extF80_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 extF80_to_i64.c:

Go to the source code of this file.

Functions
int_fast64_t	extF80_to_i64 (extFloat80_t a, uint_fast8_t roundingMode, bool exact)

Function Documentation

extF80_to_i64()

int_fast64_t extF80_to_i64	(	extFloat80_t	a,
		uint_fast8_t	roundingMode,
		bool	exact )

Definition at line 45 of file extF80_to_i64.c.

{
    union { struct extFloat80M s; extFloat80_t f; } uA;
    uint_fast16_t uiA64;
    bool sign;
    int_fast32_t exp;
    uint_fast64_t sig;
    int_fast32_t shiftDist;
    uint_fast64_t sigExtra;
    struct uint64_extra sig64Extra;
 
    /*------------------------------------------------------------------------
    *------------------------------------------------------------------------*/
    uA.f = a;
    uiA64 = uA.s.signExp;
    sign = signExtF80UI64( uiA64 );
    exp  = expExtF80UI64( uiA64 );
    sig = uA.s.signif;
    /*------------------------------------------------------------------------
    *------------------------------------------------------------------------*/
    shiftDist = 0x403E - exp;
    if ( shiftDist <= 0 ) {
        /*--------------------------------------------------------------------
        *--------------------------------------------------------------------*/
        if ( shiftDist ) {
            softfloat_raiseFlags( softfloat_flag_invalid );
            return
                (exp == 0x7FFF) && (sig & UINT64_C( 0x7FFFFFFFFFFFFFFF ))
                    ? i64_fromNaN
                    : sign ? i64_fromNegOverflow : i64_fromPosOverflow;
        }
        /*--------------------------------------------------------------------
        *--------------------------------------------------------------------*/
        sigExtra = 0;
    } else {
        /*--------------------------------------------------------------------
        *--------------------------------------------------------------------*/
        sig64Extra = softfloat_shiftRightJam64Extra( sig, 0, shiftDist );
        sig = sig64Extra.v;
        sigExtra = sig64Extra.extra;
    }
    return softfloat_roundToI64( sign, sig, sigExtra, roundingMode, exact );
 
}

Here is the call graph for this function: