X-Git-Url: http://nsz.repo.hu/git/?a=blobdiff_plain;f=ir%2Fir%2Firmode.c;h=f416054394c0c55d496c5242abbc30becf144ae3;hb=fd761f39f43ad67aae5217a5d1fdbe9837d766d2;hp=03b7f5aefd2f398850b03a85fe6a361e9180e36e;hpb=cfa24dd607cf7697fd4ae36d5f23d382aa8415d8;p=libfirm

diff --git a/ir/ir/irmode.c b/ir/ir/irmode.c
index 03b7f5aef..f41605439 100644
--- a/ir/ir/irmode.c
+++ b/ir/ir/irmode.c
@@ -21,14 +21,13 @@
  * @file
  * @brief    Data modes of operations.
  * @author   Martin Trapp, Christian Schaefer, Goetz Lindenmaier, Mathias Heil
- * @version  $Id$
  */
 #include "config.h"
 
 #include <stdlib.h>
 #include <string.h>
-
 #include <stddef.h>
+#include <stdbool.h>
 
 #include "irprog_t.h"
 #include "irmode_t.h"
@@ -47,40 +46,13 @@ static struct obstack modes;
 /** The list of all currently existing modes. */
 static ir_mode **mode_list;
 
-const char *get_mode_arithmetic_name(ir_mode_arithmetic ari)
-{
-#define X(a)    case a: return #a
-	switch (ari) {
-		X(irma_uninitialized);
-		X(irma_none);
-		X(irma_twos_complement);
-		X(irma_ones_complement);
-		X(irma_int_BCD);
-		X(irma_ieee754);
-		X(irma_float_BCD);
-		default: return "<unknown>";
-	}
-#undef X
-}
-
-/**
- * Compare modes that don't need to have their code field
- * correctly set
- *
- * TODO: Add other fields
- **/
-static inline int modes_are_equal(const ir_mode *m, const ir_mode *n)
-{
-	if (m == n) return 1;
-	if (m->sort         == n->sort &&
-		m->arithmetic   == n->arithmetic &&
-		m->size         == n->size &&
-		m->sign         == n->sign  &&
-		m->modulo_shift == n->modulo_shift &&
-		m->vector_elem  == n->vector_elem)
-		return 1;
-
-	return 0;
+static bool modes_are_equal(const ir_mode *m, const ir_mode *n)
+{
+	return m->sort         == n->sort &&
+	       m->arithmetic   == n->arithmetic &&
+	       m->size         == n->size &&
+	       m->sign         == n->sign &&
+	       m->modulo_shift == n->modulo_shift;
 }
 
 /**
@@ -129,9 +101,12 @@ static void set_mode_values(ir_mode* mode)
 		mode->all_one = tarval_b_true;
 		break;
 
-	case irms_auxiliary:
-	case irms_memory:
 	case irms_control_flow:
+	case irms_block:
+	case irms_tuple:
+	case irms_any:
+	case irms_bad:
+	case irms_memory:
 		mode->min  = tarval_bad;
 		mode->max  = tarval_bad;
 		mode->null = tarval_bad;
@@ -141,13 +116,6 @@ static void set_mode_values(ir_mode* mode)
 	}
 }
 
-/* * *
- * globals defined in irmode.h
- * * */
-
-/* --- Predefined modes --- */
-
-/* FIRM internal modes: */
 ir_mode *mode_T;
 ir_mode *mode_X;
 ir_mode *mode_M;
@@ -155,38 +123,31 @@ ir_mode *mode_BB;
 ir_mode *mode_ANY;
 ir_mode *mode_BAD;
 
-/* predefined numerical modes: */
-ir_mode *mode_F;    /* float */
-ir_mode *mode_D;    /* double */
-ir_mode *mode_E;    /* long double */
+ir_mode *mode_F;
+ir_mode *mode_D;
+ir_mode *mode_Q;
 
-ir_mode *mode_Bs;   /* integral values, signed and unsigned */
-ir_mode *mode_Bu;   /* 8 bit */
-ir_mode *mode_Hs;   /* 16 bit */
+ir_mode *mode_Bs;
+ir_mode *mode_Bu;
+ir_mode *mode_Hs;
 ir_mode *mode_Hu;
-ir_mode *mode_Is;   /* 32 bit */
+ir_mode *mode_Is;
 ir_mode *mode_Iu;
-ir_mode *mode_Ls;   /* 64 bit */
+ir_mode *mode_Ls;
 ir_mode *mode_Lu;
-ir_mode *mode_LLs;  /* 128 bit */
+ir_mode *mode_LLs;
 ir_mode *mode_LLu;
 
 ir_mode *mode_b;
 ir_mode *mode_P;
 
-/* machine specific modes */
-ir_mode *mode_P_code;   /**< machine specific pointer mode for code addresses */
-ir_mode *mode_P_data;   /**< machine specific pointer mode for data addresses */
+ir_mode *mode_P_code;
+ir_mode *mode_P_data;
 
-/* * *
- * functions defined in irmode.h
- * * */
-
-/* JNI access functions */
 ir_mode *get_modeT(void) { return mode_T; }
 ir_mode *get_modeF(void) { return mode_F; }
 ir_mode *get_modeD(void) { return mode_D; }
-ir_mode *get_modeE(void) { return mode_E; }
+ir_mode *get_modeQ(void) { return mode_Q; }
 ir_mode *get_modeBs(void) { return mode_Bs; }
 ir_mode *get_modeBu(void) { return mode_Bu; }
 ir_mode *get_modeHs(void) { return mode_Hs; }
@@ -208,12 +169,12 @@ ir_mode *get_modeBAD(void) { return mode_BAD; }
 
 ir_mode *(get_modeP_code)(void)
 {
-	return _get_modeP_code();
+	return get_modeP_code_();
 }
 
 ir_mode *(get_modeP_data)(void)
 {
-	return _get_modeP_data();
+	return get_modeP_data_();
 }
 
 void set_modeP_code(ir_mode *p)
@@ -229,131 +190,88 @@ void set_modeP_data(ir_mode *p)
 	mode_P = p;
 }
 
-/**
- * Registers a new mode.
- *
- * @param new_mode  The new mode template.
+/*
+ * Creates a new mode.
  */
-static ir_mode *register_mode(const ir_mode *new_mode)
-{
-	ir_mode *mode = NULL;
-
-	assert(new_mode);
-
-	/* copy mode struct to modes array */
-	mode = (ir_mode *)obstack_copy(&modes, new_mode, sizeof(*mode));
-	ARR_APP1(ir_mode*, mode_list, mode);
+static ir_mode *alloc_mode(const char *name, ir_mode_sort sort,
+                           ir_mode_arithmetic arithmetic, unsigned bit_size,
+                           int sign, unsigned modulo_shift)
+{
+	ir_mode *mode_tmpl = OALLOCZ(&modes, ir_mode);
+
+	mode_tmpl->name         = new_id_from_str(name);
+	mode_tmpl->sort         = sort;
+	mode_tmpl->size         = bit_size;
+	mode_tmpl->sign         = sign ? 1 : 0;
+	mode_tmpl->modulo_shift = modulo_shift;
+	mode_tmpl->arithmetic   = arithmetic;
+	mode_tmpl->link         = NULL;
+	mode_tmpl->tv_priv      = NULL;
+	return mode_tmpl;
+}
+
+static ir_mode *register_mode(ir_mode *mode)
+{
+	/* does any of the existing modes have the same properties? */
+	ir_mode *old = find_mode(mode);
+	if (old != NULL) {
+		/* remove new mode from obstack */
+		obstack_free(&modes, mode);
+		return old;
+	}
 
 	mode->kind = k_ir_mode;
 	mode->type = new_type_primitive(mode);
-
-	/* add the new mode to the irp list of modes */
-	add_irp_mode(mode);
-
+	ARR_APP1(ir_mode*, mode_list, mode);
 	set_mode_values(mode);
-
-	hook_new_mode(new_mode, mode);
+	hook_new_mode(mode);
 	return mode;
 }
 
-/*
- * Creates a new mode.
- */
-ir_mode *new_ir_mode(const char *name, ir_mode_sort sort, int bit_size, int sign,
-                     ir_mode_arithmetic arithmetic, unsigned int modulo_shift)
-{
-	ir_mode mode_tmpl;
-	ir_mode *mode = NULL;
-
-	mode_tmpl.name         = new_id_from_str(name);
-	mode_tmpl.sort         = sort;
-	mode_tmpl.size         = bit_size;
-	mode_tmpl.sign         = sign ? 1 : 0;
-	mode_tmpl.modulo_shift = (mode_tmpl.sort == irms_int_number ||
-	                          mode_tmpl.sort == irms_reference) ? modulo_shift : 0;
-	mode_tmpl.vector_elem  = 1;
-	mode_tmpl.arithmetic   = arithmetic;
-	mode_tmpl.link         = NULL;
-	mode_tmpl.tv_priv      = NULL;
-
-	mode = find_mode(&mode_tmpl);
-	if (mode) {
-		hook_new_mode(&mode_tmpl, mode);
-		return mode;
-	}
-
-	/* sanity checks */
-	switch (sort) {
-	case irms_auxiliary:
-	case irms_control_flow:
-	case irms_memory:
-	case irms_internal_boolean:
-		panic("internal modes cannot be user defined");
+ir_mode *new_int_mode(const char *name, ir_mode_arithmetic arithmetic,
+                      unsigned bit_size, int sign, unsigned modulo_shift)
+{
+	ir_mode *result = alloc_mode(name, irms_int_number, arithmetic, bit_size,
+	                             sign, modulo_shift);
+	return register_mode(result);
+}
 
-	case irms_float_number:
-	case irms_int_number:
-	case irms_reference:
-		mode = register_mode(&mode_tmpl);
-		break;
-	}
-	assert(mode != NULL);
-	return mode;
+ir_mode *new_reference_mode(const char *name, ir_mode_arithmetic arithmetic,
+                            unsigned bit_size, unsigned modulo_shift)
+{
+	ir_mode *result = alloc_mode(name, irms_reference, arithmetic, bit_size,
+	                             0, modulo_shift);
+	return register_mode(result);
 }
 
-/*
- * Creates a new vector mode.
- */
-ir_mode *new_ir_vector_mode(const char *name, ir_mode_sort sort, int bit_size, unsigned num_of_elem, int sign,
-                            ir_mode_arithmetic arithmetic, unsigned int modulo_shift)
-{
-	ir_mode mode_tmpl;
-	ir_mode *mode = NULL;
-
-	mode_tmpl.name         = new_id_from_str(name);
-	mode_tmpl.sort         = sort;
-	mode_tmpl.size         = bit_size * num_of_elem;
-	mode_tmpl.sign         = sign ? 1 : 0;
-	mode_tmpl.modulo_shift = (mode_tmpl.sort == irms_int_number) ? modulo_shift : 0;
-	mode_tmpl.vector_elem  = num_of_elem;
-	mode_tmpl.arithmetic   = arithmetic;
-	mode_tmpl.link         = NULL;
-	mode_tmpl.tv_priv      = NULL;
-
-	mode = find_mode(&mode_tmpl);
-	if (mode) {
-		hook_new_mode(&mode_tmpl, mode);
-		return mode;
-	}
+ir_mode *new_float_mode(const char *name, ir_mode_arithmetic arithmetic,
+                        unsigned exponent_size, unsigned mantissa_size)
+{
+	bool     explicit_one = false;
+	unsigned bit_size     = exponent_size + mantissa_size + 1;
+	ir_mode *result;
 
-	if (num_of_elem <= 1) {
-		panic("vector modes should have at least 2 elements");
+	if (arithmetic == irma_x86_extended_float) {
+		explicit_one = true;
+		bit_size++;
+	} else if (arithmetic != irma_ieee754) {
+		panic("Arithmetic %s invalid for float");
 	}
+	if (exponent_size >= 256)
+		panic("Exponents >= 256 bits not supported");
+	if (mantissa_size >= 256)
+		panic("Mantissa >= 256 bits not supported");
 
-	/* sanity checks */
-	switch (sort) {
-	case irms_auxiliary:
-	case irms_control_flow:
-	case irms_memory:
-	case irms_internal_boolean:
-		panic("internal modes cannot be user defined");
-
-	case irms_reference:
-		panic("only integer and floating point modes can be vectorized");
-
-	case irms_float_number:
-		panic("not yet implemented");
-
-	case irms_int_number:
-		mode = register_mode(&mode_tmpl);
-	}
-	assert(mode != NULL);
-	return mode;
+	result = alloc_mode(name, irms_float_number, irma_x86_extended_float, bit_size, 1, 0);
+	result->float_desc.exponent_size = exponent_size;
+	result->float_desc.mantissa_size = mantissa_size;
+	result->float_desc.explicit_one  = explicit_one;
+	return register_mode(result);
 }
 
-/* Functions for the direct access to all attributes of an ir_mode */
 ident *(get_mode_ident)(const ir_mode *mode)
 {
-	return _get_mode_ident(mode);
+	return get_mode_ident_(mode);
 }
 
 const char *get_mode_name(const ir_mode *mode)
@@ -361,54 +279,40 @@ const char *get_mode_name(const ir_mode *mode)
 	return get_id_str(mode->name);
 }
 
-ir_mode_sort (get_mode_sort)(const ir_mode* mode)
-{
-	return _get_mode_sort(mode);
-}
-
 unsigned (get_mode_size_bits)(const ir_mode *mode)
 {
-	return _get_mode_size_bits(mode);
+	return get_mode_size_bits_(mode);
 }
 
 unsigned (get_mode_size_bytes)(const ir_mode *mode)
 {
-	return _get_mode_size_bytes(mode);
+	return get_mode_size_bytes_(mode);
 }
 
 int (get_mode_sign)(const ir_mode *mode)
 {
-	return _get_mode_sign(mode);
+	return get_mode_sign_(mode);
 }
 
 ir_mode_arithmetic (get_mode_arithmetic)(const ir_mode *mode)
 {
-	return get_mode_arithmetic(mode);
+	return get_mode_arithmetic_(mode);
 }
 
 
-/* Attribute modulo shift specifies for modes of kind irms_int_number
- *  whether shift applies modulo to value of bits to shift.  Asserts
- *  if mode is not irms_int_number.
- */
 unsigned int (get_mode_modulo_shift)(const ir_mode *mode)
 {
-	return _get_mode_modulo_shift(mode);
-}
-
-unsigned int (get_mode_n_vector_elems)(const ir_mode *mode)
-{
-	return _get_mode_vector_elems(mode);
+	return get_mode_modulo_shift_(mode);
 }
 
 void *(get_mode_link)(const ir_mode *mode)
 {
-	return _get_mode_link(mode);
+	return get_mode_link_(mode);
 }
 
 void (set_mode_link)(ir_mode *mode, void *l)
 {
-	_set_mode_link(mode, l);
+	set_mode_link_(mode, l);
 }
 
 ir_tarval *get_mode_min(ir_mode *mode)
@@ -481,55 +385,54 @@ int is_mode(const void *thing)
 
 int (mode_is_signed)(const ir_mode *mode)
 {
-	return _mode_is_signed(mode);
+	return mode_is_signed_(mode);
 }
 
 int (mode_is_float)(const ir_mode *mode)
 {
-	return _mode_is_float(mode);
+	return mode_is_float_(mode);
 }
 
 int (mode_is_int)(const ir_mode *mode)
 {
-	return _mode_is_int(mode);
+	return mode_is_int_(mode);
 }
 
 int (mode_is_reference)(const ir_mode *mode)
 {
-	return _mode_is_reference(mode);
+	return mode_is_reference_(mode);
 }
 
 int (mode_is_num)(const ir_mode *mode)
 {
-	return _mode_is_num(mode);
+	return mode_is_num_(mode);
 }
 
 int (mode_is_data)(const ir_mode *mode)
 {
-	return _mode_is_data(mode);
+	return mode_is_data_(mode);
 }
 
 int (mode_is_datab)(const ir_mode *mode)
 {
-	return _mode_is_datab(mode);
+	return mode_is_datab_(mode);
 }
 
 int (mode_is_dataM)(const ir_mode *mode)
 {
-	return _mode_is_dataM(mode);
+	return mode_is_dataM_(mode);
 }
 
-int (mode_is_float_vector)(const ir_mode *mode)
+unsigned (get_mode_mantissa_size)(const ir_mode *mode)
 {
-	return _mode_is_float_vector(mode);
+	return get_mode_mantissa_size_(mode);
 }
 
-int (mode_is_int_vector)(const ir_mode *mode)
+unsigned (get_mode_exponent_size)(const ir_mode *mode)
 {
-	return _mode_is_int_vector(mode);
+	return get_mode_exponent_size_(mode);
 }
 
-/* Returns true if sm can be converted to lm without loss. */
 int smaller_mode(const ir_mode *sm, const ir_mode *lm)
 {
 	int sm_bits, lm_bits;
@@ -601,42 +504,44 @@ int smaller_mode(const ir_mode *sm, const ir_mode *lm)
 	return 0;
 }
 
-/* Returns true if a value of mode sm can be converted into mode lm
-   and backwards without loss. */
 int values_in_mode(const ir_mode *sm, const ir_mode *lm)
 {
-	ir_mode_arithmetic arith;
-
-	assert(sm);
-	assert(lm);
-
-	if (sm == lm) return 1;
+	if (sm == lm)
+		return true;
 
 	if (sm == mode_b)
-		return mode_is_int(lm);
-
-	arith = get_mode_arithmetic(sm);
-	if (arith != get_mode_arithmetic(lm))
-		return 0;
-
-	switch (arith) {
-		case irma_twos_complement:
-		case irma_ieee754:
+		return mode_is_int(lm) || mode_is_float(lm);
+
+	ir_mode_arithmetic larith = get_mode_arithmetic(lm);
+	ir_mode_arithmetic sarith = get_mode_arithmetic(sm);
+	switch (larith) {
+	case irma_x86_extended_float:
+	case irma_ieee754:
+		if (sarith == irma_ieee754 || sarith == irma_x86_extended_float) {
 			return get_mode_size_bits(sm) <= get_mode_size_bits(lm);
-
-		default:
-			return 0;
+		} else if (sarith == irma_twos_complement) {
+			unsigned int_mantissa   = get_mode_size_bits(sm) - (mode_is_signed(sm) ? 1 : 0);
+			unsigned float_mantissa = get_mode_mantissa_size(lm) + 1;
+			return int_mantissa <= float_mantissa;
+		}
+		break;
+	case irma_twos_complement:
+		if (sarith == irma_twos_complement) {
+			return get_mode_size_bits(sm) <= get_mode_size_bits(lm);
+		}
+		break;
+	case irma_none:
+		break;
 	}
+	return false;
 }
 
-/* Return the signed integer equivalent mode for an reference mode. */
 ir_mode *get_reference_mode_signed_eq(ir_mode *mode)
 {
 	assert(mode_is_reference(mode));
 	return mode->eq_signed;
 }
 
-/* Sets the signed integer equivalent mode for an reference mode. */
 void set_reference_mode_signed_eq(ir_mode *ref_mode, ir_mode *int_mode)
 {
 	assert(mode_is_reference(ref_mode));
@@ -644,14 +549,12 @@ void set_reference_mode_signed_eq(ir_mode *ref_mode, ir_mode *int_mode)
 	ref_mode->eq_signed = int_mode;
 }
 
-/* Return the unsigned integer equivalent mode for an reference mode. */
 ir_mode *get_reference_mode_unsigned_eq(ir_mode *mode)
 {
 	assert(mode_is_reference(mode));
 	return mode->eq_unsigned;
 }
 
-/* Sets the unsigned integer equivalent mode for an reference mode. */
 void set_reference_mode_unsigned_eq(ir_mode *ref_mode, ir_mode *int_mode)
 {
 	assert(mode_is_reference(ref_mode));
@@ -659,188 +562,50 @@ void set_reference_mode_unsigned_eq(ir_mode *ref_mode, ir_mode *int_mode)
 	ref_mode->eq_unsigned = int_mode;
 }
 
-/* initialization, build the default modes */
-void init_mode(void)
+static ir_mode *new_internal_mode(const char *name, ir_mode_sort sort)
 {
-	ir_mode newmode;
+	ir_mode *mode = alloc_mode(name, sort, irma_none, 0, 0, 0);
+	return register_mode(mode);
+}
 
+void init_mode(void)
+{
 	obstack_init(&modes);
 	mode_list = NEW_ARR_F(ir_mode*, 0);
 
 	/* initialize predefined modes */
-
-	/* Internal Modes */
-	newmode.arithmetic   = irma_none;
-	newmode.size         = 0;
-	newmode.sign         = 0;
-	newmode.modulo_shift = 0;
-	newmode.vector_elem  = 0;
-	newmode.eq_signed    = NULL;
-	newmode.eq_unsigned  = NULL;
-	newmode.link         = NULL;
-	newmode.tv_priv      = NULL;
-
-	/* Control Flow Modes*/
-	newmode.sort    = irms_control_flow;
-
-	/* Basic Block */
-	newmode.name    = new_id_from_chars("BB", 2);
-	mode_BB         = register_mode(&newmode);
-
-	/* eXecution */
-	newmode.name    = new_id_from_chars("X", 1);
-	mode_X          = register_mode(&newmode);
-
-	/* Memory Modes */
-	newmode.sort    = irms_memory;
-
-	/* Memory */
-	newmode.name    = new_id_from_chars("M", 1);
-	mode_M          = register_mode(&newmode);
-
-	/* Auxiliary Modes */
-	newmode.sort    = irms_auxiliary,
-
-	/* Tuple */
-	newmode.name    = new_id_from_chars("T", 1);
-	mode_T          = register_mode(&newmode);
-
-	/* ANY */
-	newmode.name    = new_id_from_chars("ANY", 3);
-	mode_ANY        = register_mode(&newmode);
-
-	/* BAD */
-	newmode.name    = new_id_from_chars("BAD", 3);
-	mode_BAD        = register_mode(&newmode);
-
-	/* Internal Boolean Modes */
-	newmode.sort    = irms_internal_boolean;
-
-	/* boolean */
-	newmode.name    = new_id_from_chars("b", 1);
-	mode_b          = register_mode(&newmode);
-
-	/* Data Modes */
-	newmode.vector_elem = 1;
-
-	/* Float Number Modes */
-	newmode.sort       = irms_float_number;
-	newmode.arithmetic = irma_ieee754;
-
-	/* float */
-	newmode.name    = new_id_from_chars("F", 1);
-	newmode.sign    = 1;
-	newmode.size    = 32;
-	mode_F          = register_mode(&newmode);
-
-	/* double */
-	newmode.name    = new_id_from_chars("D", 1);
-	newmode.sign    = 1;
-	newmode.size    = 64;
-	mode_D          = register_mode(&newmode);
-
-	/* extended */
-	newmode.name    = new_id_from_chars("E", 1);
-	newmode.sign    = 1;
-	/* note that the tarval module is calculating with 80 bits, but we use
-	 * 96 bits, as that is what will be stored to memory by most hardware */
-	newmode.size    = 96;
-	mode_E          = register_mode(&newmode);
-
-	/* Integer Number Modes */
-	newmode.sort         = irms_int_number;
-	newmode.arithmetic   = irma_twos_complement;
-
-	/* signed byte */
-	newmode.name         = new_id_from_chars("Bs", 2);
-	newmode.sign         = 1;
-	newmode.size         = 8;
-	newmode.modulo_shift = 32;
-	mode_Bs              = register_mode(&newmode);
-
-	/* unsigned byte */
-	newmode.name         = new_id_from_chars("Bu", 2);
-	newmode.arithmetic   = irma_twos_complement;
-	newmode.sign         = 0;
-	newmode.size         = 8;
-	newmode.modulo_shift = 32;
-	mode_Bu              = register_mode(&newmode);
-
-	/* signed short integer */
-	newmode.name         = new_id_from_chars("Hs", 2);
-	newmode.sign         = 1;
-	newmode.size         = 16;
-	newmode.modulo_shift = 32;
-	mode_Hs              = register_mode(&newmode);
-
-	/* unsigned short integer */
-	newmode.name         = new_id_from_chars("Hu", 2);
-	newmode.sign         = 0;
-	newmode.size         = 16;
-	newmode.modulo_shift = 32;
-	mode_Hu              = register_mode(&newmode);
-
-	/* signed integer */
-	newmode.name         = new_id_from_chars("Is", 2);
-	newmode.sign         = 1;
-	newmode.size         = 32;
-	newmode.modulo_shift = 32;
-	mode_Is              = register_mode(&newmode);
-
-	/* unsigned integer */
-	newmode.name         = new_id_from_chars("Iu", 2);
-	newmode.sign         = 0;
-	newmode.size         = 32;
-	newmode.modulo_shift = 32;
-	mode_Iu              = register_mode(&newmode);
-
-	/* signed long integer */
-	newmode.name         = new_id_from_chars("Ls", 2);
-	newmode.sign         = 1;
-	newmode.size         = 64;
-	newmode.modulo_shift = 64;
-	mode_Ls              = register_mode(&newmode);
-
-	/* unsigned long integer */
-	newmode.name         = new_id_from_chars("Lu", 2);
-	newmode.sign         = 0;
-	newmode.size         = 64;
-	newmode.modulo_shift = 64;
-	mode_Lu              = register_mode(&newmode);
-
-	/* signed long long integer */
-	newmode.name         = new_id_from_chars("LLs", 3);
-	newmode.sign         = 1;
-	newmode.size         = 128;
-	newmode.modulo_shift = 128;
-	mode_LLs             = register_mode(&newmode);
-
-	/* unsigned long long integer */
-	newmode.name         = new_id_from_chars("LLu", 3);
-	newmode.sign         = 0;
-	newmode.size         = 128;
-	newmode.modulo_shift = 128;
-	mode_LLu             = register_mode(&newmode);
-
-	/* Reference Mode */
-	newmode.sort       = irms_reference;
-	newmode.arithmetic = irma_twos_complement;
-
-	/* pointer */
-	newmode.name         = new_id_from_chars("P", 1);
-	newmode.sign         = 0;
-	newmode.size         = 32;
-	newmode.modulo_shift = 32;
-	newmode.eq_signed    = mode_Is;
-	newmode.eq_unsigned  = mode_Iu;
-	mode_P               = register_mode(&newmode);
+	mode_BB  = new_internal_mode("BB",  irms_block);
+	mode_X   = new_internal_mode("X",   irms_control_flow);
+	mode_M   = new_internal_mode("M",   irms_memory);
+	mode_T   = new_internal_mode("T",   irms_tuple);
+	mode_ANY = new_internal_mode("ANY", irms_any);
+	mode_BAD = new_internal_mode("BAD", irms_bad);
+	mode_b   = new_internal_mode("b",   irms_internal_boolean);
+
+	mode_F   = new_float_mode("F", irma_ieee754,  8, 23);
+	mode_D   = new_float_mode("D", irma_ieee754, 11, 52);
+	mode_Q   = new_float_mode("Q", irma_ieee754, 15, 112);
+
+	mode_Bs  = new_int_mode("Bs",  irma_twos_complement, 8,   1, 32);
+	mode_Bu  = new_int_mode("Bu",  irma_twos_complement, 8,   0, 32);
+	mode_Hs  = new_int_mode("Hs",  irma_twos_complement, 16,  1, 32);
+	mode_Hu  = new_int_mode("Hu",  irma_twos_complement, 16,  0, 32);
+	mode_Is  = new_int_mode("Is",  irma_twos_complement, 32,  1, 32);
+	mode_Iu  = new_int_mode("Iu",  irma_twos_complement, 32,  0, 32);
+	mode_Ls  = new_int_mode("Ls",  irma_twos_complement, 64,  1, 64);
+	mode_Lu  = new_int_mode("Lu",  irma_twos_complement, 64,  0, 64);
+	mode_LLs = new_int_mode("LLs", irma_twos_complement, 128, 1, 128);
+	mode_LLu = new_int_mode("LLu", irma_twos_complement, 128, 0, 128);
+
+	mode_P   = new_reference_mode("P", irma_twos_complement, 32, 32);
+	set_reference_mode_signed_eq(mode_P, mode_Is);
+	set_reference_mode_unsigned_eq(mode_P, mode_Iu);
 
 	/* set the machine specific modes to the predefined ones */
 	mode_P_code = mode_P;
 	mode_P_data = mode_P;
 }
 
-/* find a signed mode for an unsigned integer mode */
 ir_mode *find_unsigned_mode(const ir_mode *mode)
 {
 	ir_mode n = *mode;
@@ -854,7 +619,6 @@ ir_mode *find_unsigned_mode(const ir_mode *mode)
 	return find_mode(&n);
 }
 
-/* find an unsigned mode for a signed integer mode */
 ir_mode *find_signed_mode(const ir_mode *mode)
 {
 	ir_mode n = *mode;
@@ -864,7 +628,6 @@ ir_mode *find_signed_mode(const ir_mode *mode)
 	return find_mode(&n);
 }
 
-/* finds a integer mode with 2*n bits for an integer mode with n bits. */
 ir_mode *find_double_bits_int_mode(const ir_mode *mode)
 {
 	ir_mode n = *mode;
@@ -875,10 +638,6 @@ ir_mode *find_double_bits_int_mode(const ir_mode *mode)
 	return find_mode(&n);
 }
 
-/*
- * Returns non-zero if the given mode honors signed zero's, i.e.,
- * a +0 and a -0 exists and handled differently.
- */
 int mode_honor_signed_zeros(const ir_mode *mode)
 {
 	/* for floating point, we know that IEEE 754 has +0 and -0,
@@ -889,11 +648,6 @@ int mode_honor_signed_zeros(const ir_mode *mode)
 		mode->arithmetic != irma_ieee754;
 }
 
-/*
- * Returns non-zero if the given mode might overflow on unary Minus.
- *
- * This does NOT happen on IEEE 754.
- */
 int mode_overflow_on_unary_Minus(const ir_mode *mode)
 {
 	if (mode->sort == irms_float_number)
@@ -901,24 +655,12 @@ int mode_overflow_on_unary_Minus(const ir_mode *mode)
 	return 1;
 }
 
-/*
- * Returns non-zero if the mode has a reversed wrap-around
- * logic, especially (a + x) - x == a.
- *
- * This is normally true for integer modes, not for floating
- * point modes.
- */
 int mode_wrap_around(const ir_mode *mode)
 {
 	/* FIXME: better would be an extra mode property */
 	return mode_is_int(mode);
 }
 
-/*
- * Returns non-zero if the cast from mode src to mode dst is a
- * reinterpret cast (ie. only the bit pattern is reinterpreted,
- * no conversion is done)
- */
 int is_reinterpret_cast(const ir_mode *src, const ir_mode *dst)
 {
 	ir_mode_arithmetic ma;
@@ -931,7 +673,7 @@ int is_reinterpret_cast(const ir_mode *src, const ir_mode *dst)
 	if (ma != get_mode_arithmetic(dst))
 		return 0;
 
-	return ma == irma_twos_complement || ma == irma_ones_complement;
+	return ma == irma_twos_complement;
 }
 
 ir_type *(get_type_for_mode) (const ir_mode *mode)
@@ -939,6 +681,17 @@ ir_type *(get_type_for_mode) (const ir_mode *mode)
 	return get_type_for_mode_(mode);
 }
 
+size_t ir_get_n_modes(void)
+{
+	return ARR_LEN(mode_list);
+}
+
+ir_mode *ir_get_mode(size_t num)
+{
+	assert(num < ARR_LEN(mode_list));
+	return mode_list[num];
+}
+
 void finish_mode(void)
 {
 	obstack_free(&modes, 0);
@@ -953,7 +706,6 @@ void finish_mode(void)
 
 	mode_F   = NULL;
 	mode_D   = NULL;
-	mode_E   = NULL;
 
 	mode_Bs  = NULL;
 	mode_Bu  = NULL;