X-Git-Url: http://nsz.repo.hu/git/?a=blobdiff_plain;f=include%2Flibfirm%2Firarch.h;h=79071db40d4f78afefa701c093761d892052c09b;hb=fa9c992b5f23e7a059ac91fdd04b409b951ebcc4;hp=bacbf2bfc247443d311b7d7e16fbc5948963f6f9;hpb=e7ba741cdd9599ce05d7989bff60a1c6137ee0b5;p=libfirm

diff --git a/include/libfirm/irarch.h b/include/libfirm/irarch.h
index bacbf2bfc..79071db40 100644
--- a/include/libfirm/irarch.h
+++ b/include/libfirm/irarch.h
@@ -1,5 +1,5 @@
 /*
- * 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.
  *
@@ -29,6 +29,29 @@
 
 #include "firm_types.h"
 
+/**
+ * The Multiplication replacement can consist of the following instructions.
+ */
+typedef enum instr {
+	LEA,   /**< the LEA instruction */
+	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 */
+} insn_kind;
+
+/**
+ * A Callback for evaluating the costs of an instruction.
+ *
+ * @param kind   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);
+
 /**
  * A parameter structure that drives the machine dependent Firm
  * optimizations.
@@ -36,15 +59,16 @@
 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. */
+	evaluate_costs_func evaluate;  /**< Evaluate the costs of a generated instruction. */
 
 	/* 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 */
 };