#include "list.h"
#include "glsl_parser_extras.h"
-struct ir_instruction;
struct _mesa_glsl_parse_state;
struct YYLTYPE;
+/**
+ * \defgroup AST Abstract syntax tree node definitions
+ *
+ * An abstract syntax tree is generated by the parser. This is a fairly
+ * direct representation of the gramma derivation for the source program.
+ * No symantic checking is done during the generation of the AST. Only
+ * syntactic checking is done. Symantic checking is performed by a later
+ * stage that converts the AST to a more generic intermediate representation.
+ *
+ *@{
+ */
+/**
+ * Base class of all abstract syntax tree nodes
+ */
class ast_node {
public:
- /* Callers of this talloc-based new need not call delete. It's
- * easier to just talloc_free 'ctx' (or any of its ancestors). */
+ /* Callers of this ralloc-based new need not call delete. It's
+ * easier to just ralloc_free 'ctx' (or any of its ancestors). */
static void* operator new(size_t size, void *ctx)
{
void *node;
- node = talloc_size(ctx, size);
+ node = rzalloc_size(ctx, size);
assert(node != NULL);
return node;
}
/* If the user *does* call delete, that's OK, we will just
- * talloc_free in that case. */
+ * ralloc_free in that case. */
static void operator delete(void *table)
{
- talloc_free(table);
+ ralloc_free(table);
}
+ /**
+ * Print an AST node in something approximating the original GLSL code
+ */
virtual void print(void) const;
+
+ /**
+ * Convert the AST node to the high-level intermediate representation
+ */
virtual ir_rvalue *hir(exec_list *instructions,
struct _mesa_glsl_parse_state *state);
this->location.column = locp.first_column;
}
+ /**
+ * Source location of the AST node.
+ */
struct {
- unsigned source;
- unsigned line;
- unsigned column;
+ unsigned source; /**< GLSL source number. */
+ unsigned line; /**< Line number within the source string. */
+ unsigned column; /**< Column in the line. */
} location;
exec_node link;
protected:
+ /**
+ * The only constructor is protected so that only derived class objects can
+ * be created.
+ */
ast_node(void);
};
+/**
+ * Operators for AST expression nodes.
+ */
enum ast_operators {
ast_assign,
ast_plus, /**< Unary + operator. */
ast_sequence
};
+/**
+ * Representation of any sort of expression.
+ */
class ast_expression : public ast_node {
public:
ast_expression(int oper, ast_expression *,
enum {
- ast_precision_high = 0, /**< Default precision. */
+ ast_precision_none = 0, /**< Absence of precision qualifier. */
+ ast_precision_high,
ast_precision_medium,
ast_precision_low
};
struct ast_type_qualifier {
- unsigned invariant:1;
- unsigned constant:1;
- unsigned attribute:1;
- unsigned varying:1;
- unsigned in:1;
- unsigned out:1;
- unsigned centroid:1;
- unsigned uniform:1;
- unsigned smooth:1;
- unsigned flat:1;
- unsigned noperspective:1;
+ union {
+ struct {
+ unsigned invariant:1;
+ unsigned constant:1;
+ unsigned attribute:1;
+ unsigned varying:1;
+ unsigned in:1;
+ unsigned out:1;
+ unsigned centroid:1;
+ unsigned uniform:1;
+ unsigned smooth:1;
+ unsigned flat:1;
+ unsigned noperspective:1;
+
+ /** \name Layout qualifiers for GL_ARB_fragment_coord_conventions */
+ /*@{*/
+ unsigned origin_upper_left:1;
+ unsigned pixel_center_integer:1;
+ /*@}*/
+
+ /**
+ * Flag set if GL_ARB_explicit_attrib_location "location" layout
+ * qualifier is used.
+ */
+ unsigned explicit_location:1;
+
+ /** \name Layout qualifiers for GL_AMD_conservative_depth */
+ /** \{ */
+ unsigned depth_any:1;
+ unsigned depth_greater:1;
+ unsigned depth_less:1;
+ unsigned depth_unchanged:1;
+ /** \} */
+ }
+ /** \brief Set of flags, accessed by name. */
+ q;
+
+ /** \brief Set of flags, accessed as a bitmask. */
+ unsigned i;
+ } flags;
+
+ /**
+ * Location specified via GL_ARB_explicit_attrib_location layout
+ *
+ * \note
+ * This field is only valid if \c explicit_location is set.
+ */
+ unsigned location;
+
+ /**
+ * Return true if and only if an interpolation qualifier is present.
+ */
+ bool has_interpolation() const;
+
+ /**
+ * \brief Return string representation of interpolation qualifier.
+ *
+ * If an interpolation qualifier is present, then return that qualifier's
+ * string representation. Otherwise, return null. For example, if the
+ * noperspective bit is set, then this returns "noperspective".
+ *
+ * If multiple interpolation qualifiers are somehow present, then the
+ * returned string is undefined but not null.
+ */
+ const char *interpolation_string() const;
};
class ast_struct_specifier : public ast_node {
/** Construct a type specifier from a type name */
ast_type_specifier(const char *name)
: type_specifier(ast_type_name), type_name(name), structure(NULL),
- is_array(false), array_size(NULL), precision(ast_precision_high)
+ is_array(false), array_size(NULL), precision(ast_precision_none),
+ is_precision_statement(false)
{
/* empty */
}
/** Construct a type specifier from a structure definition */
ast_type_specifier(ast_struct_specifier *s)
: type_specifier(ast_struct), type_name(s->name), structure(s),
- is_array(false), array_size(NULL), precision(ast_precision_high)
+ is_array(false), array_size(NULL), precision(ast_precision_none),
+ is_precision_statement(false)
{
/* empty */
}
ast_expression *array_size;
unsigned precision:2;
+
+ bool is_precision_statement;
};
class ast_parameter_declarator : public ast_node {
public:
+ ast_parameter_declarator()
+ {
+ this->identifier = NULL;
+ this->is_array = false;
+ this->array_size = 0;
+ }
+
virtual void print(void) const;
virtual ir_rvalue *hir(exec_list *instructions,
};
-class ast_declaration_statement : public ast_node {
-public:
- ast_declaration_statement(void);
-
- enum {
- ast_function,
- ast_declaration,
- ast_precision
- } mode;
-
- union {
- class ast_function *function;
- ast_declarator_list *declarator;
- ast_type_specifier *type;
- ast_node *node;
- } declaration;
-};
-
-
class ast_expression_statement : public ast_node {
public:
ast_expression_statement(ast_expression *);
ast_function *prototype;
ast_compound_statement *body;
};
-
+/*@}*/
extern void
_mesa_ast_to_hir(exec_list *instructions, struct _mesa_glsl_parse_state *state);
-extern struct ir_rvalue *
-_mesa_ast_field_selection_to_hir(const struct ast_expression *expr,
+extern ir_rvalue *
+_mesa_ast_field_selection_to_hir(const ast_expression *expr,
exec_list *instructions,
struct _mesa_glsl_parse_state *state);
+void
+emit_function(_mesa_glsl_parse_state *state, exec_list *instructions,
+ ir_function *f);
+
#endif /* AST_H */
projects / mesa.git / blobdiff