X-Git-Url: http://nsz.repo.hu/git/?a=blobdiff_plain;f=ir%2Fir%2Firmode.c;h=d1591e3e5f83cbfef735e8b43f0ae6f6220c0183;hb=9fe9c20a1570729f1bdd21a6f174ec045d2ff986;hp=7b66675504a15977ac68532f55c0c81ec9811b70;hpb=5abc0f407c248ef4e2695ca0a102f9c11b378056;p=libfirm

diff --git a/ir/ir/irmode.c b/ir/ir/irmode.c
index 7b6667550..d1591e3e5 100644
--- a/ir/ir/irmode.c
+++ b/ir/ir/irmode.c
@@ -1,24 +1,31 @@
-/* Copyright (C) 1998 - 2000 by Universitaet Karlsruhe
-** All rights reserved.
-**
-** Authors: Martin Trapp, Christian Schaefer
-**
-*/
-
-/* $Id$ */
-
+/*
+ * Project:     libFIRM
+ * File name:   ir/ir/irmode.c
+ * Purpose:     Data modes of operations.
+ * Author:      Martin Trapp, Christian Schaefer
+ * Modified by: Goetz Lindenmaier, Mathias Heil
+ * Created:
+ * CVS-ID:      $Id$
+ * Copyright:   (c) 1998-2003 Universität Karlsruhe
+ * Licence:     This file protected by GPL -  GNU GENERAL PUBLIC LICENSE.
+ */
 #ifdef HAVE_CONFIG_H
-# include <config.h>
+# include "config.h"
 #endif
 
-# include "irmode_t.h"
-# include "ident.h"
+#ifdef HAVE_STDLIB_H
 # include <stdlib.h>
-# include <stddef.h>
+#endif
+#ifdef HAVE_STRING_H
 # include <string.h>
+#endif
+
+# include <stddef.h>
+
+# include "irmode_t.h"
+# include "ident.h"
 # include "tv.h"
 # include "obst.h"
-# include "misc.h"
 
 #if 0
 static long long count = 0;
@@ -51,13 +58,30 @@ static int num_modes;
 INLINE static 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 && m->size == n->size && m->align == n->align && m->sign == n->sign)
+  if (m->sort         == n->sort &&
+      m->arithmetic   == n->arithmetic &&
+      m->size         == n->size &&
+      m->sign         == n->sign  &&
+      m->modulo_shift == n->modulo_shift &&
+      m->vector_elem  == n->vector_elem)
     return 1;
-//  if (0 == memcmp(&m->sort, &n->sort, offsetof(ir_mode,min) - offsetof(ir_mode,sort))) return 1;
 
   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
@@ -65,21 +89,32 @@ INLINE static int modes_are_equal(const ir_mode *m, const ir_mode *n)
  */
 static ir_mode *find_mode(const ir_mode *m)
 {
-  ir_mode *n;
+  ir_mode *n, *nn;
   struct _obstack_chunk	*p;
 
-  p = modes.chunk;
-  for ( n = (ir_mode *)p->contents; (char *)(n+1) <= modes.next_free; ++n) {
+  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));
     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) {
-    for (n = (ir_mode *)p->contents; (char *)(n+1) < p->limit; ++n)
+    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;
@@ -92,6 +127,7 @@ static void set_mode_values(ir_mode* mode)
 {
   switch (get_mode_sort(mode))
   {
+    case irms_character:
     case irms_int_number:
     case irms_float_number:
       mode->min = get_tarval_min(mode);
@@ -110,11 +146,10 @@ static void set_mode_values(ir_mode* mode)
     case irms_reference:
       mode->min = tarval_bad;
       mode->max = tarval_bad;
-      mode->null = (get_mode_modecode(mode)==irm_P)?tarval_P_void:tarval_bad;
+      mode->null = (get_mode_modecode(mode) == irm_P) ? tarval_P_void : tarval_bad;
       mode->one = tarval_bad;
       break;
 
-    case irms_character:
     case irms_auxiliary:
     case irms_memory:
     case irms_control_flow:
@@ -190,16 +225,20 @@ INLINE ir_mode *get_modeANY(void) { ANNOUNCE(); return mode_ANY; }
 INLINE ir_mode *get_modeBAD(void) { ANNOUNCE(); return mode_BAD; }
 
 
-ir_mode *get_modeP_mach(void)  { ANNOUNCE(); return mode_P_mach; }
-void     set_modeP_mach(ir_mode *p) {
+ir_mode *(get_modeP_mach)(void) {
+  ANNOUNCE();
+  return __get_modeP_mach();
+}
+
+void (set_modeP_mach)(ir_mode *p) {
   ANNOUNCE();
-  assert(mode_is_reference(p));
-  mode_P_mach = p;
- }
+  __set_modeP_mach(p);
+}
 
 /**
- * Registers a new mode if not defined yet, else returns
- * the "equivalent" one.
+ * Registers a new mode.
+ *
+ * @param new_mode  The new mode template.
  */
 static ir_mode *register_mode(const ir_mode* new_mode)
 {
@@ -209,10 +248,10 @@ static ir_mode *register_mode(const ir_mode* new_mode)
   assert(new_mode);
 
   /* copy mode struct to modes array */
-  mode=(ir_mode*) obstack_copy(&modes, new_mode, sizeof(ir_mode));
+  mode = (ir_mode*)obstack_copy(&modes, new_mode, sizeof(ir_mode));
 
   mode->kind = k_ir_mode;
-  if(num_modes>=irm_max) mode->code = num_modes;
+  if (num_modes >= irm_max) mode->code = num_modes;
   num_modes++;
 
   set_mode_values(mode);
@@ -223,19 +262,21 @@ 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 align, int sign, mode_arithmetic arithmetic )
+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 mode_tmpl;
   ir_mode *mode;
 
-  mode_tmpl.name        = new_id_from_str(name);
-  mode_tmpl.sort        = sort;
-  mode_tmpl.size        = bit_size;
-  mode_tmpl.align       = align;
-  mode_tmpl.sign        = sign ? 1 : 0;
-  mode_tmpl.arithmetic  = arithmetic;
-  mode_tmpl.link        = NULL;
-  mode_tmpl.tv_priv     = NULL;
+  mode_tmpl.name         = new_id_from_str(name);
+  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.vector_elem  = 1;
+  mode_tmpl.arithmetic   = arithmetic;
+  mode_tmpl.link         = NULL;
+  mode_tmpl.tv_priv      = NULL;
 
   mode = find_mode(&mode_tmpl);
   if (mode)
@@ -254,12 +295,62 @@ ir_mode *new_ir_mode(const char *name, mode_sort sort, int bit_size, int align,
       return NULL;
 
     case irms_float_number:
-      assert(0 && "not yet implemented");
+    case irms_int_number:
+    case irms_reference:
+    case irms_character:
+      return register_mode(&mode_tmpl);
+  }
+  return NULL; /* to shut up gcc */
+}
+
+/*
+ * 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 mode_tmpl;
+  ir_mode *mode;
+
+  mode_tmpl.name         = new_id_from_str(name);
+  mode_tmpl.sort         = sort;
+  mode_tmpl.size         = bit_size * num_of_elem;
+  mode_tmpl.sign         = sign ? 1 : 0;
+  mode_tmpl.modulo_shift = (mode_tmpl.sort == irms_int_number) ? modulo_shift : 0;
+  mode_tmpl.vector_elem  = num_of_elem;
+  mode_tmpl.arithmetic   = arithmetic;
+  mode_tmpl.link         = NULL;
+  mode_tmpl.tv_priv      = NULL;
+
+  mode = find_mode(&mode_tmpl);
+  if (mode)
+    return mode;
+
+  if (num_of_elem <= 1) {
+    assert(0 && "vector modes should have at least 2 elements");
+    return NULL;
+  }
+
+  /* sanity checks */
+  switch (sort)
+  {
+    case irms_auxiliary:
+    case irms_control_flow:
+    case irms_memory:
+    case irms_internal_boolean:
+      assert(0 && "internal modes cannot be user defined");
       return NULL;
 
-    case irms_int_number:
     case irms_reference:
     case irms_character:
+      assert(0 && "only integer and floating point modes can be vectorized");
+      return NULL;
+
+    case irms_float_number:
+      assert(0 && "not yet implemented");
+      return NULL;
+
+    case irms_int_number:
       return register_mode(&mode_tmpl);
   }
   return NULL; /* to shut up gcc */
@@ -267,77 +358,86 @@ ir_mode *new_ir_mode(const char *name, mode_sort sort, int bit_size, int align,
 
 /* Functions for the direct access to all attributes od a ir_mode */
 modecode
-get_mode_modecode(const ir_mode *mode)
+(get_mode_modecode)(const ir_mode *mode)
 {
   ANNOUNCE();
-  return mode->code;
+  return __get_mode_modecode(mode);
 }
 
 ident *
-get_mode_ident(const ir_mode *mode)
+(get_mode_ident)(const ir_mode *mode)
 {
   ANNOUNCE();
-  return mode->name;
+  return __get_mode_ident(mode);
 }
 
 const char *
 get_mode_name(const ir_mode *mode)
 {
   ANNOUNCE();
-  return id_to_str(mode->name);
+  return get_id_str(mode->name);
 }
 
 mode_sort
-get_mode_sort(const ir_mode* mode)
+(get_mode_sort)(const ir_mode* mode)
 {
   ANNOUNCE();
-  return mode->sort;
+  return __get_mode_sort(mode);
 }
 
-INLINE int
-get_mode_size_bits(const ir_mode *mode)
+int
+(get_mode_size_bits)(const ir_mode *mode)
 {
   ANNOUNCE();
-  return mode->size;
+  return __get_mode_size_bits(mode);
 }
 
-int get_mode_size_bytes(const ir_mode *mode) {
-  int size = get_mode_size_bits(mode);
+int
+(get_mode_size_bytes)(const ir_mode *mode) {
   ANNOUNCE();
-  if ((size & 7) != 0) return -1;
-  return size >> 3;
+  return __get_mode_size_bytes(mode);
 }
 
 int
-get_mode_align (const ir_mode *mode)
+(get_mode_sign)(const ir_mode *mode)
 {
   ANNOUNCE();
-  return mode->align;
+  return __get_mode_sign(mode);
 }
 
 int
-get_mode_sign (const ir_mode *mode)
+(get_mode_arithmetic)(const ir_mode *mode)
 {
   ANNOUNCE();
-  return mode->sign;
+  return get_mode_arithmetic(mode);
 }
 
-int get_mode_arithmetic (const ir_mode *mode)
-{
-  ANNOUNCE();
-  return mode->arithmetic;
+
+/* Attribute modulo shift specifies for modes of kind irms_int_number
+ *  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) {
+  return __get_mode_modulo_shift(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)
 {
   ANNOUNCE();
-  return mode->link;
+  return __get_mode_link(mode);
 }
 
-void set_mode_link(ir_mode *mode, void *l)
+void
+(set_mode_link)(ir_mode *mode, void *l)
 {
-  mode->link=l;
-  return;
+  __set_mode_link(mode, l);
 }
 
 tarval *
@@ -408,156 +508,99 @@ get_mode_NAN(ir_mode *mode)
 
 int
 is_mode (void *thing) {
-  assert(thing);
   if (get_kind(thing) == k_ir_mode)
     return 1;
   else
     return 0;
 }
 
-/* Functions to check, whether a modecode is signed, float, int, num, data,
-   datab or dataM. For more exact definitions read the corresponding pages
-   in the firm documentation or the followingenumeration
-
-   The set of "float" is defined as:
-   ---------------------------------
-   float = {irm_F, irm_D, irm_E}
-
-   The set of "int" is defined as:
-   -------------------------------
-   int   = {irm_Bs, irm_Bu, irm_Hs, irm_Hu, irm_Is, irm_Iu, irm_Ls, irm_Lu}
-
-   The set of "num" is defined as:
-   -------------------------------
-   num   = {irm_F, irm_D, irm_E, irm_Bs, irm_Bu, irm_Hs, irm_Hu,
-            irm_Is, irm_Iu, irm_Ls, irm_Lu}
-            = {float || int}
-
-   The set of "data" is defined as:
-   -------------------------------
-   data  = {irm_F, irm_D, irm_E irm_Bs, irm_Bu, irm_Hs, irm_Hu,
-            irm_Is, irm_Iu, irm_Ls, irm_Lu, irm_C, irm_U, irm_P}
-            = {num || irm_C || irm_U || irm_P}
-
-   The set of "datab" is defined as:
-   ---------------------------------
-   datab = {irm_F, irm_D, irm_E, irm_Bs, irm_Bu, irm_Hs, irm_Hu,
-            irm_Is, irm_Iu, irm_Ls, irm_Lu, irm_C, irm_U, irm_P, irm_b}
-            = {data || irm_b }
-
-   The set of "dataM" is defined as:
-   ---------------------------------
-   dataM = {irm_F, irm_D, irm_E, irm_Bs, irm_Bu, irm_Hs, irm_Hu,
-            irm_Is, irm_Iu, irm_Ls, irm_Lu, irm_C, irm_U, irm_P, irm_M}
-            = {data || irm_M}
-*/
-
-#ifdef MODE_ACCESS_DEFINES
-#  undef mode_is_signed
-#  undef mode_is_float
-#  undef mode_is_int
-#  undef mode_is_num
-#  undef mode_is_numP
-#  undef mode_is_data
-#  undef mode_is_datab
-#  undef mode_is_dataM
-#endif
 int
-mode_is_signed (const ir_mode *mode)
-{
+(mode_is_signed)(const ir_mode *mode) {
   ANNOUNCE();
-  assert(mode);
-  return mode->sign;
+  return __mode_is_signed(mode);
 }
 
 int
-mode_is_float (const ir_mode *mode)
-{
+(mode_is_float)(const ir_mode *mode) {
   ANNOUNCE();
-  assert(mode);
-  return (get_mode_sort(mode) == irms_float_number);
+  return __mode_is_float(mode);
 }
 
 int
-mode_is_int (const ir_mode *mode)
-{
+(mode_is_int)(const ir_mode *mode) {
   ANNOUNCE();
-  assert(mode);
-  return (get_mode_sort(mode) == irms_int_number);
+  return __mode_is_int(mode);
 }
 
-int mode_is_character (const ir_mode *mode)
-{
+int
+(mode_is_character)(const ir_mode *mode) {
   ANNOUNCE();
-  assert(mode);
-  return (get_mode_sort(mode) == irms_character);
+  return __mode_is_character(mode);
 }
 
-int mode_is_reference (const ir_mode *mode)
-{
+int
+(mode_is_reference)(const ir_mode *mode) {
   ANNOUNCE();
-  assert(mode);
-  return (get_mode_sort(mode) == irms_reference);
+  return __mode_is_reference(mode);
 }
 
 int
-mode_is_num (const ir_mode *mode)
-{
+(mode_is_num)(const ir_mode *mode) {
   ANNOUNCE();
-  assert(mode);
-  return (mode_is_int(mode) || mode_is_float(mode));
+  return __mode_is_num(mode);
 }
 
 int
-mode_is_numP (const ir_mode *mode)
-{
+(mode_is_numP)(const ir_mode *mode) {
   ANNOUNCE();
-  assert(mode);
-  return (mode_is_int(mode) || mode_is_float(mode) || mode_is_reference(mode));
+  return __mode_is_numP(mode);
 }
 
 int
-mode_is_data (const ir_mode *mode)
-{
+(mode_is_data)(const ir_mode *mode) {
   ANNOUNCE();
-  assert(mode);
-  return (mode_is_num(mode) || get_mode_sort(mode) == irms_character || get_mode_sort(mode) == irms_reference);
+  return __mode_is_data(mode);
 }
 
 int
-mode_is_datab (const ir_mode *mode)
-{
+(mode_is_datab)(const ir_mode *mode) {
   ANNOUNCE();
-  assert(mode);
-  return (mode_is_data(mode) || get_mode_sort(mode) == irms_internal_boolean);
+  return __mode_is_datab(mode);
 }
 
 int
-mode_is_dataM (const ir_mode *mode)
-{
+(mode_is_dataM)(const ir_mode *mode) {
   ANNOUNCE();
-  assert(mode);
-  return (mode_is_data(mode) || get_mode_modecode(mode) == irm_M);
-}
-#ifdef MODE_ACCESS_DEFINES
-#  define mode_is_signed(mode) (mode)->sign
-#  define mode_is_float(mode) ((mode)->sort == irms_float_number)
-#  define mode_is_int(mode) ((mode)->sort == irms_int_number)
-#  define mode_is_num(mode) (((mode)->sort == irms_float_number) || ((mode)->sort == irms_int_number))
-#  define mode_is_data(mode) (((mode)->sort == irms_float_number) || ((mode)->sort == irms_int_number) || ((mode)->sort == irms_character) || ((mode)->sort == irms_reference))
-#  define mode_is_datab(mode) (((mode)->sort == irms_float_number) || ((mode)->sort == irms_int_number) || ((mode)->sort == irms_character) || ((mode)->sort == irms_reference) || ((mode)->sort == irms_internal_boolean))
-#  define mode_is_dataM(mode) (((mode)->sort == irms_float_number) || ((mode)->sort == irms_int_number) || ((mode)->sort == irms_character) || ((mode)->sort == irms_reference) || ((mode)->code == irm_M))
-#endif
+  return __mode_is_dataM(mode);
+}
+
+int
+(mode_is_float_vector)(const ir_mode *mode) {
+  ANNOUNCE();
+  return __mode_is_float_vector(mode);
+}
+
+int
+(mode_is_int_vector)(const ir_mode *mode) {
+  ANNOUNCE();
+  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 sm_bits, lm_bits;
+
   ANNOUNCE();
   assert(sm);
   assert(lm);
 
   if (sm == lm) return 1;
 
+  sm_bits = get_mode_size_bits(sm);
+  lm_bits = get_mode_size_bits(lm);
+
   switch(get_mode_sort(sm))
   {
     case irms_int_number:
@@ -568,18 +611,23 @@ smaller_mode(const ir_mode *sm, const ir_mode *lm)
            *   - both have the same sign and lm is the larger one
            *   - lm is the signed one and is at least two bits larger
            *     (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 (   get_mode_arithmetic(sm) == get_mode_arithmetic(lm)
+	      && get_mode_arithmetic(sm) == irma_twos_complement) {
+	    return lm_bits >= sm_bits;
+	  }
+          else if (mode_is_signed(sm))
           {
-            if ( mode_is_signed(lm) && (get_mode_size_bits(lm) > get_mode_size_bits(sm)) )
+            if ( mode_is_signed(lm) && (lm_bits >= sm_bits) )
               return 1;
           }
           else if (mode_is_signed(lm))
           {
-            if (get_mode_size_bits(lm) > get_mode_size_bits(sm) + 1)
+            if (lm_bits > sm_bits + 1)
               return 1;
           }
-          else if (get_mode_size_bits(lm) > get_mode_size_bits(sm))
+          else if (lm_bits >= sm_bits)
           {
             return 1;
           }
@@ -595,11 +643,11 @@ smaller_mode(const ir_mode *sm, const ir_mode *lm)
       break;
 
     case irms_float_number:
-      /* XXX currently only the three standard 32,64,80 bit floats
-       * are supported which can safely be converted */
-      if ( (get_mode_sort(lm) == irms_float_number)
-           && (get_mode_size_bits(lm) > get_mode_size_bits(sm)) )
-         return 1;
+      if (get_mode_arithmetic(sm) == get_mode_arithmetic(lm)) {
+        if ( (get_mode_sort(lm) == irms_float_number)
+           && (get_mode_size_bits(lm) >= get_mode_size_bits(sm)) )
+          return 1;
+      }
       break;
 
     case irms_reference:
@@ -614,7 +662,7 @@ smaller_mode(const ir_mode *sm, const ir_mode *lm)
   return 0;
 }
 
-/* ** initialization ** */
+/* initialization, build the default modes */
 void
 init_mode (void)
 {
@@ -628,24 +676,25 @@ init_mode (void)
   /* initialize predefined modes */
 
   /* Internal Modes */
-  newmode.arithmetic = irma_none;
-  newmode.size    = 0;
-  newmode.align   = 0;
-  newmode.sign    = 0;
-  newmode.link    = NULL;
-  newmode.tv_priv = NULL;
+  newmode.arithmetic   = irma_none;
+  newmode.size         = 0;
+  newmode.sign         = 0;
+  newmode.modulo_shift = 0;
+  newmode.vector_elem  = 0;
+  newmode.link         = NULL;
+  newmode.tv_priv      = NULL;
 
   /* Control Flow Modes*/
   newmode.sort    = irms_control_flow;
 
   /* Basic Block */
-  newmode.name    = id_from_str("BB", 2);
+  newmode.name    = new_id_from_chars("BB", 2);
   newmode.code    = irm_BB;
 
   mode_BB = register_mode(&newmode);
 
 /* eXecution */
-  newmode.name    = id_from_str("X", 1);
+  newmode.name    = new_id_from_chars("X", 1);
   newmode.code    = irm_X;
 
   mode_X = register_mode(&newmode);
@@ -654,7 +703,7 @@ init_mode (void)
   newmode.sort    = irms_memory;
 
   /* Memory */
-  newmode.name    = id_from_str("M", 1);
+  newmode.name    = new_id_from_chars("M", 1);
   newmode.code    = irm_M;
 
   mode_M = register_mode(&newmode);
@@ -663,19 +712,19 @@ init_mode (void)
   newmode.sort    = irms_auxiliary,
 
   /* Tuple */
-  newmode.name    = id_from_str("T", 1);
+  newmode.name    = new_id_from_chars("T", 1);
   newmode.code    = irm_T;
 
   mode_T = register_mode(&newmode);
 
   /* ANY */
-  newmode.name    = id_from_str("ANY", 3);
+  newmode.name    = new_id_from_chars("ANY", 3);
   newmode.code    = irm_ANY;
 
   mode_ANY = register_mode(&newmode);
 
   /* BAD */
-  newmode.name    = id_from_str("BAD", 3);
+  newmode.name    = new_id_from_chars("BAD", 3);
   newmode.code    = irm_BAD;
 
   mode_BAD = register_mode(&newmode);
@@ -684,140 +733,138 @@ init_mode (void)
   newmode.sort    = irms_internal_boolean;
 
   /* boolean */
-  newmode.name    = id_from_str("b", 1);
+  newmode.name    = new_id_from_chars("b", 1);
   newmode.code    = irm_b;
 
   mode_b = register_mode(&newmode);
 
 /* Data Modes */
+  newmode.vector_elem = 1;
 
   /* Float Number Modes */
-  newmode.sort    = irms_float_number;
+  newmode.sort       = irms_float_number;
   newmode.arithmetic = irma_ieee754;
 
   /* float */
-  newmode.name    = id_from_str("F", 1);
+  newmode.name    = new_id_from_chars("F", 1);
   newmode.code    = irm_F;
   newmode.sign    = 1;
-  newmode.align   = 4;
   newmode.size    = 32;
 
   mode_F = register_mode(&newmode);
 
   /* double */
-  newmode.name    = id_from_str("D", 1);
+  newmode.name    = new_id_from_chars("D", 1);
   newmode.code    = irm_D;
   newmode.sign    = 1;
-  newmode.align   = 4;
   newmode.size    = 64;
 
   mode_D = register_mode(&newmode);
 
   /* extended */
-  newmode.name    = id_from_str("E", 1);
+  newmode.name    = new_id_from_chars("E", 1);
   newmode.code    = irm_E;
   newmode.sign    = 1;
-  newmode.align   = 4;
   newmode.size    = 80;
 
   mode_E = register_mode(&newmode);
 
   /* Integer Number Modes */
-  newmode.sort    = irms_int_number;
-  newmode.arithmetic = irma_twos_complement;
+  newmode.sort         = irms_int_number;
+  newmode.arithmetic   = irma_twos_complement;
 
   /* signed byte */
-  newmode.name    = id_from_str("Bs", 2);
-  newmode.code    = irm_Bs;
-  newmode.sign    = 1;
-  newmode.align   = 1;
-  newmode.size    = 8;
+  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);
 
   /* unsigned byte */
-  newmode.name    = id_from_str("Bu", 2);
-  newmode.code    = irm_Bu;
-  newmode.arithmetic = irma_twos_complement;
-  newmode.sign    = 0;
-  newmode.align   = 1;
-  newmode.size    = 8;
+  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);
 
   /* signed short integer */
-  newmode.name    = id_from_str("Hs", 2);
-  newmode.code    = irm_Hs;
-  newmode.sign    = 1;
-  newmode.align   = 2;
-  newmode.size    = 16;
+  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);
 
   /* unsigned short integer */
-  newmode.name    = id_from_str("Hu", 2);
-  newmode.code    = irm_Hu;
-  newmode.sign    = 0;
-  newmode.align   = 2;
-  newmode.size    = 16;
+  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);
 
   /* signed integer */
-  newmode.name    = id_from_str("Is", 2);
-  newmode.code    = irm_Is;
-  newmode.sign    = 1;
-  newmode.align   = 4;
-  newmode.size    = 32;
+  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);
 
   /* unsigned integer */
-  newmode.name    = id_from_str("Iu", 2);
-  newmode.code    = irm_Iu;
-  newmode.sign    = 0;
-  newmode.align   = 4;
-  newmode.size    = 32;
+  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);
 
   /* signed long integer */
-  newmode.name    = id_from_str("Ls", 2);
-  newmode.code    = irm_Ls;
-  newmode.sign    = 1;
-  newmode.align   = 4;
-  newmode.size    = 64;
+  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);
 
   /* unsigned long integer */
-  newmode.name    = id_from_str("Lu", 2);
-  newmode.code    = irm_Lu;
-  newmode.sign    = 0;
-  newmode.align   = 4;
-  newmode.size    = 64;
+  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);
 
   /* Character Modes */
-  newmode.sort    = irms_character;
-  newmode.arithmetic = irma_none;
+  newmode.sort         = irms_character;
+  newmode.arithmetic   = irma_none;
 
   /* Character */
-  newmode.name    = id_from_str("C", 1);
-  newmode.code    = irm_C;
-  newmode.sign    = 0;
-  newmode.align   = 1;
-  newmode.size    = 8;
+  newmode.name         = new_id_from_chars("C", 1);
+  newmode.code         = irm_C;
+  newmode.sign         = 0;
+  newmode.size         = 8;
+  newmode.modulo_shift = 32;
 
   mode_C = register_mode(&newmode);
 
   /* Unicode character */
-  newmode.name    = id_from_str("U", 1);
-  newmode.code    = irm_U;
-  newmode.sign    = 0;
-  newmode.align   = 2;
-  newmode.size    = 16;
+  newmode.name         = new_id_from_chars("U", 1);
+  newmode.code         = irm_U;
+  newmode.sign         = 0;
+  newmode.size         = 16;
+  newmode.modulo_shift = 32;
 
   mode_U = register_mode(&newmode);
 
@@ -826,14 +873,73 @@ init_mode (void)
   newmode.arithmetic = irma_twos_complement;
 
   /* pointer */
-  newmode.name    = id_from_str("P", 1);
-  newmode.code    = irm_P;
-  newmode.sign    = 0;
-  newmode.align   = 4;
-  newmode.size    = 32;
+  newmode.name         = new_id_from_chars("P", 1);
+  newmode.code         = irm_P;
+  newmode.sign         = 0;
+  newmode.size         = 32;
+  newmode.modulo_shift = 0;
 
   mode_P = register_mode(&newmode);
 
   /* set the machine specific modes to the predifined ones */
   mode_P_mach = mode_P;
 }
+
+/* find a signed mode for an unsigned integer mode */
+ir_mode *find_unsigned_mode(const ir_mode *mode) {
+  ir_mode n = *mode;
+
+  if (mode->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 n = *mode;
+
+  assert(mode->sort == irms_int_number);
+  n.sign = 1;
+  return find_mode(&n);
+}
+
+/* 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 n = *mode;
+
+  assert(mode->sort == irms_int_number && mode->arithmetic == irma_twos_complement);
+
+  n.size = 2*mode->size;
+  return find_mode(&n);
+}
+
+void finish_mode(void) {
+  obstack_free(&modes, 0);
+
+  mode_T = NULL;
+  mode_X = NULL;
+  mode_M = NULL;
+  mode_BB = NULL;
+  mode_ANY = NULL;
+  mode_BAD = NULL;
+
+  mode_F = NULL;
+  mode_D = NULL;
+  mode_E = NULL;
+
+  mode_Bs = NULL;
+  mode_Bu = NULL;
+  mode_Hs = NULL;
+  mode_Hu = NULL;
+  mode_Is = NULL;
+  mode_Iu = NULL;
+  mode_Ls = NULL;
+  mode_Lu = NULL;
+
+  mode_C = NULL;
+  mode_U = NULL;
+  mode_b = NULL;
+  mode_P = NULL;
+
+  mode_P_mach = NULL;
+}