f128M_to_i64.c File Reference

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

Include dependency graph for f128M_to_i64.c:

Go to the source code of this file.

Functions
int_fast64_t	f128M_to_i64 (const float128_t *aPtr, uint_fast8_t roundingMode, bool exact)

Function Documentation

f128M_to_i64()

int_fast64_t f128M_to_i64	(	const float128_t *	aPtr,
		uint_fast8_t	roundingMode,
		bool	exact )

Definition at line 57 of file f128M_to_i64.c.

{
    const uint32_t *aWPtr;
    uint32_t uiA96;
    bool sign;
    int32_t exp;
    uint32_t sig96;
    int32_t shiftDist;
    uint32_t sig[4];
 
    /*------------------------------------------------------------------------
    *------------------------------------------------------------------------*/
    aWPtr = (const uint32_t *) aPtr;
    uiA96 = aWPtr[indexWordHi( 4 )];
    sign  = signF128UI96( uiA96 );
    exp   = expF128UI96( uiA96 );
    sig96 = fracF128UI96( uiA96 );
    /*------------------------------------------------------------------------
    *------------------------------------------------------------------------*/
    shiftDist = 0x404F - exp;
    if ( shiftDist < 17 ) {
        softfloat_raiseFlags( softfloat_flag_invalid );
        return
            (exp == 0x7FFF)
                && (sig96
                        || (aWPtr[indexWord( 4, 2 )] | aWPtr[indexWord( 4, 1 )]
                                | aWPtr[indexWord( 4, 0 )]))
                ? i64_fromNaN
                : sign ? i64_fromNegOverflow : i64_fromPosOverflow;
    }
    /*------------------------------------------------------------------------
    *------------------------------------------------------------------------*/
    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, shiftDist, sig );
    return
        softfloat_roundMToI64(
            sign, sig + indexMultiwordLo( 4, 3 ), roundingMode, exact );
 
}

Here is the call graph for this function: