extF80_to_f128.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
float128_t	extF80_to_f128 (extFloat80_t a)

Function Documentation

extF80_to_f128()

float128_t extF80_to_f128

(

extFloat80_t

a

)

Definition at line 44 of file extF80_to_f128.c.

{
    union { struct extFloat80M s; extFloat80_t f; } uA;
    uint_fast16_t uiA64;
    uint_fast64_t uiA0;
    uint_fast16_t exp;
    uint_fast64_t frac;
    struct commonNaN commonNaN;
    struct uint128 uiZ;
    bool sign;
    struct uint128 frac128;
    union ui128_f128 uZ;
 
    uA.f = a;
    uiA64 = uA.s.signExp;
    uiA0  = uA.s.signif;
    exp = expExtF80UI64( uiA64 );
    frac = uiA0 & UINT64_C( 0x7FFFFFFFFFFFFFFF );
    if ( (exp == 0x7FFF) && frac ) {
        softfloat_extF80UIToCommonNaN( uiA64, uiA0, &commonNaN );
        uiZ = softfloat_commonNaNToF128UI( &commonNaN );
    } else {
        sign = signExtF80UI64( uiA64 );
        frac128 = softfloat_shortShiftLeft128( 0, frac, 49 );
        uiZ.v64 = packToF128UI64( sign, exp, frac128.v64 );
        uiZ.v0  = frac128.v0;
    }
    uZ.ui = uiZ;
    return uZ.f;
 
}

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