X-Git-Url: http://nsz.repo.hu/git/?a=blobdiff_plain;f=ir%2Fir%2Firmode.h;h=f6e3e6ee20e6744fdffea5657bb94892abc7e538;hb=d904350bc3a4b3b9c77a71d683be6c44b041a33d;hp=0a24a0523c5fff3281c67a040eb879895e39786d;hpb=8dc4091a707bf66377da637d17cb20080847bf1c;p=libfirm diff --git a/ir/ir/irmode.h b/ir/ir/irmode.h index 0a24a0523..f6e3e6ee2 100644 --- a/ir/ir/irmode.h +++ b/ir/ir/irmode.h @@ -29,26 +29,21 @@ #ifndef _IRMODE_H_ #define _IRMODE_H_ +#include "firm_types.h" #include "ident.h" -#ifndef _TARVAL_TYPEDEF_ -#define _TARVAL_TYPEDEF_ - typedef struct tarval tarval; -#endif - /** * Contains relevant information about a mode. * - * Neccessary information about a mode is stored in this struct + * 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 (enum) for the mode + * - 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 kategories + * - mode_sort sort: sort of mode specifying possible usage categories * - int size: size of the mode in Bits. - * - int align: byte alignment * - unsigned sign:1: signedness of this mode * - ... more to come * - modulo_shift specifies for modes of kind irms_int_number @@ -58,7 +53,10 @@ * 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 ********** */ @@ -140,7 +138,6 @@ typedef enum { * @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 * @param arithmetic arithmetic operations possible with a mode * @param modulo_shift Is ignored for modes other than integer. @@ -148,41 +145,40 @@ typedef enum { * 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. + * 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 * * @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, irma_twos_complement, 32) will return mode_Is. + * new_ir_mode("Is", irms_int_number, 32, 1, irma_twos_complement, 32) will return mode_Is. */ -ir_mode *new_ir_mode(const char *name, mode_sort sort, int bit_size, int align, int sign, mode_arithmetic arithmetic, unsigned int modulo_shift); +ir_mode *new_ir_mode(const char *name, mode_sort sort, int bit_size, int sign, mode_arithmetic arithmetic, unsigned int modulo_shift); /** * 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 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 align the byte alignment for an entity of this mode (in bits) - * @param sign non-zero if this is a signed 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 choosen. + * 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 * * @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 align, int sign, +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 ); /** @@ -193,63 +189,64 @@ ir_mode *new_ir_vector_mode(const char *name, mode_sort sort, int bit_size, unsi * @return * true if the thing is a mode, else false */ -int is_mode (void *thing); +int is_mode(void *thing); /* ********** Access methods to read mode information *********** */ /** Returns the classification of the mode */ -modecode get_mode_modecode(const ir_mode *mode); +modecode get_mode_modecode(const ir_mode *mode); /** Returns the ident* of the mode */ -ident *get_mode_ident(const ir_mode *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); +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. */ +/** 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. * * Returns the signess of a mode: 1 if mode is signed. */ -int get_mode_sign (const ir_mode *mode); +int get_mode_sign(const ir_mode *mode); /** Returns the arithmetic of a mode */ -int get_mode_arithmetic (const ir_mode *mode); +int get_mode_arithmetic(const ir_mode *mode); -/** Attribute modulo shift specifies for modes of kind irms_int_number +/** 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); -/** Attribute vector_elem specifies the number of vector elements of +/** 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_vector_elems(const ir_mode *mode); +unsigned int get_mode_n_vector_elems(const ir_mode *mode); /** Returns the stored intermediate information. */ -void* get_mode_link(const ir_mode *mode); +void *get_mode_link(const ir_mode *mode); /** Stores new intermediate information. */ -void set_mode_link(ir_mode *mode, void *l); +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 -infinit. + * bigger than -infinite. */ tarval *get_mode_min(ir_mode *mode); @@ -257,7 +254,7 @@ 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. + * than infinite. */ tarval *get_mode_max(ir_mode *mode); @@ -266,7 +263,7 @@ tarval *get_mode_max(ir_mode *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) + * op_pin_state_floats and ints, and references (NULL-Pointer) * else returns tarval_bad. */ tarval *get_mode_null(ir_mode *mode); @@ -280,6 +277,14 @@ tarval *get_mode_null(ir_mode *mode); */ tarval *get_mode_one(ir_mode *mode); +/** + * 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. * @@ -298,14 +303,14 @@ tarval *get_mode_NAN(ir_mode *mode); extern ir_mode *mode_M; /**< memory */ -/* -- A set of predifined, numerical modes according to Techreport 1999-44 -- */ +/* -- 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; /**< unsigened 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 */ @@ -315,8 +320,11 @@ 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_mach; /**< A pointer mode that is set by the client of libfirm. This mode - represents the pointer size of the target machine. Is initialized +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 -- */ @@ -353,14 +361,23 @@ ir_mode *get_modeT(void); ir_mode *get_modeANY(void); ir_mode *get_modeBAD(void); -/** Returns the machine specific pointer mode. */ -ir_mode *get_modeP_mach(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); /** - * Sets the machine specific pointer mode. + * Sets the machine specific pointer mode for code addresses. * If not set, the predefined mode mode_P will be used. */ -void set_modeP_mach(ir_mode *p); +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, @@ -417,10 +434,41 @@ int mode_is_int_vector (const ir_mode *mode); according to firm definiton */ 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); +/** + * 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 finalization. frees all memory. */ -void finish_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-aound + * logic, especially (a + x) - x == a. + * This is normally true for integer modes, not for floating + * point modes. + */ +int mode_wrap_around(const ir_mode *mode); #endif /* _IRMODE_H_ */