/*
= = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = =
This C header file is part of the SoftFloat IEC / IEEE Floating - point
Arithmetic Package , Release 2 .
Written by John R . Hauser . This work was made possible in part by the
International Computer Science Institute , located at Suite 600 , 1947 Center
Street , Berkeley , California 94704 . Funding was partially provided by the
National Science Foundation under grant MIP - 9311980 . The original version
of this code was written as part of a project to build a fixed - point vector
processor in collaboration with the University of California at Berkeley ,
overseen by Profs . Nelson Morgan and John Wawrzynek . More information
is available through the Web page
http : //www.jhauser.us/arithmetic/SoftFloat-2b/SoftFloat-source.txt
THIS SOFTWARE IS DISTRIBUTED AS IS , FOR FREE . Although reasonable effort
has been made to avoid it , THIS SOFTWARE MAY CONTAIN FAULTS THAT WILL AT
TIMES RESULT IN INCORRECT BEHAVIOR . USE OF THIS SOFTWARE IS RESTRICTED TO
PERSONS AND ORGANIZATIONS WHO CAN AND WILL TAKE FULL RESPONSIBILITY FOR ANY
AND ALL LOSSES , COSTS , OR OTHER PROBLEMS ARISING FROM ITS USE .
Derivative works are acceptable , even for commercial purposes , so long as
( 1 ) they include prominent notice that the work is derivative , and ( 2 ) they
include prominent notice akin to these three paragraphs for those parts of
this code that are retained .
= = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = =
*/
#ifndef __SOFTFLOAT_H__
#define __SOFTFLOAT_H__
/*
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The macro ` FLOATX80 ' must be defined to enable the extended double - precision
floating - point format ` floatx80 ' . If this macro is not defined , the
` floatx80 ' type will not be defined , and none of the functions that either
input or output the ` floatx80 ' type will be defined .
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*/
#ifdef CONFIG_FPE_NWFPE_XP
#define FLOATX80
#endif
/*
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Software IEC / IEEE floating - point types .
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
*/
typedef u32 float32;
typedef u64 float64;
typedef struct {
#ifdef __ARMEB__
u16 __padding;
u16 high;
#else
u16 high;
u16 __padding;
#endif
u64 low;
} __attribute__ ((packed,aligned(4 ))) floatx80;
/*
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Software IEC / IEEE floating - point underflow tininess - detection mode .
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
*/
extern signed char float_detect_tininess;
enum {
float_tininess_after_rounding = 0 ,
float_tininess_before_rounding = 1
};
/*
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Software IEC / IEEE floating - point rounding mode .
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
*/
//extern int8 float_rounding_mode;
enum {
float_round_nearest_even = 0 ,
float_round_to_zero = 1 ,
float_round_down = 2 ,
float_round_up = 3
};
/*
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Software IEC / IEEE floating - point exception flags .
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enum {
float_flag_inexact = 1 ,
float_flag_underflow = 2 ,
float_flag_overflow = 4 ,
float_flag_divbyzero = 8 ,
float_flag_invalid = 16
} ;
ScottB : November 4 , 1998
Changed the enumeration to match the bit order in the FPA11 .
*/
enum {
float_flag_invalid = 1 ,
float_flag_divbyzero = 2 ,
float_flag_overflow = 4 ,
float_flag_underflow = 8 ,
float_flag_inexact = 16
};
/*
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Routine to raise any or all of the software IEC / IEEE floating - point
exception flags .
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*/
void float_raise( signed char );
/*
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Software IEC / IEEE integer - to - floating - point conversion routines .
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*/
float32 int32_to_float32( struct roundingData *, signed int );
float64 int32_to_float64( signed int );
#ifdef FLOATX80
floatx80 int32_to_floatx80( signed int );
#endif
/*
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Software IEC / IEEE single - precision conversion routines .
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*/
signed int float32_to_int32( struct roundingData *, float32 );
signed int float32_to_int32_round_to_zero( float32 );
float64 float32_to_float64( float32 );
#ifdef FLOATX80
floatx80 float32_to_floatx80( float32 );
#endif
/*
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Software IEC / IEEE single - precision operations .
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*/
float32 float32_round_to_int( struct roundingData*, float32 );
float32 float32_add( struct roundingData *, float32, float32 );
float32 float32_sub( struct roundingData *, float32, float32 );
float32 float32_mul( struct roundingData *, float32, float32 );
float32 float32_div( struct roundingData *, float32, float32 );
float32 float32_rem( struct roundingData *, float32, float32 );
float32 float32_sqrt( struct roundingData*, float32 );
char float32_eq( float32, float32 );
char float32_le( float32, float32 );
char float32_lt( float32, float32 );
char float32_eq_signaling( float32, float32 );
char float32_le_quiet( float32, float32 );
char float32_lt_quiet( float32, float32 );
char float32_is_signaling_nan( float32 );
/*
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Software IEC / IEEE double - precision conversion routines .
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*/
signed int float64_to_int32( struct roundingData *, float64 );
signed int float64_to_int32_round_to_zero( float64 );
float32 float64_to_float32( struct roundingData *, float64 );
#ifdef FLOATX80
floatx80 float64_to_floatx80( float64 );
#endif
/*
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Software IEC / IEEE double - precision operations .
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
*/
float64 float64_round_to_int( struct roundingData *, float64 );
float64 float64_add( struct roundingData *, float64, float64 );
float64 float64_sub( struct roundingData *, float64, float64 );
float64 float64_mul( struct roundingData *, float64, float64 );
float64 float64_div( struct roundingData *, float64, float64 );
float64 float64_rem( struct roundingData *, float64, float64 );
float64 float64_sqrt( struct roundingData *, float64 );
char float64_eq( float64, float64 );
char float64_le( float64, float64 );
char float64_lt( float64, float64 );
char float64_eq_signaling( float64, float64 );
char float64_le_quiet( float64, float64 );
char float64_lt_quiet( float64, float64 );
char float64_is_signaling_nan( float64 );
#ifdef FLOATX80
/*
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Software IEC / IEEE extended double - precision conversion routines .
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
*/
signed int floatx80_to_int32( struct roundingData *, floatx80 );
signed int floatx80_to_int32_round_to_zero( floatx80 );
float32 floatx80_to_float32( struct roundingData *, floatx80 );
float64 floatx80_to_float64( struct roundingData *, floatx80 );
/*
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Software IEC / IEEE extended double - precision operations .
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
*/
floatx80 floatx80_round_to_int( struct roundingData *, floatx80 );
floatx80 floatx80_add( struct roundingData *, floatx80, floatx80 );
floatx80 floatx80_sub( struct roundingData *, floatx80, floatx80 );
floatx80 floatx80_mul( struct roundingData *, floatx80, floatx80 );
floatx80 floatx80_div( struct roundingData *, floatx80, floatx80 );
floatx80 floatx80_rem( struct roundingData *, floatx80, floatx80 );
floatx80 floatx80_sqrt( struct roundingData *, floatx80 );
char floatx80_eq( floatx80, floatx80 );
char floatx80_le( floatx80, floatx80 );
char floatx80_lt( floatx80, floatx80 );
char floatx80_eq_signaling( floatx80, floatx80 );
char floatx80_le_quiet( floatx80, floatx80 );
char floatx80_lt_quiet( floatx80, floatx80 );
char floatx80_is_signaling_nan( floatx80 );
extern flag floatx80_is_nan(floatx80);
#endif
static inline flag extractFloat32Sign(float32 a)
{
return a >> 31 ;
}
static inline flag float32_eq_nocheck(float32 a, float32 b)
{
return (a == b) || ((bits32) ((a | b) << 1 ) == 0 );
}
static inline flag float32_lt_nocheck(float32 a, float32 b)
{
flag aSign, bSign;
aSign = extractFloat32Sign(a);
bSign = extractFloat32Sign(b);
if (aSign != bSign)
return aSign && ((bits32) ((a | b) << 1 ) != 0 );
return (a != b) && (aSign ^ (a < b));
}
static inline flag extractFloat64Sign(float64 a)
{
return a >> 63 ;
}
static inline flag float64_eq_nocheck(float64 a, float64 b)
{
return (a == b) || ((bits64) ((a | b) << 1 ) == 0 );
}
static inline flag float64_lt_nocheck(float64 a, float64 b)
{
flag aSign, bSign;
aSign = extractFloat64Sign(a);
bSign = extractFloat64Sign(b);
if (aSign != bSign)
return aSign && ((bits64) ((a | b) << 1 ) != 0 );
return (a != b) && (aSign ^ (a < b));
}
extern flag float32_is_nan( float32 a );
extern flag float64_is_nan( float64 a );
extern int32 float64_to_uint32( struct roundingData *roundData, float64 a );
extern int32 float64_to_uint32_round_to_zero( float64 a );
#endif
Messung V0.5 in Prozent C=95 H=96 G=95
¤ Dauer der Verarbeitung: 0.14 Sekunden
(vorverarbeitet am 2026-09-28)
¤
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