X-Git-Url: http://nsz.repo.hu/git/?a=blobdiff_plain;f=ir%2Ftv%2Ffltcalc.h;h=067e3b84f6e2042e930bf250bc5318ef4e724fec;hb=0481fff9d8163639a6cac25b6db008f745658d32;hp=1f5891644bc84576fd66b3e885853e053665b292;hpb=4316c00364a6ec0ac7f7aef14af3667b12f96cf3;p=libfirm diff --git a/ir/tv/fltcalc.h b/ir/tv/fltcalc.h index 1f5891644..067e3b84f 100644 --- a/ir/tv/fltcalc.h +++ b/ir/tv/fltcalc.h @@ -1,5 +1,5 @@ /* - * Copyright (C) 1995-2007 University of Karlsruhe. All right reserved. + * Copyright (C) 1995-2008 University of Karlsruhe. All right reserved. * * This file is part of libFirm. * @@ -28,6 +28,7 @@ #define FIRM_TV_FLTCALC_H #include "firm_config.h" +#include "firm_types.h" #ifdef HAVE_LONG_DOUBLE /* XXX Set this via autoconf */ @@ -37,33 +38,25 @@ typedef long double LLDBL; typedef double LLDBL; #endif -typedef enum { - FC_add, /**< addition */ - FC_sub, /**< subtraction */ - FC_mul, /**< multiplication */ - FC_div, /**< divide */ - FC_neg, /**< negate */ - FC_int, /**< truncate to integer */ - FC_rnd /**< round to integer */ -} fc_op_t; - enum { - FC_DEC, - FC_HEX, - FC_BIN, - FC_PACKED + FC_DEC, + FC_HEX, + FC_BIN, + FC_PACKED }; /** IEEE-754 Rounding modes. */ typedef enum { - FC_TONEAREST, /**< if unsure, to the nearest even */ - FC_TOPOSITIVE, /**< to +oo */ - FC_TONEGATIVE, /**< to -oo */ - FC_TOZERO /**< to 0 */ + FC_TONEAREST, /**< if unsure, to the nearest even */ + FC_TOPOSITIVE, /**< to +oo */ + FC_TONEGATIVE, /**< to -oo */ + FC_TOZERO /**< to 0 */ } fc_rounding_mode_t; #define FC_DEFAULT_PRECISION 64 +typedef struct _fp_value fp_value; + /*@{*/ /** internal buffer access * All functions that accept NULL as return buffer put their result into an @@ -75,7 +68,7 @@ const void *fc_get_buffer(void); int fc_get_buffer_length(void); /*}@*/ -char *fc_val_from_str(const char *str, unsigned int len, char exp_size, char mant_size, char *result); +void *fc_val_from_str(const char *str, unsigned int len, char exp_size, char mant_size, void *result); /** get the representation of a floating point value * This function tries to builds a representation having the same value as the @@ -94,7 +87,7 @@ char *fc_val_from_str(const char *str, unsigned int len, char exp_size, char man * @return The result pointer passed to the function. If this was NULL this returns * a pointer to the internal accumulator buffer */ -char *fc_val_from_float(LLDBL l, char exp_size, char mant_size, char *result); +fp_value *fc_val_from_ieee754(LLDBL l, char exp_size, char mant_size, fp_value *result); /** retrieve the float value of an internal value * This function casts the internal value to LLDBL and returns a LLDBL with @@ -106,7 +99,7 @@ char *fc_val_from_float(LLDBL l, char exp_size, char mant_size, char *result); * @param val The representation of a float value * @return a float value approximating the represented value */ -LLDBL fc_val_to_float(const void *val); +LLDBL fc_val_to_ieee754(const fp_value *val); /** cast a value to another precision * This function changes the precision of a float representation. @@ -123,7 +116,7 @@ LLDBL fc_val_to_float(const void *val); * @return The result pointer passed to the function. If this was NULL this returns * a pointer to the internal accumulator buffer */ -char *fc_cast(const void *val, char exp_size, char mant_size, char *result); +fp_value *fc_cast(const fp_value *val, char exp_size, char mant_size, fp_value *result); /*@{*/ /** build a special float value @@ -141,29 +134,29 @@ char *fc_cast(const void *val, char exp_size, char mant_size, char *result); * @return The result pointer passed to the function. If this was NULL this returns * a pointer to the internal accumulator buffer */ -char *fc_get_min(unsigned int exponent_size, unsigned int mantissa_size, char* result); -char *fc_get_max(unsigned int exponent_size, unsigned int mantissa_size, char* result); -char *fc_get_snan(unsigned int exponent_size, unsigned int mantissa_size, char* result); -char *fc_get_qnan(unsigned int exponent_size, unsigned int mantissa_size, char* result); -char *fc_get_plusinf(unsigned int exponent_size, unsigned int mantissa_size, char* result); -char *fc_get_minusinf(unsigned int exponent_size, unsigned int mantissa_size, char* result); +fp_value *fc_get_min(unsigned int exponent_size, unsigned int mantissa_size, fp_value *result); +fp_value *fc_get_max(unsigned int exponent_size, unsigned int mantissa_size, fp_value *result); +fp_value *fc_get_snan(unsigned int exponent_size, unsigned int mantissa_size, fp_value *result); +fp_value *fc_get_qnan(unsigned int exponent_size, unsigned int mantissa_size, fp_value *result); +fp_value *fc_get_plusinf(unsigned int exponent_size, unsigned int mantissa_size, fp_value *result); +fp_value *fc_get_minusinf(unsigned int exponent_size, unsigned int mantissa_size, fp_value *result); /*@}*/ -int fc_is_zero(const void *a); -int fc_is_negative(const void *a); -int fc_is_inf(const void *a); -int fc_is_nan(const void *a); -int fc_is_subnormal(const void *a); +int fc_is_zero(const fp_value *a); +int fc_is_negative(const fp_value *a); +int fc_is_inf(const fp_value *a); +int fc_is_nan(const fp_value *a); +int fc_is_subnormal(const fp_value *a); -char *fc_add(const void *a, const void *b, void *result); -char *fc_sub(const void *a, const void *b, void *result); -char *fc_mul(const void *a, const void *b, void *result); -char *fc_div(const void *a, const void *b, void *result); -char *fc_neg(const void *a, void *result); -char *fc_int(const void *a, void *result); -char *fc_rnd(const void *a, void *result); +fp_value *fc_add(const fp_value *a, const fp_value *b, fp_value *result); +fp_value *fc_sub(const fp_value *a, const fp_value *b, fp_value *result); +fp_value *fc_mul(const fp_value *a, const fp_value *b, fp_value *result); +fp_value *fc_div(const fp_value *a, const fp_value *b, fp_value *result); +fp_value *fc_neg(const fp_value *a, fp_value *result); +fp_value *fc_int(const fp_value *a, fp_value *result); +fp_value *fc_rnd(const fp_value *a, fp_value *result); -char *fc_print(const void *a, char *buf, int buflen, unsigned base); +char *fc_print(const fp_value *a, char *buf, int buflen, unsigned base); /** Compare two values * This function compares two values @@ -176,7 +169,27 @@ char *fc_print(const void *a, char *buf, int buflen, unsigned base); * 1 if a > b * 2 if either value is NaN */ -int fc_comp(const void *a, const void *b); +int fc_comp(const fp_value *a, const fp_value *b); + +/** + * Converts an floating point value into an integer value. + */ +int fc_flt2int(const fp_value *a, void *result, ir_mode *dst_mode); + +/** + * Returns non-zero if the mantissa is zero, i.e. 1.0Exxx + */ +int fc_zero_mantissa(const fp_value *value); + +/** + * Returns the exponent of a value. + */ +int fc_get_exponent(const fp_value *value); + +/** + * Return non-zero if a given value can be converted lossless into another precision. + */ +int fc_can_lossless_conv_to(const fp_value *value, char exp_size, char mant_size); /** Set new rounding mode * This function sets the rounding mode to one of the following, returning @@ -243,7 +256,21 @@ fc_rounding_mode_t fc_get_rounding_mode(void); * byte. * @return 8 bits of encoded data */ -unsigned char fc_sub_bits(const void *val, unsigned num_bit, unsigned byte_ofs); +unsigned char fc_sub_bits(const fp_value *val, unsigned num_bit, unsigned byte_ofs); + +/** + * Set the immediate precision for IEEE-754 results. Set this to + * 0 to get the same precision as the operands. + * For x87 compatibility, set this to 80. + * + * @return the old setting + */ +unsigned fc_set_immediate_precision(unsigned bits); + +/** + * Returns non-zero if the result of the last operation was exact. + */ +int fc_is_exact(void); void init_fltcalc(int precision); void finish_fltcalc(void);