/* Copyright (C) 1998 - 2000 by Universitaet Karlsruhe
-* All rights reserved.
-*/
+ * All rights reserved.
+ */
+/* $Id$ */
/**
* @file irmode.h
+ * irmode -- Modes for ir operators
*
- * Modes for ir operators.
+ * @author Christian Schaefer, Matthias Heil
*
- * @author Christian Schaefer
+ * 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.
*
- * This module specifies the modes that type the firm nodes. See
- * UKA tech report 1999-14 for more information about modes.
+ * SEE ALSO:
+ * UKA tech report 1999-44 for more information about modes.
*
- * @todo
- * This file is at the level of the original fiasco. It needs to be ported
- * to the version of the tech report!!! This will be done with the
- * reimplementation of the tarval module.
*/
-
-/* $Id$ */
-
-# ifndef _IRMODE_H_
-# define _IRMODE_H_
+#ifndef _IRMODE_H_
+#define _IRMODE_H_
#include "ident.h"
-#include <stdbool.h>
-
-# define target_bits 8
-
-# define NUM_MODES 20
#ifndef _TARVAL_TYPEDEF_
#define _TARVAL_TYPEDEF_
-typedef struct tarval tarval;
+ typedef struct tarval tarval;
#endif
/**
- * according to tech report 1999-14:
+ * Contains relevant information about a mode.
+ *
+ * Neccessary 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 (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 kategories
+ * - int size: size of the mode in Bits.
+ * - int align: byte alignment
+ * - unsigned sign:1: signedness of this mode
+ * - ... more to come
+ *
+ * SEE ALSO:
+ * The tech report 1999-44 describing FIRM and predefined modes
+ * tarval.h
+ */
+typedef struct ir_mode ir_mode;
+
+/* ********** Predefined modes ********** */
+
+/**
+ * Predefined mode according to tech report 1999-14.
*/
typedef enum { /* irm is short for `ir mode' */
irm_BB, /**< basic block */
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;
-typedef struct ir_mode ir_mode;
+/** These values represent the different mode classes of value representations.
+ */
+typedef enum {
+ /* Predefined sorts of modes */
+ irms_auxiliary, /**< Only for Firm use. Not extensible. (irm_T, irm_ANY, irm_BAD) */
+ /* 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;
+
+/** 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 standars??? Only legal for modes of
+ sort float_number. */
+ irma_max
+} mode_arithmetic;
+
+
+/* ********** Constructor for user defined modes **************** */
+/**
+ * Creates a new 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 this mode allocate
+ * @param align the byte alignment for an entity of this mode (in bits)
+ * @param sign non-zero if this is a signed mode
+ *
+ * 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 choosen.
+ * Also, special value tarvals will be calculated such as null,
+ * min, max and can be retrieved using the get_mode_* fuctions
+ *
+ * @return
+ * The new mode or NULL on error.
+ *
+ * @note
+ * It is allowed to construct the default modes. So, a call
+ * new_ir_mode("Is", irms_int_number, 32, 4, 1) will return mode_Is.
+ */
+ir_mode *new_ir_mode(const char *name, mode_sort sort, int bit_size, int align, int sign);
+
+/* ********** Access methods to read mode information *********** */
+
+/** Returns the classification of the mode */
+modecode get_mode_modecode(const ir_mode *mode);
+
+/** Returns the ident* of the mode */
+ident *get_mode_ident(const ir_mode *mode);
+
+/** Returns the null-terminated name of this mode. */
+const char *get_mode_name(const ir_mode *mode);
+
+/** 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);
+
+/** Returns the alignment of values of the mode in bytes. */
+int get_mode_align(const ir_mode *mode);
+/** Returns the signess of a mode */
+int get_mode_sign (const ir_mode *mode);
+
+/**
+ * Returns the smallest representable value of a given mode.
+ *
+ * For modes of the sort float_number this is the most negative value
+ * bigger than -infinit.
+ */
+tarval *get_mode_min(ir_mode *mode);
+
+/**
+ * Returns the biggest representable value o f a given mode.
+ *
+ * For modes of the sort float_number this is the largest value lower
+ * than infinit.
+ */
+tarval *get_mode_max(ir_mode *mode);
+
+/**
+ * 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.
+ * floats and ints, and references (NULL-Pointer)
+ * else returns tarval_bad.
+ */
+tarval *get_mode_null(ir_mode *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.
+ */
+tarval *get_mode_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);
+
+/* -- 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_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_C; /**< char */
-extern ir_mode *mode_U; /**< unicode char */
-extern ir_mode *mode_P; /**< pointer */
+
extern ir_mode *mode_b; /**< internal boolean */
-extern ir_mode *mode_X; /**< execution */
-extern ir_mode *mode_M; /**< memory */
-extern ir_mode *mode_BB; /**< block */
+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_ANY;/**< undefined mode */
+extern ir_mode *mode_BAD;/**< bad mode */
/*@{*/
/** Access routines for JNI Interface */
ir_mode *get_modeX(void);
ir_mode *get_modeM(void);
ir_mode *get_modeBB(void);
-/*@}*/
-
-/** An enum for this mode */
-modecode get_mode_modecode (ir_mode *mode);
-/* void set_mode_modecode (ir_mode *mode, modecode code); */
-
-/** The ident of this mode */
-ident *get_mode_ident (ir_mode *mode);
-/* void set_mode_ident (ir_mode *mode, ident *id); */
-
-/** The name of this mode */
-const char *get_mode_name (ir_mode *mode);
-/* void set_mode_name (ir_mode *mode, char *name); */
-
-/** The size of values of the mode in bytes. */
-int get_mode_size (ir_mode *mode);
-/* void set_mode_size (ir_mode *mode, int size); */
-
-/** The alignment of values of the mode. */
-int get_mode_ld_align (ir_mode *mode);
-/* void set_mode_ld_align (ir_mode *mode, int ld_align); */
+ir_mode *get_modeANY(void);
+ir_mode *get_modeBAD(void);
-/** The smallest representable value */
-tarval *get_mode_min (ir_mode *mode);
-/* void set_mode_min (ir_mode *mode, tarval *min); */
-
-/** The biggest representable value */
-tarval *get_mode_max (ir_mode *mode);
-/* void set_mode_max (ir_mode *mode, tarval *max); */
-
-/** The value Zero represented in this mode */
-tarval *get_mode_null (ir_mode *mode);
-/* void set_mode_null (ir_mode *mode, tarval *null); */
-
-/** Returns 1 if mode is signed, else 0. */
-unsigned get_mode_fsigned (ir_mode *mode);
-/* void set_mode_fsigned (ir_mode *mode, unsigned fsigned); */
-
-/** Returns 1 if mode is float, else 0. */
-unsigned get_mode_ffloat (ir_mode *mode);
-/* void set_mode_ffloat (ir_mode *mode, unsigned ffloat); */
-
-/*@{*/
/**
Functions to check, whether a modecode is signed, float, int, num, data,
datab or dataM.
For more exact definitions read the corresponding pages
- in the firm documentation or the followingenumeration
+ in the firm documentation or the following enumeration
The set of "float" is defined as:
float = {irm_F, irm_D, irm_E}
irm_Is, irm_Iu, irm_Ls, irm_Lu, irm_C, irm_U, irm_P, irm_M}
= {data || irm_M}
*/
-
-/* Test for a certain class of modes. */
-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);
/*@}*/
+/* Test for a certain class of modes. */
+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_data (const ir_mode *mode);
+int mode_is_datab (const ir_mode *mode);
+int mode_is_dataM (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);
+
+/** mode module initialization, call once before use of any other function **/
+void init_mode (void);
-# endif /* _IRMODE_H_ */
+#endif /* _IRMODE_H_ */
projects / libfirm / blobdiff