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/* Native implementation of soft float functions . Only a single status
context is supported */
# include "softfloat.h"
# include < math . h >
void set_float_rounding_mode ( int val STATUS_PARAM )
{
STATUS ( float_rounding_mode ) = val ;
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# if defined ( _BSD ) && ! defined ( __APPLE__ ) || ( defined ( HOST_SOLARIS ) && HOST_SOLARIS < 10 )
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fpsetround ( val );
# elif defined ( __arm__ )
/* nothing to do */
# else
fesetround ( val );
# endif
}
# ifdef FLOATX80
void set_floatx80_rounding_precision ( int val STATUS_PARAM )
{
STATUS ( floatx80_rounding_precision ) = val ;
}
# endif
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# if defined ( _BSD ) || ( defined ( HOST_SOLARIS ) && HOST_SOLARIS < 10 )
# define lrint ( d ) (( int32_t ) rint ( d ))
# define llrint ( d ) (( int64_t ) rint ( d ))
# define lrintf ( f ) (( int32_t ) rint ( f ))
# define llrintf ( f ) (( int64_t ) rint ( f ))
# define sqrtf ( f ) (( float ) sqrt ( f ))
# define remainderf ( fa , fb ) (( float ) remainder ( fa , fb ))
# define rintf ( f ) (( float ) rint ( f ))
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# if ! defined ( __sparc__ ) && defined ( HOST_SOLARIS ) && HOST_SOLARIS < 10
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extern long double rintl ( long double );
extern long double scalbnl ( long double , int );
long long
llrintl ( long double x ) {
return (( long long ) rintl ( x ));
}
long
lrintl ( long double x ) {
return (( long ) rintl ( x ));
}
long double
ldexpl ( long double x , int n ) {
return ( scalbnl ( x , n ));
}
# endif
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# endif
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# if defined ( _ARCH_PPC )
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/* correct (but slow) PowerPC rint() (glibc version is incorrect) */
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static double qemu_rint ( double x )
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{
double y = 4503599627370496 . 0 ;
if ( fabs ( x ) >= y )
return x ;
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if ( x < 0 )
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y = - y ;
y = ( x + y ) - y ;
if ( y == 0 . 0 )
y = copysign ( y , x );
return y ;
}
# define rint qemu_rint
# endif
/*----------------------------------------------------------------------------
| Software IEC / IEEE integer - to - floating - point conversion routines .
*---------------------------------------------------------------------------- */
float32 int32_to_float32 ( int v STATUS_PARAM )
{
return ( float32 ) v ;
}
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float32 uint32_to_float32 ( unsigned int v STATUS_PARAM )
{
return ( float32 ) v ;
}
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float64 int32_to_float64 ( int v STATUS_PARAM )
{
return ( float64 ) v ;
}
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float64 uint32_to_float64 ( unsigned int v STATUS_PARAM )
{
return ( float64 ) v ;
}
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# ifdef FLOATX80
floatx80 int32_to_floatx80 ( int v STATUS_PARAM )
{
return ( floatx80 ) v ;
}
# endif
float32 int64_to_float32 ( int64_t v STATUS_PARAM )
{
return ( float32 ) v ;
}
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float32 uint64_to_float32 ( uint64_t v STATUS_PARAM )
{
return ( float32 ) v ;
}
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float64 int64_to_float64 ( int64_t v STATUS_PARAM )
{
return ( float64 ) v ;
}
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float64 uint64_to_float64 ( uint64_t v STATUS_PARAM )
{
return ( float64 ) v ;
}
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# ifdef FLOATX80
floatx80 int64_to_floatx80 ( int64_t v STATUS_PARAM )
{
return ( floatx80 ) v ;
}
# endif
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/* XXX: this code implements the x86 behaviour, not the IEEE one. */
# if HOST_LONG_BITS == 32
static inline int long_to_int32 ( long a )
{
return a ;
}
# else
static inline int long_to_int32 ( long a )
{
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if ( a != ( int32_t ) a )
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a = 0x80000000 ;
return a ;
}
# endif
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/*----------------------------------------------------------------------------
| Software IEC / IEEE single - precision conversion routines .
*---------------------------------------------------------------------------- */
int float32_to_int32 ( float32 a STATUS_PARAM )
{
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return long_to_int32 ( lrintf ( a ));
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}
int float32_to_int32_round_to_zero ( float32 a STATUS_PARAM )
{
return ( int ) a ;
}
int64_t float32_to_int64 ( float32 a STATUS_PARAM )
{
return llrintf ( a );
}
int64_t float32_to_int64_round_to_zero ( float32 a STATUS_PARAM )
{
return ( int64_t ) a ;
}
float64 float32_to_float64 ( float32 a STATUS_PARAM )
{
return a ;
}
# ifdef FLOATX80
floatx80 float32_to_floatx80 ( float32 a STATUS_PARAM )
{
return a ;
}
# endif
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unsigned int float32_to_uint32 ( float32 a STATUS_PARAM )
{
int64_t v ;
unsigned int res ;
v = llrintf ( a );
if ( v < 0 ) {
res = 0 ;
} else if ( v > 0xffffffff ) {
res = 0xffffffff ;
} else {
res = v ;
}
return res ;
}
unsigned int float32_to_uint32_round_to_zero ( float32 a STATUS_PARAM )
{
int64_t v ;
unsigned int res ;
v = ( int64_t ) a ;
if ( v < 0 ) {
res = 0 ;
} else if ( v > 0xffffffff ) {
res = 0xffffffff ;
} else {
res = v ;
}
return res ;
}
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/*----------------------------------------------------------------------------
| Software IEC / IEEE single - precision operations .
*---------------------------------------------------------------------------- */
float32 float32_round_to_int ( float32 a STATUS_PARAM )
{
return rintf ( a );
}
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float32 float32_rem ( float32 a , float32 b STATUS_PARAM )
{
return remainderf ( a , b );
}
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float32 float32_sqrt ( float32 a STATUS_PARAM )
{
return sqrtf ( a );
}
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int float32_compare ( float32 a , float32 b STATUS_PARAM )
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{
if ( a < b ) {
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return float_relation_less ;
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} else if ( a == b ) {
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return float_relation_equal ;
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} else if ( a > b ) {
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return float_relation_greater ;
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} else {
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return float_relation_unordered ;
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}
}
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int float32_compare_quiet ( float32 a , float32 b STATUS_PARAM )
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{
if ( isless ( a , b )) {
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return float_relation_less ;
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} else if ( a == b ) {
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return float_relation_equal ;
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} else if ( isgreater ( a , b )) {
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return float_relation_greater ;
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} else {
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return float_relation_unordered ;
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}
}
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int float32_is_signaling_nan ( float32 a1 )
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{
float32u u ;
uint32_t a ;
u . f = a1 ;
a = u . i ;
return ( ( ( a >> 22 ) & 0x1FF ) == 0x1FE ) && ( a & 0x003FFFFF );
}
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int float32_is_nan ( float32 a1 )
{
float32u u ;
uint64_t a ;
u . f = a1 ;
a = u . i ;
return ( 0xFF800000 < ( a << 1 ) );
}
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/*----------------------------------------------------------------------------
| Software IEC / IEEE double - precision conversion routines .
*---------------------------------------------------------------------------- */
int float64_to_int32 ( float64 a STATUS_PARAM )
{
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return long_to_int32 ( lrint ( a ));
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}
int float64_to_int32_round_to_zero ( float64 a STATUS_PARAM )
{
return ( int ) a ;
}
int64_t float64_to_int64 ( float64 a STATUS_PARAM )
{
return llrint ( a );
}
int64_t float64_to_int64_round_to_zero ( float64 a STATUS_PARAM )
{
return ( int64_t ) a ;
}
float32 float64_to_float32 ( float64 a STATUS_PARAM )
{
return a ;
}
# ifdef FLOATX80
floatx80 float64_to_floatx80 ( float64 a STATUS_PARAM )
{
return a ;
}
# endif
# ifdef FLOAT128
float128 float64_to_float128 ( float64 a STATUS_PARAM )
{
return a ;
}
# endif
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unsigned int float64_to_uint32 ( float64 a STATUS_PARAM )
{
int64_t v ;
unsigned int res ;
v = llrint ( a );
if ( v < 0 ) {
res = 0 ;
} else if ( v > 0xffffffff ) {
res = 0xffffffff ;
} else {
res = v ;
}
return res ;
}
unsigned int float64_to_uint32_round_to_zero ( float64 a STATUS_PARAM )
{
int64_t v ;
unsigned int res ;
v = ( int64_t ) a ;
if ( v < 0 ) {
res = 0 ;
} else if ( v > 0xffffffff ) {
res = 0xffffffff ;
} else {
res = v ;
}
return res ;
}
uint64_t float64_to_uint64 ( float64 a STATUS_PARAM )
{
int64_t v ;
v = llrint ( a + ( float64 ) INT64_MIN );
return v - INT64_MIN ;
}
uint64_t float64_to_uint64_round_to_zero ( float64 a STATUS_PARAM )
{
int64_t v ;
v = ( int64_t )( a + ( float64 ) INT64_MIN );
return v - INT64_MIN ;
}
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/*----------------------------------------------------------------------------
| Software IEC / IEEE double - precision operations .
*---------------------------------------------------------------------------- */
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# if defined ( __sun__ ) && defined ( HOST_SOLARIS ) && HOST_SOLARIS < 10
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static inline float64 trunc ( float64 x )
{
return x < 0 ? - floor ( - x ) : floor ( x );
}
# endif
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float64 float64_trunc_to_int ( float64 a STATUS_PARAM )
{
return trunc ( a );
}
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float64 float64_round_to_int ( float64 a STATUS_PARAM )
{
# if defined ( __arm__ )
switch ( STATUS ( float_rounding_mode )) {
default :
case float_round_nearest_even :
asm ( "rndd %0, %1" : "=f" ( a ) : "f" ( a ));
break ;
case float_round_down :
asm ( "rnddm %0, %1" : "=f" ( a ) : "f" ( a ));
break ;
case float_round_up :
asm ( "rnddp %0, %1" : "=f" ( a ) : "f" ( a ));
break ;
case float_round_to_zero :
asm ( "rnddz %0, %1" : "=f" ( a ) : "f" ( a ));
break ;
}
# else
return rint ( a );
# endif
}
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float64 float64_rem ( float64 a , float64 b STATUS_PARAM )
{
return remainder ( a , b );
}
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float64 float64_sqrt ( float64 a STATUS_PARAM )
{
return sqrt ( a );
}
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int float64_compare ( float64 a , float64 b STATUS_PARAM )
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{
if ( a < b ) {
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return float_relation_less ;
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} else if ( a == b ) {
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return float_relation_equal ;
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} else if ( a > b ) {
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return float_relation_greater ;
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} else {
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return float_relation_unordered ;
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}
}
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int float64_compare_quiet ( float64 a , float64 b STATUS_PARAM )
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{
if ( isless ( a , b )) {
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return float_relation_less ;
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} else if ( a == b ) {
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return float_relation_equal ;
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} else if ( isgreater ( a , b )) {
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return float_relation_greater ;
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} else {
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return float_relation_unordered ;
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}
}
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int float64_is_signaling_nan ( float64 a1 )
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{
float64u u ;
uint64_t a ;
u . f = a1 ;
a = u . i ;
return
( ( ( a >> 51 ) & 0xFFF ) == 0xFFE )
&& ( a & LIT64 ( 0x0007FFFFFFFFFFFF ) );
}
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int float64_is_nan ( float64 a1 )
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{
float64u u ;
uint64_t a ;
u . f = a1 ;
a = u . i ;
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return ( LIT64 ( 0xFFF0000000000000 ) < ( bits64 ) ( a << 1 ) );
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}
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# ifdef FLOATX80
/*----------------------------------------------------------------------------
| Software IEC / IEEE extended double - precision conversion routines .
*---------------------------------------------------------------------------- */
int floatx80_to_int32 ( floatx80 a STATUS_PARAM )
{
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return long_to_int32 ( lrintl ( a ));
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}
int floatx80_to_int32_round_to_zero ( floatx80 a STATUS_PARAM )
{
return ( int ) a ;
}
int64_t floatx80_to_int64 ( floatx80 a STATUS_PARAM )
{
return llrintl ( a );
}
int64_t floatx80_to_int64_round_to_zero ( floatx80 a STATUS_PARAM )
{
return ( int64_t ) a ;
}
float32 floatx80_to_float32 ( floatx80 a STATUS_PARAM )
{
return a ;
}
float64 floatx80_to_float64 ( floatx80 a STATUS_PARAM )
{
return a ;
}
/*----------------------------------------------------------------------------
| Software IEC / IEEE extended double - precision operations .
*---------------------------------------------------------------------------- */
floatx80 floatx80_round_to_int ( floatx80 a STATUS_PARAM )
{
return rintl ( a );
}
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floatx80 floatx80_rem ( floatx80 a , floatx80 b STATUS_PARAM )
{
return remainderl ( a , b );
}
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floatx80 floatx80_sqrt ( floatx80 a STATUS_PARAM )
{
return sqrtl ( a );
}
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int floatx80_compare ( floatx80 a , floatx80 b STATUS_PARAM )
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{
if ( a < b ) {
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return float_relation_less ;
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} else if ( a == b ) {
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return float_relation_equal ;
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} else if ( a > b ) {
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return float_relation_greater ;
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} else {
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return float_relation_unordered ;
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}
}
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int floatx80_compare_quiet ( floatx80 a , floatx80 b STATUS_PARAM )
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{
if ( isless ( a , b )) {
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return float_relation_less ;
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} else if ( a == b ) {
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return float_relation_equal ;
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} else if ( isgreater ( a , b )) {
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return float_relation_greater ;
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} else {
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return float_relation_unordered ;
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}
}
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int floatx80_is_signaling_nan ( floatx80 a1 )
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{
floatx80u u ;
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uint64_t aLow ;
u . f = a1 ;
aLow = u . i . low & ~ LIT64 ( 0x4000000000000000 );
return
( ( u . i . high & 0x7FFF ) == 0x7FFF )
&& ( bits64 ) ( aLow << 1 )
&& ( u . i . low == aLow );
}
int floatx80_is_nan ( floatx80 a1 )
{
floatx80u u ;
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u . f = a1 ;
return ( ( u . i . high & 0x7FFF ) == 0x7FFF ) && ( bits64 ) ( u . i . low << 1 );
}
# endif