f32_to_extF80M.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
void	f32_to_extF80M (float32_t a, extFloat80_t *zPtr)

Function Documentation

f32_to_extF80M()

void f32_to_extF80M	(	float32_t	a,
		extFloat80_t *	zPtr )

Definition at line 55 of file f32_to_extF80M.c.

{
    struct extFloat80M *zSPtr;
    union ui32_f32 uA;
    uint32_t uiA;
    bool sign;
    int_fast16_t exp;
    uint32_t frac;
    struct commonNaN commonNaN;
    uint_fast16_t uiZ64;
    uint32_t uiZ32;
    struct exp16_sig32 normExpSig;
 
    /*------------------------------------------------------------------------
    *------------------------------------------------------------------------*/
    zSPtr = (struct extFloat80M *) zPtr;
    uA.f = a;
    uiA = uA.ui;
    sign = signF32UI( uiA );
    exp  = expF32UI( uiA );
    frac = fracF32UI( uiA );
    /*------------------------------------------------------------------------
    *------------------------------------------------------------------------*/
    if ( exp == 0xFF ) {
        if ( frac ) {
            softfloat_f32UIToCommonNaN( uiA, &commonNaN );
            softfloat_commonNaNToExtF80M( &commonNaN, zSPtr );
            return;
        }
        uiZ64 = packToExtF80UI64( sign, 0x7FFF );
        uiZ32 = 0x80000000;
        goto uiZ;
    }
    /*------------------------------------------------------------------------
    *------------------------------------------------------------------------*/
    if ( ! exp ) {
        if ( ! frac ) {
            uiZ64 = packToExtF80UI64( sign, 0 );
            uiZ32 = 0;
            goto uiZ;
        }
        normExpSig = softfloat_normSubnormalF32Sig( frac );
        exp = normExpSig.exp;
        frac = normExpSig.sig;
    }
    /*------------------------------------------------------------------------
    *------------------------------------------------------------------------*/
    uiZ64 = packToExtF80UI64( sign, exp + 0x3F80 );
    uiZ32 = 0x80000000 | (uint32_t) frac<<8;
 uiZ:
    zSPtr->signExp = uiZ64;
    zSPtr->signif = (uint64_t) uiZ32<<32;
 
}

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