mesa/ast.h

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2010-03-10 21:58:12 +00:00
/* -*- c++ -*- */
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/*
* Copyright © 2009 Intel Corporation
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice (including the next
* paragraph) shall be included in all copies or substantial portions of the
* Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
* DEALINGS IN THE SOFTWARE.
*/
#pragma once
#ifndef AST_H
#define AST_H
#include "main/simple_list.h"
#include "list.h"
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#include "glsl_parser_extras.h"
struct ir_instruction;
struct _mesa_glsl_parse_state;
struct YYLTYPE;
class ast_node : public simple_node {
public:
virtual ~ast_node();
virtual void print(void) const;
virtual ir_rvalue *hir(exec_list *instructions,
struct _mesa_glsl_parse_state *state);
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/**
* Retrieve the source location of an AST node
*
* This function is primarily used to get the source position of an AST node
* into a form that can be passed to \c _mesa_glsl_error.
*
* \sa _mesa_glsl_error, ast_node::set_location
*/
struct YYLTYPE get_location(void) const
{
struct YYLTYPE locp;
locp.source = this->location.source;
locp.first_line = this->location.line;
locp.first_column = this->location.column;
locp.last_line = locp.first_line;
locp.last_column = locp.first_column;
return locp;
}
/**
* Set the source location of an AST node from a parser location
*
* \sa ast_node::get_location
*/
void set_location(const struct YYLTYPE *locp)
{
this->location.source = locp->source;
this->location.line = locp->first_line;
this->location.column = locp->first_column;
}
int type;
struct {
unsigned source;
unsigned line;
unsigned column;
} location;
protected:
ast_node(void);
};
enum ast_operators {
ast_assign,
ast_plus, /**< Unary + operator. */
ast_neg,
ast_add,
ast_sub,
ast_mul,
ast_div,
ast_mod,
ast_lshift,
ast_rshift,
ast_less,
ast_greater,
ast_lequal,
ast_gequal,
ast_equal,
ast_nequal,
ast_bit_and,
ast_bit_xor,
ast_bit_or,
ast_bit_not,
ast_logic_and,
ast_logic_xor,
ast_logic_or,
ast_logic_not,
ast_mul_assign,
ast_div_assign,
ast_mod_assign,
ast_add_assign,
ast_sub_assign,
ast_ls_assign,
ast_rs_assign,
ast_and_assign,
ast_xor_assign,
ast_or_assign,
ast_conditional,
ast_pre_inc,
ast_pre_dec,
ast_post_inc,
ast_post_dec,
ast_field_selection,
ast_array_index,
ast_function_call,
ast_identifier,
ast_int_constant,
ast_uint_constant,
ast_float_constant,
ast_bool_constant,
ast_sequence
};
class ast_expression : public ast_node {
public:
ast_expression(int oper, ast_expression *,
ast_expression *, ast_expression *);
ast_expression(const char *identifier) :
oper(ast_identifier)
{
subexpressions[0] = NULL;
subexpressions[1] = NULL;
subexpressions[2] = NULL;
primary_expression.identifier = (char *) identifier;
}
static const char *operator_string(enum ast_operators op);
virtual ir_rvalue *hir(exec_list *instructions,
struct _mesa_glsl_parse_state *state);
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virtual void print(void) const;
enum ast_operators oper;
ast_expression *subexpressions[3];
union {
char *identifier;
int int_constant;
float float_constant;
unsigned uint_constant;
int bool_constant;
} primary_expression;
/**
* List of expressions for an \c ast_sequence.
*/
struct simple_node expressions;
};
class ast_expression_bin : public ast_expression {
public:
ast_expression_bin(int oper, ast_expression *, ast_expression *);
virtual void print(void) const;
};
/**
* Subclass of expressions for function calls
*/
class ast_function_expression : public ast_expression {
public:
ast_function_expression(ast_expression *callee)
: ast_expression(ast_function_call, callee,
NULL, NULL),
cons(false)
{
/* empty */
}
ast_function_expression(class ast_type_specifier *type)
: ast_expression(ast_function_call, (ast_expression *) type,
NULL, NULL),
cons(true)
{
/* empty */
}
bool is_constructor() const
{
return cons;
}
virtual ir_rvalue *hir(exec_list *instructions,
struct _mesa_glsl_parse_state *state);
private:
/**
* Is this function call actually a constructor?
*/
bool cons;
};
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/**
* Number of possible operators for an ast_expression
*
* This is done as a define instead of as an additional value in the enum so
* that the compiler won't generate spurious messages like "warning:
* enumeration value ast_num_operators not handled in switch"
*/
#define AST_NUM_OPERATORS (ast_sequence + 1)
class ast_compound_statement : public ast_node {
public:
ast_compound_statement(int new_scope, ast_node *statements);
virtual void print(void) const;
virtual ir_rvalue *hir(exec_list *instructions,
struct _mesa_glsl_parse_state *state);
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int new_scope;
struct simple_node statements;
};
class ast_declaration : public ast_node {
public:
ast_declaration(char *identifier, int is_array, ast_expression *array_size,
ast_expression *initializer);
virtual void print(void) const;
char *identifier;
int is_array;
ast_expression *array_size;
ast_expression *initializer;
};
enum {
ast_precision_high = 0, /**< Default precision. */
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;
};
class ast_struct_specifier : public ast_node {
public:
ast_struct_specifier(char *identifier, ast_node *declarator_list);
virtual void print(void) const;
char *name;
struct simple_node declarations;
};
enum ast_types {
ast_void,
ast_float,
ast_int,
ast_uint,
ast_bool,
ast_vec2,
ast_vec3,
ast_vec4,
ast_bvec2,
ast_bvec3,
ast_bvec4,
ast_ivec2,
ast_ivec3,
ast_ivec4,
ast_uvec2,
ast_uvec3,
ast_uvec4,
ast_mat2,
ast_mat2x3,
ast_mat2x4,
ast_mat3x2,
ast_mat3,
ast_mat3x4,
ast_mat4x2,
ast_mat4x3,
ast_mat4,
ast_sampler1d,
ast_sampler2d,
ast_sampler3d,
ast_samplercube,
ast_sampler1dshadow,
ast_sampler2dshadow,
ast_samplercubeshadow,
ast_sampler1darray,
ast_sampler2darray,
ast_sampler1darrayshadow,
ast_sampler2darrayshadow,
ast_isampler1d,
ast_isampler2d,
ast_isampler3d,
ast_isamplercube,
ast_isampler1darray,
ast_isampler2darray,
ast_usampler1d,
ast_usampler2d,
ast_usampler3d,
ast_usamplercube,
ast_usampler1darray,
ast_usampler2darray,
ast_struct,
ast_type_name
};
class ast_type_specifier : public ast_node {
public:
ast_type_specifier(int specifier);
/** 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)
{
/* 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)
{
/* empty */
}
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virtual void print(void) const;
enum ast_types type_specifier;
const char *type_name;
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ast_struct_specifier *structure;
int is_array;
ast_expression *array_size;
unsigned precision:2;
};
class ast_fully_specified_type : public ast_node {
public:
virtual void print(void) const;
ast_type_qualifier qualifier;
ast_type_specifier *specifier;
};
class ast_declarator_list : public ast_node {
public:
ast_declarator_list(ast_fully_specified_type *);
virtual void print(void) const;
virtual ir_rvalue *hir(exec_list *instructions,
struct _mesa_glsl_parse_state *state);
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ast_fully_specified_type *type;
struct simple_node declarations;
/**
* Special flag for vertex shader "invariant" declarations.
*
* Vertex shaders can contain "invariant" variable redeclarations that do
* not include a type. For example, "invariant gl_Position;". This flag
* is used to note these cases when no type is specified.
*/
int invariant;
};
class ast_parameter_declarator : public ast_node {
public:
virtual void print(void) const;
virtual ir_rvalue *hir(exec_list *instructions,
struct _mesa_glsl_parse_state *state);
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ast_fully_specified_type *type;
char *identifier;
int is_array;
ast_expression *array_size;
};
class ast_function : public ast_node {
public:
ast_function(void);
virtual void print(void) const;
ast_fully_specified_type *return_type;
char *identifier;
struct simple_node parameters;
};
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 *);
virtual void print(void) const;
virtual ir_rvalue *hir(exec_list *instructions,
struct _mesa_glsl_parse_state *state);
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ast_expression *expression;
};
class ast_case_label : public ast_node {
public:
/**
* An expression of NULL means 'default'.
*/
ast_expression *expression;
};
class ast_selection_statement : public ast_node {
public:
ast_selection_statement(ast_expression *condition,
ast_node *then_statement,
ast_node *else_statement);
virtual void print(void) const;
ast_expression *condition;
ast_node *then_statement;
ast_node *else_statement;
};
class ast_switch_statement : public ast_node {
public:
ast_expression *expression;
struct simple_node statements;
};
class ast_iteration_statement : public ast_node {
public:
ast_iteration_statement(int mode, ast_node *init, ast_node *condition,
ast_expression *rest_expression, ast_node *body);
virtual void print(void) const;
enum ast_iteration_modes {
ast_for,
ast_while,
ast_do_while
} mode;
ast_node *init_statement;
ast_node *condition;
ast_expression *rest_expression;
ast_node *body;
};
class ast_jump_statement : public ast_node {
public:
ast_jump_statement(int mode, ast_expression *return_value);
virtual void print(void) const;
virtual ir_rvalue *hir(exec_list *instructions,
struct _mesa_glsl_parse_state *state);
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enum ast_jump_modes {
ast_continue,
ast_break,
ast_return,
ast_discard
} mode;
ast_expression *opt_return_value;
};
class ast_function_definition : public ast_node {
public:
virtual void print(void) const;
virtual ir_rvalue *hir(exec_list *instructions,
struct _mesa_glsl_parse_state *state);
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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 *
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_mesa_ast_field_selection_to_hir(const struct ast_expression *expr,
exec_list *instructions,
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struct _mesa_glsl_parse_state *state);
#endif /* AST_H */