ashrdi3.c

Go to the documentation of this file.

#include <linux/module.h>

#include "libgcc.h"

long long __ashrdi3(long long u, word_type b)
{
    DWunion uu, w;
    word_type bm;

    if (b == 0)
        return u;

    uu.ll = u;
    bm = 32 - b;

    if (bm <= 0) {
        /* w.s.high = 1..1 or 0..0 */
        w.s.high =
            uu.s.high >> 31;
        w.s.low = uu.s.high >> -bm;
    } else {
        const unsigned int carries = (unsigned int) uu.s.high << bm;

        w.s.high = uu.s.high >> b;
        w.s.low = ((unsigned int) uu.s.low >> b) | carries;
    }

    return w.ll;
}

EXPORT_SYMBOL(__ashrdi3);