| 0,0 → 1,1612 |
|---|
| /* -*- c++ -*- */ |
| /* |
| * 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. |
| */ |
| |
| #pragma once |
| #ifndef IR_H |
| #define IR_H |
| |
| #include <stdio.h> |
| #include <stdlib.h> |
| |
| #include "ralloc.h" |
| #include "glsl_types.h" |
| #include "list.h" |
| #include "ir_visitor.h" |
| #include "ir_hierarchical_visitor.h" |
| |
| /** |
| * \defgroup IR Intermediate representation nodes |
| * |
| * @{ |
| */ |
| |
| /** |
| * Class tags |
| * |
| * Each concrete class derived from \c ir_instruction has a value in this |
| * enumerant. The value for the type is stored in \c ir_instruction::ir_type |
| * by the constructor. While using type tags is not very C++, it is extremely |
| * convenient. For example, during debugging you can simply inspect |
| * \c ir_instruction::ir_type to find out the actual type of the object. |
| * |
| * In addition, it is possible to use a switch-statement based on \c |
| * \c ir_instruction::ir_type to select different behavior for different object |
| * types. For functions that have only slight differences for several object |
| * types, this allows writing very straightforward, readable code. |
| */ |
| enum ir_node_type { |
| /** |
| * Zero is unused so that the IR validator can detect cases where |
| * \c ir_instruction::ir_type has not been initialized. |
| */ |
| ir_type_unset, |
| ir_type_variable, |
| ir_type_assignment, |
| ir_type_call, |
| ir_type_constant, |
| ir_type_dereference_array, |
| ir_type_dereference_record, |
| ir_type_dereference_variable, |
| ir_type_discard, |
| ir_type_expression, |
| ir_type_function, |
| ir_type_function_signature, |
| ir_type_if, |
| ir_type_loop, |
| ir_type_loop_jump, |
| ir_type_return, |
| ir_type_swizzle, |
| ir_type_texture, |
| ir_type_max /**< maximum ir_type enum number, for validation */ |
| }; |
| |
| /** |
| * Base class of all IR instructions |
| */ |
| class ir_instruction : public exec_node { |
| public: |
| enum ir_node_type ir_type; |
| const struct glsl_type *type; |
| |
| /** ir_print_visitor helper for debugging. */ |
| void print(void) const; |
| |
| virtual void accept(ir_visitor *) = 0; |
| virtual ir_visitor_status accept(ir_hierarchical_visitor *) = 0; |
| virtual ir_instruction *clone(void *mem_ctx, |
| struct hash_table *ht) const = 0; |
| |
| /** |
| * \name IR instruction downcast functions |
| * |
| * These functions either cast the object to a derived class or return |
| * \c NULL if the object's type does not match the specified derived class. |
| * Additional downcast functions will be added as needed. |
| */ |
| /*@{*/ |
| virtual class ir_variable * as_variable() { return NULL; } |
| virtual class ir_function * as_function() { return NULL; } |
| virtual class ir_dereference * as_dereference() { return NULL; } |
| virtual class ir_dereference_array * as_dereference_array() { return NULL; } |
| virtual class ir_dereference_variable *as_dereference_variable() { return NULL; } |
| virtual class ir_expression * as_expression() { return NULL; } |
| virtual class ir_rvalue * as_rvalue() { return NULL; } |
| virtual class ir_loop * as_loop() { return NULL; } |
| virtual class ir_assignment * as_assignment() { return NULL; } |
| virtual class ir_call * as_call() { return NULL; } |
| virtual class ir_return * as_return() { return NULL; } |
| virtual class ir_if * as_if() { return NULL; } |
| virtual class ir_swizzle * as_swizzle() { return NULL; } |
| virtual class ir_constant * as_constant() { return NULL; } |
| virtual class ir_discard * as_discard() { return NULL; } |
| /*@}*/ |
| |
| protected: |
| ir_instruction() |
| { |
| ir_type = ir_type_unset; |
| type = NULL; |
| } |
| }; |
| |
| |
| class ir_rvalue : public ir_instruction { |
| public: |
| virtual ir_rvalue *clone(void *mem_ctx, struct hash_table *) const = 0; |
| |
| virtual ir_constant *constant_expression_value() = 0; |
| |
| virtual ir_rvalue * as_rvalue() |
| { |
| return this; |
| } |
| |
| ir_rvalue *as_rvalue_to_saturate(); |
| |
| virtual bool is_lvalue() |
| { |
| return false; |
| } |
| |
| /** |
| * Get the variable that is ultimately referenced by an r-value |
| */ |
| virtual ir_variable *variable_referenced() |
| { |
| return NULL; |
| } |
| |
| |
| /** |
| * If an r-value is a reference to a whole variable, get that variable |
| * |
| * \return |
| * Pointer to a variable that is completely dereferenced by the r-value. If |
| * the r-value is not a dereference or the dereference does not access the |
| * entire variable (i.e., it's just one array element, struct field), \c NULL |
| * is returned. |
| */ |
| virtual ir_variable *whole_variable_referenced() |
| { |
| return NULL; |
| } |
| |
| /** |
| * Determine if an r-value has the value zero |
| * |
| * The base implementation of this function always returns \c false. The |
| * \c ir_constant class over-rides this function to return \c true \b only |
| * for vector and scalar types that have all elements set to the value |
| * zero (or \c false for booleans). |
| * |
| * \sa ir_constant::has_value, ir_rvalue::is_one, ir_rvalue::is_negative_one |
| */ |
| virtual bool is_zero() const; |
| |
| /** |
| * Determine if an r-value has the value one |
| * |
| * The base implementation of this function always returns \c false. The |
| * \c ir_constant class over-rides this function to return \c true \b only |
| * for vector and scalar types that have all elements set to the value |
| * one (or \c true for booleans). |
| * |
| * \sa ir_constant::has_value, ir_rvalue::is_zero, ir_rvalue::is_negative_one |
| */ |
| virtual bool is_one() const; |
| |
| /** |
| * Determine if an r-value has the value negative one |
| * |
| * The base implementation of this function always returns \c false. The |
| * \c ir_constant class over-rides this function to return \c true \b only |
| * for vector and scalar types that have all elements set to the value |
| * negative one. For boolean times, the result is always \c false. |
| * |
| * \sa ir_constant::has_value, ir_rvalue::is_zero, ir_rvalue::is_one |
| */ |
| virtual bool is_negative_one() const; |
| |
| protected: |
| ir_rvalue(); |
| }; |
| |
| |
| /** |
| * Variable storage classes |
| */ |
| enum ir_variable_mode { |
| ir_var_auto = 0, /**< Function local variables and globals. */ |
| ir_var_uniform, /**< Variable declared as a uniform. */ |
| ir_var_in, |
| ir_var_out, |
| ir_var_inout, |
| ir_var_temporary /**< Temporary variable generated during compilation. */ |
| }; |
| |
| enum ir_variable_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 *, ir_variable_mode); |
| |
| virtual ir_variable *clone(void *mem_ctx, struct hash_table *ht) const; |
| |
| virtual ir_variable *as_variable() |
| { |
| return this; |
| } |
| |
| virtual void accept(ir_visitor *v) |
| { |
| v->visit(this); |
| } |
| |
| virtual ir_visitor_status accept(ir_hierarchical_visitor *); |
| |
| |
| /** |
| * Get the string value for the interpolation qualifier |
| * |
| * \return The string that would be used in a shader to specify \c |
| * mode will be returned. |
| * |
| * This function should only be used on a shader input or output variable. |
| */ |
| const char *interpolation_string() const; |
| |
| /** |
| * Calculate the number of slots required to hold this variable |
| * |
| * This is used to determine how many uniform or varying locations a variable |
| * occupies. The count is in units of floating point components. |
| */ |
| unsigned component_slots() const; |
| |
| /** |
| * Delcared name of the variable |
| */ |
| const char *name; |
| |
| /** |
| * Highest element accessed with a constant expression array index |
| * |
| * Not used for non-array variables. |
| */ |
| unsigned max_array_access; |
| |
| /** |
| * Is the variable read-only? |
| * |
| * This is set for variables declared as \c const, shader inputs, |
| * and uniforms. |
| */ |
| unsigned read_only:1; |
| unsigned centroid:1; |
| unsigned invariant:1; |
| |
| /** |
| * Has this variable been used for reading or writing? |
| * |
| * Several GLSL semantic checks require knowledge of whether or not a |
| * variable has been used. For example, it is an error to redeclare a |
| * variable as invariant after it has been used. |
| */ |
| unsigned used:1; |
| |
| /** |
| * Storage class of the variable. |
| * |
| * \sa ir_variable_mode |
| */ |
| unsigned mode:3; |
| |
| /** |
| * Interpolation mode for shader inputs / outputs |
| * |
| * \sa ir_variable_interpolation |
| */ |
| unsigned interpolation:2; |
| |
| /** |
| * Flag that the whole array is assignable |
| * |
| * In GLSL 1.20 and later whole arrays are assignable (and comparable for |
| * equality). This flag enables this behavior. |
| */ |
| unsigned array_lvalue:1; |
| |
| /** |
| * \name ARB_fragment_coord_conventions |
| * @{ |
| */ |
| unsigned origin_upper_left:1; |
| unsigned pixel_center_integer:1; |
| /*@}*/ |
| |
| /** |
| * Was the location explicitly set in the shader? |
| * |
| * If the location is explicitly set in the shader, it \b cannot be changed |
| * by the linker or by the API (e.g., calls to \c glBindAttribLocation have |
| * no effect). |
| */ |
| unsigned explicit_location:1; |
| |
| /** |
| * Storage location of the base of this variable |
| * |
| * The precise meaning of this field depends on the nature of the variable. |
| * |
| * - Vertex shader input: one of the values from \c gl_vert_attrib. |
| * - Vertex shader output: one of the values from \c gl_vert_result. |
| * - Fragment shader input: one of the values from \c gl_frag_attrib. |
| * - Fragment shader output: one of the values from \c gl_frag_result. |
| * - Uniforms: Per-stage uniform slot number. |
| * - Other: This field is not currently used. |
| * |
| * If the variable is a uniform, shader input, or shader output, and the |
| * slot has not been assigned, the value will be -1. |
| */ |
| int location; |
| |
| /** |
| * Emit a warning if this variable is accessed. |
| */ |
| const char *warn_extension; |
| |
| /** |
| * Value assigned in the initializer of a variable declared "const" |
| */ |
| ir_constant *constant_value; |
| }; |
| |
| |
| /*@{*/ |
| /** |
| * The representation of a function instance; may be the full definition or |
| * simply a prototype. |
| */ |
| class ir_function_signature : public ir_instruction { |
| /* An ir_function_signature will be part of the list of signatures in |
| * an ir_function. |
| */ |
| public: |
| ir_function_signature(const glsl_type *return_type); |
| |
| virtual ir_function_signature *clone(void *mem_ctx, |
| struct hash_table *ht) const; |
| ir_function_signature *clone_prototype(void *mem_ctx, |
| struct hash_table *ht) const; |
| |
| virtual void accept(ir_visitor *v) |
| { |
| v->visit(this); |
| } |
| |
| virtual ir_visitor_status accept(ir_hierarchical_visitor *); |
| |
| /** |
| * Get the name of the function for which this is a signature |
| */ |
| const char *function_name() const; |
| |
| /** |
| * Get a handle to the function for which this is a signature |
| * |
| * There is no setter function, this function returns a \c const pointer, |
| * and \c ir_function_signature::_function is private for a reason. The |
| * only way to make a connection between a function and function signature |
| * is via \c ir_function::add_signature. This helps ensure that certain |
| * invariants (i.e., a function signature is in the list of signatures for |
| * its \c _function) are met. |
| * |
| * \sa ir_function::add_signature |
| */ |
| inline const class ir_function *function() const |
| { |
| return this->_function; |
| } |
| |
| /** |
| * Check whether the qualifiers match between this signature's parameters |
| * and the supplied parameter list. If not, returns the name of the first |
| * parameter with mismatched qualifiers (for use in error messages). |
| */ |
| const char *qualifiers_match(exec_list *params); |
| |
| /** |
| * Replace the current parameter list with the given one. This is useful |
| * if the current information came from a prototype, and either has invalid |
| * or missing parameter names. |
| */ |
| void replace_parameters(exec_list *new_params); |
| |
| /** |
| * Function return type. |
| * |
| * \note This discards the optional precision qualifier. |
| */ |
| const struct glsl_type *return_type; |
| |
| /** |
| * List of ir_variable of function parameters. |
| * |
| * This represents the storage. The paramaters passed in a particular |
| * call will be in ir_call::actual_paramaters. |
| */ |
| struct exec_list parameters; |
| |
| /** Whether or not this function has a body (which may be empty). */ |
| unsigned is_defined:1; |
| |
| /** Whether or not this function signature is a built-in. */ |
| unsigned is_builtin:1; |
| |
| /** Body of instructions in the function. */ |
| struct exec_list body; |
| |
| private: |
| /** Function of which this signature is one overload. */ |
| class ir_function *_function; |
| |
| friend class ir_function; |
| }; |
| |
| |
| /** |
| * Header for tracking multiple overloaded functions with the same name. |
| * Contains a list of ir_function_signatures representing each of the |
| * actual functions. |
| */ |
| class ir_function : public ir_instruction { |
| public: |
| ir_function(const char *name); |
| |
| virtual ir_function *clone(void *mem_ctx, struct hash_table *ht) const; |
| |
| virtual ir_function *as_function() |
| { |
| return this; |
| } |
| |
| virtual void accept(ir_visitor *v) |
| { |
| v->visit(this); |
| } |
| |
| virtual ir_visitor_status accept(ir_hierarchical_visitor *); |
| |
| void add_signature(ir_function_signature *sig) |
| { |
| sig->_function = this; |
| this->signatures.push_tail(sig); |
| } |
| |
| /** |
| * Get an iterator for the set of function signatures |
| */ |
| exec_list_iterator iterator() |
| { |
| return signatures.iterator(); |
| } |
| |
| /** |
| * Find a signature that matches a set of actual parameters, taking implicit |
| * conversions into account. |
| */ |
| ir_function_signature *matching_signature(const exec_list *actual_param); |
| |
| /** |
| * Find a signature that exactly matches a set of actual parameters without |
| * any implicit type conversions. |
| */ |
| ir_function_signature *exact_matching_signature(const exec_list *actual_ps); |
| |
| /** |
| * Name of the function. |
| */ |
| const char *name; |
| |
| /** Whether or not this function has a signature that isn't a built-in. */ |
| bool has_user_signature(); |
| |
| /** |
| * List of ir_function_signature for each overloaded function with this name. |
| */ |
| struct exec_list signatures; |
| }; |
| |
| inline const char *ir_function_signature::function_name() const |
| { |
| return this->_function->name; |
| } |
| /*@}*/ |
| |
| |
| /** |
| * IR instruction representing high-level if-statements |
| */ |
| class ir_if : public ir_instruction { |
| public: |
| ir_if(ir_rvalue *condition) |
| : condition(condition) |
| { |
| ir_type = ir_type_if; |
| } |
| |
| virtual ir_if *clone(void *mem_ctx, struct hash_table *ht) const; |
| |
| virtual ir_if *as_if() |
| { |
| return this; |
| } |
| |
| virtual void accept(ir_visitor *v) |
| { |
| v->visit(this); |
| } |
| |
| virtual ir_visitor_status accept(ir_hierarchical_visitor *); |
| |
| ir_rvalue *condition; |
| /** List of ir_instruction for the body of the then branch */ |
| exec_list then_instructions; |
| /** List of ir_instruction for the body of the else branch */ |
| exec_list else_instructions; |
| }; |
| |
| |
| /** |
| * IR instruction representing a high-level loop structure. |
| */ |
| class ir_loop : public ir_instruction { |
| public: |
| ir_loop(); |
| |
| virtual ir_loop *clone(void *mem_ctx, struct hash_table *ht) const; |
| |
| virtual void accept(ir_visitor *v) |
| { |
| v->visit(this); |
| } |
| |
| virtual ir_visitor_status accept(ir_hierarchical_visitor *); |
| |
| virtual ir_loop *as_loop() |
| { |
| return this; |
| } |
| |
| /** |
| * Get an iterator for the instructions of the loop body |
| */ |
| exec_list_iterator iterator() |
| { |
| return body_instructions.iterator(); |
| } |
| |
| /** List of ir_instruction that make up the body of the loop. */ |
| exec_list body_instructions; |
| |
| /** |
| * \name Loop counter and controls |
| * |
| * Represents a loop like a FORTRAN \c do-loop. |
| * |
| * \note |
| * If \c from and \c to are the same value, the loop will execute once. |
| */ |
| /*@{*/ |
| ir_rvalue *from; /** Value of the loop counter on the first |
| * iteration of the loop. |
| */ |
| ir_rvalue *to; /** Value of the loop counter on the last |
| * iteration of the loop. |
| */ |
| ir_rvalue *increment; |
| ir_variable *counter; |
| |
| /** |
| * Comparison operation in the loop terminator. |
| * |
| * If any of the loop control fields are non-\c NULL, this field must be |
| * one of \c ir_binop_less, \c ir_binop_greater, \c ir_binop_lequal, |
| * \c ir_binop_gequal, \c ir_binop_equal, or \c ir_binop_nequal. |
| */ |
| int cmp; |
| /*@}*/ |
| }; |
| |
| |
| class ir_assignment : public ir_instruction { |
| public: |
| ir_assignment(ir_rvalue *lhs, ir_rvalue *rhs, ir_rvalue *condition); |
| |
| /** |
| * Construct an assignment with an explicit write mask |
| * |
| * \note |
| * Since a write mask is supplied, the LHS must already be a bare |
| * \c ir_dereference. The cannot be any swizzles in the LHS. |
| */ |
| ir_assignment(ir_dereference *lhs, ir_rvalue *rhs, ir_rvalue *condition, |
| unsigned write_mask); |
| |
| virtual ir_assignment *clone(void *mem_ctx, struct hash_table *ht) const; |
| |
| virtual ir_constant *constant_expression_value(); |
| |
| virtual void accept(ir_visitor *v) |
| { |
| v->visit(this); |
| } |
| |
| virtual ir_visitor_status accept(ir_hierarchical_visitor *); |
| |
| virtual ir_assignment * as_assignment() |
| { |
| return this; |
| } |
| |
| /** |
| * Get a whole variable written by an assignment |
| * |
| * If the LHS of the assignment writes a whole variable, the variable is |
| * returned. Otherwise \c NULL is returned. Examples of whole-variable |
| * assignment are: |
| * |
| * - Assigning to a scalar |
| * - Assigning to all components of a vector |
| * - Whole array (or matrix) assignment |
| * - Whole structure assignment |
| */ |
| ir_variable *whole_variable_written(); |
| |
| /** |
| * Set the LHS of an assignment |
| */ |
| void set_lhs(ir_rvalue *lhs); |
| |
| /** |
| * Left-hand side of the assignment. |
| * |
| * This should be treated as read only. If you need to set the LHS of an |
| * assignment, use \c ir_assignment::set_lhs. |
| */ |
| ir_dereference *lhs; |
| |
| /** |
| * Value being assigned |
| */ |
| ir_rvalue *rhs; |
| |
| /** |
| * Optional condition for the assignment. |
| */ |
| ir_rvalue *condition; |
| |
| |
| /** |
| * Component mask written |
| * |
| * For non-vector types in the LHS, this field will be zero. For vector |
| * types, a bit will be set for each component that is written. Note that |
| * for \c vec2 and \c vec3 types only the lower bits will ever be set. |
| * |
| * A partially-set write mask means that each enabled channel gets |
| * the value from a consecutive channel of the rhs. For example, |
| * to write just .xyw of gl_FrontColor with color: |
| * |
| * (assign (constant bool (1)) (xyw) |
| * (var_ref gl_FragColor) |
| * (swiz xyw (var_ref color))) |
| */ |
| unsigned write_mask:4; |
| }; |
| |
| /* Update ir_expression::num_operands() and operator_strs when |
| * updating this list. |
| */ |
| enum ir_expression_operation { |
| ir_unop_bit_not, |
| ir_unop_logic_not, |
| ir_unop_neg, |
| ir_unop_abs, |
| ir_unop_sign, |
| ir_unop_rcp, |
| ir_unop_rsq, |
| ir_unop_sqrt, |
| ir_unop_exp, /**< Log base e on gentype */ |
| ir_unop_log, /**< Natural log on gentype */ |
| ir_unop_exp2, |
| ir_unop_log2, |
| ir_unop_f2i, /**< Float-to-integer conversion. */ |
| ir_unop_i2f, /**< Integer-to-float conversion. */ |
| ir_unop_f2b, /**< Float-to-boolean conversion */ |
| ir_unop_b2f, /**< Boolean-to-float conversion */ |
| ir_unop_i2b, /**< int-to-boolean conversion */ |
| ir_unop_b2i, /**< Boolean-to-int conversion */ |
| ir_unop_u2f, /**< Unsigned-to-float conversion. */ |
| ir_unop_any, |
| |
| /** |
| * \name Unary floating-point rounding operations. |
| */ |
| /*@{*/ |
| ir_unop_trunc, |
| ir_unop_ceil, |
| ir_unop_floor, |
| ir_unop_fract, |
| ir_unop_round_even, |
| /*@}*/ |
| |
| /** |
| * \name Trigonometric operations. |
| */ |
| /*@{*/ |
| ir_unop_sin, |
| ir_unop_cos, |
| ir_unop_sin_reduced, /**< Reduced range sin. [-pi, pi] */ |
| ir_unop_cos_reduced, /**< Reduced range cos. [-pi, pi] */ |
| /*@}*/ |
| |
| /** |
| * \name Partial derivatives. |
| */ |
| /*@{*/ |
| ir_unop_dFdx, |
| ir_unop_dFdy, |
| /*@}*/ |
| |
| ir_unop_noise, |
| |
| /** |
| * A sentinel marking the last of the unary operations. |
| */ |
| ir_last_unop = ir_unop_noise, |
| |
| ir_binop_add, |
| ir_binop_sub, |
| ir_binop_mul, |
| ir_binop_div, |
| |
| /** |
| * Takes one of two combinations of arguments: |
| * |
| * - mod(vecN, vecN) |
| * - mod(vecN, float) |
| * |
| * Does not take integer types. |
| */ |
| ir_binop_mod, |
| |
| /** |
| * \name Binary comparison operators which return a boolean vector. |
| * The type of both operands must be equal. |
| */ |
| /*@{*/ |
| ir_binop_less, |
| ir_binop_greater, |
| ir_binop_lequal, |
| ir_binop_gequal, |
| ir_binop_equal, |
| ir_binop_nequal, |
| /** |
| * Returns single boolean for whether all components of operands[0] |
| * equal the components of operands[1]. |
| */ |
| ir_binop_all_equal, |
| /** |
| * Returns single boolean for whether any component of operands[0] |
| * is not equal to the corresponding component of operands[1]. |
| */ |
| ir_binop_any_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_dot, |
| ir_binop_min, |
| ir_binop_max, |
| |
| ir_binop_pow, |
| |
| /** |
| * A sentinel marking the last of the binary operations. |
| */ |
| ir_last_binop = ir_binop_pow, |
| |
| ir_quadop_vector, |
| |
| /** |
| * A sentinel marking the last of all operations. |
| */ |
| ir_last_opcode = ir_last_binop |
| }; |
| |
| class ir_expression : public ir_rvalue { |
| public: |
| /** |
| * Constructor for unary operation expressions |
| */ |
| ir_expression(int op, const struct glsl_type *type, ir_rvalue *); |
| ir_expression(int op, ir_rvalue *); |
| |
| /** |
| * Constructor for binary operation expressions |
| */ |
| ir_expression(int op, const struct glsl_type *type, |
| ir_rvalue *, ir_rvalue *); |
| ir_expression(int op, ir_rvalue *op0, ir_rvalue *op1); |
| |
| /** |
| * Constructor for quad operator expressions |
| */ |
| ir_expression(int op, const struct glsl_type *type, |
| ir_rvalue *, ir_rvalue *, ir_rvalue *, ir_rvalue *); |
| |
| virtual ir_expression *as_expression() |
| { |
| return this; |
| } |
| |
| virtual ir_expression *clone(void *mem_ctx, struct hash_table *ht) const; |
| |
| /** |
| * Attempt to constant-fold the expression |
| * |
| * If the expression cannot be constant folded, this method will return |
| * \c NULL. |
| */ |
| virtual ir_constant *constant_expression_value(); |
| |
| /** |
| * Determine the number of operands used by an expression |
| */ |
| static unsigned int get_num_operands(ir_expression_operation); |
| |
| /** |
| * Determine the number of operands used by an expression |
| */ |
| unsigned int get_num_operands() const |
| { |
| return (this->operation == ir_quadop_vector) |
| ? this->type->vector_elements : get_num_operands(operation); |
| } |
| |
| /** |
| * Return a string representing this expression's operator. |
| */ |
| const char *operator_string(); |
| |
| /** |
| * Return a string representing this expression's operator. |
| */ |
| static const char *operator_string(ir_expression_operation); |
| |
| |
| /** |
| * Do a reverse-lookup to translate the given string into an operator. |
| */ |
| static ir_expression_operation get_operator(const char *); |
| |
| virtual void accept(ir_visitor *v) |
| { |
| v->visit(this); |
| } |
| |
| virtual ir_visitor_status accept(ir_hierarchical_visitor *); |
| |
| ir_expression_operation operation; |
| ir_rvalue *operands[4]; |
| }; |
| |
| |
| /** |
| * IR instruction representing a function call |
| */ |
| class ir_call : public ir_rvalue { |
| public: |
| ir_call(ir_function_signature *callee, exec_list *actual_parameters) |
| : callee(callee) |
| { |
| ir_type = ir_type_call; |
| assert(callee->return_type != NULL); |
| type = callee->return_type; |
| actual_parameters->move_nodes_to(& this->actual_parameters); |
| } |
| |
| virtual ir_call *clone(void *mem_ctx, struct hash_table *ht) const; |
| |
| virtual ir_constant *constant_expression_value(); |
| |
| virtual ir_call *as_call() |
| { |
| return this; |
| } |
| |
| virtual void accept(ir_visitor *v) |
| { |
| v->visit(this); |
| } |
| |
| virtual ir_visitor_status accept(ir_hierarchical_visitor *); |
| |
| /** |
| * Get a generic ir_call object when an error occurs |
| * |
| * Any allocation will be performed with 'ctx' as ralloc owner. |
| */ |
| static ir_call *get_error_instruction(void *ctx); |
| |
| /** |
| * Get an iterator for the set of acutal parameters |
| */ |
| exec_list_iterator iterator() |
| { |
| return actual_parameters.iterator(); |
| } |
| |
| /** |
| * Get the name of the function being called. |
| */ |
| const char *callee_name() const |
| { |
| return callee->function_name(); |
| } |
| |
| /** |
| * Get the function signature bound to this function call |
| */ |
| ir_function_signature *get_callee() |
| { |
| return callee; |
| } |
| |
| /** |
| * Set the function call target |
| */ |
| void set_callee(ir_function_signature *sig); |
| |
| /** |
| * Generates an inline version of the function before @ir, |
| * returning the return value of the function. |
| */ |
| ir_rvalue *generate_inline(ir_instruction *ir); |
| |
| /* List of ir_rvalue of paramaters passed in this call. */ |
| exec_list actual_parameters; |
| |
| private: |
| ir_call() |
| : callee(NULL) |
| { |
| this->ir_type = ir_type_call; |
| } |
| |
| ir_function_signature *callee; |
| }; |
| |
| |
| /** |
| * \name Jump-like IR instructions. |
| * |
| * These include \c break, \c continue, \c return, and \c discard. |
| */ |
| /*@{*/ |
| class ir_jump : public ir_instruction { |
| protected: |
| ir_jump() |
| { |
| ir_type = ir_type_unset; |
| } |
| }; |
| |
| class ir_return : public ir_jump { |
| public: |
| ir_return() |
| : value(NULL) |
| { |
| this->ir_type = ir_type_return; |
| } |
| |
| ir_return(ir_rvalue *value) |
| : value(value) |
| { |
| this->ir_type = ir_type_return; |
| } |
| |
| virtual ir_return *clone(void *mem_ctx, struct hash_table *) const; |
| |
| virtual ir_return *as_return() |
| { |
| return this; |
| } |
| |
| ir_rvalue *get_value() const |
| { |
| return value; |
| } |
| |
| virtual void accept(ir_visitor *v) |
| { |
| v->visit(this); |
| } |
| |
| virtual ir_visitor_status accept(ir_hierarchical_visitor *); |
| |
| ir_rvalue *value; |
| }; |
| |
| |
| /** |
| * Jump instructions used inside loops |
| * |
| * These include \c break and \c continue. The \c break within a loop is |
| * different from the \c break within a switch-statement. |
| * |
| * \sa ir_switch_jump |
| */ |
| class ir_loop_jump : public ir_jump { |
| public: |
| enum jump_mode { |
| jump_break, |
| jump_continue |
| }; |
| |
| ir_loop_jump(jump_mode mode) |
| { |
| this->ir_type = ir_type_loop_jump; |
| this->mode = mode; |
| this->loop = loop; |
| } |
| |
| virtual ir_loop_jump *clone(void *mem_ctx, struct hash_table *) const; |
| |
| virtual void accept(ir_visitor *v) |
| { |
| v->visit(this); |
| } |
| |
| virtual ir_visitor_status accept(ir_hierarchical_visitor *); |
| |
| bool is_break() const |
| { |
| return mode == jump_break; |
| } |
| |
| bool is_continue() const |
| { |
| return mode == jump_continue; |
| } |
| |
| /** Mode selector for the jump instruction. */ |
| enum jump_mode mode; |
| private: |
| /** Loop containing this break instruction. */ |
| ir_loop *loop; |
| }; |
| |
| /** |
| * IR instruction representing discard statements. |
| */ |
| class ir_discard : public ir_jump { |
| public: |
| ir_discard() |
| { |
| this->ir_type = ir_type_discard; |
| this->condition = NULL; |
| } |
| |
| ir_discard(ir_rvalue *cond) |
| { |
| this->ir_type = ir_type_discard; |
| this->condition = cond; |
| } |
| |
| virtual ir_discard *clone(void *mem_ctx, struct hash_table *ht) const; |
| |
| virtual void accept(ir_visitor *v) |
| { |
| v->visit(this); |
| } |
| |
| virtual ir_visitor_status accept(ir_hierarchical_visitor *); |
| |
| virtual ir_discard *as_discard() |
| { |
| return this; |
| } |
| |
| ir_rvalue *condition; |
| }; |
| /*@}*/ |
| |
| |
| /** |
| * Texture sampling opcodes used in ir_texture |
| */ |
| enum ir_texture_opcode { |
| ir_tex, /**< Regular texture look-up */ |
| ir_txb, /**< Texture look-up with LOD bias */ |
| ir_txl, /**< Texture look-up with explicit LOD */ |
| ir_txd, /**< Texture look-up with partial derivatvies */ |
| ir_txf /**< Texel fetch with explicit LOD */ |
| }; |
| |
| |
| /** |
| * IR instruction to sample a texture |
| * |
| * The specific form of the IR instruction depends on the \c mode value |
| * selected from \c ir_texture_opcodes. In the printed IR, these will |
| * appear as: |
| * |
| * Texel offset |
| * | Projection divisor |
| * | | Shadow comparitor |
| * | | | |
| * v v v |
| * (tex (sampler) (coordinate) (0 0 0) (1) ( )) |
| * (txb (sampler) (coordinate) (0 0 0) (1) ( ) (bias)) |
| * (txl (sampler) (coordinate) (0 0 0) (1) ( ) (lod)) |
| * (txd (sampler) (coordinate) (0 0 0) (1) ( ) (dPdx dPdy)) |
| * (txf (sampler) (coordinate) (0 0 0) (lod)) |
| */ |
| class ir_texture : public ir_rvalue { |
| public: |
| ir_texture(enum ir_texture_opcode op) |
| : op(op), projector(NULL), shadow_comparitor(NULL) |
| { |
| this->ir_type = ir_type_texture; |
| } |
| |
| virtual ir_texture *clone(void *mem_ctx, struct hash_table *) const; |
| |
| virtual ir_constant *constant_expression_value(); |
| |
| virtual void accept(ir_visitor *v) |
| { |
| v->visit(this); |
| } |
| |
| virtual ir_visitor_status accept(ir_hierarchical_visitor *); |
| |
| /** |
| * Return a string representing the ir_texture_opcode. |
| */ |
| const char *opcode_string(); |
| |
| /** Set the sampler and infer the type. */ |
| void set_sampler(ir_dereference *sampler); |
| |
| /** |
| * Do a reverse-lookup to translate a string into an ir_texture_opcode. |
| */ |
| static ir_texture_opcode get_opcode(const char *); |
| |
| enum ir_texture_opcode op; |
| |
| /** Sampler to use for the texture access. */ |
| ir_dereference *sampler; |
| |
| /** Texture coordinate to sample */ |
| ir_rvalue *coordinate; |
| |
| /** |
| * Value used for projective divide. |
| * |
| * If there is no projective divide (the common case), this will be |
| * \c NULL. Optimization passes should check for this to point to a constant |
| * of 1.0 and replace that with \c NULL. |
| */ |
| ir_rvalue *projector; |
| |
| /** |
| * Coordinate used for comparison on shadow look-ups. |
| * |
| * If there is no shadow comparison, this will be \c NULL. For the |
| * \c ir_txf opcode, this *must* be \c NULL. |
| */ |
| ir_rvalue *shadow_comparitor; |
| |
| /** Explicit texel offsets. */ |
| signed char offsets[3]; |
| |
| union { |
| ir_rvalue *lod; /**< Floating point LOD */ |
| ir_rvalue *bias; /**< Floating point LOD bias */ |
| struct { |
| ir_rvalue *dPdx; /**< Partial derivative of coordinate wrt X */ |
| ir_rvalue *dPdy; /**< Partial derivative of coordinate wrt Y */ |
| } grad; |
| } lod_info; |
| }; |
| |
| |
| 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:3; |
| |
| /** |
| * Does the swizzle contain duplicate components? |
| * |
| * L-value swizzles cannot contain duplicate components. |
| */ |
| unsigned has_duplicates:1; |
| }; |
| |
| |
| class ir_swizzle : public ir_rvalue { |
| public: |
| ir_swizzle(ir_rvalue *, unsigned x, unsigned y, unsigned z, unsigned w, |
| unsigned count); |
| |
| ir_swizzle(ir_rvalue *val, const unsigned *components, unsigned count); |
| |
| ir_swizzle(ir_rvalue *val, ir_swizzle_mask mask); |
| |
| virtual ir_swizzle *clone(void *mem_ctx, struct hash_table *) const; |
| |
| virtual ir_constant *constant_expression_value(); |
| |
| virtual ir_swizzle *as_swizzle() |
| { |
| return this; |
| } |
| |
| /** |
| * Construct an ir_swizzle from the textual representation. Can fail. |
| */ |
| static ir_swizzle *create(ir_rvalue *, const char *, unsigned vector_length); |
| |
| virtual void accept(ir_visitor *v) |
| { |
| v->visit(this); |
| } |
| |
| virtual ir_visitor_status accept(ir_hierarchical_visitor *); |
| |
| bool is_lvalue() |
| { |
| return val->is_lvalue() && !mask.has_duplicates; |
| } |
| |
| /** |
| * Get the variable that is ultimately referenced by an r-value |
| */ |
| virtual ir_variable *variable_referenced(); |
| |
| ir_rvalue *val; |
| ir_swizzle_mask mask; |
| |
| private: |
| /** |
| * Initialize the mask component of a swizzle |
| * |
| * This is used by the \c ir_swizzle constructors. |
| */ |
| void init_mask(const unsigned *components, unsigned count); |
| }; |
| |
| |
| class ir_dereference : public ir_rvalue { |
| public: |
| virtual ir_dereference *clone(void *mem_ctx, struct hash_table *) const = 0; |
| |
| virtual ir_dereference *as_dereference() |
| { |
| return this; |
| } |
| |
| bool is_lvalue(); |
| |
| /** |
| * Get the variable that is ultimately referenced by an r-value |
| */ |
| virtual ir_variable *variable_referenced() = 0; |
| }; |
| |
| |
| class ir_dereference_variable : public ir_dereference { |
| public: |
| ir_dereference_variable(ir_variable *var); |
| |
| virtual ir_dereference_variable *clone(void *mem_ctx, |
| struct hash_table *) const; |
| |
| virtual ir_constant *constant_expression_value(); |
| |
| virtual ir_dereference_variable *as_dereference_variable() |
| { |
| return this; |
| } |
| |
| /** |
| * Get the variable that is ultimately referenced by an r-value |
| */ |
| virtual ir_variable *variable_referenced() |
| { |
| return this->var; |
| } |
| |
| virtual ir_variable *whole_variable_referenced() |
| { |
| /* ir_dereference_variable objects always dereference the entire |
| * variable. However, if this dereference is dereferenced by anything |
| * else, the complete deferefernce chain is not a whole-variable |
| * dereference. This method should only be called on the top most |
| * ir_rvalue in a dereference chain. |
| */ |
| return this->var; |
| } |
| |
| virtual void accept(ir_visitor *v) |
| { |
| v->visit(this); |
| } |
| |
| virtual ir_visitor_status accept(ir_hierarchical_visitor *); |
| |
| /** |
| * Object being dereferenced. |
| */ |
| ir_variable *var; |
| }; |
| |
| |
| class ir_dereference_array : public ir_dereference { |
| public: |
| ir_dereference_array(ir_rvalue *value, ir_rvalue *array_index); |
| |
| ir_dereference_array(ir_variable *var, ir_rvalue *array_index); |
| |
| virtual ir_dereference_array *clone(void *mem_ctx, |
| struct hash_table *) const; |
| |
| virtual ir_constant *constant_expression_value(); |
| |
| virtual ir_dereference_array *as_dereference_array() |
| { |
| return this; |
| } |
| |
| /** |
| * Get the variable that is ultimately referenced by an r-value |
| */ |
| virtual ir_variable *variable_referenced() |
| { |
| return this->array->variable_referenced(); |
| } |
| |
| virtual void accept(ir_visitor *v) |
| { |
| v->visit(this); |
| } |
| |
| virtual ir_visitor_status accept(ir_hierarchical_visitor *); |
| |
| ir_rvalue *array; |
| ir_rvalue *array_index; |
| |
| private: |
| void set_array(ir_rvalue *value); |
| }; |
| |
| |
| class ir_dereference_record : public ir_dereference { |
| public: |
| ir_dereference_record(ir_rvalue *value, const char *field); |
| |
| ir_dereference_record(ir_variable *var, const char *field); |
| |
| virtual ir_dereference_record *clone(void *mem_ctx, |
| struct hash_table *) const; |
| |
| virtual ir_constant *constant_expression_value(); |
| |
| /** |
| * Get the variable that is ultimately referenced by an r-value |
| */ |
| virtual ir_variable *variable_referenced() |
| { |
| return this->record->variable_referenced(); |
| } |
| |
| virtual void accept(ir_visitor *v) |
| { |
| v->visit(this); |
| } |
| |
| virtual ir_visitor_status accept(ir_hierarchical_visitor *); |
| |
| ir_rvalue *record; |
| const char *field; |
| }; |
| |
| |
| /** |
| * Data stored in an ir_constant |
| */ |
| union ir_constant_data { |
| unsigned u[16]; |
| int i[16]; |
| float f[16]; |
| bool b[16]; |
| }; |
| |
| |
| class ir_constant : public ir_rvalue { |
| public: |
| ir_constant(const struct glsl_type *type, const ir_constant_data *data); |
| ir_constant(bool b); |
| ir_constant(unsigned int u); |
| ir_constant(int i); |
| ir_constant(float f); |
| |
| /** |
| * Construct an ir_constant from a list of ir_constant values |
| */ |
| ir_constant(const struct glsl_type *type, exec_list *values); |
| |
| /** |
| * Construct an ir_constant from a scalar component of another ir_constant |
| * |
| * The new \c ir_constant inherits the type of the component from the |
| * source constant. |
| * |
| * \note |
| * In the case of a matrix constant, the new constant is a scalar, \b not |
| * a vector. |
| */ |
| ir_constant(const ir_constant *c, unsigned i); |
| |
| /** |
| * Return a new ir_constant of the specified type containing all zeros. |
| */ |
| static ir_constant *zero(void *mem_ctx, const glsl_type *type); |
| |
| virtual ir_constant *clone(void *mem_ctx, struct hash_table *) const; |
| |
| virtual ir_constant *constant_expression_value(); |
| |
| virtual ir_constant *as_constant() |
| { |
| return this; |
| } |
| |
| virtual void accept(ir_visitor *v) |
| { |
| v->visit(this); |
| } |
| |
| virtual ir_visitor_status accept(ir_hierarchical_visitor *); |
| |
| /** |
| * Get a particular component of a constant as a specific type |
| * |
| * This is useful, for example, to get a value from an integer constant |
| * as a float or bool. This appears frequently when constructors are |
| * called with all constant parameters. |
| */ |
| /*@{*/ |
| bool get_bool_component(unsigned i) const; |
| float get_float_component(unsigned i) const; |
| int get_int_component(unsigned i) const; |
| unsigned get_uint_component(unsigned i) const; |
| /*@}*/ |
| |
| ir_constant *get_array_element(unsigned i) const; |
| |
| ir_constant *get_record_field(const char *name); |
| |
| /** |
| * Determine whether a constant has the same value as another constant |
| * |
| * \sa ir_constant::is_zero, ir_constant::is_one, |
| * ir_constant::is_negative_one |
| */ |
| bool has_value(const ir_constant *) const; |
| |
| virtual bool is_zero() const; |
| virtual bool is_one() const; |
| virtual bool is_negative_one() const; |
| |
| /** |
| * 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 ir_constant_data value; |
| |
| /* Array elements */ |
| ir_constant **array_elements; |
| |
| /* Structure fields */ |
| exec_list components; |
| |
| private: |
| /** |
| * Parameterless constructor only used by the clone method |
| */ |
| ir_constant(void); |
| }; |
| |
| /*@}*/ |
| |
| /** |
| * Apply a visitor to each IR node in a list |
| */ |
| void |
| visit_exec_list(exec_list *list, ir_visitor *visitor); |
| |
| /** |
| * Validate invariants on each IR node in a list |
| */ |
| void validate_ir_tree(exec_list *instructions); |
| |
| /** |
| * Make a clone of each IR instruction in a list |
| * |
| * \param in List of IR instructions that are to be cloned |
| * \param out List to hold the cloned instructions |
| */ |
| void |
| clone_ir_list(void *mem_ctx, exec_list *out, const exec_list *in); |
| |
| extern void |
| _mesa_glsl_initialize_variables(exec_list *instructions, |
| struct _mesa_glsl_parse_state *state); |
| |
| extern void |
| _mesa_glsl_initialize_functions(exec_list *instructions, |
| struct _mesa_glsl_parse_state *state); |
| |
| extern void |
| _mesa_glsl_release_functions(void); |
| |
| extern void |
| reparent_ir(exec_list *list, void *mem_ctx); |
| |
| struct glsl_symbol_table; |
| |
| extern void |
| import_prototypes(const exec_list *source, exec_list *dest, |
| struct glsl_symbol_table *symbols, void *mem_ctx); |
| |
| extern bool |
| ir_has_call(ir_instruction *ir); |
| |
| extern void |
| do_set_program_inouts(exec_list *instructions, struct gl_program *prog); |
| |
| #endif /* IR_H */ |