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/*
* Copyright © 2010 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.
*/
#include "list.h"
#include "ir_visitor.h"
struct ir_program {
void *bong_hits;
};
enum ir_opcodes {
ir_op_var_decl,
ir_op_assign,
ir_op_expression,
ir_op_dereference,
ir_op_jump,
ir_op_label,
ir_op_constant,
ir_op_func_sig,
ir_op_func
};
/**
* Base class of all IR instructions
*/
class ir_instruction : public exec_node {
public:
unsigned mode;
const struct glsl_type *type;
virtual void accept(ir_visitor *) = 0;
protected:
ir_instruction(int mode);
private:
/**
* Dummy constructor to catch bad constructors in derived classes.
*
* Every derived must use the constructor that sets the instructions
* mode. Having the \c void constructor private prevents derived classes
* from accidentally doing the wrong thing.
*/
ir_instruction(void);
};
enum ir_variable_mode {
ir_var_auto = 0,
ir_var_uniform,
ir_var_in,
ir_var_out,
ir_var_inout
};
enum ir_varaible_interpolation {
ir_var_smooth = 0,
ir_var_flat,
ir_var_noperspective
};
class ir_variable : public ir_instruction {
public:
ir_variable(const struct glsl_type *, const char *);
virtual void accept(ir_visitor *v)
{
v->visit(this);
}
const char *name;
unsigned read_only:1;
unsigned centroid:1;
unsigned invariant:1;
unsigned mode:3;
unsigned interpolation:2;
};
class ir_label : public ir_instruction {
public:
ir_label(const char *label);
virtual void accept(ir_visitor *v)
{
v->visit(this);
}
const char *label;
};
/*@{*/
class ir_function_signature : public ir_instruction {
public:
ir_function_signature(void);
virtual void accept(ir_visitor *v)
{
v->visit(this);
}
/**
* Function return type.
*
* \note This discards the optional precision qualifier.
*/
const struct glsl_type *return_type;
/**
* List of function parameters stored as ir_variable objects.
*/
struct exec_list parameters;
/**
* Pointer to the label that begins the function definition.
*/
ir_label *definition;
};
/**
* Header for tracking functions in the symbol table
*/
class ir_function : public ir_instruction {
public:
ir_function(void);
virtual void accept(ir_visitor *v)
{
v->visit(this);
}
/**
* Name of the function.
*/
const char *name;
struct exec_list signatures;
};
/*@}*/
class ir_expression;
class ir_dereference;
class ir_assignment : public ir_instruction {
public:
ir_assignment(ir_instruction *lhs, ir_instruction *rhs,
ir_expression *condition);
virtual void accept(ir_visitor *v)
{
v->visit(this);
}
/**
* Left-hand side of the assignment.
*/
ir_dereference *lhs;
/**
* Value being assigned
*
* This should be either \c ir_op_expression or \c ir_op_deference.
*/
ir_instruction *rhs;
/**
* Optional condition for the assignment.
*/
ir_expression *condition;
};
enum ir_expression_operation {
ir_unop_bit_not,
ir_unop_logic_not,
ir_unop_neg,
ir_unop_abs,
ir_unop_rcp,
ir_unop_rsq,
ir_unop_exp,
ir_unop_log,
ir_unop_f2i, /**< Float-to-integer conversion. */
ir_unop_i2f, /**< Integer-to-float conversion. */
/**
* \name Unary floating-point rounding operations.
*/
/*@{*/
ir_unop_trunc,
ir_unop_ceil,
ir_unop_floor,
/*@}*/
ir_binop_add,
ir_binop_sub,
ir_binop_mul,
ir_binop_div,
ir_binop_mod,
/**
* \name Binary comparison operators
*/
/*@{*/
ir_binop_less,
ir_binop_greater,
ir_binop_lequal,
ir_binop_gequal,
ir_binop_equal,
ir_binop_nequal,
/*@}*/
/**
* \name Bit-wise binary operations.
*/
/*@{*/
ir_binop_lshift,
ir_binop_rshift,
ir_binop_bit_and,
ir_binop_bit_xor,
ir_binop_bit_or,
/*@}*/
ir_binop_logic_and,
ir_binop_logic_xor,
ir_binop_logic_or,
ir_binop_logic_not,
ir_binop_dot,
ir_binop_min,
ir_binop_max,
ir_binop_pow
};
class ir_expression : public ir_instruction {
public:
ir_expression(int op, const struct glsl_type *type,
ir_instruction *, ir_instruction *);
virtual void accept(ir_visitor *v)
{
v->visit(this);
}
ir_expression_operation operation;
ir_instruction *operands[2];
};
struct ir_swizzle_mask {
unsigned x:2;
unsigned y:2;
unsigned z:2;
unsigned w:2;
/**
* Number of components in the swizzle.
*/
unsigned num_components:2;
/**
* Does the swizzle contain duplicate components?
*
* L-value swizzles cannot contain duplicate components.
*/
unsigned has_duplicates:1;
};
class ir_dereference : public ir_instruction {
public:
ir_dereference(struct ir_instruction *);
virtual void accept(ir_visitor *v)
{
v->visit(this);
}
enum {
ir_reference_variable,
ir_reference_array,
ir_reference_record
} mode;
/**
* Object being dereferenced.
*
* Must be either an \c ir_variable or an \c ir_deference.
*/
ir_instruction *var;
union {
ir_expression *array_index;
const char *field;
struct ir_swizzle_mask swizzle;
} selector;
};
class ir_constant : public ir_instruction {
public:
ir_constant(const struct glsl_type *type, const void *data);
virtual void accept(ir_visitor *v)
{
v->visit(this);
}
/**
* Value of the constant.
*
* The field used to back the values supplied by the constant is determined
* by the type associated with the \c ir_instruction. Constants may be
* scalars, vectors, or matrices.
*/
union {
unsigned u[16];
int i[16];
float f[16];
bool b[16];
} value;
};
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