libfirm/irarch.h

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/*
 * Copyright (C) 1995-2008 University of Karlsruhe.  All right reserved.
 *
 * This file is part of libFirm.
 *
 * This file may be distributed and/or modified under the terms of the
 * GNU General Public License version 2 as published by the Free Software
 * Foundation and appearing in the file LICENSE.GPL included in the
 * packaging of this file.
 *
 * Licensees holding valid libFirm Professional Edition licenses may use
 * this file in accordance with the libFirm Commercial License.
 * Agreement provided with the Software.
 *
 * This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
 * WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 * PURPOSE.
 */

#ifndef FIRM_IR_IRARCH_H
#define FIRM_IR_IRARCH_H

#include "firm_types.h"
#include "begin.h"

typedef enum instr {
    LEA,   
    SHIFT, 
    SUB,   
    ADD,   
    ZERO,  
    MUL,   
    ROOT   
} insn_kind;

typedef int (*evaluate_costs_func)(insn_kind kind, const ir_mode *mode, ir_tarval *tv);

typedef struct ir_settings_arch_dep_t {
    /* Mul optimization */
    unsigned also_use_subs : 1;    
    unsigned maximum_shifts;       
    unsigned highest_shift_amount; 
    evaluate_costs_func evaluate;  
    /* Div/Mod optimization */
    unsigned allow_mulhs   : 1;    
    unsigned allow_mulhu   : 1;    
    unsigned max_bits_for_mulh;    
} ir_settings_arch_dep_t;

typedef const ir_settings_arch_dep_t *(*arch_dep_params_factory_t)(void);

typedef enum {
    arch_dep_none         = 0,
    arch_dep_mul_to_shift = 1,  
    arch_dep_div_by_const = 2,  
    arch_dep_mod_by_const = 4   
} arch_dep_opts_t;
ENUM_BITSET(arch_dep_opts_t)


FIRM_API void arch_dep_set_opts(arch_dep_opts_t opts);

FIRM_API ir_node *arch_dep_replace_mul_with_shifts(ir_node *irn);

FIRM_API ir_node *arch_dep_replace_div_by_const(ir_node *irn);

FIRM_API ir_node *arch_dep_replace_mod_by_const(ir_node *irn);

#include "end.h"

#endif