s_shiftRightJam256M.c File Reference

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

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Functions
void	softfloat_shiftRightJam256M (const uint64_t *aPtr, uint_fast32_t dist, uint64_t *zPtr)

Function Documentation

softfloat_shiftRightJam256M()

void softfloat_shiftRightJam256M	(	const uint64_t *	aPtr,
		uint_fast32_t	dist,
		uint64_t *	zPtr )

Definition at line 73 of file s_shiftRightJam256M.c.

{
    uint64_t wordJam;
    uint_fast32_t wordDist;
    uint64_t *ptr;
    uint_fast8_t i, innerDist;
 
    wordJam = 0;
    wordDist = dist>>6;
    if ( wordDist ) {
        if ( 4 < wordDist ) wordDist = 4;
        ptr = (uint64_t *) (aPtr + indexMultiwordLo( 4, wordDist ));
        i = wordDist;
        do {
            wordJam = *ptr++;
            if ( wordJam ) break;
            --i;
        } while ( i );
        ptr = zPtr;
    }
    if ( wordDist < 4 ) {
        aPtr += indexMultiwordHiBut( 4, wordDist );
        innerDist = dist & 63;
        if ( innerDist ) {
            softfloat_shortShiftRightJamM(
                4 - wordDist,
                aPtr,
                innerDist,
                zPtr + indexMultiwordLoBut( 4, wordDist )
            );
            if ( ! wordDist ) goto wordJam;
        } else {
            aPtr += indexWordLo( 4 - wordDist );
            ptr = zPtr + indexWordLo( 4 );
            for ( i = 4 - wordDist; i; --i ) {
                *ptr = *aPtr;
                aPtr += wordIncr;
                ptr += wordIncr;
            }
        }
        ptr = zPtr + indexMultiwordHi( 4, wordDist );
    }
    do {
        *ptr++ = 0;
        --wordDist;
    } while ( wordDist );
 wordJam:
    if ( wordJam ) zPtr[indexWordLo( 4 )] |= 1;
 
}

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