* @brief Some machine dependent optimizations.
* @date 1.10.2004
* @author Sebastian Hack
- * @version $Id$
*/
#ifndef FIRM_IR_IRARCH_H
#define FIRM_IR_IRARCH_H
#include "firm_types.h"
+#include "begin.h"
/**
* The Multiplication replacement can consist of the following instructions.
* A Callback for evaluating the costs of an instruction.
*
* @param kind the instruction
+ * @param mode the mode of the instruction
* @param tv for MUL instruction, the multiplication constant
*
* @return the costs of this instruction
*/
-typedef int (*evaluate_costs_func)(insn_kind kind, tarval *tv);
+typedef int (*evaluate_costs_func)(insn_kind kind, const ir_mode *mode, ir_tarval *tv);
/**
* A parameter structure that drives the machine dependent Firm
* optimizations.
*/
-struct ir_settings_arch_dep_t {
+typedef struct ir_settings_arch_dep_t {
/* Mul optimization */
unsigned also_use_subs : 1; /**< Use also Subs when resolving Muls to shifts */
- unsigned maximum_shifts; /**< The maximum number of shifts that shall be inserted for a mul. */
+ unsigned maximum_shifts; /**< The maximum number of shifts that shall be inserted for a mul. */
unsigned highest_shift_amount; /**< The highest shift amount you want to
tolerate. Muls which would require a higher
shift constant are left. */
/* Div/Mod optimization */
unsigned allow_mulhs : 1; /**< Use the Mulhs operation for division by constant */
unsigned allow_mulhu : 1; /**< Use the Mulhu operation for division by constant */
- unsigned max_bits_for_mulh; /**< Maximum number of bits the Mulh operation can take.
+ unsigned max_bits_for_mulh; /**< Maximum number of bits the Mulh operation can take.
Modes with higher amount of bits will use Mulh */
-};
+} ir_settings_arch_dep_t;
/**
* A factory function, that provides architecture parameters for
*/
typedef const ir_settings_arch_dep_t *(*arch_dep_params_factory_t)(void);
-/**
- * A default parameter factory for testing purposes.
- */
-const ir_settings_arch_dep_t *arch_dep_default_factory(void);
-
/**
* Optimization flags.
*/
arch_dep_div_by_const = 2, /**< optimize Div into Shift/Add/Mulh */
arch_dep_mod_by_const = 4 /**< optimize Mod into Shift/Add/Mulh */
} arch_dep_opts_t;
+ENUM_BITSET(arch_dep_opts_t)
/**
- * Initialize the machine dependent optimizations.
- * @param factory A factory that delivers parameters for these
- * optimizations. If NULL is passed, or this method
- * is not called, the machine dependent optimizations
- * are not enabled at all.
- */
-void arch_dep_init(arch_dep_params_factory_t factory);
-
-/**
- * Set the optimizations that shall be applied.
+ * Sets the optimizations that shall be applied.
* @param opts An optimization bit mask.
*/
-void arch_dep_set_opts(arch_dep_opts_t opts);
+FIRM_API void arch_dep_set_opts(arch_dep_opts_t opts);
/**
- * Replace Muls with Shifts and Add/Subs.
- * This function is driven by the 3 parameters:
- * - also_use_subs
- * - maximum_shifts
- * - highest_shift_amount
- *
- * If irn is a Mul with a Const, the constant is inspected if it meets the
- * requirements of the three variables stated above. If a Shl/Add/Sub
- * sequence can be generated that meets these requirements, this expression
- * is returned. In each other case irn is returned unmodified.
+ * Replaces Muls with Lea/Shifts/Add/Subs if these
+ * have smaller costs than the original multiplication.
*
* @param irn The Firm node to inspect.
* @return A replacement expression for irn.
*/
-ir_node *arch_dep_replace_mul_with_shifts(ir_node *irn);
+FIRM_API ir_node *arch_dep_replace_mul_with_shifts(ir_node *irn);
/**
- * Replace Divs with Shifts and Add/Subs and Mulh.
+ * Replaces Divs with Shifts and Add/Subs and Mulh.
* This function is driven by the 3 parameters:
* - allow_mulhu
* - allow_mulhs
* @param irn The Firm node to inspect.
* @return A replacement expression for irn.
*/
-ir_node *arch_dep_replace_div_by_const(ir_node *irn);
+FIRM_API ir_node *arch_dep_replace_div_by_const(ir_node *irn);
/**
- * Replace Mods with Shifts and Add/Subs and Mulh.
+ * Replaces Mods with Shifts and Add/Subs and Mulh.
* This function is driven by the 3 parameters:
* - allow_mulhu
* - allow_mulhs
* @param irn The Firm node to inspect.
* @return A replacement expression for irn.
*/
-ir_node *arch_dep_replace_mod_by_const(ir_node *irn);
+FIRM_API ir_node *arch_dep_replace_mod_by_const(ir_node *irn);
-/**
- * Replace DivMods with Shifts and Add/Subs and Mulh.
- * This function is driven by the 3 parameters:
- * - allow_mulhu
- * - allow_mulhs
- * - max_bits_for_mulh
- *
- * If irn is a DivMod with a Const, the constant is inspected if it meets the
- * requirements of the variables stated above. If a Shl/Add/Sub/Mulh
- * sequence can be generated that meets these requirements, this expression
- * is returned. In each other case irn is returned unmodified.
- *
- * @param div After call contains the Firm node div result or NULL.
- * @param mod After call contains the Firm node mod result or NULL.
- * @param irn The Firm node to inspect.
- */
-void arch_dep_replace_divmod_by_const(ir_node **div, ir_node **mod, ir_node *irn);
+#include "end.h"
#endif
projects / libfirm / blobdiff