LXR linux/arch/blackfin/lib/ashldi3.c

   1/*
   2 * Copyright 2004-2009 Analog Devices Inc.
   3 *
   4 * Licensed under the GPL-2 or later.
   5 */
   6
   7#include "gcclib.h"
   8
   9#ifdef CONFIG_ARITHMETIC_OPS_L1
  10DItype __ashldi3(DItype u, word_type b)__attribute__((l1_text));
  11#endif
  12
  13DItype __ashldi3(DItype u, word_type b)
  14{
  15        DIunion w;
  16        word_type bm;
  17        DIunion uu;
  18
  19        if (b == 0)
  20                return u;
  21
  22        uu.ll = u;
  23
  24        bm = (sizeof(SItype) * BITS_PER_UNIT) - b;
  25        if (bm <= 0) {
  26                w.s.low = 0;
  27                w.s.high = (USItype) uu.s.low << -bm;
  28        } else {
  29                USItype carries = (USItype) uu.s.low >> bm;
  30                w.s.low = (USItype) uu.s.low << b;
  31                w.s.high = ((USItype) uu.s.high << b) | carries;
  32        }
  33
  34        return w.ll;
  35}
  36