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ashldi3.c

/*
 * Copyright 2004-2009 Analog Devices Inc.
 *
 * Licensed under the GPL-2 or later.
 */

#include "gcclib.h"

#ifdef CONFIG_ARITHMETIC_OPS_L1
DItype __ashldi3(DItype u, word_type b)__attribute__((l1_text));
#endif

DItype __ashldi3(DItype u, word_type b)
{
      DIunion w;
      word_type bm;
      DIunion uu;

      if (b == 0)
            return u;

      uu.ll = u;

      bm = (sizeof(SItype) * BITS_PER_UNIT) - b;
      if (bm <= 0) {
            w.s.low = 0;
            w.s.high = (USItype) uu.s.low << -bm;
      } else {
            USItype carries = (USItype) uu.s.low >> bm;
            w.s.low = (USItype) uu.s.low << b;
            w.s.high = ((USItype) uu.s.high << b) | carries;
      }

      return w.ll;
}

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