s_normRoundPackToF128.c File Reference

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

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Functions
float128_t	softfloat_normRoundPackToF128 (bool sign, int_fast32_t exp, uint_fast64_t sig64, uint_fast64_t sig0)

Function Documentation

softfloat_normRoundPackToF128()

float128_t softfloat_normRoundPackToF128	(	bool	sign,
		int_fast32_t	exp,
		uint_fast64_t	sig64,
		uint_fast64_t	sig0 )

Definition at line 43 of file s_normRoundPackToF128.c.

{
    int_fast8_t shiftDist;
    struct uint128 sig128;
    union ui128_f128 uZ;
    uint_fast64_t sigExtra;
    struct uint128_extra sig128Extra;
 
    if ( ! sig64 ) {
        exp -= 64;
        sig64 = sig0;
        sig0 = 0;
    }
    shiftDist = softfloat_countLeadingZeros64( sig64 ) - 15;
    exp -= shiftDist;
    if ( 0 <= shiftDist ) {
        if ( shiftDist ) {
            sig128 = softfloat_shortShiftLeft128( sig64, sig0, shiftDist );
            sig64 = sig128.v64;
            sig0  = sig128.v0;
        }
        if ( (uint32_t) exp < 0x7FFD ) {
            uZ.ui.v64 = packToF128UI64( sign, sig64 | sig0 ? exp : 0, sig64 );
            uZ.ui.v0  = sig0;
            return uZ.f;
        }
        sigExtra = 0;
    } else {
        sig128Extra =
            softfloat_shortShiftRightJam128Extra( sig64, sig0, 0, -shiftDist );
        sig64 = sig128Extra.v.v64;
        sig0  = sig128Extra.v.v0;
        sigExtra = sig128Extra.extra;
    }
    return softfloat_roundPackToF128( sign, exp, sig64, sig0, sigExtra );
 
}

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