X-Git-Url: http://nsz.repo.hu/git/?a=blobdiff_plain;f=ir%2Fbe%2Fbearch.h;h=62185f241fd11894709ad9c6099cbfaf81a0351a;hb=77f1eeaeb90f2d231b0ccc2fcbe071a9b457e6c3;hp=857a17d18e87f83aa9203dc313704089b34ec5d8;hpb=c0b91541ff00fc193b51a3ac3c3f89d7e312d8e7;p=libfirm diff --git a/ir/be/bearch.h b/ir/be/bearch.h index 857a17d18..62185f241 100644 --- a/ir/be/bearch.h +++ b/ir/be/bearch.h @@ -4,9 +4,8 @@ #include "firm_config.h" -#include "irop_t.h" -#include "irnode_t.h" -#include "irmode_t.h" +#include "irnode.h" +#include "irmode.h" #include "hashptr.h" #include "fourcc.h" @@ -14,14 +13,17 @@ #include "list.h" #include "ident.h" -#include "bearch.h" - -#define ARCH_OBJ(name,x) typedef struct _arch_ ## name ## _t arch_ ## name ## _t; -#include "bearch_obj.def" -#undef ARCH_OBJ - struct _bitset_t; +typedef struct _arch_register_class_t arch_register_class_t; +typedef struct _arch_register_t arch_register_t; +typedef struct _arch_enum_t arch_enum_t; +typedef struct _arch_enum_member_t arch_enum_member_t; +typedef struct _arch_isa_if_t arch_isa_if_t; +typedef struct _arch_env_t arch_env_t; +typedef struct _arch_irn_ops_t arch_irn_ops_t; +typedef struct _arch_irn_handler_t arch_irn_handler_t; + typedef enum _arch_register_type_t { arch_register_type_none = 0, arch_register_type_write_invariant, @@ -41,6 +43,7 @@ struct _arch_register_t { const arch_register_class_t *reg_class; /**< The class the register belongs to. */ int index; /**< The index of the register in the class. */ arch_register_type_t type; /**< The type of the register. */ + void *data; /**< Custom data. */ }; static INLINE const arch_register_class_t * @@ -56,41 +59,29 @@ static INLINE int _arch_register_get_index(const arch_register_t *reg) #define arch_register_get_class(reg) _arch_register_get_class(reg) #define arch_register_get_index(reg) _arch_register_get_index(reg) - -/** - * A (sub-) set of registers. - */ -struct _arch_register_set_t { - const struct _arch_register_class_t *reg_class; /**< The register class for this set. */ - int *regs; /**< An array containing 0/1 at place i - whether the register with index i is - in the set or not. */ -}; - -static INLINE int _arch_register_in_set(const arch_register_set_t *set, - const arch_register_t *reg) -{ - if(reg->reg_class != set->reg_class) - return 0; - - return set->regs[reg->index]; -} - +#define arch_register_get_name(reg) ((reg)->name) /** * A class of registers. * Like general purpose or floating point. */ struct _arch_register_class_t { - const char *name; /**< The name of the register. */ - arch_register_set_t *set; /**< A register set containing all registers - in this class. */ - int n_regs; /**< Number of registers in this class. */ - const arch_register_t *regs; /**< The array of registers. */ + const char *name; /**< The name of the register. */ + int n_regs; /**< Number of registers in this class. */ + const arch_register_t *regs; /**< The array of registers. */ }; #define arch_register_class_n_regs(cls) ((cls)->n_regs) +/** + * Put all registers in a class into a bitset. + * @param cls The class. + * @param bs The bitset. May be NULL. + * @return The number of registers in the class. + */ +extern int arch_register_class_put(const arch_register_class_t *cls, + struct _bitset_t *bs); + static INLINE const arch_register_t * _arch_register_for_index(const arch_register_class_t *cls, int idx) { @@ -136,61 +127,286 @@ struct _arch_enum_t { }; typedef enum _arch_operand_type_t { -#define ARCH_OPERAND_TYPE(name,size_in_irn) arch_operand_type_ ## name, -#include "bearch_operand_types.def" -#undef ARCH_OPERAND_TYPE + arch_operand_type_invalid, + arch_operand_type_memory, + arch_operand_type_register, + arch_operand_type_immediate, + arch_operand_type_symconst, arch_operand_type_last } arch_operand_type_t; +/** + * Different types of register allocation requirements. + */ +typedef enum _arch_register_req_type_t { + arch_register_req_type_none = 0, /** No register requirement. */ + + arch_register_req_type_normal = 1, /** All registers in the class + are allowed. */ + + arch_register_req_type_limited = 2, /** Only a real subset of + the class is allowed. */ + + arch_register_req_type_equal = 4, /** The register must equal + another one at the node. */ + + arch_register_req_type_unequal = 8, /** The register must be unequal + to some other at the node. */ + arch_register_req_type_pair = 16 /** The register is part of a + register pair. */ +} arch_register_req_type_t; + +#define arch_register_req_is_constr(x) \ + ((x)->type & (arch_register_req_type_pair + arch_register_req_type_limited - 1) != 0) /** - * The data for the different flavours of operand types. + * Expresses requirements to register allocation for an operand. */ -typedef union _arch_operand_data_t { - const arch_register_set_t *set; /**< The set of valid registers is directly - given. Note, that if an insn has no constraints, - the set comprises all registers in the - register class. */ +typedef struct _arch_register_req_t { + arch_register_req_type_t type; /** The type of the constraint. */ + const arch_register_class_t *cls; /** The register class this + constraint belongs to. */ + union { + int (*limited)(const ir_node *irn, int pos, struct _bitset_t *bs); + /** In case of the 'limited' + constraint, this function + must put all allowable + registers in the bitset and + return the number of registers + in the bitset. */ + + int pos; /** In case of the equal constraint, + this gives the position of the + operand to which the register of + this should be equal to. Same for + unequal. */ + } data; +} arch_register_req_t; - const arch_immediate_t *imm; /**< If the operand is an immediate - operand, this describes the kind of - immediate. */ +/** + * Certain node classes which are relevent for the register allocator. + */ +typedef enum _arch_irn_class_t { + arch_irn_class_normal, + arch_irn_class_spill, + arch_irn_class_reload, + arch_irn_class_copy, + arch_irn_class_perm +} arch_irn_class_t; + +/* + * Some words about positions and indices: + * + * Firm has the policy "One node per value", that's why there are + * Proj nodes. This view has its advantages, but in a backend + * setting where we talk about instructions (which can also have + * multiple results and not a single Tuple value) this is sometimes + * hard. + * + * Each node representing an instruction must provide information + * about the kind of its operands (where operands mean both input + * and output operands). Such an operand is addressed with a position + * which is infact a tuple {in, out} x N. The fact that a position + * is an input/output operand is encoded in the sign, so input operands + * go from 0..n-1 and output operands from -1..-m if the + * instruction has n input and m output operands. + */ - const arch_enum_t *enm; /**< Some enumeration value. */ +#define _BEARCH_TRANSFORM_INDEX(cmp, index) ((index) cmp 0 ? -((index) + 1) : (index)) - int same_as_pos; /**< 'Same as' position for equals. */ -} arch_operand_data_t; +/** + * Make an in position from an index. + * @param index The index. + * @return The position representing the index as an in operand. + */ +#define arch_pos_make_in(index) _BEARCH_TRANSFORM_INDEX(<, index) /** - * An operand to an instruction. + * Make an out position from an index. + * @param index The index. + * @return The position representing the index as an out operand. */ -struct _arch_operand_t { - arch_operand_type_t type; /**< The type of the operand. */ - arch_operand_data_t data; /**< The payload. */ -}; +#define arch_pos_make_out(index) _BEARCH_TRANSFORM_INDEX(>=, index) /** - * An instruction format. + * Check, if a position denotes an input operand. + * @param pos The position. + * @return 1, if the position denotes an input operand 0 if not. */ -struct _arch_insn_format_t { - int n_in; /**< Number of in operands. */ - int n_out; /**< Number of out operands. */ +#define arch_pos_is_in(pos) ((pos) >= 0) - arch_operand_t * const *in_operands; /**< In operands. */ - arch_operand_t * const *out_operands; /**< Out operands. */ -}; +/** + * Check, if a position denotes an output operand. + * @param pos The position. + * @return 1, if the position denotes an output operand 0 if not. + */ +#define arch_pos_is_out(pos) (!arch_pos_is_in(pos)) /** - * An instruction. + * Get the index of a position. + * @param pos The position. + * @return The index of the position. */ -struct _arch_insn_t { - const arch_insn_format_t *format; /**< The format of the instruction. */ - ir_op *op; /**< The firm opcode for this insn. */ +#define arch_pos_get_index(pos) _BEARCH_TRANSFORM_INDEX(<, pos) + +struct _arch_irn_ops_t { + + /** + * Get the register requirements for a given operand. + * @param self The self pointer. + * @param irn The node. + * @param pos The operand's position. + * @return The register requirements for the selected operand. + * The pointer returned is never NULL. + */ + const arch_register_req_t *(*get_irn_reg_req)(const arch_irn_ops_t *self, + arch_register_req_t *req, + const ir_node *irn, int pos); + + /** + * Get the number of operands of a node. + * @param irn The node. + * @param in_out Denotes wither input (a number >= 0) or + * output (a number < 0). + * @return The number of operands for either in, or output. + */ + int (*get_n_operands)(const arch_irn_ops_t *self, const ir_node *irn, int in_out); + + /** + * Set the register for an output operand. + * @param irn The node. + * @param pos The position of the output operand. + * @param reg The register allocated to that operand. + * @note If the operand is not a register operand, + * the call is ignored. + */ + void (*set_irn_reg)(const arch_irn_ops_t *self, ir_node *irn, + int idx, const arch_register_t *reg); + + /** + * Get the register allocated for an output operand. + * @param irn The node. + * @param pos The index of the output operand. + * @return The register allocated at that operand. NULL, if + * the operand was no register operand or + * @c arch_register_invalid, if no register has yet been + * allocated for this node. + */ + const arch_register_t *(*get_irn_reg)(const arch_irn_ops_t *self, + const ir_node *irn, int idx); + + /** + * Classify the node. + * @param irn The node. + * @return A classification. + */ + arch_irn_class_t (*classify)(const arch_irn_ops_t *self, const ir_node *irn); + }; -#define arch_insn_is_allocatable(insn,reg) \ - ((irn)->get_allocatable_regs(irn, cls, NULL) != 0) +/** + * Get the register requirements for a node. + * @param env The architecture environment. + * @param req A pointer to a requirements structure, where the data can + * be put into. + * @param irn The node. + * @param pos The position of the operand you're interested in. + * @return A pointer to the register requirements which may not + * neccessarily be equal to @p req. If NULL is returned, the + * operand was no register operand. + */ +extern const arch_register_req_t * +arch_get_register_req(const arch_env_t *env, arch_register_req_t *req, + const ir_node *irn, int pos); + +/** + * Check if an operand is a register operand. + * @param env The environment. + * @param irn The node. + * @param pos The position of the operand. + * @return 1, if the operand is significant for register allocation, 0 + * if not. + */ +extern int arch_is_register_operand(const arch_env_t *env, + const ir_node *irn, int pos); + +/** + * Get the number of allocatable registers concerning + * a register class for an operand of a node. + * @param env The environment. + * @param irn The node. + * @param pos The postition of the node's operand. + * @param cls The register class. + * @param bs The bitset all allocatable registers shall be put into. + * Note, that you can also pass NULL here. If you don't, + * make sure, the bitset is as large as the register class + * has registers. + * @return The amount of registers allocatable for that operand. + */ +extern int arch_get_allocatable_regs(const arch_env_t *env, const ir_node *irn, + int pos, const arch_register_class_t *cls, struct _bitset_t *bs); + +/** + * Check, if a register is assignable to an operand of a node. + * @param env The architecture environment. + * @param irn The node. + * @param pos The position of the operand. + * @param reg The register. + * @return 1, if the register might be allocated to the operand 0 if not. + */ +extern int arch_reg_is_allocatable(const arch_env_t *env, + const ir_node *irn, int pos, const arch_register_t *reg); + +/** + * Get the register class of an operand of a node. + * @param env The architecture environment. + * @param irn The node. + * @param idx The position of the operand. + * @return The register class of the operand or NULL, if + * operand is a non-register operand. + */ +extern const arch_register_class_t * +arch_get_irn_reg_class(const arch_env_t *env, const ir_node *irn, int pos); + +/** + * Get the register allocated at a certain output operand of a node. + * @param env The arch nvironment. + * @param irn The node. + * @param idx The index of the output operand. + * @return The register allocated for this operand + */ +extern const arch_register_t * +arch_get_irn_register(const arch_env_t *env, const ir_node *irn, int idx); + +/** + * Set the register for a certain output operand. + * @param env The architecture environment. + * @param irn The node. + * @param idx The index of the output operand. + * @param reg The register. + */ +extern void arch_set_irn_register(const arch_env_t *env, + ir_node *irn, int idx, const arch_register_t *reg); + +#define arch_irn_has_reg_class(env, irn, pos, cls) \ + ((cls) == arch_get_irn_reg_class(env, irn, pos)) + +/** + * Somebody who can be asked about nodes. + */ +struct _arch_irn_handler_t { + + /** + * Get the operations of an irn. + * @param self The handler from which the method is invoked. + * @param irn Some node. + * @return Operations for that irn. + */ + const arch_irn_ops_t *(*get_irn_ops)(const arch_irn_handler_t *handler, + const ir_node *irn); + +}; /** * Architecture interface. @@ -215,58 +431,45 @@ struct _arch_isa_if_t { */ const arch_register_class_t *(*get_reg_class)(int i); - /** - * Put all registers of a given class which are allocatable to a - * certain node into a bitset. - * The bitset contains the indices of the registers concerning - * the register class @p cls. - * @param irn The node. - * @param cls The register class. - * @param bs The bitset. Can be NULL. - * @return The number of registers which are allocatable at this node. - */ - int (*get_allocatable_regs)(const ir_node *irn, - const arch_register_class_t *cls, struct _bitset_t *bs); +}; - /** - * Get the register class, the value of a node belongs to. - * @param irn The node. - * @return The register class of the registers which can hold the - * value of irn. If the node does not return a value, or possesses no - * suitable register class, NULL is returned. - */ - const arch_register_class_t *(*get_irn_reg_class)(const ir_node *irn); +#define ARCH_MAX_HANDLERS 8 +/** + * Environment for the architecture infrastructure. + * Keep this everywhere you're going. + */ +struct _arch_env_t { + const arch_isa_if_t *isa; /** The isa about which everything is. */ + arch_irn_handler_t const *handlers[ARCH_MAX_HANDLERS]; /** The handlers are organized as + a stack. */ - /** - * Get an op for a name. - * @note This method may not be implemented. - * @param name The name of the op. - * @return The op with that name. - */ - ir_op *(*get_op_by_name)(const char *name); + int handlers_tos; /** The stack pointer of the handler + stack. */ }; /** - * Check, if the value of a node can be stored in a - * specific register class. - * @param isa The isa. - * @param irn The node. - * @param cls The register class. - * @return 1, if the value can be stored in the register class, 0 if - * not. + * Get the isa of an arch environment. + * @param env The environment. + * @return The isa with which the env was initialized with. */ -#define arch_isa_irn_has_reg_class(isa, irn, cls) \ - ((isa)->get_irn_reg_class(irn) == (cls)) +#define arch_env_get_isa(env) ((env)->isa) /** - * Check, if a register is allocatable for an irn. - * @param irn The node. - * @param reg The register. - * @return 1, if the register can be allocated to this node, 0 if not. + * Initialize the architecture environment struct. + * @param isa The isa which shall be put into the environment. + * @return The environment. + */ +extern arch_env_t *arch_env_init(arch_env_t *env, const arch_isa_if_t *isa); + +/** + * Add a node handler to the environment. + * @param env The environment. + * @param handler A node handler. + * @return The environment itself. */ -#define arch_isa_reg_is_allocatable(irn, reg) \ - ((isa)->get_allocatable_regs(irn, (reg)->reg_class, NULL) != 0) +extern arch_env_t *arch_env_add_irn_handler(arch_env_t *env, + const arch_irn_handler_t *handler); #endif /* _FIRM_BEARCH_H */