X-Git-Url: http://nsz.repo.hu/git/?a=blobdiff_plain;f=ir%2Fir%2Firmode.c;h=96c00291d0755a7efbda075aff60733185305c40;hb=ecf4d3aa8c62642835511e1f7b8a329078161fe1;hp=f16d7a869ec1ebdb20f9f719197116b8edabb06c;hpb=d743c7ac94ab7d3f964b075ea2bb9f6c25ec4d52;p=libfirm

diff --git a/ir/ir/irmode.c b/ir/ir/irmode.c
index f16d7a869..96c00291d 100644
--- a/ir/ir/irmode.c
+++ b/ir/ir/irmode.c
@@ -1,573 +1,1004 @@
-/* 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 <malloc.h>
-# include <stddef.h>
+#ifdef HAVE_STDLIB_H
+# include <stdlib.h>
+#endif
+#ifdef HAVE_STRING_H
 # include <string.h>
-# include "tv.h"
+#endif
+
+# include <stddef.h>
+
+# include "irmode_t.h"
+# include "ident.h"
+# include "tv_t.h"
+# include "obst.h"
+# include "irhooks.h"
+
+#if 0
+static long long count = 0;
+#  define ANNOUNCE() printf(__FILE__": call no. %lld (%s)\n", count++, __FUNCTION__)
+#else
+#  define ANNOUNCE() ((void)0)
+#endif
+
+/* * *
+ * local values
+ * * */
+
+
+/** dynamic array to hold all modes */
+static struct obstack modes;
+
+/** number of defined modes */
+static int num_modes;
+
+/* * *
+ * local functions
+ * * */
 
+/**
+ * Compare modes that don't need to have their code field
+ * correctly set
+ *
+ * TODO: Add other fields
+ **/
+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->sign         == n->sign  &&
+      m->modulo_shift == n->modulo_shift &&
+      m->vector_elem  == n->vector_elem)
+    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
+ * 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));
+    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)
+{
+  switch (get_mode_sort(mode))
+  {
+    case irms_character:
+    case irms_int_number:
+    case irms_float_number:
+      mode->min  = get_tarval_min(mode);
+      mode->max  = get_tarval_max(mode);
+      mode->null = get_tarval_null(mode);
+      mode->one  = get_tarval_one(mode);
+      mode->minus_one = get_tarval_minus_one(mode);
+      break;
+
+    case irms_internal_boolean:
+      mode->min  = tarval_b_false;
+      mode->max  = tarval_b_true;
+      mode->null = tarval_b_false;
+      mode->one  = tarval_b_true;
+      mode->minus_one = tarval_bad;
+      break;
+
+    case irms_reference:
+      mode->min  = tarval_bad;
+      mode->max  = tarval_bad;
+      mode->null = get_tarval_null(mode);
+      mode->one  = tarval_bad;
+      mode->minus_one = tarval_bad;
+      break;
+
+    case irms_auxiliary:
+    case irms_memory:
+    case irms_control_flow:
+      mode->min  = tarval_bad;
+      mode->max  = tarval_bad;
+      mode->null = tarval_bad;
+      mode->one  = tarval_bad;
+      mode->minus_one = tarval_bad;
+      break;
+  }
+}
+
+/* * *
+ * globals defined in irmode.h
+ * * */
+
+/* --- Predefined modes --- */
+
+/* FIRM internal modes: */
 ir_mode *mode_T;
-ir_mode *mode_F;
-ir_mode *mode_D;
-ir_mode *mode_E;
-ir_mode *mode_Bs;
-ir_mode *mode_Bu;
-ir_mode *mode_Hs;
+ir_mode *mode_X;
+ir_mode *mode_M;
+ir_mode *mode_BB;
+ir_mode *mode_ANY;
+ir_mode *mode_BAD;
+
+/* predefined numerical modes: */
+ir_mode *mode_F;    /* float */
+ir_mode *mode_D;    /* double */
+ir_mode *mode_E;    /* long double */
+
+ir_mode *mode_Bs;   /* integral values, signed and unsigned */
+ir_mode *mode_Bu;   /* 8 bit */
+ir_mode *mode_Hs;   /* 16 bit */
 ir_mode *mode_Hu;
-ir_mode *mode_Is;
+ir_mode *mode_Is;   /* 32 bit */
 ir_mode *mode_Iu;
-ir_mode *mode_Ls;
+ir_mode *mode_Ls;   /* 64 bit */
 ir_mode *mode_Lu;
+
 ir_mode *mode_C;
 ir_mode *mode_U;
 ir_mode *mode_b;
 ir_mode *mode_P;
-ir_mode *mode_X;
-ir_mode *mode_M;
-ir_mode *mode_BB;
-
-INLINE ir_mode *get_modeT() { return mode_T; }
-INLINE ir_mode *get_modeF() { return mode_F; }
-INLINE ir_mode *get_modeD() { return mode_D; }
-INLINE ir_mode *get_modeE() { return mode_E; }
-INLINE ir_mode *get_modeBs() { return mode_Bs; }
-INLINE ir_mode *get_modeBu() { return mode_Bu; }
-INLINE ir_mode *get_modeHs() { return mode_Hs; }
-INLINE ir_mode *get_modeHu() { return mode_Hu; }
-INLINE ir_mode *get_modeIs() { return mode_Is; }
-INLINE ir_mode *get_modeIu() { return mode_Iu; }
-INLINE ir_mode *get_modeLs() { return mode_Ls; }
-INLINE ir_mode *get_modeLu() { return mode_Lu; }
-INLINE ir_mode *get_modeC() { return mode_C; }
-INLINE ir_mode *get_modeU() { return mode_U; }
-INLINE ir_mode *get_modeb() { return mode_b; }
-INLINE ir_mode *get_modeP() { return mode_P; }
-INLINE ir_mode *get_modeX() { return mode_X; }
-INLINE ir_mode *get_modeM() { return mode_M; }
-INLINE ir_mode *get_modeBB() { return mode_BB; }
 
-void
-init_mode (void)
-{
-  /* allocate all modes. We need to memset them as tarval_vrfy
-     reads fields before they are initialized: It compares to
-     min/max when tarvals for min/max are allocated!  */
-  mode_T  = (ir_mode *) malloc (sizeof (ir_mode)); memset(mode_T, 0, sizeof(ir_mode));
-  mode_F  = (ir_mode *) malloc (sizeof (ir_mode)); memset(mode_F, 0, sizeof(ir_mode));
-  mode_D  = (ir_mode *) malloc (sizeof (ir_mode)); memset(mode_D, 0, sizeof(ir_mode));
-  mode_E  = (ir_mode *) malloc (sizeof (ir_mode)); memset(mode_E, 0, sizeof(ir_mode));
-  mode_Bs = (ir_mode *) malloc (sizeof (ir_mode)); memset(mode_Bs, 0, sizeof(ir_mode));
-  mode_Bu = (ir_mode *) malloc (sizeof (ir_mode)); memset(mode_Bu, 0, sizeof(ir_mode));
-  mode_Hs = (ir_mode *) malloc (sizeof (ir_mode)); memset(mode_Hs, 0, sizeof(ir_mode));
-  mode_Hu = (ir_mode *) malloc (sizeof (ir_mode)); memset(mode_Hu, 0, sizeof(ir_mode));
-  mode_Is = (ir_mode *) malloc (sizeof (ir_mode)); memset(mode_Is, 0, sizeof(ir_mode));
-  mode_Iu = (ir_mode *) malloc (sizeof (ir_mode)); memset(mode_Iu, 0, sizeof(ir_mode));
-  mode_Ls = (ir_mode *) malloc (sizeof (ir_mode)); memset(mode_Ls, 0, sizeof(ir_mode));
-  mode_Lu = (ir_mode *) malloc (sizeof (ir_mode)); memset(mode_Lu, 0, sizeof(ir_mode));
-  mode_C  = (ir_mode *) malloc (sizeof (ir_mode)); memset(mode_C, 0, sizeof(ir_mode));
-  mode_U  = (ir_mode *) malloc (sizeof (ir_mode)); memset(mode_U, 0, sizeof(ir_mode));
-  mode_b  = (ir_mode *) malloc (sizeof (ir_mode)); memset(mode_b, 0, sizeof(ir_mode));
-  mode_P  = (ir_mode *) malloc (sizeof (ir_mode)); memset(mode_P, 0, sizeof(ir_mode));
-  mode_X  = (ir_mode *) malloc (sizeof (ir_mode)); memset(mode_X, 0, sizeof(ir_mode));
-  mode_M  = (ir_mode *) malloc (sizeof (ir_mode)); memset(mode_M, 0, sizeof(ir_mode));
-  mode_BB = (ir_mode *) malloc (sizeof (ir_mode)); memset(mode_BB, 0, sizeof(ir_mode));
-
-  mode_T->code = irm_T;
-  mode_F->code = irm_F;
-  mode_D->code = irm_D;
-  mode_E->code = irm_E;
-  mode_Bs->code = irm_Bs;
-  mode_Bu->code = irm_Bu;
-  mode_Hs->code = irm_Hs;
-  mode_Hu->code = irm_Hu;
-  mode_Is->code = irm_Is;
-  mode_Iu->code = irm_Iu;
-  mode_Ls->code = irm_Ls;
-  mode_Lu->code = irm_Lu;
-  mode_C->code = irm_C;
-  mode_U->code = irm_U;
-  mode_b->code = irm_b;
-  mode_P->code = irm_P;
-  mode_X->code = irm_X;
-  mode_M->code = irm_M;
-  mode_BB->code = irm_BB;
-
-  /* initialize all modes */
-
-  mode_T->name = id_from_str ("T", 1);
-  mode_T->fsigned = 0;
-  mode_T->ffloat = 0;
-
-  /* float */
-  mode_F->name = id_from_str ("F", 1);
-  mode_F->fsigned = 1;
-  mode_F->ffloat = 1;
-  mode_F->ld_align = 4;
-  mode_F->size = 4;
-
-  /* double */
-  mode_D->name = id_from_str ("D", 1);
-  mode_D->fsigned = 1;
-  mode_D->ffloat = 1;
-  mode_D->ld_align = 4;
-  mode_D->size = 8;
-
-  /* extended */
-  mode_E->name = id_from_str ("E", 1);
-  mode_E->fsigned = 1;
-  mode_E->ffloat = 1;
-  mode_E->ld_align = 4;
-  mode_E->size = 12;
+/* machine specific modes */
+ir_mode *mode_P_mach;	/* machine specific pointer mode */
+
+/* * *
+ * functions defined in irmode.h
+ * * */
+
+/* JNI access functions */
+INLINE ir_mode *get_modeT(void) { ANNOUNCE(); return mode_T; }
+INLINE ir_mode *get_modeF(void) { ANNOUNCE(); return mode_F; }
+INLINE ir_mode *get_modeD(void) { ANNOUNCE(); return mode_D; }
+INLINE ir_mode *get_modeE(void) { ANNOUNCE(); return mode_E; }
+INLINE ir_mode *get_modeBs(void) { ANNOUNCE(); return mode_Bs; }
+INLINE ir_mode *get_modeBu(void) { ANNOUNCE(); return mode_Bu; }
+INLINE ir_mode *get_modeHs(void) { ANNOUNCE(); return mode_Hs; }
+INLINE ir_mode *get_modeHu(void) { ANNOUNCE(); return mode_Hu; }
+INLINE ir_mode *get_modeIs(void) { ANNOUNCE(); return mode_Is; }
+INLINE ir_mode *get_modeIu(void) { ANNOUNCE(); return mode_Iu; }
+INLINE ir_mode *get_modeLs(void) { ANNOUNCE(); return mode_Ls; }
+INLINE ir_mode *get_modeLu(void) { ANNOUNCE(); return mode_Lu; }
+INLINE ir_mode *get_modeC(void) { ANNOUNCE(); return mode_C; }
+INLINE ir_mode *get_modeU(void) { ANNOUNCE(); return mode_U; }
+INLINE ir_mode *get_modeb(void) { ANNOUNCE(); return mode_b; }
+INLINE ir_mode *get_modeP(void) { ANNOUNCE(); return mode_P; }
+INLINE ir_mode *get_modeX(void) { ANNOUNCE(); return mode_X; }
+INLINE ir_mode *get_modeM(void) { ANNOUNCE(); return mode_M; }
+INLINE ir_mode *get_modeBB(void) { ANNOUNCE(); return mode_BB; }
+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 _get_modeP_mach();
+}
 
-  /* signed byte */
-  mode_Bs->name = id_from_str ("Bs", 1);
-  mode_Bs->fsigned = 1;
-  mode_Bs->ffloat = 0;
-  mode_Bs->ld_align = 1;
-  mode_Bs->size = 1;
-  mode_Bs->min = tarval_from_long (mode_Ls, 0xffffff80);
-  mode_Bs->max = tarval_from_long (mode_Ls, 0x0000007f);
-  mode_Bs->null = tarval_from_long (mode_Bs, 0);
+void (set_modeP_mach)(ir_mode *p) {
+  ANNOUNCE();
+  _set_modeP_mach(p);
+}
 
-  /* unsigned byte */
-  mode_Bu->name = id_from_str ("Bu", 1);
-  mode_Bu->fsigned = 0;
-  mode_Bu->ffloat = 0;
-  mode_Bu->ld_align = 1;
-  mode_Bu->size = 1;
-  mode_Bu->min = tarval_from_long (mode_Lu, 0x00000000);
-  mode_Bu->max = tarval_from_long (mode_Lu, 0x000000ff);
-  mode_Bu->null = tarval_from_long (mode_Bu, 0);
+/**
+ * Registers a new mode.
+ *
+ * @param new_mode  The new mode template.
+ */
+static ir_mode *register_mode(const ir_mode *new_mode)
+{
+  ir_mode *mode = NULL;
 
-  /* signed short integer */
-  mode_Hs->name = id_from_str ("Hs", 1);
-  mode_Hs->fsigned = 1;
-  mode_Hs->ffloat = 0;
-  mode_Hs->ld_align = 2;
-  mode_Hs->size = 2;
-  mode_Hs->min = tarval_from_long (mode_Ls, 0xffff8000);
-  mode_Hs->max = tarval_from_long (mode_Ls, 0x00007fff);
-  mode_Hs->null = tarval_from_long (mode_Hs, 0);
+  ANNOUNCE();
+  assert(new_mode);
 
-  /* unsigned short integer */
-  mode_Hu->name = id_from_str ("Hu", 1);
-  mode_Hu->fsigned = 0;
-  mode_Hu->ffloat = 0;
-  mode_Hu->ld_align = 2;
-  mode_Hu->size = 2;
-  mode_Hu->min = tarval_from_long (mode_Lu, 0x00000000);
-  mode_Hu->max = tarval_from_long (mode_Lu, 0x0000ffff);
-  mode_Hu->null = tarval_from_long (mode_Hu, 0);
+  /* copy mode struct to modes array */
+  mode = (ir_mode *)obstack_copy(&modes, new_mode, sizeof(*mode));
 
-  /* signed integer */
-  mode_Is->name = id_from_str ("Is", 1);
-  mode_Is->fsigned = 1;
-  mode_Is->ffloat = 0;
-  mode_Is->ld_align = 4;
-  mode_Is->size = 4;
-  mode_Is->min = tarval_from_long (mode_Ls, 0x80000000);
-  mode_Is->max = tarval_from_long (mode_Ls, 0x7fffffff);
-  mode_Is->null = tarval_from_long (mode_Is, 0);
+  mode->kind = k_ir_mode;
+  if (num_modes >= irm_max) mode->code = num_modes;
+  num_modes++;
 
-  /* unsigned integer */
-  mode_Iu->name = id_from_str ("Iu", 1);
-  mode_Iu->fsigned = 0;
-  mode_Iu->ffloat = 0;
-  mode_Iu->ld_align = 4;
-  mode_Iu->size = 4;
-  mode_Iu->min = tarval_from_long (mode_Lu, 0x00000000);
-  mode_Iu->max = tarval_from_long (mode_Lu, 0xffffffff);
-  mode_Iu->null = tarval_from_long (mode_Iu, 0);
+  set_mode_values(mode);
 
-  /* signed long integer */
-  mode_Ls->name = id_from_str ("Ls", 1);
-  mode_Ls->fsigned = 1;
-  mode_Ls->ffloat = 0;
-  mode_Ls->ld_align = 8;
-  mode_Ls->size = 8;
-  mode_Ls->min = tarval_from_long (mode_Ls, 0x80000000);
-  mode_Ls->max = tarval_from_long (mode_Ls, 0x7fffffff);
-  mode_Ls->null = tarval_from_long (mode_Ls, 0);
+  return mode;
+}
 
-  /* unsigned long integer */
-  mode_Lu->name = id_from_str ("Lu", 1);
-  mode_Lu->fsigned = 0;
-  mode_Lu->ffloat = 0;
-  mode_Lu->ld_align = 8;
-  mode_Lu->size = 8;
-  mode_Lu->min = tarval_from_long (mode_Lu, 0x00000000);
-  mode_Lu->max = tarval_from_long (mode_Lu, 0xffffffff);
-  mode_Lu->null = tarval_from_long (mode_Lu, 0);
-
-  /* character */
-  mode_C->name = id_from_str ("C", 1);
-  mode_C->fsigned = 0;
-  mode_C->ffloat = 0;
-  mode_C->ld_align = 1;
-  mode_C->size = 1;
-  mode_C->min = tarval_from_long (mode_Ls, 0xffffff80);
-  mode_C->max = tarval_from_long (mode_Ls, 0x0000007f);
-  mode_C->null = tarval_from_long (mode_C, 0);
-
-  /* unicode character */
-  mode_C->name = id_from_str ("U", 1);
-  mode_C->fsigned = 0;
-  mode_C->ffloat = 0;
-  mode_C->ld_align = 1;
-  mode_C->size = 2;
-  mode_C->min = tarval_from_long (mode_Ls, 0xffff8000);
-  mode_C->max = tarval_from_long (mode_Ls, 0x00007fff);
-  mode_C->null = tarval_from_long (mode_U, 0);
+/*
+ * 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 mode_tmpl;
+  ir_mode *mode = 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) {
+    hook_new_mode(&mode_tmpl, mode);
+    return mode;
+  }
 
-  /* boolean */
-  mode_b->name = id_from_str ("b", 1);
-  mode_b->fsigned = 0;
-  mode_b->ffloat = 0;
+  /* 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");
+      break;
+
+    case irms_float_number:
+    case irms_int_number:
+    case irms_reference:
+    case irms_character:
+      mode = register_mode(&mode_tmpl);
+  }
+  hook_new_mode(&mode_tmpl, mode);
+  return mode;
+}
 
-  /* pointer */
-  mode_P->name = id_from_str ("P", 1);
-  mode_P->fsigned = 0;
-  mode_P->ffloat = 0;
-  mode_P->ld_align = 4;
-  mode_P->size = 4;
-  mode_P->min = tarval_from_long (mode_Lu, 0x00000000);
-  mode_P->max = tarval_from_long (mode_Lu, 0xffffffff);
-  mode_P->null = tarval_from_long (mode_P, 0);
-
-  /* Execution */
-  mode_X->name = id_from_str ("X", 1);
-  mode_X->fsigned = 0;
-  mode_X->ffloat = 0;
+/*
+ * 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 = NULL;
+
+  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) {
+    hook_new_mode(&mode_tmpl, mode);
+    return mode;
+  }
 
-  /* Memory */
-  mode_M->name = id_from_str ("M", 1);
-  mode_M->fsigned = 0;
-  mode_M->ffloat = 0;
+  if (num_of_elem <= 1) {
+    assert(0 && "vector modes should have at least 2 elements");
+    hook_new_mode(&mode_tmpl, mode);
+    return mode;
+  }
 
-  mode_BB->name = id_from_str ("BB", 1);
-  mode_BB->fsigned = 0;
-  mode_BB->ffloat = 0;
+  /* 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");
+      break;
+
+    case irms_reference:
+    case irms_character:
+      assert(0 && "only integer and floating point modes can be vectorized");
+      break;
+
+    case irms_float_number:
+      assert(0 && "not yet implemented");
+      break;
+
+    case irms_int_number:
+      mode = register_mode(&mode_tmpl);
+  }
+  hook_new_mode(&mode_tmpl, mode);
+  return mode;
 }
 
 /* Functions for the direct access to all attributes od a ir_mode */
-
 modecode
-get_mode_modecode (ir_mode *mode)
+(get_mode_modecode)(const ir_mode *mode)
 {
-  assert(mode && "no mode given");
-  return mode->code;
+  ANNOUNCE();
+  return _get_mode_modecode(mode);
 }
 
-/*
-INLINE void
-set_mode_modecode (ir_mode *mode, modecode code)
+ident *
+(get_mode_ident)(const ir_mode *mode)
 {
-  mode->code = code;
+  ANNOUNCE();
+  return _get_mode_ident(mode);
 }
-*/
 
-ident *
-get_mode_ident (ir_mode *mode)
+const char *
+get_mode_name(const ir_mode *mode)
 {
-  assert(mode && "no mode given");
-  return mode->name;
+  ANNOUNCE();
+  return get_id_str(mode->name);
 }
 
-/*
-INLINE void
-set_mode_ident (ir_mode *mode, ident *name)
+mode_sort
+(get_mode_sort)(const ir_mode* mode)
 {
-  mode->name = name;
+  ANNOUNCE();
+  return _get_mode_sort(mode);
 }
-*/
 
-INLINE const char *
-get_mode_name       (ir_mode *mode) {
-  assert(mode);
-  return id_to_str(mode->name);
+int
+(get_mode_size_bits)(const ir_mode *mode)
+{
+  ANNOUNCE();
+  return _get_mode_size_bits(mode);
 }
-/* void  set_mode_name       (ir_mode *mode, char *name);    */
 
 int
-get_mode_size (ir_mode *mode)
-{
-  assert(mode && "no mode given");
-  return mode->size;
+(get_mode_size_bytes)(const ir_mode *mode) {
+  ANNOUNCE();
+  return _get_mode_size_bytes(mode);
 }
-/*
-INLINE void
-set_mode_size (ir_mode *mode, int size)
+
+int
+(get_mode_sign)(const ir_mode *mode)
 {
-  mode->size = size;
+  ANNOUNCE();
+  return _get_mode_sign(mode);
 }
-*/
 
 int
-get_mode_ld_align (ir_mode *mode)
+(get_mode_arithmetic)(const ir_mode *mode)
 {
-  assert(mode && "no mode given");
-  return mode->ld_align;
+  ANNOUNCE();
+  return get_mode_arithmetic(mode);
 }
 
-/*
-INLINE void
-set_mode_ld_align (ir_mode *mode, int ld_align)
-{
-  mode->ld_align = ld_align;
+
+/* 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);
 }
-*/
 
-tarval *
-get_mode_min (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)
 {
-  assert(mode && "no mode given");
-  return mode->min;
+  ANNOUNCE();
+  return _get_mode_link(mode);
 }
 
-/*
-INLINE void
-set_mode_min (ir_mode *mode, tarval *min)
+void
+(set_mode_link)(ir_mode *mode, void *l)
 {
-mode->min = min;
+  _set_mode_link(mode, l);
 }
-*/
 
 tarval *
-get_mode_max (ir_mode *mode)
+get_mode_min (ir_mode *mode)
 {
-  assert(mode && "no mode given");
-  return mode->max;
+  ANNOUNCE();
+  assert(mode);
+  assert(get_mode_modecode(mode) < num_modes);
+  assert(mode_is_data(mode));
+
+  return mode->min;
 }
 
-/*
-INLINE void
-set_mode_max (ir_mode *mode, tarval *max)
+tarval *
+get_mode_max (ir_mode *mode)
 {
-  mode->max = max;
+  ANNOUNCE();
+  assert(mode);
+  assert(get_mode_modecode(mode) < num_modes);
+  assert(mode_is_data(mode));
+
+  return mode->max;
 }
-*/
 
 tarval *
 get_mode_null (ir_mode *mode)
 {
-  assert(mode && "no mode given");
+  ANNOUNCE();
+  assert(mode);
+  assert(get_mode_modecode(mode) < num_modes);
+  assert(mode_is_data(mode));
+
   return mode->null;
 }
 
-/*
-INLINE void
-set_mode_null (ir_mode *mode, tarval *null)
+tarval *
+get_mode_one (ir_mode *mode)
 {
-  mode->null = null;
+  ANNOUNCE();
+  assert(mode);
+  assert(get_mode_modecode(mode) < num_modes);
+  assert(mode_is_data(mode));
+
+  return mode->one;
 }
-*/
 
-unsigned
-get_mode_fsigned (ir_mode *mode)
+tarval *
+get_mode_minus_one (ir_mode *mode)
 {
-  assert(mode && "no mode given");
-  return mode->fsigned;
+  ANNOUNCE();
+  assert(mode);
+  assert(get_mode_modecode(mode) < num_modes);
+  assert(mode_is_data(mode));
+
+  return mode->minus_one;
 }
 
-/*
-INLINE voida
-set_mode_fsigned (ir_mode *mode, unsigned fsigned)
+tarval *
+get_mode_infinite(ir_mode *mode)
 {
-  mode->fsigned = fsigned;
+  ANNOUNCE();
+  assert(mode);
+  assert(get_mode_modecode(mode) < num_modes);
+  assert(mode_is_float(mode));
+
+  return get_tarval_plus_inf(mode);
 }
-*/
 
-unsigned
-get_mode_ffloat (ir_mode *mode)
+tarval *
+get_mode_NAN(ir_mode *mode)
 {
-  assert(mode && "no mode given");
-  return mode->ffloat;
+  ANNOUNCE();
+  assert(mode);
+  assert(get_mode_modecode(mode) < num_modes);
+  assert(mode_is_float(mode));
+
+  return get_tarval_nan(mode);
 }
 
-/*
-INLINE void
-set_mode_ffloat (ir_mode *mode, unsigned ffloat)
-{
-  mode->ffloat = ffloat;
-}
-*/
-
-/* 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_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}
-*/
+int
+is_mode (void *thing) {
+  if (get_kind(thing) == k_ir_mode)
+    return 1;
+  else
+    return 0;
+}
 
 int
-mode_is_signed (ir_mode *mode)
-{
-  int res;
-  unsigned fsigned;
+(mode_is_signed)(const ir_mode *mode) {
+  ANNOUNCE();
+  return _mode_is_signed(mode);
+}
 
-  assert(mode && "no mode given");
-  fsigned = get_mode_fsigned (mode);
-  if (fsigned == 1) {
-    res = 1;
-  }
-  else {
-    res = 0;
-  }
-  return res;
+int
+(mode_is_float)(const ir_mode *mode) {
+  ANNOUNCE();
+  return _mode_is_float(mode);
 }
 
-INLINE int
-mode_is_float (ir_mode *mode)
-{
-  int res;
-  unsigned ffloat;
+int
+(mode_is_int)(const ir_mode *mode) {
+  ANNOUNCE();
+  return _mode_is_int(mode);
+}
 
-  assert(mode && "no mode given");
-  ffloat = get_mode_ffloat (mode);
-  if (ffloat == 1) {
-    res = 1;
-  }
-  else {
-    res = 0;
-  }
-  return res;
+int
+(mode_is_character)(const ir_mode *mode) {
+  ANNOUNCE();
+  return _mode_is_character(mode);
 }
 
+int
+(mode_is_reference)(const ir_mode *mode) {
+  ANNOUNCE();
+  return _mode_is_reference(mode);
+}
 
-INLINE int
-mode_is_int (ir_mode *mode)
-{
-  int res;
-  modecode code;
+int
+(mode_is_num)(const ir_mode *mode) {
+  ANNOUNCE();
+  return _mode_is_num(mode);
+}
 
-  assert(mode && "no mode given");
-  code = get_mode_modecode (mode);
-  if ((code >= irm_Bs) &&  (code <= irm_Lu)) {
-    res = 1;
-  }
-  else {
-    res = 0;
-  }
-  return res;
+int
+(mode_is_numP)(const ir_mode *mode) {
+  ANNOUNCE();
+  return _mode_is_numP(mode);
 }
 
+int
+(mode_is_data)(const ir_mode *mode) {
+  ANNOUNCE();
+  return _mode_is_data(mode);
+}
 
-INLINE int
-mode_is_num (ir_mode *mode)
-{
-  int res;
+int
+(mode_is_datab)(const ir_mode *mode) {
+  ANNOUNCE();
+  return _mode_is_datab(mode);
+}
 
-  assert(mode && "no mode given");
-  if (mode_is_int (mode) || mode_is_float (mode)) {
-    res = 1;
-  }
-  else {
-    res = 0;
-  }
-  return res;
+int
+(mode_is_dataM)(const ir_mode *mode) {
+  ANNOUNCE();
+  return _mode_is_dataM(mode);
 }
 
-INLINE int
-mode_is_data (ir_mode *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 res;
-  modecode code;
-
-  assert(mode && "no mode given");
-  code = get_mode_modecode (mode);
-  if (mode_is_num (mode) ||
-      code == irm_C || code == irm_U || code == irm_P) {
-    res = 1;
-  }
-  else {
-    res = 0;
+  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:
+      switch(get_mode_sort(lm))
+      {
+        case irms_int_number:
+          /* integers are convertable if
+           *   - 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 (   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) && (lm_bits >= sm_bits) )
+              return 1;
+          }
+          else if (mode_is_signed(lm))
+          {
+            if (lm_bits > sm_bits + 1)
+              return 1;
+          }
+          else if (lm_bits >= sm_bits)
+          {
+            return 1;
+          }
+          break;
+
+        case irms_float_number:
+          /* int to float works if the float is large enough */
+          return 0;
+
+        default:
+          break;
+      }
+      break;
+
+    case irms_float_number:
+      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:
+       /* do exist machines out there with different pointer lenghts ?*/
+      return 0;
+
+    default:
+      break;
   }
-  return res;
+
+  /* else */
+  return 0;
 }
 
-int
-mode_is_datab (ir_mode *mode)
+/* initialization, build the default modes */
+void
+init_mode (void)
 {
-  int res;
-  modecode code;
+  ir_mode newmode;
+  ANNOUNCE();
+  /* init flexible array */
 
-  assert(mode && "no mode given");
-  code = get_mode_modecode (mode);
-  if (mode_is_data (mode) || code == irm_b ) {
-    res = 1;
-  }
-  else {
-    res = 0;
-  }
-  return res;
+  obstack_init(&modes);
+
+  num_modes  =  0;
+  /* initialize predefined modes */
+
+  /* Internal Modes */
+  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    = new_id_from_chars("BB", 2);
+  newmode.code    = irm_BB;
+
+  mode_BB = register_mode(&newmode);
+
+/* eXecution */
+  newmode.name    = new_id_from_chars("X", 1);
+  newmode.code    = irm_X;
+
+  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);
+
+  /* Auxiliary Modes */
+  newmode.sort    = irms_auxiliary,
+
+  /* Tuple */
+  newmode.name    = new_id_from_chars("T", 1);
+  newmode.code    = irm_T;
+
+  mode_T = register_mode(&newmode);
+
+  /* ANY */
+  newmode.name    = new_id_from_chars("ANY", 3);
+  newmode.code    = irm_ANY;
+
+  mode_ANY = register_mode(&newmode);
+
+  /* BAD */
+  newmode.name    = new_id_from_chars("BAD", 3);
+  newmode.code    = irm_BAD;
+
+  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);
+
+/* Data Modes */
+  newmode.vector_elem = 1;
+
+  /* Float Number Modes */
+  newmode.sort       = irms_float_number;
+  newmode.arithmetic = irma_ieee754;
+
+  /* float */
+  newmode.name    = new_id_from_chars("F", 1);
+  newmode.code    = irm_F;
+  newmode.sign    = 1;
+  newmode.size    = 32;
+
+  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);
+
+  /* extended */
+  newmode.name    = new_id_from_chars("E", 1);
+  newmode.code    = irm_E;
+  newmode.sign    = 1;
+  newmode.size    = 80;
+
+  mode_E = register_mode(&newmode);
+
+  /* Integer Number Modes */
+  newmode.sort         = irms_int_number;
+  newmode.arithmetic   = irma_twos_complement;
+
+  /* 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);
+
+  /* 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);
+
+  /* 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);
+
+  /* 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);
+
+  /* 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);
+
+  /* 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);
+
+  /* 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);
+
+  /* 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);
+
+  /* Character Modes */
+  newmode.sort         = irms_character;
+  newmode.arithmetic   = irma_none;
+
+  /* Character */
+  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         = 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);
+
+  /* Reference Modes */
+  newmode.sort    = irms_reference;
+  newmode.arithmetic = irma_twos_complement;
+
+  /* pointer */
+  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 predefined ones */
+  mode_P_mach = mode_P;
 }
 
-int
-mode_is_dataM (ir_mode *mode)
+/* 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);
+}
+
+/*
+ * 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)
+{
+  /* for floating point, we know that IEEE 754 has +0 and -0,
+   * but always handles it identical.
+   */
+  if (mode->sort == irms_float_number)
+    return mode->arithmetic == irma_ieee754 ? 0 : 1;
+  return 0;
+}
+
+/*
+ * Returns non-zero if the given mode might overflow on unary Minus.
+ *
+ * This does NOT happen on IEEE 754.
+ */
+int mode_overflow_on_unary_Minus(const ir_mode *mode)
 {
-  int res;
-  modecode code;
+  if (mode->sort == irms_float_number)
+    return mode->arithmetic == irma_ieee754 ? 0 : 1;
+  return 1;
+}
 
-  assert(mode && "no mode given");
-  code = get_mode_modecode (mode);
-  if (mode_is_data (mode) || code == irm_M) {
-    res = 1;
-  }
-  else {
-    res = 0;
-  }
-  return res;
+/*
+ * Returns non-zero if the mode has a reversed wrap-aound
+ * logic, especially (a + x) - x == a.
+ *
+ * This is normally true for integer modes, not for floating
+ * point modes.
+ */
+int mode_wrap_around(const ir_mode *mode) {
+  /* FIXME: better would be an extra mode property */
+  return mode_is_int(mode);
 }
 
-/* Returns true if sm can be converted to lm without loss. */
-bool
-smaller_mode(ir_mode *sm, ir_mode *lm) {
-  if ((mode_is_int(sm) && mode_is_int(lm)) &&
-      get_mode_modecode(sm) <= get_mode_modecode(lm))
-    return true;
-  if ((mode_is_float(sm) && mode_is_float(lm)) &&
-      get_mode_modecode(sm) <= get_mode_modecode(lm))
-    return true;
-  return(false);
+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;
 }