-/* Copyright (C) 1998 - 2000 by Universitaet Karlsruhe
- * All rights reserved.
+/*
+ * Project: libFIRM
+ * File name: ir/ir/irmode.h
+ * Purpose: Data modes of operations.
+ * Author: Martin Trapp, Christian Schaefer
+ * Modified by: Goetz Lindenmaier, Mathias Heil, Michael Beck
+ * Created:
+ * CVS-ID: $Id$
+ * Copyright: (c) 1998-2007 Universität Karlsruhe
+ * Licence: This file protected by GPL - GNU GENERAL PUBLIC LICENSE.
*/
-/* $Id$ */
-/****h* libfirm/irmode
- *
- * NAME
+/**
+ * @file irmode.h
* irmode -- Modes for ir operators
*
- * AUTHORS
- * Christian Schaefer
- * Matthias Heil
+ * @author Christian Schaefer, Matthias Heil
*
- * DESCRIPTION
- * This module specifies the modes that type the firm nodes.
+ * This module specifies the modes that type the firm nodes. It defines
+ * a datasturcture that describes a mode and implements constructors and
+ * access routines to this datastructure. Further it defines a set of
+ * predefined modes.
*
- * SEE ALSO
+ * SEE ALSO:
* UKA tech report 1999-44 for more information about modes.
*
- ******/
-# ifndef _IRMODE_H_
-# define _IRMODE_H_
+ */
-#include "ident.h"
-#include <stdbool.h>
+#ifndef _FIRM_IR_IRMODE_H_
+#define _FIRM_IR_IRMODE_H_
-#ifndef _TARVAL_TYPEDEF_
-#define _TARVAL_TYPEDEF_
- typedef struct tarval tarval;
-#endif
+#include "firm_types.h"
+#include "ident.h"
-/****s* tv/ir_mode
- *
- * NAME
- * ir_mode
- * Contains relevant information about a mode
+/**
+ * Contains relevant information about a mode.
*
- * DESCRIPTION
- * Neccessary information about a mode is stored in this struct
- * which is used by the tarval modul to perform calculations
- * and comparisons of values of a such described mode
+ * Necessary information about a mode is stored in this struct
+ * which is used by the tarval module to perform calculations
+ * and comparisons of values of a such described mode.
*
- * ATTRIBUTES
- * modecode code: An unambigous int for the mode
- * ident *name: Name of this mode
- * mode_sort sort: sort of mode specifying possible usage kategories
- * int size: size of the mode in Bits.
- * int align: byte alignment
- * unsigned sign:1: signedness of this mode
- * ... more to come
+ * ATTRIBUTES:
+ * - modecode code: An unambiguous int (enum) for the mode
+ * - ident *name: Name of this mode. Two modes are different if the name is different.
+ * - mode_sort sort: sort of mode specifying possible usage categories
+ * - int size: size of the mode in Bits.
+ * - unsigned sign:1: signedness of this mode
+ * - ... more to come
+ * - modulo_shift specifies for modes of kind irms_int_number
+ * whether shift applies modulo to value of bits to shift
*
- * SEE ALSO
+ * SEE ALSO:
* The tech report 1999-44 describing FIRM and predefined modes
* tarval.h
- ******/
-
+ */
+#ifndef _IR_MODE_TYPEDEF_
+#define _IR_MODE_TYPEDEF_
typedef struct ir_mode ir_mode;
+#endif
-/** ********** Predefined modes ********** **/
+/* ********** Predefined modes ********** */
/**
- * according to tech report 1999-14:
+ * Predefined mode according to tech report 1999-14.
*/
typedef enum { /* irm is short for `ir mode' */
- irm_BB, /**< basic block */
- irm_X, /**< execution */
- irm_F, /**< float(32) */
- irm_D, /**< double(64) */
- irm_E, /**< extended(80) */
- irm_Bs, /**< signed byte(8) */
- irm_Bu, /**< unsigned byte(8) */
- irm_Hs, /**< signed short(16) */
- irm_Hu, /**< unsigned short(16) */
- irm_Is, /**< signed int(32) */
- irm_Iu, /**< unsigned int(32) */
- irm_Ls, /**< signed long(64) */
- irm_Lu, /**< unsigned long(64) */
- irm_C, /**< character */
- irm_P, /**< pointer */
- irm_b, /**< internal boolean */
- irm_M, /**< memory */
- irm_T, /**< tuple */
- irm_U, /**< unicode character */
- irm_max /**< maximum value for modecode */
+ irm_BB, /**< basic block */
+ irm_X, /**< execution */
+ irm_F, /**< float(32) */
+ irm_D, /**< double(64) */
+ irm_E, /**< extended(80) */
+ irm_Bs, /**< signed byte(8) */
+ irm_Bu, /**< unsigned byte(8) */
+ irm_Hs, /**< signed short(16) */
+ irm_Hu, /**< unsigned short(16) */
+ irm_Is, /**< signed int(32) */
+ irm_Iu, /**< unsigned int(32) */
+ irm_Ls, /**< signed long(64) */
+ irm_Lu, /**< unsigned long(64) */
+ irm_C, /**< character */
+ irm_P, /**< pointer */
+ irm_b, /**< internal boolean */
+ irm_M, /**< memory */
+ irm_T, /**< tuple */
+ irm_U, /**< unicode character */
+ irm_ANY, /**< undefined mode */
+ irm_BAD, /**< bad mode */
+ irm_max /**< maximum value for modecode */
} modecode;
-/** These values represent the different arithmetics used to
- * manipulate values */
+/** These values represent the different mode classes of value representations.
+ */
typedef enum {
- /** Predefined sorts of modes **/
- auxiliary, /* Only for Firm use, predefined. */
- internal_boolean, /* Internal boolean representation.
- Storing to memory impossible, convert first. */
- /** user-extensible sorts of modes **/
- int_number, /* A mode to represent int numbers.
- Integer computations can be performed. */
- float_number, /* A mode to represent float numbers.
- Floating point computations can be performed. */
- reference, /* A mode to represent entities.
- Restricted int computations can be performed */
- character, /* A mode to represent characters/symbols
- ?? Are computations allowed? as int?? */
+ /* Predefined sorts of modes */
+ irms_auxiliary, /**< Only for Firm use. Not extensible. (irm_T) */
+ irms_control_flow, /**< Marks all control flow modes. Not extensible. (irm_BB, irm_X) */
+ irms_memory, /**< Marks the memory mode. Not extensible. (irm_M) */
+ irms_internal_boolean, /**< Internal boolean representation.
+ Storing to memory impossible, convert first. (irm_b) */
+ /* user-extensible sorts of modes */
+ irms_int_number, /**< A mode to represent int numbers.
+ Integer computations can be performed. */
+ irms_float_number, /**< A mode to represent float numbers.
+ Floating point computations can be performed. */
+ irms_reference, /**< A mode to represent entities.
+ Restricted int computations can be performed */
+ irms_character /**< A mode to represent characters/symbols
+ ?? Are computations allowed? as int?? */
} mode_sort;
-/** ********** Constructor for user defined modes **************** **/
+/** These values represent the different arithmetic operations possible with a mode.
+ Further arithmetics can be defined, e.g., for @@@ modes.
+ */
+typedef enum {
+ irma_uninitialized = 0,
+ irma_none = 1, /**< For modes for which no representation is specified.
+ These are modes of sort auxiliary, internal_boolean and character. */
+ irma_twos_complement = 2, /**< Values of the mode are represented as two's complement.
+ Only legal for modes of sort int_number and reference. */
+ irma_ones_complement, /**< Values of the mode are represented as one's complement.
+ Only legal for modes of sort int_number and reference. */
+ irma_int_BCD, /**< Values of the mode are represented as binary coded decimals.
+ Only legal for modes of sort int_number and reference. */
+ irma_ieee754 = 256, /**< Values of the mode are represented according to ieee754
+ floatingpoint standard. Only legal for modes of sort float_number. */
+ irma_float_BCD, /**< Values of the mode are represented as binary coded decimals
+ according to @@@ which standards??? Only legal for modes of
+ sort float_number. */
+ irma_max
+} mode_arithmetic;
+
+
+/* ********** Constructor for user defined modes **************** */
/**
- * register_mode(mode* new_mode)
+ * Creates a new mode.
*
- * Registers a new mode.
- * Must be called BEFORE init_mode2() !!!
+ * @param name the name of the mode to be created
+ * @param sort the mode_sort of the mode to be created
+ * @param bit_size number of bits this mode allocate
+ * @param sign non-zero if this is a signed mode
+ * @param arithmetic arithmetic operations possible with a mode
+ * @param modulo_shift Is ignored for modes other than integer.
*
- * The information for new mode is retrieved from the mode
- * struct passed as parameter, the code field is ignored.
- * The struct is copied into the internal mode array and the code
- * field will be set to a unique integer.
+ * This function constructs a new mode given by the parameters.
+ * If the parameters match an already defined mode, this mode is returned
+ * (including the default modes).
+ * If the mode is newly allocated, a new unique mode_code is chosen.
* Also, special value tarvals will be calculated such as null,
- * min, max and can be retrieved using the get_mode_* fuctions
+ * min, max and can be retrieved using the get_mode_* functions
*
- * If a mode with the given characteristics already exists,
- * it will be returned instead of creating a new one.
+ * @return
+ * The new mode or NULL on error.
*
- * The passed struct can be safely deallocated after the function
- * returns.
- * To access the new mode the returned mode pointer must be used!
+ * @note
+ * It is allowed to construct the default modes. So, a call
+ * new_ir_mode("Is", irms_int_number, 32, 1, irma_twos_complement, 32) will return mode_Is.
*/
-ir_mode *register_mode(ir_mode* new_mode);
+ir_mode *new_ir_mode(const char *name, mode_sort sort, int bit_size, int sign, mode_arithmetic arithmetic, unsigned int modulo_shift);
-/** ********** Access methods to read mode information *********** **/
+/**
+ * Creates a new vector mode.
+ *
+ * @param name the name of the mode to be created
+ * @param sort the mode_sort of the mode to be created
+ * @param bit_size number of bits for one element of this mode
+ * @param num_of_elem number of elements in this vector mode
+ * @param sign non-zero if this is a signed mode
+ * @param arithmetic arithmetic operations possible with a mode
+ * @param modulo_shift Is ignored for modes other than integer.
+ *
+ * This function constructs a new vector mode given by the parameters.
+ * If the parameters match an already defined mode, this mode is returned.
+ * If the mode is newly allocated, a new unique mode_code is chosen.
+ * Also, special value tarvals will be calculated such as null,
+ * min, max and can be retrieved using the get_mode_* functions
+ *
+ * @return
+ * The new mode or NULL on error.
+ */
+ir_mode *new_ir_vector_mode(const char *name, mode_sort sort, int bit_size, unsigned num_of_elem, int sign,
+ mode_arithmetic arithmetic, unsigned int modulo_shift);
-#ifdef MODE_ACCESS_DEFINES
-# include "irmode_t.h"
-# define get_mode_modecode(mode) (mode)->code
-# define get_mode_ident(mode) (mode)->name
-# define get_mode_name(mode) id_to_str((mode)->name)
-# define get_mode_sort(mode) (mode)->sort
-# define get_mode_size(mode) (mode)->size
-# define get_mode_align(mode) (mode)->align
-#else
-/* The classification of the mode */
-modecode get_mode_modecode(ir_mode *mode);
+/**
+ * Checks whether a pointer points to a mode.
+ *
+ * @param thing an arbitrary pointer
+ *
+ * @return
+ * true if the thing is a mode, else false
+ */
+int is_mode(void *thing);
-/* The ident* name of the mode */
-ident *get_mode_ident(ir_mode *mode);
+/* ********** Access methods to read mode information *********** */
-/* The null-terminated name of this mode */
-const char *get_mode_name(ir_mode *mode);
+/** Returns the classification of the mode */
+modecode get_mode_modecode(const ir_mode *mode);
-/* A coarse classification of the mode */
-mode_sort get_mode_sort(ir_mode *mode);
+/** Returns the ident* of the mode */
+ident *get_mode_ident(const ir_mode *mode);
-/* The size of values of the mode in bits. */
-int get_mode_size(ir_mode *mode);
+/** Returns the null-terminated name of this mode. */
+const char *get_mode_name(const ir_mode *mode);
-/* The alignment of values of the mode in bytes. */
-int get_mode_align(ir_mode *mode);
-#endif
+/** Returns a coarse classification of the mode. */
+mode_sort get_mode_sort(const ir_mode *mode);
+
+/** Returns the size of values of the mode in bits. */
+int get_mode_size_bits(const ir_mode *mode);
+
+/** Returns the size of values of the mode in bytes.
+ * If the size is not dividable by 8 returns -1. */
+int get_mode_size_bytes(const ir_mode *mode);
-/* The smallest representable value. For modes of the
- * sort float_number this is the most negative value
- * bigger than -infinit */
+/** Returns the signess of a mode.
+ *
+ * Returns the signess of a mode: 1 if mode is signed. */
+int get_mode_sign(const ir_mode *mode);
+
+/** Returns the arithmetic of a mode */
+int get_mode_arithmetic(const ir_mode *mode);
+
+/** Get the modulo shift attribute.
+ *
+ * Attribute modulo shift specifies for modes of kind irms_int_number
+ * whether shift applies modulo to value of bits to shift. Zero for
+ * modes that are not integer.
+ */
+unsigned int get_mode_modulo_shift(const ir_mode *mode);
+
+/** Return the number of vector elements.
+ *
+ * Attribute vector_elem specifies the number of vector elements of
+ * a vector mode. For non-vector modes it returns 1 for data and 0
+ * for all other modes
+ */
+unsigned int get_mode_n_vector_elems(const ir_mode *mode);
+
+/** Returns the stored intermediate information. */
+void *get_mode_link(const ir_mode *mode);
+
+/** Stores new intermediate information. */
+void set_mode_link(ir_mode *mode, void *l);
+
+/**
+ * Returns the smallest representable value of a given mode.
+ *
+ * For modes of the sort float_number this is the most negative value
+ * bigger than -infinite.
+ */
tarval *get_mode_min(ir_mode *mode);
-/* The biggest representable value. For modes of the
- * sort float_number this is the largest value lower
- * than infinit */
+/**
+ * Returns the biggest representable value o f a given mode.
+ *
+ * For modes of the sort float_number this is the largest value lower
+ * than infinite.
+ */
tarval *get_mode_max(ir_mode *mode);
-/* The value Zero represented in this mode
- Zero is the additive neutral element and as such
- is defined only for modes allowing addition, i.e.
- floats and ints, and references (NULL-Pointer)
- else returns tarval_bad */
+/**
+ * Returns the value Zero represented in this mode.
+ *
+ * Zero is the additive neutral element and as such
+ * is defined only for modes allowing addition, i.e.
+ * op_pin_state_floats and ints, and references (NULL-Pointer)
+ * else returns tarval_bad.
+ */
tarval *get_mode_null(ir_mode *mode);
-/* The value One, represented in this mode
+/**
+ * Returns the value One, represented in this mode.
+ *
* One, being the multiplicative neutral element,
* is defined only for modes allowing multiplication,
- * i.e. ints and floats */
+ * i.e. ints and floats.
+ */
tarval *get_mode_one(ir_mode *mode);
-/* This is only valid for float_numbers, other modes
- * will result in tarval_bad */
-tarval *get_mode_infinit(ir_mode *mode);
-
-/* This is only valid for float_numbers, other modes
- * will result in tarval_bad */
-tarval *get_mode_nan(ir_mode *mode);
-
-
-/** Auxiliary modes necessary for the Firm representation **/
-extern ir_mode *mode_T; /* tuple (none) */
-extern ir_mode *mode_X; /* execution */
-extern ir_mode *mode_M; /* memory */
-extern ir_mode *mode_BB; /* block */
-
-/** A set of predifined, numerical modes according to Techreport 1999-44 **/
-extern ir_mode *mode_F; /* signed float(32) */
-extern ir_mode *mode_D; /* signed double(64) */
-extern ir_mode *mode_E; /* signed extended(80) */
-extern ir_mode *mode_Bs; /* signed byte (former char) */
-extern ir_mode *mode_Bu; /* unsigned byte (former char) */
-extern ir_mode *mode_Hs; /* signed short integer */
-extern ir_mode *mode_Hu; /* unsigened short integer */
-extern ir_mode *mode_Is; /* signed integer */
-extern ir_mode *mode_Iu; /* unsigned integer */
-extern ir_mode *mode_Ls; /* signed long integer */
-extern ir_mode *mode_Lu; /* unsigned long integer */
-
-extern ir_mode *mode_b; /* internal boolean */
-extern ir_mode *mode_C; /* 8 bit char */
-extern ir_mode *mode_U; /* 16 bit unicode char */
-extern ir_mode *mode_P; /* pointer */
+/**
+ * Returns the value Minus One, represented in this mode.
+ *
+ * Minus One is defined only for modes allowing
+ * multiplication with signed values, i.e. signed ints and floats.
+ */
+tarval *get_mode_minus_one(ir_mode *mode);
+
+/**
+ * Returns the positive infinite value of a mode.
+ *
+ * This is only valid for float_numbers, other modes
+ * will result in tarval_bad.
+ */
+tarval *get_mode_infinite(ir_mode *mode);
+
+/**
+ * Returns the NAN value of a given mode.
+ *
+ * This is only valid for float_numbers, other modes
+ * will result in tarval_bad.
+ */
+tarval *get_mode_NAN(ir_mode *mode);
+
+extern ir_mode *mode_M; /**< memory */
+
+/* -- A set of predefined, numerical modes according to Techreport 1999-44 -- */
+extern ir_mode *mode_F; /**< signed float(32) */
+extern ir_mode *mode_D; /**< signed double(64) */
+extern ir_mode *mode_E; /**< signed extended(80) */
+extern ir_mode *mode_Bs; /**< signed byte (former char) */
+extern ir_mode *mode_Bu; /**< unsigned byte (former char) */
+extern ir_mode *mode_Hs; /**< signed short integer */
+extern ir_mode *mode_Hu; /**< unsigned short integer */
+extern ir_mode *mode_Is; /**< signed integer */
+extern ir_mode *mode_Iu; /**< unsigned integer */
+extern ir_mode *mode_Ls; /**< signed long integer */
+extern ir_mode *mode_Lu; /**< unsigned long integer */
+
+extern ir_mode *mode_C; /**< 8 bit char */
+extern ir_mode *mode_U; /**< 16 bit unicode char */
+
+extern ir_mode *mode_P; /**< pointer */
+extern ir_mode *mode_P_code; /**< A pointer mode that is set by the client of libfirm. This mode
+ represents the pointer size of the target machine code addresses. Is initialized
+ to mode_P. */
+extern ir_mode *mode_P_data; /**< A pointer mode that is set by the client of libfirm. This mode
+ represents the pointer size of the target machine data addresses. Is initialized
+ to mode_P. */
+
+/* -- Auxiliary modes necessary for the Firm representation -- */
+extern ir_mode *mode_b; /**< internal boolean */
+
+extern ir_mode *mode_X; /**< execution */
+extern ir_mode *mode_BB; /**< block */
+
+extern ir_mode *mode_T; /**< tuple (none) */
+extern ir_mode *mode_ANY;/**< undefined mode */
+extern ir_mode *mode_BAD;/**< bad mode */
/*@{*/
/** Access routines for JNI Interface */
-ir_mode *get_modeT(void);
ir_mode *get_modeF(void);
ir_mode *get_modeD(void);
ir_mode *get_modeE(void);
ir_mode *get_modeP(void);
ir_mode *get_modeb(void);
ir_mode *get_modeX(void);
-ir_mode *get_modeM(void);
ir_mode *get_modeBB(void);
+ir_mode *get_modeM(void);
+ir_mode *get_modeT(void);
+ir_mode *get_modeANY(void);
+ir_mode *get_modeBAD(void);
+
+/** Returns the machine specific pointer mode for code addresses. */
+ir_mode *get_modeP_code(void);
+
+/** Returns the machine specific pointer mode for data addresses. */
+ir_mode *get_modeP_data(void);
/**
- Functions to check, whether a modecode is signed, float, int, num, data,
- datab or dataM.
+ * Sets the machine specific pointer mode for code addresses.
+ * If not set, the predefined mode mode_P will be used.
+ */
+void set_modeP_code(ir_mode *p);
+
+/**
+ * Sets the machine specific pointer mode for data addresses.
+ * If not set, the predefined mode mode_P will be used.
+ */
+void set_modeP_data(ir_mode *p);
+
+/**
+ Functions to check, whether a modecode is signed, float, int, character,
+ reference, num, numP, data, datab or dataM.
For more exact definitions read the corresponding pages
- in the firm documentation or the followingenumeration
+ in the firm documentation or the following enumeration
The set of "float" is defined as:
float = {irm_F, irm_D, irm_E}
The set of "int" is defined as:
int = {irm_Bs, irm_Bu, irm_Hs, irm_Hu, irm_Is, irm_Iu, irm_Ls, irm_Lu}
+ The set of "character" is defined as:
+ character = {irm_C, irm_U}
+
+ The set of "reference" is defined as:
+ reference = {irm_P}
+
The set of "num" is defined as:
- num = {irm_F, irm_D, irm_E, irm_Bs, irm_Bu, irm_Hs, irm_Hu,
- irm_Is, irm_Iu, irm_Ls, irm_Lu}
- = {float || int}
+ num = {float || int}
+
+ The set of "numP" is defined as:
+ numP = {float || int || reference}
The set of "data" is defined as:
- data = {irm_F, irm_D, irm_E irm_Bs, irm_Bu, irm_Hs, irm_Hu,
- irm_Is, irm_Iu, irm_Ls, irm_Lu, irm_C, irm_U, irm_P}
- = {num || irm_C || irm_P}
+ data = {num || character || reference}
The set of "datab" is defined as:
- datab = {irm_F, irm_D, irm_E, irm_Bs, irm_Bu, irm_Hs, irm_Hu,
- irm_Is, irm_Iu, irm_Ls, irm_Lu, irm_C, irm_U, irm_P, irm_b}
- = {data || irm_b }
+ datab = {data || irm_b }
The set of "dataM" is defined as:
- dataM = {irm_F, irm_D, irm_E, irm_Bs, irm_Bu, irm_Hs, irm_Hu,
- irm_Is, irm_Iu, irm_Ls, irm_Lu, irm_C, irm_U, irm_P, irm_M}
- = {data || irm_M}
+ dataM = {data || irm_M}
+
+ Vector "int" and "float" are defined by the arithmetic and vector_elem > 1.
*/
/*@}*/
/* Test for a certain class of modes. */
-#ifdef MODE_ACCESS_DEFINES
-# define mode_is_signed(mode) (mode)->sign
-# define mode_is_float(mode) ((mode)->sort == float_number)
-# define mode_is_int(mode) ((mode)->sort == int_number)
-# define mode_is_num(mode) (((mode)->sort == float_number) || ((mode)->sort == int_number))
-# define mode_is_data(mode) (((mode)->sort == float_number) || ((mode)->sort == int_number) || ((mode)->sort == character) || ((mode)->sort == reference))
-# define mode_is_datab(mode) (((mode)->sort == float_number) || ((mode)->sort == int_number) || ((mode)->sort == character) || ((mode)->sort == reference) || ((mode)->sort == internal_boolean))
-# define mode_is_dataM(mode) (((mode)->sort == float_number) || ((mode)->sort == int_number) || ((mode)->sort == character) || ((mode)->sort == reference) || ((mode)->code == irm_M))
-#else
-int mode_is_signed (ir_mode *mode);
-int mode_is_float (ir_mode *mode);
-int mode_is_int (ir_mode *mode);
-int mode_is_num (ir_mode *mode);
-int mode_is_data (ir_mode *mode);
-int mode_is_datab (ir_mode *mode);
-int mode_is_dataM (ir_mode *mode);
-#endif
+int mode_is_signed (const ir_mode *mode);
+int mode_is_float (const ir_mode *mode);
+int mode_is_int (const ir_mode *mode);
+int mode_is_character (const ir_mode *mode);
+int mode_is_reference (const ir_mode *mode);
+int mode_is_num (const ir_mode *mode);
+int mode_is_numP (const ir_mode *mode);
+int mode_is_data (const ir_mode *mode);
+int mode_is_datab (const ir_mode *mode);
+int mode_is_dataM (const ir_mode *mode);
+int mode_is_float_vector (const ir_mode *mode);
+int mode_is_int_vector (const ir_mode *mode);
+
/** Returns true if sm can be converted to lm without loss
according to firm definiton */
-bool smaller_mode(ir_mode *sm, ir_mode *lm);
+int smaller_mode(const ir_mode *sm, const ir_mode *lm);
+
+/**
+ * Returns a matching unsigned mode for a given integer signed mode.
+ * Returns NULL if no matching mode exists.
+ */
+ir_mode *find_unsigned_mode(const ir_mode *mode);
+
+/**
+ * Returns a matching signed mode for a given integer unsigned mode.
+ * Returns NULL if no matching mode exists.
+ */
+ir_mode *find_signed_mode(const ir_mode *mode);
+
+/**
+ * Returns an integer mode with 2*n bits for a given integer mode with n bits.
+ * Returns NULL if no matching mode exists.
+ */
+ir_mode *find_double_bits_int_mode(const ir_mode *mode);
-/** mode module initialization, call once before use of any other function **/
-void init_mode (void);
+/**
+ * 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);
+
+/**
+ * Returns non-zero if the given mode might overflow on unary Minus.
+ */
+int mode_overflow_on_unary_Minus(const ir_mode *mode);
+
+/**
+ * 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);
+
+/**
+ * Return the signed integer equivalent mode for an reference mode.
+ */
+ir_mode *get_reference_mode_signed_eq(ir_mode *mode);
+
+/**
+ * Sets the signed integer equivalent mode for an reference mode.
+ */
+void set_reference_mode_signed_eq(ir_mode *ref_mode, ir_mode *int_mode);
+
+/**
+ * Return the unsigned integer equivalent mode for an reference mode.
+ */
+ir_mode *get_reference_mode_unsigned_eq(ir_mode *mode);
+
+/**
+ * Sets the unsigned integer equivalent mode for an reference mode.
+ */
+void set_reference_mode_unsigned_eq(ir_mode *ref_mode, ir_mode *int_mode);
-# endif /* _IRMODE_H_ */
+#endif /* _FIRM_IR_IRMODE_H_ */
projects / libfirm / blobdiff