ia32_nodes_attr.h

/**
 * Type definitions for ia32 node attributes.
 * @author Christian Wuerdig
 * $Id$
 */

#ifndef _IA32_NODES_ATTR_H_
#define _IA32_NODES_ATTR_H_

#include "firm_config.h"

#include <obstack.h>

#include "firm_types.h"
#include "../bearch.h"
#include "../bemachine.h"

typedef enum { flavour_Div = 1, flavour_Mod, flavour_DivMod } ia32_op_flavour_t;
typedef enum { pn_EAX, pn_EDX } pn_ia32_Register;

typedef enum {
	ia32_Normal,
	ia32_AddrModeD,
	ia32_AddrModeS
} ia32_op_type_t;

typedef enum {
	ia32_ImmNone     = 0,
	ia32_ImmConst    = 1,
	ia32_ImmSymConst = 2
} ia32_immop_type_t;

typedef	enum {
	ia32_am_None   = 0,   /**<< no addrmode support */
	ia32_am_Dest   = 1,   /**<< addrmode for destination only */
	ia32_am_Source = 2,   /**<< addrmode for source only */
	ia32_am_Full   = 3    /**<< full addmode support */
} ia32_am_type_t;

/**
 * Different AM types:
 * O - Offset is set
 * B - Base is set
 * I - Index is set
 * S - Scale is set
 */

enum {
	ia32_O = (1 << 0),
	ia32_B = (1 << 1),
	ia32_I = (1 << 2),
	ia32_S = (1 << 3)
};

typedef enum {
	ia32_am_N    = 0,
	ia32_am_O    = ia32_O,
	ia32_am_B    = ia32_B,
	ia32_am_I    = ia32_I,
	ia32_am_IS   = ia32_I | ia32_S,
	ia32_am_BI   = ia32_B | ia32_I,
	ia32_am_OB   = ia32_O | ia32_B,
	ia32_am_OI   = ia32_O | ia32_I,
	ia32_am_OIS  = ia32_O | ia32_I | ia32_S,
	ia32_am_OBIS = ia32_O | ia32_B | ia32_I | ia32_S
} ia32_am_flavour_t;

enum {
	ia32_pn_Cmp_Unsigned = 0x100 /**< set this flag in a pnc to indicate an unsigned compare operation */
};

typedef struct _ia32_attr_t {
	struct {
		unsigned tp:3;              /**< ia32 node type */
		unsigned imm_tp:2;          /**< ia32 immop type */
		unsigned am_support:2;      /**< indicates addrmode type supported by this node */
		unsigned am_flavour:4;      /**< the concrete addrmode characteristics */
		unsigned am_scale:2;        /**< addrmode scale for index register */

		unsigned offs_sign:1;       /**< sign bit of the first offset */
		unsigned am_sc_sign:1;      /**< sign bit of the address mode symconst */

		unsigned use_frame:1;       /**< indicates whether the operation uses the frame pointer or not */

		ia32_op_flavour_t op_flav:2;/**< flavour of an op (flavour_Div/Mod/DivMod) */

		unsigned flags:4;           /**< indicating if spillable, rematerializeable, stack modifying and/or ignore */

		unsigned is_commutative:1;  /**< indicates whether op is commutative or not */

		unsigned emit_cl:1;         /**< indicates whether we must emit cl instead of ecx (needed for shifts) */

		unsigned got_lea:1;         /**< indicates whether or not this node already consumed a LEA */

		unsigned need_stackent:1;   /**< set to 1 if node need space on stack */

		unsigned n_res:6;           /**< number of results produced by this node */
	} data;

	int       *out_flags;     /**< flags for each produced value */

	int        am_offs;       /**< offsets for AddrMode */
	ir_entity *am_sc;         /**< SymConst for AddrMode */

	union {
		tarval    *tv;        /**< tarval for immediate operations */
		ir_entity *sc;        /**< the symconst ident */
	} cnst_val;

	ir_mode *ls_mode;   /**< the mode of the stored/loaded value, or the mode to convert to */

	ir_entity *frame_ent; /**< the frame entity attached to this node */

	long pn_code;       /**< projnum "types" (e.g. indicate compare operators and argument numbers for switches) */

	unsigned latency;   /**< the latency of the instruction in clock cycles */

#ifndef NDEBUG
	const char *orig_node;      /**< holds the name of the original ir node for debugging purposes */
#endif /* NDEBUG */

	const be_execution_unit_t ***exec_units; /**< list of units this operation can be executed on */

	const arch_register_req_t **in_req;  /**< register requirements for arguments */
	const arch_register_req_t **out_req; /**< register requirements for results */

	const arch_register_t *x87[3];       /**< register slots for x87 register */

	/* must be last, dynamic */
	const arch_register_t *slots[1];     /**< register slots for assigned registers */
} ia32_attr_t;

#endif /* _IA32_NODES_ATTR_H_ */