f128_to_ui32_r_minMag.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
uint_fast32_t	f128_to_ui32_r_minMag (float128_t a, bool exact)

Function Documentation

f128_to_ui32_r_minMag()

uint_fast32_t f128_to_ui32_r_minMag	(	float128_t	a,
		bool	exact )

Definition at line 44 of file f128_to_ui32_r_minMag.c.

{
    union ui128_f128 uA;
    uint_fast64_t uiA64, uiA0;
    int_fast32_t exp;
    uint_fast64_t sig64;
    int_fast32_t shiftDist;
    bool sign;
    uint_fast32_t z;
 
    /*------------------------------------------------------------------------
    *------------------------------------------------------------------------*/
    uA.f = a;
    uiA64 = uA.ui.v64;
    uiA0  = uA.ui.v0;
    exp   = expF128UI64( uiA64 );
    sig64 = fracF128UI64( uiA64 ) | (uiA0 != 0);
    /*------------------------------------------------------------------------
    *------------------------------------------------------------------------*/
    shiftDist = 0x402F - exp;
    if ( 49 <= shiftDist ) {
        if ( exact && (exp | sig64) ) {
            softfloat_exceptionFlags |= softfloat_flag_inexact;
        }
        return 0;
    }
    /*------------------------------------------------------------------------
    *------------------------------------------------------------------------*/
    sign = signF128UI64( uiA64 );
    if ( sign || (shiftDist < 17) ) {
        softfloat_raiseFlags( softfloat_flag_invalid );
        return
            (exp == 0x7FFF) && sig64 ? ui32_fromNaN
                : sign ? ui32_fromNegOverflow : ui32_fromPosOverflow;
    }
    /*------------------------------------------------------------------------
    *------------------------------------------------------------------------*/
    sig64 |= UINT64_C( 0x0001000000000000 );
    z = sig64>>shiftDist;
    if ( exact && ((uint_fast64_t) z<<shiftDist != sig64) ) {
        softfloat_exceptionFlags |= softfloat_flag_inexact;
    }
    return z;
 
}

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