/*
- * Copyright (C) 1995-2007 University of Karlsruhe. All right reserved.
+ * Copyright (C) 1995-2008 University of Karlsruhe. All right reserved.
*
* This file is part of libFirm.
*
#define FIRM_IR_IRARCH_H
#include "firm_types.h"
+#include "begin.h"
/**
* The Multiplication replacement can consist of the following instructions.
SHIFT, /**< the SHIFT instruction */
SUB, /**< the SUB instruction */
ADD, /**< the ADD instruction */
+ ZERO, /**< creates a ZERO constant */
MUL, /**< the original MUL instruction */
- ROOT, /**< the ROOT value that is multiplied */
+ ROOT /**< the ROOT value that is multiplied */
} insn_kind;
/**
struct ir_settings_arch_dep_t {
/* Mul optimization */
unsigned also_use_subs : 1; /**< Use also Subs when resolving Muls to shifts */
- int 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 */
- int 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 */
};
/**
* A default parameter factory for testing purposes.
*/
-const ir_settings_arch_dep_t *arch_dep_default_factory(void);
+FIRM_API const ir_settings_arch_dep_t *arch_dep_default_factory(void);
/**
* Optimization flags.
* is not called, the machine dependent optimizations
* are not enabled at all.
*/
-void arch_dep_init(arch_dep_params_factory_t factory);
+FIRM_API void arch_dep_init(arch_dep_params_factory_t factory);
/**
* Set 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.
+ * Replace 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.
* @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.
* @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.
* @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);
+FIRM_API void arch_dep_replace_divmod_by_const(ir_node **div, ir_node **mod,
+ ir_node *irn);
+
+#include "end.h"
#endif