#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 enum _arch_register_type_t {
arch_register_type_none = 0,
arch_register_type_write_invariant,
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 *
#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)
{
};
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_normal, /** All registers in the class
+ are allowed. */
+
+ arch_register_req_type_limited, /** Only a real subset of
+ the class is allowed. */
+ arch_register_req_type_equal, /** The register must equal
+ another one at the node. */
+
+ arch_register_req_type_unequal, /** The register must be unequal
+ to some other at the node. */
+
+ arch_register_req_type_pair /** The register is part of a
+ register pair. */
+} arch_register_req_type_t;
/**
- * 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_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. */
+/**
+ * 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) (index)
- int same_as_pos; /**< 'Same as' position for equals. */
-} arch_operand_data_t;
+/**
+ * Make an out position from an index.
+ * @param index The index.
+ * @return The position representing the index as an out operand.
+ */
+#define arch_pos_make_out(index) (-((index) + 1))
/**
- * An operand to an instruction.
+ * 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_operand_t {
- arch_operand_type_t type; /**< The type of the operand. */
- arch_operand_data_t data; /**< The payload. */
-};
+#define arch_pos_is_in(pos) ((pos) >= 0)
/**
- * An instruction format.
+ * Check, if a position denotes an output operand.
+ * @param pos The position.
+ * @return 1, if the position denotes an output 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_out(pos) (!arch_pos_is_in(pos))
- arch_operand_t * const *in_operands; /**< In operands. */
- arch_operand_t * const *out_operands; /**< Out operands. */
-};
+/**
+ * Get the index of a position.
+ * @param pos The position.
+ * @return The index of the position.
+ */
+#define arch_pos_get_index(pos) ((pos) < 0 ? -(pos) - 1 : (pos))
+
+typedef struct _arch_irn_ops_t {
+
+ /**
+ * Get the register requirements for a given operand.
+ * @param irn The node.
+ * @param pos The operand's position.
+ * @return The register requirements for the selected operand,
+ * or NULL, if the operand is no register.
+ */
+ const arch_register_req_t *(*get_irn_reg_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 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)(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 ir_node *irn, int idx);
+
+ /**
+ * Classify the node.
+ * @param irn The node.
+ * @return A classification.
+ */
+ arch_irn_class_t (*classify)(const ir_node *irn);
+
+} arch_irn_ops_t;
/**
- * An instruction.
+ * 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.
*/
-struct _arch_insn_t {
- const arch_insn_format_t *format; /**< The format of the instruction. */
- ir_op *op; /**< The firm opcode for this insn. */
-};
+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);
-#define arch_insn_is_allocatable(insn,reg) \
- ((irn)->get_allocatable_regs(irn, cls, NULL) != 0)
+/**
+ * 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.
+ */
+typedef struct _arch_irn_handler_t {
+
+ /**
+ * Get the operations of an irn.
+ * @param irn Some node.
+ * @return Operations for that irn.
+ */
+ const arch_irn_ops_t *(*get_irn_ops)(const ir_node *irn);
+
+} arch_irn_handler_t;
/**
* Architecture interface.
*/
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 */
projects / libfirm / blobdiff