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#include <stdbool.h>
#include <stdint.h>
#include "platform.h"
#include "internals.h"
#include "softfloat.h"
int_fast32_t
softfloat_roundPackToI32(
bool sign, uint_fast64_t sig, int_fast8_t roundingMode, bool exact )
{
bool roundNearestEven;
int roundIncrement, roundBits;
uint_fast32_t sig32;
union { uint32_t ui; int32_t i; } uZ;
int_fast32_t z;
roundNearestEven = ( roundingMode == softfloat_round_nearest_even );
roundIncrement = 0x40;
if (
! roundNearestEven
&& ( roundingMode != softfloat_round_nearest_maxMag )
) {
roundIncrement =
( roundingMode == softfloat_round_minMag )
|| ( roundingMode
== ( sign ? softfloat_round_max : softfloat_round_min ) )
? 0
: 0x7F;
}
roundBits = sig & 0x7F;
sig += roundIncrement;
if ( sig & UINT64_C( 0xFFFFFF8000000000 ) ) goto invalid;
sig32 = sig>>7;
sig32 &= ~ ( ! ( roundBits ^ 0x40 ) & roundNearestEven );
uZ.ui = sign ? - sig32 : sig32;
z = uZ.i;
if ( z && ( ( z < 0 ) ^ sign ) ) goto invalid;
if ( exact && roundBits ) {
softfloat_raiseFlags( softfloat_flag_inexact );
}
return z;
invalid:
softfloat_raiseFlags( softfloat_flag_invalid );
return sign ? -0x7FFFFFFF - 1 : 0x7FFFFFFF;
}
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