X-Git-Url: http://nsz.repo.hu/git/?a=blobdiff_plain;f=ir%2Ftv%2Ffltcalc.h;h=c41257ea0c6a4a4327095c49163d0d947f9a41ff;hb=7d61ad5fbb6a87bea369c8a01103a92d9ab79a48;hp=a71e779fb9d09fad406bf75634175976ed632db1;hpb=5244f95767968d8b59ef3f2031612b86474e2455;p=libfirm diff --git a/ir/tv/fltcalc.h b/ir/tv/fltcalc.h index a71e779fb..c41257ea0 100644 --- a/ir/tv/fltcalc.h +++ b/ir/tv/fltcalc.h @@ -22,20 +22,13 @@ * @brief tarval floating point calculations * @date 2003 * @author Mathias Heil - * @version $Id$ */ #ifndef FIRM_TV_FLTCALC_H #define FIRM_TV_FLTCALC_H +#include #include "firm_types.h" - -#ifdef HAVE_LONG_DOUBLE -/* XXX Set this via autoconf */ -#define HAVE_EXPLICIT_ONE -typedef long double LLDBL; -#else -typedef double LLDBL; -#endif +#include "irtypes.h" enum { FC_DEC, @@ -58,23 +51,13 @@ typedef enum { * possible float states */ typedef enum { - NORMAL, /**< normal representation, implicit 1 */ - ZERO, /**< +/-0 */ - SUBNORMAL, /**< denormals, implicit 0 */ - INF, /**< +/-oo */ - NAN, /**< Not A Number */ + FC_NORMAL, /**< normal representation, implicit 1 */ + FC_ZERO, /**< +/-0 */ + FC_SUBNORMAL, /**< denormals, implicit 0 */ + FC_INF, /**< +/-oo */ + FC_NAN, /**< Not A Number */ } value_class_t; -/** - * A descriptor for an IEEE float value. - */ -typedef struct ieee_descriptor_t { - unsigned char exponent_size; /**< size of exponent in bits */ - unsigned char mantissa_size; /**< size of mantissa in bits */ - unsigned char explicit_one; /**< set if the leading one is explicit */ - unsigned char clss; /**< state of this float */ -} ieee_descriptor_t; - struct fp_value; typedef struct fp_value fp_value; @@ -89,14 +72,14 @@ const void *fc_get_buffer(void); int fc_get_buffer_length(void); /*}@*/ -void *fc_val_from_str(const char *str, size_t len, const ieee_descriptor_t *desc, void *result); +void *fc_val_from_str(const char *str, size_t len, const float_descriptor_t *desc, void *result); /** get the representation of a floating point value * This function tries to builds a representation having the same value as the * float number passed. - * If the wished precision is less than the precision of LLDBL the value built - * will be rounded. Therefore only an approximation of the passed float can be - * expected in this case. + * If the wished precision is less than the precision of long double the value + * built will be rounded. Therefore only an approximation of the passed float + * can be expected in this case. * * @param l The floating point number to build a representation for * @param desc The floating point descriptor @@ -108,12 +91,13 @@ void *fc_val_from_str(const char *str, size_t len, const ieee_descriptor_t *desc * @return The result pointer passed to the function. If this was NULL this returns * a pointer to the internal accumulator buffer */ -fp_value *fc_val_from_ieee754(LLDBL l, const ieee_descriptor_t *desc, fp_value *result); +fp_value *fc_val_from_ieee754(long double l, const float_descriptor_t *desc, + fp_value *result); /** retrieve the float value of an internal value - * This function casts the internal value to LLDBL and returns a LLDBL with - * that value. - * This implies that values of higher precision than LLDBL are subject to + * This function casts the internal value to long double and returns a + * long double with that value. + * This implies that values of higher precision than long double are subject to * rounding, so the returned value might not the same than the actually * represented value. * @@ -121,7 +105,7 @@ fp_value *fc_val_from_ieee754(LLDBL l, const ieee_descriptor_t *desc, fp_value * * * @return a float value approximating the represented value */ -LLDBL fc_val_to_ieee754(const fp_value *val); +long double fc_val_to_ieee754(const fp_value *val); /** cast a value to another precision * This function changes the precision of a float representation. @@ -137,7 +121,7 @@ LLDBL fc_val_to_ieee754(const fp_value *val); * @return The result pointer passed to the function. If this was NULL this returns * a pointer to the internal accumulator buffer */ -fp_value *fc_cast(const fp_value *val, const ieee_descriptor_t *desc, fp_value *result); +fp_value *fc_cast(const fp_value *val, const float_descriptor_t *desc, fp_value *result); /*@{*/ /** build a special float value @@ -152,12 +136,12 @@ fp_value *fc_cast(const fp_value *val, const ieee_descriptor_t *desc, fp_value * * @return The result pointer passed to the function. If this was NULL this returns * a pointer to the internal accumulator buffer */ -fp_value *fc_get_min(const ieee_descriptor_t *desc, fp_value *result); -fp_value *fc_get_max(const ieee_descriptor_t *desc, fp_value *result); -fp_value *fc_get_snan(const ieee_descriptor_t *desc, fp_value *result); -fp_value *fc_get_qnan(const ieee_descriptor_t *desc, fp_value *result); -fp_value *fc_get_plusinf(const ieee_descriptor_t *desc, fp_value *result); -fp_value *fc_get_minusinf(const ieee_descriptor_t *desc, fp_value *result); +fp_value *fc_get_min(const float_descriptor_t *desc, fp_value *result); +fp_value *fc_get_max(const float_descriptor_t *desc, fp_value *result); +fp_value *fc_get_snan(const float_descriptor_t *desc, fp_value *result); +fp_value *fc_get_qnan(const float_descriptor_t *desc, fp_value *result); +fp_value *fc_get_plusinf(const float_descriptor_t *desc, fp_value *result); +fp_value *fc_get_minusinf(const float_descriptor_t *desc, fp_value *result); /*@}*/ int fc_is_zero(const fp_value *a); @@ -207,7 +191,7 @@ 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, const ieee_descriptor_t *desc); +int fc_can_lossless_conv_to(const fp_value *value, const float_descriptor_t *desc); /** Set new rounding mode * This function sets the rounding mode to one of the following, returning @@ -276,15 +260,6 @@ fc_rounding_mode_t fc_get_rounding_mode(void); */ 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. */