X-Git-Url: http://nsz.repo.hu/git/?a=blobdiff_plain;f=ir%2Fir%2Firmode.h;h=f6e3e6ee20e6744fdffea5657bb94892abc7e538;hb=fed1bdc07c9ec7b4d07a9243ad093c9fdd239fbd;hp=94adf3e07621f3255a8ae4e204689f26fb2fd04e;hpb=1de1f97f832ee50c6630754320f1c15393cc7929;p=libfirm diff --git a/ir/ir/irmode.h b/ir/ir/irmode.h index 94adf3e07..f6e3e6ee2 100644 --- a/ir/ir/irmode.h +++ b/ir/ir/irmode.h @@ -29,24 +29,20 @@ #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. * - unsigned sign:1: signedness of this mode * - ... more to come @@ -57,7 +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 ********** */ @@ -146,9 +145,9 @@ 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. @@ -162,19 +161,19 @@ ir_mode *new_ir_mode(const char *name, mode_sort sort, int bit_size, int sign, m /** * 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 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. @@ -247,7 +246,7 @@ 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); @@ -255,7 +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); @@ -274,10 +273,18 @@ tarval *get_mode_null(ir_mode *mode); * * One, being the multiplicative neutral element, * is defined only for modes allowing multiplication, - * i.e. ints and op_pin_state_floats. + * i.e. ints and floats. */ 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. * @@ -296,14 +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 */ @@ -313,8 +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 -- */ @@ -351,14 +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 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. + * Sets the machine specific pointer mode for data addresses. * If not set, the predefined mode mode_P will be used. */ -void set_modeP_mach(ir_mode *p); +void set_modeP_data(ir_mode *p); /** Functions to check, whether a modecode is signed, float, int, character, @@ -439,4 +458,17 @@ ir_mode *find_double_bits_int_mode(const ir_mode *mode); */ 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_ */