- implemented get_irg_value_param_type()
[libfirm] / ir / lower / lower_dw.c
index a161c10..8770fbd 100644 (file)
@@ -1,30 +1,37 @@
-/**
- * @file irlwrdw.c
- * @date 8.10.2004
- * @author Michael Beck
- * @brief Lower Double word operations, ie Mode L -> I.
+/*
+ * Copyright (C) 1995-2008 University of Karlsruhe.  All right reserved.
+ *
+ * This file is part of libFirm.
+ *
+ * This file may be distributed and/or modified under the terms of the
+ * GNU General Public License version 2 as published by the Free Software
+ * Foundation and appearing in the file LICENSE.GPL included in the
+ * packaging of this file.
+ *
+ * Licensees holding valid libFirm Professional Edition licenses may use
+ * this file in accordance with the libFirm Commercial License.
+ * Agreement provided with the Software.
  *
- * $Id$
+ * This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
+ * WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE.
  */
-#ifdef HAVE_CONFIG_H
-# include "config.h"
-#endif
 
-#ifdef HAVE_MALLOC_H
-# include <malloc.h>
-#endif
-#ifdef HAVE_ALLOCA_H
-# include <alloca.h>
-#endif
-#ifdef HAVE_STRING_H
-# include <string.h>
-#endif
-#ifdef HAVE_STDLIB_H
-# include <stdlib.h>
-#endif
+/**
+ * @file
+ * @brief   Lower Double word operations, ie 64bit -> 32bit, 32bit -> 16bit etc.
+ * @date    8.10.2004
+ * @author  Michael Beck
+ * @version $Id$
+ */
+#include "config.h"
 
+#include <string.h>
+#include <stdlib.h>
 #include <assert.h>
 
+#include "error.h"
+#include "lowering.h"
 #include "irnode_t.h"
 #include "irgraph_t.h"
 #include "irmode_t.h"
@@ -37,7 +44,6 @@
 #include "firmstat.h"
 #include "irgwalk.h"
 #include "ircons.h"
-#include "lower_dw.h"
 #include "irflag.h"
 #include "irtools.h"
 #include "debug.h"
@@ -45,6 +51,7 @@
 #include "pmap.h"
 #include "pdeq.h"
 #include "irdump.h"
+#include "array_t.h"
 
 /** A map from mode to a primitive type. */
 static pmap *prim_types;
@@ -71,7 +78,7 @@ typedef struct _op_mode_entry {
        const ir_op   *op;    /**< the op */
        const ir_mode *imode; /**< the input mode */
        const ir_mode *omode; /**< the output mode */
-       entity        *ent;   /**< the associated entity of this (op, imode, omode) triple */
+       ir_entity     *ent;   /**< the associated entity of this (op, imode, omode) triple */
 } op_mode_entry_t;
 
 /**
@@ -88,13 +95,13 @@ typedef struct _conv_tp_entry {
  * we need some store to hold the replacement:
  */
 typedef struct _node_entry_t {
-       ir_node *low_word;        /**< the low word */
-       ir_node *high_word;       /**< the high word */
+       ir_node *low_word;    /**< the low word */
+       ir_node *high_word;   /**< the high word */
 } node_entry_t;
 
 enum lower_flags {
-       MUST_BE_LOWERED = 1,   /**< graph must be lowered */
-       CF_CHANGED      = 2,   /**< control flow was changed */
+       MUST_BE_LOWERED = 1,  /**< graph must be lowered */
+       CF_CHANGED      = 2,  /**< control flow was changed */
 };
 
 /**
@@ -103,13 +110,19 @@ enum lower_flags {
 typedef struct _lower_env_t {
        node_entry_t **entries;       /**< entries per node */
        struct obstack obst;          /**< an obstack holding the temporary data */
+       ir_type  *l_mtp;              /**< lowered method type of the current method */
        tarval   *tv_mode_bytes;      /**< a tarval containing the number of bytes in the lowered modes */
        tarval   *tv_mode_bits;       /**< a tarval containing the number of bits in the lowered modes */
        pdeq     *waitq;              /**< a wait queue of all nodes that must be handled later */
        pmap     *proj_2_block;       /**< a map from ProjX to its destination blocks */
+       ident    *first_id;           /**< .l for little and .h for big endian */
+       ident    *next_id;            /**< .h for little and .l for big endian */
        const lwrdw_param_t *params;  /**< transformation parameter */
        unsigned flags;               /**< some flags */
        int      n_entries;           /**< number of entries */
+#ifndef NDEBUG
+       ir_type  *value_param_tp;     /**< the old value param type */
+#endif
 } lower_env_t;
 
 /**
@@ -158,36 +171,31 @@ static ir_type *get_conv_type(ir_mode *imode, ir_mode *omode, lower_env_t *env)
                /* set param types and result types */
                n_param = 0;
                if (imode == env->params->high_signed) {
+                       set_method_param_type(mtd, n_param++, tp_u);
                        set_method_param_type(mtd, n_param++, tp_s);
-                       set_method_param_type(mtd, n_param++, tp_s);
-               }
-               else if (imode == env->params->high_unsigned) {
+               } else if (imode == env->params->high_unsigned) {
                        set_method_param_type(mtd, n_param++, tp_u);
                        set_method_param_type(mtd, n_param++, tp_u);
-               }
-               else {
+               } else {
                        ir_type *tp = get_primitive_type(imode);
                        set_method_param_type(mtd, n_param++, tp);
-               }
+               }  /* if */
 
                n_res = 0;
                if (omode == env->params->high_signed) {
+                       set_method_res_type(mtd, n_res++, tp_u);
                        set_method_res_type(mtd, n_res++, tp_s);
-                       set_method_res_type(mtd, n_res++, tp_s);
-               }
-               else if (omode == env->params->high_unsigned) {
+               } else if (omode == env->params->high_unsigned) {
                        set_method_res_type(mtd, n_res++, tp_u);
                        set_method_res_type(mtd, n_res++, tp_u);
-               }
-               else {
+               } else {
                        ir_type *tp = get_primitive_type(omode);
                        set_method_res_type(mtd, n_res++, tp);
-               }
-
+               }  /* if */
                entry->mtd = mtd;
-       }
-       else
+       } else {
                mtd = entry->mtd;
+       }  /* if */
        return mtd;
 }  /* get_conv_type */
 
@@ -210,12 +218,12 @@ static void add_block_cf_input_nr(ir_node *block, int nr, ir_node *cf)
 
        set_irn_in(block, i + 1, in);
 
-       for (phi = get_irn_link(block); phi; phi = get_irn_link(phi)) {
+       for (phi = get_Block_phis(block); phi != NULL; phi = get_Phi_next(phi)) {
                for (i = 0; i < arity; ++i)
                        in[i] = get_irn_n(phi, i);
                in[i] = in[nr];
                set_irn_in(phi, i + 1, in);
-       }
+       }  /* for */
 }  /* add_block_cf_input_nr */
 
 /**
@@ -232,8 +240,8 @@ static void add_block_cf_input(ir_node *block, ir_node *tmpl, ir_node *cf)
                if (get_irn_n(block, i) == tmpl) {
                        nr = i;
                        break;
-               }
-       }
+               }  /* if */
+       }  /* for */
        assert(i < arity);
        add_block_cf_input_nr(block, nr, cf);
 }  /* add_block_cf_input */
@@ -246,25 +254,19 @@ static ir_mode *get_irn_op_mode(ir_node *node)
        switch (get_irn_opcode(node)) {
        case iro_Load:
                return get_Load_mode(node);
-
        case iro_Store:
                return get_irn_mode(get_Store_value(node));
-
        case iro_DivMod:
                return get_irn_mode(get_DivMod_left(node));
-
        case iro_Div:
                return get_irn_mode(get_Div_left(node));
-
        case iro_Mod:
                return get_irn_mode(get_Mod_left(node));
-
        case iro_Cmp:
                return get_irn_mode(get_Cmp_left(node));
-
        default:
                return get_irn_mode(node);
-       }
+       }  /* switch */
 }  /* get_irn_op_mode */
 
 /**
@@ -275,7 +277,7 @@ static void prepare_links(ir_node *node, void *env)
        lower_env_t  *lenv = env;
        ir_mode      *mode = get_irn_op_mode(node);
        node_entry_t *link;
-       int          i;
+       int          i, idx;
 
        if (mode == lenv->params->high_signed ||
                mode == lenv->params->high_unsigned) {
@@ -284,26 +286,30 @@ static void prepare_links(ir_node *node, void *env)
 
                memset(link, 0, sizeof(*link));
 
-               lenv->entries[get_irn_idx(node)] = link;
+               idx = get_irn_idx(node);
+               if (idx >= lenv->n_entries) {
+                       /* enlarge: this happens only for Rotl nodes which is RARELY */
+                       int old = lenv->n_entries;
+                       int n_idx = idx + (idx >> 3);
+
+                       ARR_RESIZE(node_entry_t *, lenv->entries, n_idx);
+                       memset(&lenv->entries[old], 0, (n_idx - old) * sizeof(lenv->entries[0]));
+                       lenv->n_entries = n_idx;
+               }
+               lenv->entries[idx] = link;
                lenv->flags |= MUST_BE_LOWERED;
-       }
-       else if (get_irn_op(node) == op_Conv) {
+       } else if (is_Conv(node)) {
                /* Conv nodes have two modes */
                ir_node *pred = get_Conv_op(node);
                mode = get_irn_mode(pred);
 
                if (mode == lenv->params->high_signed ||
                        mode == lenv->params->high_unsigned) {
-                       /* must lower this node either */
-                       link = obstack_alloc(&lenv->obst, sizeof(*link));
-
-                       memset(link, 0, sizeof(*link));
-
-                       lenv->entries[get_irn_idx(node)] = link;
+                       /* must lower this node either but don't need a link */
                        lenv->flags |= MUST_BE_LOWERED;
-               }
+               }  /* if */
                return;
-       }
+       }  /* if */
 
        if (is_Proj(node)) {
                /* link all Proj nodes to its predecessor:
@@ -312,23 +318,19 @@ static void prepare_links(ir_node *node, void *env)
 
                set_irn_link(node, get_irn_link(pred));
                set_irn_link(pred, node);
-       }
-       else if (is_Phi(node)) {
+       } else if (is_Phi(node)) {
                /* link all Phi nodes to its block */
                ir_node *block = get_nodes_block(node);
-
-               set_irn_link(node, get_irn_link(block));
-               set_irn_link(block, node);
-       }
-       else if (is_Block(node)) {
+               add_Block_phi(block, node);
+       } else if (is_Block(node)) {
                /* fill the Proj -> Block map */
                for (i = get_Block_n_cfgpreds(node) - 1; i >= 0; --i) {
                        ir_node *pred = get_Block_cfgpred(node, i);
 
                        if (is_Proj(pred))
                                pmap_insert(lenv->proj_2_block, pred, node);
-               }
-       }
+               }  /* for */
+       }  /* if */
 }  /* prepare_links */
 
 /**
@@ -338,17 +340,17 @@ static void lower_Const(ir_node *node, ir_mode *mode, lower_env_t *env) {
        tarval   *tv, *tv_l, *tv_h;
        ir_node  *low, *high;
        dbg_info *dbg = get_irn_dbg_info(node);
-       ir_node  *block = get_nodes_block(node);
        int      idx;
        ir_graph *irg = current_ir_graph;
+       ir_mode  *low_mode = env->params->low_unsigned;
 
        tv   = get_Const_tarval(node);
 
-       tv_l = tarval_convert_to(tv, mode);
-       low  = new_rd_Const(dbg, irg, block, mode, tv_l);
+       tv_l = tarval_convert_to(tv, low_mode);
+       low  = new_rd_Const(dbg, irg, tv_l);
 
        tv_h = tarval_convert_to(tarval_shrs(tv, env->tv_mode_bits), mode);
-       high = new_rd_Const(dbg, irg, block, mode, tv_h);
+       high = new_rd_Const(dbg, irg, tv_h);
 
        idx = get_irn_idx(node);
        assert(idx < env->n_entries);
@@ -360,35 +362,34 @@ static void lower_Const(ir_node *node, ir_mode *mode, lower_env_t *env) {
  * Translate a Load: create two.
  */
 static void lower_Load(ir_node *node, ir_mode *mode, lower_env_t *env) {
-       ir_graph *irg = current_ir_graph;
-       ir_node  *adr = get_Load_ptr(node);
-       ir_node  *mem = get_Load_mem(node);
-       ir_node  *low, *high, *proj;
-       dbg_info *dbg;
-       ir_node  *block = get_nodes_block(node);
-       int      idx;
+       ir_mode    *low_mode = env->params->low_unsigned;
+       ir_graph   *irg = current_ir_graph;
+       ir_node    *adr = get_Load_ptr(node);
+       ir_node    *mem = get_Load_mem(node);
+       ir_node    *low, *high, *proj;
+       dbg_info   *dbg;
+       ir_node    *block = get_nodes_block(node);
+       int         idx;
+       ir_cons_flags volatility = get_Load_volatility(node) == volatility_is_volatile
+                                ? cons_volatile : 0;
 
        if (env->params->little_endian) {
                low  = adr;
                high = new_r_Add(irg, block, adr,
-                       new_r_Const(irg, block, get_tarval_mode(env->tv_mode_bytes), env->tv_mode_bytes),
+                       new_r_Const(irg, env->tv_mode_bytes),
                        get_irn_mode(adr));
-       }
-       else {
+       } else {
                low  = new_r_Add(irg, block, adr,
-                       new_r_Const(irg, block, get_tarval_mode(env->tv_mode_bytes), env->tv_mode_bytes),
+                       new_r_Const(irg, env->tv_mode_bytes),
                        get_irn_mode(adr));
                high = adr;
-       }
+       }  /* if */
 
        /* create two loads */
        dbg  = get_irn_dbg_info(node);
-       low  = new_rd_Load(dbg, irg, block, mem, low,  mode);
+       low  = new_rd_Load(dbg, irg, block, mem,  low,  low_mode, volatility);
        proj = new_r_Proj(irg, block, low, mode_M, pn_Load_M);
-       high = new_rd_Load(dbg, irg, block, proj, high, mode);
-
-       set_Load_volatility(low,  get_Load_volatility(node));
-       set_Load_volatility(high, get_Load_volatility(node));
+       high = new_rd_Load(dbg, irg, block, proj, high, mode, volatility);
 
        idx = get_irn_idx(node);
        assert(idx < env->n_entries);
@@ -409,28 +410,31 @@ static void lower_Load(ir_node *node, ir_mode *mode, lower_env_t *env) {
                        break;
                case pn_Load_res:       /* Result of load operation. */
                        assert(idx < env->n_entries);
-                       env->entries[idx]->low_word  = new_r_Proj(irg, block, low, mode, pn_Load_res);
-                       env->entries[idx]->high_word = new_r_Proj(irg, block, high, mode, pn_Load_res);
+                       env->entries[idx]->low_word  = new_r_Proj(irg, block, low,  low_mode, pn_Load_res);
+                       env->entries[idx]->high_word = new_r_Proj(irg, block, high, mode,     pn_Load_res);
                        break;
                default:
                        assert(0 && "unexpected Proj number");
-               }
+               }  /* switch */
                /* mark this proj: we have handled it already, otherwise we might fall into
                 * out new nodes. */
                mark_irn_visited(proj);
-       }
+       }  /* for */
 }  /* lower_Load */
 
 /**
  * Translate a Store: create two.
  */
 static void lower_Store(ir_node *node, ir_mode *mode, lower_env_t *env) {
-       ir_graph *irg;
-       ir_node  *block, *adr, *mem;
-       ir_node  *low, *high, *irn, *proj;
-       dbg_info *dbg;
-       int      idx;
+       ir_graph     *irg;
+       ir_node      *block, *adr, *mem;
+       ir_node      *low, *high, *irn, *proj;
+       dbg_info     *dbg;
+       int           idx;
        node_entry_t *entry;
+       ir_cons_flags    volatility = get_Store_volatility(node) == volatility_is_volatile
+                                  ? cons_volatile : 0;
+       (void) mode;
 
        irn = get_Store_value(node);
        entry = env->entries[get_irn_idx(irn)];
@@ -440,7 +444,7 @@ static void lower_Store(ir_node *node, ir_mode *mode, lower_env_t *env) {
                /* not ready yet, wait */
                pdeq_putr(env->waitq, node);
                return;
-       }
+       }  /* if */
 
        irg = current_ir_graph;
        adr = get_Store_ptr(node);
@@ -450,24 +454,20 @@ static void lower_Store(ir_node *node, ir_mode *mode, lower_env_t *env) {
        if (env->params->little_endian) {
                low  = adr;
                high = new_r_Add(irg, block, adr,
-                       new_r_Const(irg, block, get_tarval_mode(env->tv_mode_bytes), env->tv_mode_bytes),
+                       new_r_Const(irg, env->tv_mode_bytes),
                        get_irn_mode(adr));
-       }
-       else {
+       } else {
                low  = new_r_Add(irg, block, adr,
-                       new_r_Const(irg, block, get_tarval_mode(env->tv_mode_bytes), env->tv_mode_bytes),
+                       new_r_Const(irg, env->tv_mode_bytes),
                        get_irn_mode(adr));
                high = adr;
-       }
+       }  /* if */
 
        /* create two Stores */
        dbg = get_irn_dbg_info(node);
-       low  = new_rd_Store(dbg, irg, block, mem, low,  entry->low_word);
+       low  = new_rd_Store(dbg, irg, block, mem, low,  entry->low_word, volatility);
        proj = new_r_Proj(irg, block, low, mode_M, pn_Store_M);
-       high = new_rd_Store(dbg, irg, block, proj, high, entry->high_word);
-
-       set_Store_volatility(low,  get_Store_volatility(node));
-       set_Store_volatility(high, get_Store_volatility(node));
+       high = new_rd_Store(dbg, irg, block, proj, high, entry->high_word, volatility);
 
        idx = get_irn_idx(node);
        assert(idx < env->n_entries);
@@ -488,11 +488,11 @@ static void lower_Store(ir_node *node, ir_mode *mode, lower_env_t *env) {
                        break;
                default:
                        assert(0 && "unexpected Proj number");
-               }
+               }  /* switch */
                /* mark this proj: we have handled it already, otherwise we might fall into
                 * out new nodes. */
                mark_irn_visited(proj);
-       }
+       }  /* for */
 }  /* lower_Store */
 
 /**
@@ -509,7 +509,7 @@ static ir_node *get_intrinsic_address(ir_type *method, ir_op *op,
                                       ir_mode *imode, ir_mode *omode,
                                       ir_node *block, lower_env_t *env) {
        symconst_symbol sym;
-       entity *ent;
+       ir_entity *ent;
        op_mode_entry_t key, *entry;
 
        key.op    = op;
@@ -525,12 +525,11 @@ static ir_node *get_intrinsic_address(ir_type *method, ir_op *op,
 
                assert(ent && "Intrinsic creator must return an entity");
                entry->ent = ent;
-       }
-       else
+       } else {
                ent = entry->ent;
-
+       }  /* if */
        sym.entity_p = ent;
-       return new_r_SymConst(current_ir_graph, block, sym, symconst_addr_ent);
+       return new_r_SymConst(current_ir_graph, block, mode_P_code, sym, symconst_addr_ent);
 }  /* get_intrinsic_address */
 
 /**
@@ -556,7 +555,7 @@ static void lower_Div(ir_node *node, ir_mode *mode, lower_env_t *env) {
                /* not ready yet, wait */
                pdeq_putr(env->waitq, node);
                return;
-       }
+       }  /* if */
 
        in[0] = entry->low_word;
        in[1] = entry->high_word;
@@ -569,7 +568,7 @@ static void lower_Div(ir_node *node, ir_mode *mode, lower_env_t *env) {
                /* not ready yet, wait */
                pdeq_putr(env->waitq, node);
                return;
-       }
+       }  /* if */
 
        in[2] = entry->low_word;
        in[3] = entry->high_word;
@@ -601,16 +600,16 @@ static void lower_Div(ir_node *node, ir_mode *mode, lower_env_t *env) {
                case pn_Div_res:       /* Result of computation. */
                        idx = get_irn_idx(proj);
                        assert(idx < env->n_entries);
-                       env->entries[idx]->low_word  = new_r_Proj(current_ir_graph, block, irn, mode, 0);
-                       env->entries[idx]->high_word = new_r_Proj(current_ir_graph, block, irn, mode, 1);
+                       env->entries[idx]->low_word  = new_r_Proj(current_ir_graph, block, irn, env->params->low_unsigned, 0);
+                       env->entries[idx]->high_word = new_r_Proj(current_ir_graph, block, irn, mode,                      1);
                        break;
                default:
                        assert(0 && "unexpected Proj number");
-               }
+               }  /* switch */
                /* mark this proj: we have handled it already, otherwise we might fall into
                 * out new nodes. */
                mark_irn_visited(proj);
-       }
+       }  /* for */
 }  /* lower_Div */
 
 /**
@@ -636,7 +635,7 @@ static void lower_Mod(ir_node *node, ir_mode *mode, lower_env_t *env) {
                /* not ready yet, wait */
                pdeq_putr(env->waitq, node);
                return;
-       }
+       }  /* if */
 
        in[0] = entry->low_word;
        in[1] = entry->high_word;
@@ -649,7 +648,7 @@ static void lower_Mod(ir_node *node, ir_mode *mode, lower_env_t *env) {
                /* not ready yet, wait */
                pdeq_putr(env->waitq, node);
                return;
-       }
+       }  /* if */
 
        in[2] = entry->low_word;
        in[3] = entry->high_word;
@@ -681,16 +680,16 @@ static void lower_Mod(ir_node *node, ir_mode *mode, lower_env_t *env) {
                case pn_Mod_res:       /* Result of computation. */
                        idx = get_irn_idx(proj);
                        assert(idx < env->n_entries);
-                       env->entries[idx]->low_word  = new_r_Proj(irg, block, irn, mode, 0);
-                       env->entries[idx]->high_word = new_r_Proj(irg, block, irn, mode, 1);
+                       env->entries[idx]->low_word  = new_r_Proj(irg, block, irn, env->params->low_unsigned, 0);
+                       env->entries[idx]->high_word = new_r_Proj(irg, block, irn, mode,                      1);
                        break;
                default:
                        assert(0 && "unexpected Proj number");
-               }
+               }  /* switch */
                /* mark this proj: we have handled it already, otherwise we might fall into
                 * out new nodes. */
                mark_irn_visited(proj);
-       }
+       }  /* for */
 }  /* lower_Mod */
 
 /**
@@ -699,7 +698,9 @@ static void lower_Mod(ir_node *node, ir_mode *mode, lower_env_t *env) {
  * Create two intrinsic Calls.
  */
 static void lower_DivMod(ir_node *node, ir_mode *mode, lower_env_t *env) {
-       ir_node  *block, *proj, *irn, *mem, *callDiv, *callMod, *resDiv, *resMod;
+       ir_node  *block, *proj, *irn, *mem, *callDiv, *callMod;
+       ir_node  *resDiv = NULL;
+       ir_node  *resMod = NULL;
        ir_node  *in[4];
        ir_mode  *opmode;
        dbg_info *dbg;
@@ -715,8 +716,8 @@ static void lower_DivMod(ir_node *node, ir_mode *mode, lower_env_t *env) {
                case pn_DivMod_res_div: flags |= 1; break;
                case pn_DivMod_res_mod: flags |= 2; break;
                default: break;
-               }
-       }
+               }  /* switch */
+       }  /* for */
 
        irn   = get_DivMod_left(node);
        entry = env->entries[get_irn_idx(irn)];
@@ -726,7 +727,7 @@ static void lower_DivMod(ir_node *node, ir_mode *mode, lower_env_t *env) {
                /* not ready yet, wait */
                pdeq_putr(env->waitq, node);
                return;
-       }
+       }  /* if */
 
        in[0] = entry->low_word;
        in[1] = entry->high_word;
@@ -739,7 +740,7 @@ static void lower_DivMod(ir_node *node, ir_mode *mode, lower_env_t *env) {
                /* not ready yet, wait */
                pdeq_putr(env->waitq, node);
                return;
-       }
+       }  /* if */
 
        in[2] = entry->low_word;
        in[3] = entry->high_word;
@@ -759,7 +760,7 @@ static void lower_DivMod(ir_node *node, ir_mode *mode, lower_env_t *env) {
                        irn, 4, in, mtp);
                set_irn_pinned(callDiv, get_irn_pinned(node));
                resDiv = new_r_Proj(irg, block, callDiv, mode_T, pn_Call_T_result);
-       }
+       }  /* if */
        if (flags & 2) {
                if (flags & 1)
                        mem = new_r_Proj(irg, block, callDiv, mode_M, pn_Call_M);
@@ -769,7 +770,7 @@ static void lower_DivMod(ir_node *node, ir_mode *mode, lower_env_t *env) {
                        irn, 4, in, mtp);
                set_irn_pinned(callMod, get_irn_pinned(node));
                resMod = new_r_Proj(irg, block, callMod, mode_T, pn_Call_T_result);
-       }
+       }  /* if */
 
        for (proj = get_irn_link(node); proj; proj = get_irn_link(proj)) {
                switch (get_Proj_proj(proj)) {
@@ -786,21 +787,21 @@ static void lower_DivMod(ir_node *node, ir_mode *mode, lower_env_t *env) {
                case pn_DivMod_res_div:   /* Result of Div. */
                        idx = get_irn_idx(proj);
                        assert(idx < env->n_entries);
-                       env->entries[idx]->low_word  = new_r_Proj(irg, block, resDiv, mode, 0);
-                       env->entries[idx]->high_word = new_r_Proj(irg, block, resDiv, mode, 1);
+                       env->entries[idx]->low_word  = new_r_Proj(irg, block, resDiv, env->params->low_unsigned, 0);
+                       env->entries[idx]->high_word = new_r_Proj(irg, block, resDiv, mode,                      1);
                        break;
                case pn_DivMod_res_mod:   /* Result of Mod. */
                        idx = get_irn_idx(proj);
-                       env->entries[idx]->low_word  = new_r_Proj(irg, block, resMod, mode, 0);
-                       env->entries[idx]->high_word = new_r_Proj(irg, block, resMod, mode, 1);
+                       env->entries[idx]->low_word  = new_r_Proj(irg, block, resMod, env->params->low_unsigned, 0);
+                       env->entries[idx]->high_word = new_r_Proj(irg, block, resMod, mode,                      1);
                        break;
                default:
                        assert(0 && "unexpected Proj number");
-               }
+               }  /* switch */
                /* mark this proj: we have handled it already, otherwise we might fall into
                 * out new nodes. */
                mark_irn_visited(proj);
-       }
+       }  /* for */
 }  /* lower_DivMod */
 
 /**
@@ -825,7 +826,7 @@ static void lower_Binop(ir_node *node, ir_mode *mode, lower_env_t *env) {
                /* not ready yet, wait */
                pdeq_putr(env->waitq, node);
                return;
-       }
+       }  /* if */
 
        in[0] = entry->low_word;
        in[1] = entry->high_word;
@@ -838,7 +839,7 @@ static void lower_Binop(ir_node *node, ir_mode *mode, lower_env_t *env) {
                /* not ready yet, wait */
                pdeq_putr(env->waitq, node);
                return;
-       }
+       }  /* if */
 
        in[2] = entry->low_word;
        in[3] = entry->high_word;
@@ -856,8 +857,8 @@ static void lower_Binop(ir_node *node, ir_mode *mode, lower_env_t *env) {
 
        idx = get_irn_idx(node);
        assert(idx < env->n_entries);
-       env->entries[idx]->low_word  = new_r_Proj(irg, block, irn, mode, 0);
-       env->entries[idx]->high_word = new_r_Proj(irg, block, irn, mode, 1);
+       env->entries[idx]->low_word  = new_r_Proj(irg, block, irn, env->params->low_unsigned, 0);
+       env->entries[idx]->high_word = new_r_Proj(irg, block, irn, mode,                      1);
 }  /* lower_Binop */
 
 /**
@@ -882,7 +883,7 @@ static void lower_Shiftop(ir_node *node, ir_mode *mode, lower_env_t *env) {
                /* not ready yet, wait */
                pdeq_putr(env->waitq, node);
                return;
-       }
+       }  /* if */
 
        in[0] = entry->low_word;
        in[1] = entry->high_word;
@@ -903,8 +904,8 @@ static void lower_Shiftop(ir_node *node, ir_mode *mode, lower_env_t *env) {
 
        idx = get_irn_idx(node);
        assert(idx < env->n_entries);
-       env->entries[idx]->low_word  = new_r_Proj(irg, block, irn, mode, 0);
-       env->entries[idx]->high_word = new_r_Proj(irg, block, irn, mode, 1);
+       env->entries[idx]->low_word  = new_r_Proj(irg, block, irn, env->params->low_unsigned, 0);
+       env->entries[idx]->high_word = new_r_Proj(irg, block, irn, mode,                      1);
 }  /* lower_Shiftop */
 
 /**
@@ -918,7 +919,7 @@ static void lower_Shr(ir_node *node, ir_mode *mode, lower_env_t *env) {
                tarval *tv = get_Const_tarval(right);
 
                if (tarval_is_long(tv) &&
-                       get_tarval_long(tv) >= get_mode_size_bits(mode)) {
+                   get_tarval_long(tv) >= (long)get_mode_size_bits(mode)) {
                        ir_node *block = get_nodes_block(node);
                        ir_node *left = get_Shr_left(node);
                        ir_node *c;
@@ -929,16 +930,16 @@ static void lower_Shr(ir_node *node, ir_mode *mode, lower_env_t *env) {
                        idx = get_irn_idx(node);
 
                        if (shf_cnt > 0) {
-                               c = new_r_Const_long(irg, block, mode_Iu, shf_cnt);
+                               c = new_r_Const_long(irg, env->params->low_unsigned, shf_cnt);
                                env->entries[idx]->low_word = new_r_Shr(irg, block, left, c, mode);
-                       }
-                       else
+                       } else {
                                env->entries[idx]->low_word = left;
-                       env->entries[idx]->high_word = new_r_Const(irg, block, mode, get_mode_null(mode));
+                       }  /* if */
+                       env->entries[idx]->high_word = new_r_Const(irg, get_mode_null(mode));
 
                        return;
-               }
-       }
+               }  /* if */
+       }  /* if */
        lower_Shiftop(node, mode, env);
 }  /* lower_Shr */
 
@@ -953,27 +954,29 @@ static void lower_Shl(ir_node *node, ir_mode *mode, lower_env_t *env) {
                tarval *tv = get_Const_tarval(right);
 
                if (tarval_is_long(tv) &&
-                       get_tarval_long(tv) >= get_mode_size_bits(mode)) {
+                   get_tarval_long(tv) >= (long)get_mode_size_bits(mode)) {
+                       ir_mode *mode_l;
                        ir_node *block = get_nodes_block(node);
                        ir_node *left = get_Shl_left(node);
                        ir_node *c;
                        long shf_cnt = get_tarval_long(tv) - get_mode_size_bits(mode);
                        int idx = get_irn_idx(left);
 
-                       left = env->entries[idx]->low_word;
+                       left = new_r_Conv(irg, block, env->entries[idx]->low_word, mode);
                        idx = get_irn_idx(node);
 
+                       mode_l = env->params->low_unsigned;
                        if (shf_cnt > 0) {
-                               c = new_r_Const_long(irg, block, mode_Iu, shf_cnt);
+                               c = new_r_Const_long(irg, mode_l, shf_cnt);
                                env->entries[idx]->high_word = new_r_Shl(irg, block, left, c, mode);
-                       }
-                       else
+                       } else {
                                env->entries[idx]->high_word = left;
-                       env->entries[idx]->low_word  = new_r_Const(irg, block, mode, get_mode_null(mode));
+                       }  /* if */
+                       env->entries[idx]->low_word  = new_r_Const(irg, get_mode_null(mode_l));
 
                        return;
-               }
-       }
+               }  /* if */
+       }  /* if */
        lower_Shiftop(node, mode, env);
 }  /* lower_Shl */
 
@@ -988,59 +991,118 @@ static void lower_Shrs(ir_node *node, ir_mode *mode, lower_env_t *env) {
                tarval *tv = get_Const_tarval(right);
 
                if (tarval_is_long(tv) &&
-                       get_tarval_long(tv) >= get_mode_size_bits(mode)) {
-                       ir_node *block = get_nodes_block(node);
-                       ir_node *left = get_Shrs_left(node);
-                       long shf_cnt = get_tarval_long(tv) - get_mode_size_bits(mode);
+                   get_tarval_long(tv) >= (long)get_mode_size_bits(mode)) {
+                       ir_node *block   = get_nodes_block(node);
+                       ir_node *left    = get_Shrs_left(node);
+                       long     shf_cnt = get_tarval_long(tv) - get_mode_size_bits(mode);
+                       int      idx     = get_irn_idx(left);
+                       ir_mode *mode_l;
+                       ir_node *low;
                        ir_node *c;
-                       int idx = get_irn_idx(left);
 
                        left = env->entries[idx]->high_word;
                        idx = get_irn_idx(node);
 
+                       mode_l = env->params->low_unsigned;
                        if (shf_cnt > 0) {
-                               c = new_r_Const_long(irg, block, mode_Iu, shf_cnt);
-                               env->entries[idx]->low_word = new_r_Shrs(irg, block, left, c, mode);
-                       }
-                       else
-                               env->entries[idx]->low_word = left;
-
-                       c = new_r_Const_long(irg, block, mode_Iu, get_mode_size_bits(mode) - 1);
+                               c   = new_r_Const_long(irg, mode_l, shf_cnt);
+                               low = new_r_Shrs(irg, block, left, c, mode);
+                       } else {
+                               low = left;
+                       }  /* if */
+                       /* low word is expected to have mode_l */
+                       env->entries[idx]->low_word = new_r_Conv(irg, block, low, mode_l);
+
+                       c = new_r_Const_long(irg, mode_l, get_mode_size_bits(mode) - 1);
                        env->entries[idx]->high_word = new_r_Shrs(irg, block, left, c, mode);
 
                        return;
-               }
-       }
+               }  /* if */
+       }  /* if */
        lower_Shiftop(node, mode, env);
 }  /* lower_Shrs */
 
 /**
- * Translate a Rot and handle special cases.
+ * Rebuild Rotl nodes into Or(Shl, Shr) and prepare all nodes.
  */
-static void lower_Rot(ir_node *node, ir_mode *mode, lower_env_t *env) {
-       ir_node  *right = get_Rot_right(node);
-
-       if (get_mode_arithmetic(mode) == irma_twos_complement && is_Const(right)) {
-               tarval *tv = get_Const_tarval(right);
-
-               if (tarval_is_long(tv) &&
-                       get_tarval_long(tv) == get_mode_size_bits(mode)) {
-                       ir_node *left = get_Rot_left(node);
-                       ir_node *h, *l;
-                       int idx = get_irn_idx(left);
+static void prepare_links_and_handle_rotl(ir_node *node, void *env) {
+       lower_env_t *lenv = env;
+
+       if (is_Rotl(node)) {
+               ir_mode *mode = get_irn_op_mode(node);
+                       if (mode == lenv->params->high_signed ||
+                           mode == lenv->params->high_unsigned) {
+                               ir_node  *right = get_Rotl_right(node);
+                               ir_node  *left, *shl, *shr, *or, *block, *sub, *c;
+                               ir_mode  *omode, *rmode;
+                               ir_graph *irg;
+                               dbg_info *dbg;
+                               optimization_state_t state;
+
+                               if (get_mode_arithmetic(mode) == irma_twos_complement && is_Const(right)) {
+                                       tarval *tv = get_Const_tarval(right);
+
+                                       if (tarval_is_long(tv) &&
+                                           get_tarval_long(tv) == (long)get_mode_size_bits(mode)) {
+                                               /* will be optimized in lower_Rotl() */
+                                               return;
+                                       }
+                               }
 
-                       l = env->entries[idx]->low_word;
-                       h = env->entries[idx]->high_word;
-                       idx = get_irn_idx(node);
+                               /* replace the Rotl(x,y) by an Or(Shl(x,y), Shr(x,64-y)) and lower those */
+                               dbg   = get_irn_dbg_info(node);
+                               omode = get_irn_mode(node);
+                               left  = get_Rotl_left(node);
+                               irg   = current_ir_graph;
+                               block = get_nodes_block(node);
+                               shl   = new_rd_Shl(dbg, irg, block, left, right, omode);
+                               rmode = get_irn_mode(right);
+                               c     = new_Const_long(rmode, get_mode_size_bits(omode));
+                               sub   = new_rd_Sub(dbg, irg, block, c, right, rmode);
+                               shr   = new_rd_Shr(dbg, irg, block, left, sub, omode);
+
+                               /* optimization must be switched off here, or we will get the Rotl back */
+                               save_optimization_state(&state);
+                               set_opt_algebraic_simplification(0);
+                               or = new_rd_Or(dbg, irg, block, shl, shr, omode);
+                               restore_optimization_state(&state);
+
+                               exchange(node, or);
+
+                               /* do lowering on the new nodes */
+                               prepare_links(shl, env);
+                               prepare_links(c, env);
+                               prepare_links(sub, env);
+                               prepare_links(shr, env);
+                               prepare_links(or, env);
+                       }
+       } else {
+               prepare_links(node, env);
+       }
+}
 
-                       env->entries[idx]->low_word  = h;
-                       env->entries[idx]->high_word = l;
+/**
+ * Translate a special case Rotl(x, sizeof(w)).
+ */
+static void lower_Rotl(ir_node *node, ir_mode *mode, lower_env_t *env) {
+       ir_node *right = get_Rotl_right(node);
+       ir_node *left = get_Rotl_left(node);
+       ir_node *h, *l;
+       int idx = get_irn_idx(left);
+       (void) right;
+       (void) mode;
+
+       assert(get_mode_arithmetic(mode) == irma_twos_complement &&
+              is_Const(right) && tarval_is_long(get_Const_tarval(right)) &&
+              get_tarval_long(get_Const_tarval(right)) == (long)get_mode_size_bits(mode));
+
+       l = env->entries[idx]->low_word;
+       h = env->entries[idx]->high_word;
+       idx = get_irn_idx(node);
 
-                       return;
-               }
-       }
-       lower_Shiftop(node, mode, env);
-}  /* lower_Rot */
+       env->entries[idx]->low_word  = h;
+       env->entries[idx]->high_word = l;
+}  /* lower_Rotl */
 
 /**
  * Translate an Unop.
@@ -1064,7 +1126,7 @@ static void lower_Unop(ir_node *node, ir_mode *mode, lower_env_t *env) {
                /* not ready yet, wait */
                pdeq_putr(env->waitq, node);
                return;
-       }
+       }  /* if */
 
        in[0] = entry->low_word;
        in[1] = entry->high_word;
@@ -1082,8 +1144,8 @@ static void lower_Unop(ir_node *node, ir_mode *mode, lower_env_t *env) {
 
        idx = get_irn_idx(node);
        assert(idx < env->n_entries);
-       env->entries[idx]->low_word  = new_r_Proj(irg, block, irn, mode, 0);
-       env->entries[idx]->high_word = new_r_Proj(irg, block, irn, mode, 1);
+       env->entries[idx]->low_word  = new_r_Proj(irg, block, irn, env->params->low_unsigned, 0);
+       env->entries[idx]->high_word = new_r_Proj(irg, block, irn, mode,                      1);
 }  /* lower_Unop */
 
 /**
@@ -1108,7 +1170,7 @@ static void lower_Binop_logical(ir_node *node, ir_mode *mode, lower_env_t *env,
                /* not ready yet, wait */
                pdeq_putr(env->waitq, node);
                return;
-       }
+       }  /* if */
 
        lop_l = entry->low_word;
        lop_h = entry->high_word;
@@ -1121,7 +1183,7 @@ static void lower_Binop_logical(ir_node *node, ir_mode *mode, lower_env_t *env,
                /* not ready yet, wait */
                pdeq_putr(env->waitq, node);
                return;
-       }
+       }  /* if */
 
        rop_l = entry->low_word;
        rop_h = entry->high_word;
@@ -1132,11 +1194,11 @@ static void lower_Binop_logical(ir_node *node, ir_mode *mode, lower_env_t *env,
        idx = get_irn_idx(node);
        assert(idx < env->n_entries);
        irg = current_ir_graph;
-       env->entries[idx]->low_word  = constr_rd(dbg, irg, block, lop_l, rop_l, mode);
+       env->entries[idx]->low_word  = constr_rd(dbg, irg, block, lop_l, rop_l, env->params->low_unsigned);
        env->entries[idx]->high_word = constr_rd(dbg, irg, block, lop_h, rop_h, mode);
 }  /* lower_Binop_logical */
 
-/** create a logical operation tranformation */
+/** create a logical operation transformation */
 #define lower_logical(op)                                                \
 static void lower_##op(ir_node *node, ir_mode *mode, lower_env_t *env) { \
        lower_Binop_logical(node, mode, env, new_rd_##op);                   \
@@ -1167,7 +1229,7 @@ static void lower_Not(ir_node *node, ir_mode *mode, lower_env_t *env) {
                /* not ready yet, wait */
                pdeq_putr(env->waitq, node);
                return;
-       }
+       }  /* if */
 
        op_l = entry->low_word;
        op_h = entry->high_word;
@@ -1178,7 +1240,7 @@ static void lower_Not(ir_node *node, ir_mode *mode, lower_env_t *env) {
 
        idx = get_irn_idx(node);
        assert(idx < env->n_entries);
-       env->entries[idx]->low_word  = new_rd_Not(dbg, current_ir_graph, block, op_l, mode);
+       env->entries[idx]->low_word  = new_rd_Not(dbg, current_ir_graph, block, op_l, env->params->low_unsigned);
        env->entries[idx]->high_word = new_rd_Not(dbg, current_ir_graph, block, op_h, mode);
 }  /* lower_Not */
 
@@ -1190,6 +1252,7 @@ static void lower_Cond(ir_node *node, ir_mode *mode, lower_env_t *env) {
        ir_node *sel = get_Cond_selector(node);
        ir_mode *m = get_irn_mode(sel);
        int     idx;
+       (void) mode;
 
        if (m == mode_b) {
                node_entry_t *lentry, *rentry;
@@ -1201,14 +1264,21 @@ static void lower_Cond(ir_node *node, ir_mode *mode, lower_env_t *env) {
                pn_Cmp   pnc;
                dbg_info *dbg;
 
+               if(!is_Proj(sel))
+                       return;
+
                cmp   = get_Proj_pred(sel);
+               if(!is_Cmp(cmp))
+                       return;
+
                left  = get_Cmp_left(cmp);
                idx   = get_irn_idx(left);
                lentry = env->entries[idx];
 
-               if (! lentry)
+               if (! lentry) {
                        /* a normal Cmp */
                        return;
+               }  /* if */
 
                right = get_Cmp_right(cmp);
                idx   = get_irn_idx(right);
@@ -1219,7 +1289,7 @@ static void lower_Cond(ir_node *node, ir_mode *mode, lower_env_t *env) {
                        /* not yet ready */
                        pdeq_putr(env->waitq, node);
                        return;
-               }
+               }  /* if */
 
                /* all right, build the code */
                for (proj = get_irn_link(node); proj; proj = get_irn_link(proj)) {
@@ -1228,24 +1298,38 @@ static void lower_Cond(ir_node *node, ir_mode *mode, lower_env_t *env) {
                        if (proj_nr == pn_Cond_true) {
                                assert(projT == NULL && "more than one Proj(true)");
                                projT = proj;
-                       }
-                       else {
+                       } else {
                                assert(proj_nr == pn_Cond_false);
                                assert(projF == NULL && "more than one Proj(false)");
                                projF = proj;
-                       }
+                       }  /* if */
                        mark_irn_visited(proj);
-               }
+               }  /* for */
                assert(projT && projF);
 
                /* create a new high compare */
-               block = get_nodes_block(cmp);
+               block = get_nodes_block(node);
                dbg   = get_irn_dbg_info(cmp);
                irg   = current_ir_graph;
+               pnc   = get_Proj_proj(sel);
+
+               if (is_Const(right) && is_Const_null(right)) {
+                       if (pnc == pn_Cmp_Eq || pnc == pn_Cmp_Lg) {
+                               /* x ==/!= 0 ==> or(low,high) ==/!= 0 */
+                               ir_mode *mode = env->params->low_unsigned;
+                               ir_node *low  = new_r_Conv(irg, block, lentry->low_word, mode);
+                               ir_node *high = new_r_Conv(irg, block, lentry->high_word, mode);
+                               ir_node *or   = new_rd_Or(dbg, irg, block, low, high, mode);
+                               ir_node *cmp  = new_rd_Cmp(dbg, irg, block, or, new_Const_long(mode, 0));
+
+                               ir_node *proj = new_r_Proj(irg, block, cmp, mode_b, pnc);
+                               set_Cond_selector(node, proj);
+                               return;
+                       }
+               }
 
                cmpH = new_rd_Cmp(dbg, irg, block, lentry->high_word, rentry->high_word);
 
-               pnc = get_Proj_proj(sel);
                if (pnc == pn_Cmp_Eq) {
                        /* simple case:a == b <==> a_h == b_h && a_l == b_l */
                        pmap_entry *entry = pmap_find(env->proj_2_block, projF);
@@ -1279,8 +1363,7 @@ static void lower_Cond(ir_node *node, ir_mode *mode, lower_env_t *env) {
                        proj = new_r_Proj(irg, new_bl, irn, mode_X, pn_Cond_true);
                        mark_irn_visited(proj);
                        exchange(projT, proj);
-               }
-               else if (pnc == pn_Cmp_Lg) {
+               } else if (pnc == pn_Cmp_Lg) {
                        /* simple case:a != b <==> a_h != b_h || a_l != b_l */
                        pmap_entry *entry = pmap_find(env->proj_2_block, projT);
 
@@ -1313,9 +1396,8 @@ static void lower_Cond(ir_node *node, ir_mode *mode, lower_env_t *env) {
                        proj = new_r_Proj(irg, new_bl, irn, mode_X, pn_Cond_false);
                        mark_irn_visited(proj);
                        exchange(projF, proj);
-               }
-               else {
-                       /* a rel b <==> a_h rel b_h || (a_h == b_h && a_l rel b_l) */
+               } else {
+                       /* a rel b <==> a_h REL b_h || (a_h == b_h && a_l rel b_l) */
                        ir_node *dstT, *dstF, *newbl_eq, *newbl_l;
                        pmap_entry *entry;
 
@@ -1327,7 +1409,7 @@ static void lower_Cond(ir_node *node, ir_mode *mode, lower_env_t *env) {
                        assert(entry);
                        dstF = entry->value;
 
-                       irn = new_r_Proj(irg, block, cmpH, mode_b, pnc);
+                       irn = new_r_Proj(irg, block, cmpH, mode_b, pnc & ~pn_Cmp_Eq);
                        dbg = get_irn_dbg_info(node);
                        irn = new_rd_Cond(dbg, irg, block, irn);
 
@@ -1367,12 +1449,11 @@ static void lower_Cond(ir_node *node, ir_mode *mode, lower_env_t *env) {
                        proj = new_r_Proj(irg, newbl_l, irn, mode_X, pn_Cond_false);
                        mark_irn_visited(proj);
                        add_block_cf_input(dstF, projF, proj);
-               }
+               }  /* if */
 
                /* we have changed the control flow */
                env->flags |= CF_CHANGED;
-       }
-       else {
+       } else {
                idx = get_irn_idx(sel);
 
                if (env->entries[idx]) {
@@ -1387,10 +1468,10 @@ static void lower_Cond(ir_node *node, ir_mode *mode, lower_env_t *env) {
                                /* not ready yet, wait */
                                pdeq_putr(env->waitq, node);
                                return;
-                       }
+                       }  /* if */
                        set_Cond_selector(node, env->entries[idx]->low_word);
-               }
-       }
+               }  /* if */
+       }  /* if */
 }  /* lower_Cond */
 
 /**
@@ -1399,7 +1480,8 @@ static void lower_Cond(ir_node *node, ir_mode *mode, lower_env_t *env) {
 static void lower_Conv_to_Ls(ir_node *node, lower_env_t *env) {
        ir_node  *op    = get_Conv_op(node);
        ir_mode  *imode = get_irn_mode(op);
-       ir_mode  *dst_mode = env->params->low_signed;
+       ir_mode  *dst_mode_l = env->params->low_unsigned;
+       ir_mode  *dst_mode_h = env->params->low_signed;
        int      idx = get_irn_idx(node);
        ir_graph *irg = current_ir_graph;
        ir_node  *block = get_nodes_block(node);
@@ -1408,15 +1490,33 @@ static void lower_Conv_to_Ls(ir_node *node, lower_env_t *env) {
        assert(idx < env->n_entries);
 
        if (mode_is_int(imode) || mode_is_reference(imode)) {
-               /* simple case: create a high word */
-               if (imode != dst_mode)
-                       op = new_rd_Conv(dbg, irg, block, op, dst_mode);
+               if (imode == env->params->high_unsigned) {
+                       /* a Conv from Lu to Ls */
+                       int op_idx = get_irn_idx(op);
 
-               env->entries[idx]->low_word  = op;
-               env->entries[idx]->high_word = new_rd_Shrs(dbg, irg, block, op,
-                       new_Const_long(mode_Iu, get_mode_size_bits(dst_mode) - 1), dst_mode);
-       }
-       else {
+                       if (! env->entries[op_idx]->low_word) {
+                               /* not ready yet, wait */
+                               pdeq_putr(env->waitq, node);
+                               return;
+                       }  /* if */
+                       env->entries[idx]->low_word  = new_rd_Conv(dbg, irg, block, env->entries[op_idx]->low_word,  dst_mode_l);
+                       env->entries[idx]->high_word = new_rd_Conv(dbg, irg, block, env->entries[op_idx]->high_word, dst_mode_h);
+               } else {
+                       /* simple case: create a high word */
+                       if (imode != dst_mode_l)
+                               op = new_rd_Conv(dbg, irg, block, op, dst_mode_l);
+
+                       env->entries[idx]->low_word  = op;
+
+                       if (mode_is_signed(imode)) {
+                               ir_node *op_conv = new_rd_Conv(dbg, irg, block, op, dst_mode_h);
+                               env->entries[idx]->high_word = new_rd_Shrs(dbg, irg, block, op_conv,
+                                       new_Const_long(dst_mode_l, get_mode_size_bits(dst_mode_h) - 1), dst_mode_h);
+                       } else {
+                               env->entries[idx]->high_word = new_Const(get_mode_null(dst_mode_h));
+                       }  /* if */
+               }  /* if */
+       } else {
                ir_node *irn, *call;
                ir_mode *omode = env->params->high_signed;
                ir_type *mtp = get_conv_type(imode, omode, env);
@@ -1426,9 +1526,9 @@ static void lower_Conv_to_Ls(ir_node *node, lower_env_t *env) {
                set_irn_pinned(call, get_irn_pinned(node));
                irn = new_r_Proj(irg, block, call, mode_T, pn_Call_T_result);
 
-               env->entries[idx]->low_word  = new_r_Proj(irg, block, irn, dst_mode, 0);
-               env->entries[idx]->high_word = new_r_Proj(irg, block, irn, dst_mode, 1);
-       }
+               env->entries[idx]->low_word  = new_r_Proj(irg, block, irn, dst_mode_l, 0);
+               env->entries[idx]->high_word = new_r_Proj(irg, block, irn, dst_mode_h, 1);
+       }  /* if */
 }  /* lower_Conv_to_Ls */
 
 /**
@@ -1436,7 +1536,7 @@ static void lower_Conv_to_Ls(ir_node *node, lower_env_t *env) {
  */
 static void lower_Conv_to_Lu(ir_node *node, lower_env_t *env) {
        ir_node  *op    = get_Conv_op(node);
-       ir_mode  *imode  = get_irn_mode(op);
+       ir_mode  *imode = get_irn_mode(op);
        ir_mode  *dst_mode = env->params->low_unsigned;
        int      idx = get_irn_idx(node);
        ir_graph *irg = current_ir_graph;
@@ -1446,18 +1546,37 @@ static void lower_Conv_to_Lu(ir_node *node, lower_env_t *env) {
        assert(idx < env->n_entries);
 
        if (mode_is_int(imode) || mode_is_reference(imode)) {
-               /* simple case: create a high word */
-               if (imode != dst_mode)
-                       op = new_rd_Conv(dbg, irg, block, op, dst_mode);
+               if (imode == env->params->high_signed) {
+                       /* a Conv from Ls to Lu */
+                       int op_idx = get_irn_idx(op);
 
-               env->entries[idx]->low_word  = op;
-               env->entries[idx]->high_word = new_Const(dst_mode, get_mode_null(dst_mode));
-       }
-       else {
+                       if (! env->entries[op_idx]->low_word) {
+                               /* not ready yet, wait */
+                               pdeq_putr(env->waitq, node);
+                               return;
+                       }  /* if */
+                       env->entries[idx]->low_word  = new_rd_Conv(dbg, irg, block, env->entries[op_idx]->low_word, dst_mode);
+                       env->entries[idx]->high_word = new_rd_Conv(dbg, irg, block, env->entries[op_idx]->high_word, dst_mode);
+               } else {
+                       /* simple case: create a high word */
+                       if (imode != dst_mode)
+                               op = new_rd_Conv(dbg, irg, block, op, dst_mode);
+
+                       env->entries[idx]->low_word  = op;
+
+                       if (mode_is_signed(imode)) {
+                               env->entries[idx]->high_word = new_rd_Shrs(dbg, irg, block, op,
+                                       new_Const_long(dst_mode, get_mode_size_bits(dst_mode) - 1), dst_mode);
+                       } else {
+                               env->entries[idx]->high_word = new_Const(get_mode_null(dst_mode));
+                       }  /* if */
+               }  /* if */
+       } else {
                ir_node *irn, *call;
                ir_mode *omode = env->params->high_unsigned;
                ir_type *mtp = get_conv_type(imode, omode, env);
 
+               /* do an intrinsic call */
                irn = get_intrinsic_address(mtp, get_irn_op(node), imode, omode, block, env);
                call = new_rd_Call(dbg, irg, block, get_irg_no_mem(irg), irn, 1, &op, mtp);
                set_irn_pinned(call, get_irn_pinned(node));
@@ -1465,7 +1584,7 @@ static void lower_Conv_to_Lu(ir_node *node, lower_env_t *env) {
 
                env->entries[idx]->low_word  = new_r_Proj(irg, block, irn, dst_mode, 0);
                env->entries[idx]->high_word = new_r_Proj(irg, block, irn, dst_mode, 1);
-       }
+       }  /* if */
 }  /* lower_Conv_to_Lu */
 
 /**
@@ -1481,6 +1600,12 @@ static void lower_Conv_from_Ls(ir_node *node, lower_env_t *env) {
 
        assert(idx < env->n_entries);
 
+       if (! env->entries[idx]->low_word) {
+               /* not ready yet, wait */
+               pdeq_putr(env->waitq, node);
+               return;
+       }  /* if */
+
        if (mode_is_int(omode) || mode_is_reference(omode)) {
                op = env->entries[idx]->low_word;
 
@@ -1489,8 +1614,7 @@ static void lower_Conv_from_Ls(ir_node *node, lower_env_t *env) {
                        op = new_rd_Conv(dbg, irg, block, op, omode);
 
                set_Conv_op(node, op);
-       }
-       else {
+       } else {
                ir_node *irn, *call, *in[2];
                ir_mode *imode = env->params->high_signed;
                ir_type *mtp = get_conv_type(imode, omode, env);
@@ -1504,7 +1628,7 @@ static void lower_Conv_from_Ls(ir_node *node, lower_env_t *env) {
                irn = new_r_Proj(irg, block, call, mode_T, pn_Call_T_result);
 
                exchange(node, new_r_Proj(irg, block, irn, omode, 0));
-       }
+       }  /* if */
 }  /* lower_Conv_from_Ls */
 
 /**
@@ -1520,6 +1644,12 @@ static void lower_Conv_from_Lu(ir_node *node, lower_env_t *env) {
 
        assert(idx < env->n_entries);
 
+       if (! env->entries[idx]->low_word) {
+               /* not ready yet, wait */
+               pdeq_putr(env->waitq, node);
+               return;
+       }  /* if */
+
        if (mode_is_int(omode) || mode_is_reference(omode)) {
                op = env->entries[idx]->low_word;
 
@@ -1528,8 +1658,7 @@ static void lower_Conv_from_Lu(ir_node *node, lower_env_t *env) {
                        op = new_rd_Conv(dbg, irg, block, op, omode);
 
                set_Conv_op(node, op);
-       }
-       else {
+       } else {
                ir_node *irn, *call, *in[2];
                ir_mode *imode = env->params->high_unsigned;
                ir_type *mtp = get_conv_type(imode, omode, env);
@@ -1543,7 +1672,7 @@ static void lower_Conv_from_Lu(ir_node *node, lower_env_t *env) {
                irn = new_r_Proj(irg, block, call, mode_T, pn_Call_T_result);
 
                exchange(node, new_r_Proj(irg, block, irn, omode, 0));
-       }
+       }  /* if */
 }  /* lower_Conv_from_Lu */
 
 /**
@@ -1552,29 +1681,33 @@ static void lower_Conv_from_Lu(ir_node *node, lower_env_t *env) {
 static void lower_Conv(ir_node *node, ir_mode *mode, lower_env_t *env) {
        mode = get_irn_mode(node);
 
-       if (mode == env->params->high_signed)
+       if (mode == env->params->high_signed) {
                lower_Conv_to_Ls(node, env);
-       else if (mode == env->params->high_unsigned)
+       } else if (mode == env->params->high_unsigned) {
                lower_Conv_to_Lu(node, env);
-       else {
+       else {
                ir_mode *mode = get_irn_mode(get_Conv_op(node));
 
-               if (mode == env->params->high_signed)
+               if (mode == env->params->high_signed) {
                        lower_Conv_from_Ls(node, env);
-               else {
-                       assert(mode == env->params->high_unsigned);
+               } else if (mode == env->params->high_unsigned) {
                        lower_Conv_from_Lu(node, env);
-               }
-       }
+               }  /* if */
+       }  /* if */
 }  /* lower_Conv */
 
 /**
  * Lower the method type.
+ *
+ * @param mtp  the method type to lower
+ * @param ent  the lower environment
+ *
+ * @return the lowered type
  */
 static ir_type *lower_mtp(ir_type *mtp, lower_env_t *env) {
        pmap_entry *entry;
-       ident      *id;
-       ir_type    *res;
+       ident      *id, *lid;
+       ir_type    *res, *value_type;
 
        if (is_lowered_type(mtp))
                return mtp;
@@ -1594,8 +1727,8 @@ static ir_type *lower_mtp(ir_type *mtp, lower_env_t *env) {
                                if (mode == env->params->high_signed ||
                                        mode == env->params->high_unsigned)
                                        ++n_param;
-                       }
-               }
+                       }  /* if */
+               }  /* for */
 
                /* count new number of results */
                n_res = r = get_method_n_ress(mtp);
@@ -1608,10 +1741,10 @@ static ir_type *lower_mtp(ir_type *mtp, lower_env_t *env) {
                                if (mode == env->params->high_signed ||
                                        mode == env->params->high_unsigned)
                                        ++n_res;
-                       }
-               }
+                       }  /* if */
+               }  /* for */
 
-               id mangle_u(new_id_from_chars("L", 1), get_type_ident(mtp));
+               id  = id_mangle_u(new_id_from_chars("L", 1), get_type_ident(mtp));
                res = new_type_method(id, n_param, n_res);
 
                /* set param types and result types */
@@ -1622,19 +1755,18 @@ static ir_type *lower_mtp(ir_type *mtp, lower_env_t *env) {
                                ir_mode *mode = get_type_mode(tp);
 
                                if (mode == env->params->high_signed) {
+                                       set_method_param_type(res, n_param++, tp_u);
                                        set_method_param_type(res, n_param++, tp_s);
-                                       set_method_param_type(res, n_param++, tp_s);
-                               }
-                               else if (mode == env->params->high_unsigned) {
+                               } else if (mode == env->params->high_unsigned) {
                                        set_method_param_type(res, n_param++, tp_u);
                                        set_method_param_type(res, n_param++, tp_u);
-                               }
-                               else
+                               } else {
                                        set_method_param_type(res, n_param++, tp);
-                       }
-                       else
+                               }  /* if */
+                       } else {
                                set_method_param_type(res, n_param++, tp);
-               }
+                       }  /* if */
+               }  /* for */
                for (i = n_res = 0; i < r; ++i) {
                        ir_type *tp = get_method_res_type(mtp, i);
 
@@ -1642,24 +1774,61 @@ static ir_type *lower_mtp(ir_type *mtp, lower_env_t *env) {
                                ir_mode *mode = get_type_mode(tp);
 
                                if (mode == env->params->high_signed) {
+                                       set_method_res_type(res, n_res++, tp_u);
                                        set_method_res_type(res, n_res++, tp_s);
-                                       set_method_res_type(res, n_res++, tp_s);
-                               }
-                               else if (mode == env->params->high_unsigned) {
+                               } else if (mode == env->params->high_unsigned) {
                                        set_method_res_type(res, n_res++, tp_u);
                                        set_method_res_type(res, n_res++, tp_u);
-                               }
-                               else
+                               } else {
                                        set_method_res_type(res, n_res++, tp);
-                       }
-                       else
+                               }  /* if */
+                       } else {
                                set_method_res_type(res, n_res++, tp);
-               }
+                       }  /* if */
+               }  /* for */
                set_lowered_type(mtp, res);
                pmap_insert(lowered_type, mtp, res);
-       }
-       else
+
+               value_type = get_method_value_param_type(mtp);
+               if (value_type != NULL) {
+                       /* this creates a new value parameter type */
+                       (void)get_method_value_param_ent(res, 0);
+
+                       /* set new param positions */
+                       for (i = n_param = 0; i < n; ++i) {
+                               ir_type   *tp  = get_method_param_type(mtp, i);
+                               ident     *id  = get_method_param_ident(mtp, i);
+                               ir_entity *ent = get_method_value_param_ent(mtp, i);
+
+                               set_entity_link(ent, INT_TO_PTR(n_param));
+                               if (is_Primitive_type(tp)) {
+                                       ir_mode *mode = get_type_mode(tp);
+
+                                       if (mode == env->params->high_signed || mode == env->params->high_unsigned) {
+                                               if (id != NULL) {
+                                                       lid = id_mangle(id, env->first_id);
+                                                       set_method_param_ident(res, n_param, lid);
+                                                       set_entity_ident(get_method_value_param_ent(res, n_param), lid);
+                                                       lid = id_mangle(id, env->next_id);
+                                                       set_method_param_ident(res, n_param + 1, lid);
+                                                       set_entity_ident(get_method_value_param_ent(res, n_param + 1), lid);
+                                               }  /* if */
+                                               n_param += 2;
+                                               continue;
+                                       }  /* if */
+                               }  /* if */
+                               if (id != NULL) {
+                                       set_method_param_ident(res, n_param, id);
+                                       set_entity_ident(get_method_value_param_ent(res, n_param), id);
+                               }  /* if */
+                               ++n_param;
+                       }  /* for */
+
+                       set_lowered_type(value_type, get_method_value_param_type(res));
+               }  /* if */
+       } else {
                res = entry->value;
+       }  /* if */
        return res;
 }  /* lower_mtp */
 
@@ -1667,12 +1836,13 @@ static ir_type *lower_mtp(ir_type *mtp, lower_env_t *env) {
  * Translate a Return.
  */
 static void lower_Return(ir_node *node, ir_mode *mode, lower_env_t *env) {
-       ir_graph *irg = current_ir_graph;
-       entity   *ent = get_irg_entity(irg);
-       ir_type  *mtp = get_entity_type(ent);
-       ir_node  **in;
-       int      i, j, n, idx;
-       int      need_conv = 0;
+       ir_graph  *irg = current_ir_graph;
+       ir_entity *ent = get_irg_entity(irg);
+       ir_type   *mtp = get_entity_type(ent);
+       ir_node   **in;
+       int       i, j, n, idx;
+       int       need_conv = 0;
+       (void) mode;
 
        /* check if this return must be lowered */
        for (i = 0, n = get_Return_n_ress(node); i < n; ++i) {
@@ -1686,10 +1856,10 @@ static void lower_Return(ir_node *node, ir_mode *mode, lower_env_t *env) {
                                /* not ready yet, wait */
                                pdeq_putr(env->waitq, node);
                                return;
-                       }
+                       }  /* if */
                        need_conv = 1;
-               }
-       }
+               }  /* if */
+       }  /* for */
        if (! need_conv)
                return;
 
@@ -1712,10 +1882,10 @@ static void lower_Return(ir_node *node, ir_mode *mode, lower_env_t *env) {
                if (env->entries[idx]) {
                        in[++j] = env->entries[idx]->low_word;
                        in[++j] = env->entries[idx]->high_word;
-               }
-               else
+               } else {
                        in[++j] = pred;
-       }
+               }  /* if */
+       }  /* for */
 
        set_irn_in(node, j+1, in);
 }  /* lower_Return */
@@ -1724,19 +1894,20 @@ static void lower_Return(ir_node *node, ir_mode *mode, lower_env_t *env) {
  * Translate the parameters.
  */
 static void lower_Start(ir_node *node, ir_mode *mode, lower_env_t *env) {
-       ir_graph *irg = current_ir_graph;
-       entity   *ent = get_irg_entity(irg);
-       ir_type  *tp  = get_entity_type(ent);
-       ir_type  *mtp;
-       long     *new_projs;
-       int      i, j, n_params, rem;
-       ir_node  *proj, *args;
-
-       if (is_lowered_type(tp))
+       ir_graph  *irg = current_ir_graph;
+       ir_entity *ent = get_irg_entity(irg);
+       ir_type   *tp  = get_entity_type(ent);
+       ir_type   *mtp;
+       long      *new_projs;
+       int       i, j, n_params, rem;
+       ir_node   *proj, *args;
+       (void) mode;
+
+       if (is_lowered_type(tp)) {
                mtp = get_associated_type(tp);
-       else
+       } else {
                mtp = tp;
-
+       }  /* if */
        assert(! is_lowered_type(mtp));
 
        n_params = get_method_n_params(mtp);
@@ -1756,8 +1927,8 @@ static void lower_Start(ir_node *node, ir_mode *mode, lower_env_t *env) {
                        if (mode == env->params->high_signed ||
                                mode == env->params->high_unsigned)
                                ++j;
-               }
-       }
+               }  /* if */
+       }  /* for */
        if (i == j)
                return;
 
@@ -1789,20 +1960,23 @@ static void lower_Start(ir_node *node, ir_mode *mode, lower_env_t *env) {
 
                idx = get_irn_idx(proj);
                if (env->entries[idx]) {
+                       ir_mode *low_mode = env->params->low_unsigned;
+
                        mode = get_irn_mode(proj);
 
-                       if (mode == env->params->high_signed)
+                       if (mode == env->params->high_signed) {
                                mode = env->params->low_signed;
-                       else
+                       } else {
                                mode = env->params->low_unsigned;
+                       }  /* if */
 
                        dbg = get_irn_dbg_info(proj);
                        env->entries[idx]->low_word  =
-                               new_rd_Proj(dbg, irg, get_nodes_block(proj), args, mode, new_projs[proj_nr]);
+                               new_rd_Proj(dbg, irg, get_nodes_block(proj), args, low_mode, new_projs[proj_nr]);
                        env->entries[idx]->high_word =
                                new_rd_Proj(dbg, irg, get_nodes_block(proj), args, mode, new_projs[proj_nr] + 1);
-               }
-       }
+               }  /* if */
+       }  /* for */
        set_optimize(rem);
 }  /* lower_Start */
 
@@ -1817,11 +1991,13 @@ static void lower_Call(ir_node *node, ir_mode *mode, lower_env_t *env) {
        int      n_params, n_res, need_lower = 0;
        int      i, j;
        long     *res_numbers = NULL;
+       (void) mode;
 
-       if (is_lowered_type(tp))
+       if (is_lowered_type(tp)) {
                call_tp = get_associated_type(tp);
-       else
+       } else {
                call_tp = tp;
+       }  /* if */
 
        assert(! is_lowered_type(call_tp));
 
@@ -1836,9 +2012,9 @@ static void lower_Call(ir_node *node, ir_mode *mode, lower_env_t *env) {
                                mode == env->params->high_unsigned) {
                                need_lower = 1;
                                break;
-                       }
-               }
-       }
+                       }  /* if */
+               }  /* if */
+       }  /* for */
        n_res = get_method_n_ress(call_tp);
        if (n_res > 0) {
                NEW_ARR_A(long, res_numbers, n_res);
@@ -1854,10 +2030,10 @@ static void lower_Call(ir_node *node, ir_mode *mode, lower_env_t *env) {
                                        mode == env->params->high_unsigned) {
                                        need_lower = 1;
                                        ++j;
-                               }
-                       }
-               }
-       }
+                               }  /* if */
+                       }  /* if */
+               }  /* for */
+       }  /* if */
 
        if (! need_lower)
                return;
@@ -1883,10 +2059,10 @@ static void lower_Call(ir_node *node, ir_mode *mode, lower_env_t *env) {
                        }
                        in[j++] = env->entries[idx]->low_word;
                        in[j++] = env->entries[idx]->high_word;
-               }
-               else
+               } else {
                        in[j++] = pred;
-       }
+               }  /* if */
+       }  /* for */
 
        set_irn_in(node, j, in);
 
@@ -1899,8 +2075,8 @@ static void lower_Call(ir_node *node, ir_mode *mode, lower_env_t *env) {
                        /* found the result proj */
                        results = proj;
                        break;
-               }
-       }
+               }  /* if */
+       }  /* for */
 
        if (results) {          /* there are results */
                int rem = get_optimize();
@@ -1918,22 +2094,24 @@ static void lower_Call(ir_node *node, ir_mode *mode, lower_env_t *env) {
                                idx = get_irn_idx(proj);
                                if (env->entries[idx]) {
                                        ir_mode *mode = get_irn_mode(proj);
+                                       ir_mode *low_mode = env->params->low_unsigned;
                                        dbg_info *dbg;
 
-                                       if (mode == env->params->high_signed)
+                                       if (mode == env->params->high_signed) {
                                                mode = env->params->low_signed;
-                                       else
+                                       } else {
                                                mode = env->params->low_unsigned;
+                                       }  /* if */
 
                                        dbg = get_irn_dbg_info(proj);
                                        env->entries[idx]->low_word  =
-                                               new_rd_Proj(dbg, irg, get_nodes_block(proj), results, mode, res_numbers[proj_nr]);
+                                               new_rd_Proj(dbg, irg, get_nodes_block(proj), results, low_mode, res_numbers[proj_nr]);
                                        env->entries[idx]->high_word =
                                                new_rd_Proj(dbg, irg, get_nodes_block(proj), results, mode, res_numbers[proj_nr] + 1);
-                               }
+                               }  /* if */
                                mark_irn_visited(proj);
-                       }
-               }
+                       }  /* if */
+               }  /* for */
                set_optimize(rem);
        }
 }  /* lower_Call */
@@ -1942,10 +2120,11 @@ static void lower_Call(ir_node *node, ir_mode *mode, lower_env_t *env) {
  * Translate an Unknown into two.
  */
 static void lower_Unknown(ir_node *node, ir_mode *mode, lower_env_t *env) {
-       int idx = get_irn_idx(node);
+       int      idx = get_irn_idx(node);
        ir_graph *irg = current_ir_graph;
+       ir_mode  *low_mode = env->params->low_unsigned;
 
-       env->entries[idx]->low_word  =
+       env->entries[idx]->low_word  = new_r_Unknown(irg, low_mode);
        env->entries[idx]->high_word = new_r_Unknown(irg, mode);
 }  /* lower_Unknown */
 
@@ -1955,8 +2134,9 @@ static void lower_Unknown(ir_node *node, ir_mode *mode, lower_env_t *env) {
  * First step: just create two templates
  */
 static void lower_Phi(ir_node *phi, ir_mode *mode, lower_env_t *env) {
+       ir_mode  *mode_l = env->params->low_unsigned;
        ir_graph *irg = current_ir_graph;
-       ir_node  *block, *unk;
+       ir_node  *block, *unk_l, *unk_h, *phi_l, *phi_h;
        ir_node  **inl, **inh;
        dbg_info *dbg;
        int      idx, i, arity = get_Phi_n_preds(phi);
@@ -1975,19 +2155,19 @@ static void lower_Phi(ir_node *phi, ir_mode *mode, lower_env_t *env) {
                        if (env->entries[idx]->low_word) {
                                set_Phi_pred(phil, i, env->entries[idx]->low_word);
                                set_Phi_pred(phih, i, env->entries[idx]->high_word);
-                       }
-                       else {
+                       } else {
                                /* still not ready */
                                pdeq_putr(env->waitq, phi);
                                return;
-                       }
-               }
-       }
+                       }  /* if */
+               }  /* for */
+       }  /* if */
 
        /* first create a new in array */
        NEW_ARR_A(ir_node *, inl, arity);
        NEW_ARR_A(ir_node *, inh, arity);
-       unk = new_r_Unknown(irg, mode);
+       unk_l = new_r_Unknown(irg, mode_l);
+       unk_h = new_r_Unknown(irg, mode);
 
        for (i = 0; i < arity; ++i) {
                ir_node *pred = get_Phi_pred(phi, i);
@@ -1996,44 +2176,214 @@ static void lower_Phi(ir_node *phi, ir_mode *mode, lower_env_t *env) {
                if (env->entries[idx]->low_word) {
                        inl[i] = env->entries[idx]->low_word;
                        inh[i] = env->entries[idx]->high_word;
-               }
-               else {
-                       inl[i] = unk;
-                       inh[i] = unk;
+               } else {
+                       inl[i] = unk_l;
+                       inh[i] = unk_h;
                        enq = 1;
-               }
-       }
+               }  /* if */
+       }  /* for */
 
-       dbg = get_irn_dbg_info(phi);
+       dbg   = get_irn_dbg_info(phi);
        block = get_nodes_block(phi);
 
        idx = get_irn_idx(phi);
        assert(idx < env->n_entries);
-       env->entries[idx]->low_word  = new_rd_Phi(dbg, irg, block, arity, inl, mode);
-       env->entries[idx]->high_word = new_rd_Phi(dbg, irg, block, arity, inh, mode);
+       env->entries[idx]->low_word  = phi_l = new_rd_Phi(dbg, irg, block, arity, inl, mode_l);
+       env->entries[idx]->high_word = phi_h = new_rd_Phi(dbg, irg, block, arity, inh, mode);
+
+       /* Don't forget to link the new Phi nodes into the block.
+        * Beware that some Phis might be optimized away. */
+       if (is_Phi(phi_l))
+               add_Block_phi(block, phi_l);
+       if (is_Phi(phi_h))
+               add_Block_phi(block, phi_h);
 
        if (enq) {
                /* not yet finished */
                pdeq_putr(env->waitq, phi);
-       }
+       }  /* if */
 }  /* lower_Phi */
 
+/**
+ * Translate a Mux.
+ */
+static void lower_Mux(ir_node *mux, ir_mode *mode, lower_env_t *env) {
+       ir_graph *irg = current_ir_graph;
+       ir_node  *block, *val;
+       ir_node  *true_l, *true_h, *false_l, *false_h, *sel;
+       dbg_info *dbg;
+       int      idx;
+
+       val = get_Mux_true(mux);
+       idx = get_irn_idx(val);
+       if (env->entries[idx]->low_word) {
+               /* Values already build */
+               true_l = env->entries[idx]->low_word;
+               true_h = env->entries[idx]->high_word;
+       } else {
+               /* still not ready */
+               pdeq_putr(env->waitq, mux);
+               return;
+       }  /* if */
+
+       val = get_Mux_false(mux);
+       idx = get_irn_idx(val);
+       if (env->entries[idx]->low_word) {
+               /* Values already build */
+               false_l = env->entries[idx]->low_word;
+               false_h = env->entries[idx]->high_word;
+       } else {
+               /* still not ready */
+               pdeq_putr(env->waitq, mux);
+               return;
+       }  /* if */
+
+
+       sel = get_Mux_sel(mux);
+
+       dbg   = get_irn_dbg_info(mux);
+       block = get_nodes_block(mux);
+
+       idx = get_irn_idx(mux);
+       assert(idx < env->n_entries);
+       env->entries[idx]->low_word  = new_rd_Mux(dbg, irg, block, sel, false_l, true_l, mode);
+       env->entries[idx]->high_word = new_rd_Mux(dbg, irg, block, sel, false_h, true_h, mode);
+}  /* lower_Mux */
+
+/**
+ * Translate an ASM node.
+ */
+static void lower_ASM(ir_node *asmn, ir_mode *mode, lower_env_t *env) {
+       ir_mode *his = env->params->high_signed;
+       ir_mode *hiu = env->params->high_unsigned;
+       int      i;
+       ir_node *n;
+
+       (void)mode;
+
+       for (i = get_irn_arity(asmn) - 1; i >= 0; --i) {
+               ir_mode *op_mode = get_irn_mode(get_irn_n(asmn, i));
+               if (op_mode == his || op_mode == hiu) {
+                       panic("lowering ASM unimplemented");
+               }  /* if */
+       }  /* for */
+
+       for (n = asmn;;) {
+               ir_mode *proj_mode;
+
+               n = get_irn_link(n);
+               if (n == NULL)
+                       break;
+
+               proj_mode = get_irn_mode(n);
+               if (proj_mode == his || proj_mode == hiu) {
+                       panic("lowering ASM unimplemented");
+               }  /* if */
+       }  /* for */
+}  /* lower_ASM */
+
+/**
+ * Translate a Sel node.
+ */
+static void lower_Sel(ir_node *sel, ir_mode *mode, lower_env_t *env) {
+       (void) mode;
+
+       /* we must only lower value parameter Sels if we change the
+          value parameter type. */
+       if (env->value_param_tp != NULL) {
+               ir_entity *ent = get_Sel_entity(sel);
+           if (get_entity_owner(ent) == env->value_param_tp) {
+                       int pos = PTR_TO_INT(get_entity_link(ent));
+
+                       ent = get_method_value_param_ent(env->l_mtp, pos);
+                       set_Sel_entity(sel, ent);
+               }  /* if */
+       }  /* if */
+}  /* lower_Sel */
+
 /**
  * check for opcodes that must always be lowered.
  */
-static int always_lower(opcode code) {
+static int always_lower(ir_opcode code) {
        switch (code) {
+       case iro_ASM:
+       case iro_Proj:
        case iro_Start:
        case iro_Call:
        case iro_Return:
        case iro_Cond:
+       case iro_Conv:
+       case iro_Sel:
                return 1;
        default:
                return 0;
-       }
+       }  /* switch */
 }  /* always_lower */
 
-/** The type of a lower function. */
+/**
+ * lower boolean Proj(Cmp)
+ */
+static ir_node *lower_boolean_Proj_Cmp(ir_node *proj, ir_node *cmp, lower_env_t *env) {
+       int      lidx, ridx;
+       ir_node  *l, *r, *low, *high, *t, *res;
+       pn_Cmp   pnc;
+       ir_node  *blk;
+       ir_graph *irg = current_ir_graph;
+       dbg_info *db;
+
+       l    = get_Cmp_left(cmp);
+       lidx = get_irn_idx(l);
+       if (! env->entries[lidx]->low_word) {
+               /* still not ready */
+               return NULL;
+       }  /* if */
+
+       r    = get_Cmp_right(cmp);
+       ridx = get_irn_idx(r);
+       if (! env->entries[ridx]->low_word) {
+               /* still not ready */
+               return NULL;
+       }  /* if */
+
+       pnc  = get_Proj_proj(proj);
+       blk  = get_nodes_block(cmp);
+       db   = get_irn_dbg_info(cmp);
+       low  = new_rd_Cmp(db, irg, blk, env->entries[lidx]->low_word, env->entries[ridx]->low_word);
+       high = new_rd_Cmp(db, irg, blk, env->entries[lidx]->high_word, env->entries[ridx]->high_word);
+
+       if (pnc == pn_Cmp_Eq) {
+               /* simple case:a == b <==> a_h == b_h && a_l == b_l */
+               res = new_rd_And(db, irg, blk,
+                       new_r_Proj(irg, blk, low, mode_b, pnc),
+                       new_r_Proj(irg, blk, high, mode_b, pnc),
+                       mode_b);
+       } else if (pnc == pn_Cmp_Lg) {
+               /* simple case:a != b <==> a_h != b_h || a_l != b_l */
+               res = new_rd_Or(db, irg, blk,
+                       new_r_Proj(irg, blk, low, mode_b, pnc),
+                       new_r_Proj(irg, blk, high, mode_b, pnc),
+                       mode_b);
+       } else {
+               /* a rel b <==> a_h REL b_h || (a_h == b_h && a_l rel b_l) */
+               t = new_rd_And(db, irg, blk,
+                       new_r_Proj(irg, blk, low, mode_b, pnc),
+                       new_r_Proj(irg, blk, high, mode_b, pn_Cmp_Eq),
+                       mode_b);
+               res = new_rd_Or(db, irg, blk,
+                       new_r_Proj(irg, blk, high, mode_b, pnc & ~pn_Cmp_Eq),
+                       t,
+                       mode_b);
+       }  /* if */
+       return res;
+}  /* lower_boolean_Proj_Cmp */
+
+/**
+ * The type of a lower function.
+ *
+ * @param node   the node to be lowered
+ * @param mode   the low mode for the destination node
+ * @param env    the lower environment
+ */
 typedef void (*lower_func)(ir_node *node, ir_mode *mode, lower_env_t *env);
 
 /**
@@ -2044,14 +2394,44 @@ static void lower_ops(ir_node *node, void *env)
        lower_env_t  *lenv = env;
        node_entry_t *entry;
        int          idx = get_irn_idx(node);
-
-       entry = lenv->entries[idx];
+       ir_mode      *mode = get_irn_mode(node);
+
+       if (mode == mode_b || is_Mux(node) || is_Conv(node)) {
+               int i;
+
+               for (i = get_irn_arity(node) - 1; i >= 0; --i) {
+                       ir_node *proj = get_irn_n(node, i);
+
+                       if (is_Proj(proj)) {
+                               ir_node *cmp = get_Proj_pred(proj);
+
+                               if (is_Cmp(cmp)) {
+                                       ir_node *arg = get_Cmp_left(cmp);
+
+                                       mode = get_irn_mode(arg);
+                                       if (mode == lenv->params->high_signed ||
+                                               mode == lenv->params->high_unsigned) {
+                                               ir_node *res = lower_boolean_Proj_Cmp(proj, cmp, lenv);
+
+                                               if (res == NULL) {
+                                                       /* could not lower because predecessors not ready */
+                                                       waitq_put(lenv->waitq, node);
+                                                       return;
+                                               }  /* if */
+                                               set_irn_n(node, i, res);
+                                       }  /* if */
+                               }  /* if */
+                       }  /* if */
+               }  /* for */
+       }  /* if */
+
+       entry = idx < lenv->n_entries ? lenv->entries[idx] : NULL;
        if (entry || always_lower(get_irn_opcode(node))) {
                ir_op      *op = get_irn_op(node);
                lower_func func = (lower_func)op->ops.generic;
 
                if (func) {
-                       ir_mode *mode = get_irn_op_mode(node);
+                       mode = get_irn_op_mode(node);
 
                        if (mode == lenv->params->high_signed)
                                mode = lenv->params->low_signed;
@@ -2060,8 +2440,8 @@ static void lower_ops(ir_node *node, void *env)
 
                        DB((dbg, LEVEL_1, "  %+F\n", node));
                        func(node, mode, lenv);
-               }
-       }
+               }  /* if */
+       }  /* if */
 }  /* lower_ops */
 
 #define IDENT(s)  new_id_from_chars(s, sizeof(s)-1)
@@ -2072,6 +2452,7 @@ static void lower_ops(ir_node *node, void *env)
 static int cmp_op_mode(const void *elt, const void *key, size_t size) {
        const op_mode_entry_t *e1 = elt;
        const op_mode_entry_t *e2 = key;
+       (void) size;
 
        return (e1->op - e2->op) | (e1->imode - e2->imode) | (e1->omode - e2->omode);
 }  /* cmp_op_mode */
@@ -2082,10 +2463,44 @@ static int cmp_op_mode(const void *elt, const void *key, size_t size) {
 static int cmp_conv_tp(const void *elt, const void *key, size_t size) {
        const conv_tp_entry_t *e1 = elt;
        const conv_tp_entry_t *e2 = key;
+       (void) size;
 
        return (e1->imode - e2->imode) | (e1->omode - e2->omode);
-}  /*
-static int cmp_conv_tp */
+}  /* cmp_conv_tp */
+
+/**
+ * Enter a lowering function into an ir_op.
+ */
+static void enter_lower_func(ir_op *op, lower_func func) {
+       op->ops.generic = (op_func)func;
+}  /* enter_lower_func */
+
+/**
+ * Returns non-zero if a method type must be lowered.
+ *
+ * @param mtp  the method type
+ */
+static int mtp_must_to_lowered(ir_type *mtp, lower_env_t *env) {
+       int i, n_params;
+
+       n_params = get_method_n_params(mtp);
+       if (n_params <= 0)
+               return 0;
+
+       /* first check if we have parameters that must be fixed */
+       for (i = 0; i < n_params; ++i) {
+               ir_type *tp = get_method_param_type(mtp, i);
+
+               if (is_Primitive_type(tp)) {
+                       ir_mode *mode = get_type_mode(tp);
+
+                       if (mode == env->params->high_signed ||
+                               mode == env->params->high_unsigned)
+                               return 1;
+               }  /* if */
+       }  /* for */
+       return 0;
+}  /* mtp_must_to_lowered */
 
 /*
  * Do the lowering.
@@ -2093,8 +2508,8 @@ static int cmp_conv_tp */
 void lower_dw_ops(const lwrdw_param_t *param)
 {
        lower_env_t lenv;
-       int i;
-       ir_graph *rem;
+       int         i;
+       ir_graph    *rem;
 
        if (! param)
                return;
@@ -2108,21 +2523,23 @@ void lower_dw_ops(const lwrdw_param_t *param)
        assert(2 * get_mode_size_bits(param->low_unsigned) == get_mode_size_bits(param->high_unsigned));
        assert(get_mode_size_bits(param->low_signed) == get_mode_size_bits(param->low_unsigned));
 
+       /* create the necessary maps */
        if (! prim_types)
                prim_types = pmap_create();
        if (! intrinsic_fkt)
-               intrinsic_fkt = new_set(cmp_op_mode, iro_MaxOpcode);
+               intrinsic_fkt = new_set(cmp_op_mode, iro_Last + 1);
        if (! conv_types)
                conv_types = new_set(cmp_conv_tp, 16);
        if (! lowered_type)
                lowered_type = pmap_create();
 
+       /* create a primitive unsigned and signed type */
        if (! tp_u)
                tp_u = get_primitive_type(param->low_unsigned);
        if (! tp_s)
                tp_s = get_primitive_type(param->low_signed);
 
-
+       /* create method types for the created binop calls */
        if (! binop_tp_u) {
                binop_tp_u = new_type_method(IDENT("binop_u_intrinsic"), 4, 2);
                set_method_param_type(binop_tp_u, 0, tp_u);
@@ -2131,16 +2548,16 @@ void lower_dw_ops(const lwrdw_param_t *param)
                set_method_param_type(binop_tp_u, 3, tp_u);
                set_method_res_type(binop_tp_u, 0, tp_u);
                set_method_res_type(binop_tp_u, 1, tp_u);
-       }
+       }  /* if */
        if (! binop_tp_s) {
                binop_tp_s = new_type_method(IDENT("binop_s_intrinsic"), 4, 2);
-               set_method_param_type(binop_tp_s, 0, tp_s);
+               set_method_param_type(binop_tp_s, 0, tp_u);
                set_method_param_type(binop_tp_s, 1, tp_s);
-               set_method_param_type(binop_tp_s, 2, tp_s);
+               set_method_param_type(binop_tp_s, 2, tp_u);
                set_method_param_type(binop_tp_s, 3, tp_s);
-               set_method_res_type(binop_tp_s, 0, tp_s);
+               set_method_res_type(binop_tp_s, 0, tp_u);
                set_method_res_type(binop_tp_s, 1, tp_s);
-       }
+       }  /* if */
        if (! shiftop_tp_u) {
                shiftop_tp_u = new_type_method(IDENT("shiftop_u_intrinsic"), 3, 2);
                set_method_param_type(shiftop_tp_u, 0, tp_u);
@@ -2148,44 +2565,47 @@ void lower_dw_ops(const lwrdw_param_t *param)
                set_method_param_type(shiftop_tp_u, 2, tp_u);
                set_method_res_type(shiftop_tp_u, 0, tp_u);
                set_method_res_type(shiftop_tp_u, 1, tp_u);
-       }
+       }  /* if */
        if (! shiftop_tp_s) {
                shiftop_tp_s = new_type_method(IDENT("shiftop_s_intrinsic"), 3, 2);
-               set_method_param_type(shiftop_tp_s, 0, tp_s);
+               set_method_param_type(shiftop_tp_s, 0, tp_u);
                set_method_param_type(shiftop_tp_s, 1, tp_s);
-               /* beware: shift count is always mode_Iu */
                set_method_param_type(shiftop_tp_s, 2, tp_u);
-               set_method_res_type(shiftop_tp_s, 0, tp_s);
+               set_method_res_type(shiftop_tp_s, 0, tp_u);
                set_method_res_type(shiftop_tp_s, 1, tp_s);
-       }
+       }  /* if */
        if (! unop_tp_u) {
                unop_tp_u = new_type_method(IDENT("unop_u_intrinsic"), 2, 2);
                set_method_param_type(unop_tp_u, 0, tp_u);
                set_method_param_type(unop_tp_u, 1, tp_u);
                set_method_res_type(unop_tp_u, 0, tp_u);
                set_method_res_type(unop_tp_u, 1, tp_u);
-       }
+       }  /* if */
        if (! unop_tp_s) {
                unop_tp_s = new_type_method(IDENT("unop_s_intrinsic"), 2, 2);
-               set_method_param_type(unop_tp_s, 0, tp_s);
+               set_method_param_type(unop_tp_s, 0, tp_u);
                set_method_param_type(unop_tp_s, 1, tp_s);
-               set_method_res_type(unop_tp_s, 0, tp_s);
+               set_method_res_type(unop_tp_s, 0, tp_u);
                set_method_res_type(unop_tp_s, 1, tp_s);
-       }
+       }  /* if */
 
-       lenv.tv_mode_bytes = new_tarval_from_long(get_mode_size_bytes(param->low_unsigned), mode_Iu);
-       lenv.tv_mode_bits  = new_tarval_from_long(get_mode_size_bits(param->low_unsigned), mode_Iu);
+       lenv.tv_mode_bytes = new_tarval_from_long(get_mode_size_bytes(param->low_unsigned), param->low_unsigned);
+       lenv.tv_mode_bits  = new_tarval_from_long(get_mode_size_bits(param->low_unsigned), param->low_unsigned);
        lenv.waitq         = new_pdeq();
        lenv.params        = param;
+       lenv.first_id      = new_id_from_chars(param->little_endian ? ".l" : ".h", 2);
+       lenv.next_id       = new_id_from_chars(param->little_endian ? ".h" : ".l", 2);
 
        /* first clear the generic function pointer for all ops */
        clear_irp_opcodes_generic_func();
 
-#define LOWER2(op, fkt)   op_##op->ops.generic = (op_func)fkt
+#define LOWER2(op, fkt)   enter_lower_func(op_##op, fkt)
 #define LOWER(op)         LOWER2(op, lower_##op)
 #define LOWER_BIN(op)     LOWER2(op, lower_Binop)
 #define LOWER_UN(op)      LOWER2(op, lower_Unop)
 
+       /* the table of all operations that must be lowered follows */
+       LOWER(ASM);
        LOWER(Load);
        LOWER(Store);
        LOWER(Const);
@@ -2198,6 +2618,7 @@ void lower_dw_ops(const lwrdw_param_t *param)
        LOWER(Call);
        LOWER(Unknown);
        LOWER(Phi);
+       LOWER(Mux);
        LOWER(Start);
 
        LOWER_BIN(Add);
@@ -2206,12 +2627,13 @@ void lower_dw_ops(const lwrdw_param_t *param)
        LOWER(Shl);
        LOWER(Shr);
        LOWER(Shrs);
-       LOWER(Rot);
-       LOWER_UN(Minus);
+       LOWER(Rotl);
        LOWER(DivMod);
        LOWER(Div);
        LOWER(Mod);
+       LOWER(Sel);
        LOWER_UN(Abs);
+       LOWER_UN(Minus);
 
        LOWER(Conv);
 
@@ -2223,20 +2645,42 @@ void lower_dw_ops(const lwrdw_param_t *param)
        /* transform all graphs */
        rem = current_ir_graph;
        for (i = get_irp_n_irgs() - 1; i >= 0; --i) {
-               ir_graph *irg = get_irp_irg(i);
+               ir_graph  *irg = get_irp_irg(i);
+               ir_entity *ent;
+               ir_type   *mtp;
                int n_idx;
 
                obstack_init(&lenv.obst);
 
                n_idx = get_irg_last_idx(irg);
+               n_idx = n_idx + (n_idx >> 2);  /* add 25% */
                lenv.n_entries = n_idx;
-               lenv.entries   = xmalloc(n_idx * sizeof(lenv.entries[0]));
+               lenv.entries   = NEW_ARR_F(node_entry_t *, n_idx);
                memset(lenv.entries, 0, n_idx * sizeof(lenv.entries[0]));
 
-               /* first step: link all nodes and allocate data */
-               lenv.flags = 0;
+               lenv.l_mtp        = NULL;
+               lenv.flags        = 0;
                lenv.proj_2_block = pmap_create();
-               irg_walk_graph(irg, firm_clear_link, prepare_links, &lenv);
+#ifndef NDEBUG
+               lenv.value_param_tp = NULL;
+#endif
+               ir_reserve_resources(irg, IR_RESOURCE_PHI_LIST | IR_RESOURCE_IRN_LINK);
+
+               ent = get_irg_entity(irg);
+               mtp = get_entity_type(ent);
+
+               if (mtp_must_to_lowered(mtp, &lenv)) {
+                       ir_type *ltp = lower_mtp(mtp, &lenv);
+                       lenv.flags |= MUST_BE_LOWERED;
+                       set_entity_type(ent, ltp);
+                       lenv.l_mtp = ltp;
+#ifndef NDEBUG
+                       lenv.value_param_tp = get_method_value_param_type(mtp);
+#endif
+               }  /* if */
+
+               /* first step: link all nodes and allocate data */
+               irg_walk_graph(irg, firm_clear_node_and_phi_links, prepare_links_and_handle_rotl, &lenv);
 
                if (lenv.flags & MUST_BE_LOWERED) {
                        DB((dbg, LEVEL_1, "Lowering graph %+F\n", irg));
@@ -2251,7 +2695,9 @@ void lower_dw_ops(const lwrdw_param_t *param)
                                ir_node *node = pdeq_getl(lenv.waitq);
 
                                lower_ops(node, &lenv);
-                       }
+                       }  /* while */
+
+                       ir_free_resources(irg, IR_RESOURCE_PHI_LIST | IR_RESOURCE_IRN_LINK);
 
                        /* outs are invalid, we changed the graph */
                        set_irg_outs_inconsistent(irg);
@@ -2261,32 +2707,34 @@ void lower_dw_ops(const lwrdw_param_t *param)
                                set_irg_doms_inconsistent(irg);
                                set_irg_extblk_inconsistent(irg);
                                set_irg_loopinfo_inconsistent(irg);
-                       }
-
-                       dump_ir_block_graph(irg, "-dw");
-               }
+                       }  /* if */
+               } else {
+                       ir_free_resources(irg, IR_RESOURCE_PHI_LIST | IR_RESOURCE_IRN_LINK);
+               }  /* if */
                pmap_destroy(lenv.proj_2_block);
-               free(lenv.entries);
+               DEL_ARR_F(lenv.entries);
                obstack_free(&lenv.obst, NULL);
-       }
+       }  /* for */
        del_pdeq(lenv.waitq);
        current_ir_graph = rem;
 }  /* lower_dw_ops */
 
 /* Default implementation. */
-entity *def_create_intrinsic_fkt(ir_type *method, const ir_op *op,
-                                 const ir_mode *imode, const ir_mode *omode,
-                                 void *context)
+ir_entity *def_create_intrinsic_fkt(ir_type *method, const ir_op *op,
+                                    const ir_mode *imode, const ir_mode *omode,
+                                    void *context)
 {
        char buf[64];
        ident *id;
-       entity *ent;
+       ir_entity *ent;
+       (void) context;
 
-       if (imode == omode)
+       if (imode == omode) {
                snprintf(buf, sizeof(buf), "__l%s%s", get_op_name(op), get_mode_name(imode));
-       else
+       } else {
                snprintf(buf, sizeof(buf), "__l%s%s%s", get_op_name(op),
                        get_mode_name(imode), get_mode_name(omode));
+       }  /* if */
        id = new_id_from_str(buf);
 
        ent = new_entity(get_glob_type(), id, method);