X-Git-Url: http://nsz.repo.hu/git/?a=blobdiff_plain;f=ir%2Fir%2Firmode.c;h=4d0da3da4dd8a8faf6a856b98fb2ffe5ed67c265;hb=b7bf9774e5e704382bdf3eb7c09bc5755d4f067e;hp=eba8facf25ece726de99853d5492f3185fcefad0;hpb=b2883fe45bd4299e88e841cceb78097293fcdae0;p=libfirm

diff --git a/ir/ir/irmode.c b/ir/ir/irmode.c
index eba8facf2..4d0da3da4 100644
--- a/ir/ir/irmode.c
+++ b/ir/ir/irmode.c
@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 1995-2008 University of Karlsruhe.  All right reserved.
+ * Copyright (C) 1995-2011 University of Karlsruhe.  All right reserved.
  *
  * This file is part of libFirm.
  *
@@ -23,41 +23,42 @@
  * @author   Martin Trapp, Christian Schaefer, Goetz Lindenmaier, Mathias Heil
  * @version  $Id$
  */
-#ifdef HAVE_CONFIG_H
-# include "config.h"
-#endif
-
-#ifdef HAVE_STDLIB_H
-# include <stdlib.h>
-#endif
-#ifdef HAVE_STRING_H
-# include <string.h>
-#endif
-
-# include <stddef.h>
-
-# include "irprog_t.h"
-# include "irmode_t.h"
-# include "ident.h"
-# include "tv_t.h"
-# include "obst.h"
-# include "irhooks.h"
-# include "irtools.h"
+#include "config.h"
 
-/* * *
- * local values
- * * */
+#include <stdlib.h>
+#include <string.h>
+
+#include <stddef.h>
 
+#include "irprog_t.h"
+#include "irmode_t.h"
+#include "ident.h"
+#include "tv_t.h"
+#include "obst.h"
+#include "irhooks.h"
+#include "irtools.h"
+#include "array.h"
+#include "error.h"
+#include "pattern_dmp.h"
 
-/** dynamic array to hold all modes */
+/** Obstack to hold all modes. */
 static struct obstack modes;
 
-/** number of defined modes */
-static int num_modes = 0;
+/** The list of all currently existing modes. */
+static ir_mode **mode_list;
 
-/* * *
- * local functions
- * * */
+const char *get_mode_arithmetic_name(ir_mode_arithmetic ari)
+{
+#define X(a)    case a: return #a
+	switch (ari) {
+		X(irma_uninitialized);
+		X(irma_none);
+		X(irma_twos_complement);
+		X(irma_ieee754);
+		default: return "<unknown>";
+	}
+#undef X
+}
 
 /**
  * Compare modes that don't need to have their code field
@@ -65,7 +66,8 @@ static int num_modes = 0;
  *
  * TODO: Add other fields
  **/
-INLINE static int modes_are_equal(const ir_mode *m, const ir_mode *n) {
+static inline int modes_are_equal(const ir_mode *m, const ir_mode *n)
+{
 	if (m == n) return 1;
 	if (m->sort         == n->sort &&
 		m->arithmetic   == n->arithmetic &&
@@ -78,59 +80,27 @@ INLINE static int modes_are_equal(const ir_mode *m, const ir_mode *n) {
 	return 0;
 }
 
-/*
- * calculates the next obstack address
- */
-static void *next_obstack_adr(struct obstack *o, void *p, size_t s) {
-	PTR_INT_TYPE adr = PTR_TO_INT((char *)p);
-	int mask = obstack_alignment_mask(o);
-
-	adr += s + mask;
-
-	return INT_TO_PTR(adr & ~mask);
-}
-
 /**
  * searches the modes obstack for the given mode and returns
  * a pointer on an equal mode already in the array, NULL if
  * none found
  */
-static ir_mode *find_mode(const ir_mode *m) {
-	ir_mode *n, *nn;
-	struct _obstack_chunk	*p;
-
-	p  = modes.chunk;
-	n  = (ir_mode *)p->contents;
-	nn = next_obstack_adr(&modes, n, sizeof(*n));
-	for (; (char *)nn <= modes.next_free;) {
-		assert(is_mode(n));
+static ir_mode *find_mode(const ir_mode *m)
+{
+	size_t i, n_modes;
+	for (i = 0, n_modes = ARR_LEN(mode_list); i < n_modes; ++i) {
+		ir_mode *n = mode_list[i];
 		if (modes_are_equal(n, m))
 			return n;
-
-		n  = nn;
-		nn = next_obstack_adr(&modes, n, sizeof(*n));
 	}
-
-	for (p = p->prev; p; p = p->prev) {
-		n  = (ir_mode *)p->contents;
-		nn = next_obstack_adr(&modes, n, sizeof(*n));
-		for (; (char *)nn < p->limit;) {
-			assert(is_mode(n));
-			if (modes_are_equal(n, m))
-				return n;
-
-			n  = nn;
-			nn = next_obstack_adr(&modes, n, sizeof(*n));
-		}
-	}
-
 	return NULL;
 }
 
 /**
  * sets special values of modes
  */
-static void set_mode_values(ir_mode* mode) {
+static void set_mode_values(ir_mode* mode)
+{
 	switch (get_mode_sort(mode))    {
 	case irms_reference:
 	case irms_int_number:
@@ -140,7 +110,7 @@ static void set_mode_values(ir_mode* mode) {
 		mode->null = get_tarval_null(mode);
 		mode->one  = get_tarval_one(mode);
 		mode->minus_one = get_tarval_minus_one(mode);
-		if(get_mode_sort(mode) != irms_float_number) {
+		if (get_mode_sort(mode) != irms_float_number) {
 			mode->all_one = get_tarval_all_one(mode);
 		} else {
 			mode->all_one = tarval_bad;
@@ -233,22 +203,27 @@ ir_mode *get_modeANY(void) { return mode_ANY; }
 ir_mode *get_modeBAD(void) { return mode_BAD; }
 
 
-ir_mode *(get_modeP_code)(void) {
+ir_mode *(get_modeP_code)(void)
+{
 	return _get_modeP_code();
 }
 
-ir_mode *(get_modeP_data)(void) {
+ir_mode *(get_modeP_data)(void)
+{
 	return _get_modeP_data();
 }
 
-void set_modeP_code(ir_mode *p) {
+void set_modeP_code(ir_mode *p)
+{
 	assert(mode_is_reference(p));
 	mode_P_code = p;
 }
 
-void set_modeP_data(ir_mode *p) {
+void set_modeP_data(ir_mode *p)
+{
 	assert(mode_is_reference(p));
 	mode_P_data = p;
+	mode_P = p;
 }
 
 /**
@@ -256,19 +231,18 @@ void set_modeP_data(ir_mode *p) {
  *
  * @param new_mode  The new mode template.
  */
-static ir_mode *register_mode(const ir_mode *new_mode) {
+static ir_mode *register_mode(const ir_mode *new_mode)
+{
 	ir_mode *mode = NULL;
 
 	assert(new_mode);
 
 	/* copy mode struct to modes array */
 	mode = (ir_mode *)obstack_copy(&modes, new_mode, sizeof(*mode));
+	ARR_APP1(ir_mode*, mode_list, mode);
 
 	mode->kind = k_ir_mode;
-	if (num_modes >= irm_max)  {
-		mode->code = num_modes;
-	}
-	num_modes++;
+	mode->type = new_type_primitive(mode);
 
 	/* add the new mode to the irp list of modes */
 	add_irp_mode(mode);
@@ -282,8 +256,8 @@ static ir_mode *register_mode(const ir_mode *new_mode) {
 /*
  * Creates a new mode.
  */
-ir_mode *new_ir_mode(const char *name, mode_sort sort, int bit_size, int sign,
-                     mode_arithmetic arithmetic, unsigned int modulo_shift)
+ir_mode *new_ir_mode(const char *name, ir_mode_sort sort, int bit_size, int sign,
+                     ir_mode_arithmetic arithmetic, unsigned int modulo_shift)
 {
 	ir_mode mode_tmpl;
 	ir_mode *mode = NULL;
@@ -292,7 +266,8 @@ ir_mode *new_ir_mode(const char *name, mode_sort sort, int bit_size, int sign,
 	mode_tmpl.sort         = sort;
 	mode_tmpl.size         = bit_size;
 	mode_tmpl.sign         = sign ? 1 : 0;
-	mode_tmpl.modulo_shift = (mode_tmpl.sort == irms_int_number) ? modulo_shift : 0;
+	mode_tmpl.modulo_shift = (mode_tmpl.sort == irms_int_number ||
+	                          mode_tmpl.sort == irms_reference) ? modulo_shift : 0;
 	mode_tmpl.vector_elem  = 1;
 	mode_tmpl.arithmetic   = arithmetic;
 	mode_tmpl.link         = NULL;
@@ -310,22 +285,23 @@ ir_mode *new_ir_mode(const char *name, mode_sort sort, int bit_size, int sign,
 	case irms_control_flow:
 	case irms_memory:
 	case irms_internal_boolean:
-		assert(0 && "internal modes cannot be user defined");
-		break;
+		panic("internal modes cannot be user defined");
 
 	case irms_float_number:
 	case irms_int_number:
 	case irms_reference:
 		mode = register_mode(&mode_tmpl);
+		break;
 	}
+	assert(mode != NULL);
 	return mode;
 }
 
 /*
  * Creates a new vector mode.
  */
-ir_mode *new_ir_vector_mode(const char *name, mode_sort sort, int bit_size, unsigned num_of_elem, int sign,
-                            mode_arithmetic arithmetic, unsigned int modulo_shift)
+ir_mode *new_ir_vector_mode(const char *name, ir_mode_sort sort, int bit_size, unsigned num_of_elem, int sign,
+                            ir_mode_arithmetic arithmetic, unsigned int modulo_shift)
 {
 	ir_mode mode_tmpl;
 	ir_mode *mode = NULL;
@@ -347,8 +323,7 @@ ir_mode *new_ir_vector_mode(const char *name, mode_sort sort, int bit_size, unsi
 	}
 
 	if (num_of_elem <= 1) {
-		assert(0 && "vector modes should have at least 2 elements");
-		return NULL;
+		panic("vector modes should have at least 2 elements");
 	}
 
 	/* sanity checks */
@@ -357,53 +332,54 @@ ir_mode *new_ir_vector_mode(const char *name, mode_sort sort, int bit_size, unsi
 	case irms_control_flow:
 	case irms_memory:
 	case irms_internal_boolean:
-		assert(0 && "internal modes cannot be user defined");
-		break;
+		panic("internal modes cannot be user defined");
 
 	case irms_reference:
-		assert(0 && "only integer and floating point modes can be vectorized");
-		break;
+		panic("only integer and floating point modes can be vectorized");
 
 	case irms_float_number:
-		assert(0 && "not yet implemented");
-		break;
+		panic("not yet implemented");
 
 	case irms_int_number:
 		mode = register_mode(&mode_tmpl);
 	}
+	assert(mode != NULL);
 	return mode;
 }
 
 /* Functions for the direct access to all attributes of an ir_mode */
-modecode (get_mode_modecode)(const ir_mode *mode) {
-	return _get_mode_modecode(mode);
-}
-
-ident *(get_mode_ident)(const ir_mode *mode) {
+ident *(get_mode_ident)(const ir_mode *mode)
+{
 	return _get_mode_ident(mode);
 }
 
-const char *get_mode_name(const ir_mode *mode) {
+const char *get_mode_name(const ir_mode *mode)
+{
 	return get_id_str(mode->name);
 }
 
-mode_sort (get_mode_sort)(const ir_mode* mode) {
+ir_mode_sort (get_mode_sort)(const ir_mode* mode)
+{
 	return _get_mode_sort(mode);
 }
 
-unsigned (get_mode_size_bits)(const ir_mode *mode) {
+unsigned (get_mode_size_bits)(const ir_mode *mode)
+{
 	return _get_mode_size_bits(mode);
 }
 
-unsigned (get_mode_size_bytes)(const ir_mode *mode) {
+unsigned (get_mode_size_bytes)(const ir_mode *mode)
+{
 	return _get_mode_size_bytes(mode);
 }
 
-int (get_mode_sign)(const ir_mode *mode) {
+int (get_mode_sign)(const ir_mode *mode)
+{
 	return _get_mode_sign(mode);
 }
 
-mode_arithmetic (get_mode_arithmetic)(const ir_mode *mode) {
+ir_mode_arithmetic (get_mode_arithmetic)(const ir_mode *mode)
+{
 	return get_mode_arithmetic(mode);
 }
 
@@ -412,134 +388,147 @@ mode_arithmetic (get_mode_arithmetic)(const ir_mode *mode) {
  *  whether shift applies modulo to value of bits to shift.  Asserts
  *  if mode is not irms_int_number.
  */
-unsigned int (get_mode_modulo_shift)(const ir_mode *mode) {
+unsigned int (get_mode_modulo_shift)(const ir_mode *mode)
+{
 	return _get_mode_modulo_shift(mode);
 }
 
-unsigned int (get_mode_n_vector_elems)(const ir_mode *mode) {
+unsigned int (get_mode_n_vector_elems)(const ir_mode *mode)
+{
 	return _get_mode_vector_elems(mode);
 }
 
-void *(get_mode_link)(const ir_mode *mode) {
+void *(get_mode_link)(const ir_mode *mode)
+{
 	return _get_mode_link(mode);
 }
 
-void (set_mode_link)(ir_mode *mode, void *l) {
+void (set_mode_link)(ir_mode *mode, void *l)
+{
 	_set_mode_link(mode, l);
 }
 
-tarval *get_mode_min(ir_mode *mode) {
+ir_tarval *get_mode_min(ir_mode *mode)
+{
 	assert(mode);
-	assert(get_mode_modecode(mode) < (modecode) num_modes);
 	assert(mode_is_data(mode));
 
 	return mode->min;
 }
 
-tarval *get_mode_max(ir_mode *mode) {
+ir_tarval *get_mode_max(ir_mode *mode)
+{
 	assert(mode);
-	assert(get_mode_modecode(mode) < (modecode) num_modes);
 	assert(mode_is_data(mode));
 
 	return mode->max;
 }
 
-tarval *get_mode_null(ir_mode *mode) {
+ir_tarval *get_mode_null(ir_mode *mode)
+{
 	assert(mode);
-	assert(get_mode_modecode(mode) < (modecode) num_modes);
 	assert(mode_is_datab(mode));
 
 	return mode->null;
 }
 
-tarval *get_mode_one(ir_mode *mode) {
+ir_tarval *get_mode_one(ir_mode *mode)
+{
 	assert(mode);
-	assert(get_mode_modecode(mode) < (modecode) num_modes);
 	assert(mode_is_datab(mode));
 
 	return mode->one;
 }
 
-tarval *get_mode_minus_one(ir_mode *mode) {
+ir_tarval *get_mode_minus_one(ir_mode *mode)
+{
 	assert(mode);
-	assert(get_mode_modecode(mode) < (modecode) num_modes);
 	assert(mode_is_data(mode));
 
 	return mode->minus_one;
 }
 
-tarval *get_mode_all_one(ir_mode *mode) {
+ir_tarval *get_mode_all_one(ir_mode *mode)
+{
 	assert(mode);
-	assert(get_mode_modecode(mode) < (modecode) num_modes);
 	assert(mode_is_datab(mode));
 	return mode->all_one;
 }
 
-tarval *get_mode_infinite(ir_mode *mode) {
+ir_tarval *get_mode_infinite(ir_mode *mode)
+{
 	assert(mode);
-	assert(get_mode_modecode(mode) < (modecode) num_modes);
 	assert(mode_is_float(mode));
 
 	return get_tarval_plus_inf(mode);
 }
 
-tarval *get_mode_NAN(ir_mode *mode) {
+ir_tarval *get_mode_NAN(ir_mode *mode)
+{
 	assert(mode);
-	assert(get_mode_modecode(mode) < (modecode) num_modes);
 	assert(mode_is_float(mode));
 
 	return get_tarval_nan(mode);
 }
 
-int is_mode(void *thing) {
-	if (get_kind(thing) == k_ir_mode)
-		return 1;
-	else
-		return 0;
+int is_mode(const void *thing)
+{
+	return get_kind(thing) == k_ir_mode;
 }
 
-int (mode_is_signed)(const ir_mode *mode) {
+int (mode_is_signed)(const ir_mode *mode)
+{
 	return _mode_is_signed(mode);
 }
 
-int (mode_is_float)(const ir_mode *mode) {
+int (mode_is_float)(const ir_mode *mode)
+{
 	return _mode_is_float(mode);
 }
 
-int (mode_is_int)(const ir_mode *mode) {
+int (mode_is_int)(const ir_mode *mode)
+{
 	return _mode_is_int(mode);
 }
 
-int (mode_is_reference)(const ir_mode *mode) {
+int (mode_is_reference)(const ir_mode *mode)
+{
 	return _mode_is_reference(mode);
 }
 
-int (mode_is_num)(const ir_mode *mode) {
+int (mode_is_num)(const ir_mode *mode)
+{
 	return _mode_is_num(mode);
 }
 
-int (mode_is_data)(const ir_mode *mode) {
+int (mode_is_data)(const ir_mode *mode)
+{
 	return _mode_is_data(mode);
 }
 
-int (mode_is_datab)(const ir_mode *mode) {
+int (mode_is_datab)(const ir_mode *mode)
+{
 	return _mode_is_datab(mode);
 }
 
-int (mode_is_dataM)(const ir_mode *mode) {
+int (mode_is_dataM)(const ir_mode *mode)
+{
 	return _mode_is_dataM(mode);
 }
 
-int (mode_is_float_vector)(const ir_mode *mode) {
+int (mode_is_float_vector)(const ir_mode *mode)
+{
 	return _mode_is_float_vector(mode);
 }
 
-int (mode_is_int_vector)(const ir_mode *mode) {
+int (mode_is_int_vector)(const ir_mode *mode)
+{
 	return _mode_is_int_vector(mode);
 }
 
 /* Returns true if sm can be converted to lm without loss. */
-int smaller_mode(const ir_mode *sm, const ir_mode *lm) {
+int smaller_mode(const ir_mode *sm, const ir_mode *lm)
+{
 	int sm_bits, lm_bits;
 
 	assert(sm);
@@ -554,11 +543,11 @@ int smaller_mode(const ir_mode *sm, const ir_mode *lm) {
 	case irms_int_number:
 		switch (get_mode_sort(lm)) {
 		case irms_int_number:
-			if(get_mode_arithmetic(sm) != get_mode_arithmetic(lm))
+			if (get_mode_arithmetic(sm) != get_mode_arithmetic(lm))
 				return 0;
 
 			/* only two complement implemented */
-			assert(get_mode_arithmetic(sm)==irma_twos_complement);
+			assert(get_mode_arithmetic(sm) == irma_twos_complement);
 
 			/* integers are convertable if
 			 *   - both have the same sign and lm is the larger one
@@ -566,17 +555,16 @@ int smaller_mode(const ir_mode *sm, const ir_mode *lm) {
 			 *     (one for the sign, one for the highest bit of sm)
 			 *   - sm & lm are two_complement and lm has greater or equal number of bits
 			 */
-			if(mode_is_signed(sm)) {
-				if(!mode_is_signed(lm))
+			if (mode_is_signed(sm)) {
+				if (!mode_is_signed(lm))
 					return 0;
 				return sm_bits <= lm_bits;
 			} else {
-				if(mode_is_signed(lm)) {
+				if (mode_is_signed(lm)) {
 					return sm_bits < lm_bits;
 				}
 				return sm_bits <= lm_bits;
 			}
-			break;
 
 		case irms_float_number:
 			/* int to float works if the float is large enough */
@@ -596,7 +584,7 @@ int smaller_mode(const ir_mode *sm, const ir_mode *lm) {
 		break;
 
 	case irms_reference:
-		/* do exist machines out there with different pointer lenghts ?*/
+		/* do exist machines out there with different pointer lengths ?*/
 		return 0;
 
 	case irms_internal_boolean:
@@ -610,39 +598,72 @@ int smaller_mode(const ir_mode *sm, const ir_mode *lm) {
 	return 0;
 }
 
+/* Returns true if a value of mode sm can be converted into mode lm
+   and backwards without loss. */
+int values_in_mode(const ir_mode *sm, const ir_mode *lm)
+{
+	ir_mode_arithmetic arith;
+
+	assert(sm);
+	assert(lm);
+
+	if (sm == lm) return 1;
+
+	if (sm == mode_b)
+		return mode_is_int(lm);
+
+	arith = get_mode_arithmetic(sm);
+	if (arith != get_mode_arithmetic(lm))
+		return 0;
+
+	switch (arith) {
+		case irma_twos_complement:
+		case irma_ieee754:
+			return get_mode_size_bits(sm) <= get_mode_size_bits(lm);
+
+		default:
+			return 0;
+	}
+}
+
 /* Return the signed integer equivalent mode for an reference mode. */
-ir_mode *get_reference_mode_signed_eq(ir_mode *mode) {
+ir_mode *get_reference_mode_signed_eq(ir_mode *mode)
+{
 	assert(mode_is_reference(mode));
 	return mode->eq_signed;
 }
 
 /* Sets the signed integer equivalent mode for an reference mode. */
-void set_reference_mode_signed_eq(ir_mode *ref_mode, ir_mode *int_mode) {
+void set_reference_mode_signed_eq(ir_mode *ref_mode, ir_mode *int_mode)
+{
 	assert(mode_is_reference(ref_mode));
 	assert(mode_is_int(int_mode));
 	ref_mode->eq_signed = int_mode;
 }
 
 /* Return the unsigned integer equivalent mode for an reference mode. */
-ir_mode *get_reference_mode_unsigned_eq(ir_mode *mode) {
+ir_mode *get_reference_mode_unsigned_eq(ir_mode *mode)
+{
 	assert(mode_is_reference(mode));
 	return mode->eq_unsigned;
 }
 
 /* Sets the unsigned integer equivalent mode for an reference mode. */
-void set_reference_mode_unsigned_eq(ir_mode *ref_mode, ir_mode *int_mode) {
+void set_reference_mode_unsigned_eq(ir_mode *ref_mode, ir_mode *int_mode)
+{
 	assert(mode_is_reference(ref_mode));
 	assert(mode_is_int(int_mode));
 	ref_mode->eq_unsigned = int_mode;
 }
 
 /* initialization, build the default modes */
-void init_mode(void) {
+void init_mode(void)
+{
 	ir_mode newmode;
 
 	obstack_init(&modes);
+	mode_list = NEW_ARR_F(ir_mode*, 0);
 
-	num_modes  =  0;
 	/* initialize predefined modes */
 
 	/* Internal Modes */
@@ -661,54 +682,40 @@ void init_mode(void) {
 
 	/* Basic Block */
 	newmode.name    = new_id_from_chars("BB", 2);
-	newmode.code    = irm_BB;
-
-	mode_BB = register_mode(&newmode);
+	mode_BB         = register_mode(&newmode);
 
 	/* eXecution */
 	newmode.name    = new_id_from_chars("X", 1);
-	newmode.code    = irm_X;
-
-	mode_X = register_mode(&newmode);
+	mode_X          = register_mode(&newmode);
 
 	/* Memory Modes */
 	newmode.sort    = irms_memory;
 
 	/* Memory */
 	newmode.name    = new_id_from_chars("M", 1);
-	newmode.code    = irm_M;
-
-	mode_M = register_mode(&newmode);
+	mode_M          = register_mode(&newmode);
 
 	/* Auxiliary Modes */
 	newmode.sort    = irms_auxiliary,
 
 	/* Tuple */
 	newmode.name    = new_id_from_chars("T", 1);
-	newmode.code    = irm_T;
-
-	mode_T = register_mode(&newmode);
+	mode_T          = register_mode(&newmode);
 
 	/* ANY */
 	newmode.name    = new_id_from_chars("ANY", 3);
-	newmode.code    = irm_ANY;
-
-	mode_ANY = register_mode(&newmode);
+	mode_ANY        = register_mode(&newmode);
 
 	/* BAD */
 	newmode.name    = new_id_from_chars("BAD", 3);
-	newmode.code    = irm_BAD;
-
-	mode_BAD = register_mode(&newmode);
+	mode_BAD        = register_mode(&newmode);
 
 	/* Internal Boolean Modes */
 	newmode.sort    = irms_internal_boolean;
 
 	/* boolean */
 	newmode.name    = new_id_from_chars("b", 1);
-	newmode.code    = irm_b;
-
-	mode_b = register_mode(&newmode);
+	mode_b          = register_mode(&newmode);
 
 	/* Data Modes */
 	newmode.vector_elem = 1;
@@ -719,27 +726,23 @@ void init_mode(void) {
 
 	/* float */
 	newmode.name    = new_id_from_chars("F", 1);
-	newmode.code    = irm_F;
 	newmode.sign    = 1;
 	newmode.size    = 32;
-
-	mode_F = register_mode(&newmode);
+	mode_F          = register_mode(&newmode);
 
 	/* double */
 	newmode.name    = new_id_from_chars("D", 1);
-	newmode.code    = irm_D;
 	newmode.sign    = 1;
 	newmode.size    = 64;
-
-	mode_D = register_mode(&newmode);
+	mode_D          = register_mode(&newmode);
 
 	/* extended */
 	newmode.name    = new_id_from_chars("E", 1);
-	newmode.code    = irm_E;
 	newmode.sign    = 1;
-	newmode.size    = 80;
-
-	mode_E = register_mode(&newmode);
+	/* note that the tarval module is calculating with 80 bits, but we use
+	 * 96 bits, as that is what will be stored to memory by most hardware */
+	newmode.size    = 96;
+	mode_E          = register_mode(&newmode);
 
 	/* Integer Number Modes */
 	newmode.sort         = irms_int_number;
@@ -747,94 +750,74 @@ void init_mode(void) {
 
 	/* signed byte */
 	newmode.name         = new_id_from_chars("Bs", 2);
-	newmode.code         = irm_Bs;
 	newmode.sign         = 1;
 	newmode.size         = 8;
 	newmode.modulo_shift = 32;
-
-	mode_Bs = register_mode(&newmode);
+	mode_Bs              = register_mode(&newmode);
 
 	/* unsigned byte */
 	newmode.name         = new_id_from_chars("Bu", 2);
-	newmode.code         = irm_Bu;
 	newmode.arithmetic   = irma_twos_complement;
 	newmode.sign         = 0;
 	newmode.size         = 8;
 	newmode.modulo_shift = 32;
-
-	mode_Bu = register_mode(&newmode);
+	mode_Bu              = register_mode(&newmode);
 
 	/* signed short integer */
 	newmode.name         = new_id_from_chars("Hs", 2);
-	newmode.code         = irm_Hs;
 	newmode.sign         = 1;
 	newmode.size         = 16;
 	newmode.modulo_shift = 32;
-
-	mode_Hs = register_mode(&newmode);
+	mode_Hs              = register_mode(&newmode);
 
 	/* unsigned short integer */
 	newmode.name         = new_id_from_chars("Hu", 2);
-	newmode.code         = irm_Hu;
 	newmode.sign         = 0;
 	newmode.size         = 16;
 	newmode.modulo_shift = 32;
-
-	mode_Hu = register_mode(&newmode);
+	mode_Hu              = register_mode(&newmode);
 
 	/* signed integer */
 	newmode.name         = new_id_from_chars("Is", 2);
-	newmode.code         = irm_Is;
 	newmode.sign         = 1;
 	newmode.size         = 32;
 	newmode.modulo_shift = 32;
-
-	mode_Is = register_mode(&newmode);
+	mode_Is              = register_mode(&newmode);
 
 	/* unsigned integer */
 	newmode.name         = new_id_from_chars("Iu", 2);
-	newmode.code         = irm_Iu;
 	newmode.sign         = 0;
 	newmode.size         = 32;
 	newmode.modulo_shift = 32;
-
-	mode_Iu = register_mode(&newmode);
+	mode_Iu              = register_mode(&newmode);
 
 	/* signed long integer */
 	newmode.name         = new_id_from_chars("Ls", 2);
-	newmode.code         = irm_Ls;
 	newmode.sign         = 1;
 	newmode.size         = 64;
 	newmode.modulo_shift = 64;
-
-	mode_Ls = register_mode(&newmode);
+	mode_Ls              = register_mode(&newmode);
 
 	/* unsigned long integer */
 	newmode.name         = new_id_from_chars("Lu", 2);
-	newmode.code         = irm_Lu;
 	newmode.sign         = 0;
 	newmode.size         = 64;
 	newmode.modulo_shift = 64;
-
-	mode_Lu = register_mode(&newmode);
+	mode_Lu              = register_mode(&newmode);
 
 	/* signed long long integer */
 	newmode.name         = new_id_from_chars("LLs", 3);
-	newmode.code         = irm_LLs;
 	newmode.sign         = 1;
 	newmode.size         = 128;
 	newmode.modulo_shift = 128;
-
-	mode_LLs = register_mode(&newmode);
+	mode_LLs             = register_mode(&newmode);
 
 	/* unsigned long long integer */
 	newmode.name         = new_id_from_chars("LLu", 3);
-	newmode.code         = irm_LLu;
 	newmode.sign         = 0;
 	newmode.size         = 128;
 	newmode.modulo_shift = 128;
-
-	mode_LLu = register_mode(&newmode);
+	mode_LLu             = register_mode(&newmode);
 
 	/* Reference Mode */
 	newmode.sort       = irms_reference;
@@ -842,14 +825,12 @@ void init_mode(void) {
 
 	/* pointer */
 	newmode.name         = new_id_from_chars("P", 1);
-	newmode.code         = irm_P;
 	newmode.sign         = 0;
 	newmode.size         = 32;
-	newmode.modulo_shift = 0;
+	newmode.modulo_shift = 32;
 	newmode.eq_signed    = mode_Is;
 	newmode.eq_unsigned  = mode_Iu;
-
-	mode_P = register_mode(&newmode);
+	mode_P               = register_mode(&newmode);
 
 	/* set the machine specific modes to the predefined ones */
 	mode_P_code = mode_P;
@@ -857,16 +838,22 @@ void init_mode(void) {
 }
 
 /* find a signed mode for an unsigned integer mode */
-ir_mode *find_unsigned_mode(const ir_mode *mode) {
+ir_mode *find_unsigned_mode(const ir_mode *mode)
+{
 	ir_mode n = *mode;
 
-	assert(mode->sort == irms_int_number);
+	/* allowed for reference mode */
+	if (mode->sort == irms_reference)
+		n.sort = irms_int_number;
+
+	assert(n.sort == irms_int_number);
 	n.sign = 0;
 	return find_mode(&n);
 }
 
 /* find an unsigned mode for a signed integer mode */
-ir_mode *find_signed_mode(const ir_mode *mode) {
+ir_mode *find_signed_mode(const ir_mode *mode)
+{
 	ir_mode n = *mode;
 
 	assert(mode->sort == irms_int_number);
@@ -875,7 +862,8 @@ ir_mode *find_signed_mode(const ir_mode *mode) {
 }
 
 /* finds a integer mode with 2*n bits for an integer mode with n bits. */
-ir_mode *find_double_bits_int_mode(const ir_mode *mode) {
+ir_mode *find_double_bits_int_mode(const ir_mode *mode)
+{
 	ir_mode n = *mode;
 
 	assert(mode->sort == irms_int_number && mode->arithmetic == irma_twos_complement);
@@ -888,7 +876,8 @@ ir_mode *find_double_bits_int_mode(const ir_mode *mode) {
  * Returns non-zero if the given mode honors signed zero's, i.e.,
  * a +0 and a -0 exists and handled differently.
  */
-int mode_honor_signed_zeros(const ir_mode *mode) {
+int mode_honor_signed_zeros(const ir_mode *mode)
+{
 	/* for floating point, we know that IEEE 754 has +0 and -0,
 	 * but always handles it identical.
 	 */
@@ -902,7 +891,8 @@ int mode_honor_signed_zeros(const ir_mode *mode) {
  *
  * This does NOT happen on IEEE 754.
  */
-int mode_overflow_on_unary_Minus(const ir_mode *mode) {
+int mode_overflow_on_unary_Minus(const ir_mode *mode)
+{
 	if (mode->sort == irms_float_number)
 		return mode->arithmetic == irma_ieee754 ? 0 : 1;
 	return 1;
@@ -915,13 +905,41 @@ int mode_overflow_on_unary_Minus(const ir_mode *mode) {
  * This is normally true for integer modes, not for floating
  * point modes.
  */
-int mode_wrap_around(const ir_mode *mode) {
+int mode_wrap_around(const ir_mode *mode)
+{
 	/* FIXME: better would be an extra mode property */
 	return mode_is_int(mode);
 }
 
-void finish_mode(void) {
+/*
+ * Returns non-zero if the cast from mode src to mode dst is a
+ * reinterpret cast (ie. only the bit pattern is reinterpreted,
+ * no conversion is done)
+ */
+int is_reinterpret_cast(const ir_mode *src, const ir_mode *dst)
+{
+	ir_mode_arithmetic ma;
+
+	if (src == dst)
+		return 1;
+	if (get_mode_size_bits(src) != get_mode_size_bits(dst))
+		return 0;
+	ma = get_mode_arithmetic(src);
+	if (ma != get_mode_arithmetic(dst))
+		return 0;
+
+	return ma == irma_twos_complement;
+}
+
+ir_type *(get_type_for_mode) (const ir_mode *mode)
+{
+	return get_type_for_mode_(mode);
+}
+
+void finish_mode(void)
+{
 	obstack_free(&modes, 0);
+	DEL_ARR_F(mode_list);
 
 	mode_T   = NULL;
 	mode_X   = NULL;