s_shiftNormSigF128M.c File Reference

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

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Functions
int	softfloat_shiftNormSigF128M (const uint32_t *wPtr, uint_fast8_t shiftDist, uint32_t *sigPtr)

Function Documentation

softfloat_shiftNormSigF128M()

int softfloat_shiftNormSigF128M	(	const uint32_t *	wPtr,
		uint_fast8_t	shiftDist,
		uint32_t *	sigPtr )

Definition at line 42 of file s_shiftNormSigF128M.c.

{
    uint32_t wordSig;
    int32_t exp;
    uint32_t leadingBit;
 
    wordSig = wPtr[indexWordHi( 4 )];
    exp = expF128UI96( wordSig );
    if ( exp ) {
        softfloat_shortShiftLeft128M( wPtr, shiftDist, sigPtr );
        leadingBit = 0x00010000<<shiftDist;
        sigPtr[indexWordHi( 4 )] =
            (sigPtr[indexWordHi( 4 )] & (leadingBit - 1)) | leadingBit;
    } else {
        exp = 16;
        wordSig &= 0x7FFFFFFF;
        if ( ! wordSig ) {
            exp = -16;
            wordSig = wPtr[indexWord( 4, 2 )];
            if ( ! wordSig ) {
                exp = -48;
                wordSig = wPtr[indexWord( 4, 1 )];
                if ( ! wordSig ) {
                    wordSig = wPtr[indexWord( 4, 0 )];
                    if ( ! wordSig ) return -128;
                    exp = -80;
                }
            }
        }
        exp -= softfloat_countLeadingZeros32( wordSig );
        softfloat_shiftLeft128M( wPtr, 1 - exp + shiftDist, sigPtr );
    }
    return exp;
 
}

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