r--r--src/glsl/ast_to_hir.cpp63
-rw-r--r--src/glsl/ast_type.cpp13
-rw-r--r--src/glsl/glsl_lexer.ll2
-rw-r--r--src/glsl/glsl_parser.yy13
-rw-r--r--src/glsl/glsl_parser_extras.h3
6 files changed, 103 insertions, 6 deletions
diff --git a/src/glsl/ast.h b/src/glsl/ast.h
index 97905c6a6d1..5c214b6043b 100644
--- a/src/glsl/ast.h
+++ b/src/glsl/ast.h
@@ -385,6 +385,12 @@ struct ast_type_qualifier {
*/
unsigned explicit_binding:1;
+ /**
+ * Flag set if GL_ARB_shader_atomic counter "offset" layout
+ * qualifier is used.
+ */
+ unsigned explicit_offset:1;
+
/** \name Layout qualifiers for GL_AMD_conservative_depth */
/** \{ */
unsigned depth_any:1;
@@ -448,6 +454,15 @@ struct ast_type_qualifier {
int binding;
/**
+ * Offset specified via GL_ARB_shader_atomic_counter's "offset"
+ * keyword.
+ *
+ * \note
+ * This field is only valid if \c explicit_offset is set.
+ */
+ int offset;
+
+ /**
* Return true if and only if an interpolation qualifier is present.
*/
bool has_interpolation() const;
diff --git a/src/glsl/ast_to_hir.cpp b/src/glsl/ast_to_hir.cpp
index f75e68ce192..76b256c731a 100644
--- a/src/glsl/ast_to_hir.cpp
+++ b/src/glsl/ast_to_hir.cpp
@@ -1997,10 +1997,20 @@ validate_binding_qualifier(struct _mesa_glsl_parse_state *state,
return false;
}
+ } else if (var->type->contains_atomic()) {
+ assert(ctx->Const.MaxAtomicBufferBindings <= MAX_COMBINED_ATOMIC_BUFFERS);
+ if (unsigned(qual->binding) >= ctx->Const.MaxAtomicBufferBindings) {
+ _mesa_glsl_error(loc, state, "layout(binding = %d) exceeds the "
+ " maximum number of atomic counter buffer bindings"
+ "(%d)", qual->binding,
+ ctx->Const.MaxAtomicBufferBindings);
+
+ return false;
+ }
} else {
_mesa_glsl_error(loc, state,
"the \"binding\" qualifier only applies to uniform "
- "blocks, samplers, or arrays of samplers");
+ "blocks, samplers, atomic counters, or arrays thereof");
return false;
}
@@ -2300,6 +2310,29 @@ apply_type_qualifier_to_variable(const struct ast_type_qualifier *qual,
var->binding = qual->binding;
}
+ if (var->type->contains_atomic()) {
+ if (var->mode == ir_var_uniform) {
+ if (var->explicit_binding) {
+ unsigned *offset = &state->atomic_counter_offsets[var->binding];
+
+ if (*offset % ATOMIC_COUNTER_SIZE)
+ _mesa_glsl_error(loc, state,
+ "misaligned atomic counter offset");
+
+ var->atomic.offset = *offset;
+ *offset += var->type->atomic_size();
+
+ } else {
+ _mesa_glsl_error(loc, state,
+ "atomic counters require explicit binding point");
+ }
+ } else if (var->mode != ir_var_function_in) {
+ _mesa_glsl_error(loc, state, "atomic counters may only be declared as "
+ "function parameters or uniform-qualified "
+ "global variables");
+ }
+ }
+
/* Does the declaration use the deprecated 'attribute' or 'varying'
* keywords?
*/
@@ -2835,6 +2868,18 @@ ast_declarator_list::hir(exec_list *instructions,
(void) this->type->specifier->hir(instructions, state);
decl_type = this->type->glsl_type(& type_name, state);
+
+ /* An offset-qualified atomic counter declaration sets the default
+ * offset for the next declaration within the same atomic counter
+ * buffer.
+ */
+ if (decl_type && decl_type->contains_atomic()) {
+ if (type->qualifier.flags.q.explicit_binding &&
+ type->qualifier.flags.q.explicit_offset)
+ state->atomic_counter_offsets[type->qualifier.binding] =
+ type->qualifier.offset;
+ }
+
if (this->declarations.is_empty()) {
/* If there is no structure involved in the program text, there are two
* possible scenarios:
@@ -2864,6 +2909,11 @@ ast_declarator_list::hir(exec_list *instructions,
_mesa_glsl_error(&loc, state,
"invalid type `%s' in empty declaration",
type_name);
+ } else if (decl_type->base_type == GLSL_TYPE_ATOMIC_UINT) {
+ /* Empty atomic counter declarations are allowed and useful
+ * to set the default offset qualifier.
+ */
+ return NULL;
} else if (this->type->qualifier.precision != ast_precision_none) {
if (this->type->specifier->structure != NULL) {
_mesa_glsl_error(&loc, state,
@@ -4565,6 +4615,17 @@ ast_process_structure_or_interface_block(exec_list *instructions,
"uniform in non-default uniform block contains sampler");
}
+ if (field_type->contains_atomic()) {
+ /* FINISHME: Add a spec quotation here once updated spec
+ * FINISHME: language is available. See Khronos bug #10903
+ * FINISHME: on whether atomic counters are allowed in
+ * FINISHME: structures.
+ */
+ YYLTYPE loc = decl_list->get_location();
+ _mesa_glsl_error(&loc, state, "atomic counter in structure or "
+ "uniform block");
+ }
+
const struct ast_type_qualifier *const qual =
& decl_list->type->qualifier;
if (qual->flags.q.std140 ||
diff --git a/src/glsl/ast_type.cpp b/src/glsl/ast_type.cpp
index 8aabd95f999..2b088bf8b85 100644
--- a/src/glsl/ast_type.cpp
+++ b/src/glsl/ast_type.cpp
@@ -72,7 +72,8 @@ ast_type_qualifier::has_layout() const
|| this->flags.q.packed
|| this->flags.q.explicit_location
|| this->flags.q.explicit_index
- || this->flags.q.explicit_binding;
+ || this->flags.q.explicit_binding
+ || this->flags.q.explicit_offset;
}
bool
@@ -121,13 +122,18 @@ ast_type_qualifier::merge_qualifier(YYLTYPE *loc,
ubo_layout_mask.flags.q.packed = 1;
ubo_layout_mask.flags.q.shared = 1;
+ ast_type_qualifier ubo_binding_mask;
+ ubo_binding_mask.flags.q.explicit_binding = 1;
+ ubo_binding_mask.flags.q.explicit_offset = 1;
+
/* Uniform block layout qualifiers get to overwrite each
* other (rightmost having priority), while all other
* qualifiers currently don't allow duplicates.
*/
if ((this->flags.i & q.flags.i & ~(ubo_mat_mask.flags.i |
- ubo_layout_mask.flags.i)) != 0) {
+ ubo_layout_mask.flags.i |
+ ubo_binding_mask.flags.i)) != 0) {
_mesa_glsl_error(loc, state,
"duplicate layout qualifiers used");
return false;
@@ -168,6 +174,9 @@ ast_type_qualifier::merge_qualifier(YYLTYPE *loc,
if (q.flags.q.explicit_binding)
this->binding = q.binding;
+ if (q.flags.q.explicit_offset)
+ this->offset = q.offset;
+
if (q.precision != ast_precision_none)
this->precision = q.precision;
diff --git a/src/glsl/glsl_lexer.ll b/src/glsl/glsl_lexer.ll
index e24df8096c3..822d70d6b66 100644
--- a/src/glsl/glsl_lexer.ll
+++ b/src/glsl/glsl_lexer.ll
@@ -337,6 +337,7 @@ samplerExternalOES {
return IDENTIFIER;
}
+atomic_uint KEYWORD_WITH_ALT(420, 300, 420, 0, yyextra->ARB_shader_atomic_counters_enable, ATOMIC_UINT);
struct return STRUCT;
void return VOID_TOK;
@@ -518,7 +519,6 @@ restrict KEYWORD(0, 300, 0, 0, RESTRICT);
readonly KEYWORD(0, 300, 0, 0, READONLY);
writeonly KEYWORD(0, 300, 0, 0, WRITEONLY);
resource KEYWORD(0, 300, 0, 0, RESOURCE);
-atomic_uint KEYWORD(0, 300, 0, 0, ATOMIC_UINT);
patch KEYWORD(0, 300, 0, 0, PATCH);
sample KEYWORD(0, 300, 0, 0, SAMPLE);
subroutine KEYWORD(0, 300, 0, 0, SUBROUTINE);
diff --git a/src/glsl/glsl_parser.yy b/src/glsl/glsl_parser.yy
index 14420f8a36c..ada3690f609 100644
--- a/src/glsl/glsl_parser.yy
+++ b/src/glsl/glsl_parser.yy
@@ -144,6 +144,7 @@ static bool match_layout_qualifier(const char *s1, const char *s2,
%token SAMPLER2DMS ISAMPLER2DMS USAMPLER2DMS
%token SAMPLER2DMSARRAY ISAMPLER2DMSARRAY USAMPLER2DMSARRAY
%token SAMPLEREXTERNALOES
+%token ATOMIC_UINT
%token STRUCT VOID_TOK WHILE
%token <identifier> IDENTIFIER TYPE_IDENTIFIER NEW_IDENTIFIER
%type <identifier> any_identifier
@@ -173,7 +174,7 @@ static bool match_layout_qualifier(const char *s1, const char *s2,
%token HVEC2 HVEC3 HVEC4 DVEC2 DVEC3 DVEC4 FVEC2 FVEC3 FVEC4
%token SAMPLER3DRECT
%token SIZEOF CAST NAMESPACE USING
-%token COHERENT RESTRICT READONLY WRITEONLY RESOURCE ATOMIC_UINT PATCH SAMPLE
+%token COHERENT RESTRICT READONLY WRITEONLY RESOURCE PATCH SAMPLE
%token SUBROUTINE
%token ERROR_TOK
@@ -1324,12 +1325,19 @@ layout_qualifier_id:
}
}
- if (state->ARB_shading_language_420pack_enable &&
+ if ((state->ARB_shading_language_420pack_enable ||
+ state->ARB_shader_atomic_counters_enable) &&
match_layout_qualifier("binding", $1, state) == 0) {
$$.flags.q.explicit_binding = 1;
$$.binding = $3;
}
+ if (state->ARB_shader_atomic_counters_enable &&
+ match_layout_qualifier("offset", $1, state) == 0) {
+ $$.flags.q.explicit_offset = 1;
+ $$.offset = $3;
+ }
+
if (match_layout_qualifier("max_vertices", $1, state) == 0) {
$$.flags.q.max_vertices = 1;
@@ -1703,6 +1711,7 @@ basic_type_specifier_nonarray:
| SAMPLER2DMSARRAY { $$ = "sampler2DMSArray"; }
| ISAMPLER2DMSARRAY { $$ = "isampler2DMSArray"; }
| USAMPLER2DMSARRAY { $$ = "usampler2DMSArray"; }
+ | ATOMIC_UINT { $$ = "atomic_uint"; }
;
precision_qualifier:
diff --git a/src/glsl/glsl_parser_extras.h b/src/glsl/glsl_parser_extras.h
index 345d7a0187e..d232bb3f66d 100644
--- a/src/glsl/glsl_parser_extras.h
+++ b/src/glsl/glsl_parser_extras.h
@@ -373,6 +373,9 @@ struct _mesa_glsl_parse_state {
* Unused for other shader types.
*/
unsigned gs_input_size;
+
+ /** Atomic counter offsets by binding */
+ unsigned atomic_counter_offsets[MAX_COMBINED_ATOMIC_BUFFERS];
};
# define YYLLOC_DEFAULT(Current, Rhs, N) \