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#include <stdbool.h>
#include <stdint.h>
#include "platform.h"
#include "internals.h"
#include "softfloat.h"
int_fast64_t f64_to_i64_r_minMag( float64_t a, bool exact )
{
union ui64_f64 uA;
uint_fast64_t uiA;
bool sign;
int_fast16_t exp;
uint_fast64_t sig;
int_fast16_t shiftCount;
int_fast64_t absZ;
uA.f = a;
uiA = uA.ui;
sign = signF64UI( uiA );
exp = expF64UI( uiA );
sig = fracF64UI( uiA );
shiftCount = exp - 0x433;
if ( 0 <= shiftCount ) {
if ( 0x43E <= exp ) {
if ( uiA != packToF64UI( 1, 0x43E, 0 ) ) {
softfloat_raiseFlags( softfloat_flag_invalid );
if ( ! sign || ( ( exp == 0x7FF ) && sig ) ) {
return INT64_C( 0x7FFFFFFFFFFFFFFF );
}
}
return - INT64_C( 0x7FFFFFFFFFFFFFFF ) - 1;
}
sig |= UINT64_C( 0x0010000000000000 );
absZ = sig<<shiftCount;
} else {
if ( exp < 0x3FF ) {
if ( exact && ( exp | sig ) ) {
softfloat_raiseFlags( softfloat_flag_inexact );
}
return 0;
}
sig |= UINT64_C( 0x0010000000000000 );
absZ = sig>>( - shiftCount );
if ( exact && (uint64_t) ( sig<<( shiftCount & 63 ) ) ) {
softfloat_raiseFlags( softfloat_flag_inexact );
}
}
return sign ? - absZ : absZ;
}
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