int_fast64_t
f128M_to_i64( const float128_t *aPtr, uint_fast8_t roundingMode, bool exact )
{
const uint32_t *aWPtr;
uint32_t uiA96;
int32_t exp;
bool sign;
uint32_t sig96;
int32_t shiftCount;
uint32_t sig[4];
aWPtr = (const uint32_t *) aPtr;
uiA96 = aWPtr[indexWordHi( 4 )];
exp = expF128UI96( uiA96 );
sign = signF128UI96( uiA96 );
sig96 = fracF128UI96( uiA96 );
shiftCount = 0x404F - exp;
if ( shiftCount < 17 ) {
softfloat_raiseFlags( softfloat_flag_invalid );
return
! sign
|| ((exp == 0x7FFF)
&& (sig96
|| ( aWPtr[indexWord( 4, 2 )]
| aWPtr[indexWord( 4, 1 )]
| aWPtr[indexWord( 4, 0 )]
)))
? INT64_C( 0x7FFFFFFFFFFFFFFF )
: -INT64_C( 0x7FFFFFFFFFFFFFFF ) - 1;
}
if ( exp ) sig96 |= 0x00010000;
sig[indexWord( 4, 3 )] = sig96;
sig[indexWord( 4, 2 )] = aWPtr[indexWord( 4, 2 )];
sig[indexWord( 4, 1 )] = aWPtr[indexWord( 4, 1 )];
sig[indexWord( 4, 0 )] = aWPtr[indexWord( 4, 0 )];
softfloat_shiftRightJam128M( sig, shiftCount, sig );
return
softfloat_roundPackMToI64(
sign, sig + indexMultiwordLo( 4, 3 ), roundingMode, exact );
}
int_fast64_t
extF80M_to_i64(
const extFloat80_t *aPtr, uint_fast8_t roundingMode, bool exact )
{
const struct extFloat80M *aSPtr;
uint_fast16_t uiA64;
bool sign;
int32_t exp;
uint64_t sig;
int32_t shiftDist;
uint32_t extSig[3];
/*------------------------------------------------------------------------
*------------------------------------------------------------------------*/
aSPtr = (const struct extFloat80M *) aPtr;
uiA64 = aSPtr->signExp;
sign = signExtF80UI64( uiA64 );
exp = expExtF80UI64( uiA64 );
sig = aSPtr->signif;
/*------------------------------------------------------------------------
*------------------------------------------------------------------------*/
shiftDist = 0x403E - exp;
if ( shiftDist < 0 ) {
softfloat_raiseFlags( softfloat_flag_invalid );
return
(exp == 0x7FFF) && (sig & UINT64_C( 0x7FFFFFFFFFFFFFFF ))
? i64_fromNaN
: sign ? i64_fromNegOverflow : i64_fromPosOverflow;
}
/*------------------------------------------------------------------------
*------------------------------------------------------------------------*/
extSig[indexWord( 3, 2 )] = sig>>32;
extSig[indexWord( 3, 1 )] = sig;
extSig[indexWord( 3, 0 )] = 0;
if ( shiftDist ) softfloat_shiftRightJam96M( extSig, shiftDist, extSig );
return softfloat_roundPackMToI64( sign, extSig, roundingMode, exact );
}