1/* ashrdi3.c extracted from gcc-2.7.2/libgcc2.c which is: */
 2/* Copyright (C) 1989, 1992, 1993, 1994, 1995 Free Software Foundation, Inc.
 3
 4This file is part of GNU CC.
 5
 6GNU CC is free software; you can redistribute it and/or modify
 7it under the terms of the GNU General Public License as published by
 8the Free Software Foundation; either version 2, or (at your option)
 9any later version.
10
11GNU CC is distributed in the hope that it will be useful,
12but WITHOUT ANY WARRANTY; without even the implied warranty of
13MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
14GNU General Public License for more details. */
15
16#include <linux/compiler.h>
17#include <linux/export.h>
18
19#define BITS_PER_UNIT 8
20
21typedef		 int SItype	__mode(SI);
22typedef unsigned int USItype	__mode(SI);
23typedef		 int DItype	__mode(DI);
24typedef int word_type           __mode(__word__);
25
26struct DIstruct {SItype high, low;};
27
28typedef union
29{
30  struct DIstruct s;
31  DItype ll;
32} DIunion;
33
34DItype
35__ashrdi3 (DItype u, word_type b)
36{
37  DIunion w;
38  word_type bm;
39  DIunion uu;
40
41  if (b == 0)
42    return u;
43
44  uu.ll = u;
45
46  bm = (sizeof (SItype) * BITS_PER_UNIT) - b;
47  if (bm <= 0)
48    {
49      /* w.s.high = 1..1 or 0..0 */
50      w.s.high = uu.s.high >> (sizeof (SItype) * BITS_PER_UNIT - 1);
51      w.s.low = uu.s.high >> -bm;
52    }
53  else
54    {
55      USItype carries = (USItype)uu.s.high << bm;
56      w.s.high = uu.s.high >> b;
57      w.s.low = ((USItype)uu.s.low >> b) | carries;
58    }
59
60  return w.ll;
61}
62EXPORT_SYMBOL(__ashrdi3);

 1/* ashrdi3.c extracted from gcc-2.7.2/libgcc2.c which is: */
 2/* Copyright (C) 1989, 1992, 1993, 1994, 1995 Free Software Foundation, Inc.
 3
 4This file is part of GNU CC.
 5
 6GNU CC is free software; you can redistribute it and/or modify
 7it under the terms of the GNU General Public License as published by
 8the Free Software Foundation; either version 2, or (at your option)
 9any later version.
10
11GNU CC is distributed in the hope that it will be useful,
12but WITHOUT ANY WARRANTY; without even the implied warranty of
13MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
14GNU General Public License for more details. */
15
16#include <linux/compiler.h>
17#include <linux/export.h>
18
19#define BITS_PER_UNIT 8
20
21typedef		 int SItype	__mode(SI);
22typedef unsigned int USItype	__mode(SI);
23typedef		 int DItype	__mode(DI);
24typedef int word_type           __mode(__word__);
25
26struct DIstruct {SItype high, low;};
27
28typedef union
29{
30  struct DIstruct s;
31  DItype ll;
32} DIunion;
33
34DItype
35__ashrdi3 (DItype u, word_type b)
36{
37  DIunion w;
38  word_type bm;
39  DIunion uu;
40
41  if (b == 0)
42    return u;
43
44  uu.ll = u;
45
46  bm = (sizeof (SItype) * BITS_PER_UNIT) - b;
47  if (bm <= 0)
48    {
49      /* w.s.high = 1..1 or 0..0 */
50      w.s.high = uu.s.high >> (sizeof (SItype) * BITS_PER_UNIT - 1);
51      w.s.low = uu.s.high >> -bm;
52    }
53  else
54    {
55      USItype carries = (USItype)uu.s.high << bm;
56      w.s.high = uu.s.high >> b;
57      w.s.low = ((USItype)uu.s.low >> b) | carries;
58    }
59
60  return w.ll;
61}
62EXPORT_SYMBOL(__ashrdi3);