extF80M_to_i64.c File Reference

#include <stdbool.h>
#include <stdint.h>
#include "platform.h"
#include "internals.h"
#include "specialize.h"
#include "softfloat.h"

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Functions
int_fast64_t	extF80M_to_i64 (const extFloat80_t *aPtr, uint_fast8_t roundingMode, bool exact)

Function Documentation

extF80M_to_i64()

int_fast64_t extF80M_to_i64	(	const extFloat80_t *	aPtr,
		uint_fast8_t	roundingMode,
		bool	exact )

Definition at line 58 of file extF80M_to_i64.c.

{
    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_roundMToI64( sign, extSig, roundingMode, exact );
 
}

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